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/*
* Copyright 2012 Google Inc.
*
* Use of this source code is governed by a BSD-style license that can be
* found in the LICENSE file.
*/
#ifndef GrColorTableEffect_DEFINED
#define GrColorTableEffect_DEFINED
#include "GrSingleTextureEffect.h"
#include "GrTexture.h"
class GrGLColorTableEffect;
/**
* LUT-based color transformation effect. This class implements the Gr
* counterpart to the SkTable_ColorFilter effect. A 256 * 4 (single-channel)
* LUT is used to transform the input colors of the image.
*/
class GrColorTableEffect : public GrCustomStage {
public:
GrColorTableEffect(GrTexture* texture);
virtual ~GrColorTableEffect();
static const char* Name() { return "ColorTable"; }
virtual const GrProgramStageFactory& getFactory() const SK_OVERRIDE;
virtual bool isEqual(const GrCustomStage&) const SK_OVERRIDE;
virtual int numTextures() const SK_OVERRIDE { return 1; }
virtual const GrTextureAccess& textureAccess(int index) const SK_OVERRIDE;
typedef GrGLColorTableEffect GLProgramStage;
private:
GR_DECLARE_CUSTOM_STAGE_TEST;
GrTextureAccess fTextureAccess;
typedef GrCustomStage INHERITED;
};
#endif
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