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Diffstat (limited to 'src/gpu/effects/GrGammaEffect.h')
-rw-r--r-- | src/gpu/effects/GrGammaEffect.h | 42 |
1 files changed, 42 insertions, 0 deletions
diff --git a/src/gpu/effects/GrGammaEffect.h b/src/gpu/effects/GrGammaEffect.h new file mode 100644 index 0000000000..44d6d6707c --- /dev/null +++ b/src/gpu/effects/GrGammaEffect.h @@ -0,0 +1,42 @@ +/* + * 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 GrGammaEffect_DEFINED +#define GrGammaEffect_DEFINED + +#include "GrSingleTextureEffect.h" + +class GrGammaEffect : public GrSingleTextureEffect { +public: + /** + * Creates an effect that applies a gamma curve. The source texture is always + * sampled unfiltered and with clamping. + */ + static const GrFragmentProcessor* Create(GrTexture*, SkScalar gamma); + + const char* name() const override { return "Gamma"; } + + bool gammaIsSRGB() const { return fGammaIsSRGB; } + SkScalar gamma() const { return fGamma; } + +private: + GrGammaEffect(GrTexture*, SkScalar gamma); + + GrGLSLFragmentProcessor* onCreateGLSLInstance() const override; + void onGetGLSLProcessorKey(const GrGLSLCaps&, GrProcessorKeyBuilder*) const override; + bool onIsEqual(const GrFragmentProcessor&) const override; + void onComputeInvariantOutput(GrInvariantOutput* inout) const override; + + bool fGammaIsSRGB; + SkScalar fGamma; + + GR_DECLARE_FRAGMENT_PROCESSOR_TEST; + + typedef GrSingleTextureEffect INHERITED; +}; + +#endif |