Add m-esr52 at 52.6.0

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_