Adding upstream version 4:7.4.7.upstream/4%7.4.7upstream

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

1 files changed, 333 insertions, 0 deletions

diff --git a/vcl/inc/skia/utils.hxx b/vcl/inc/skia/utils.hxx
new file mode 100644
index 000000000..355718e8b
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+++ b/vcl/inc/skia/utils.hxx
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+/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
+/*
+ * This file is part of the LibreOffice project.
+ *
+ * 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/.
+ *
+ * This file incorporates work covered by the following license notice:
+ *
+ *   Licensed to the Apache Software Foundation (ASF) under one or more
+ *   contributor license agreements. See the NOTICE file distributed
+ *   with this work for additional information regarding copyright
+ *   ownership. The ASF licenses this file to you under the Apache
+ *   License, Version 2.0 (the "License"); you may not use this file
+ *   except in compliance with the License. You may obtain a copy of
+ *   the License at http://www.apache.org/licenses/LICENSE-2.0 .
+ */
+
+#ifndef INCLUDED_VCL_INC_SKIA_UTILS_H
+#define INCLUDED_VCL_INC_SKIA_UTILS_H
+
+#include <vcl/skia/SkiaHelper.hxx>
+
+#include <tools/gen.hxx>
+#include <driverblocklist.hxx>
+#include <vcl/bitmap.hxx>
+#include <vcl/salgtype.hxx>
+
+#include <test/GraphicsRenderTests.hxx>
+
+#include <premac.h>
+#include <SkRegion.h>
+#include <SkSurface.h>
+#include <tools/sk_app/WindowContext.h>
+#include <postmac.h>
+
+#include <string_view>
+
+namespace SkiaHelper
+{
+// Get the one shared GrDirectContext instance.
+GrDirectContext* getSharedGrDirectContext();
+
+void disableRenderMethod(RenderMethod method);
+
+// Create SkSurface, GPU-backed if possible.
+VCL_DLLPUBLIC sk_sp<SkSurface> createSkSurface(int width, int height,
+                                               SkColorType type = kN32_SkColorType,
+                                               SkAlphaType alpha = kPremul_SkAlphaType);
+
+inline sk_sp<SkSurface> createSkSurface(const Size& size, SkColorType type = kN32_SkColorType,
+                                        SkAlphaType alpha = kPremul_SkAlphaType)
+{
+    return createSkSurface(size.Width(), size.Height(), type, alpha);
+}
+
+inline sk_sp<SkSurface> createSkSurface(int width, int height, SkAlphaType alpha)
+{
+    return createSkSurface(width, height, kN32_SkColorType, alpha);
+}
+
+inline sk_sp<SkSurface> createSkSurface(const Size& size, SkAlphaType alpha)
+{
+    return createSkSurface(size.Width(), size.Height(), kN32_SkColorType, alpha);
+}
+
+// Create SkImage, GPU-backed if possible.
+VCL_DLLPUBLIC sk_sp<SkImage> createSkImage(const SkBitmap& bitmap);
+
+// Call surface->makeImageSnapshot() and abort on failure.
+VCL_DLLPUBLIC sk_sp<SkImage> makeCheckedImageSnapshot(sk_sp<SkSurface> surface);
+VCL_DLLPUBLIC sk_sp<SkImage> makeCheckedImageSnapshot(sk_sp<SkSurface> surface,
+                                                      const SkIRect& bounds);
+
+inline Size imageSize(const sk_sp<SkImage>& image) { return Size(image->width(), image->height()); }
+
+inline SkColor toSkColor(Color color)
+{
+    return SkColorSetARGB(color.GetAlpha(), color.GetRed(), color.GetGreen(), color.GetBlue());
+}
+
+inline SkColor toSkColorWithTransparency(Color aColor, double fTransparency)
+{
+    return SkColorSetA(toSkColor(aColor), 255 * (1.0 - fTransparency));
+}
+
+inline SkColor toSkColorWithIntensity(Color color, int intensity)
+{
+    return SkColorSetARGB(color.GetAlpha(), color.GetRed() * intensity / 100,
+                          color.GetGreen() * intensity / 100, color.GetBlue() * intensity / 100);
+}
+
+inline Color fromSkColor(SkColor color)
+{
+    return Color(ColorAlpha, SkColorGetA(color), SkColorGetR(color), SkColorGetG(color),
+                 SkColorGetB(color));
+}
+
+// Whether to use GetSkImage() that checks for delayed scaling or whether to access
+// the stored image directly without checks.
+enum DirectImage
+{
+    Yes,
+    No
+};
+
+// Sets SkBlender that will do an invert operation.
+void setBlenderInvert(SkPaint* paint);
+// Sets SkBlender that will do a xor operation.
+void setBlenderXor(SkPaint* paint);
+
+// Must be called in any VCL backend before any Skia functionality is used.
+// If not set, Skia will be disabled.
+VCL_DLLPUBLIC void
+    prepareSkia(std::unique_ptr<sk_app::WindowContext> (*createGpuWindowContext)(bool));
+
+// Shared cache of images.
+void addCachedImage(const OString& key, sk_sp<SkImage> image);
+sk_sp<SkImage> findCachedImage(const OString& key);
+void removeCachedImage(sk_sp<SkImage> image);
+tools::Long maxImageCacheSize();
+
+// Get checksum of the image content, only for raster images. Is cached,
+// but may still be somewhat expensive.
+uint32_t getSkImageChecksum(sk_sp<SkImage> image);
+
+// SkSurfaceProps to be used by all Skia surfaces.
+VCL_DLLPUBLIC const SkSurfaceProps* surfaceProps();
+// Set pixel geometry to be used by SkSurfaceProps.
+VCL_DLLPUBLIC void setPixelGeometry(SkPixelGeometry pixelGeometry);
+
+inline bool isUnitTestRunning(const char* name = nullptr)
+{
+    if (name == nullptr)
+    {
+        static const char* const testname = getenv("LO_TESTNAME");
+        if (testname != nullptr)
+            return true;
+        return !vcl::test::activeGraphicsRenderTest().isEmpty();
+    }
+    const char* const testname = getenv("LO_TESTNAME");
+    if (testname != nullptr && std::string_view(name) == testname)
+        return true;
+    return vcl::test::activeGraphicsRenderTest().equalsAscii(name);
+}
+
+// Scaling done on the GPU is fast, but bicubic done in raster mode can be slow
+// if done too much, and it generally shouldn't be needed for to-screen drawing.
+// In that case use only BmpScaleFlag::Default, which is bilinear+mipmap,
+// which should be good enough (and that's what the "super" bitmap scaling
+// algorithm done by VCL does as well).
+inline BmpScaleFlag goodScalingQuality(bool isGPU)
+{
+    return isGPU ? BmpScaleFlag::BestQuality : BmpScaleFlag::Default;
+}
+
+// Normal scaling algorithms have a poor quality when downscaling a lot.
+// https://bugs.chromium.org/p/skia/issues/detail?id=11810 suggests to use mipmaps
+// in such a case, which is annoying to do explicitly instead of Skia deciding which
+// algorithm would be the best, but now with Skia removing SkFilterQuality and requiring
+// explicitly being told what algorithm to use this appears to be the best we can do.
+// Anything scaled down at least this ratio will use linear+mipmaps.
+constexpr int downscaleRatioThreshold = 4;
+
+inline SkSamplingOptions makeSamplingOptions(BmpScaleFlag scalingType, SkMatrix matrix,
+                                             int scalingFactor)
+{
+    switch (scalingType)
+    {
+        case BmpScaleFlag::BestQuality:
+            if (scalingFactor != 1)
+                matrix.postScale(scalingFactor, scalingFactor);
+            if (matrix.getScaleX() <= 1.0 / downscaleRatioThreshold
+                || matrix.getScaleY() <= 1.0 / downscaleRatioThreshold)
+                return SkSamplingOptions(SkFilterMode::kLinear, SkMipmapMode::kLinear);
+            return SkSamplingOptions(SkCubicResampler::Mitchell());
+        case BmpScaleFlag::Default:
+            // Use SkMipmapMode::kNearest for better quality when downscaling. SkMipmapMode::kLinear
+            // would be even better, but it is not specially optimized in raster mode.
+            return SkSamplingOptions(SkFilterMode::kLinear, SkMipmapMode::kNearest);
+        case BmpScaleFlag::Fast:
+        case BmpScaleFlag::NearestNeighbor:
+            return SkSamplingOptions(SkFilterMode::kNearest, SkMipmapMode::kNone);
+        default:
+            assert(false);
+            return SkSamplingOptions();
+    }
+}
+
+inline SkSamplingOptions makeSamplingOptions(BmpScaleFlag scalingType, const Size& srcSize,
+                                             Size destSize, int scalingFactor)
+{
+    switch (scalingType)
+    {
+        case BmpScaleFlag::BestQuality:
+            if (scalingFactor != 1)
+                destSize *= scalingFactor;
+            if (srcSize.Width() / destSize.Width() >= downscaleRatioThreshold
+                || srcSize.Height() / destSize.Height() >= downscaleRatioThreshold)
+                return SkSamplingOptions(SkFilterMode::kLinear, SkMipmapMode::kLinear);
+            return SkSamplingOptions(SkCubicResampler::Mitchell());
+        case BmpScaleFlag::Default:
+            // As in the first overload, use kNearest.
+            return SkSamplingOptions(SkFilterMode::kLinear, SkMipmapMode::kNearest);
+        case BmpScaleFlag::Fast:
+        case BmpScaleFlag::NearestNeighbor:
+            return SkSamplingOptions(SkFilterMode::kNearest, SkMipmapMode::kNone);
+        default:
+            assert(false);
+            return SkSamplingOptions();
+    }
+}
+
+inline SkSamplingOptions makeSamplingOptions(const SalTwoRect& rPosAry, int scalingFactor,
+                                             int srcScalingFactor, bool isGPU)
+{
+    // If there will be scaling, make it smooth, but not in unittests, as those often
+    // require exact color values and would be confused by this.
+    if (isUnitTestRunning())
+        return SkSamplingOptions(); // none
+    Size srcSize(rPosAry.mnSrcWidth, rPosAry.mnSrcHeight);
+    Size destSize(rPosAry.mnDestWidth, rPosAry.mnDestHeight);
+    if (scalingFactor != 1)
+        destSize *= scalingFactor;
+    if (srcScalingFactor != 1)
+        srcSize *= srcScalingFactor;
+    if (srcSize != destSize)
+        return makeSamplingOptions(goodScalingQuality(isGPU), srcSize, destSize, 1);
+    return SkSamplingOptions(); // none
+}
+
+inline SkRect scaleRect(const SkRect& rect, int scaling)
+{
+    return SkRect::MakeXYWH(rect.x() * scaling, rect.y() * scaling, rect.width() * scaling,
+                            rect.height() * scaling);
+}
+
+inline SkIRect scaleRect(const SkIRect& rect, int scaling)
+{
+    return SkIRect::MakeXYWH(rect.x() * scaling, rect.y() * scaling, rect.width() * scaling,
+                             rect.height() * scaling);
+}
+
+#ifdef DBG_UTIL
+void prefillSurface(const sk_sp<SkSurface>& surface);
+#endif
+
+VCL_DLLPUBLIC void dump(const SkBitmap& bitmap, const char* file);
+VCL_DLLPUBLIC void dump(const sk_sp<SkImage>& image, const char* file);
+VCL_DLLPUBLIC void dump(const sk_sp<SkSurface>& surface, const char* file);
+
+VCL_DLLPUBLIC extern uint32_t vendorId;
+
+inline DriverBlocklist::DeviceVendor getVendor()
+{
+    return DriverBlocklist::GetVendorFromId(vendorId);
+}
+
+} // namespace SkiaHelper
+
+// For unittests.
+namespace SkiaTests
+{
+VCL_DLLPUBLIC bool matrixNeedsHighQuality(const SkMatrix& matrix);
+}
+
+template <typename charT, typename traits>
+inline std::basic_ostream<charT, traits>& operator<<(std::basic_ostream<charT, traits>& stream,
+                                                     const SkRect& rectangle)
+{
+    if (rectangle.isEmpty())
+        return stream << "EMPTY";
+    else
+        return stream << rectangle.width() << 'x' << rectangle.height() << "@(" << rectangle.x()
+                      << ',' << rectangle.y() << ")";
+}
+
+template <typename charT, typename traits>
+inline std::basic_ostream<charT, traits>& operator<<(std::basic_ostream<charT, traits>& stream,
+                                                     const SkIRect& rectangle)
+{
+    if (rectangle.isEmpty())
+        return stream << "EMPTY";
+    else
+        return stream << rectangle.width() << 'x' << rectangle.height() << "@(" << rectangle.x()
+                      << ',' << rectangle.y() << ")";
+}
+
+template <typename charT, typename traits>
+inline std::basic_ostream<charT, traits>& operator<<(std::basic_ostream<charT, traits>& stream,
+                                                     const SkRegion& region)
+{
+    if (region.isEmpty())
+        return stream << "EMPTY";
+    stream << "(";
+    SkRegion::Iterator it(region);
+    for (int i = 0; !it.done(); it.next(), ++i)
+        stream << "[" << i << "] " << it.rect();
+    stream << ")";
+    return stream;
+}
+
+template <typename charT, typename traits>
+inline std::basic_ostream<charT, traits>& operator<<(std::basic_ostream<charT, traits>& stream,
+                                                     const SkMatrix& matrix)
+{
+    return stream << "[" << matrix[0] << " " << matrix[1] << " " << matrix[2] << "]"
+                  << "[" << matrix[3] << " " << matrix[4] << " " << matrix[5] << "]"
+                  << "[" << matrix[6] << " " << matrix[7] << " " << matrix[8] << "]";
+}
+
+template <typename charT, typename traits>
+inline std::basic_ostream<charT, traits>& operator<<(std::basic_ostream<charT, traits>& stream,
+                                                     const SkImage& image)
+{
+    // G - on GPU
+    return stream << static_cast<const void*>(&image) << " " << Size(image.width(), image.height())
+                  << "/" << (SkColorTypeBytesPerPixel(image.imageInfo().colorType()) * 8)
+                  << (image.isTextureBacked() ? "G" : "");
+}
+template <typename charT, typename traits>
+inline std::basic_ostream<charT, traits>& operator<<(std::basic_ostream<charT, traits>& stream,
+                                                     const sk_sp<SkImage>& image)
+{
+    if (image == nullptr)
+        return stream << "(null)";
+    return stream << *image;
+}
+
+#endif // INCLUDED_VCL_INC_SKIA_UTILS_H
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */