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87c39a41e6
Reading back from the WebGL context to the Skia context if we need to fall back software rasterization can be extremely expensive. In general, it is better to try to avoid this by rasterizing primitives in software and then uploading them to a texture. This generalizes that idea so that when using the default source-over blend mode, the Skia context can function as a layer that accumulates recently drawn primitives and blends them via source-over to the WebGL context when a flush is necessary. Differential Revision: https://phabricator.services.mozilla.com/D135260
214 lines
9.2 KiB
C++
214 lines
9.2 KiB
C++
/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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/* vim: set ts=8 sts=2 et sw=2 tw=80: */
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/* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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#ifndef _MOZILLA_GFX_DRAWTARGETSKIA_H
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#define _MOZILLA_GFX_DRAWTARGETSKIA_H
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#include "2D.h"
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#include <sstream>
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#include <vector>
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#ifdef MOZ_WIDGET_COCOA
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# include <ApplicationServices/ApplicationServices.h>
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#endif
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class SkCanvas;
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class SkSurface;
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namespace mozilla {
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template <>
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class RefPtrTraits<SkSurface> {
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public:
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static void Release(SkSurface* aSurface);
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static void AddRef(SkSurface* aSurface);
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};
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namespace gfx {
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class DataSourceSurface;
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class SourceSurfaceSkia;
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class BorrowedCGContext;
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class DrawTargetSkia : public DrawTarget {
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public:
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MOZ_DECLARE_REFCOUNTED_VIRTUAL_TYPENAME(DrawTargetSkia, override)
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DrawTargetSkia();
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virtual ~DrawTargetSkia();
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virtual DrawTargetType GetType() const override;
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virtual BackendType GetBackendType() const override {
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return BackendType::SKIA;
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}
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virtual already_AddRefed<SourceSurface> Snapshot() override;
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already_AddRefed<SourceSurface> GetBackingSurface() override;
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virtual IntSize GetSize() const override { return mSize; };
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virtual bool LockBits(uint8_t** aData, IntSize* aSize, int32_t* aStride,
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SurfaceFormat* aFormat,
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IntPoint* aOrigin = nullptr) override;
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virtual void ReleaseBits(uint8_t* aData) override;
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virtual void Flush() override;
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virtual void DrawSurface(
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SourceSurface* aSurface, const Rect& aDest, const Rect& aSource,
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const DrawSurfaceOptions& aSurfOptions = DrawSurfaceOptions(),
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const DrawOptions& aOptions = DrawOptions()) override;
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virtual void DrawFilter(FilterNode* aNode, const Rect& aSourceRect,
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const Point& aDestPoint,
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const DrawOptions& aOptions = DrawOptions()) override;
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virtual void DrawSurfaceWithShadow(SourceSurface* aSurface,
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const Point& aDest,
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const DeviceColor& aColor,
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const Point& aOffset, Float aSigma,
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CompositionOp aOperator) override;
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void Clear(const Rect* aRect = nullptr);
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virtual void ClearRect(const Rect& aRect) override { Clear(&aRect); }
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void BlendSurface(SourceSurface* aSurface, const IntRect& aSourceRect,
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const IntPoint& aDestination, CompositionOp aOperator);
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virtual void CopySurface(SourceSurface* aSurface, const IntRect& aSourceRect,
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const IntPoint& aDestination) override {
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BlendSurface(aSurface, aSourceRect, aDestination, CompositionOp::OP_SOURCE);
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}
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virtual void FillRect(const Rect& aRect, const Pattern& aPattern,
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const DrawOptions& aOptions = DrawOptions()) override;
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virtual void StrokeRect(const Rect& aRect, const Pattern& aPattern,
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const StrokeOptions& aStrokeOptions = StrokeOptions(),
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const DrawOptions& aOptions = DrawOptions()) override;
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virtual void StrokeLine(const Point& aStart, const Point& aEnd,
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const Pattern& aPattern,
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const StrokeOptions& aStrokeOptions = StrokeOptions(),
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const DrawOptions& aOptions = DrawOptions()) override;
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virtual void Stroke(const Path* aPath, const Pattern& aPattern,
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const StrokeOptions& aStrokeOptions = StrokeOptions(),
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const DrawOptions& aOptions = DrawOptions()) override;
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virtual void Fill(const Path* aPath, const Pattern& aPattern,
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const DrawOptions& aOptions = DrawOptions()) override;
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virtual void FillGlyphs(ScaledFont* aFont, const GlyphBuffer& aBuffer,
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const Pattern& aPattern,
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const DrawOptions& aOptions = DrawOptions()) override;
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virtual void StrokeGlyphs(
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ScaledFont* aFont, const GlyphBuffer& aBuffer, const Pattern& aPattern,
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const StrokeOptions& aStrokeOptions = StrokeOptions(),
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const DrawOptions& aOptions = DrawOptions()) override;
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virtual void Mask(const Pattern& aSource, const Pattern& aMask,
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const DrawOptions& aOptions = DrawOptions()) override;
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virtual void MaskSurface(
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const Pattern& aSource, SourceSurface* aMask, Point aOffset,
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const DrawOptions& aOptions = DrawOptions()) override;
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virtual bool Draw3DTransformedSurface(SourceSurface* aSurface,
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const Matrix4x4& aMatrix) override;
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virtual void PushClip(const Path* aPath) override;
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virtual void PushClipRect(const Rect& aRect) override;
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virtual void PushDeviceSpaceClipRects(const IntRect* aRects,
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uint32_t aCount) override;
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virtual void PopClip() override;
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virtual void PushLayer(bool aOpaque, Float aOpacity, SourceSurface* aMask,
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const Matrix& aMaskTransform,
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const IntRect& aBounds = IntRect(),
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bool aCopyBackground = false) override;
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virtual void PushLayerWithBlend(
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bool aOpaque, Float aOpacity, SourceSurface* aMask,
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const Matrix& aMaskTransform, const IntRect& aBounds = IntRect(),
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bool aCopyBackground = false,
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CompositionOp aCompositionOp = CompositionOp::OP_OVER) override;
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virtual void PopLayer() override;
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virtual already_AddRefed<SourceSurface> CreateSourceSurfaceFromData(
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unsigned char* aData, const IntSize& aSize, int32_t aStride,
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SurfaceFormat aFormat) const override;
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virtual already_AddRefed<SourceSurface> OptimizeSourceSurface(
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SourceSurface* aSurface) const override;
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virtual already_AddRefed<SourceSurface> OptimizeSourceSurfaceForUnknownAlpha(
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SourceSurface* aSurface) const override;
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virtual already_AddRefed<SourceSurface> CreateSourceSurfaceFromNativeSurface(
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const NativeSurface& aSurface) const override;
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virtual already_AddRefed<DrawTarget> CreateSimilarDrawTarget(
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const IntSize& aSize, SurfaceFormat aFormat) const override;
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virtual bool CanCreateSimilarDrawTarget(const IntSize& aSize,
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SurfaceFormat aFormat) const override;
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virtual RefPtr<DrawTarget> CreateClippedDrawTarget(
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const Rect& aBounds, SurfaceFormat aFormat) override;
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virtual already_AddRefed<PathBuilder> CreatePathBuilder(
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FillRule aFillRule = FillRule::FILL_WINDING) const override;
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virtual already_AddRefed<GradientStops> CreateGradientStops(
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GradientStop* aStops, uint32_t aNumStops,
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ExtendMode aExtendMode = ExtendMode::CLAMP) const override;
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virtual already_AddRefed<FilterNode> CreateFilter(FilterType aType) override;
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virtual void SetTransform(const Matrix& aTransform) override;
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virtual void* GetNativeSurface(NativeSurfaceType aType) override;
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virtual void DetachAllSnapshots() override { MarkChanged(); }
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bool Init(const IntSize& aSize, SurfaceFormat aFormat);
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bool Init(unsigned char* aData, const IntSize& aSize, int32_t aStride,
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SurfaceFormat aFormat, bool aUninitialized = false);
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bool Init(SkCanvas* aCanvas);
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bool Init(RefPtr<DataSourceSurface>&& aSurface);
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// Skia assumes that texture sizes fit in 16-bit signed integers.
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static size_t GetMaxSurfaceSize() { return 32767; }
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operator std::string() const {
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std::stringstream stream;
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stream << "DrawTargetSkia(" << this << ")";
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return stream.str();
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}
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Maybe<Rect> GetDeviceClipRect() const;
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Maybe<Rect> GetGlyphLocalBounds(ScaledFont* aFont, const GlyphBuffer& aBuffer,
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const Pattern& aPattern,
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const StrokeOptions* aStrokeOptions,
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const DrawOptions& aOptions);
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private:
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friend class SourceSurfaceSkia;
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static void ReleaseMappedSkSurface(void* aPixels, void* aContext);
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void MarkChanged();
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void DrawGlyphs(ScaledFont* aFont, const GlyphBuffer& aBuffer,
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const Pattern& aPattern,
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const StrokeOptions* aStrokeOptions = nullptr,
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const DrawOptions& aOptions = DrawOptions());
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struct PushedLayer {
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PushedLayer(bool aOldPermitSubpixelAA, SourceSurface* aMask)
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: mOldPermitSubpixelAA(aOldPermitSubpixelAA), mMask(aMask) {}
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bool mOldPermitSubpixelAA;
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RefPtr<SourceSurface> mMask;
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};
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std::vector<PushedLayer> mPushedLayers;
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IntSize mSize;
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RefPtr<SkSurface> mSurface;
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SkCanvas* mCanvas = nullptr;
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RefPtr<DataSourceSurface> mBackingSurface;
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RefPtr<SourceSurfaceSkia> mSnapshot;
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Mutex mSnapshotLock;
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#ifdef MOZ_WIDGET_COCOA
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friend class BorrowedCGContext;
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CGContextRef BorrowCGContext(const DrawOptions& aOptions);
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void ReturnCGContext(CGContextRef);
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bool FillGlyphsWithCG(ScaledFont* aFont, const GlyphBuffer& aBuffer,
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const Pattern& aPattern,
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const DrawOptions& aOptions = DrawOptions());
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CGContextRef mCG;
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CGColorSpaceRef mColorSpace;
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uint8_t* mCanvasData;
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IntSize mCGSize;
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bool mNeedLayer;
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#endif
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};
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} // namespace gfx
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} // namespace mozilla
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#endif // _MOZILLA_GFX_SOURCESURFACESKIA_H
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