зеркало из https://github.com/mozilla/gecko-dev.git
241 строка
9.5 KiB
C++
241 строка
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() {}
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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, const Color &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 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 GetGlyphRasterizationMetrics(
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ScaledFont *aScaledFont, const uint16_t *aGlyphIndices,
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uint32_t aNumGlyphs, GlyphMetrics *aGlyphMetrics) 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 32767; }
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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();
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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();
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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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