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/*
* Copyright 2016 Google Inc.
*
* Use of this source code is governed by a BSD-style license that can be
* found in the LICENSE file.
*/
#ifndef GrGLSLColorSpaceXformHelper_DEFINED
#define GrGLSLColorSpaceXformHelper_DEFINED
#include "GrColorSpaceXform.h"
#include "GrGLSLUniformHandler.h"
/**
* Helper class to assist with using GrColorSpaceXform within an FP. This manages all of the
* uniforms needed, and can be passed to shader builder functions to automatically generate the
* correct color space transformation code.
*/
class GrGLSLColorSpaceXformHelper : public SkNoncopyable {
public:
GrGLSLColorSpaceXformHelper() : fValid(false) {}
void emitCode(GrGLSLUniformHandler* uniformHandler, const GrColorSpaceXform* colorSpaceXform,
uint32_t visibility = kFragment_GrShaderFlag) {
SkASSERT(uniformHandler);
if (colorSpaceXform) {
fGamutXformVar = uniformHandler->addUniform(visibility, kMat44f_GrSLType,
kDefault_GrSLPrecision, "ColorXform");
fValid = true;
}
}
void setData(const GrGLSLProgramDataManager& pdman, const GrColorSpaceXform* colorSpaceXform) {
pdman.setSkMatrix44(fGamutXformVar, colorSpaceXform->srcToDst());
}
bool isValid() const { return fValid; }
GrGLSLProgramDataManager::UniformHandle const gamutXformUniform() { return fGamutXformVar; }
private:
GrGLSLProgramDataManager::UniformHandle fGamutXformVar;
bool fValid;
};
#endif
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