| /* |
| * 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/ops/FillRRectOp.h" |
| |
| #include "include/gpu/GrRecordingContext.h" |
| #include "src/core/SkRRectPriv.h" |
| #include "src/gpu/BufferWriter.h" |
| #include "src/gpu/GrCaps.h" |
| #include "src/gpu/GrGeometryProcessor.h" |
| #include "src/gpu/GrMemoryPool.h" |
| #include "src/gpu/GrOpFlushState.h" |
| #include "src/gpu/GrOpsRenderPass.h" |
| #include "src/gpu/GrProgramInfo.h" |
| #include "src/gpu/GrRecordingContextPriv.h" |
| #include "src/gpu/GrResourceProvider.h" |
| #include "src/gpu/GrVx.h" |
| #include "src/gpu/geometry/GrShape.h" |
| #include "src/gpu/glsl/GrGLSLFragmentShaderBuilder.h" |
| #include "src/gpu/glsl/GrGLSLVarying.h" |
| #include "src/gpu/glsl/GrGLSLVertexGeoBuilder.h" |
| #include "src/gpu/ops/GrMeshDrawOp.h" |
| #include "src/gpu/ops/GrSimpleMeshDrawOpHelper.h" |
| |
| namespace skgpu::v1::FillRRectOp { |
| |
| namespace { |
| |
| class FillRRectOpImpl final : public GrMeshDrawOp { |
| private: |
| using Helper = GrSimpleMeshDrawOpHelper; |
| |
| public: |
| DEFINE_OP_CLASS_ID |
| |
| static GrOp::Owner Make(GrRecordingContext*, |
| SkArenaAlloc*, |
| GrPaint&&, |
| const SkMatrix& viewMatrix, |
| const SkRRect&, |
| const SkRect& localRect, |
| GrAA); |
| |
| const char* name() const override { return "FillRRectOp"; } |
| |
| FixedFunctionFlags fixedFunctionFlags() const override { return fHelper.fixedFunctionFlags(); } |
| |
| ClipResult clipToShape(skgpu::v1::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; |
| |
| 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; |
| |
| GR_DECL_BITFIELD_CLASS_OPS_FRIENDS(ProcessorFlags); |
| |
| class Processor; |
| |
| FillRRectOpImpl(GrProcessorSet*, |
| const SkPMColor4f& paintColor, |
| SkArenaAlloc*, |
| const SkMatrix& viewMatrix, |
| const SkRRect&, |
| const SkRect& localRect, |
| 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 SkRect& localRect, |
| const SkPMColor4f& color) |
| : fViewMatrix(viewMatrix), fRRect(rrect), fLocalRect(localRect), fColor(color) {} |
| SkMatrix fViewMatrix; |
| SkRRect fRRect; |
| SkRect fLocalRect; |
| 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; |
| }; |
| |
| GR_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 SkRect& localRect, |
| 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, |
| localRect, flags); |
| } |
| |
| FillRRectOpImpl::FillRRectOpImpl(GrProcessorSet* processorSet, |
| const SkPMColor4f& paintColor, |
| SkArenaAlloc* arena, |
| const SkMatrix& viewMatrix, |
| const SkRRect& rrect, |
| const SkRect& localRect, |
| 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, localRect, 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::v1::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 (!SkScalarNearlyZero(clipToView.getSkewX()) || |
| !SkScalarNearlyZero(clipToView.getSkewY())) { |
| // 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 (!shape.rrect().transform(clipToView, &clipRRect)) { |
| // 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; |
| } |
| |
| // Update the local rect. |
| auto rect = skvx::bit_pun<grvx::float4>(fHeadInstance->fRRect.rect()); |
| auto local = skvx::bit_pun<grvx::float4>(fHeadInstance->fLocalRect); |
| auto isect = skvx::bit_pun<grvx::float4>(isectRRect.rect()); |
| auto rectToLocalSize = (local - skvx::shuffle<2,3,0,1>(local)) / |
| (rect - skvx::shuffle<2,3,0,1>(rect)); |
| fHeadInstance->fLocalRect = skvx::bit_pun<SkRect>((isect - rect) * rectToLocalSize + local); |
| |
| // 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; |
| } |
| |
| 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, GrProcessorKeyBuilder* 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->setVertexAttributes(kVertexAttribs, SK_ARRAY_COUNT(kVertexAttribs)); |
| |
| fInstanceAttribs.emplace_back("skew", kFloat4_GrVertexAttribType, kFloat4_GrSLType); |
| fInstanceAttribs.emplace_back("translate", kFloat2_GrVertexAttribType, kFloat2_GrSLType); |
| fInstanceAttribs.emplace_back("radii_x", kFloat4_GrVertexAttribType, kFloat4_GrSLType); |
| fInstanceAttribs.emplace_back("radii_y", kFloat4_GrVertexAttribType, kFloat4_GrSLType); |
| fColorAttrib = &fInstanceAttribs.push_back( |
| MakeColorAttribute("color", (fFlags & ProcessorFlags::kWideColor))); |
| if (fFlags & ProcessorFlags::kHasLocalCoords) { |
| fInstanceAttribs.emplace_back( |
| "local_rect", kFloat4_GrVertexAttribType, kFloat4_GrSLType); |
| } |
| SkASSERT(fInstanceAttribs.count() <= kMaxInstanceAttribs); |
| this->setInstanceAttributes(fInstanceAttribs.begin(), fInstanceAttribs.count()); |
| } |
| |
| inline static constexpr Attribute kVertexAttribs[] = { |
| {"radii_selector", kFloat4_GrVertexAttribType, kFloat4_GrSLType}, |
| {"corner_and_radius_outsets", kFloat4_GrVertexAttribType, kFloat4_GrSLType}, |
| // Coverage only. |
| {"aa_bloat_and_coverage", kFloat4_GrVertexAttribType, kFloat4_GrSLType}}; |
| |
| const ProcessorFlags fFlags; |
| |
| constexpr static int kMaxInstanceAttribs = 6; |
| SkSTArray<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}}; |
| |
| GR_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}; |
| |
| GR_DECLARE_STATIC_UNIQUE_KEY(gIndexBufferKey); |
| |
| void FillRRectOpImpl::onPrepareDraws(GrMeshDrawTarget* target) { |
| if (!fProgramInfo) { |
| this->createProgramInfo(target); |
| } |
| |
| size_t instanceStride = fProgramInfo->geomProc().instanceStride(); |
| |
| if (VertexWriter instanceWrter = target->makeVertexSpace(instanceStride, fInstanceCount, |
| &fInstanceBuffer, &fBaseInstance)) { |
| SkDEBUGCODE(auto end = instanceWrter.makeOffset(instanceStride * fInstanceCount)); |
| for (Instance* i = fHeadInstance; i; i = i->fNext) { |
| #ifndef SKIA_STRUCTURED_BINDINGS_BACKPORT |
| auto [l, t, r, b] = i->fRRect.rect(); |
| #else |
| STRUCTURED_BINDING_4(l, t, r, b, i->fRRect.rect()); |
| #endif |
| |
| // 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. |
| grvx::float4 radiiX, radiiY; |
| skvx::strided_load2(&SkRRectPriv::GetRadiiArray(i->fRRect)->fX, radiiX, radiiY); |
| radiiX *= 2 / (r - l); |
| radiiY *= 2 / (b - t); |
| |
| instanceWrter << m.getScaleX() << m.getSkewX() << m.getSkewY() << m.getScaleY() |
| << m.getTranslateX() << m.getTranslateY() |
| << radiiX << radiiY |
| << GrVertexColor(i->fColor, fProcessorFlags & ProcessorFlags::kWideColor) |
| << VertexWriter::If(fProcessorFlags & ProcessorFlags::kHasLocalCoords, |
| i->fLocalRect); |
| } |
| SkASSERT(instanceWrter == end); |
| } |
| |
| GR_DEFINE_STATIC_UNIQUE_KEY(gIndexBufferKey); |
| |
| fIndexBuffer = target->resourceProvider()->findOrMakeStaticBuffer(GrGpuBufferType::kIndex, |
| sizeof(kIndexData), |
| kIndexData, gIndexBufferKey); |
| |
| GR_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("}"); |
| |
| // Write positions |
| GrShaderVar localCoord("", kFloat2_GrSLType); |
| if (proc.fFlags & ProcessorFlags::kHasLocalCoords) { |
| v->codeAppend("float2 localcoord = (local_rect.xy * (1 - vertexpos) + " |
| "local_rect.zw * (1 + vertexpos)) * .5;"); |
| gpArgs->fLocalCoordVar.set(kFloat2_GrSLType, "localcoord"); |
| } |
| |
| // Transform to device space. |
| v->codeAppend("float2x2 skewmatrix = float2x2(skew.xy, skew.zw);"); |
| v->codeAppend("float2 devcoord = vertexpos * skewmatrix + translate;"); |
| gpArgs->fPositionVar.set(kFloat2_GrSLType, "devcoord"); |
| |
| // Setup interpolants for coverage. |
| GrGLSLVarying arcCoord(useHWDerivatives ? kFloat2_GrSLType : kFloat4_GrSLType); |
| 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(SK_ARRAY_COUNT(kIndexData), 0, fInstanceCount, fBaseInstance, |
| 0); |
| } |
| |
| // Will the given corner look good if we use HW derivatives? |
| bool can_use_hw_derivatives_with_coverage(const Sk2f& devScale, const Sk2f& cornerRadii) { |
| Sk2f devRadii = devScale * cornerRadii; |
| if (devRadii[1] < devRadii[0]) { |
| devRadii = SkNx_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 Sk2f& devScale, const SkVector& cornerRadii) { |
| return can_use_hw_derivatives_with_coverage(devScale, Sk2f::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.shaderDerivativeSupport()) { |
| return false; |
| } |
| |
| Sk2f x = Sk2f(viewMatrix.getScaleX(), viewMatrix.getSkewX()); |
| Sk2f y = Sk2f(viewMatrix.getSkewY(), viewMatrix.getScaleY()); |
| Sk2f devScale = (x*x + y*y).sqrt(); |
| 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: { |
| Sk2f r0 = Sk2f::Load(SkRRectPriv::GetRadiiArray(rrect)); |
| Sk2f r1 = Sk2f::Load(SkRRectPriv::GetRadiiArray(rrect) + 2); |
| Sk2f minRadii = Sk2f::Min(r0, r1); |
| Sk2f maxRadii = Sk2f::Max(r0, r1); |
| return can_use_hw_derivatives_with_coverage(devScale, Sk2f(minRadii[0], maxRadii[1])) && |
| can_use_hw_derivatives_with_coverage(devScale, Sk2f(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); |
| } |
| |
| } // namespace skgpu::v1::FillRRectOp |
| |
| #if GR_TEST_UTILS |
| |
| #include "src/gpu/GrDrawOpTest.h" |
| |
| 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::v1::FillRRectOp::Make(context, |
| &arena, |
| std::move(paint), |
| viewMatrix, |
| rrect, |
| rrect.rect(), |
| aa); |
| } |
| |
| #endif |
