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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 "effects/GrCoverageSetOpXP.h"
#include "GrCaps.h"
#include "GrColor.h"
#include "GrProcessor.h"
#include "GrProcOptInfo.h"
#include "glsl/GrGLSLBlend.h"
#include "glsl/GrGLSLFragmentShaderBuilder.h"
#include "glsl/GrGLSLUniformHandler.h"
#include "glsl/GrGLSLXferProcessor.h"
class CoverageSetOpXP : public GrXferProcessor {
public:
static GrXferProcessor* Create(SkRegion::Op regionOp, bool invertCoverage) {
return new CoverageSetOpXP(regionOp, invertCoverage);
}
~CoverageSetOpXP() override;
const char* name() const override { return "Coverage Set Op"; }
GrGLSLXferProcessor* createGLSLInstance() const override;
bool invertCoverage() const { return fInvertCoverage; }
private:
CoverageSetOpXP(SkRegion::Op regionOp, bool fInvertCoverage);
GrXferProcessor::OptFlags onGetOptimizations(const GrPipelineOptimizations& optimizations,
bool doesStencilWrite,
GrColor* color,
const GrCaps& caps) const override;
void onGetGLSLProcessorKey(const GrGLSLCaps& caps, GrProcessorKeyBuilder* b) const override;
void onGetBlendInfo(GrXferProcessor::BlendInfo* blendInfo) const override;
bool onIsEqual(const GrXferProcessor& xpBase) const override {
const CoverageSetOpXP& xp = xpBase.cast<CoverageSetOpXP>();
return (fRegionOp == xp.fRegionOp &&
fInvertCoverage == xp.fInvertCoverage);
}
SkRegion::Op fRegionOp;
bool fInvertCoverage;
typedef GrXferProcessor INHERITED;
};
///////////////////////////////////////////////////////////////////////////////
class GLCoverageSetOpXP : public GrGLSLXferProcessor {
public:
GLCoverageSetOpXP(const GrProcessor&) {}
~GLCoverageSetOpXP() override {}
static void GenKey(const GrProcessor& processor, const GrGLSLCaps& caps,
GrProcessorKeyBuilder* b) {
const CoverageSetOpXP& xp = processor.cast<CoverageSetOpXP>();
uint32_t key = xp.invertCoverage() ? 0x0 : 0x1;
b->add32(key);
};
private:
void emitOutputsForBlendState(const EmitArgs& args) override {
const CoverageSetOpXP& xp = args.fXP.cast<CoverageSetOpXP>();
GrGLSLXPFragmentBuilder* fragBuilder = args.fXPFragBuilder;
if (xp.invertCoverage()) {
fragBuilder->codeAppendf("%s = 1.0 - %s;", args.fOutputPrimary, args.fInputCoverage);
} else {
fragBuilder->codeAppendf("%s = %s;", args.fOutputPrimary, args.fInputCoverage);
}
}
void onSetData(const GrGLSLProgramDataManager&, const GrXferProcessor&) override {};
typedef GrGLSLXferProcessor INHERITED;
};
///////////////////////////////////////////////////////////////////////////////
CoverageSetOpXP::CoverageSetOpXP(SkRegion::Op regionOp, bool invertCoverage)
: fRegionOp(regionOp)
, fInvertCoverage(invertCoverage) {
this->initClassID<CoverageSetOpXP>();
}
CoverageSetOpXP::~CoverageSetOpXP() {
}
void CoverageSetOpXP::onGetGLSLProcessorKey(const GrGLSLCaps& caps,
GrProcessorKeyBuilder* b) const {
GLCoverageSetOpXP::GenKey(*this, caps, b);
}
GrGLSLXferProcessor* CoverageSetOpXP::createGLSLInstance() const {
return new GLCoverageSetOpXP(*this);
}
GrXferProcessor::OptFlags
CoverageSetOpXP::onGetOptimizations(const GrPipelineOptimizations& optimizations,
bool doesStencilWrite,
GrColor* color,
const GrCaps& caps) const {
// We never look at the color input
return GrXferProcessor::kIgnoreColor_OptFlag;
}
void CoverageSetOpXP::onGetBlendInfo(GrXferProcessor::BlendInfo* blendInfo) const {
switch (fRegionOp) {
case SkRegion::kReplace_Op:
blendInfo->fSrcBlend = kOne_GrBlendCoeff;
blendInfo->fDstBlend = kZero_GrBlendCoeff;
break;
case SkRegion::kIntersect_Op:
blendInfo->fSrcBlend = kDC_GrBlendCoeff;
blendInfo->fDstBlend = kZero_GrBlendCoeff;
break;
case SkRegion::kUnion_Op:
blendInfo->fSrcBlend = kOne_GrBlendCoeff;
blendInfo->fDstBlend = kISC_GrBlendCoeff;
break;
case SkRegion::kXOR_Op:
blendInfo->fSrcBlend = kIDC_GrBlendCoeff;
blendInfo->fDstBlend = kISC_GrBlendCoeff;
break;
case SkRegion::kDifference_Op:
blendInfo->fSrcBlend = kZero_GrBlendCoeff;
blendInfo->fDstBlend = kISC_GrBlendCoeff;
break;
case SkRegion::kReverseDifference_Op:
blendInfo->fSrcBlend = kIDC_GrBlendCoeff;
blendInfo->fDstBlend = kZero_GrBlendCoeff;
break;
}
blendInfo->fBlendConstant = 0;
}
///////////////////////////////////////////////////////////////////////////////
class ShaderCSOXferProcessor : public GrXferProcessor {
public:
ShaderCSOXferProcessor(const DstTexture* dstTexture,
bool hasMixedSamples,
SkXfermode::Mode xfermode,
SkRegion::Op regionOp,
bool invertCoverage)
: INHERITED(dstTexture, true, hasMixedSamples)
, fRegionOp(regionOp)
, fInvertCoverage(invertCoverage) {
this->initClassID<ShaderCSOXferProcessor>();
}
const char* name() const override { return "Coverage Set Op Shader"; }
GrGLSLXferProcessor* createGLSLInstance() const override;
SkRegion::Op regionOp() const { return fRegionOp; }
bool invertCoverage() const { return fInvertCoverage; }
private:
GrXferProcessor::OptFlags onGetOptimizations(const GrPipelineOptimizations&, bool, GrColor*,
const GrCaps&) const override {
// We never look at the color input
return GrXferProcessor::kIgnoreColor_OptFlag;
}
void onGetGLSLProcessorKey(const GrGLSLCaps& caps, GrProcessorKeyBuilder* b) const override;
bool onIsEqual(const GrXferProcessor& xpBase) const override {
const ShaderCSOXferProcessor& xp = xpBase.cast<ShaderCSOXferProcessor>();
return (fRegionOp == xp.fRegionOp &&
fInvertCoverage == xp.fInvertCoverage);
}
SkRegion::Op fRegionOp;
bool fInvertCoverage;
typedef GrXferProcessor INHERITED;
};
///////////////////////////////////////////////////////////////////////////////
class GLShaderCSOXferProcessor : public GrGLSLXferProcessor {
public:
static void GenKey(const GrProcessor& processor, GrProcessorKeyBuilder* b) {
const ShaderCSOXferProcessor& xp = processor.cast<ShaderCSOXferProcessor>();
b->add32(xp.regionOp());
uint32_t key = xp.invertCoverage() ? 0x0 : 0x1;
b->add32(key);
}
private:
void emitBlendCodeForDstRead(GrGLSLXPFragmentBuilder* fragBuilder,
GrGLSLUniformHandler* uniformHandler,
const char* srcColor,
const char* srcCoverage,
const char* dstColor,
const char* outColor,
const char* outColorSecondary,
const GrXferProcessor& proc) override {
const ShaderCSOXferProcessor& xp = proc.cast<ShaderCSOXferProcessor>();
if (xp.invertCoverage()) {
fragBuilder->codeAppendf("%s = 1.0 - %s;", outColor, srcCoverage);
} else {
fragBuilder->codeAppendf("%s = %s;", outColor, srcCoverage);
}
GrGLSLBlend::AppendRegionOp(fragBuilder, outColor, dstColor, outColor, xp.regionOp());
}
void onSetData(const GrGLSLProgramDataManager&, const GrXferProcessor&) override {}
typedef GrGLSLXferProcessor INHERITED;
};
///////////////////////////////////////////////////////////////////////////////
void ShaderCSOXferProcessor::onGetGLSLProcessorKey(const GrGLSLCaps&,
GrProcessorKeyBuilder* b) const {
GLShaderCSOXferProcessor::GenKey(*this, b);
}
GrGLSLXferProcessor* ShaderCSOXferProcessor::createGLSLInstance() const {
return new GLShaderCSOXferProcessor;
}
///////////////////////////////////////////////////////////////////////////////
//
GrCoverageSetOpXPFactory::GrCoverageSetOpXPFactory(SkRegion::Op regionOp, bool invertCoverage)
: fRegionOp(regionOp)
, fInvertCoverage(invertCoverage) {
this->initClassID<GrCoverageSetOpXPFactory>();
}
GrXPFactory* GrCoverageSetOpXPFactory::Create(SkRegion::Op regionOp, bool invertCoverage) {
switch (regionOp) {
case SkRegion::kReplace_Op: {
if (invertCoverage) {
static GrCoverageSetOpXPFactory gReplaceCDXPFI(regionOp, invertCoverage);
return SkRef(&gReplaceCDXPFI);
} else {
static GrCoverageSetOpXPFactory gReplaceCDXPF(regionOp, invertCoverage);
return SkRef(&gReplaceCDXPF);
}
break;
}
case SkRegion::kIntersect_Op: {
if (invertCoverage) {
static GrCoverageSetOpXPFactory gIntersectCDXPFI(regionOp, invertCoverage);
return SkRef(&gIntersectCDXPFI);
} else {
static GrCoverageSetOpXPFactory gIntersectCDXPF(regionOp, invertCoverage);
return SkRef(&gIntersectCDXPF);
}
break;
}
case SkRegion::kUnion_Op: {
if (invertCoverage) {
static GrCoverageSetOpXPFactory gUnionCDXPFI(regionOp, invertCoverage);
return SkRef(&gUnionCDXPFI);
} else {
static GrCoverageSetOpXPFactory gUnionCDXPF(regionOp, invertCoverage);
return SkRef(&gUnionCDXPF);
}
break;
}
case SkRegion::kXOR_Op: {
if (invertCoverage) {
static GrCoverageSetOpXPFactory gXORCDXPFI(regionOp, invertCoverage);
return SkRef(&gXORCDXPFI);
} else {
static GrCoverageSetOpXPFactory gXORCDXPF(regionOp, invertCoverage);
return SkRef(&gXORCDXPF);
}
break;
}
case SkRegion::kDifference_Op: {
if (invertCoverage) {
static GrCoverageSetOpXPFactory gDifferenceCDXPFI(regionOp, invertCoverage);
return SkRef(&gDifferenceCDXPFI);
} else {
static GrCoverageSetOpXPFactory gDifferenceCDXPF(regionOp, invertCoverage);
return SkRef(&gDifferenceCDXPF);
}
break;
}
case SkRegion::kReverseDifference_Op: {
if (invertCoverage) {
static GrCoverageSetOpXPFactory gRevDiffCDXPFI(regionOp, invertCoverage);
return SkRef(&gRevDiffCDXPFI);
} else {
static GrCoverageSetOpXPFactory gRevDiffCDXPF(regionOp, invertCoverage);
return SkRef(&gRevDiffCDXPF);
}
break;
}
default:
return nullptr;
}
}
GrXferProcessor*
GrCoverageSetOpXPFactory::onCreateXferProcessor(const GrCaps& caps,
const GrPipelineOptimizations& optimizations,
bool hasMixedSamples,
const DstTexture* dst) const {
// We don't support inverting coverage with mixed samples. We don't expect to ever want this in
// the future, however we could at some point make this work using an inverted coverage
// modulation table. Note that an inverted table still won't work if there are coverage procs.
if (fInvertCoverage && hasMixedSamples) {
SkASSERT(false);
return nullptr;
}
return CoverageSetOpXP::Create(fRegionOp, fInvertCoverage);
}
void GrCoverageSetOpXPFactory::getInvariantBlendedColor(const GrProcOptInfo& colorPOI,
InvariantBlendedColor* blendedColor) const {
blendedColor->fWillBlendWithDst = SkRegion::kReplace_Op != fRegionOp;
blendedColor->fKnownColorFlags = kNone_GrColorComponentFlags;
}
GR_DEFINE_XP_FACTORY_TEST(GrCoverageSetOpXPFactory);
const GrXPFactory* GrCoverageSetOpXPFactory::TestCreate(GrProcessorTestData* d) {
SkRegion::Op regionOp = SkRegion::Op(d->fRandom->nextULessThan(SkRegion::kLastOp + 1));
bool invertCoverage = !d->fRenderTarget->hasMixedSamples() && d->fRandom->nextBool();
return GrCoverageSetOpXPFactory::Create(regionOp, invertCoverage);
}
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