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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 SkArithmeticMode_gpu_DEFINED
#define SkArithmeticMode_gpu_DEFINED
#include "SkTypes.h"
#if SK_SUPPORT_GPU
#include "GrCoordTransform.h"
#include "GrDrawTargetCaps.h"
#include "GrFragmentProcessor.h"
#include "GrTextureAccess.h"
#include "GrTypes.h"
#include "GrXferProcessor.h"
class GrInvariantOutput;
class GrProcOptInfo;
class GrTexture;
///////////////////////////////////////////////////////////////////////////////
// Fragment Processor
///////////////////////////////////////////////////////////////////////////////
class GrGLArtithmeticFP;
class GrArithmeticFP : public GrFragmentProcessor {
public:
static GrFragmentProcessor* Create(float k1, float k2, float k3, float k4, bool enforcePMColor,
GrTexture* background) {
return SkNEW_ARGS(GrArithmeticFP, (k1, k2, k3, k4, enforcePMColor, background));
}
~GrArithmeticFP() SK_OVERRIDE {};
const char* name() const SK_OVERRIDE { return "Arithmetic"; }
void getGLProcessorKey(const GrGLCaps& caps, GrProcessorKeyBuilder* b) const SK_OVERRIDE;
GrGLFragmentProcessor* createGLInstance() const SK_OVERRIDE;
float k1() const { return fK1; }
float k2() const { return fK2; }
float k3() const { return fK3; }
float k4() const { return fK4; }
bool enforcePMColor() const { return fEnforcePMColor; }
private:
bool onIsEqual(const GrFragmentProcessor&) const SK_OVERRIDE;
void onComputeInvariantOutput(GrInvariantOutput* inout) const SK_OVERRIDE;
GrArithmeticFP(float k1, float k2, float k3, float k4, bool enforcePMColor,
GrTexture* background);
float fK1, fK2, fK3, fK4;
bool fEnforcePMColor;
GrCoordTransform fBackgroundTransform;
GrTextureAccess fBackgroundAccess;
GR_DECLARE_FRAGMENT_PROCESSOR_TEST;
typedef GrFragmentProcessor INHERITED;
};
///////////////////////////////////////////////////////////////////////////////
// Xfer Processor
///////////////////////////////////////////////////////////////////////////////
class GrArithmeticXPFactory : public GrXPFactory {
public:
static GrXPFactory* Create(float k1, float k2, float k3, float k4, bool enforcePMColor) {
return SkNEW_ARGS(GrArithmeticXPFactory, (k1, k2, k3, k4, enforcePMColor));
}
bool supportsRGBCoverage(GrColor knownColor, uint32_t knownColorFlags) const SK_OVERRIDE {
return true;
}
bool canApplyCoverage(const GrProcOptInfo& colorPOI,
const GrProcOptInfo& coveragePOI) const SK_OVERRIDE {
return true;
}
bool canTweakAlphaForCoverage() const SK_OVERRIDE {
return false;
}
void getInvariantOutput(const GrProcOptInfo& colorPOI, const GrProcOptInfo& coveragePOI,
GrXPFactory::InvariantOutput*) const SK_OVERRIDE;
private:
GrArithmeticXPFactory(float k1, float k2, float k3, float k4, bool enforcePMColor);
GrXferProcessor* onCreateXferProcessor(const GrDrawTargetCaps& caps,
const GrProcOptInfo& colorPOI,
const GrProcOptInfo& coveragePOI,
const GrDeviceCoordTexture* dstCopy) const SK_OVERRIDE;
bool willReadDstColor(const GrDrawTargetCaps& caps,
const GrProcOptInfo& colorPOI,
const GrProcOptInfo& coveragePOI) const SK_OVERRIDE {
return true;
}
bool onIsEqual(const GrXPFactory& xpfBase) const SK_OVERRIDE {
const GrArithmeticXPFactory& xpf = xpfBase.cast<GrArithmeticXPFactory>();
if (fK1 != xpf.fK1 ||
fK2 != xpf.fK2 ||
fK3 != xpf.fK3 ||
fK4 != xpf.fK4 ||
fEnforcePMColor != xpf.fEnforcePMColor) {
return false;
}
return true;
}
GR_DECLARE_XP_FACTORY_TEST;
float fK1, fK2, fK3, fK4;
bool fEnforcePMColor;
typedef GrXPFactory INHERITED;
};
#endif
#endif
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