263 lines
10 KiB
C++
263 lines
10 KiB
C++
/* -*- Mode: C++; tab-width: 20; indent-tabs-mode: nil; c-basic-offset: 2 -*-
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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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{
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public:
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MOZ_DECLARE_REFCOUNTED_VIRTUAL_TYPENAME(GradientStopsCairo)
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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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{
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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
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{
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return mStops;
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}
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ExtendMode GetExtendMode() const
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{
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return mExtendMode;
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}
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virtual BackendType GetBackendType() const { return BackendType::CAIRO; }
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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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{
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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 { return BackendType::CAIRO; }
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virtual already_AddRefed<SourceSurface> Snapshot() override;
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virtual IntSize GetSize() 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,
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int32_t* aStride, 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(SourceSurface *aSurface,
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const Rect &aDest,
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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,
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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 Color &aColor,
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const Point &aOffset,
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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,
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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,
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const Pattern &aPattern,
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const DrawOptions &aOptions = DrawOptions()) override;
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virtual void StrokeRect(const Rect &aRect,
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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 StrokeLine(const Point &aStart,
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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,
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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 Fill(const Path *aPath,
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const Pattern &aPattern,
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const DrawOptions &aOptions = DrawOptions()) override;
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virtual void FillGlyphs(ScaledFont *aFont,
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const GlyphBuffer &aBuffer,
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const Pattern &aPattern,
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const DrawOptions &aOptions,
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const GlyphRenderingOptions *aRenderingOptions = nullptr) override;
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virtual void Mask(const Pattern &aSource,
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const Pattern &aMask,
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const DrawOptions &aOptions = DrawOptions()) override;
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virtual void MaskSurface(const Pattern &aSource,
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SourceSurface *aMask,
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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,
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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(FillRule aFillRule = FillRule::FILL_WINDING) const override;
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virtual already_AddRefed<SourceSurface> CreateSourceSurfaceFromData(unsigned char *aData,
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const IntSize &aSize,
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int32_t aStride,
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SurfaceFormat aFormat) const override;
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virtual already_AddRefed<SourceSurface> OptimizeSourceSurface(SourceSurface *aSurface) const override;
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virtual already_AddRefed<SourceSurface>
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CreateSourceSurfaceFromNativeSurface(const NativeSurface &aSurface) const override;
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virtual already_AddRefed<DrawTarget>
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CreateSimilarDrawTarget(const IntSize &aSize, SurfaceFormat aFormat) const override;
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virtual already_AddRefed<DrawTarget>
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CreateShadowDrawTarget(const IntSize &aSize, SurfaceFormat aFormat,
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float aSigma) const override;
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virtual already_AddRefed<GradientStops>
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CreateGradientStops(GradientStop *aStops,
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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(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, 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, 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() {
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return 32767;
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}
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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, SurfaceFormat* aFormat = nullptr);
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enum DrawPatternType { DRAW_FILL, DRAW_STROKE };
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void DrawPattern(const Pattern& aPattern,
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const StrokeOptions& aStrokeOptions,
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const DrawOptions& aOptions,
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DrawPatternType aDrawType,
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bool aPathBoundsClip = false);
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void CopySurfaceInternal(cairo_surface_t* aSurface,
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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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{
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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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{}
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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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