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Diffstat (limited to 'gfx/2d/DrawTargetDual.h')
| -rw-r--r-- | gfx/2d/DrawTargetDual.h | 178 |
1 files changed, 178 insertions, 0 deletions
diff --git a/gfx/2d/DrawTargetDual.h b/gfx/2d/DrawTargetDual.h new file mode 100644 index 000000000..190346e44 --- /dev/null +++ b/gfx/2d/DrawTargetDual.h @@ -0,0 +1,178 @@ +/* -*- 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_DRAWTARGETDUAL_H_ +#define MOZILLA_GFX_DRAWTARGETDUAL_H_ + +#include <vector> +#include <sstream> + +#include "SourceSurfaceDual.h" + +#include "2D.h" +#include "Filters.h" + +namespace mozilla { +namespace gfx { + +#define FORWARD_FUNCTION(funcName) \ + virtual void funcName() override { mA->funcName(); mB->funcName(); } +#define FORWARD_FUNCTION1(funcName, var1Type, var1Name) \ + virtual void funcName(var1Type var1Name) override { mA->funcName(var1Name); mB->funcName(var1Name); } + +/* This is a special type of DrawTarget. It duplicates all drawing calls + * accross two drawtargets. An exception to this is when a snapshot of another + * dual DrawTarget is used as the source for any surface data. In this case + * the snapshot of the first source DrawTarget is used as a source for the call + * to the first destination DrawTarget (mA) and the snapshot of the second + * source DrawTarget is used at the source for the second destination + * DrawTarget (mB). This class facilitates black-background/white-background + * drawing for per-component alpha extraction for backends which do not support + * native component alpha. + */ +class DrawTargetDual : public DrawTarget +{ +public: + MOZ_DECLARE_REFCOUNTED_VIRTUAL_TYPENAME(DrawTargetDual, override) + DrawTargetDual(DrawTarget *aA, DrawTarget *aB) + : mA(aA) + , mB(aB) + { + mFormat = aA->GetFormat(); + } + + virtual DrawTargetType GetType() const override { return mA->GetType(); } + virtual BackendType GetBackendType() const override { return mA->GetBackendType(); } + virtual already_AddRefed<SourceSurface> Snapshot() override { + return MakeAndAddRef<SourceSurfaceDual>(mA, mB); + } + virtual IntSize GetSize() override { return mA->GetSize(); } + + virtual void DetachAllSnapshots() override; + + FORWARD_FUNCTION(Flush) + FORWARD_FUNCTION1(PushClip, const Path *, aPath) + FORWARD_FUNCTION1(PushClipRect, const Rect &, aRect) + FORWARD_FUNCTION(PopClip) + FORWARD_FUNCTION(PopLayer) + FORWARD_FUNCTION1(ClearRect, const Rect &, aRect) + + virtual void SetTransform(const Matrix &aTransform) override { + mTransform = aTransform; + mA->SetTransform(aTransform); + mB->SetTransform(aTransform); + } + + virtual void DrawSurface(SourceSurface *aSurface, const Rect &aDest, const Rect & aSource, + const DrawSurfaceOptions &aSurfOptions, const DrawOptions &aOptions) override; + + virtual void DrawFilter(FilterNode *aNode, + const Rect &aSourceRect, + const Point &aDestPoint, + const DrawOptions &aOptions = DrawOptions()) override + { + mA->DrawFilter(aNode, aSourceRect, aDestPoint, aOptions); + mB->DrawFilter(aNode, aSourceRect, aDestPoint, aOptions); + } + + virtual void MaskSurface(const Pattern &aSource, + SourceSurface *aMask, + Point aOffset, + const DrawOptions &aOptions = DrawOptions()) override; + + virtual void DrawSurfaceWithShadow(SourceSurface *aSurface, const Point &aDest, + const Color &aColor, const Point &aOffset, + Float aSigma, CompositionOp aOp) override; + + virtual void CopySurface(SourceSurface *aSurface, const IntRect &aSourceRect, + const IntPoint &aDestination) override; + + virtual void FillRect(const Rect &aRect, const Pattern &aPattern, const DrawOptions &aOptions) override; + + virtual void StrokeRect(const Rect &aRect, const Pattern &aPattern, + const StrokeOptions &aStrokeOptions, const DrawOptions &aOptions) override; + + virtual void StrokeLine(const Point &aStart, const Point &aEnd, const Pattern &aPattern, + const StrokeOptions &aStrokeOptions, const DrawOptions &aOptions) override; + + virtual void Stroke(const Path *aPath, const Pattern &aPattern, + const StrokeOptions &aStrokeOptions, const DrawOptions &aOptions) override; + + virtual void Fill(const Path *aPath, const Pattern &aPattern, const DrawOptions &aOptions) override; + + virtual void FillGlyphs(ScaledFont *aScaledFont, const GlyphBuffer &aBuffer, + const Pattern &aPattern, const DrawOptions &aOptions, + const GlyphRenderingOptions *aRenderingOptions) override; + + virtual void Mask(const Pattern &aSource, const Pattern &aMask, const DrawOptions &aOptions) override; + + virtual void PushLayer(bool aOpaque, Float aOpacity, + SourceSurface* aMask, + const Matrix& aMaskTransform, + const IntRect& aBounds = IntRect(), + bool aCopyBackground = false) override; + + virtual already_AddRefed<SourceSurface> + CreateSourceSurfaceFromData(unsigned char *aData, + const IntSize &aSize, + int32_t aStride, + SurfaceFormat aFormat) const override + { + return mA->CreateSourceSurfaceFromData(aData, aSize, aStride, aFormat); + } + + virtual already_AddRefed<SourceSurface> OptimizeSourceSurface(SourceSurface *aSurface) const override + { + return mA->OptimizeSourceSurface(aSurface); + } + + virtual already_AddRefed<SourceSurface> + CreateSourceSurfaceFromNativeSurface(const NativeSurface &aSurface) const override + { + return mA->CreateSourceSurfaceFromNativeSurface(aSurface); + } + + virtual already_AddRefed<DrawTarget> + CreateSimilarDrawTarget(const IntSize &aSize, SurfaceFormat aFormat) const override; + + virtual already_AddRefed<PathBuilder> CreatePathBuilder(FillRule aFillRule = FillRule::FILL_WINDING) const override + { + return mA->CreatePathBuilder(aFillRule); + } + + virtual already_AddRefed<GradientStops> + CreateGradientStops(GradientStop *aStops, + uint32_t aNumStops, + ExtendMode aExtendMode = ExtendMode::CLAMP) const override + { + return mA->CreateGradientStops(aStops, aNumStops, aExtendMode); + } + + virtual already_AddRefed<FilterNode> CreateFilter(FilterType aType) override + { + return mA->CreateFilter(aType); + } + + virtual void *GetNativeSurface(NativeSurfaceType aType) override + { + return nullptr; + } + + virtual bool IsDualDrawTarget() const override + { + return true; + } + + virtual bool IsCurrentGroupOpaque() override { return mA->IsCurrentGroupOpaque(); } + +private: + RefPtr<DrawTarget> mA; + RefPtr<DrawTarget> mB; +}; + +} // namespace gfx +} // namespace mozilla + +#endif /* MOZILLA_GFX_DRAWTARGETDUAL_H_ */ |