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/*
* Copyright 2014 Google Inc.
*
* Use of this source code is governed by a BSD-style license that can be
* found in the LICENSE file.
*/
#include "GrPorterDuffXferProcessor.h"
#include "GrBackendProcessorFactory.h"
#include "GrDrawState.h"
#include "GrInvariantOutput.h"
#include "GrProcessor.h"
#include "GrTBackendProcessorFactory.h"
#include "GrTypes.h"
#include "GrXferProcessor.h"
#include "gl/GrGLProcessor.h"
#include "gl/builders/GrGLFragmentShaderBuilder.h"
#include "gl/builders/GrGLProgramBuilder.h"
class GrGLPorterDuffXferProcessor : public GrGLXferProcessor {
public:
GrGLPorterDuffXferProcessor(const GrBackendProcessorFactory& factory, const GrProcessor&)
: INHERITED(factory) {}
virtual ~GrGLPorterDuffXferProcessor() {}
virtual void emitCode(GrGLFPBuilder* builder,
const GrFragmentProcessor& fp,
const char* outputColor,
const char* inputColor,
const TransformedCoordsArray& coords,
const TextureSamplerArray& samplers) SK_OVERRIDE {
GrGLFPFragmentBuilder* fsBuilder = builder->getFragmentShaderBuilder();
fsBuilder->codeAppendf("%s = %s;", outputColor, inputColor);
}
virtual void setData(const GrGLProgramDataManager&, const GrProcessor&) SK_OVERRIDE {};
static void GenKey(const GrProcessor&, const GrGLCaps& caps, GrProcessorKeyBuilder* b) {};
private:
typedef GrGLXferProcessor INHERITED;
};
///////////////////////////////////////////////////////////////////////////////
GrPorterDuffXferProcessor::GrPorterDuffXferProcessor(GrBlendCoeff srcBlend, GrBlendCoeff dstBlend)
: fSrcBlend(srcBlend), fDstBlend(dstBlend) {}
GrPorterDuffXferProcessor::~GrPorterDuffXferProcessor() {
}
const GrBackendFragmentProcessorFactory& GrPorterDuffXferProcessor::getFactory() const {
return GrTBackendFragmentProcessorFactory<GrPorterDuffXferProcessor>::getInstance();
}
void GrPorterDuffXferProcessor::onComputeInvariantOutput(GrInvariantOutput* inout) const {
inout->setToUnknown(GrInvariantOutput::kWillNot_ReadInput);
}
///////////////////////////////////////////////////////////////////////////////
GrXPFactory* GrPorterDuffXPFactory::Create(SkXfermode::Mode mode) {
switch (mode) {
case SkXfermode::kClear_Mode: {
static GrPorterDuffXPFactory gClearPDXPF(kZero_GrBlendCoeff, kZero_GrBlendCoeff);
return SkRef(&gClearPDXPF);
break;
}
case SkXfermode::kSrc_Mode: {
static GrPorterDuffXPFactory gSrcPDXPF(kOne_GrBlendCoeff, kZero_GrBlendCoeff);
return SkRef(&gSrcPDXPF);
break;
}
case SkXfermode::kDst_Mode: {
static GrPorterDuffXPFactory gDstPDXPF(kZero_GrBlendCoeff, kOne_GrBlendCoeff);
return SkRef(&gDstPDXPF);
break;
}
case SkXfermode::kSrcOver_Mode: {
static GrPorterDuffXPFactory gSrcOverPDXPF(kOne_GrBlendCoeff, kISA_GrBlendCoeff);
return SkRef(&gSrcOverPDXPF);
break;
}
case SkXfermode::kDstOver_Mode: {
static GrPorterDuffXPFactory gDstOverPDXPF(kIDA_GrBlendCoeff, kOne_GrBlendCoeff);
return SkRef(&gDstOverPDXPF);
break;
}
case SkXfermode::kSrcIn_Mode: {
static GrPorterDuffXPFactory gSrcInPDXPF(kDA_GrBlendCoeff, kZero_GrBlendCoeff);
return SkRef(&gSrcInPDXPF);
break;
}
case SkXfermode::kDstIn_Mode: {
static GrPorterDuffXPFactory gDstInPDXPF(kZero_GrBlendCoeff, kSA_GrBlendCoeff);
return SkRef(&gDstInPDXPF);
break;
}
case SkXfermode::kSrcOut_Mode: {
static GrPorterDuffXPFactory gSrcOutPDXPF(kIDA_GrBlendCoeff, kZero_GrBlendCoeff);
return SkRef(&gSrcOutPDXPF);
break;
}
case SkXfermode::kDstOut_Mode: {
static GrPorterDuffXPFactory gDstOutPDXPF(kZero_GrBlendCoeff, kISA_GrBlendCoeff);
return SkRef(&gDstOutPDXPF);
break;
}
case SkXfermode::kSrcATop_Mode: {
static GrPorterDuffXPFactory gSrcATopPDXPF(kDA_GrBlendCoeff, kISA_GrBlendCoeff);
return SkRef(&gSrcATopPDXPF);
break;
}
case SkXfermode::kDstATop_Mode: {
static GrPorterDuffXPFactory gDstATopPDXPF(kIDA_GrBlendCoeff, kSA_GrBlendCoeff);
return SkRef(&gDstATopPDXPF);
break;
}
case SkXfermode::kXor_Mode: {
static GrPorterDuffXPFactory gXorPDXPF(kIDA_GrBlendCoeff, kISA_GrBlendCoeff);
return SkRef(&gXorPDXPF);
break;
}
case SkXfermode::kPlus_Mode: {
static GrPorterDuffXPFactory gPlusPDXPF(kOne_GrBlendCoeff, kOne_GrBlendCoeff);
return SkRef(&gPlusPDXPF);
break;
}
case SkXfermode::kModulate_Mode: {
static GrPorterDuffXPFactory gModulatePDXPF(kZero_GrBlendCoeff, kSC_GrBlendCoeff);
return SkRef(&gModulatePDXPF);
break;
}
case SkXfermode::kScreen_Mode: {
static GrPorterDuffXPFactory gScreenPDXPF(kOne_GrBlendCoeff, kISC_GrBlendCoeff);
return SkRef(&gScreenPDXPF);
break;
}
default:
return NULL;
}
}
const GrXferProcessor* GrPorterDuffXPFactory::createXferProcessor() const {
return GrPorterDuffXferProcessor::Create(fSrc, fDst);
}
bool GrPorterDuffXPFactory::supportsRGBCoverage(GrColor /*knownColor*/,
uint32_t knownColorFlags) const {
if (kOne_GrBlendCoeff == fSrc && kISA_GrBlendCoeff == fDst &&
kRGBA_GrColorComponentFlags == knownColorFlags) {
return true;
}
return false;
}
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