| /* |
| * Copyright 2019 Google LLC. |
| * |
| * Use of this source code is governed by a BSD-style license that can be |
| * found in the LICENSE file. |
| */ |
| |
| #ifndef GrStencilAtlasOp_DEFINED |
| #define GrStencilAtlasOp_DEFINED |
| |
| #include "src/gpu/GrMemoryPool.h" |
| #include "src/gpu/ccpr/GrCCFiller.h" |
| #include "src/gpu/ccpr/GrCCStroker.h" |
| #include "src/gpu/ops/GrDrawOp.h" |
| |
| class GrCCPerFlushResources; |
| |
| // Renders literal A8 coverage to a CCPR atlas using an intermediate MSAA stencil buffer. |
| class GrStencilAtlasOp : public GrDrawOp { |
| public: |
| DEFINE_OP_CLASS_ID |
| |
| using FillBatchID = GrCCFiller::BatchID; |
| using StrokeBatchID = GrCCStroker::BatchID; |
| |
| // Once all the paths in an atlas have been drawn to the stencil buffer, we make a final pass |
| // where we draw "resolve" rects over each path whose purpose is to convert winding counts to A8 |
| // coverage. |
| struct ResolveRectInstance { |
| int16_t l, t, r, b; |
| }; |
| |
| // GrDrawOp interface. |
| const char* name() const override { return "StencilAtlasOp (CCPR)"; } |
| FixedFunctionFlags fixedFunctionFlags() const override { |
| return FixedFunctionFlags::kUsesHWAA | FixedFunctionFlags::kUsesStencil; |
| } |
| |
| GrProcessorSet::Analysis finalize(const GrCaps&, const GrAppliedClip*, |
| bool hasMixedSampledCoverage, GrClampType) override { |
| return GrProcessorSet::EmptySetAnalysis(); |
| } |
| CombineResult onCombineIfPossible(GrOp* other, const GrCaps&) override { |
| // We will only make multiple copy ops if they have different source proxies. |
| // TODO: make use of texture chaining. |
| return CombineResult::kCannotCombine; |
| } |
| void onPrepare(GrOpFlushState*) override {} |
| |
| static std::unique_ptr<GrDrawOp> Make( |
| GrRecordingContext*, sk_sp<const GrCCPerFlushResources>, FillBatchID, StrokeBatchID, |
| int baseStencilResolveInstance, int endStencilResolveInstance, |
| const SkISize& drawBounds); |
| |
| void onExecute(GrOpFlushState* flushState, const SkRect& chainBounds) override; |
| |
| private: |
| friend class ::GrOpMemoryPool; // for ctor |
| |
| GrStencilAtlasOp(sk_sp<const GrCCPerFlushResources> resources, FillBatchID fillBatchID, |
| StrokeBatchID strokeBatchID, int baseStencilResolveInstance, |
| int endStencilResolveInstance, const SkISize& drawBounds) |
| : GrDrawOp(ClassID()) |
| , fResources(std::move(resources)) |
| , fFillBatchID(fillBatchID) |
| , fStrokeBatchID(strokeBatchID) |
| , fBaseStencilResolveInstance(baseStencilResolveInstance) |
| , fEndStencilResolveInstance(endStencilResolveInstance) |
| , fDrawBounds(drawBounds) { |
| this->setBounds(SkRect::MakeIWH(fDrawBounds.width(), fDrawBounds.height()), |
| GrOp::HasAABloat::kNo, GrOp::IsHairline::kNo); |
| } |
| |
| const sk_sp<const GrCCPerFlushResources> fResources; |
| const FillBatchID fFillBatchID; |
| const StrokeBatchID fStrokeBatchID; |
| const int fBaseStencilResolveInstance; |
| const int fEndStencilResolveInstance; |
| const SkISize fDrawBounds; |
| int fResolveBaseVertex; |
| }; |
| |
| |
| #endif |