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+/* -*- 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_