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+/* -*- 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_ */