gecko/gfx/skia/include/core/SkEmptyShader.h
2011-10-28 20:05:31 +13:00

42 lines
1001 B
C++

/*
* Copyright 2011 Google Inc.
*
* Use of this source code is governed by a BSD-style license that can be
* found in the LICENSE file.
*/
#ifndef SkEmptyShader_DEFINED
#define SkEmptyShader_DEFINED
#include "SkShader.h"
/**
* \class SkEmptyShader
* A Shader that always draws nothing.
*/
class SK_API SkEmptyShader : public SkShader {
public:
SkEmptyShader();
virtual uint32_t getFlags();
virtual uint8_t getSpan16Alpha() const;
virtual bool setContext(const SkBitmap& device, const SkPaint& paint,
const SkMatrix& matrix);
virtual void shadeSpan(int x, int y, SkPMColor span[], int count);
virtual void shadeSpan16(int x, int y, uint16_t span[], int count);
virtual void shadeSpanAlpha(int x, int y, uint8_t alpha[], int count);
protected:
SkEmptyShader(SkFlattenableReadBuffer&);
virtual Factory getFactory();
virtual void flatten(SkFlattenableWriteBuffer&);
private:
typedef SkShader INHERITED;
};
#endif