| /* |
| * Copyright 2006 The Android Open Source Project |
| * |
| * Use of this source code is governed by a BSD-style license that can be |
| * found in the LICENSE file. |
| */ |
| |
| #include "include/core/SkRefCnt.h" |
| #include "include/core/SkString.h" |
| #include "include/core/SkUnPreMultiply.h" |
| #include "include/private/SkNx.h" |
| #include "include/private/SkTDArray.h" |
| #include "src/core/SkArenaAlloc.h" |
| #include "src/core/SkColorFilterBase.h" |
| #include "src/core/SkColorSpacePriv.h" |
| #include "src/core/SkColorSpaceXformSteps.h" |
| #include "src/core/SkMatrixProvider.h" |
| #include "src/core/SkRasterPipeline.h" |
| #include "src/core/SkReadBuffer.h" |
| #include "src/core/SkVM.h" |
| #include "src/core/SkWriteBuffer.h" |
| |
| #if SK_SUPPORT_GPU |
| #include "src/gpu/GrColorSpaceXform.h" |
| #include "src/gpu/GrFragmentProcessor.h" |
| #include "src/gpu/effects/generated/GrMixerEffect.h" |
| #endif |
| |
| bool SkColorFilter::asColorMode(SkColor* color, SkBlendMode* mode) const { |
| return as_CFB(this)->onAsAColorMode(color, mode); |
| } |
| |
| bool SkColorFilter::asAColorMode(SkColor* color, SkBlendMode* mode) const { |
| return as_CFB(this)->onAsAColorMode(color, mode); |
| } |
| |
| bool SkColorFilter::asAColorMatrix(float matrix[20]) const { |
| return as_CFB(this)->onAsAColorMatrix(matrix); |
| } |
| |
| uint32_t SkColorFilter::getFlags() const { return as_CFB(this)->onGetFlags(); } |
| |
| bool SkColorFilter::isAlphaUnchanged() const { |
| return SkToBool(this->getFlags() & kAlphaUnchanged_Flag); |
| } |
| |
| ////////////////////////////////////////////////////////////////////////////////////////////////// |
| |
| bool SkColorFilterBase::onAsAColorMode(SkColor*, SkBlendMode*) const { |
| return false; |
| } |
| |
| bool SkColorFilterBase::onAsAColorMatrix(float matrix[20]) const { |
| return false; |
| } |
| |
| #if SK_SUPPORT_GPU |
| GrFPResult SkColorFilterBase::asFragmentProcessor(std::unique_ptr<GrFragmentProcessor> inputFP, |
| GrRecordingContext* context, |
| const GrColorInfo& dstColorInfo) const { |
| // This color filter doesn't implement `asFragmentProcessor`. |
| return GrFPFailure(std::move(inputFP)); |
| } |
| #endif |
| |
| bool SkColorFilterBase::appendStages(const SkStageRec& rec, bool shaderIsOpaque) const { |
| return this->onAppendStages(rec, shaderIsOpaque); |
| } |
| |
| skvm::Color SkColorFilterBase::program(skvm::Builder* p, skvm::Color c, |
| SkColorSpace* dstCS, |
| skvm::Uniforms* uniforms, SkArenaAlloc* alloc) const { |
| skvm::F32 original = c.a; |
| if ((c = this->onProgram(p,c, dstCS, uniforms,alloc))) { |
| if (this->isAlphaUnchanged()) { |
| c.a = original; |
| } |
| return c; |
| } |
| //SkDebugf("cannot onProgram %s\n", this->getTypeName()); |
| return {}; |
| } |
| |
| SkColor SkColorFilter::filterColor(SkColor c) const { |
| // This is mostly meaningless. We should phase-out this call entirely. |
| SkColorSpace* cs = nullptr; |
| return this->filterColor4f(SkColor4f::FromColor(c), cs, cs).toSkColor(); |
| } |
| |
| SkColor4f SkColorFilter::filterColor4f(const SkColor4f& origSrcColor, SkColorSpace* srcCS, |
| SkColorSpace* dstCS) const { |
| SkColor4f color = origSrcColor; |
| SkColorSpaceXformSteps(srcCS, kUnpremul_SkAlphaType, |
| dstCS, kPremul_SkAlphaType).apply(color.vec()); |
| |
| constexpr size_t kEnoughForCommonFilters = 512; // big enough for compose+colormatrix |
| SkSTArenaAlloc<kEnoughForCommonFilters> alloc; |
| SkRasterPipeline pipeline(&alloc); |
| pipeline.append_constant_color(&alloc, color.vec()); |
| SkPaint dummyPaint; |
| SkSimpleMatrixProvider matrixProvider(SkMatrix::I()); |
| SkStageRec rec = { |
| &pipeline, &alloc, kRGBA_F32_SkColorType, dstCS, dummyPaint, nullptr, matrixProvider |
| }; |
| as_CFB(this)->onAppendStages(rec, color.fA == 1); |
| |
| SkPMColor4f dst; |
| SkRasterPipeline_MemoryCtx dstPtr = { &dst, 0 }; |
| pipeline.append(SkRasterPipeline::store_f32, &dstPtr); |
| pipeline.run(0,0, 1,1); |
| return dst.unpremul(); |
| } |
| |
| /////////////////////////////////////////////////////////////////////////////////////////////////// |
| |
| class SkComposeColorFilter : public SkColorFilterBase { |
| public: |
| uint32_t onGetFlags() const override { |
| // Can only claim alphaunchanged support if both our proxys do. |
| return fOuter->onGetFlags() & fInner->onGetFlags(); |
| } |
| |
| bool onAppendStages(const SkStageRec& rec, bool shaderIsOpaque) const override { |
| bool innerIsOpaque = shaderIsOpaque; |
| if (!fInner->isAlphaUnchanged()) { |
| innerIsOpaque = false; |
| } |
| return fInner->appendStages(rec, shaderIsOpaque) && |
| fOuter->appendStages(rec, innerIsOpaque); |
| } |
| |
| skvm::Color onProgram(skvm::Builder* p, skvm::Color c, |
| SkColorSpace* dstCS, |
| skvm::Uniforms* uniforms, SkArenaAlloc* alloc) const override { |
| c = fInner->program(p, c, dstCS, uniforms, alloc); |
| return c ? fOuter->program(p, c, dstCS, uniforms, alloc) : skvm::Color{}; |
| } |
| |
| #if SK_SUPPORT_GPU |
| GrFPResult asFragmentProcessor(std::unique_ptr<GrFragmentProcessor> inputFP, |
| GrRecordingContext* context, |
| const GrColorInfo& dstColorInfo) const override { |
| GrFragmentProcessor* originalInputFP = inputFP.get(); |
| |
| auto [innerSuccess, innerFP] = |
| fInner->asFragmentProcessor(std::move(inputFP), context, dstColorInfo); |
| if (!innerSuccess) { |
| return GrFPFailure(std::move(innerFP)); |
| } |
| |
| auto [outerSuccess, outerFP] = |
| fOuter->asFragmentProcessor(std::move(innerFP), context, dstColorInfo); |
| if (!outerSuccess) { |
| // In the rare event that the outer FP cannot be built, we have no good way of |
| // separating the inputFP from the innerFP, so we need to return a cloned inputFP. |
| // This could hypothetically be expensive, but failure here should be extremely rare. |
| return GrFPFailure(originalInputFP->clone()); |
| } |
| |
| return GrFPSuccess(std::move(outerFP)); |
| } |
| #endif |
| |
| SK_FLATTENABLE_HOOKS(SkComposeColorFilter) |
| |
| protected: |
| void flatten(SkWriteBuffer& buffer) const override { |
| buffer.writeFlattenable(fOuter.get()); |
| buffer.writeFlattenable(fInner.get()); |
| } |
| |
| private: |
| SkComposeColorFilter(sk_sp<SkColorFilter> outer, sk_sp<SkColorFilter> inner) |
| : fOuter(as_CFB_sp(std::move(outer))) |
| , fInner(as_CFB_sp(std::move(inner))) |
| {} |
| |
| sk_sp<SkColorFilterBase> fOuter; |
| sk_sp<SkColorFilterBase> fInner; |
| |
| friend class SkColorFilter; |
| |
| using INHERITED = SkColorFilter; |
| }; |
| |
| sk_sp<SkFlattenable> SkComposeColorFilter::CreateProc(SkReadBuffer& buffer) { |
| sk_sp<SkColorFilter> outer(buffer.readColorFilter()); |
| sk_sp<SkColorFilter> inner(buffer.readColorFilter()); |
| return outer ? outer->makeComposed(std::move(inner)) : inner; |
| } |
| |
| sk_sp<SkColorFilter> SkColorFilter::makeComposed(sk_sp<SkColorFilter> inner) const { |
| if (!inner) { |
| return sk_ref_sp(this); |
| } |
| |
| return sk_sp<SkColorFilter>(new SkComposeColorFilter(sk_ref_sp(this), std::move(inner))); |
| } |
| |
| /////////////////////////////////////////////////////////////////////////////////////////////////// |
| |
| class SkSRGBGammaColorFilter : public SkColorFilterBase { |
| public: |
| enum class Direction { |
| kLinearToSRGB, |
| kSRGBToLinear, |
| }; |
| SkSRGBGammaColorFilter(Direction dir) : fDir(dir), fSteps([&]{ |
| // We handle premul/unpremul separately, so here just always upm->upm. |
| if (dir == Direction::kLinearToSRGB) { |
| return SkColorSpaceXformSteps{sk_srgb_linear_singleton(), kUnpremul_SkAlphaType, |
| sk_srgb_singleton(), kUnpremul_SkAlphaType}; |
| } else { |
| return SkColorSpaceXformSteps{sk_srgb_singleton(), kUnpremul_SkAlphaType, |
| sk_srgb_linear_singleton(), kUnpremul_SkAlphaType}; |
| } |
| }()) {} |
| |
| #if SK_SUPPORT_GPU |
| GrFPResult asFragmentProcessor(std::unique_ptr<GrFragmentProcessor> inputFP, |
| GrRecordingContext* context, |
| const GrColorInfo& dstColorInfo) const override { |
| // wish our caller would let us know if our input was opaque... |
| constexpr SkAlphaType alphaType = kPremul_SkAlphaType; |
| switch (fDir) { |
| case Direction::kLinearToSRGB: |
| return GrFPSuccess(GrColorSpaceXformEffect::Make( |
| std::move(inputFP), |
| sk_srgb_linear_singleton(), alphaType, |
| sk_srgb_singleton(), alphaType)); |
| case Direction::kSRGBToLinear: |
| return GrFPSuccess(GrColorSpaceXformEffect::Make( |
| std::move(inputFP), |
| sk_srgb_singleton(), alphaType, |
| sk_srgb_linear_singleton(), alphaType)); |
| } |
| SkUNREACHABLE; |
| } |
| #endif |
| |
| bool onAppendStages(const SkStageRec& rec, bool shaderIsOpaque) const override { |
| if (!shaderIsOpaque) { |
| rec.fPipeline->append(SkRasterPipeline::unpremul); |
| } |
| |
| fSteps.apply(rec.fPipeline); |
| |
| if (!shaderIsOpaque) { |
| rec.fPipeline->append(SkRasterPipeline::premul); |
| } |
| return true; |
| } |
| |
| skvm::Color onProgram(skvm::Builder* p, skvm::Color c, SkColorSpace* dstCS, |
| skvm::Uniforms* uniforms, SkArenaAlloc* alloc) const override { |
| return premul(fSteps.program(p, uniforms, unpremul(c))); |
| } |
| |
| SK_FLATTENABLE_HOOKS(SkSRGBGammaColorFilter) |
| |
| protected: |
| void flatten(SkWriteBuffer& buffer) const override { |
| buffer.write32(static_cast<uint32_t>(fDir)); |
| } |
| |
| private: |
| const Direction fDir; |
| SkColorSpaceXformSteps fSteps; |
| |
| friend class SkColorFilter; |
| using INHERITED = SkColorFilterBase; |
| }; |
| |
| sk_sp<SkFlattenable> SkSRGBGammaColorFilter::CreateProc(SkReadBuffer& buffer) { |
| uint32_t dir = buffer.read32(); |
| if (!buffer.validate(dir <= 1)) { |
| return nullptr; |
| } |
| return sk_sp<SkFlattenable>(new SkSRGBGammaColorFilter(static_cast<Direction>(dir))); |
| } |
| |
| template <SkSRGBGammaColorFilter::Direction dir> |
| sk_sp<SkColorFilter> MakeSRGBGammaCF() { |
| static SkColorFilter* gSingleton = new SkSRGBGammaColorFilter(dir); |
| return sk_ref_sp(gSingleton); |
| } |
| |
| sk_sp<SkColorFilter> SkColorFilters::LinearToSRGBGamma() { |
| return MakeSRGBGammaCF<SkSRGBGammaColorFilter::Direction::kLinearToSRGB>(); |
| } |
| |
| sk_sp<SkColorFilter> SkColorFilters::SRGBToLinearGamma() { |
| return MakeSRGBGammaCF<SkSRGBGammaColorFilter::Direction::kSRGBToLinear>(); |
| } |
| |
| /////////////////////////////////////////////////////////////////////////////////////////////////// |
| |
| class SkMixerColorFilter : public SkColorFilterBase { |
| public: |
| SkMixerColorFilter(sk_sp<SkColorFilter> cf0, sk_sp<SkColorFilter> cf1, float weight) |
| : fCF0(as_CFB_sp(std::move(cf0))) |
| , fCF1(as_CFB_sp(std::move(cf1))) |
| , fWeight(weight) |
| { |
| SkASSERT(fCF0); |
| SkASSERT(fWeight >= 0 && fWeight <= 1); |
| } |
| |
| uint32_t onGetFlags() const override { |
| uint32_t f0 = fCF0->onGetFlags(); |
| uint32_t f1 = fCF1 ? fCF1->onGetFlags() : ~0U; |
| return f0 & f1; |
| } |
| |
| bool onAppendStages(const SkStageRec& rec, bool shaderIsOpaque) const override { |
| // want cf0 * (1 - w) + cf1 * w == lerp(w) |
| // which means |
| // dr,dg,db,da <-- cf0 |
| // r,g,b,a <-- cf1 |
| struct State { |
| float orig_rgba[4 * SkRasterPipeline_kMaxStride]; |
| float filtered_rgba[4 * SkRasterPipeline_kMaxStride]; |
| }; |
| auto state = rec.fAlloc->make<State>(); |
| SkRasterPipeline* p = rec.fPipeline; |
| |
| p->append(SkRasterPipeline::store_src, state->orig_rgba); |
| if (!fCF1) { |
| if (!fCF0->appendStages(rec, shaderIsOpaque)) { |
| return false; |
| } |
| p->append(SkRasterPipeline::move_src_dst); |
| p->append(SkRasterPipeline::load_src, state->orig_rgba); |
| } else { |
| if (!fCF0->appendStages(rec, shaderIsOpaque)) { |
| return false; |
| } |
| p->append(SkRasterPipeline::store_src, state->filtered_rgba); |
| p->append(SkRasterPipeline::load_src, state->orig_rgba); |
| if (!fCF1->appendStages(rec, shaderIsOpaque)) { |
| return false; |
| } |
| p->append(SkRasterPipeline::load_dst, state->filtered_rgba); |
| } |
| float* storage = rec.fAlloc->make<float>(fWeight); |
| p->append(SkRasterPipeline::lerp_1_float, storage); |
| return true; |
| } |
| |
| skvm::Color onProgram(skvm::Builder* p, skvm::Color c, |
| SkColorSpace* dstCS, |
| skvm::Uniforms* uniforms, SkArenaAlloc* alloc) const override { |
| skvm::Color c0 = fCF0->program(p, c, dstCS, uniforms, alloc); |
| skvm::Color c1 = fCF1 ? fCF1->program(p, c, dstCS, uniforms, alloc) : c; |
| return (c0 && c1) |
| ? lerp(c0, c1, p->uniformF(uniforms->pushF(fWeight))) |
| : skvm::Color{}; |
| } |
| |
| #if SK_SUPPORT_GPU |
| GrFPResult asFragmentProcessor(std::unique_ptr<GrFragmentProcessor> inputFP, |
| GrRecordingContext* context, |
| const GrColorInfo& dstColorInfo) const override { |
| bool success; |
| std::unique_ptr<GrFragmentProcessor> fp0, fp1; |
| |
| std::tie(success, fp0) = fCF0->asFragmentProcessor(/*inputFP=*/nullptr, |
| context, dstColorInfo); |
| if (!success) { |
| return GrFPFailure(std::move(inputFP)); |
| } |
| |
| if (fCF1) { |
| std::tie(success, fp1) = fCF1->asFragmentProcessor(/*inputFP=*/nullptr, |
| context, dstColorInfo); |
| if (!success) { |
| return GrFPFailure(std::move(inputFP)); |
| } |
| } |
| |
| return GrFPSuccess(GrMixerEffect::Make(std::move(inputFP), std::move(fp0), |
| std::move(fp1), fWeight)); |
| } |
| #endif |
| |
| SK_FLATTENABLE_HOOKS(SkMixerColorFilter) |
| |
| protected: |
| void flatten(SkWriteBuffer& buffer) const override { |
| buffer.writeFlattenable(fCF0.get()); |
| buffer.writeFlattenable(fCF1.get()); |
| buffer.writeScalar(fWeight); |
| } |
| |
| private: |
| sk_sp<SkColorFilterBase> fCF0; |
| sk_sp<SkColorFilterBase> fCF1; |
| const float fWeight; |
| |
| friend class SkColorFilter; |
| |
| using INHERITED = SkColorFilterBase; |
| }; |
| |
| sk_sp<SkFlattenable> SkMixerColorFilter::CreateProc(SkReadBuffer& buffer) { |
| sk_sp<SkColorFilter> cf0(buffer.readColorFilter()); |
| sk_sp<SkColorFilter> cf1(buffer.readColorFilter()); |
| const float weight = buffer.readScalar(); |
| return SkColorFilters::Lerp(weight, std::move(cf0), std::move(cf1)); |
| } |
| |
| sk_sp<SkColorFilter> SkColorFilters::Lerp(float weight, sk_sp<SkColorFilter> cf0, |
| sk_sp<SkColorFilter> cf1) { |
| if (!cf0 && !cf1) { |
| return nullptr; |
| } |
| if (SkScalarIsNaN(weight)) { |
| return nullptr; |
| } |
| |
| if (cf0 == cf1) { |
| return cf0; // or cf1 |
| } |
| |
| if (weight <= 0) { |
| return cf0; |
| } |
| if (weight >= 1) { |
| return cf1; |
| } |
| |
| return sk_sp<SkColorFilter>(cf0 |
| ? new SkMixerColorFilter(std::move(cf0), std::move(cf1), weight) |
| : new SkMixerColorFilter(std::move(cf1), nullptr, 1 - weight)); |
| } |
| |
| /////////////////////////////////////////////////////////////////////////////////////////////////// |
| |
| #include "src/core/SkModeColorFilter.h" |
| |
| void SkColorFilterBase::RegisterFlattenables() { |
| SK_REGISTER_FLATTENABLE(SkComposeColorFilter); |
| SK_REGISTER_FLATTENABLE(SkModeColorFilter); |
| SK_REGISTER_FLATTENABLE(SkSRGBGammaColorFilter); |
| SK_REGISTER_FLATTENABLE(SkMixerColorFilter); |
| } |