michael@0: /* -*- Mode: C++; tab-width: 20; indent-tabs-mode: nil; c-basic-offset: 2 -*-
michael@0:   * This Source Code Form is subject to the terms of the Mozilla Public
michael@0:  * License, v. 2.0. If a copy of the MPL was not distributed with this
michael@0:  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
michael@0:      
michael@0: #ifndef MOZILLA_GFX_DRAWTARGETDUAL_H_
michael@0: #define MOZILLA_GFX_DRAWTARGETDUAL_H_
michael@0:      
michael@0: #include <vector>
michael@0: #include <sstream>
michael@0: 
michael@0: #include "SourceSurfaceDual.h"
michael@0:      
michael@0: #include "2D.h"
michael@0: #include "Filters.h"
michael@0:      
michael@0: namespace mozilla {
michael@0: namespace gfx {
michael@0:      
michael@0: #define FORWARD_FUNCTION(funcName) \
michael@0:   virtual void funcName() { mA->funcName(); mB->funcName(); }
michael@0: #define FORWARD_FUNCTION1(funcName, var1Type, var1Name) \
michael@0:   virtual void funcName(var1Type var1Name) { mA->funcName(var1Name); mB->funcName(var1Name); }
michael@0: 
michael@0: /* This is a special type of DrawTarget. It duplicates all drawing calls
michael@0:  * accross two drawtargets. An exception to this is when a snapshot of another
michael@0:  * dual DrawTarget is used as the source for any surface data. In this case
michael@0:  * the snapshot of the first source DrawTarget is used as a source for the call
michael@0:  * to the first destination DrawTarget (mA) and the snapshot of the second
michael@0:  * source DrawTarget is used at the source for the second destination
michael@0:  * DrawTarget (mB). This class facilitates black-background/white-background
michael@0:  * drawing for per-component alpha extraction for backends which do not support
michael@0:  * native component alpha.
michael@0:  */
michael@0: class DrawTargetDual : public DrawTarget
michael@0: {
michael@0: public:
michael@0:   MOZ_DECLARE_REFCOUNTED_VIRTUAL_TYPENAME(DrawTargetDual)
michael@0:   DrawTargetDual(DrawTarget *aA, DrawTarget *aB)
michael@0:     : mA(aA)
michael@0:     , mB(aB)
michael@0:   { 
michael@0:     mFormat = aA->GetFormat();
michael@0:   }
michael@0:      
michael@0:   virtual BackendType GetType() const { return mA->GetType(); }
michael@0:   virtual TemporaryRef<SourceSurface> Snapshot() { return new SourceSurfaceDual(mA, mB); }
michael@0:   virtual IntSize GetSize() { return mA->GetSize(); }
michael@0:      
michael@0:   FORWARD_FUNCTION(Flush)
michael@0:   FORWARD_FUNCTION1(PushClip, const Path *, aPath)
michael@0:   FORWARD_FUNCTION1(PushClipRect, const Rect &, aRect)
michael@0:   FORWARD_FUNCTION(PopClip)
michael@0:   FORWARD_FUNCTION1(ClearRect, const Rect &, aRect)
michael@0: 
michael@0:   virtual void SetTransform(const Matrix &aTransform) {
michael@0:     mTransform = aTransform;
michael@0:     mA->SetTransform(aTransform);
michael@0:     mB->SetTransform(aTransform);
michael@0:   }
michael@0: 
michael@0:   virtual void DrawSurface(SourceSurface *aSurface, const Rect &aDest, const Rect & aSource,
michael@0:                            const DrawSurfaceOptions &aSurfOptions, const DrawOptions &aOptions);
michael@0: 
michael@0:   virtual void DrawFilter(FilterNode *aNode,
michael@0:                           const Rect &aSourceRect,
michael@0:                           const Point &aDestPoint,
michael@0:                           const DrawOptions &aOptions = DrawOptions())
michael@0:   {
michael@0:     mA->DrawFilter(aNode, aSourceRect, aDestPoint, aOptions);
michael@0:     mB->DrawFilter(aNode, aSourceRect, aDestPoint, aOptions);
michael@0:   }
michael@0: 
michael@0:   virtual void MaskSurface(const Pattern &aSource,
michael@0:                            SourceSurface *aMask,
michael@0:                            Point aOffset,
michael@0:                            const DrawOptions &aOptions = DrawOptions());
michael@0: 
michael@0:   virtual void DrawSurfaceWithShadow(SourceSurface *aSurface, const Point &aDest,
michael@0:                                      const Color &aColor, const Point &aOffset,
michael@0:                                      Float aSigma, CompositionOp aOp);
michael@0: 
michael@0:   virtual void CopySurface(SourceSurface *aSurface, const IntRect &aSourceRect,
michael@0:                            const IntPoint &aDestination);
michael@0: 
michael@0:   virtual void FillRect(const Rect &aRect, const Pattern &aPattern, const DrawOptions &aOptions);
michael@0: 
michael@0:   virtual void StrokeRect(const Rect &aRect, const Pattern &aPattern,
michael@0:                           const StrokeOptions &aStrokeOptions, const DrawOptions &aOptions);
michael@0: 
michael@0:   virtual void StrokeLine(const Point &aStart, const Point &aEnd, const Pattern &aPattern,
michael@0:                           const StrokeOptions &aStrokeOptions, const DrawOptions &aOptions);
michael@0: 
michael@0:   virtual void Stroke(const Path *aPath, const Pattern &aPattern,
michael@0:                       const StrokeOptions &aStrokeOptions, const DrawOptions &aOptions);
michael@0: 
michael@0:   virtual void Fill(const Path *aPath, const Pattern &aPattern, const DrawOptions &aOptions);
michael@0: 
michael@0:   virtual void FillGlyphs(ScaledFont *aScaledFont, const GlyphBuffer &aBuffer,
michael@0:                           const Pattern &aPattern, const DrawOptions &aOptions,
michael@0:                           const GlyphRenderingOptions *aRenderingOptions);
michael@0:   
michael@0:   virtual void Mask(const Pattern &aSource, const Pattern &aMask, const DrawOptions &aOptions);
michael@0:      
michael@0:   virtual TemporaryRef<SourceSurface>
michael@0:     CreateSourceSurfaceFromData(unsigned char *aData,
michael@0:                                 const IntSize &aSize,
michael@0:                                 int32_t aStride,
michael@0:                                 SurfaceFormat aFormat) const
michael@0:   {
michael@0:     return mA->CreateSourceSurfaceFromData(aData, aSize, aStride, aFormat);
michael@0:   }
michael@0:      
michael@0:   virtual TemporaryRef<SourceSurface> OptimizeSourceSurface(SourceSurface *aSurface) const
michael@0:   {
michael@0:     return mA->OptimizeSourceSurface(aSurface);
michael@0:   }
michael@0:      
michael@0:   virtual TemporaryRef<SourceSurface>
michael@0:     CreateSourceSurfaceFromNativeSurface(const NativeSurface &aSurface) const
michael@0:   {
michael@0:     return mA->CreateSourceSurfaceFromNativeSurface(aSurface);
michael@0:   }
michael@0:      
michael@0:   virtual TemporaryRef<DrawTarget>
michael@0:     CreateSimilarDrawTarget(const IntSize &aSize, SurfaceFormat aFormat) const;
michael@0:      
michael@0:   virtual TemporaryRef<PathBuilder> CreatePathBuilder(FillRule aFillRule = FillRule::FILL_WINDING) const
michael@0:   {
michael@0:     return mA->CreatePathBuilder(aFillRule);
michael@0:   }
michael@0:      
michael@0:   virtual TemporaryRef<GradientStops>
michael@0:     CreateGradientStops(GradientStop *aStops,
michael@0:                         uint32_t aNumStops,
michael@0:                         ExtendMode aExtendMode = ExtendMode::CLAMP) const
michael@0:   {
michael@0:     return mA->CreateGradientStops(aStops, aNumStops, aExtendMode);
michael@0:   }
michael@0: 
michael@0:   virtual TemporaryRef<FilterNode> CreateFilter(FilterType aType)
michael@0:   {
michael@0:     return mA->CreateFilter(aType);
michael@0:   }
michael@0: 
michael@0:   virtual void *GetNativeSurface(NativeSurfaceType aType)
michael@0:   {
michael@0:     return nullptr;
michael@0:   }
michael@0: 
michael@0:   virtual bool IsDualDrawTarget()
michael@0:   {
michael@0:     return true;
michael@0:   }
michael@0:      
michael@0: private:
michael@0:   RefPtr<DrawTarget> mA;
michael@0:   RefPtr<DrawTarget> mB;
michael@0: };
michael@0:      
michael@0: }
michael@0: }
michael@0:      
michael@0: #endif /* MOZILLA_GFX_DRAWTARGETDUAL_H_ */