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/*
* Copyright 2015 Google Inc.
*
* Use of this source code is governed by a BSD-style license that can be
* found in the LICENSE file.
*/
#ifndef GrCustomXfermodePriv_DEFINED
#define GrCustomXfermodePriv_DEFINED
#include "GrCaps.h"
#include "GrCoordTransform.h"
#include "GrFragmentProcessor.h"
#include "GrTextureAccess.h"
#include "GrXferProcessor.h"
#include "SkXfermode.h"
class GrGLCaps;
class GrGLFragmentProcessor;
class GrInvariantOutput;
class GrProcessorKeyBuilder;
class GrTexture;
///////////////////////////////////////////////////////////////////////////////
// Fragment Processor
///////////////////////////////////////////////////////////////////////////////
class GrCustomXferFP : public GrFragmentProcessor {
public:
GrCustomXferFP(GrProcessorDataManager*, SkXfermode::Mode mode, GrTexture* background);
const char* name() const override { return "Custom Xfermode"; }
SkXfermode::Mode mode() const { return fMode; }
const GrTextureAccess& backgroundAccess() const { return fBackgroundAccess; }
private:
GrGLFragmentProcessor* onCreateGLInstance() const override;
void onGetGLProcessorKey(const GrGLSLCaps& caps, GrProcessorKeyBuilder* b) const override;
bool onIsEqual(const GrFragmentProcessor& other) const override;
void onComputeInvariantOutput(GrInvariantOutput* inout) const override;
GR_DECLARE_FRAGMENT_PROCESSOR_TEST;
SkXfermode::Mode fMode;
GrCoordTransform fBackgroundTransform;
GrTextureAccess fBackgroundAccess;
typedef GrFragmentProcessor INHERITED;
};
///////////////////////////////////////////////////////////////////////////////
// Xfer Processor
///////////////////////////////////////////////////////////////////////////////
class GrCustomXPFactory : public GrXPFactory {
public:
GrCustomXPFactory(SkXfermode::Mode mode);
bool supportsRGBCoverage(GrColor knownColor, uint32_t knownColorFlags) const override {
return true;
}
void getInvariantBlendedColor(const GrProcOptInfo& colorPOI,
GrXPFactory::InvariantBlendedColor*) const override;
private:
GrXferProcessor* onCreateXferProcessor(const GrCaps& caps,
const GrProcOptInfo& colorPOI,
const GrProcOptInfo& coveragePOI,
bool hasMixedSamples,
const DstTexture*) const override;
bool willReadDstColor(const GrCaps& caps,
const GrProcOptInfo& colorPOI,
const GrProcOptInfo& coveragePOI,
bool hasMixedSamples) const override;
bool onIsEqual(const GrXPFactory& xpfBase) const override {
const GrCustomXPFactory& xpf = xpfBase.cast<GrCustomXPFactory>();
return fMode == xpf.fMode;
}
GR_DECLARE_XP_FACTORY_TEST;
SkXfermode::Mode fMode;
GrBlendEquation fHWBlendEquation;
typedef GrXPFactory INHERITED;
};
#endif
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