| /* |
| * Copyright 2015 Google Inc. |
| * |
| * Use of this source code is governed by a BSD-style license that can be |
| * found in the LICENSE file. |
| */ |
| |
| #include "src/gpu/GrFragmentProcessor.h" |
| #include "src/gpu/GrPipeline.h" |
| #include "src/gpu/GrProcessorAnalysis.h" |
| #include "src/gpu/effects/GrXfermodeFragmentProcessor.h" |
| #include "src/gpu/effects/generated/GrClampFragmentProcessor.h" |
| #include "src/gpu/effects/generated/GrConstColorProcessor.h" |
| #include "src/gpu/effects/generated/GrOverrideInputFragmentProcessor.h" |
| #include "src/gpu/glsl/GrGLSLFragmentProcessor.h" |
| #include "src/gpu/glsl/GrGLSLFragmentShaderBuilder.h" |
| #include "src/gpu/glsl/GrGLSLProgramDataManager.h" |
| #include "src/gpu/glsl/GrGLSLUniformHandler.h" |
| |
| bool GrFragmentProcessor::isEqual(const GrFragmentProcessor& that) const { |
| if (this->classID() != that.classID()) { |
| return false; |
| } |
| if (this->usesVaryingCoordsDirectly() != that.usesVaryingCoordsDirectly()) { |
| return false; |
| } |
| if (!this->onIsEqual(that)) { |
| return false; |
| } |
| if (this->numChildProcessors() != that.numChildProcessors()) { |
| return false; |
| } |
| for (int i = 0; i < this->numChildProcessors(); ++i) { |
| auto thisChild = this->childProcessor(i), |
| thatChild = that .childProcessor(i); |
| if (SkToBool(thisChild) != SkToBool(thatChild)) { |
| return false; |
| } |
| if (thisChild && !thisChild->isEqual(*thatChild)) { |
| return false; |
| } |
| } |
| return true; |
| } |
| |
| void GrFragmentProcessor::visitProxies(const GrOp::VisitProxyFunc& func) const { |
| this->visitTextureEffects([&func](const GrTextureEffect& te) { |
| bool mipped = (GrSamplerState::Filter::kMipMap == te.samplerState().filter()); |
| func(te.view().proxy(), GrMipMapped(mipped)); |
| }); |
| } |
| |
| void GrFragmentProcessor::visitTextureEffects( |
| const std::function<void(const GrTextureEffect&)>& func) const { |
| if (auto* te = this->asTextureEffect()) { |
| func(*te); |
| } |
| for (auto& child : fChildProcessors) { |
| if (child) { |
| child->visitTextureEffects(func); |
| } |
| } |
| } |
| |
| GrTextureEffect* GrFragmentProcessor::asTextureEffect() { |
| if (this->classID() == kGrTextureEffect_ClassID) { |
| return static_cast<GrTextureEffect*>(this); |
| } |
| return nullptr; |
| } |
| |
| const GrTextureEffect* GrFragmentProcessor::asTextureEffect() const { |
| if (this->classID() == kGrTextureEffect_ClassID) { |
| return static_cast<const GrTextureEffect*>(this); |
| } |
| return nullptr; |
| } |
| |
| GrGLSLFragmentProcessor* GrFragmentProcessor::createGLSLInstance() const { |
| GrGLSLFragmentProcessor* glFragProc = this->onCreateGLSLInstance(); |
| glFragProc->fChildProcessors.push_back_n(fChildProcessors.count()); |
| for (int i = 0; i < fChildProcessors.count(); ++i) { |
| glFragProc->fChildProcessors[i] = |
| fChildProcessors[i] ? fChildProcessors[i]->createGLSLInstance() : nullptr; |
| } |
| return glFragProc; |
| } |
| |
| void GrFragmentProcessor::addAndPushFlagToChildren(PrivateFlags flag) { |
| // This propagates down, so if we've already marked it, all our children should have it too |
| if (!(fFlags & flag)) { |
| fFlags |= flag; |
| for (auto& child : fChildProcessors) { |
| if (child) { |
| child->addAndPushFlagToChildren(flag); |
| } |
| } |
| } |
| #ifdef SK_DEBUG |
| for (auto& child : fChildProcessors) { |
| SkASSERT(!child || (child->fFlags & flag)); |
| } |
| #endif |
| } |
| |
| int GrFragmentProcessor::numNonNullChildProcessors() const { |
| return std::count_if(fChildProcessors.begin(), fChildProcessors.end(), |
| [](const auto& c) { return c != nullptr; }); |
| } |
| |
| #ifdef SK_DEBUG |
| bool GrFragmentProcessor::isInstantiated() const { |
| bool result = true; |
| this->visitTextureEffects([&result](const GrTextureEffect& te) { |
| if (!te.texture()) { |
| result = false; |
| } |
| }); |
| return result; |
| } |
| #endif |
| |
| void GrFragmentProcessor::registerChild(std::unique_ptr<GrFragmentProcessor> child, |
| SkSL::SampleUsage sampleUsage) { |
| if (!child) { |
| fChildProcessors.push_back(nullptr); |
| return; |
| } |
| |
| // The child should not have been attached to another FP already and not had any sampling |
| // strategy set on it. |
| SkASSERT(!child->fParent && !child->sampleUsage().isSampled() && |
| !child->isSampledWithExplicitCoords() && !child->hasPerspectiveTransform()); |
| |
| // If a child is sampled directly (sample(child)), and with a single uniform matrix, we need to |
| // treat it as if it were sampled with multiple matrices (eg variable). |
| bool variableMatrix = sampleUsage.hasVariableMatrix() || |
| (sampleUsage.fPassThrough && sampleUsage.hasUniformMatrix()); |
| |
| // Configure child's sampling state first |
| child->fUsage = sampleUsage; |
| |
| // When an FP is sampled using variable matrix expressions, it is effectively being sampled |
| // explicitly, except that the call site will automatically evaluate the matrix expression to |
| // produce the float2 passed into this FP. |
| if (sampleUsage.fExplicitCoords || variableMatrix) { |
| child->addAndPushFlagToChildren(kSampledWithExplicitCoords_Flag); |
| } |
| |
| // Push perspective matrix type to children |
| if (sampleUsage.fHasPerspective) { |
| child->addAndPushFlagToChildren(kNetTransformHasPerspective_Flag); |
| } |
| |
| // If the child is sampled with a variable matrix expression, auto-generated code in |
| // invokeChildWithMatrix() for this FP will refer to the local coordinates. |
| if (variableMatrix) { |
| this->setUsesSampleCoordsDirectly(); |
| } |
| |
| // If the child is not sampled explicitly and not already accessing sample coords directly |
| // (through reference or variable matrix expansion), then mark that this FP tree relies on |
| // coordinates at a lower level. If the child is sampled with explicit coordinates and |
| // there isn't any other direct reference to the sample coords, we halt the upwards propagation |
| // because it means this FP is determining coordinates on its own. |
| if (!child->isSampledWithExplicitCoords()) { |
| if ((child->fFlags & kUsesSampleCoordsDirectly_Flag || |
| child->fFlags & kUsesSampleCoordsIndirectly_Flag)) { |
| fFlags |= kUsesSampleCoordsIndirectly_Flag; |
| } |
| } |
| |
| fRequestedFeatures |= child->fRequestedFeatures; |
| |
| // Record that the child is attached to us; this FP is the source of any uniform data needed |
| // to evaluate the child sample matrix. |
| child->fParent = this; |
| fChildProcessors.push_back(std::move(child)); |
| |
| // Sanity check: our sample strategy comes from a parent we shouldn't have yet. |
| SkASSERT(!this->isSampledWithExplicitCoords() && !this->hasPerspectiveTransform() && |
| !fUsage.isSampled() && !fParent); |
| } |
| |
| void GrFragmentProcessor::cloneAndRegisterAllChildProcessors(const GrFragmentProcessor& src) { |
| for (int i = 0; i < src.numChildProcessors(); ++i) { |
| if (auto fp = src.childProcessor(i)) { |
| this->registerChild(fp->clone(), fp->sampleUsage()); |
| } else { |
| this->registerChild(nullptr); |
| } |
| } |
| } |
| |
| std::unique_ptr<GrFragmentProcessor> GrFragmentProcessor::MulChildByInputAlpha( |
| std::unique_ptr<GrFragmentProcessor> fp) { |
| if (!fp) { |
| return nullptr; |
| } |
| return GrXfermodeFragmentProcessor::Make(/*src=*/nullptr, std::move(fp), SkBlendMode::kDstIn); |
| } |
| |
| std::unique_ptr<GrFragmentProcessor> GrFragmentProcessor::MulInputByChildAlpha( |
| std::unique_ptr<GrFragmentProcessor> fp) { |
| if (!fp) { |
| return nullptr; |
| } |
| return GrXfermodeFragmentProcessor::Make(/*src=*/nullptr, std::move(fp), SkBlendMode::kSrcIn); |
| } |
| |
| std::unique_ptr<GrFragmentProcessor> GrFragmentProcessor::ModulateAlpha( |
| std::unique_ptr<GrFragmentProcessor> inputFP, const SkPMColor4f& color) { |
| auto colorFP = GrConstColorProcessor::Make(color); |
| return GrXfermodeFragmentProcessor::Make( |
| std::move(colorFP), std::move(inputFP), SkBlendMode::kSrcIn, |
| GrXfermodeFragmentProcessor::ComposeBehavior::kSkModeBehavior); |
| } |
| |
| std::unique_ptr<GrFragmentProcessor> GrFragmentProcessor::ModulateRGBA( |
| std::unique_ptr<GrFragmentProcessor> inputFP, const SkPMColor4f& color) { |
| auto colorFP = GrConstColorProcessor::Make(color); |
| return GrXfermodeFragmentProcessor::Make( |
| std::move(colorFP), std::move(inputFP), SkBlendMode::kModulate, |
| GrXfermodeFragmentProcessor::ComposeBehavior::kSkModeBehavior); |
| } |
| |
| std::unique_ptr<GrFragmentProcessor> GrFragmentProcessor::ClampPremulOutput( |
| std::unique_ptr<GrFragmentProcessor> fp) { |
| if (!fp) { |
| return nullptr; |
| } |
| return GrClampFragmentProcessor::Make(std::move(fp), /*clampToPremul=*/true); |
| } |
| |
| std::unique_ptr<GrFragmentProcessor> GrFragmentProcessor::SwizzleOutput( |
| std::unique_ptr<GrFragmentProcessor> fp, const GrSwizzle& swizzle) { |
| class SwizzleFragmentProcessor : public GrFragmentProcessor { |
| public: |
| static std::unique_ptr<GrFragmentProcessor> Make(std::unique_ptr<GrFragmentProcessor> fp, |
| const GrSwizzle& swizzle) { |
| return std::unique_ptr<GrFragmentProcessor>( |
| new SwizzleFragmentProcessor(std::move(fp), swizzle)); |
| } |
| |
| const char* name() const override { return "Swizzle"; } |
| const GrSwizzle& swizzle() const { return fSwizzle; } |
| |
| std::unique_ptr<GrFragmentProcessor> clone() const override { |
| return Make(this->childProcessor(0)->clone(), fSwizzle); |
| } |
| |
| private: |
| SwizzleFragmentProcessor(std::unique_ptr<GrFragmentProcessor> fp, const GrSwizzle& swizzle) |
| : INHERITED(kSwizzleFragmentProcessor_ClassID, ProcessorOptimizationFlags(fp.get())) |
| , fSwizzle(swizzle) { |
| this->registerChild(std::move(fp)); |
| } |
| |
| GrGLSLFragmentProcessor* onCreateGLSLInstance() const override { |
| class GLFP : public GrGLSLFragmentProcessor { |
| public: |
| void emitCode(EmitArgs& args) override { |
| SkString childColor = this->invokeChild(0, args.fInputColor, args); |
| |
| const SwizzleFragmentProcessor& sfp = args.fFp.cast<SwizzleFragmentProcessor>(); |
| const GrSwizzle& swizzle = sfp.swizzle(); |
| GrGLSLFPFragmentBuilder* fragBuilder = args.fFragBuilder; |
| |
| fragBuilder->codeAppendf("%s = %s.%s;", |
| args.fOutputColor, childColor.c_str(), swizzle.asString().c_str()); |
| } |
| }; |
| return new GLFP; |
| } |
| |
| void onGetGLSLProcessorKey(const GrShaderCaps&, GrProcessorKeyBuilder* b) const override { |
| b->add32(fSwizzle.asKey()); |
| } |
| |
| bool onIsEqual(const GrFragmentProcessor& other) const override { |
| const SwizzleFragmentProcessor& sfp = other.cast<SwizzleFragmentProcessor>(); |
| return fSwizzle == sfp.fSwizzle; |
| } |
| |
| SkPMColor4f constantOutputForConstantInput(const SkPMColor4f& input) const override { |
| return fSwizzle.applyTo(input); |
| } |
| |
| GrSwizzle fSwizzle; |
| |
| typedef GrFragmentProcessor INHERITED; |
| }; |
| |
| if (!fp) { |
| return nullptr; |
| } |
| if (GrSwizzle::RGBA() == swizzle) { |
| return fp; |
| } |
| return SwizzleFragmentProcessor::Make(std::move(fp), swizzle); |
| } |
| |
| std::unique_ptr<GrFragmentProcessor> GrFragmentProcessor::MakeInputPremulAndMulByOutput( |
| std::unique_ptr<GrFragmentProcessor> fp) { |
| class PremulFragmentProcessor : public GrFragmentProcessor { |
| public: |
| static std::unique_ptr<GrFragmentProcessor> Make( |
| std::unique_ptr<GrFragmentProcessor> processor) { |
| return std::unique_ptr<GrFragmentProcessor>( |
| new PremulFragmentProcessor(std::move(processor))); |
| } |
| |
| const char* name() const override { return "Premultiply"; } |
| |
| std::unique_ptr<GrFragmentProcessor> clone() const override { |
| return Make(this->childProcessor(0)->clone()); |
| } |
| |
| private: |
| PremulFragmentProcessor(std::unique_ptr<GrFragmentProcessor> processor) |
| : INHERITED(kPremulFragmentProcessor_ClassID, OptFlags(processor.get())) { |
| this->registerChild(std::move(processor)); |
| } |
| |
| GrGLSLFragmentProcessor* onCreateGLSLInstance() const override { |
| class GLFP : public GrGLSLFragmentProcessor { |
| public: |
| void emitCode(EmitArgs& args) override { |
| GrGLSLFPFragmentBuilder* fragBuilder = args.fFragBuilder; |
| SkString temp = this->invokeChild(0, args); |
| fragBuilder->codeAppendf("%s = %s;", args.fOutputColor, temp.c_str()); |
| fragBuilder->codeAppendf("%s.rgb *= %s.rgb;", args.fOutputColor, |
| args.fInputColor); |
| fragBuilder->codeAppendf("%s *= %s.a;", args.fOutputColor, args.fInputColor); |
| } |
| }; |
| return new GLFP; |
| } |
| |
| void onGetGLSLProcessorKey(const GrShaderCaps&, GrProcessorKeyBuilder*) const override {} |
| |
| bool onIsEqual(const GrFragmentProcessor&) const override { return true; } |
| |
| static OptimizationFlags OptFlags(const GrFragmentProcessor* inner) { |
| OptimizationFlags flags = kNone_OptimizationFlags; |
| if (inner->preservesOpaqueInput()) { |
| flags |= kPreservesOpaqueInput_OptimizationFlag; |
| } |
| if (inner->hasConstantOutputForConstantInput()) { |
| flags |= kConstantOutputForConstantInput_OptimizationFlag; |
| } |
| return flags; |
| } |
| |
| SkPMColor4f constantOutputForConstantInput(const SkPMColor4f& input) const override { |
| SkPMColor4f childColor = ConstantOutputForConstantInput(this->childProcessor(0), |
| SK_PMColor4fWHITE); |
| SkPMColor4f premulInput = SkColor4f{ input.fR, input.fG, input.fB, input.fA }.premul(); |
| return premulInput * childColor; |
| } |
| |
| typedef GrFragmentProcessor INHERITED; |
| }; |
| if (!fp) { |
| return nullptr; |
| } |
| return PremulFragmentProcessor::Make(std::move(fp)); |
| } |
| |
| ////////////////////////////////////////////////////////////////////////////// |
| |
| std::unique_ptr<GrFragmentProcessor> GrFragmentProcessor::OverrideInput( |
| std::unique_ptr<GrFragmentProcessor> fp, const SkPMColor4f& color, bool useUniform) { |
| if (!fp) { |
| return nullptr; |
| } |
| return GrOverrideInputFragmentProcessor::Make(std::move(fp), color, useUniform); |
| } |
| |
| std::unique_ptr<GrFragmentProcessor> GrFragmentProcessor::RunInSeries( |
| std::unique_ptr<GrFragmentProcessor> series[], int cnt) { |
| class SeriesFragmentProcessor : public GrFragmentProcessor { |
| public: |
| static std::unique_ptr<GrFragmentProcessor> Make( |
| std::unique_ptr<GrFragmentProcessor>* children, int cnt) { |
| return std::unique_ptr<GrFragmentProcessor>(new SeriesFragmentProcessor(children, cnt)); |
| } |
| |
| const char* name() const override { return "Series"; } |
| |
| std::unique_ptr<GrFragmentProcessor> clone() const override { |
| SkSTArray<4, std::unique_ptr<GrFragmentProcessor>> children(this->numChildProcessors()); |
| for (int i = 0; i < this->numChildProcessors(); ++i) { |
| if (this->childProcessor(i)) { |
| if (!children.push_back(this->childProcessor(i)->clone())) { |
| return nullptr; |
| } |
| } else { |
| children.push_back(nullptr); |
| } |
| } |
| return Make(children.begin(), this->numChildProcessors()); |
| } |
| |
| private: |
| GrGLSLFragmentProcessor* onCreateGLSLInstance() const override { |
| class GLFP : public GrGLSLFragmentProcessor { |
| public: |
| void emitCode(EmitArgs& args) override { |
| // First guy's input might be nil. |
| SkString result = this->invokeChild(0, args.fInputColor, args); |
| for (int i = 1; i < this->numChildProcessors(); ++i) { |
| result = this->invokeChild(i, result.c_str(), args); |
| } |
| // Copy last output to our output variable |
| args.fFragBuilder->codeAppendf("%s = %s;", args.fOutputColor, result.c_str()); |
| } |
| }; |
| return new GLFP; |
| } |
| |
| SeriesFragmentProcessor(std::unique_ptr<GrFragmentProcessor>* children, int cnt) |
| : INHERITED(kSeriesFragmentProcessor_ClassID, OptFlags(children, cnt)) { |
| SkASSERT(cnt > 1); |
| for (int i = 0; i < cnt; ++i) { |
| this->registerChild(std::move(children[i])); |
| } |
| } |
| |
| static OptimizationFlags OptFlags(std::unique_ptr<GrFragmentProcessor>* children, int cnt) { |
| OptimizationFlags flags = kAll_OptimizationFlags; |
| for (int i = 0; i < cnt && flags != kNone_OptimizationFlags; ++i) { |
| flags &= children[i]->optimizationFlags(); |
| } |
| return flags; |
| } |
| void onGetGLSLProcessorKey(const GrShaderCaps&, GrProcessorKeyBuilder*) const override {} |
| |
| bool onIsEqual(const GrFragmentProcessor&) const override { return true; } |
| |
| SkPMColor4f constantOutputForConstantInput(const SkPMColor4f& inColor) const override { |
| SkPMColor4f color = inColor; |
| int childCnt = this->numChildProcessors(); |
| for (int i = 0; i < childCnt; ++i) { |
| color = ConstantOutputForConstantInput(this->childProcessor(i), color); |
| } |
| return color; |
| } |
| |
| typedef GrFragmentProcessor INHERITED; |
| }; |
| |
| if (!cnt) { |
| return nullptr; |
| } |
| if (1 == cnt) { |
| return std::move(series[0]); |
| } |
| // Run the through the series, do the invariant output processing, and look for eliminations. |
| GrProcessorAnalysisColor inputColor; |
| inputColor.setToUnknown(); |
| GrColorFragmentProcessorAnalysis info(inputColor, series, cnt); |
| SkTArray<std::unique_ptr<GrFragmentProcessor>> replacementSeries; |
| SkPMColor4f knownColor; |
| int leadingFPsToEliminate = info.initialProcessorsToEliminate(&knownColor); |
| if (leadingFPsToEliminate) { |
| std::unique_ptr<GrFragmentProcessor> colorFP = GrConstColorProcessor::Make(knownColor); |
| if (leadingFPsToEliminate == cnt) { |
| return colorFP; |
| } |
| cnt = cnt - leadingFPsToEliminate + 1; |
| replacementSeries.reserve(cnt); |
| replacementSeries.emplace_back(std::move(colorFP)); |
| for (int i = 0; i < cnt - 1; ++i) { |
| replacementSeries.emplace_back(std::move(series[leadingFPsToEliminate + i])); |
| } |
| series = replacementSeries.begin(); |
| } |
| return SeriesFragmentProcessor::Make(series, cnt); |
| } |
| |
| ////////////////////////////////////////////////////////////////////////////// |
| |
| GrFragmentProcessor::CIter::CIter(const GrPaint& paint) { |
| for (int i = paint.numCoverageFragmentProcessors() - 1; i >= 0; --i) { |
| fFPStack.push_back(paint.getCoverageFragmentProcessor(i)); |
| } |
| for (int i = paint.numColorFragmentProcessors() - 1; i >= 0; --i) { |
| fFPStack.push_back(paint.getColorFragmentProcessor(i)); |
| } |
| } |
| |
| GrFragmentProcessor::CIter::CIter(const GrPipeline& pipeline) { |
| for (int i = pipeline.numFragmentProcessors() - 1; i >= 0; --i) { |
| fFPStack.push_back(&pipeline.getFragmentProcessor(i)); |
| } |
| } |
| |
| GrFragmentProcessor::CIter& GrFragmentProcessor::CIter::operator++() { |
| SkASSERT(!fFPStack.empty()); |
| const GrFragmentProcessor* back = fFPStack.back(); |
| fFPStack.pop_back(); |
| for (int i = back->numChildProcessors() - 1; i >= 0; --i) { |
| if (auto child = back->childProcessor(i)) { |
| fFPStack.push_back(child); |
| } |
| } |
| return *this; |
| } |
| |