| /* |
| * 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 "GrRenderTargetContext.h" |
| #include "GrPipeline.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 GrPipelineAnalysis& analysis, |
| bool doesStencilWrite, |
| GrColor* color, |
| const GrCaps& caps) const override; |
| |
| void onGetGLSLProcessorKey(const GrShaderCaps& 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 GrShaderCaps& 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 GrShaderCaps& caps, |
| GrProcessorKeyBuilder* b) const { |
| GLCoverageSetOpXP::GenKey(*this, caps, b); |
| } |
| |
| GrGLSLXferProcessor* CoverageSetOpXP::createGLSLInstance() const { |
| return new GLCoverageSetOpXP(*this); |
| } |
| |
| GrXferProcessor::OptFlags CoverageSetOpXP::onGetOptimizations(const GrPipelineAnalysis& analysis, |
| 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, |
| 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 GrPipelineAnalysis&, bool, GrColor*, |
| const GrCaps&) const override { |
| // We never look at the color input |
| return GrXferProcessor::kIgnoreColor_OptFlag; |
| } |
| |
| void onGetGLSLProcessorKey(const GrShaderCaps& 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 GrShaderCaps&, |
| GrProcessorKeyBuilder* b) const { |
| GLShaderCSOXferProcessor::GenKey(*this, b); |
| } |
| |
| GrGLSLXferProcessor* ShaderCSOXferProcessor::createGLSLInstance() const { |
| return new GLShaderCSOXferProcessor; |
| } |
| |
| /////////////////////////////////////////////////////////////////////////////// |
| // |
| constexpr GrCoverageSetOpXPFactory::GrCoverageSetOpXPFactory(SkRegion::Op regionOp, |
| bool invertCoverage) |
| : fRegionOp(regionOp), fInvertCoverage(invertCoverage) {} |
| |
| const GrXPFactory* GrCoverageSetOpXPFactory::Get(SkRegion::Op regionOp, bool invertCoverage) { |
| // If these objects are constructed as static constexpr by cl.exe (2015 SP2) the vtables are |
| // null. |
| #ifdef SK_BUILD_FOR_WIN |
| #define _CONSTEXPR_ |
| #else |
| #define _CONSTEXPR_ constexpr |
| #endif |
| switch (regionOp) { |
| case SkRegion::kReplace_Op: { |
| if (invertCoverage) { |
| static _CONSTEXPR_ const GrCoverageSetOpXPFactory gReplaceCDXPFI( |
| SkRegion::kReplace_Op, true); |
| return &gReplaceCDXPFI; |
| } else { |
| static _CONSTEXPR_ const GrCoverageSetOpXPFactory gReplaceCDXPF( |
| SkRegion::kReplace_Op, false); |
| return &gReplaceCDXPF; |
| } |
| } |
| case SkRegion::kIntersect_Op: { |
| if (invertCoverage) { |
| static _CONSTEXPR_ const GrCoverageSetOpXPFactory gIntersectCDXPFI( |
| SkRegion::kIntersect_Op, true); |
| return &gIntersectCDXPFI; |
| } else { |
| static _CONSTEXPR_ const GrCoverageSetOpXPFactory gIntersectCDXPF( |
| SkRegion::kIntersect_Op, false); |
| return &gIntersectCDXPF; |
| } |
| } |
| case SkRegion::kUnion_Op: { |
| if (invertCoverage) { |
| static _CONSTEXPR_ const GrCoverageSetOpXPFactory gUnionCDXPFI(SkRegion::kUnion_Op, |
| true); |
| return &gUnionCDXPFI; |
| } else { |
| static _CONSTEXPR_ const GrCoverageSetOpXPFactory gUnionCDXPF(SkRegion::kUnion_Op, |
| false); |
| return &gUnionCDXPF; |
| } |
| } |
| case SkRegion::kXOR_Op: { |
| if (invertCoverage) { |
| static _CONSTEXPR_ const GrCoverageSetOpXPFactory gXORCDXPFI(SkRegion::kXOR_Op, |
| true); |
| return &gXORCDXPFI; |
| } else { |
| static _CONSTEXPR_ const GrCoverageSetOpXPFactory gXORCDXPF(SkRegion::kXOR_Op, |
| false); |
| return &gXORCDXPF; |
| } |
| } |
| case SkRegion::kDifference_Op: { |
| if (invertCoverage) { |
| static _CONSTEXPR_ const GrCoverageSetOpXPFactory gDifferenceCDXPFI( |
| SkRegion::kDifference_Op, true); |
| return &gDifferenceCDXPFI; |
| } else { |
| static _CONSTEXPR_ const GrCoverageSetOpXPFactory gDifferenceCDXPF( |
| SkRegion::kDifference_Op, false); |
| return &gDifferenceCDXPF; |
| } |
| } |
| case SkRegion::kReverseDifference_Op: { |
| if (invertCoverage) { |
| static _CONSTEXPR_ const GrCoverageSetOpXPFactory gRevDiffCDXPFI( |
| SkRegion::kReverseDifference_Op, true); |
| return &gRevDiffCDXPFI; |
| } else { |
| static _CONSTEXPR_ const GrCoverageSetOpXPFactory gRevDiffCDXPF( |
| SkRegion::kReverseDifference_Op, false); |
| return &gRevDiffCDXPF; |
| } |
| } |
| } |
| #undef _CONSTEXPR_ |
| SkFAIL("Unknown region op."); |
| return nullptr; |
| } |
| |
| GrXferProcessor* GrCoverageSetOpXPFactory::onCreateXferProcessor(const GrCaps& caps, |
| const GrPipelineAnalysis& analysis, |
| 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; |
| } |
| |
| if (analysis.fUsesPLSDstRead) { |
| return new ShaderCSOXferProcessor(dst, hasMixedSamples, fRegionOp, fInvertCoverage); |
| } |
| return CoverageSetOpXP::Create(fRegionOp, fInvertCoverage); |
| } |
| |
| GR_DEFINE_XP_FACTORY_TEST(GrCoverageSetOpXPFactory); |
| |
| #if GR_TEST_UTILS |
| const GrXPFactory* GrCoverageSetOpXPFactory::TestGet(GrProcessorTestData* d) { |
| SkRegion::Op regionOp = SkRegion::Op(d->fRandom->nextULessThan(SkRegion::kLastOp + 1)); |
| bool invertCoverage = !d->fRenderTargetContext->hasMixedSamples() && d->fRandom->nextBool(); |
| return GrCoverageSetOpXPFactory::Get(regionOp, invertCoverage); |
| } |
| #endif |