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+/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* vim: set ts=8 sts=2 et sw=2 tw=80: */
+/* 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, override)
+
+ 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() = default;
+
+ const std::vector<GradientStop>& GetStops() const { return mStops; }
+
+ ExtendMode GetExtendMode() const { return mExtendMode; }
+
+ virtual BackendType GetBackendType() const override {
+ 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 BorrowedXlibDrawable;
+
+ DrawTargetCairo();
+ virtual ~DrawTargetCairo();
+
+ virtual bool IsValid() const override;
+ virtual DrawTargetType GetType() const override;
+ virtual BackendType GetBackendType() const override {
+ return BackendType::CAIRO;
+ }
+
+ virtual void Link(const char* aDestination, const Rect& aRect) override;
+ virtual void Destination(const char* aDestination,
+ const Point& aPoint) override;
+
+ virtual already_AddRefed<SourceSurface> Snapshot() override;
+ virtual IntSize GetSize() const 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 ShadowOptions& aShadow,
+ 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) 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 PushLayerWithBlend(
+ bool aOpaque, Float aOpacity, SourceSurface* aMask,
+ const Matrix& aMaskTransform, const IntRect& aBounds = IntRect(),
+ bool aCopyBackground = false,
+ CompositionOp = CompositionOp::OP_OVER) override;
+ virtual void PopLayer() override;
+
+ virtual already_AddRefed<PathBuilder> CreatePathBuilder(
+ FillRule aFillRule = FillRule::FILL_WINDING) const override {
+ return PathBuilderCairo::Create(aFillRule);
+ }
+
+ 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 RefPtr<DrawTarget> CreateClippedDrawTarget(
+ const Rect& aBounds, SurfaceFormat aFormat) 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* 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 32766; }
+
+ 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() const;
+
+ // 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(cairo_antialias_t aAAMode = CAIRO_ANTIALIAS_DEFAULT);
+
+ 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, CompositionOp aCompositionOp,
+ bool aWasPermittingSubpixelAA)
+ : mOpacity(aOpacity),
+ mCompositionOp(aCompositionOp),
+ mMaskPattern(nullptr),
+ mWasPermittingSubpixelAA(aWasPermittingSubpixelAA) {}
+ Float mOpacity;
+ CompositionOp mCompositionOp;
+ 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_