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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 SkTransparentShader_DEFINED
#define SkTransparentShader_DEFINED
#include "SkShader.h"
class SkTransparentShader : public SkShader {
public:
SkTransparentShader() {}
virtual uint32_t getFlags();
virtual bool setContext( const SkBitmap& device,
const SkPaint& paint,
const SkMatrix& matrix);
virtual void shadeSpan(int x, int y, SkPMColor[], int count);
virtual void shadeSpan16(int x, int y, uint16_t span[], int count);
// overrides for SkFlattenable
virtual Factory getFactory() { return Create; }
virtual void flatten(SkFlattenableWriteBuffer& buffer) {
this->INHERITED::flatten(buffer);
}
private:
// these are a cache from the call to setContext()
const SkBitmap* fDevice;
uint8_t fAlpha;
SkTransparentShader(SkFlattenableReadBuffer& buffer) : INHERITED(buffer) {}
static SkFlattenable* Create(SkFlattenableReadBuffer& buffer) {
return SkNEW_ARGS(SkTransparentShader, (buffer));
}
typedef SkShader INHERITED;
};
#endif
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