| /* |
| * Copyright 2020 Google LLC. |
| * |
| * Use of this source code is governed by a BSD-style license that can be |
| * found in the LICENSE file. |
| */ |
| |
| #include "src/gpu/ganesh/ops/StrokeTessellateOp.h" |
| |
| #include "src/core/SkMathPriv.h" |
| #include "src/core/SkPathPriv.h" |
| #include "src/gpu/ganesh/GrAppliedClip.h" |
| #include "src/gpu/ganesh/GrOpFlushState.h" |
| #include "src/gpu/ganesh/GrRecordingContextPriv.h" |
| #include "src/gpu/ganesh/tessellate/GrStrokeTessellationShader.h" |
| |
| namespace skgpu::v1 { |
| |
| StrokeTessellateOp::StrokeTessellateOp(GrAAType aaType, const SkMatrix& viewMatrix, |
| const SkPath& path, const SkStrokeRec& stroke, |
| GrPaint&& paint) |
| : GrDrawOp(ClassID()) |
| , fAAType(aaType) |
| , fViewMatrix(viewMatrix) |
| , fPathStrokeList(path, stroke, paint.getColor4f()) |
| , fTotalCombinedVerbCnt(path.countVerbs()) |
| , fProcessors(std::move(paint)) { |
| if (!this->headColor().fitsInBytes()) { |
| fPatchAttribs |= PatchAttribs::kWideColorIfEnabled; |
| } |
| SkRect devBounds = path.getBounds(); |
| if (!this->headStroke().isHairlineStyle()) { |
| // Non-hairlines inflate in local path space (pre-transform). |
| float r = stroke.getInflationRadius(); |
| devBounds.outset(r, r); |
| } |
| viewMatrix.mapRect(&devBounds, devBounds); |
| if (this->headStroke().isHairlineStyle()) { |
| // Hairlines inflate in device space (post-transform). |
| float r = SkStrokeRec::GetInflationRadius(stroke.getJoin(), stroke.getMiter(), |
| stroke.getCap(), 1); |
| devBounds.outset(r, r); |
| } |
| this->setBounds(devBounds, HasAABloat::kNo, IsHairline::kNo); |
| } |
| |
| void StrokeTessellateOp::visitProxies(const GrVisitProxyFunc& func) const { |
| if (fFillProgram) { |
| fFillProgram->visitFPProxies(func); |
| } else if (fStencilProgram) { |
| fStencilProgram->visitFPProxies(func); |
| } else { |
| fProcessors.visitProxies(func); |
| } |
| } |
| |
| GrProcessorSet::Analysis StrokeTessellateOp::finalize(const GrCaps& caps, |
| const GrAppliedClip* clip, |
| GrClampType clampType) { |
| // Make sure the finalize happens before combining. We might change fNeedsStencil here. |
| SkASSERT(fPathStrokeList.fNext == nullptr); |
| if (!caps.shaderCaps()->fInfinitySupport) { |
| // The GPU can't infer curve type based in infinity, so we need to send in an attrib |
| // explicitly stating the curve type. |
| fPatchAttribs |= PatchAttribs::kExplicitCurveType; |
| } |
| const GrProcessorSet::Analysis& analysis = fProcessors.finalize( |
| this->headColor(), GrProcessorAnalysisCoverage::kNone, clip, |
| &GrUserStencilSettings::kUnused, caps, clampType, &this->headColor()); |
| fNeedsStencil = !analysis.unaffectedByDstValue(); |
| return analysis; |
| } |
| |
| GrOp::CombineResult StrokeTessellateOp::onCombineIfPossible(GrOp* grOp, SkArenaAlloc* alloc, |
| const GrCaps& caps) { |
| SkASSERT(grOp->classID() == this->classID()); |
| auto* op = static_cast<StrokeTessellateOp*>(grOp); |
| |
| // This must be called after finalize(). fNeedsStencil can change in finalize(). |
| SkASSERT(fProcessors.isFinalized()); |
| SkASSERT(op->fProcessors.isFinalized()); |
| |
| if (fNeedsStencil || |
| op->fNeedsStencil || |
| fViewMatrix != op->fViewMatrix || |
| fAAType != op->fAAType || |
| fProcessors != op->fProcessors || |
| this->headStroke().isHairlineStyle() != op->headStroke().isHairlineStyle()) { |
| return CombineResult::kCannotCombine; |
| } |
| |
| auto combinedAttribs = fPatchAttribs | op->fPatchAttribs; |
| if (!(combinedAttribs & PatchAttribs::kStrokeParams) && |
| !tess::StrokesHaveEqualParams(this->headStroke(), op->headStroke())) { |
| // The paths have different stroke properties. We will need to enable dynamic stroke if we |
| // still decide to combine them. |
| if (this->headStroke().isHairlineStyle()) { |
| return CombineResult::kCannotCombine; // Dynamic hairlines aren't supported. |
| } |
| combinedAttribs |= PatchAttribs::kStrokeParams; |
| } |
| if (!(combinedAttribs & PatchAttribs::kColor) && this->headColor() != op->headColor()) { |
| // The paths have different colors. We will need to enable dynamic color if we still decide |
| // to combine them. |
| combinedAttribs |= PatchAttribs::kColor; |
| } |
| |
| // Don't actually enable new dynamic state on ops that already have lots of verbs. |
| constexpr static GrTFlagsMask<PatchAttribs> kDynamicStatesMask(PatchAttribs::kStrokeParams | |
| PatchAttribs::kColor); |
| PatchAttribs neededDynamicStates = combinedAttribs & kDynamicStatesMask; |
| if (neededDynamicStates != PatchAttribs::kNone) { |
| if (!this->shouldUseDynamicStates(neededDynamicStates) || |
| !op->shouldUseDynamicStates(neededDynamicStates)) { |
| return CombineResult::kCannotCombine; |
| } |
| } |
| |
| fPatchAttribs = combinedAttribs; |
| |
| // Concat the op's PathStrokeList. Since the head element is allocated inside the op, we need to |
| // copy it. |
| auto* headCopy = alloc->make<PathStrokeList>(std::move(op->fPathStrokeList)); |
| *fPathStrokeTail = headCopy; |
| fPathStrokeTail = (op->fPathStrokeTail == &op->fPathStrokeList.fNext) ? &headCopy->fNext |
| : op->fPathStrokeTail; |
| |
| fTotalCombinedVerbCnt += op->fTotalCombinedVerbCnt; |
| return CombineResult::kMerged; |
| } |
| |
| // Marks every stencil value as "1". |
| constexpr static GrUserStencilSettings kMarkStencil( |
| GrUserStencilSettings::StaticInit< |
| 0x0001, |
| GrUserStencilTest::kLessIfInClip, // Match kTestAndResetStencil. |
| 0x0000, // Always fail. |
| GrUserStencilOp::kZero, |
| GrUserStencilOp::kReplace, |
| 0xffff>()); |
| |
| // Passes if the stencil value is nonzero. Also resets the stencil value to zero on pass. This is |
| // formulated to match kMarkStencil everywhere except the ref and compare mask. This will allow us |
| // to use the same pipeline for both stencil and fill if dynamic stencil state is supported. |
| constexpr static GrUserStencilSettings kTestAndResetStencil( |
| GrUserStencilSettings::StaticInit< |
| 0x0000, |
| GrUserStencilTest::kLessIfInClip, // i.e., "not equal to zero, if in clip". |
| 0x0001, |
| GrUserStencilOp::kZero, |
| GrUserStencilOp::kReplace, |
| 0xffff>()); |
| |
| void StrokeTessellateOp::prePrepareTessellator(GrTessellationShader::ProgramArgs&& args, |
| GrAppliedClip&& clip) { |
| SkASSERT(!fTessellator); |
| SkASSERT(!fFillProgram); |
| SkASSERT(!fStencilProgram); |
| // GrOp::setClippedBounds() should have been called by now. |
| SkASSERT(SkRect::MakeIWH(args.fWriteView.width(), |
| args.fWriteView.height()).contains(this->bounds())); |
| |
| const GrCaps& caps = *args.fCaps; |
| SkArenaAlloc* arena = args.fArena; |
| |
| auto* pipeline = GrTessellationShader::MakePipeline(args, fAAType, std::move(clip), |
| std::move(fProcessors)); |
| |
| fTessellator = arena->make<StrokeTessellator>(fPatchAttribs); |
| fTessellationShader = args.fArena->make<GrStrokeTessellationShader>( |
| *caps.shaderCaps(), |
| fPatchAttribs, |
| fViewMatrix, |
| this->headStroke(), |
| this->headColor()); |
| |
| auto fillStencil = &GrUserStencilSettings::kUnused; |
| if (fNeedsStencil) { |
| fStencilProgram = GrTessellationShader::MakeProgram(args, fTessellationShader, pipeline, |
| &kMarkStencil); |
| fillStencil = &kTestAndResetStencil; |
| // TODO: Currently if we have a texture barrier for a dst read it will get put in before |
| // both the stencil draw and the fill draw. In reality we only really need the barrier |
| // once to guard the reads of the color buffer in the fill from the previous writes. Maybe |
| // we can investigate how to remove one of these barriers but it is probably not something |
| // that is required a lot and thus the extra barrier shouldn't be too much of a perf hit to |
| // general Skia use. |
| } |
| |
| fFillProgram = GrTessellationShader::MakeProgram(args, fTessellationShader, pipeline, |
| fillStencil); |
| } |
| |
| void StrokeTessellateOp::onPrePrepare(GrRecordingContext* context, |
| const GrSurfaceProxyView& writeView, GrAppliedClip* clip, |
| const GrDstProxyView& dstProxyView, |
| GrXferBarrierFlags renderPassXferBarriers, GrLoadOp |
| colorLoadOp) { |
| // DMSAA is not supported on DDL. |
| bool usesMSAASurface = writeView.asRenderTargetProxy()->numSamples() > 1; |
| this->prePrepareTessellator({context->priv().recordTimeAllocator(), writeView, usesMSAASurface, |
| &dstProxyView, renderPassXferBarriers, colorLoadOp, |
| context->priv().caps()}, |
| (clip) ? std::move(*clip) : GrAppliedClip::Disabled()); |
| if (fStencilProgram) { |
| context->priv().recordProgramInfo(fStencilProgram); |
| } |
| if (fFillProgram) { |
| context->priv().recordProgramInfo(fFillProgram); |
| } |
| } |
| |
| void StrokeTessellateOp::onPrepare(GrOpFlushState* flushState) { |
| if (!fTessellator) { |
| this->prePrepareTessellator({flushState->allocator(), flushState->writeView(), |
| flushState->usesMSAASurface(), &flushState->dstProxyView(), |
| flushState->renderPassBarriers(), flushState->colorLoadOp(), |
| &flushState->caps()}, flushState->detachAppliedClip()); |
| } |
| SkASSERT(fTessellator); |
| fTessellator->prepare(flushState, |
| fViewMatrix, |
| &fPathStrokeList, |
| fTotalCombinedVerbCnt); |
| } |
| |
| void StrokeTessellateOp::onExecute(GrOpFlushState* flushState, const SkRect& chainBounds) { |
| if (fStencilProgram) { |
| flushState->bindPipelineAndScissorClip(*fStencilProgram, chainBounds); |
| flushState->bindTextures(fStencilProgram->geomProc(), nullptr, fStencilProgram->pipeline()); |
| fTessellator->draw(flushState); |
| } |
| if (fFillProgram) { |
| flushState->bindPipelineAndScissorClip(*fFillProgram, chainBounds); |
| flushState->bindTextures(fFillProgram->geomProc(), nullptr, fFillProgram->pipeline()); |
| fTessellator->draw(flushState); |
| } |
| } |
| |
| } // namespace skgpu::v1 |
