include/graphics/SkLayerRasterizer.h

/* 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);
    }
    void addLayer(const SkPaint& paint, SkScalar dx, SkScalar dy);

    // overrides from SkFlattenable
    virtual Factory getFactory();
    virtual void    flatten(SkWBuffer&);

protected:
    SkLayerRasterizer(SkRBuffer&);

    // override from SkRasterizer
    virtual bool onRasterize(const SkPath& path, const SkMatrix& matrix,
                             const SkRect16* clipBounds,
                             SkMask* mask, SkMask::CreateMode mode);

private:
    SkDeque fLayers;
    
    static SkFlattenable* CreateProc(SkRBuffer&);

    typedef SkRasterizer INHERITED;
};

#endif