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Diffstat (limited to 'gfx/2d/DrawTargetCairo.h')
| -rw-r--r-- | gfx/2d/DrawTargetCairo.h | 262 |
1 files changed, 262 insertions, 0 deletions
diff --git a/gfx/2d/DrawTargetCairo.h b/gfx/2d/DrawTargetCairo.h new file mode 100644 index 000000000..bd0415b06 --- /dev/null +++ b/gfx/2d/DrawTargetCairo.h @@ -0,0 +1,262 @@ +/* -*- Mode: C++; tab-width: 20; indent-tabs-mode: nil; c-basic-offset: 2 -*- + * 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/. */ + +#ifndef _MOZILLA_GFX_DRAWTARGET_CAIRO_H_ +#define _MOZILLA_GFX_DRAWTARGET_CAIRO_H_ + +#include "2D.h" +#include "cairo.h" +#include "PathCairo.h" + +#include <vector> + +namespace mozilla { +namespace gfx { + +class SourceSurfaceCairo; + +class GradientStopsCairo : public GradientStops +{ + public: + MOZ_DECLARE_REFCOUNTED_VIRTUAL_TYPENAME(GradientStopsCairo) + GradientStopsCairo(GradientStop* aStops, uint32_t aNumStops, + ExtendMode aExtendMode) + : mExtendMode(aExtendMode) + { + for (uint32_t i = 0; i < aNumStops; ++i) { + mStops.push_back(aStops[i]); + } + } + + virtual ~GradientStopsCairo() {} + + const std::vector<GradientStop>& GetStops() const + { + return mStops; + } + + ExtendMode GetExtendMode() const + { + return mExtendMode; + } + + virtual BackendType GetBackendType() const { return BackendType::CAIRO; } + + private: + std::vector<GradientStop> mStops; + ExtendMode mExtendMode; +}; + +class DrawTargetCairo final : public DrawTarget +{ +public: + MOZ_DECLARE_REFCOUNTED_VIRTUAL_TYPENAME(DrawTargetCairo, override) + friend class BorrowedCairoContext; + friend class BorrowedXlibDrawable; + + DrawTargetCairo(); + virtual ~DrawTargetCairo(); + + virtual bool IsValid() const override; + virtual DrawTargetType GetType() const override; + virtual BackendType GetBackendType() const override { return BackendType::CAIRO; } + virtual already_AddRefed<SourceSurface> Snapshot() override; + virtual IntSize GetSize() override; + + virtual bool IsCurrentGroupOpaque() override; + + virtual void SetPermitSubpixelAA(bool aPermitSubpixelAA) override; + + virtual bool LockBits(uint8_t** aData, IntSize* aSize, + int32_t* aStride, SurfaceFormat* aFormat, + IntPoint* aOrigin = nullptr) override; + virtual void ReleaseBits(uint8_t* aData) override; + + virtual void Flush() override; + virtual void DrawSurface(SourceSurface *aSurface, + const Rect &aDest, + const Rect &aSource, + const DrawSurfaceOptions &aSurfOptions = DrawSurfaceOptions(), + const DrawOptions &aOptions = DrawOptions()) override; + virtual void DrawFilter(FilterNode *aNode, + const Rect &aSourceRect, + const Point &aDestPoint, + const DrawOptions &aOptions = DrawOptions()) override; + virtual void DrawSurfaceWithShadow(SourceSurface *aSurface, + const Point &aDest, + const Color &aColor, + const Point &aOffset, + Float aSigma, + CompositionOp aOperator) override; + + virtual void ClearRect(const Rect &aRect) override; + + virtual void CopySurface(SourceSurface *aSurface, + const IntRect &aSourceRect, + const IntPoint &aDestination) override; + virtual void CopyRect(const IntRect &aSourceRect, + const IntPoint &aDestination) override; + + virtual void FillRect(const Rect &aRect, + const Pattern &aPattern, + const DrawOptions &aOptions = DrawOptions()) override; + virtual void StrokeRect(const Rect &aRect, + const Pattern &aPattern, + const StrokeOptions &aStrokeOptions = StrokeOptions(), + const DrawOptions &aOptions = DrawOptions()) override; + virtual void StrokeLine(const Point &aStart, + const Point &aEnd, + const Pattern &aPattern, + const StrokeOptions &aStrokeOptions = StrokeOptions(), + const DrawOptions &aOptions = DrawOptions()) override; + + virtual void Stroke(const Path *aPath, + const Pattern &aPattern, + const StrokeOptions &aStrokeOptions = StrokeOptions(), + const DrawOptions &aOptions = DrawOptions()) override; + + virtual void Fill(const Path *aPath, + const Pattern &aPattern, + const DrawOptions &aOptions = DrawOptions()) override; + + virtual void FillGlyphs(ScaledFont *aFont, + const GlyphBuffer &aBuffer, + const Pattern &aPattern, + const DrawOptions &aOptions, + const GlyphRenderingOptions *aRenderingOptions = nullptr) override; + virtual void Mask(const Pattern &aSource, + const Pattern &aMask, + const DrawOptions &aOptions = DrawOptions()) override; + virtual void MaskSurface(const Pattern &aSource, + SourceSurface *aMask, + Point aOffset, + const DrawOptions &aOptions = DrawOptions()) override; + + virtual bool Draw3DTransformedSurface(SourceSurface* aSurface, + const Matrix4x4& aMatrix) override; + + virtual void PushClip(const Path *aPath) override; + virtual void PushClipRect(const Rect &aRect) override; + virtual void PopClip() override; + virtual void PushLayer(bool aOpaque, Float aOpacity, + SourceSurface* aMask, + const Matrix& aMaskTransform, + const IntRect& aBounds = IntRect(), + bool aCopyBackground = false) override; + virtual void PopLayer() override; + + virtual already_AddRefed<PathBuilder> CreatePathBuilder(FillRule aFillRule = FillRule::FILL_WINDING) const override; + + virtual already_AddRefed<SourceSurface> CreateSourceSurfaceFromData(unsigned char *aData, + const IntSize &aSize, + int32_t aStride, + SurfaceFormat aFormat) const override; + virtual already_AddRefed<SourceSurface> OptimizeSourceSurface(SourceSurface *aSurface) const override; + virtual already_AddRefed<SourceSurface> + CreateSourceSurfaceFromNativeSurface(const NativeSurface &aSurface) const override; + virtual already_AddRefed<DrawTarget> + CreateSimilarDrawTarget(const IntSize &aSize, SurfaceFormat aFormat) const override; + virtual already_AddRefed<DrawTarget> + CreateShadowDrawTarget(const IntSize &aSize, SurfaceFormat aFormat, + float aSigma) const override; + + virtual already_AddRefed<GradientStops> + CreateGradientStops(GradientStop *aStops, + uint32_t aNumStops, + ExtendMode aExtendMode = ExtendMode::CLAMP) const override; + + virtual already_AddRefed<FilterNode> CreateFilter(FilterType aType) override; + + virtual void GetGlyphRasterizationMetrics(ScaledFont *aScaledFont, const uint16_t* aGlyphIndices, + uint32_t aNumGlyphs, GlyphMetrics* aGlyphMetrics) override; + + virtual void *GetNativeSurface(NativeSurfaceType aType) override; + + bool Init(cairo_surface_t* aSurface, const IntSize& aSize, SurfaceFormat* aFormat = nullptr); + bool Init(const IntSize& aSize, SurfaceFormat aFormat); + bool Init(unsigned char* aData, const IntSize &aSize, int32_t aStride, SurfaceFormat aFormat); + + virtual void SetTransform(const Matrix& aTransform) override; + + virtual void DetachAllSnapshots() override { MarkSnapshotIndependent(); } + + // Call to set up aContext for drawing (with the current transform, etc). + // Pass the path you're going to be using if you have one. + // Implicitly calls WillChange(aPath). + void PrepareForDrawing(cairo_t* aContext, const Path* aPath = nullptr); + + static cairo_surface_t *GetDummySurface(); + + // Cairo hardcodes this as its maximum surface size. + static size_t GetMaxSurfaceSize() { + return 32767; + } + +private: // methods + // Init cairo surface without doing a cairo_surface_reference() call. + bool InitAlreadyReferenced(cairo_surface_t* aSurface, const IntSize& aSize, SurfaceFormat* aFormat = nullptr); + enum DrawPatternType { DRAW_FILL, DRAW_STROKE }; + void DrawPattern(const Pattern& aPattern, + const StrokeOptions& aStrokeOptions, + const DrawOptions& aOptions, + DrawPatternType aDrawType, + bool aPathBoundsClip = false); + + void CopySurfaceInternal(cairo_surface_t* aSurface, + const IntRect& aSource, + const IntPoint& aDest); + + Rect GetUserSpaceClip(); + + // Call before you make any changes to the backing surface with which this + // context is associated. Pass the path you're going to be using if you have + // one. + void WillChange(const Path* aPath = nullptr); + + // Call if there is any reason to disassociate the snapshot from this draw + // target; for example, because we're going to be destroyed. + void MarkSnapshotIndependent(); + + // If the current operator is "source" then clear the destination before we + // draw into it, to simulate the effect of an unbounded source operator. + void ClearSurfaceForUnboundedSource(const CompositionOp &aOperator); + + // Set the Cairo context font options according to the current draw target + // font state. + void SetFontOptions(); + +private: // data + cairo_t* mContext; + cairo_surface_t* mSurface; + IntSize mSize; + bool mTransformSingular; + + uint8_t* mLockedBits; + + cairo_font_options_t* mFontOptions; + + struct PushedLayer + { + PushedLayer(Float aOpacity, bool aWasPermittingSubpixelAA) + : mOpacity(aOpacity) + , mMaskPattern(nullptr) + , mWasPermittingSubpixelAA(aWasPermittingSubpixelAA) + {} + Float mOpacity; + cairo_pattern_t* mMaskPattern; + bool mWasPermittingSubpixelAA; + }; + std::vector<PushedLayer> mPushedLayers; + + // The latest snapshot of this surface. This needs to be told when this + // target is modified. We keep it alive as a cache. + RefPtr<SourceSurfaceCairo> mSnapshot; + static cairo_surface_t *mDummySurface; +}; + +} // namespace gfx +} // namespace mozilla + +#endif // _MOZILLA_GFX_DRAWTARGET_CAIRO_H_ |