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/* include/graphics/SkLayerRasterizer.h
**
** Copyright 2006, Google Inc.
**
** Licensed under the Apache License, Version 2.0 (the "License");
** you may not use this file except in compliance with the License.
** You may obtain a copy of the License at
**
** http://www.apache.org/licenses/LICENSE-2.0
**
** Unless required by applicable law or agreed to in writing, software
** distributed under the License is distributed on an "AS IS" BASIS,
** WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
** See the License for the specific language governing permissions and
** limitations under the License.
*/
#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 Factory getFactory();
virtual void flatten(SkFlattenableWriteBuffer&);
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;
static SkFlattenable* CreateProc(SkFlattenableReadBuffer&);
typedef SkRasterizer INHERITED;
};
#endif
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