| /* |
| * 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 "include/core/SkString.h" |
| #include "src/core/SkGeometry.h" |
| #include "src/core/SkPathPriv.h" |
| #include "src/core/SkTraceEvent.h" |
| #include "src/gpu/GrAuditTrail.h" |
| #include "src/gpu/GrCaps.h" |
| #include "src/gpu/GrDefaultGeoProcFactory.h" |
| #include "src/gpu/GrDrawOpTest.h" |
| #include "src/gpu/GrGeometryProcessor.h" |
| #include "src/gpu/GrOpFlushState.h" |
| #include "src/gpu/GrProcessor.h" |
| #include "src/gpu/GrProgramInfo.h" |
| #include "src/gpu/GrStyle.h" |
| #include "src/gpu/GrSurfaceDrawContext.h" |
| #include "src/gpu/GrVertexWriter.h" |
| #include "src/gpu/geometry/GrPathUtils.h" |
| #include "src/gpu/geometry/GrStyledShape.h" |
| #include "src/gpu/glsl/GrGLSLGeometryProcessor.h" |
| #include "src/gpu/ops/GrAAConvexTessellator.h" |
| #include "src/gpu/ops/GrAALinearizingConvexPathRenderer.h" |
| #include "src/gpu/ops/GrMeshDrawOp.h" |
| #include "src/gpu/ops/GrSimpleMeshDrawOpHelperWithStencil.h" |
| |
| static const int DEFAULT_BUFFER_SIZE = 100; |
| |
| // The thicker the stroke, the harder it is to produce high-quality results using tessellation. For |
| // the time being, we simply drop back to software rendering above this stroke width. |
| static const SkScalar kMaxStrokeWidth = 20.0; |
| |
| GrAALinearizingConvexPathRenderer::GrAALinearizingConvexPathRenderer() = default; |
| |
| /////////////////////////////////////////////////////////////////////////////// |
| |
| GrPathRenderer::CanDrawPath |
| GrAALinearizingConvexPathRenderer::onCanDrawPath(const CanDrawPathArgs& args) const { |
| if (GrAAType::kCoverage != args.fAAType) { |
| return CanDrawPath::kNo; |
| } |
| if (!args.fShape->knownToBeConvex()) { |
| return CanDrawPath::kNo; |
| } |
| if (args.fShape->style().pathEffect()) { |
| return CanDrawPath::kNo; |
| } |
| if (args.fShape->inverseFilled()) { |
| return CanDrawPath::kNo; |
| } |
| if (args.fShape->bounds().width() <= 0 && args.fShape->bounds().height() <= 0) { |
| // Stroked zero length lines should draw, but this PR doesn't handle that case |
| return CanDrawPath::kNo; |
| } |
| const SkStrokeRec& stroke = args.fShape->style().strokeRec(); |
| |
| if (stroke.getStyle() == SkStrokeRec::kStroke_Style || |
| stroke.getStyle() == SkStrokeRec::kStrokeAndFill_Style) { |
| if (!args.fViewMatrix->isSimilarity()) { |
| return CanDrawPath::kNo; |
| } |
| SkScalar strokeWidth = args.fViewMatrix->getMaxScale() * stroke.getWidth(); |
| if (strokeWidth < 1.0f && stroke.getStyle() == SkStrokeRec::kStroke_Style) { |
| return CanDrawPath::kNo; |
| } |
| if (strokeWidth > kMaxStrokeWidth || |
| !args.fShape->knownToBeClosed() || |
| stroke.getJoin() == SkPaint::Join::kRound_Join) { |
| return CanDrawPath::kNo; |
| } |
| return CanDrawPath::kYes; |
| } |
| if (stroke.getStyle() != SkStrokeRec::kFill_Style) { |
| return CanDrawPath::kNo; |
| } |
| // This can almost handle perspective. It would need to use 3 component explicit local coords |
| // when there are FPs that require them. This is difficult to test because AAConvexPathRenderer |
| // takes almost all filled paths that could get here. So just avoid perspective fills. |
| if (args.fViewMatrix->hasPerspective()) { |
| return CanDrawPath::kNo; |
| } |
| return CanDrawPath::kYes; |
| } |
| |
| // extract the result vertices and indices from the GrAAConvexTessellator |
| static void extract_verts(const GrAAConvexTessellator& tess, |
| const SkMatrix* localCoordsMatrix, |
| void* vertData, |
| const GrVertexColor& color, |
| uint16_t firstIndex, |
| uint16_t* idxs) { |
| GrVertexWriter verts{vertData}; |
| for (int i = 0; i < tess.numPts(); ++i) { |
| SkPoint lc; |
| if (localCoordsMatrix) { |
| localCoordsMatrix->mapPoints(&lc, &tess.point(i), 1); |
| } |
| verts.write(tess.point(i), color, GrVertexWriter::If(localCoordsMatrix, lc), |
| tess.coverage(i)); |
| } |
| |
| for (int i = 0; i < tess.numIndices(); ++i) { |
| idxs[i] = tess.index(i) + firstIndex; |
| } |
| } |
| |
| static GrGeometryProcessor* create_lines_only_gp(SkArenaAlloc* arena, |
| bool tweakAlphaForCoverage, |
| bool usesLocalCoords, |
| bool wideColor) { |
| using namespace GrDefaultGeoProcFactory; |
| |
| Coverage::Type coverageType = |
| tweakAlphaForCoverage ? Coverage::kAttributeTweakAlpha_Type : Coverage::kAttribute_Type; |
| LocalCoords::Type localCoordsType = |
| usesLocalCoords ? LocalCoords::kHasExplicit_Type : LocalCoords::kUnused_Type; |
| Color::Type colorType = |
| wideColor ? Color::kPremulWideColorAttribute_Type : Color::kPremulGrColorAttribute_Type; |
| |
| return Make(arena, colorType, coverageType, localCoordsType, SkMatrix::I()); |
| } |
| |
| namespace { |
| |
| class AAFlatteningConvexPathOp final : public GrMeshDrawOp { |
| private: |
| using Helper = GrSimpleMeshDrawOpHelperWithStencil; |
| |
| public: |
| DEFINE_OP_CLASS_ID |
| |
| static GrOp::Owner Make(GrRecordingContext* context, |
| GrPaint&& paint, |
| const SkMatrix& viewMatrix, |
| const SkPath& path, |
| SkScalar strokeWidth, |
| SkStrokeRec::Style style, |
| SkPaint::Join join, |
| SkScalar miterLimit, |
| const GrUserStencilSettings* stencilSettings) { |
| return Helper::FactoryHelper<AAFlatteningConvexPathOp>(context, std::move(paint), |
| viewMatrix, path, |
| strokeWidth, style, join, miterLimit, |
| stencilSettings); |
| } |
| |
| AAFlatteningConvexPathOp(GrProcessorSet* processorSet, |
| const SkPMColor4f& color, |
| const SkMatrix& viewMatrix, |
| const SkPath& path, |
| SkScalar strokeWidth, |
| SkStrokeRec::Style style, |
| SkPaint::Join join, |
| SkScalar miterLimit, |
| const GrUserStencilSettings* stencilSettings) |
| : INHERITED(ClassID()), fHelper(processorSet, GrAAType::kCoverage, stencilSettings) { |
| fPaths.emplace_back( |
| PathData{viewMatrix, path, color, strokeWidth, miterLimit, style, join}); |
| |
| // compute bounds |
| SkRect bounds = path.getBounds(); |
| SkScalar w = strokeWidth; |
| if (w > 0) { |
| w /= 2; |
| SkScalar maxScale = viewMatrix.getMaxScale(); |
| // We should not have a perspective matrix, thus we should have a valid scale. |
| SkASSERT(maxScale != -1); |
| if (SkPaint::kMiter_Join == join && w * maxScale > 1.f) { |
| w *= miterLimit; |
| } |
| bounds.outset(w, w); |
| } |
| this->setTransformedBounds(bounds, viewMatrix, HasAABloat::kYes, IsHairline::kNo); |
| } |
| |
| const char* name() const override { return "AAFlatteningConvexPathOp"; } |
| |
| void visitProxies(const VisitProxyFunc& func) const override { |
| if (fProgramInfo) { |
| fProgramInfo->visitFPProxies(func); |
| } else { |
| fHelper.visitProxies(func); |
| } |
| } |
| |
| FixedFunctionFlags fixedFunctionFlags() const override { return fHelper.fixedFunctionFlags(); } |
| |
| GrProcessorSet::Analysis finalize( |
| const GrCaps& caps, const GrAppliedClip* clip, bool hasMixedSampledCoverage, |
| GrClampType clampType) override { |
| return fHelper.finalizeProcessors( |
| caps, clip, hasMixedSampledCoverage, clampType, |
| GrProcessorAnalysisCoverage::kSingleChannel, &fPaths.back().fColor, &fWideColor); |
| } |
| |
| private: |
| GrProgramInfo* programInfo() override { return fProgramInfo; } |
| |
| void onCreateProgramInfo(const GrCaps* caps, |
| SkArenaAlloc* arena, |
| const GrSurfaceProxyView& writeView, |
| GrAppliedClip&& appliedClip, |
| const GrXferProcessor::DstProxyView& dstProxyView, |
| GrXferBarrierFlags renderPassXferBarriers, |
| GrLoadOp colorLoadOp) override { |
| GrGeometryProcessor* gp = create_lines_only_gp(arena, |
| fHelper.compatibleWithCoverageAsAlpha(), |
| fHelper.usesLocalCoords(), |
| fWideColor); |
| if (!gp) { |
| SkDebugf("Couldn't create a GrGeometryProcessor\n"); |
| return; |
| } |
| |
| fProgramInfo = fHelper.createProgramInfoWithStencil(caps, arena, writeView, |
| std::move(appliedClip), dstProxyView, |
| gp, GrPrimitiveType::kTriangles, |
| renderPassXferBarriers, colorLoadOp); |
| } |
| |
| void recordDraw(Target* target, |
| int vertexCount, size_t vertexStride, void* vertices, |
| int indexCount, uint16_t* indices) { |
| if (vertexCount == 0 || indexCount == 0) { |
| return; |
| } |
| sk_sp<const GrBuffer> vertexBuffer; |
| int firstVertex; |
| void* verts = target->makeVertexSpace(vertexStride, vertexCount, &vertexBuffer, |
| &firstVertex); |
| if (!verts) { |
| SkDebugf("Could not allocate vertices\n"); |
| return; |
| } |
| memcpy(verts, vertices, vertexCount * vertexStride); |
| |
| sk_sp<const GrBuffer> indexBuffer; |
| int firstIndex; |
| uint16_t* idxs = target->makeIndexSpace(indexCount, &indexBuffer, &firstIndex); |
| if (!idxs) { |
| SkDebugf("Could not allocate indices\n"); |
| return; |
| } |
| memcpy(idxs, indices, indexCount * sizeof(uint16_t)); |
| GrSimpleMesh* mesh = target->allocMesh(); |
| mesh->setIndexed(std::move(indexBuffer), indexCount, firstIndex, 0, vertexCount - 1, |
| GrPrimitiveRestart::kNo, std::move(vertexBuffer), firstVertex); |
| fMeshes.push_back(mesh); |
| } |
| |
| void onPrepareDraws(Target* target) override { |
| if (!fProgramInfo) { |
| this->createProgramInfo(target); |
| if (!fProgramInfo) { |
| return; |
| } |
| } |
| |
| size_t vertexStride = fProgramInfo->geomProc().vertexStride(); |
| int instanceCount = fPaths.count(); |
| |
| int64_t vertexCount = 0; |
| int64_t indexCount = 0; |
| int64_t maxVertices = DEFAULT_BUFFER_SIZE; |
| int64_t maxIndices = DEFAULT_BUFFER_SIZE; |
| uint8_t* vertices = (uint8_t*) sk_malloc_throw(maxVertices * vertexStride); |
| uint16_t* indices = (uint16_t*) sk_malloc_throw(maxIndices * sizeof(uint16_t)); |
| for (int i = 0; i < instanceCount; i++) { |
| const PathData& args = fPaths[i]; |
| GrAAConvexTessellator tess(args.fStyle, args.fStrokeWidth, |
| args.fJoin, args.fMiterLimit); |
| |
| if (!tess.tessellate(args.fViewMatrix, args.fPath)) { |
| continue; |
| } |
| |
| int currentVertices = tess.numPts(); |
| if (vertexCount + currentVertices > static_cast<int>(UINT16_MAX)) { |
| // if we added the current instance, we would overflow the indices we can store in a |
| // uint16_t. Draw what we've got so far and reset. |
| this->recordDraw(target, vertexCount, vertexStride, vertices, indexCount, indices); |
| vertexCount = 0; |
| indexCount = 0; |
| } |
| if (vertexCount + currentVertices > maxVertices) { |
| maxVertices = std::max(vertexCount + currentVertices, maxVertices * 2); |
| if (maxVertices * vertexStride > SK_MaxS32) { |
| sk_free(vertices); |
| sk_free(indices); |
| return; |
| } |
| vertices = (uint8_t*) sk_realloc_throw(vertices, maxVertices * vertexStride); |
| } |
| int currentIndices = tess.numIndices(); |
| if (indexCount + currentIndices > maxIndices) { |
| maxIndices = std::max(indexCount + currentIndices, maxIndices * 2); |
| if (maxIndices * sizeof(uint16_t) > SK_MaxS32) { |
| sk_free(vertices); |
| sk_free(indices); |
| return; |
| } |
| indices = (uint16_t*) sk_realloc_throw(indices, maxIndices * sizeof(uint16_t)); |
| } |
| |
| const SkMatrix* localCoordsMatrix = nullptr; |
| SkMatrix ivm; |
| if (fHelper.usesLocalCoords()) { |
| if (!args.fViewMatrix.invert(&ivm)) { |
| ivm = SkMatrix::I(); |
| } |
| localCoordsMatrix = &ivm; |
| } |
| |
| extract_verts(tess, localCoordsMatrix, vertices + vertexStride * vertexCount, |
| GrVertexColor(args.fColor, fWideColor), vertexCount, |
| indices + indexCount); |
| vertexCount += currentVertices; |
| indexCount += currentIndices; |
| } |
| if (vertexCount <= SK_MaxS32 && indexCount <= SK_MaxS32) { |
| this->recordDraw(target, vertexCount, vertexStride, vertices, indexCount, indices); |
| } |
| sk_free(vertices); |
| sk_free(indices); |
| } |
| |
| void onExecute(GrOpFlushState* flushState, const SkRect& chainBounds) override { |
| if (!fProgramInfo || fMeshes.isEmpty()) { |
| return; |
| } |
| |
| flushState->bindPipelineAndScissorClip(*fProgramInfo, chainBounds); |
| flushState->bindTextures(fProgramInfo->geomProc(), nullptr, fProgramInfo->pipeline()); |
| for (int i = 0; i < fMeshes.count(); ++i) { |
| flushState->drawMesh(*fMeshes[i]); |
| } |
| } |
| |
| CombineResult onCombineIfPossible(GrOp* t, SkArenaAlloc*, const GrCaps& caps) override { |
| AAFlatteningConvexPathOp* that = t->cast<AAFlatteningConvexPathOp>(); |
| if (!fHelper.isCompatible(that->fHelper, caps, this->bounds(), that->bounds())) { |
| return CombineResult::kCannotCombine; |
| } |
| |
| fPaths.push_back_n(that->fPaths.count(), that->fPaths.begin()); |
| fWideColor |= that->fWideColor; |
| return CombineResult::kMerged; |
| } |
| |
| #if GR_TEST_UTILS |
| SkString onDumpInfo() const override { |
| SkString string; |
| for (const auto& path : fPaths) { |
| string.appendf( |
| "Color: 0x%08x, StrokeWidth: %.2f, Style: %d, Join: %d, " |
| "MiterLimit: %.2f\n", |
| path.fColor.toBytes_RGBA(), path.fStrokeWidth, path.fStyle, path.fJoin, |
| path.fMiterLimit); |
| } |
| string += fHelper.dumpInfo(); |
| return string; |
| } |
| #endif |
| |
| struct PathData { |
| SkMatrix fViewMatrix; |
| SkPath fPath; |
| SkPMColor4f fColor; |
| SkScalar fStrokeWidth; |
| SkScalar fMiterLimit; |
| SkStrokeRec::Style fStyle; |
| SkPaint::Join fJoin; |
| }; |
| |
| SkSTArray<1, PathData, true> fPaths; |
| Helper fHelper; |
| bool fWideColor; |
| |
| SkTDArray<GrSimpleMesh*> fMeshes; |
| GrProgramInfo* fProgramInfo = nullptr; |
| |
| using INHERITED = GrMeshDrawOp; |
| }; |
| |
| } // anonymous namespace |
| |
| bool GrAALinearizingConvexPathRenderer::onDrawPath(const DrawPathArgs& args) { |
| GR_AUDIT_TRAIL_AUTO_FRAME(args.fRenderTargetContext->auditTrail(), |
| "GrAALinearizingConvexPathRenderer::onDrawPath"); |
| SkASSERT(args.fRenderTargetContext->numSamples() <= 1); |
| SkASSERT(!args.fShape->isEmpty()); |
| SkASSERT(!args.fShape->style().pathEffect()); |
| |
| SkPath path; |
| args.fShape->asPath(&path); |
| bool fill = args.fShape->style().isSimpleFill(); |
| const SkStrokeRec& stroke = args.fShape->style().strokeRec(); |
| SkScalar strokeWidth = fill ? -1.0f : stroke.getWidth(); |
| SkPaint::Join join = fill ? SkPaint::Join::kMiter_Join : stroke.getJoin(); |
| SkScalar miterLimit = stroke.getMiter(); |
| |
| GrOp::Owner op = AAFlatteningConvexPathOp::Make( |
| args.fContext, std::move(args.fPaint), *args.fViewMatrix, path, strokeWidth, |
| stroke.getStyle(), join, miterLimit, args.fUserStencilSettings); |
| args.fRenderTargetContext->addDrawOp(args.fClip, std::move(op)); |
| return true; |
| } |
| |
| /////////////////////////////////////////////////////////////////////////////////////////////////// |
| |
| #if GR_TEST_UTILS |
| |
| GR_DRAW_OP_TEST_DEFINE(AAFlatteningConvexPathOp) { |
| SkMatrix viewMatrix = GrTest::TestMatrixPreservesRightAngles(random); |
| const SkPath& path = GrTest::TestPathConvex(random); |
| |
| SkStrokeRec::Style styles[3] = { SkStrokeRec::kFill_Style, |
| SkStrokeRec::kStroke_Style, |
| SkStrokeRec::kStrokeAndFill_Style }; |
| |
| SkStrokeRec::Style style = styles[random->nextU() % 3]; |
| |
| SkScalar strokeWidth = -1.f; |
| SkPaint::Join join = SkPaint::kMiter_Join; |
| SkScalar miterLimit = 0.5f; |
| |
| if (SkStrokeRec::kFill_Style != style) { |
| strokeWidth = random->nextRangeF(1.0f, 10.0f); |
| if (random->nextBool()) { |
| join = SkPaint::kMiter_Join; |
| } else { |
| join = SkPaint::kBevel_Join; |
| } |
| miterLimit = random->nextRangeF(0.5f, 2.0f); |
| } |
| const GrUserStencilSettings* stencilSettings = GrGetRandomStencil(random, context); |
| return AAFlatteningConvexPathOp::Make(context, std::move(paint), viewMatrix, path, strokeWidth, |
| style, join, miterLimit, stencilSettings); |
| } |
| |
| #endif |
