Adding upstream version 1:115.7.0.upstream/1%115.7.0upstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 339 insertions, 0 deletions

diff --git a/gfx/2d/DrawTarget.cpp b/gfx/2d/DrawTarget.cpp
new file mode 100644
index 0000000000..eb7b23f3be
--- /dev/null
+++ b/gfx/2d/DrawTarget.cpp
@@ -0,0 +1,339 @@
+/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* vim: set ts=8 sts=2 et sw=2 tw=80: */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+#include "2D.h"
+#include "Blur.h"
+#include "Logging.h"
+#include "PathHelpers.h"
+#include "SourceSurfaceRawData.h"
+#include "Tools.h"
+
+#include "BufferEdgePad.h"
+#include "BufferUnrotate.h"
+
+#ifdef USE_NEON
+#  include "mozilla/arm.h"
+#  include "LuminanceNEON.h"
+#endif
+
+namespace mozilla {
+namespace gfx {
+
+/**
+ * Byte offsets of channels in a native packed gfxColor or cairo image surface.
+ */
+#ifdef IS_BIG_ENDIAN
+#  define GFX_ARGB32_OFFSET_A 0
+#  define GFX_ARGB32_OFFSET_R 1
+#  define GFX_ARGB32_OFFSET_G 2
+#  define GFX_ARGB32_OFFSET_B 3
+#else
+#  define GFX_ARGB32_OFFSET_A 3
+#  define GFX_ARGB32_OFFSET_R 2
+#  define GFX_ARGB32_OFFSET_G 1
+#  define GFX_ARGB32_OFFSET_B 0
+#endif
+
+// c = n / 255
+// c <= 0.04045 ? c / 12.92 : pow((c + 0.055) / 1.055, 2.4)) * 255 + 0.5
+static const uint8_t gsRGBToLinearRGBMap[256] = {
+    0,   0,   0,   0,   0,   0,   0,   1,   1,   1,   1,   1,   1,   1,   1,
+    1,   1,   1,   2,   2,   2,   2,   2,   2,   2,   2,   3,   3,   3,   3,
+    3,   3,   4,   4,   4,   4,   4,   5,   5,   5,   5,   6,   6,   6,   6,
+    7,   7,   7,   8,   8,   8,   8,   9,   9,   9,   10,  10,  10,  11,  11,
+    12,  12,  12,  13,  13,  13,  14,  14,  15,  15,  16,  16,  17,  17,  17,
+    18,  18,  19,  19,  20,  20,  21,  22,  22,  23,  23,  24,  24,  25,  25,
+    26,  27,  27,  28,  29,  29,  30,  30,  31,  32,  32,  33,  34,  35,  35,
+    36,  37,  37,  38,  39,  40,  41,  41,  42,  43,  44,  45,  45,  46,  47,
+    48,  49,  50,  51,  51,  52,  53,  54,  55,  56,  57,  58,  59,  60,  61,
+    62,  63,  64,  65,  66,  67,  68,  69,  70,  71,  72,  73,  74,  76,  77,
+    78,  79,  80,  81,  82,  84,  85,  86,  87,  88,  90,  91,  92,  93,  95,
+    96,  97,  99,  100, 101, 103, 104, 105, 107, 108, 109, 111, 112, 114, 115,
+    116, 118, 119, 121, 122, 124, 125, 127, 128, 130, 131, 133, 134, 136, 138,
+    139, 141, 142, 144, 146, 147, 149, 151, 152, 154, 156, 157, 159, 161, 163,
+    164, 166, 168, 170, 171, 173, 175, 177, 179, 181, 183, 184, 186, 188, 190,
+    192, 194, 196, 198, 200, 202, 204, 206, 208, 210, 212, 214, 216, 218, 220,
+    222, 224, 226, 229, 231, 233, 235, 237, 239, 242, 244, 246, 248, 250, 253,
+    255};
+
+static void ComputesRGBLuminanceMask(const uint8_t* aSourceData,
+                                     int32_t aSourceStride, uint8_t* aDestData,
+                                     int32_t aDestStride, const IntSize& aSize,
+                                     float aOpacity) {
+#ifdef USE_NEON
+  if (mozilla::supports_neon()) {
+    ComputesRGBLuminanceMask_NEON(aSourceData, aSourceStride, aDestData,
+                                  aDestStride, aSize, aOpacity);
+    return;
+  }
+#endif
+
+  int32_t redFactor = 55 * aOpacity;     // 255 * 0.2125 * opacity
+  int32_t greenFactor = 183 * aOpacity;  // 255 * 0.7154 * opacity
+  int32_t blueFactor = 18 * aOpacity;    // 255 * 0.0721
+  int32_t sourceOffset = aSourceStride - 4 * aSize.width;
+  const uint8_t* sourcePixel = aSourceData;
+  int32_t destOffset = aDestStride - aSize.width;
+  uint8_t* destPixel = aDestData;
+
+  for (int32_t y = 0; y < aSize.height; y++) {
+    for (int32_t x = 0; x < aSize.width; x++) {
+      uint8_t a = sourcePixel[GFX_ARGB32_OFFSET_A];
+
+      if (a) {
+        *destPixel = (redFactor * sourcePixel[GFX_ARGB32_OFFSET_R] +
+                      greenFactor * sourcePixel[GFX_ARGB32_OFFSET_G] +
+                      blueFactor * sourcePixel[GFX_ARGB32_OFFSET_B]) >>
+                     8;
+      } else {
+        *destPixel = 0;
+      }
+      sourcePixel += 4;
+      destPixel++;
+    }
+    sourcePixel += sourceOffset;
+    destPixel += destOffset;
+  }
+}
+
+static void ComputeLinearRGBLuminanceMask(
+    const uint8_t* aSourceData, int32_t aSourceStride, uint8_t* aDestData,
+    int32_t aDestStride, const IntSize& aSize, float aOpacity) {
+  int32_t redFactor = 55 * aOpacity;     // 255 * 0.2125 * opacity
+  int32_t greenFactor = 183 * aOpacity;  // 255 * 0.7154 * opacity
+  int32_t blueFactor = 18 * aOpacity;    // 255 * 0.0721
+  int32_t sourceOffset = aSourceStride - 4 * aSize.width;
+  const uint8_t* sourcePixel = aSourceData;
+  int32_t destOffset = aDestStride - aSize.width;
+  uint8_t* destPixel = aDestData;
+
+  for (int32_t y = 0; y < aSize.height; y++) {
+    for (int32_t x = 0; x < aSize.width; x++) {
+      uint8_t a = sourcePixel[GFX_ARGB32_OFFSET_A];
+
+      // unpremultiply
+      if (a) {
+        if (a == 255) {
+          /* sRGB -> linearRGB -> intensity */
+          *destPixel = static_cast<uint8_t>(
+              (gsRGBToLinearRGBMap[sourcePixel[GFX_ARGB32_OFFSET_R]] *
+                   redFactor +
+               gsRGBToLinearRGBMap[sourcePixel[GFX_ARGB32_OFFSET_G]] *
+                   greenFactor +
+               gsRGBToLinearRGBMap[sourcePixel[GFX_ARGB32_OFFSET_B]] *
+                   blueFactor) >>
+              8);
+        } else {
+          uint8_t tempPixel[4];
+          tempPixel[GFX_ARGB32_OFFSET_B] =
+              (255 * sourcePixel[GFX_ARGB32_OFFSET_B]) / a;
+          tempPixel[GFX_ARGB32_OFFSET_G] =
+              (255 * sourcePixel[GFX_ARGB32_OFFSET_G]) / a;
+          tempPixel[GFX_ARGB32_OFFSET_R] =
+              (255 * sourcePixel[GFX_ARGB32_OFFSET_R]) / a;
+
+          /* sRGB -> linearRGB -> intensity */
+          *destPixel = static_cast<uint8_t>(
+              ((gsRGBToLinearRGBMap[tempPixel[GFX_ARGB32_OFFSET_R]] *
+                    redFactor +
+                gsRGBToLinearRGBMap[tempPixel[GFX_ARGB32_OFFSET_G]] *
+                    greenFactor +
+                gsRGBToLinearRGBMap[tempPixel[GFX_ARGB32_OFFSET_B]] *
+                    blueFactor) >>
+               8) *
+              (a / 255.0f));
+        }
+      } else {
+        *destPixel = 0;
+      }
+      sourcePixel += 4;
+      destPixel++;
+    }
+    sourcePixel += sourceOffset;
+    destPixel += destOffset;
+  }
+}
+
+void DrawTarget::PushDeviceSpaceClipRects(const IntRect* aRects,
+                                          uint32_t aCount) {
+  Matrix oldTransform = GetTransform();
+  SetTransform(Matrix());
+
+  RefPtr<PathBuilder> pathBuilder = CreatePathBuilder();
+  for (uint32_t i = 0; i < aCount; i++) {
+    AppendRectToPath(pathBuilder, Rect(aRects[i]));
+  }
+  RefPtr<Path> path = pathBuilder->Finish();
+  PushClip(path);
+
+  SetTransform(oldTransform);
+}
+
+void DrawTarget::FillRoundedRect(const RoundedRect& aRect,
+                                 const Pattern& aPattern,
+                                 const DrawOptions& aOptions) {
+  RefPtr<Path> path = MakePathForRoundedRect(*this, aRect.rect, aRect.corners);
+  Fill(path, aPattern, aOptions);
+}
+
+void DrawTarget::StrokeGlyphs(ScaledFont* aFont, const GlyphBuffer& aBuffer,
+                              const Pattern& aPattern,
+                              const StrokeOptions& aStrokeOptions,
+                              const DrawOptions& aOptions) {
+  RefPtr<Path> path = aFont->GetPathForGlyphs(aBuffer, this);
+  Stroke(path, aPattern, aStrokeOptions, aOptions);
+}
+
+already_AddRefed<SourceSurface> DrawTarget::IntoLuminanceSource(
+    LuminanceType aMaskType, float aOpacity) {
+  // The default IntoLuminanceSource implementation needs a format of B8G8R8A8.
+  if (mFormat != SurfaceFormat::B8G8R8A8) {
+    return nullptr;
+  }
+
+  RefPtr<SourceSurface> surface = Snapshot();
+  if (!surface) {
+    return nullptr;
+  }
+
+  IntSize size = surface->GetSize();
+
+  RefPtr<DataSourceSurface> maskSurface = surface->GetDataSurface();
+  if (!maskSurface) {
+    return nullptr;
+  }
+
+  DataSourceSurface::MappedSurface map;
+  if (!maskSurface->Map(DataSourceSurface::MapType::READ, &map)) {
+    return nullptr;
+  }
+
+  // Create alpha channel mask for output
+  RefPtr<SourceSurfaceAlignedRawData> destMaskSurface =
+      new SourceSurfaceAlignedRawData;
+  if (!destMaskSurface->Init(size, SurfaceFormat::A8, false, 0)) {
+    return nullptr;
+  }
+  DataSourceSurface::MappedSurface destMap;
+  if (!destMaskSurface->Map(DataSourceSurface::MapType::WRITE, &destMap)) {
+    return nullptr;
+  }
+
+  switch (aMaskType) {
+    case LuminanceType::LUMINANCE: {
+      ComputesRGBLuminanceMask(map.mData, map.mStride, destMap.mData,
+                               destMap.mStride, size, aOpacity);
+      break;
+    }
+    case LuminanceType::LINEARRGB: {
+      ComputeLinearRGBLuminanceMask(map.mData, map.mStride, destMap.mData,
+                                    destMap.mStride, size, aOpacity);
+      break;
+    }
+  }
+
+  maskSurface->Unmap();
+  destMaskSurface->Unmap();
+
+  return destMaskSurface.forget();
+}
+
+void DrawTarget::Blur(const AlphaBoxBlur& aBlur) {
+  uint8_t* data;
+  IntSize size;
+  int32_t stride;
+  SurfaceFormat format;
+  if (!LockBits(&data, &size, &stride, &format)) {
+    gfxWarning() << "Cannot perform in-place blur on non-data DrawTarget";
+    return;
+  }
+
+  // Sanity check that the blur size matches the draw target.
+  MOZ_ASSERT(size == aBlur.GetSize());
+  MOZ_ASSERT(stride == aBlur.GetStride());
+  aBlur.Blur(data);
+
+  ReleaseBits(data);
+}
+
+void DrawTarget::PadEdges(const IntRegion& aRegion) {
+  PadDrawTargetOutFromRegion(this, aRegion);
+}
+
+bool DrawTarget::Unrotate(IntPoint aRotation) {
+  unsigned char* data;
+  IntSize size;
+  int32_t stride;
+  SurfaceFormat format;
+
+  if (LockBits(&data, &size, &stride, &format)) {
+    uint8_t bytesPerPixel = BytesPerPixel(format);
+    BufferUnrotate(data, size.width * bytesPerPixel, size.height, stride,
+                   aRotation.x * bytesPerPixel, aRotation.y);
+    ReleaseBits(data);
+    return true;
+  }
+  return false;
+}
+
+int32_t ShadowOptions::BlurRadius() const {
+  return AlphaBoxBlur::CalculateBlurRadius(Point(mSigma, mSigma)).width;
+}
+
+void DrawTarget::DrawShadow(const Path* aPath, const Pattern& aPattern,
+                            const ShadowOptions& aShadow,
+                            const DrawOptions& aOptions,
+                            const StrokeOptions* aStrokeOptions) {
+  // Get the approximate bounds of the source path
+  Rect bounds = aPath->GetFastBounds(GetTransform(), aStrokeOptions);
+  if (bounds.IsEmpty()) {
+    return;
+  }
+  // Inflate the bounds by the blur radius
+  bounds += aShadow.mOffset;
+  int32_t blurRadius = aShadow.BlurRadius();
+  bounds.Inflate(blurRadius);
+  bounds.RoundOut();
+  // Check if the bounds intersect the viewport
+  Rect viewport(GetRect());
+  viewport.Inflate(blurRadius);
+  bounds = bounds.Intersect(viewport);
+  IntRect intBounds;
+  if (bounds.IsEmpty() || !bounds.ToIntRect(&intBounds) ||
+      !CanCreateSimilarDrawTarget(intBounds.Size(), SurfaceFormat::A8)) {
+    return;
+  }
+  // Create a draw target for drawing the shadow mask with enough room for blur
+  RefPtr<DrawTarget> shadowTarget = CreateShadowDrawTarget(
+      intBounds.Size(), SurfaceFormat::A8, aShadow.mSigma);
+  if (shadowTarget) {
+    // See bug 1524554.
+    shadowTarget->ClearRect(Rect());
+  }
+  if (!shadowTarget || !shadowTarget->IsValid()) {
+    return;
+  }
+  // Draw the path into the target for the initial shadow mask
+  Point offset = Point(intBounds.TopLeft()) - aShadow.mOffset;
+  shadowTarget->SetTransform(GetTransform().PostTranslate(-offset));
+  DrawOptions shadowDrawOptions(
+      aOptions.mAlpha, CompositionOp::OP_OVER,
+      blurRadius > 1 ? AntialiasMode::NONE : aOptions.mAntialiasMode);
+  if (aStrokeOptions) {
+    shadowTarget->Stroke(aPath, aPattern, *aStrokeOptions, shadowDrawOptions);
+  } else {
+    shadowTarget->Fill(aPath, aPattern, shadowDrawOptions);
+  }
+  RefPtr<SourceSurface> snapshot = shadowTarget->Snapshot();
+  // Finally, hand a snapshot of the mask to DrawSurfaceWithShadow for the
+  // final shadow blur
+  if (snapshot) {
+    DrawSurfaceWithShadow(snapshot, offset, aShadow, aOptions.mCompositionOp);
+  }
+}
+
+}  // namespace gfx
+}  // namespace mozilla