| /* | |
| * Copyright 2018 Google Inc. | |
| * | |
| * 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/FillRRectOp.h" | |
| #include "include/core/SkClipOp.h" | |
| #include "include/core/SkMatrix.h" | |
| #include "include/core/SkRRect.h" | |
| #include "include/core/SkRect.h" | |
| #include "include/core/SkRefCnt.h" | |
| #include "include/core/SkScalar.h" | |
| #include "include/core/SkString.h" | |
| #include "include/gpu/ganesh/GrRecordingContext.h" | |
| #include "include/private/base/SkAlignedStorage.h" | |
| #include "include/private/base/SkAssert.h" | |
| #include "include/private/base/SkDebug.h" | |
| #include "include/private/base/SkMacros.h" | |
| #include "include/private/base/SkOnce.h" | |
| #include "include/private/base/SkPoint_impl.h" | |
| #include "include/private/base/SkTArray.h" | |
| #include "include/private/gpu/ganesh/GrTypesPriv.h" | |
| #include "src/base/SkArenaAlloc.h" | |
| #include "src/base/SkUtils.h" | |
| #include "src/base/SkVx.h" | |
| #include "src/core/SkColorData.h" | |
| #include "src/core/SkRRectPriv.h" | |
| #include "src/core/SkSLTypeShared.h" | |
| #include "src/gpu/BufferWriter.h" | |
| #include "src/gpu/KeyBuilder.h" | |
| #include "src/gpu/ResourceKey.h" | |
| #include "src/gpu/ganesh/GrAppliedClip.h" | |
| #include "src/gpu/ganesh/GrBuffer.h" | |
| #include "src/gpu/ganesh/GrCaps.h" | |
| #include "src/gpu/ganesh/GrGeometryProcessor.h" | |
| #include "src/gpu/ganesh/GrMeshDrawTarget.h" | |
| #include "src/gpu/ganesh/GrOpFlushState.h" | |
| #include "src/gpu/ganesh/GrPaint.h" | |
| #include "src/gpu/ganesh/GrProcessorAnalysis.h" | |
| #include "src/gpu/ganesh/GrProcessorSet.h" | |
| #include "src/gpu/ganesh/GrProgramInfo.h" | |
| #include "src/gpu/ganesh/GrRecordingContextPriv.h" | |
| #include "src/gpu/ganesh/GrResourceProvider.h" | |
| #include "src/gpu/ganesh/GrShaderCaps.h" | |
| #include "src/gpu/ganesh/GrShaderVar.h" | |
| #include "src/gpu/ganesh/geometry/GrShape.h" | |
| #include "src/gpu/ganesh/glsl/GrGLSLFragmentShaderBuilder.h" | |
| #include "src/gpu/ganesh/glsl/GrGLSLVarying.h" | |
| #include "src/gpu/ganesh/glsl/GrGLSLVertexGeoBuilder.h" | |
| #include "src/gpu/ganesh/ops/GrDrawOp.h" | |
| #include "src/gpu/ganesh/ops/GrMeshDrawOp.h" | |
| #include "src/gpu/ganesh/ops/GrSimpleMeshDrawOpHelper.h" | |
| #if defined(GPU_TEST_UTILS) | |
| #include "src/base/SkRandom.h" | |
| #include "src/gpu/ganesh/GrDrawOpTest.h" | |
| #include "src/gpu/ganesh/GrTestUtils.h" | |
| #endif | |
| #include <algorithm> | |
| #include <array> | |
| #include <cstddef> | |
| #include <cstdint> | |
| #include <memory> | |
| #include <utility> | |
| class GrDstProxyView; | |
| class GrGLSLProgramDataManager; | |
| class GrSurfaceProxyView; | |
| enum class GrXferBarrierFlags; | |
| namespace skgpu::ganesh { | |
| class SurfaceDrawContext; | |
| } | |
| using namespace skia_private; | |
| namespace skgpu::ganesh::FillRRectOp { | |
| namespace { | |
| // Note: Just checking m.restStaysRect is not sufficient | |
| bool skews_are_relevant(const SkMatrix& m) { | |
| SkASSERT(!m.hasPerspective()); | |
| if (m[SkMatrix::kMSkewX] == 0.0f && m[SkMatrix::kMSkewY] == 0.0f) { | |
| return false; | |
| } | |
| static constexpr float kTol = SK_ScalarNearlyZero; | |
| float absScaleX = SkScalarAbs(m[SkMatrix::kMScaleX]); | |
| float absSkewX = SkScalarAbs(m[SkMatrix::kMSkewX]); | |
| float absScaleY = SkScalarAbs(m[SkMatrix::kMScaleY]); | |
| float absSkewY = SkScalarAbs(m[SkMatrix::kMSkewY]); | |
| // The maximum absolute column sum norm of the upper left 2x2 | |
| float norm = std::max(absScaleX + absSkewY, absSkewX + absScaleY); | |
| return absSkewX > kTol * norm || absSkewY > kTol * norm; | |
| } | |
| class FillRRectOpImpl final : public GrMeshDrawOp { | |
| private: | |
| using Helper = GrSimpleMeshDrawOpHelper; | |
| public: | |
| DEFINE_OP_CLASS_ID | |
| struct LocalCoords { | |
| enum class Type : bool { kRect, kMatrix }; | |
| LocalCoords(const SkRect& localRect) | |
| : fType(Type::kRect) | |
| , fRect(localRect) {} | |
| LocalCoords(const SkMatrix& localMatrix) | |
| : fType(Type::kMatrix) | |
| , fMatrix(localMatrix) {} | |
| Type fType; | |
| union { | |
| SkRect fRect; | |
| SkMatrix fMatrix; | |
| }; | |
| }; | |
| static GrOp::Owner Make(GrRecordingContext*, | |
| SkArenaAlloc*, | |
| GrPaint&&, | |
| const SkMatrix& viewMatrix, | |
| const SkRRect&, | |
| const LocalCoords&, | |
| GrAA); | |
| const char* name() const override { return "FillRRectOp"; } | |
| FixedFunctionFlags fixedFunctionFlags() const override { return fHelper.fixedFunctionFlags(); } | |
| ClipResult clipToShape(skgpu::ganesh::SurfaceDrawContext*, | |
| SkClipOp, | |
| const SkMatrix& clipMatrix, | |
| const GrShape&, | |
| GrAA) override; | |
| GrProcessorSet::Analysis finalize(const GrCaps&, const GrAppliedClip*, GrClampType) override; | |
| CombineResult onCombineIfPossible(GrOp*, SkArenaAlloc*, const GrCaps&) override; | |
| #if defined(GPU_TEST_UTILS) | |
| SkString onDumpInfo() const override; | |
| #endif | |
| void visitProxies(const GrVisitProxyFunc& func) const override { | |
| if (fProgramInfo) { | |
| fProgramInfo->visitFPProxies(func); | |
| } else { | |
| fHelper.visitProxies(func); | |
| } | |
| } | |
| void onPrepareDraws(GrMeshDrawTarget*) override; | |
| void onExecute(GrOpFlushState*, const SkRect& chainBounds) override; | |
| private: | |
| friend class ::GrSimpleMeshDrawOpHelper; // for access to ctor | |
| friend class ::GrOp; // for access to ctor | |
| enum class ProcessorFlags { | |
| kNone = 0, | |
| kUseHWDerivatives = 1 << 0, | |
| kHasLocalCoords = 1 << 1, | |
| kWideColor = 1 << 2, | |
| kMSAAEnabled = 1 << 3, | |
| kFakeNonAA = 1 << 4, | |
| }; | |
| constexpr static int kNumProcessorFlags = 5; | |
| SK_DECL_BITFIELD_CLASS_OPS_FRIENDS(ProcessorFlags); | |
| class Processor; | |
| FillRRectOpImpl(GrProcessorSet*, | |
| const SkPMColor4f& paintColor, | |
| SkArenaAlloc*, | |
| const SkMatrix& viewMatrix, | |
| const SkRRect&, | |
| const LocalCoords&, | |
| ProcessorFlags); | |
| GrProgramInfo* programInfo() override { return fProgramInfo; } | |
| // Create a GrProgramInfo object in the provided arena | |
| void onCreateProgramInfo(const GrCaps*, | |
| SkArenaAlloc*, | |
| const GrSurfaceProxyView& writeView, | |
| bool usesMSAASurface, | |
| GrAppliedClip&&, | |
| const GrDstProxyView&, | |
| GrXferBarrierFlags renderPassXferBarriers, | |
| GrLoadOp colorLoadOp) override; | |
| Helper fHelper; | |
| ProcessorFlags fProcessorFlags; | |
| struct Instance { | |
| Instance(const SkMatrix& viewMatrix, | |
| const SkRRect& rrect, | |
| const LocalCoords& localCoords, | |
| const SkPMColor4f& color) | |
| : fViewMatrix(viewMatrix), fRRect(rrect), fLocalCoords(localCoords), fColor(color) { | |
| } | |
| SkMatrix fViewMatrix; | |
| SkRRect fRRect; | |
| LocalCoords fLocalCoords; | |
| SkPMColor4f fColor; | |
| Instance* fNext = nullptr; | |
| }; | |
| Instance* fHeadInstance; | |
| Instance** fTailInstance; | |
| int fInstanceCount = 1; | |
| sk_sp<const GrBuffer> fInstanceBuffer; | |
| sk_sp<const GrBuffer> fVertexBuffer; | |
| sk_sp<const GrBuffer> fIndexBuffer; | |
| int fBaseInstance = 0; | |
| // If this op is prePrepared the created programInfo will be stored here for use in | |
| // onExecute. In the prePrepared case it will have been stored in the record-time arena. | |
| GrProgramInfo* fProgramInfo = nullptr; | |
| }; | |
| SK_MAKE_BITFIELD_CLASS_OPS(FillRRectOpImpl::ProcessorFlags) | |
| // Hardware derivatives are not always accurate enough for highly elliptical corners. This method | |
| // checks to make sure the corners will still all look good if we use HW derivatives. | |
| bool can_use_hw_derivatives_with_coverage(const GrShaderCaps&, | |
| const SkMatrix&, | |
| const SkRRect&); | |
| GrOp::Owner FillRRectOpImpl::Make(GrRecordingContext* ctx, | |
| SkArenaAlloc* arena, | |
| GrPaint&& paint, | |
| const SkMatrix& viewMatrix, | |
| const SkRRect& rrect, | |
| const LocalCoords& localCoords, | |
| GrAA aa) { | |
| const GrCaps* caps = ctx->priv().caps(); | |
| if (!caps->drawInstancedSupport()) { | |
| return nullptr; | |
| } | |
| // We transform into a normalized -1..+1 space to draw the round rect. If the boundaries are too | |
| // large, the math can overflow. The caller can fall back on path rendering if this is the case. | |
| if (std::max(rrect.height(), rrect.width()) >= 1e6f) { | |
| return nullptr; | |
| } | |
| ProcessorFlags flags = ProcessorFlags::kNone; | |
| // TODO: Support perspective in a follow-on CL. This shouldn't be difficult, since we already | |
| // use HW derivatives. The only trick will be adjusting the AA outset to account for | |
| // perspective. (i.e., outset = 0.5 * z.) | |
| if (viewMatrix.hasPerspective()) { | |
| return nullptr; | |
| } | |
| if (can_use_hw_derivatives_with_coverage(*caps->shaderCaps(), viewMatrix, rrect)) { | |
| // HW derivatives (more specifically, fwidth()) are consistently faster on all platforms in | |
| // coverage mode. We use them as long as the approximation will be accurate enough. | |
| flags |= ProcessorFlags::kUseHWDerivatives; | |
| } | |
| if (aa == GrAA::kNo) { | |
| flags |= ProcessorFlags::kFakeNonAA; | |
| } | |
| return Helper::FactoryHelper<FillRRectOpImpl>(ctx, std::move(paint), arena, viewMatrix, rrect, | |
| localCoords, flags); | |
| } | |
| FillRRectOpImpl::FillRRectOpImpl(GrProcessorSet* processorSet, | |
| const SkPMColor4f& paintColor, | |
| SkArenaAlloc* arena, | |
| const SkMatrix& viewMatrix, | |
| const SkRRect& rrect, | |
| const LocalCoords& localCoords, | |
| ProcessorFlags processorFlags) | |
| : GrMeshDrawOp(ClassID()) | |
| , fHelper(processorSet, | |
| (processorFlags & ProcessorFlags::kFakeNonAA) | |
| ? GrAAType::kNone | |
| : GrAAType::kCoverage) // Use analytic AA even if the RT is MSAA. | |
| , fProcessorFlags(processorFlags & ~(ProcessorFlags::kHasLocalCoords | | |
| ProcessorFlags::kWideColor | | |
| ProcessorFlags::kMSAAEnabled)) | |
| , fHeadInstance(arena->make<Instance>(viewMatrix, rrect, localCoords, paintColor)) | |
| , fTailInstance(&fHeadInstance->fNext) { | |
| // FillRRectOp::Make fails if there is perspective. | |
| SkASSERT(!viewMatrix.hasPerspective()); | |
| this->setBounds(viewMatrix.mapRect(rrect.getBounds()), | |
| GrOp::HasAABloat(!(processorFlags & ProcessorFlags::kFakeNonAA)), | |
| GrOp::IsHairline::kNo); | |
| } | |
| GrDrawOp::ClipResult FillRRectOpImpl::clipToShape(skgpu::ganesh::SurfaceDrawContext* sdc, | |
| SkClipOp clipOp, | |
| const SkMatrix& clipMatrix, | |
| const GrShape& shape, | |
| GrAA aa) { | |
| SkASSERT(fInstanceCount == 1); // This needs to be called before combining. | |
| SkASSERT(fHeadInstance->fNext == nullptr); | |
| if ((shape.isRect() || shape.isRRect()) && | |
| clipOp == SkClipOp::kIntersect && | |
| (aa == GrAA::kNo) == (fProcessorFlags & ProcessorFlags::kFakeNonAA)) { | |
| // The clip shape is a round rect. Attempt to map it to a round rect in "viewMatrix" space. | |
| SkRRect clipRRect; | |
| if (clipMatrix == fHeadInstance->fViewMatrix) { | |
| if (shape.isRect()) { | |
| clipRRect.setRect(shape.rect()); | |
| } else { | |
| clipRRect = shape.rrect(); | |
| } | |
| } else { | |
| // Find a matrix that maps from "clipMatrix" space to "viewMatrix" space. | |
| SkASSERT(!fHeadInstance->fViewMatrix.hasPerspective()); | |
| if (clipMatrix.hasPerspective()) { | |
| return ClipResult::kFail; | |
| } | |
| SkMatrix clipToView; | |
| if (!fHeadInstance->fViewMatrix.invert(&clipToView)) { | |
| return ClipResult::kClippedOut; | |
| } | |
| clipToView.preConcat(clipMatrix); | |
| SkASSERT(!clipToView.hasPerspective()); | |
| if (skews_are_relevant(clipToView)) { | |
| // A rect in "clipMatrix" space is not a rect in "viewMatrix" space. | |
| return ClipResult::kFail; | |
| } | |
| clipToView.setSkewX(0); | |
| clipToView.setSkewY(0); | |
| SkASSERT(clipToView.rectStaysRect()); | |
| if (shape.isRect()) { | |
| clipRRect.setRect(clipToView.mapRect(shape.rect())); | |
| } else { | |
| if (auto rr = shape.rrect().transform(clipToView)) { | |
| clipRRect = *rr; | |
| } else { | |
| // Transforming the rrect failed. This shouldn't generally happen except in | |
| // cases of fp32 overflow. | |
| return ClipResult::kFail; | |
| } | |
| } | |
| } | |
| // Intersect our round rect with the clip shape. | |
| SkRRect isectRRect; | |
| if (fHeadInstance->fRRect.isRect() && clipRRect.isRect()) { | |
| SkRect isectRect; | |
| if (!isectRect.intersect(fHeadInstance->fRRect.rect(), clipRRect.rect())) { | |
| return ClipResult::kClippedOut; | |
| } | |
| isectRRect.setRect(isectRect); | |
| } else { | |
| isectRRect = SkRRectPriv::ConservativeIntersect(fHeadInstance->fRRect, clipRRect); | |
| if (isectRRect.isEmpty()) { | |
| // The round rects did not intersect at all or the intersection was too complicated | |
| // to compute quickly. | |
| return ClipResult::kFail; | |
| } | |
| } | |
| // Don't apply the clip geometrically if it becomes subpixel, since then the hairline | |
| // rendering may outset beyond the original clip. | |
| SkRect devISectBounds = fHeadInstance->fViewMatrix.mapRect(isectRRect.rect()); | |
| if (devISectBounds.width() < 1.f || devISectBounds.height() < 1.f) { | |
| return ClipResult::kFail; | |
| } | |
| if (fHeadInstance->fLocalCoords.fType == LocalCoords::Type::kRect) { | |
| // Update the local rect. | |
| auto rect = sk_bit_cast<skvx::float4>(fHeadInstance->fRRect.rect()); | |
| auto local = sk_bit_cast<skvx::float4>(fHeadInstance->fLocalCoords.fRect); | |
| auto isect = sk_bit_cast<skvx::float4>(isectRRect.rect()); | |
| auto rectToLocalSize = (local - skvx::shuffle<2,3,0,1>(local)) / | |
| (rect - skvx::shuffle<2,3,0,1>(rect)); | |
| auto localCoordsRect = (isect - rect) * rectToLocalSize + local; | |
| fHeadInstance->fLocalCoords.fRect.setLTRB(localCoordsRect.x(), | |
| localCoordsRect.y(), | |
| localCoordsRect.z(), | |
| localCoordsRect.w()); | |
| } | |
| // Update the round rect. | |
| fHeadInstance->fRRect = isectRRect; | |
| return ClipResult::kClippedGeometrically; | |
| } | |
| return ClipResult::kFail; | |
| } | |
| GrProcessorSet::Analysis FillRRectOpImpl::finalize(const GrCaps& caps, const GrAppliedClip* clip, | |
| GrClampType clampType) { | |
| SkASSERT(fInstanceCount == 1); | |
| SkASSERT(fHeadInstance->fNext == nullptr); | |
| bool isWideColor; | |
| auto analysis = fHelper.finalizeProcessors(caps, clip, clampType, | |
| GrProcessorAnalysisCoverage::kSingleChannel, | |
| &fHeadInstance->fColor, &isWideColor); | |
| if (isWideColor) { | |
| fProcessorFlags |= ProcessorFlags::kWideColor; | |
| } | |
| if (analysis.usesLocalCoords()) { | |
| fProcessorFlags |= ProcessorFlags::kHasLocalCoords; | |
| } | |
| return analysis; | |
| } | |
| GrOp::CombineResult FillRRectOpImpl::onCombineIfPossible(GrOp* op, | |
| SkArenaAlloc*, | |
| const GrCaps& caps) { | |
| auto that = op->cast<FillRRectOpImpl>(); | |
| if (!fHelper.isCompatible(that->fHelper, caps, this->bounds(), that->bounds()) || | |
| fProcessorFlags != that->fProcessorFlags) { | |
| return CombineResult::kCannotCombine; | |
| } | |
| *fTailInstance = that->fHeadInstance; | |
| fTailInstance = that->fTailInstance; | |
| fInstanceCount += that->fInstanceCount; | |
| return CombineResult::kMerged; | |
| } | |
| #if defined(GPU_TEST_UTILS) | |
| SkString FillRRectOpImpl::onDumpInfo() const { | |
| SkString str = SkStringPrintf("# instances: %d\n", fInstanceCount); | |
| str += fHelper.dumpInfo(); | |
| int i = 0; | |
| for (Instance* tmp = fHeadInstance; tmp; tmp = tmp->fNext, ++i) { | |
| str.appendf("%d: Color: [%.2f, %.2f, %.2f, %.2f] ", | |
| i, tmp->fColor.fR, tmp->fColor.fG, tmp->fColor.fB, tmp->fColor.fA); | |
| SkMatrix m = tmp->fViewMatrix; | |
| str.appendf("ViewMatrix: [%.2f, %.2f, %.2f, %.2f, %.2f, %.2f, %.2f, %.2f, %.2f] ", | |
| m[0], m[1], m[2], m[3], m[4], m[5], m[6], m[7], m[8]); | |
| SkRect r = tmp->fRRect.rect(); | |
| str.appendf("Rect: [%f %f %f %f]\n", r.fLeft, r.fTop, r.fRight, r.fBottom); | |
| } | |
| return str; | |
| } | |
| #endif | |
| class FillRRectOpImpl::Processor final : public GrGeometryProcessor { | |
| public: | |
| static GrGeometryProcessor* Make(SkArenaAlloc* arena, GrAAType aaType, ProcessorFlags flags) { | |
| return arena->make([&](void* ptr) { | |
| return new (ptr) Processor(aaType, flags); | |
| }); | |
| } | |
| const char* name() const override { return "FillRRectOp::Processor"; } | |
| void addToKey(const GrShaderCaps& caps, KeyBuilder* b) const override { | |
| b->addBits(kNumProcessorFlags, (uint32_t)fFlags, "flags"); | |
| } | |
| std::unique_ptr<ProgramImpl> makeProgramImpl(const GrShaderCaps&) const override; | |
| private: | |
| class Impl; | |
| Processor(GrAAType aaType, ProcessorFlags flags) | |
| : GrGeometryProcessor(kGrFillRRectOp_Processor_ClassID) | |
| , fFlags(flags) { | |
| this->setVertexAttributesWithImplicitOffsets(kVertexAttribs, std::size(kVertexAttribs)); | |
| fInstanceAttribs.emplace_back("radii_x", kFloat4_GrVertexAttribType, SkSLType::kFloat4); | |
| fInstanceAttribs.emplace_back("radii_y", kFloat4_GrVertexAttribType, SkSLType::kFloat4); | |
| fInstanceAttribs.emplace_back("skew", kFloat4_GrVertexAttribType, SkSLType::kFloat4); | |
| if (fFlags & ProcessorFlags::kHasLocalCoords) { | |
| fInstanceAttribs.emplace_back("translate_and_localrotate", | |
| kFloat4_GrVertexAttribType, | |
| SkSLType::kFloat4); | |
| fInstanceAttribs.emplace_back( | |
| "localrect", kFloat4_GrVertexAttribType, SkSLType::kFloat4); | |
| } else { | |
| fInstanceAttribs.emplace_back("translate_and_localrotate", | |
| kFloat2_GrVertexAttribType, | |
| SkSLType::kFloat2); | |
| } | |
| fColorAttrib = &fInstanceAttribs.push_back( | |
| MakeColorAttribute("color", (fFlags & ProcessorFlags::kWideColor))); | |
| SkASSERT(fInstanceAttribs.size() <= kMaxInstanceAttribs); | |
| this->setInstanceAttributesWithImplicitOffsets(fInstanceAttribs.begin(), | |
| fInstanceAttribs.size()); | |
| } | |
| inline static constexpr Attribute kVertexAttribs[] = { | |
| {"radii_selector", kFloat4_GrVertexAttribType, SkSLType::kFloat4}, | |
| {"corner_and_radius_outsets", kFloat4_GrVertexAttribType, SkSLType::kFloat4}, | |
| // Coverage only. | |
| {"aa_bloat_and_coverage", kFloat4_GrVertexAttribType, SkSLType::kFloat4}}; | |
| const ProcessorFlags fFlags; | |
| constexpr static int kMaxInstanceAttribs = 6; | |
| STArray<kMaxInstanceAttribs, Attribute> fInstanceAttribs; | |
| const Attribute* fColorAttrib; | |
| }; | |
| // Our coverage geometry consists of an inset octagon with solid coverage, surrounded by linear | |
| // coverage ramps on the horizontal and vertical edges, and "arc coverage" pieces on the diagonal | |
| // edges. The Vertex struct tells the shader where to place its vertex within a normalized | |
| // ([l, t, r, b] = [-1, -1, +1, +1]) space, and how to calculate coverage. See onEmitCode. | |
| struct CoverageVertex { | |
| std::array<float, 4> fRadiiSelector; | |
| std::array<float, 2> fCorner; | |
| std::array<float, 2> fRadiusOutset; | |
| std::array<float, 2> fAABloatDirection; | |
| float fCoverage; | |
| float fIsLinearCoverage; | |
| }; | |
| // This is the offset (when multiplied by radii) from the corners of a bounding box to the vertices | |
| // of its inscribed octagon. We draw the outside portion of arcs with quarter-octagons rather than | |
| // rectangles. | |
| static constexpr float kOctoOffset = 1/(1 + SK_ScalarRoot2Over2); | |
| static constexpr CoverageVertex kVertexData[] = { | |
| // Left inset edge. | |
| {{{0,0,0,1}}, {{-1,+1}}, {{0,-1}}, {{+1,0}}, 1, 1}, | |
| {{{1,0,0,0}}, {{-1,-1}}, {{0,+1}}, {{+1,0}}, 1, 1}, | |
| // Top inset edge. | |
| {{{1,0,0,0}}, {{-1,-1}}, {{+1,0}}, {{0,+1}}, 1, 1}, | |
| {{{0,1,0,0}}, {{+1,-1}}, {{-1,0}}, {{0,+1}}, 1, 1}, | |
| // Right inset edge. | |
| {{{0,1,0,0}}, {{+1,-1}}, {{0,+1}}, {{-1,0}}, 1, 1}, | |
| {{{0,0,1,0}}, {{+1,+1}}, {{0,-1}}, {{-1,0}}, 1, 1}, | |
| // Bottom inset edge. | |
| {{{0,0,1,0}}, {{+1,+1}}, {{-1,0}}, {{0,-1}}, 1, 1}, | |
| {{{0,0,0,1}}, {{-1,+1}}, {{+1,0}}, {{0,-1}}, 1, 1}, | |
| // Left outset edge. | |
| {{{0,0,0,1}}, {{-1,+1}}, {{0,-1}}, {{-1,0}}, 0, 1}, | |
| {{{1,0,0,0}}, {{-1,-1}}, {{0,+1}}, {{-1,0}}, 0, 1}, | |
| // Top outset edge. | |
| {{{1,0,0,0}}, {{-1,-1}}, {{+1,0}}, {{0,-1}}, 0, 1}, | |
| {{{0,1,0,0}}, {{+1,-1}}, {{-1,0}}, {{0,-1}}, 0, 1}, | |
| // Right outset edge. | |
| {{{0,1,0,0}}, {{+1,-1}}, {{0,+1}}, {{+1,0}}, 0, 1}, | |
| {{{0,0,1,0}}, {{+1,+1}}, {{0,-1}}, {{+1,0}}, 0, 1}, | |
| // Bottom outset edge. | |
| {{{0,0,1,0}}, {{+1,+1}}, {{-1,0}}, {{0,+1}}, 0, 1}, | |
| {{{0,0,0,1}}, {{-1,+1}}, {{+1,0}}, {{0,+1}}, 0, 1}, | |
| // Top-left corner. | |
| {{{1,0,0,0}}, {{-1,-1}}, {{ 0,+1}}, {{-1, 0}}, 0, 0}, | |
| {{{1,0,0,0}}, {{-1,-1}}, {{ 0,+1}}, {{+1, 0}}, 1, 0}, | |
| {{{1,0,0,0}}, {{-1,-1}}, {{+1, 0}}, {{ 0,+1}}, 1, 0}, | |
| {{{1,0,0,0}}, {{-1,-1}}, {{+1, 0}}, {{ 0,-1}}, 0, 0}, | |
| {{{1,0,0,0}}, {{-1,-1}}, {{+kOctoOffset,0}}, {{-1,-1}}, 0, 0}, | |
| {{{1,0,0,0}}, {{-1,-1}}, {{0,+kOctoOffset}}, {{-1,-1}}, 0, 0}, | |
| // Top-right corner. | |
| {{{0,1,0,0}}, {{+1,-1}}, {{-1, 0}}, {{ 0,-1}}, 0, 0}, | |
| {{{0,1,0,0}}, {{+1,-1}}, {{-1, 0}}, {{ 0,+1}}, 1, 0}, | |
| {{{0,1,0,0}}, {{+1,-1}}, {{ 0,+1}}, {{-1, 0}}, 1, 0}, | |
| {{{0,1,0,0}}, {{+1,-1}}, {{ 0,+1}}, {{+1, 0}}, 0, 0}, | |
| {{{0,1,0,0}}, {{+1,-1}}, {{0,+kOctoOffset}}, {{+1,-1}}, 0, 0}, | |
| {{{0,1,0,0}}, {{+1,-1}}, {{-kOctoOffset,0}}, {{+1,-1}}, 0, 0}, | |
| // Bottom-right corner. | |
| {{{0,0,1,0}}, {{+1,+1}}, {{ 0,-1}}, {{+1, 0}}, 0, 0}, | |
| {{{0,0,1,0}}, {{+1,+1}}, {{ 0,-1}}, {{-1, 0}}, 1, 0}, | |
| {{{0,0,1,0}}, {{+1,+1}}, {{-1, 0}}, {{ 0,-1}}, 1, 0}, | |
| {{{0,0,1,0}}, {{+1,+1}}, {{-1, 0}}, {{ 0,+1}}, 0, 0}, | |
| {{{0,0,1,0}}, {{+1,+1}}, {{-kOctoOffset,0}}, {{+1,+1}}, 0, 0}, | |
| {{{0,0,1,0}}, {{+1,+1}}, {{0,-kOctoOffset}}, {{+1,+1}}, 0, 0}, | |
| // Bottom-left corner. | |
| {{{0,0,0,1}}, {{-1,+1}}, {{+1, 0}}, {{ 0,+1}}, 0, 0}, | |
| {{{0,0,0,1}}, {{-1,+1}}, {{+1, 0}}, {{ 0,-1}}, 1, 0}, | |
| {{{0,0,0,1}}, {{-1,+1}}, {{ 0,-1}}, {{+1, 0}}, 1, 0}, | |
| {{{0,0,0,1}}, {{-1,+1}}, {{ 0,-1}}, {{-1, 0}}, 0, 0}, | |
| {{{0,0,0,1}}, {{-1,+1}}, {{0,-kOctoOffset}}, {{-1,+1}}, 0, 0}, | |
| {{{0,0,0,1}}, {{-1,+1}}, {{+kOctoOffset,0}}, {{-1,+1}}, 0, 0}}; | |
| SKGPU_DECLARE_STATIC_UNIQUE_KEY(gVertexBufferKey); | |
| static constexpr uint16_t kIndexData[] = { | |
| // Inset octagon (solid coverage). | |
| 0, 1, 7, | |
| 1, 2, 7, | |
| 7, 2, 6, | |
| 2, 3, 6, | |
| 6, 3, 5, | |
| 3, 4, 5, | |
| // AA borders (linear coverage). | |
| 0, 1, 8, 1, 9, 8, | |
| 2, 3, 10, 3, 11, 10, | |
| 4, 5, 12, 5, 13, 12, | |
| 6, 7, 14, 7, 15, 14, | |
| // Top-left arc. | |
| 16, 17, 21, | |
| 17, 21, 18, | |
| 21, 18, 20, | |
| 18, 20, 19, | |
| // Top-right arc. | |
| 22, 23, 27, | |
| 23, 27, 24, | |
| 27, 24, 26, | |
| 24, 26, 25, | |
| // Bottom-right arc. | |
| 28, 29, 33, | |
| 29, 33, 30, | |
| 33, 30, 32, | |
| 30, 32, 31, | |
| // Bottom-left arc. | |
| 34, 35, 39, | |
| 35, 39, 36, | |
| 39, 36, 38, | |
| 36, 38, 37}; | |
| SKGPU_DECLARE_STATIC_UNIQUE_KEY(gIndexBufferKey); | |
| void FillRRectOpImpl::onPrepareDraws(GrMeshDrawTarget* target) { | |
| if (!fProgramInfo) { | |
| this->createProgramInfo(target); | |
| } | |
| size_t instanceStride = fProgramInfo->geomProc().instanceStride(); | |
| if (VertexWriter instanceWriter = target->makeVertexWriter(instanceStride, fInstanceCount, | |
| &fInstanceBuffer, &fBaseInstance)) { | |
| SkDEBUGCODE(auto end = instanceWriter.mark(instanceStride * fInstanceCount)); | |
| for (Instance* i = fHeadInstance; i; i = i->fNext) { | |
| auto [l, t, r, b] = i->fRRect.rect(); | |
| // Produce a matrix that draws the round rect from normalized [-1, -1, +1, +1] space. | |
| SkMatrix m; | |
| // Unmap the normalized rect [-1, -1, +1, +1] back to [l, t, r, b]. | |
| m.setScaleTranslate((r - l)/2, (b - t)/2, (l + r)/2, (t + b)/2); | |
| // Map to device space. | |
| m.postConcat(i->fViewMatrix); | |
| // Convert the radii to [-1, -1, +1, +1] space and write their attribs. | |
| skvx::float4 radiiX, radiiY; | |
| skvx::strided_load2(&SkRRectPriv::GetRadiiArray(i->fRRect)->fX, radiiX, radiiY); | |
| radiiX *= 2 / (r - l); | |
| radiiY *= 2 / (b - t); | |
| instanceWriter << radiiX << radiiY | |
| << m.getScaleX() << m.getSkewX() << m.getSkewY() << m.getScaleY() | |
| << m.getTranslateX() << m.getTranslateY(); | |
| if (fProcessorFlags & ProcessorFlags::kHasLocalCoords) { | |
| if (i->fLocalCoords.fType == LocalCoords::Type::kRect) { | |
| instanceWriter << 0.f << 0.f // localrotate | |
| << i->fLocalCoords.fRect; // localrect | |
| } else { | |
| SkASSERT(i->fLocalCoords.fType == LocalCoords::Type::kMatrix); | |
| const SkRect& bounds = i->fRRect.rect(); | |
| const SkMatrix& localMatrix = i->fLocalCoords.fMatrix; | |
| SkVector u = localMatrix.mapVector(bounds.right() - bounds.left(), 0); | |
| SkVector v = localMatrix.mapVector(0, bounds.bottom() - bounds.top()); | |
| SkPoint l0 = localMatrix.mapPoint({bounds.left(), bounds.top()}); | |
| instanceWriter << v.x() << u.y() // localrotate | |
| << l0 << (l0.x() + u.x()) << (l0.y() + v.y()); // localrect | |
| } | |
| } | |
| instanceWriter << VertexColor(i->fColor, fProcessorFlags & ProcessorFlags::kWideColor); | |
| } | |
| SkASSERT(instanceWriter.mark() == end); | |
| } | |
| SKGPU_DEFINE_STATIC_UNIQUE_KEY(gIndexBufferKey); | |
| fIndexBuffer = target->resourceProvider()->findOrMakeStaticBuffer(GrGpuBufferType::kIndex, | |
| sizeof(kIndexData), | |
| kIndexData, gIndexBufferKey); | |
| SKGPU_DEFINE_STATIC_UNIQUE_KEY(gVertexBufferKey); | |
| fVertexBuffer = target->resourceProvider()->findOrMakeStaticBuffer(GrGpuBufferType::kVertex, | |
| sizeof(kVertexData), | |
| kVertexData, | |
| gVertexBufferKey); | |
| } | |
| class FillRRectOpImpl::Processor::Impl : public ProgramImpl { | |
| public: | |
| void setData(const GrGLSLProgramDataManager&, | |
| const GrShaderCaps&, | |
| const GrGeometryProcessor&) override {} | |
| private: | |
| void onEmitCode(EmitArgs& args, GrGPArgs* gpArgs) override { | |
| GrGLSLVertexBuilder* v = args.fVertBuilder; | |
| GrGLSLFPFragmentBuilder* f = args.fFragBuilder; | |
| const auto& proc = args.fGeomProc.cast<Processor>(); | |
| bool useHWDerivatives = (proc.fFlags & ProcessorFlags::kUseHWDerivatives); | |
| SkASSERT(proc.vertexStride() == sizeof(CoverageVertex)); | |
| GrGLSLVaryingHandler* varyings = args.fVaryingHandler; | |
| varyings->emitAttributes(proc); | |
| f->codeAppendf("half4 %s;", args.fOutputColor); | |
| varyings->addPassThroughAttribute(proc.fColorAttrib->asShaderVar(), | |
| args.fOutputColor, | |
| GrGLSLVaryingHandler::Interpolation::kCanBeFlat); | |
| // Emit the vertex shader. | |
| // When MSAA is enabled, we need to make sure every sample gets lit up on pixels that have | |
| // fractional coverage. We do this by making the ramp wider. | |
| v->codeAppendf("float aa_bloat_multiplier = %i;", | |
| (proc.fFlags & ProcessorFlags::kMSAAEnabled) | |
| ? 2 // Outset an entire pixel (2 radii). | |
| : (!(proc.fFlags & ProcessorFlags::kFakeNonAA)) | |
| ? 1 // Outset one half pixel (1 radius). | |
| : 0); // No AA bloat. | |
| // Unpack vertex attribs. | |
| v->codeAppend("float2 corner = corner_and_radius_outsets.xy;"); | |
| v->codeAppend("float2 radius_outset = corner_and_radius_outsets.zw;"); | |
| v->codeAppend("float2 aa_bloat_direction = aa_bloat_and_coverage.xy;"); | |
| v->codeAppend("float is_linear_coverage = aa_bloat_and_coverage.w;"); | |
| // Find the amount to bloat each edge for AA (in source space). | |
| v->codeAppend("float2 pixellength = inversesqrt(" | |
| "float2(dot(skew.xz, skew.xz), dot(skew.yw, skew.yw)));"); | |
| v->codeAppend("float4 normalized_axis_dirs = skew * pixellength.xyxy;"); | |
| v->codeAppend("float2 axiswidths = (abs(normalized_axis_dirs.xy) + " | |
| "abs(normalized_axis_dirs.zw));"); | |
| v->codeAppend("float2 aa_bloatradius = axiswidths * pixellength * .5;"); | |
| // Identify our radii. | |
| v->codeAppend("float4 radii_and_neighbors = radii_selector" | |
| "* float4x4(radii_x, radii_y, radii_x.yxwz, radii_y.wzyx);"); | |
| v->codeAppend("float2 radii = radii_and_neighbors.xy;"); | |
| v->codeAppend("float2 neighbor_radii = radii_and_neighbors.zw;"); | |
| v->codeAppend("float coverage_multiplier = 1;"); | |
| v->codeAppend("if (any(greaterThan(aa_bloatradius, float2(1)))) {"); | |
| // The rrect is more narrow than a half-pixel AA coverage ramp. We can't | |
| // draw as-is or else opposite AA borders will overlap. Instead, fudge the | |
| // size up to the width of a coverage ramp, and then reduce total coverage | |
| // to make the rect appear more thin. | |
| v->codeAppend( "corner = max(abs(corner), aa_bloatradius) * sign(corner);"); | |
| v->codeAppend( "coverage_multiplier = 1 / (max(aa_bloatradius.x, 1) * " | |
| "max(aa_bloatradius.y, 1));"); | |
| // Set radii to zero to ensure we take the "linear coverage" codepath. | |
| // (The "coverage" variable only has effect in the linear codepath.) | |
| v->codeAppend( "radii = float2(0);"); | |
| v->codeAppend("}"); | |
| // Unpack coverage. | |
| v->codeAppend("float coverage = aa_bloat_and_coverage.z;"); | |
| if (proc.fFlags & ProcessorFlags::kMSAAEnabled) { | |
| // MSAA has a wider ramp that goes from -.5 to 1.5 instead of 0 to 1. | |
| v->codeAppendf("coverage = (coverage - .5) * aa_bloat_multiplier + .5;"); | |
| } | |
| v->codeAppend("if (any(lessThan(radii, aa_bloatradius * 1.5))) {"); | |
| // The radii are very small. Demote this arc to a sharp 90 degree corner. | |
| v->codeAppend( "radii = float2(0);"); | |
| // Convert to a standard picture frame for an AA rect instead of the round | |
| // rect geometry. | |
| v->codeAppend( "aa_bloat_direction = sign(corner);"); | |
| v->codeAppend( "if (coverage > .5) {"); // Are we an inset edge? | |
| v->codeAppend( "aa_bloat_direction = -aa_bloat_direction;"); | |
| v->codeAppend( "}"); | |
| v->codeAppend( "is_linear_coverage = 1;"); | |
| v->codeAppend("} else {"); | |
| // Don't let radii get smaller than a coverage ramp plus an extra half | |
| // pixel for MSAA. Always use the same amount so we don't pop when | |
| // switching between MSAA and coverage. | |
| v->codeAppend( "radii = clamp(radii, pixellength * 1.5, 2 - pixellength * 1.5);"); | |
| v->codeAppend( "neighbor_radii = clamp(neighbor_radii, pixellength * 1.5, " | |
| "2 - pixellength * 1.5);"); | |
| // Don't let neighboring radii get closer together than 1/16 pixel. | |
| v->codeAppend( "float2 spacing = 2 - radii - neighbor_radii;"); | |
| v->codeAppend( "float2 extra_pad = max(pixellength * .0625 - spacing, float2(0));"); | |
| v->codeAppend( "radii -= extra_pad * .5;"); | |
| v->codeAppend("}"); | |
| // Find our vertex position, adjusted for radii and bloated for AA. Our rect is drawn in | |
| // normalized [-1,-1,+1,+1] space. | |
| v->codeAppend("float2 aa_outset = " | |
| "aa_bloat_direction * aa_bloatradius * aa_bloat_multiplier;"); | |
| v->codeAppend("float2 vertexpos = corner + radius_outset * radii + aa_outset;"); | |
| v->codeAppend("if (coverage > .5) {"); // Are we an inset edge? | |
| // Don't allow the aa insets to overlap. i.e., Don't let them inset past | |
| // the center (x=y=0). Since we don't allow the rect to become thinner | |
| // than 1px, this should only happen when using MSAA, where we inset by an | |
| // entire pixel instead of half. | |
| v->codeAppend( "if (aa_bloat_direction.x != 0 && vertexpos.x * corner.x < 0) {"); | |
| v->codeAppend( "float backset = abs(vertexpos.x);"); | |
| v->codeAppend( "vertexpos.x = 0;"); | |
| v->codeAppend( "vertexpos.y += " | |
| "backset * sign(corner.y) * pixellength.y/pixellength.x;"); | |
| v->codeAppend( "coverage = (coverage - .5) * abs(corner.x) / " | |
| "(abs(corner.x) + backset) + .5;"); | |
| v->codeAppend( "}"); | |
| v->codeAppend( "if (aa_bloat_direction.y != 0 && vertexpos.y * corner.y < 0) {"); | |
| v->codeAppend( "float backset = abs(vertexpos.y);"); | |
| v->codeAppend( "vertexpos.y = 0;"); | |
| v->codeAppend( "vertexpos.x += " | |
| "backset * sign(corner.x) * pixellength.x/pixellength.y;"); | |
| v->codeAppend( "coverage = (coverage - .5) * abs(corner.y) / " | |
| "(abs(corner.y) + backset) + .5;"); | |
| v->codeAppend( "}"); | |
| v->codeAppend("}"); | |
| // Transform to device space. | |
| v->codeAppend("float2x2 skewmatrix = float2x2(skew.xy, skew.zw);"); | |
| v->codeAppend("float2 devcoord = vertexpos * skewmatrix + translate_and_localrotate.xy;"); | |
| gpArgs->fPositionVar.set(SkSLType::kFloat2, "devcoord"); | |
| // Output local coordinates. | |
| if (proc.fFlags & ProcessorFlags::kHasLocalCoords) { | |
| // Do math in a way that preserves exact local coord boundaries when there is no local | |
| // rotate and vertexpos is on an exact shape boundary. | |
| v->codeAppend("float2 T = vertexpos * .5 + .5;"); | |
| v->codeAppend("float2 localcoord = localrect.xy * (1 - T) + " | |
| "localrect.zw * T + " | |
| "translate_and_localrotate.zw * T.yx;"); | |
| gpArgs->fLocalCoordVar.set(SkSLType::kFloat2, "localcoord"); | |
| } | |
| // Setup interpolants for coverage. | |
| GrGLSLVarying arcCoord(useHWDerivatives ? SkSLType::kFloat2 : SkSLType::kFloat4); | |
| varyings->addVarying("arccoord", &arcCoord); | |
| v->codeAppend("if (0 != is_linear_coverage) {"); | |
| // We are a non-corner piece: Set x=0 to indicate built-in coverage, and | |
| // interpolate linear coverage across y. | |
| v->codeAppendf( "%s.xy = float2(0, coverage * coverage_multiplier);", | |
| arcCoord.vsOut()); | |
| v->codeAppend("} else {"); | |
| // Find the normalized arc coordinates for our corner ellipse. | |
| // (i.e., the coordinate system where x^2 + y^2 == 1). | |
| v->codeAppend( "float2 arccoord = 1 - abs(radius_outset) + aa_outset/radii * corner;"); | |
| // We are a corner piece: Interpolate the arc coordinates for coverage. | |
| // Emit x+1 to ensure no pixel in the arc has a x value of 0 (since x=0 | |
| // instructs the fragment shader to use linear coverage). | |
| v->codeAppendf( "%s.xy = float2(arccoord.x+1, arccoord.y);", arcCoord.vsOut()); | |
| if (!useHWDerivatives) { | |
| // The gradient is order-1: Interpolate it across arccoord.zw. | |
| v->codeAppendf("float2x2 derivatives = inverse(skewmatrix);"); | |
| v->codeAppendf("%s.zw = derivatives * (arccoord/radii * 2);", arcCoord.vsOut()); | |
| } | |
| v->codeAppend("}"); | |
| // Emit the fragment shader. | |
| f->codeAppendf("float x_plus_1=%s.x, y=%s.y;", arcCoord.fsIn(), arcCoord.fsIn()); | |
| f->codeAppendf("half coverage;"); | |
| f->codeAppendf("if (0 == x_plus_1) {"); | |
| f->codeAppendf( "coverage = half(y);"); // We are a non-arc pixel (linear coverage). | |
| f->codeAppendf("} else {"); | |
| f->codeAppendf( "float fn = x_plus_1 * (x_plus_1 - 2);"); // fn = (x+1)*(x-1) = x^2-1 | |
| f->codeAppendf( "fn = fma(y,y, fn);"); // fn = x^2 + y^2 - 1 | |
| if (useHWDerivatives) { | |
| f->codeAppendf("float fnwidth = fwidth(fn);"); | |
| } else { | |
| // The gradient is interpolated across arccoord.zw. | |
| f->codeAppendf("float gx=%s.z, gy=%s.w;", arcCoord.fsIn(), arcCoord.fsIn()); | |
| f->codeAppendf("float fnwidth = abs(gx) + abs(gy);"); | |
| } | |
| f->codeAppendf( "coverage = .5 - half(fn/fnwidth);"); | |
| if (proc.fFlags & ProcessorFlags::kMSAAEnabled) { | |
| // MSAA uses ramps larger than 1px, so we need to clamp in both branches. | |
| f->codeAppendf("}"); | |
| } | |
| f->codeAppendf("coverage = clamp(coverage, 0, 1);"); | |
| if (!(proc.fFlags & ProcessorFlags::kMSAAEnabled)) { | |
| // When not using MSAA, we only need to clamp in the "arc" branch. | |
| f->codeAppendf("}"); | |
| } | |
| if (proc.fFlags & ProcessorFlags::kFakeNonAA) { | |
| f->codeAppendf("coverage = (coverage >= .5) ? 1 : 0;"); | |
| } | |
| f->codeAppendf("half4 %s = half4(coverage);", args.fOutputCoverage); | |
| } | |
| }; | |
| std::unique_ptr<GrGeometryProcessor::ProgramImpl> FillRRectOpImpl::Processor::makeProgramImpl( | |
| const GrShaderCaps&) const { | |
| return std::make_unique<Impl>(); | |
| } | |
| void FillRRectOpImpl::onCreateProgramInfo(const GrCaps* caps, | |
| SkArenaAlloc* arena, | |
| const GrSurfaceProxyView& writeView, | |
| bool usesMSAASurface, | |
| GrAppliedClip&& appliedClip, | |
| const GrDstProxyView& dstProxyView, | |
| GrXferBarrierFlags renderPassXferBarriers, | |
| GrLoadOp colorLoadOp) { | |
| if (usesMSAASurface) { | |
| fProcessorFlags |= ProcessorFlags::kMSAAEnabled; | |
| } | |
| GrGeometryProcessor* gp = Processor::Make(arena, fHelper.aaType(), fProcessorFlags); | |
| fProgramInfo = fHelper.createProgramInfo(caps, arena, writeView, usesMSAASurface, | |
| std::move(appliedClip), dstProxyView, gp, | |
| GrPrimitiveType::kTriangles, renderPassXferBarriers, | |
| colorLoadOp); | |
| } | |
| void FillRRectOpImpl::onExecute(GrOpFlushState* flushState, const SkRect& chainBounds) { | |
| if (!fInstanceBuffer || !fIndexBuffer || !fVertexBuffer) { | |
| return; // Setup failed. | |
| } | |
| flushState->bindPipelineAndScissorClip(*fProgramInfo, this->bounds()); | |
| flushState->bindTextures(fProgramInfo->geomProc(), nullptr, fProgramInfo->pipeline()); | |
| flushState->bindBuffers(std::move(fIndexBuffer), std::move(fInstanceBuffer), | |
| std::move(fVertexBuffer)); | |
| flushState->drawIndexedInstanced(std::size(kIndexData), 0, fInstanceCount, fBaseInstance, 0); | |
| } | |
| // Will the given corner look good if we use HW derivatives? | |
| bool can_use_hw_derivatives_with_coverage(const skvx::float2& devScale, | |
| const skvx::float2& cornerRadii) { | |
| skvx::float2 devRadii = devScale * cornerRadii; | |
| if (devRadii[1] < devRadii[0]) { | |
| devRadii = skvx::shuffle<1,0>(devRadii); | |
| } | |
| float minDevRadius = std::max(devRadii[0], 1.f); // Shader clamps radius at a minimum of 1. | |
| // Is the gradient smooth enough for this corner look ok if we use hardware derivatives? | |
| // This threshold was arrived at subjevtively on an NVIDIA chip. | |
| return minDevRadius * minDevRadius * 5 > devRadii[1]; | |
| } | |
| bool can_use_hw_derivatives_with_coverage(const skvx::float2& devScale, | |
| const SkVector& cornerRadii) { | |
| return can_use_hw_derivatives_with_coverage(devScale, skvx::float2::Load(&cornerRadii)); | |
| } | |
| // Will the given round rect look good if we use HW derivatives? | |
| bool can_use_hw_derivatives_with_coverage(const GrShaderCaps& shaderCaps, | |
| const SkMatrix& viewMatrix, | |
| const SkRRect& rrect) { | |
| if (!shaderCaps.fShaderDerivativeSupport) { | |
| return false; | |
| } | |
| auto x = skvx::float2(viewMatrix.getScaleX(), viewMatrix.getSkewX()); | |
| auto y = skvx::float2(viewMatrix.getSkewY(), viewMatrix.getScaleY()); | |
| skvx::float2 devScale = sqrt(x*x + y*y); | |
| switch (rrect.getType()) { | |
| case SkRRect::kEmpty_Type: | |
| case SkRRect::kRect_Type: | |
| return true; | |
| case SkRRect::kOval_Type: | |
| case SkRRect::kSimple_Type: | |
| return can_use_hw_derivatives_with_coverage(devScale, rrect.getSimpleRadii()); | |
| case SkRRect::kNinePatch_Type: { | |
| skvx::float2 r0 = skvx::float2::Load(SkRRectPriv::GetRadiiArray(rrect)); | |
| skvx::float2 r1 = skvx::float2::Load(SkRRectPriv::GetRadiiArray(rrect) + 2); | |
| skvx::float2 minRadii = min(r0, r1); | |
| skvx::float2 maxRadii = max(r0, r1); | |
| return can_use_hw_derivatives_with_coverage(devScale, | |
| skvx::float2(minRadii[0], maxRadii[1])) && | |
| can_use_hw_derivatives_with_coverage(devScale, | |
| skvx::float2(maxRadii[0], minRadii[1])); | |
| } | |
| case SkRRect::kComplex_Type: { | |
| for (int i = 0; i < 4; ++i) { | |
| auto corner = static_cast<SkRRect::Corner>(i); | |
| if (!can_use_hw_derivatives_with_coverage(devScale, rrect.radii(corner))) { | |
| return false; | |
| } | |
| } | |
| return true; | |
| } | |
| } | |
| SK_ABORT("Invalid round rect type."); | |
| } | |
| } // anonymous namespace | |
| GrOp::Owner Make(GrRecordingContext* ctx, | |
| SkArenaAlloc* arena, | |
| GrPaint&& paint, | |
| const SkMatrix& viewMatrix, | |
| const SkRRect& rrect, | |
| const SkRect& localRect, | |
| GrAA aa) { | |
| return FillRRectOpImpl::Make(ctx, arena, std::move(paint), viewMatrix, rrect, localRect, aa); | |
| } | |
| GrOp::Owner Make(GrRecordingContext* ctx, | |
| SkArenaAlloc* arena, | |
| GrPaint&& paint, | |
| const SkMatrix& viewMatrix, | |
| const SkRRect& rrect, | |
| const SkMatrix& localMatrix, | |
| GrAA aa) { | |
| return FillRRectOpImpl::Make(ctx, arena, std::move(paint), viewMatrix, rrect, localMatrix, aa); | |
| } | |
| } // namespace skgpu::ganesh::FillRRectOp | |
| #if defined(GPU_TEST_UTILS) | |
| GR_DRAW_OP_TEST_DEFINE(FillRRectOp) { | |
| SkArenaAlloc arena(64 * sizeof(float)); | |
| SkMatrix viewMatrix = GrTest::TestMatrix(random); | |
| GrAA aa = GrAA(random->nextBool()); | |
| SkRect rect = GrTest::TestRect(random); | |
| float w = rect.width(); | |
| float h = rect.height(); | |
| SkRRect rrect; | |
| // TODO: test out other rrect configurations | |
| rrect.setNinePatch(rect, w / 3.0f, h / 4.0f, w / 5.0f, h / 6.0); | |
| return skgpu::ganesh::FillRRectOp::Make( | |
| context, &arena, std::move(paint), viewMatrix, rrect, rrect.rect(), aa); | |
| } | |
| #endif |