зеркало из https://github.com/mozilla/gecko-dev.git
240 строки
9.5 KiB
C++
240 строки
9.5 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_DRAWTARGET_CAIRO_H_
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#define _MOZILLA_GFX_DRAWTARGET_CAIRO_H_
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#include "2D.h"
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#include "cairo.h"
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#include "PathCairo.h"
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#include <vector>
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namespace mozilla {
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namespace gfx {
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class SourceSurfaceCairo;
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class GradientStopsCairo : public GradientStops {
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public:
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MOZ_DECLARE_REFCOUNTED_VIRTUAL_TYPENAME(GradientStopsCairo, override)
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GradientStopsCairo(GradientStop* aStops, uint32_t aNumStops,
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ExtendMode aExtendMode)
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: mExtendMode(aExtendMode) {
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for (uint32_t i = 0; i < aNumStops; ++i) {
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mStops.push_back(aStops[i]);
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}
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}
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virtual ~GradientStopsCairo() = default;
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const std::vector<GradientStop>& GetStops() const { return mStops; }
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ExtendMode GetExtendMode() const { return mExtendMode; }
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virtual BackendType GetBackendType() const override {
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return BackendType::CAIRO;
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}
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private:
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std::vector<GradientStop> mStops;
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ExtendMode mExtendMode;
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};
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class DrawTargetCairo final : public DrawTarget {
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public:
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MOZ_DECLARE_REFCOUNTED_VIRTUAL_TYPENAME(DrawTargetCairo, override)
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friend class BorrowedCairoContext;
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friend class BorrowedXlibDrawable;
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DrawTargetCairo();
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virtual ~DrawTargetCairo();
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virtual bool IsValid() const override;
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virtual DrawTargetType GetType() const override;
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virtual BackendType GetBackendType() const override {
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return BackendType::CAIRO;
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}
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virtual already_AddRefed<SourceSurface> Snapshot() override;
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virtual IntSize GetSize() const override;
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virtual bool IsCurrentGroupOpaque() override;
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virtual void SetPermitSubpixelAA(bool aPermitSubpixelAA) override;
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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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virtual void ClearRect(const Rect& aRect) override;
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virtual void CopySurface(SourceSurface* aSurface, const IntRect& aSourceRect,
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const IntPoint& aDestination) override;
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virtual void CopyRect(const IntRect& aSourceRect,
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const IntPoint& aDestination) override;
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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) 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 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 PopLayer() 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<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> 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 already_AddRefed<DrawTarget> CreateShadowDrawTarget(
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const IntSize& aSize, SurfaceFormat aFormat, float aSigma) 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<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* GetNativeSurface(NativeSurfaceType aType) override;
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bool Init(cairo_surface_t* aSurface, const IntSize& aSize,
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SurfaceFormat* aFormat = nullptr);
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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);
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virtual void SetTransform(const Matrix& aTransform) override;
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virtual void DetachAllSnapshots() override { MarkSnapshotIndependent(); }
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// Call to set up aContext for drawing (with the current transform, etc).
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// Pass the path you're going to be using if you have one.
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// Implicitly calls WillChange(aPath).
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void PrepareForDrawing(cairo_t* aContext, const Path* aPath = nullptr);
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static cairo_surface_t* GetDummySurface();
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// Cairo hardcodes this as its maximum surface size.
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static size_t GetMaxSurfaceSize() { return 32766; }
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private: // methods
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// Init cairo surface without doing a cairo_surface_reference() call.
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bool InitAlreadyReferenced(cairo_surface_t* aSurface, const IntSize& aSize,
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SurfaceFormat* aFormat = nullptr);
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enum DrawPatternType { DRAW_FILL, DRAW_STROKE };
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void DrawPattern(const Pattern& aPattern, const StrokeOptions& aStrokeOptions,
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const DrawOptions& aOptions, DrawPatternType aDrawType,
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bool aPathBoundsClip = false);
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void CopySurfaceInternal(cairo_surface_t* aSurface, const IntRect& aSource,
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const IntPoint& aDest);
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Rect GetUserSpaceClip() const;
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// Call before you make any changes to the backing surface with which this
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// context is associated. Pass the path you're going to be using if you have
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// one.
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void WillChange(const Path* aPath = nullptr);
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// Call if there is any reason to disassociate the snapshot from this draw
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// target; for example, because we're going to be destroyed.
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void MarkSnapshotIndependent();
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// If the current operator is "source" then clear the destination before we
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// draw into it, to simulate the effect of an unbounded source operator.
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void ClearSurfaceForUnboundedSource(const CompositionOp& aOperator);
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// Set the Cairo context font options according to the current draw target
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// font state.
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void SetFontOptions(cairo_antialias_t aAAMode = CAIRO_ANTIALIAS_DEFAULT);
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private: // data
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cairo_t* mContext;
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cairo_surface_t* mSurface;
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IntSize mSize;
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bool mTransformSingular;
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uint8_t* mLockedBits;
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cairo_font_options_t* mFontOptions;
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struct PushedLayer {
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PushedLayer(Float aOpacity, bool aWasPermittingSubpixelAA)
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: mOpacity(aOpacity),
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mMaskPattern(nullptr),
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mWasPermittingSubpixelAA(aWasPermittingSubpixelAA) {}
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Float mOpacity;
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cairo_pattern_t* mMaskPattern;
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bool mWasPermittingSubpixelAA;
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};
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std::vector<PushedLayer> mPushedLayers;
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// The latest snapshot of this surface. This needs to be told when this
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// target is modified. We keep it alive as a cache.
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RefPtr<SourceSurfaceCairo> mSnapshot;
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static cairo_surface_t* mDummySurface;
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};
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} // namespace gfx
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} // namespace mozilla
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#endif // _MOZILLA_GFX_DRAWTARGET_CAIRO_H_
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