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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 GrAlphaThresholdFragmentProcessor_DEFINED
#define GrAlphaThresholdFragmentProcessor_DEFINED
#include "SkTypes.h"
#if SK_SUPPORT_GPU
#include "GrColorSpaceXform.h"
#include "GrCoordTransform.h"
#include "GrFragmentProcessor.h"
#include "GrProcessorUnitTest.h"
class GrAlphaThresholdFragmentProcessor : public GrFragmentProcessor {
public:
static sk_sp<GrFragmentProcessor> Make(GrTexture* texture,
sk_sp<GrColorSpaceXform> colorSpaceXform,
GrTexture* maskTexture,
float innerThreshold,
float outerThreshold,
const SkIRect& bounds);
const char* name() const override { return "Alpha Threshold"; }
float innerThreshold() const { return fInnerThreshold; }
float outerThreshold() const { return fOuterThreshold; }
GrColorSpaceXform* colorSpaceXform() const { return fColorSpaceXform.get(); }
private:
static OptimizationFlags OptFlags(float outerThreshold);
GrAlphaThresholdFragmentProcessor(GrTexture* texture,
sk_sp<GrColorSpaceXform> colorSpaceXform,
GrTexture* maskTexture,
float innerThreshold,
float outerThreshold,
const SkIRect& bounds);
GrGLSLFragmentProcessor* onCreateGLSLInstance() const override;
void onGetGLSLProcessorKey(const GrShaderCaps&, GrProcessorKeyBuilder*) const override;
bool onIsEqual(const GrFragmentProcessor&) const override;
void onComputeInvariantOutput(GrInvariantOutput* inout) const override;
GR_DECLARE_FRAGMENT_PROCESSOR_TEST;
float fInnerThreshold;
float fOuterThreshold;
GrCoordTransform fImageCoordTransform;
TextureSampler fImageTextureSampler;
// Color space transform is for the image (not the mask)
sk_sp<GrColorSpaceXform> fColorSpaceXform;
GrCoordTransform fMaskCoordTransform;
TextureSampler fMaskTextureSampler;
typedef GrFragmentProcessor INHERITED;
};
#endif
#endif
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