зеркало из https://github.com/mozilla/gecko-dev.git
139 строки
5.1 KiB
C++
139 строки
5.1 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_DRAWTARGETDUAL_H_
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#define MOZILLA_GFX_DRAWTARGETDUAL_H_
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#include <vector>
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#include <sstream>
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#include "SourceSurfaceDual.h"
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#include "2D.h"
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namespace mozilla {
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namespace gfx {
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#define FORWARD_FUNCTION(funcName) \
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virtual void funcName() { mA->funcName(); mB->funcName(); }
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#define FORWARD_FUNCTION1(funcName, var1Type, var1Name) \
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virtual void funcName(var1Type var1Name) { mA->funcName(var1Name); mB->funcName(var1Name); }
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/* This is a special type of DrawTarget. It duplicates all drawing calls
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* accross two drawtargets. An exception to this is when a snapshot of another
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* dual DrawTarget is used as the source for any surface data. In this case
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* the snapshot of the first source DrawTarget is used as a source for the call
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* to the first destination DrawTarget (mA) and the snapshot of the second
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* source DrawTarget is used at the source for the second destination
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* DrawTarget (mB). This class facilitates black-background/white-background
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* drawing for per-component alpha extraction for backends which do not support
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* native component alpha.
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*/
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class DrawTargetDual : public DrawTarget
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{
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public:
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DrawTargetDual(DrawTarget *aA, DrawTarget *aB)
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: mA(aA)
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, mB(aB)
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{
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mFormat = aA->GetFormat();
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}
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virtual BackendType GetType() const { return mA->GetType(); }
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virtual TemporaryRef<SourceSurface> Snapshot() { return new SourceSurfaceDual(mA, mB); }
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virtual IntSize GetSize() { return mA->GetSize(); }
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FORWARD_FUNCTION(Flush)
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FORWARD_FUNCTION1(PushClip, const Path *, aPath)
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FORWARD_FUNCTION1(PushClipRect, const Rect &, aRect)
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FORWARD_FUNCTION(PopClip)
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FORWARD_FUNCTION1(ClearRect, const Rect &, aRect)
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virtual void SetTransform(const Matrix &aTransform) {
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mTransform = aTransform;
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mA->SetTransform(aTransform);
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mB->SetTransform(aTransform);
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}
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virtual void DrawSurface(SourceSurface *aSurface, const Rect &aDest, const Rect & aSource,
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const DrawSurfaceOptions &aSurfOptions, const DrawOptions &aOptions);
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virtual void DrawSurfaceWithShadow(SourceSurface *aSurface, const Point &aDest,
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const Color &aColor, const Point &aOffset,
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Float aSigma, CompositionOp aOp);
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virtual void CopySurface(SourceSurface *aSurface, const IntRect &aSourceRect,
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const IntPoint &aDestination);
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virtual void FillRect(const Rect &aRect, const Pattern &aPattern, const DrawOptions &aOptions);
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virtual void StrokeRect(const Rect &aRect, const Pattern &aPattern,
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const StrokeOptions &aStrokeOptions, const DrawOptions &aOptions);
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virtual void StrokeLine(const Point &aStart, const Point &aEnd, const Pattern &aPattern,
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const StrokeOptions &aStrokeOptions, const DrawOptions &aOptions);
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virtual void Stroke(const Path *aPath, const Pattern &aPattern,
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const StrokeOptions &aStrokeOptions, const DrawOptions &aOptions);
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virtual void Fill(const Path *aPath, const Pattern &aPattern, const DrawOptions &aOptions);
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virtual void FillGlyphs(ScaledFont *aScaledFont, const GlyphBuffer &aBuffer,
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const Pattern &aPattern, const DrawOptions &aOptions,
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const GlyphRenderingOptions *aRenderingOptions);
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virtual void Mask(const Pattern &aSource, const Pattern &aMask, const DrawOptions &aOptions);
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virtual TemporaryRef<SourceSurface>
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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
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{
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return mA->CreateSourceSurfaceFromData(aData, aSize, aStride, aFormat);
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}
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virtual TemporaryRef<SourceSurface> OptimizeSourceSurface(SourceSurface *aSurface) const
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{
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return mA->OptimizeSourceSurface(aSurface);
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}
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virtual TemporaryRef<SourceSurface>
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CreateSourceSurfaceFromNativeSurface(const NativeSurface &aSurface) const
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{
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return mA->CreateSourceSurfaceFromNativeSurface(aSurface);
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}
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virtual TemporaryRef<DrawTarget>
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CreateSimilarDrawTarget(const IntSize &aSize, SurfaceFormat aFormat) const;
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virtual TemporaryRef<PathBuilder> CreatePathBuilder(FillRule aFillRule = FILL_WINDING) const
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{
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return mA->CreatePathBuilder(aFillRule);
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}
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virtual TemporaryRef<GradientStops>
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CreateGradientStops(GradientStop *aStops,
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uint32_t aNumStops,
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ExtendMode aExtendMode = EXTEND_CLAMP) const
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{
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return mA->CreateGradientStops(aStops, aNumStops, aExtendMode);
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}
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virtual void *GetNativeSurface(NativeSurfaceType aType)
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{
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return nullptr;
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}
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private:
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RefPtr<DrawTarget> mA;
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RefPtr<DrawTarget> mB;
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};
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}
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}
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#endif /* MOZILLA_GFX_DRAWTARGETDUAL_H_ */
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