| /* |
| * Copyright 2021 Google LLC. |
| * |
| * Use of this source code is governed by a BSD-style license that can be |
| * found in the LICENSE file. |
| */ |
| |
| #ifndef PathTessellateOp_DEFINED |
| #define PathTessellateOp_DEFINED |
| |
| #include "src/gpu/ganesh/ops/GrDrawOp.h" |
| #include "src/gpu/ganesh/tessellate/GrTessellationShader.h" |
| #include "src/gpu/ganesh/tessellate/PathTessellator.h" |
| #include "src/gpu/tessellate/Tessellation.h" |
| |
| namespace skgpu::ganesh { |
| |
| // Tessellates a path directly to the color buffer, using one single render pass. This currently |
| // only works for convex paths. |
| class PathTessellateOp final : public GrDrawOp { |
| private: |
| DEFINE_OP_CLASS_ID |
| |
| using PatchAttribs = PathTessellator::PatchAttribs; |
| using PathDrawList = PathTessellator::PathDrawList; |
| |
| PathTessellateOp(SkArenaAlloc* arena, |
| GrAAType aaType, |
| const GrUserStencilSettings* stencil, |
| const SkMatrix& viewMatrix, |
| const SkPath& path, |
| GrPaint&& paint, |
| const SkRect& drawBounds) |
| : GrDrawOp(ClassID()) |
| , fAAType(aaType) |
| , fStencil(stencil) |
| , fTotalCombinedPathVerbCnt(path.countVerbs()) |
| , fPathDrawList(arena->make<PathDrawList>(SkMatrix::I(), path, paint.getColor4f())) |
| , fPathDrawTail(&fPathDrawList->fNext) |
| , fProcessors(std::move(paint)) |
| , fShaderMatrix(viewMatrix) { |
| SkASSERT(!path.isInverseFillType()); |
| if (!this->headDraw().fColor.fitsInBytes()) { |
| fPatchAttribs |= PatchAttribs::kWideColorIfEnabled; |
| } |
| this->setBounds(drawBounds, HasAABloat::kNo, IsHairline::kNo); |
| } |
| |
| PathDrawList& headDraw() { return *fPathDrawList; } |
| |
| void prepareTessellator(const GrTessellationShader::ProgramArgs&, GrAppliedClip&& clip); |
| |
| // GrDrawOp overrides. |
| const char* name() const override { return "PathTessellateOp"; } |
| bool usesMSAA() const override { return fAAType == GrAAType::kMSAA; } |
| void visitProxies(const GrVisitProxyFunc&) const override; |
| GrProcessorSet::Analysis finalize(const GrCaps&, const GrAppliedClip*, GrClampType) override; |
| bool usesStencil() const override { return !fStencil->isUnused(); } |
| CombineResult onCombineIfPossible(GrOp*, SkArenaAlloc*, const GrCaps&) override; |
| void onPrePrepare(GrRecordingContext*, const GrSurfaceProxyView&, GrAppliedClip*, |
| const GrDstProxyView&, GrXferBarrierFlags, GrLoadOp colorLoadOp) override; |
| void onPrepare(GrOpFlushState*) override; |
| void onExecute(GrOpFlushState*, const SkRect& chainBounds) override; |
| |
| const GrAAType fAAType; |
| const GrUserStencilSettings* const fStencil; |
| int fTotalCombinedPathVerbCnt; |
| PatchAttribs fPatchAttribs = PatchAttribs::kNone; |
| PathDrawList* const fPathDrawList; |
| PathDrawList** fPathDrawTail; |
| GrProcessorSet fProcessors; |
| SkMatrix fShaderMatrix; |
| |
| // Decided during prepareTessellator. |
| PathTessellator* fTessellator = nullptr; |
| const GrProgramInfo* fTessellationProgram = nullptr; |
| |
| friend class GrOp; // For ctor. |
| }; |
| |
| } // namespace skgpu::ganesh |
| |
| #endif // PathTessellateOp_DEFINED |