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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 GrSRGBEffect_DEFINED
#define GrSRGBEffect_DEFINED
#include "GrFragmentProcessor.h"
class GrSRGBEffect : public GrFragmentProcessor {
public:
enum class Mode {
kLinearToSRGB,
kSRGBToLinear,
};
enum class Alpha {
kPremul,
kOpaque,
};
/**
* Creates an effect that applies the sRGB transfer function (or its inverse)
*/
static std::unique_ptr<GrFragmentProcessor> Make(Mode mode, Alpha alpha) {
return std::unique_ptr<GrFragmentProcessor>(new GrSRGBEffect(mode, alpha));
}
const char* name() const override { return "sRGB"; }
Mode mode() const { return fMode; }
Alpha alpha() const { return fAlpha; }
std::unique_ptr<GrFragmentProcessor> clone() const override;
private:
GrSRGBEffect(Mode mode, Alpha);
GrGLSLFragmentProcessor* onCreateGLSLInstance() const override;
void onGetGLSLProcessorKey(const GrShaderCaps&, GrProcessorKeyBuilder*) const override;
bool onIsEqual(const GrFragmentProcessor&) const override;
GrColor4f constantOutputForConstantInput(GrColor4f input) const override;
Mode fMode;
Alpha fAlpha;
GR_DECLARE_FRAGMENT_PROCESSOR_TEST
typedef GrFragmentProcessor INHERITED;
};
#endif
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