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/*
* Copyright 2006 The Android Open Source Project
*
* Use of this source code is governed by a BSD-style license that can be
* found in the LICENSE file.
*/
#ifndef SkLayerRasterizer_DEFINED
#define SkLayerRasterizer_DEFINED
#include "SkRasterizer.h"
#include "SkDeque.h"
#include "SkScalar.h"
class SkPaint;
class SkLayerRasterizer : public SkRasterizer {
public:
SkLayerRasterizer();
virtual ~SkLayerRasterizer();
void addLayer(const SkPaint& paint) {
this->addLayer(paint, 0, 0);
}
/** Add a new layer (above any previous layers) to the rasterizer.
The layer will extract those fields that affect the mask from
the specified paint, but will not retain a reference to the paint
object itself, so it may be reused without danger of side-effects.
*/
void addLayer(const SkPaint& paint, SkScalar dx, SkScalar dy);
// overrides from SkFlattenable
virtual void flatten(SkFlattenableWriteBuffer&);
SK_DECLARE_PUBLIC_FLATTENABLE_DESERIALIZATION_PROCS(SkLayerRasterizer)
protected:
SkLayerRasterizer(SkFlattenableReadBuffer&);
// override from SkRasterizer
virtual bool onRasterize(const SkPath& path, const SkMatrix& matrix,
const SkIRect* clipBounds,
SkMask* mask, SkMask::CreateMode mode);
private:
SkDeque fLayers;
typedef SkRasterizer INHERITED;
};
#endif
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