| /* |
| * 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/StrokeRectOp.h" |
| |
| #include "include/core/SkStrokeRec.h" |
| #include "include/private/GrResourceKey.h" |
| #include "include/utils/SkRandom.h" |
| #include "src/core/SkMatrixPriv.h" |
| #include "src/gpu/BufferWriter.h" |
| #include "src/gpu/GrCaps.h" |
| #include "src/gpu/GrColor.h" |
| #include "src/gpu/GrDefaultGeoProcFactory.h" |
| #include "src/gpu/GrDrawOpTest.h" |
| #include "src/gpu/GrOpFlushState.h" |
| #include "src/gpu/GrProgramInfo.h" |
| #include "src/gpu/GrResourceProvider.h" |
| #include "src/gpu/geometry/GrQuad.h" |
| #include "src/gpu/ops/FillRectOp.h" |
| #include "src/gpu/ops/GrMeshDrawOp.h" |
| #include "src/gpu/ops/GrSimpleMeshDrawOpHelper.h" |
| |
| namespace skgpu::v1::StrokeRectOp { |
| |
| namespace { |
| |
| // We support all hairlines, bevels, and miters, but not round joins. Also, check whether the miter |
| // limit makes a miter join effectively beveled. If the miter is effectively beveled, it is only |
| // supported when using an AA stroke. |
| inline bool allowed_stroke(const SkStrokeRec& stroke, GrAA aa, bool* isMiter) { |
| SkASSERT(stroke.getStyle() == SkStrokeRec::kStroke_Style || |
| stroke.getStyle() == SkStrokeRec::kHairline_Style); |
| // For hairlines, make bevel and round joins appear the same as mitered ones. |
| if (!stroke.getWidth()) { |
| *isMiter = true; |
| return true; |
| } |
| if (stroke.getJoin() == SkPaint::kBevel_Join) { |
| *isMiter = false; |
| return aa == GrAA::kYes; // bevel only supported with AA |
| } |
| if (stroke.getJoin() == SkPaint::kMiter_Join) { |
| *isMiter = stroke.getMiter() >= SK_ScalarSqrt2; |
| // Supported under non-AA only if it remains mitered |
| return aa == GrAA::kYes || *isMiter; |
| } |
| return false; |
| } |
| |
| |
| /////////////////////////////////////////////////////////////////////////////////////////////////// |
| // Non-AA Stroking |
| /////////////////////////////////////////////////////////////////////////////////////////////////// |
| |
| /* create a triangle strip that strokes the specified rect. There are 8 |
| unique vertices, but we repeat the last 2 to close up. Alternatively we |
| could use an indices array, and then only send 8 verts, but not sure that |
| would be faster. |
| */ |
| void init_nonaa_stroke_rect_strip(SkPoint verts[10], const SkRect& rect, SkScalar width) { |
| const SkScalar rad = SkScalarHalf(width); |
| |
| verts[0].set(rect.fLeft + rad, rect.fTop + rad); |
| verts[1].set(rect.fLeft - rad, rect.fTop - rad); |
| verts[2].set(rect.fRight - rad, rect.fTop + rad); |
| verts[3].set(rect.fRight + rad, rect.fTop - rad); |
| verts[4].set(rect.fRight - rad, rect.fBottom - rad); |
| verts[5].set(rect.fRight + rad, rect.fBottom + rad); |
| verts[6].set(rect.fLeft + rad, rect.fBottom - rad); |
| verts[7].set(rect.fLeft - rad, rect.fBottom + rad); |
| verts[8] = verts[0]; |
| verts[9] = verts[1]; |
| |
| // TODO: we should be catching this higher up the call stack and just draw a single |
| // non-AA rect |
| if (2*rad >= rect.width()) { |
| verts[0].fX = verts[2].fX = verts[4].fX = verts[6].fX = verts[8].fX = rect.centerX(); |
| } |
| if (2*rad >= rect.height()) { |
| verts[0].fY = verts[2].fY = verts[4].fY = verts[6].fY = verts[8].fY = rect.centerY(); |
| } |
| } |
| |
| class NonAAStrokeRectOp final : public GrMeshDrawOp { |
| private: |
| using Helper = GrSimpleMeshDrawOpHelper; |
| |
| public: |
| DEFINE_OP_CLASS_ID |
| |
| const char* name() const override { return "NonAAStrokeRectOp"; } |
| |
| void visitProxies(const GrVisitProxyFunc& func) const override { |
| if (fProgramInfo) { |
| fProgramInfo->visitFPProxies(func); |
| } else { |
| fHelper.visitProxies(func); |
| } |
| } |
| |
| static GrOp::Owner Make(GrRecordingContext* context, |
| GrPaint&& paint, |
| const SkMatrix& viewMatrix, |
| const SkRect& rect, |
| const SkStrokeRec& stroke, |
| GrAAType aaType) { |
| bool isMiter; |
| if (!allowed_stroke(stroke, GrAA::kNo, &isMiter)) { |
| return nullptr; |
| } |
| Helper::InputFlags inputFlags = Helper::InputFlags::kNone; |
| // Depending on sub-pixel coordinates and the particular GPU, we may lose a corner of |
| // hairline rects. We jam all the vertices to pixel centers to avoid this, but not |
| // when MSAA is enabled because it can cause ugly artifacts. |
| if (stroke.getStyle() == SkStrokeRec::kHairline_Style && aaType != GrAAType::kMSAA) { |
| inputFlags |= Helper::InputFlags::kSnapVerticesToPixelCenters; |
| } |
| return Helper::FactoryHelper<NonAAStrokeRectOp>(context, std::move(paint), inputFlags, |
| viewMatrix, rect, |
| stroke, aaType); |
| } |
| |
| NonAAStrokeRectOp(GrProcessorSet* processorSet, const SkPMColor4f& color, |
| Helper::InputFlags inputFlags, const SkMatrix& viewMatrix, const SkRect& rect, |
| const SkStrokeRec& stroke, GrAAType aaType) |
| : INHERITED(ClassID()) |
| , fHelper(processorSet, aaType, inputFlags) { |
| fColor = color; |
| fViewMatrix = viewMatrix; |
| fRect = rect; |
| // Sort the rect for hairlines |
| fRect.sort(); |
| fStrokeWidth = stroke.getWidth(); |
| |
| SkScalar rad = SkScalarHalf(fStrokeWidth); |
| SkRect bounds = rect; |
| bounds.outset(rad, rad); |
| |
| // If our caller snaps to pixel centers then we have to round out the bounds |
| if (inputFlags & Helper::InputFlags::kSnapVerticesToPixelCenters) { |
| SkASSERT(!fStrokeWidth || aaType == GrAAType::kNone); |
| viewMatrix.mapRect(&bounds); |
| // We want to be consistent with how we snap non-aa lines. To match what we do in |
| // GrGLSLVertexShaderBuilder, we first floor all the vertex values and then add half a |
| // pixel to force us to pixel centers. |
| bounds.setLTRB(SkScalarFloorToScalar(bounds.fLeft), |
| SkScalarFloorToScalar(bounds.fTop), |
| SkScalarFloorToScalar(bounds.fRight), |
| SkScalarFloorToScalar(bounds.fBottom)); |
| bounds.offset(0.5f, 0.5f); |
| this->setBounds(bounds, HasAABloat::kNo, IsHairline::kNo); |
| } else { |
| HasAABloat aaBloat = (aaType == GrAAType::kNone) ? HasAABloat ::kNo : HasAABloat::kYes; |
| this->setTransformedBounds(bounds, fViewMatrix, aaBloat, |
| fStrokeWidth ? IsHairline::kNo : IsHairline::kYes); |
| } |
| } |
| |
| FixedFunctionFlags fixedFunctionFlags() const override { return fHelper.fixedFunctionFlags(); } |
| |
| GrProcessorSet::Analysis finalize(const GrCaps& caps, const GrAppliedClip* clip, |
| GrClampType clampType) override { |
| // This Op uses uniform (not vertex) color, so doesn't need to track wide color. |
| return fHelper.finalizeProcessors(caps, clip, clampType, GrProcessorAnalysisCoverage::kNone, |
| &fColor, nullptr); |
| } |
| |
| private: |
| GrProgramInfo* programInfo() override { return fProgramInfo; } |
| |
| void onCreateProgramInfo(const GrCaps* caps, |
| SkArenaAlloc* arena, |
| const GrSurfaceProxyView& writeView, |
| bool usesMSAASurface, |
| GrAppliedClip&& clip, |
| const GrDstProxyView& dstProxyView, |
| GrXferBarrierFlags renderPassXferBarriers, |
| GrLoadOp colorLoadOp) override { |
| GrGeometryProcessor* gp; |
| { |
| using namespace GrDefaultGeoProcFactory; |
| Color color(fColor); |
| LocalCoords::Type localCoordsType = fHelper.usesLocalCoords() |
| ? LocalCoords::kUsePosition_Type |
| : LocalCoords::kUnused_Type; |
| gp = GrDefaultGeoProcFactory::Make(arena, color, Coverage::kSolid_Type, localCoordsType, |
| fViewMatrix); |
| } |
| |
| GrPrimitiveType primType = (fStrokeWidth > 0) ? GrPrimitiveType::kTriangleStrip |
| : GrPrimitiveType::kLineStrip; |
| |
| fProgramInfo = fHelper.createProgramInfo(caps, arena, writeView, usesMSAASurface, |
| std::move(clip), dstProxyView, gp, primType, |
| renderPassXferBarriers, colorLoadOp); |
| } |
| |
| void onPrepareDraws(GrMeshDrawTarget* target) override { |
| if (!fProgramInfo) { |
| this->createProgramInfo(target); |
| } |
| |
| size_t kVertexStride = fProgramInfo->geomProc().vertexStride(); |
| int vertexCount = kVertsPerHairlineRect; |
| if (fStrokeWidth > 0) { |
| vertexCount = kVertsPerStrokeRect; |
| } |
| |
| sk_sp<const GrBuffer> vertexBuffer; |
| int firstVertex; |
| |
| void* verts = |
| target->makeVertexSpace(kVertexStride, vertexCount, &vertexBuffer, &firstVertex); |
| |
| if (!verts) { |
| SkDebugf("Could not allocate vertices\n"); |
| return; |
| } |
| |
| SkPoint* vertex = reinterpret_cast<SkPoint*>(verts); |
| |
| if (fStrokeWidth > 0) { |
| init_nonaa_stroke_rect_strip(vertex, fRect, fStrokeWidth); |
| } else { |
| // hairline |
| vertex[0].set(fRect.fLeft, fRect.fTop); |
| vertex[1].set(fRect.fRight, fRect.fTop); |
| vertex[2].set(fRect.fRight, fRect.fBottom); |
| vertex[3].set(fRect.fLeft, fRect.fBottom); |
| vertex[4].set(fRect.fLeft, fRect.fTop); |
| } |
| |
| fMesh = target->allocMesh(); |
| fMesh->set(std::move(vertexBuffer), vertexCount, firstVertex); |
| } |
| |
| void onExecute(GrOpFlushState* flushState, const SkRect& chainBounds) override { |
| if (!fMesh) { |
| return; |
| } |
| |
| flushState->bindPipelineAndScissorClip(*fProgramInfo, chainBounds); |
| flushState->bindTextures(fProgramInfo->geomProc(), nullptr, fProgramInfo->pipeline()); |
| flushState->drawMesh(*fMesh); |
| } |
| |
| #if GR_TEST_UTILS |
| SkString onDumpInfo() const override { |
| return SkStringPrintf("Color: 0x%08x, Rect [L: %.2f, T: %.2f, R: %.2f, B: %.2f], " |
| "StrokeWidth: %.2f\n%s", |
| fColor.toBytes_RGBA(), fRect.fLeft, fRect.fTop, fRect.fRight, |
| fRect.fBottom, fStrokeWidth, fHelper.dumpInfo().c_str()); |
| } |
| #endif |
| |
| // TODO: override onCombineIfPossible |
| |
| Helper fHelper; |
| SkPMColor4f fColor; |
| SkMatrix fViewMatrix; |
| SkRect fRect; |
| SkScalar fStrokeWidth; |
| GrSimpleMesh* fMesh = nullptr; |
| GrProgramInfo* fProgramInfo = nullptr; |
| |
| const static int kVertsPerHairlineRect = 5; |
| const static int kVertsPerStrokeRect = 10; |
| |
| using INHERITED = GrMeshDrawOp; |
| }; |
| |
| /////////////////////////////////////////////////////////////////////////////////////////////////// |
| // AA Stroking |
| /////////////////////////////////////////////////////////////////////////////////////////////////// |
| |
| GR_DECLARE_STATIC_UNIQUE_KEY(gMiterIndexBufferKey); |
| GR_DECLARE_STATIC_UNIQUE_KEY(gBevelIndexBufferKey); |
| |
| bool stroke_dev_half_size_supported(SkVector devHalfStrokeSize) { |
| // Since the horizontal and vertical strokes share internal corners, the coverage value at that |
| // corner needs to be equal for the horizontal and vertical strokes both. |
| // |
| // The inner coverage values will be equal if the horizontal and vertical stroke widths are |
| // equal (in which case innerCoverage is same for all sides of the rects) or if the horizontal |
| // and vertical stroke widths are both greater than 1 (in which case innerCoverage will always |
| // be 1). In actuality we allow them to be nearly-equal since differing by < 1/1000 will not be |
| // visually detectable when the shape is already less than 1px in thickness. |
| return SkScalarNearlyEqual(devHalfStrokeSize.fX, devHalfStrokeSize.fY) || |
| std::min(devHalfStrokeSize.fX, devHalfStrokeSize.fY) >= .5f; |
| } |
| |
| bool compute_aa_rects(const GrCaps& caps, |
| SkRect* devOutside, |
| SkRect* devOutsideAssist, |
| SkRect* devInside, |
| bool* isDegenerate, |
| const SkMatrix& viewMatrix, |
| const SkRect& rect, |
| SkScalar strokeWidth, |
| bool miterStroke, |
| SkVector* devHalfStrokeSize) { |
| SkVector devStrokeSize; |
| if (strokeWidth > 0) { |
| devStrokeSize.set(strokeWidth, strokeWidth); |
| viewMatrix.mapVectors(&devStrokeSize, 1); |
| devStrokeSize.setAbs(devStrokeSize); |
| } else { |
| devStrokeSize.set(SK_Scalar1, SK_Scalar1); |
| } |
| |
| const SkScalar dx = devStrokeSize.fX; |
| const SkScalar dy = devStrokeSize.fY; |
| const SkScalar rx = SkScalarHalf(dx); |
| const SkScalar ry = SkScalarHalf(dy); |
| |
| devHalfStrokeSize->fX = rx; |
| devHalfStrokeSize->fY = ry; |
| |
| SkRect devRect; |
| viewMatrix.mapRect(&devRect, rect); |
| |
| // Clip our draw rect 1 full stroke width plus bloat outside the viewport. This avoids |
| // interpolation precision issues with very large coordinates. |
| const float m = caps.maxRenderTargetSize(); |
| const SkRect visibilityBounds = SkRect::MakeWH(m, m).makeOutset(dx + 1, dy + 1); |
| if (!devRect.intersect(visibilityBounds)) { |
| return false; |
| } |
| |
| *devOutside = devRect; |
| *devOutsideAssist = devRect; |
| *devInside = devRect; |
| |
| devOutside->outset(rx, ry); |
| devInside->inset(rx, ry); |
| |
| // If we have a degenerate stroking rect(ie the stroke is larger than inner rect) then we |
| // make a degenerate inside rect to avoid double hitting. We will also jam all of the points |
| // together when we render these rects. |
| SkScalar spare; |
| { |
| SkScalar w = devRect.width() - dx; |
| SkScalar h = devRect.height() - dy; |
| spare = std::min(w, h); |
| } |
| |
| *isDegenerate = spare <= 0; |
| if (*isDegenerate) { |
| devInside->fLeft = devInside->fRight = devRect.centerX(); |
| devInside->fTop = devInside->fBottom = devRect.centerY(); |
| } |
| |
| // For bevel-stroke, use 2 SkRect instances(devOutside and devOutsideAssist) |
| // to draw the outside of the octagon. Because there are 8 vertices on the outer |
| // edge, while vertex number of inner edge is 4, the same as miter-stroke. |
| if (!miterStroke) { |
| devOutside->inset(0, ry); |
| devOutsideAssist->outset(0, ry); |
| } |
| |
| return true; |
| } |
| |
| GrGeometryProcessor* create_aa_stroke_rect_gp(SkArenaAlloc* arena, |
| bool usesMSAASurface, |
| bool tweakAlphaForCoverage, |
| const SkMatrix& viewMatrix, |
| bool usesLocalCoords, |
| bool wideColor) { |
| using namespace GrDefaultGeoProcFactory; |
| |
| // When MSAA is enabled, we have to extend our AA bloats and interpolate coverage values outside |
| // 0..1. We tell the gp in this case that coverage is an unclamped attribute so it will call |
| // saturate(coverage) in the fragment shader. |
| Coverage::Type coverageType = usesMSAASurface ? Coverage::kAttributeUnclamped_Type |
| : (!tweakAlphaForCoverage ? Coverage::kAttribute_Type |
| : Coverage::kSolid_Type); |
| LocalCoords::Type localCoordsType = |
| usesLocalCoords ? LocalCoords::kUsePosition_Type : LocalCoords::kUnused_Type; |
| Color::Type colorType = |
| wideColor ? Color::kPremulWideColorAttribute_Type: Color::kPremulGrColorAttribute_Type; |
| |
| return MakeForDeviceSpace(arena, colorType, coverageType, localCoordsType, viewMatrix); |
| } |
| |
| class AAStrokeRectOp final : public GrMeshDrawOp { |
| private: |
| using Helper = GrSimpleMeshDrawOpHelper; |
| |
| public: |
| DEFINE_OP_CLASS_ID |
| |
| // TODO support AA rotated stroke rects by copying around view matrices |
| struct RectInfo { |
| SkPMColor4f fColor; |
| SkRect fDevOutside; |
| SkRect fDevOutsideAssist; |
| SkRect fDevInside; |
| SkVector fDevHalfStrokeSize; |
| bool fDegenerate; |
| }; |
| |
| static GrOp::Owner Make(GrRecordingContext* context, |
| GrPaint&& paint, |
| const SkMatrix& viewMatrix, |
| const SkRect& devOutside, |
| const SkRect& devInside, |
| const SkVector& devHalfStrokeSize) { |
| if (!viewMatrix.rectStaysRect()) { |
| // The AA op only supports axis-aligned rectangles |
| return nullptr; |
| } |
| if (!stroke_dev_half_size_supported(devHalfStrokeSize)) { |
| return nullptr; |
| } |
| return Helper::FactoryHelper<AAStrokeRectOp>(context, std::move(paint), viewMatrix, |
| devOutside, devInside, devHalfStrokeSize); |
| } |
| |
| AAStrokeRectOp(GrProcessorSet* processorSet, const SkPMColor4f& color, |
| const SkMatrix& viewMatrix, const SkRect& devOutside, const SkRect& devInside, |
| const SkVector& devHalfStrokeSize) |
| : INHERITED(ClassID()) |
| , fHelper(processorSet, GrAAType::kCoverage) |
| , fViewMatrix(viewMatrix) { |
| SkASSERT(!devOutside.isEmpty()); |
| SkASSERT(!devInside.isEmpty()); |
| |
| fRects.emplace_back(RectInfo{color, devOutside, devOutside, devInside, devHalfStrokeSize, false}); |
| this->setBounds(devOutside, HasAABloat::kYes, IsHairline::kNo); |
| fMiterStroke = true; |
| } |
| |
| static GrOp::Owner Make(GrRecordingContext* context, |
| GrPaint&& paint, |
| const SkMatrix& viewMatrix, |
| const SkRect& rect, |
| const SkStrokeRec& stroke) { |
| if (!viewMatrix.rectStaysRect()) { |
| // The AA op only supports axis-aligned rectangles |
| return nullptr; |
| } |
| bool isMiter; |
| if (!allowed_stroke(stroke, GrAA::kYes, &isMiter)) { |
| return nullptr; |
| } |
| RectInfo info; |
| if (!compute_aa_rects(*context->priv().caps(), |
| &info.fDevOutside, |
| &info.fDevOutsideAssist, |
| &info.fDevInside, |
| &info.fDegenerate, |
| viewMatrix, |
| rect, |
| stroke.getWidth(), |
| isMiter, |
| &info.fDevHalfStrokeSize)) { |
| return nullptr; |
| } |
| if (!stroke_dev_half_size_supported(info.fDevHalfStrokeSize)) { |
| return nullptr; |
| } |
| return Helper::FactoryHelper<AAStrokeRectOp>(context, std::move(paint), viewMatrix, info, |
| isMiter); |
| } |
| |
| AAStrokeRectOp(GrProcessorSet* processorSet, const SkPMColor4f& color, |
| const SkMatrix& viewMatrix, const RectInfo& infoExceptColor, bool isMiter) |
| : INHERITED(ClassID()) |
| , fHelper(processorSet, GrAAType::kCoverage) |
| , fViewMatrix(viewMatrix) { |
| fMiterStroke = isMiter; |
| RectInfo& info = fRects.push_back(infoExceptColor); |
| info.fColor = color; |
| if (isMiter) { |
| this->setBounds(info.fDevOutside, HasAABloat::kYes, IsHairline::kNo); |
| } else { |
| // The outer polygon of the bevel stroke is an octagon specified by the points of a |
| // pair of overlapping rectangles where one is wide and the other is narrow. |
| SkRect bounds = info.fDevOutside; |
| bounds.joinPossiblyEmptyRect(info.fDevOutsideAssist); |
| this->setBounds(bounds, HasAABloat::kYes, IsHairline::kNo); |
| } |
| } |
| |
| const char* name() const override { return "AAStrokeRect"; } |
| |
| void visitProxies(const GrVisitProxyFunc& 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, |
| GrClampType clampType) override { |
| return fHelper.finalizeProcessors(caps, clip, clampType, |
| GrProcessorAnalysisCoverage::kSingleChannel, |
| &fRects.back().fColor, &fWideColor); |
| } |
| |
| private: |
| GrProgramInfo* programInfo() override { return fProgramInfo; } |
| |
| bool compatibleWithCoverageAsAlpha(bool usesMSAASurface) const { |
| // When MSAA is enabled, we have to extend our AA bloats and interpolate coverage values |
| // outside 0..1. This makes us incompatible with coverage as alpha. |
| return !usesMSAASurface && fHelper.compatibleWithCoverageAsAlpha(); |
| } |
| |
| void onCreateProgramInfo(const GrCaps*, |
| SkArenaAlloc*, |
| const GrSurfaceProxyView& writeView, |
| bool usesMSAASurface, |
| GrAppliedClip&&, |
| const GrDstProxyView&, |
| GrXferBarrierFlags renderPassXferBarriers, |
| GrLoadOp colorLoadOp) override; |
| |
| void onPrepareDraws(GrMeshDrawTarget*) override; |
| void onExecute(GrOpFlushState*, const SkRect& chainBounds) override; |
| |
| #if GR_TEST_UTILS |
| SkString onDumpInfo() const override { |
| SkString string; |
| for (const auto& info : fRects) { |
| string.appendf( |
| "Color: 0x%08x, ORect [L: %.2f, T: %.2f, R: %.2f, B: %.2f], " |
| "AssistORect [L: %.2f, T: %.2f, R: %.2f, B: %.2f], " |
| "IRect [L: %.2f, T: %.2f, R: %.2f, B: %.2f], Degen: %d", |
| info.fColor.toBytes_RGBA(), info.fDevOutside.fLeft, info.fDevOutside.fTop, |
| info.fDevOutside.fRight, info.fDevOutside.fBottom, info.fDevOutsideAssist.fLeft, |
| info.fDevOutsideAssist.fTop, info.fDevOutsideAssist.fRight, |
| info.fDevOutsideAssist.fBottom, info.fDevInside.fLeft, info.fDevInside.fTop, |
| info.fDevInside.fRight, info.fDevInside.fBottom, info.fDegenerate); |
| } |
| string += fHelper.dumpInfo(); |
| return string; |
| } |
| #endif |
| |
| static const int kMiterIndexCnt = 3 * 24; |
| static const int kMiterVertexCnt = 16; |
| static const int kNumMiterRectsInIndexBuffer = 256; |
| |
| static const int kBevelIndexCnt = 48 + 36 + 24; |
| static const int kBevelVertexCnt = 24; |
| static const int kNumBevelRectsInIndexBuffer = 256; |
| |
| static sk_sp<const GrGpuBuffer> GetIndexBuffer(GrResourceProvider*, bool miterStroke); |
| |
| const SkMatrix& viewMatrix() const { return fViewMatrix; } |
| bool miterStroke() const { return fMiterStroke; } |
| |
| CombineResult onCombineIfPossible(GrOp* t, SkArenaAlloc*, const GrCaps&) override; |
| |
| void generateAAStrokeRectGeometry(VertexWriter& vertices, |
| const SkPMColor4f& color, |
| bool wideColor, |
| const SkRect& devOutside, |
| const SkRect& devOutsideAssist, |
| const SkRect& devInside, |
| bool miterStroke, |
| bool degenerate, |
| const SkVector& devHalfStrokeSize, |
| bool usesMSAASurface) const; |
| |
| Helper fHelper; |
| SkSTArray<1, RectInfo, true> fRects; |
| SkMatrix fViewMatrix; |
| GrSimpleMesh* fMesh = nullptr; |
| GrProgramInfo* fProgramInfo = nullptr; |
| bool fMiterStroke; |
| bool fWideColor; |
| |
| using INHERITED = GrMeshDrawOp; |
| }; |
| |
| void AAStrokeRectOp::onCreateProgramInfo(const GrCaps* caps, |
| SkArenaAlloc* arena, |
| const GrSurfaceProxyView& writeView, |
| bool usesMSAASurface, |
| GrAppliedClip&& appliedClip, |
| const GrDstProxyView& dstProxyView, |
| GrXferBarrierFlags renderPassXferBarriers, |
| GrLoadOp colorLoadOp) { |
| |
| GrGeometryProcessor* gp = create_aa_stroke_rect_gp( |
| arena, |
| usesMSAASurface, |
| this->compatibleWithCoverageAsAlpha(usesMSAASurface), |
| this->viewMatrix(), |
| fHelper.usesLocalCoords(), |
| fWideColor); |
| if (!gp) { |
| SkDebugf("Couldn't create GrGeometryProcessor\n"); |
| return; |
| } |
| |
| fProgramInfo = fHelper.createProgramInfo(caps, |
| arena, |
| writeView, |
| usesMSAASurface, |
| std::move(appliedClip), |
| dstProxyView, |
| gp, |
| GrPrimitiveType::kTriangles, |
| renderPassXferBarriers, |
| colorLoadOp); |
| } |
| |
| void AAStrokeRectOp::onPrepareDraws(GrMeshDrawTarget* target) { |
| |
| if (!fProgramInfo) { |
| this->createProgramInfo(target); |
| if (!fProgramInfo) { |
| return; |
| } |
| } |
| |
| int innerVertexNum = 4; |
| int outerVertexNum = this->miterStroke() ? 4 : 8; |
| int verticesPerInstance = (outerVertexNum + innerVertexNum) * 2; |
| int indicesPerInstance = this->miterStroke() ? kMiterIndexCnt : kBevelIndexCnt; |
| int instanceCount = fRects.count(); |
| int maxQuads = this->miterStroke() ? kNumMiterRectsInIndexBuffer : kNumBevelRectsInIndexBuffer; |
| |
| sk_sp<const GrGpuBuffer> indexBuffer = |
| GetIndexBuffer(target->resourceProvider(), this->miterStroke()); |
| if (!indexBuffer) { |
| SkDebugf("Could not allocate indices\n"); |
| return; |
| } |
| PatternHelper helper(target, GrPrimitiveType::kTriangles, |
| fProgramInfo->geomProc().vertexStride(), std::move(indexBuffer), |
| verticesPerInstance, indicesPerInstance, instanceCount, maxQuads); |
| VertexWriter vertices{ helper.vertices() }; |
| if (!vertices) { |
| SkDebugf("Could not allocate vertices\n"); |
| return; |
| } |
| |
| for (int i = 0; i < instanceCount; i++) { |
| const RectInfo& info = fRects[i]; |
| this->generateAAStrokeRectGeometry(vertices, |
| info.fColor, |
| fWideColor, |
| info.fDevOutside, |
| info.fDevOutsideAssist, |
| info.fDevInside, |
| fMiterStroke, |
| info.fDegenerate, |
| info.fDevHalfStrokeSize, |
| target->usesMSAASurface()); |
| } |
| fMesh = helper.mesh(); |
| } |
| |
| void AAStrokeRectOp::onExecute(GrOpFlushState* flushState, const SkRect& chainBounds) { |
| if (!fProgramInfo || !fMesh) { |
| return; |
| } |
| |
| flushState->bindPipelineAndScissorClip(*fProgramInfo, chainBounds); |
| flushState->bindTextures(fProgramInfo->geomProc(), nullptr, fProgramInfo->pipeline()); |
| flushState->drawMesh(*fMesh); |
| } |
| |
| sk_sp<const GrGpuBuffer> AAStrokeRectOp::GetIndexBuffer(GrResourceProvider* resourceProvider, |
| bool miterStroke) { |
| if (miterStroke) { |
| // clang-format off |
| static const uint16_t gMiterIndices[] = { |
| 0 + 0, 1 + 0, 5 + 0, 5 + 0, 4 + 0, 0 + 0, |
| 1 + 0, 2 + 0, 6 + 0, 6 + 0, 5 + 0, 1 + 0, |
| 2 + 0, 3 + 0, 7 + 0, 7 + 0, 6 + 0, 2 + 0, |
| 3 + 0, 0 + 0, 4 + 0, 4 + 0, 7 + 0, 3 + 0, |
| |
| 0 + 4, 1 + 4, 5 + 4, 5 + 4, 4 + 4, 0 + 4, |
| 1 + 4, 2 + 4, 6 + 4, 6 + 4, 5 + 4, 1 + 4, |
| 2 + 4, 3 + 4, 7 + 4, 7 + 4, 6 + 4, 2 + 4, |
| 3 + 4, 0 + 4, 4 + 4, 4 + 4, 7 + 4, 3 + 4, |
| |
| 0 + 8, 1 + 8, 5 + 8, 5 + 8, 4 + 8, 0 + 8, |
| 1 + 8, 2 + 8, 6 + 8, 6 + 8, 5 + 8, 1 + 8, |
| 2 + 8, 3 + 8, 7 + 8, 7 + 8, 6 + 8, 2 + 8, |
| 3 + 8, 0 + 8, 4 + 8, 4 + 8, 7 + 8, 3 + 8, |
| }; |
| // clang-format on |
| static_assert(SK_ARRAY_COUNT(gMiterIndices) == kMiterIndexCnt); |
| GR_DEFINE_STATIC_UNIQUE_KEY(gMiterIndexBufferKey); |
| return resourceProvider->findOrCreatePatternedIndexBuffer( |
| gMiterIndices, kMiterIndexCnt, kNumMiterRectsInIndexBuffer, kMiterVertexCnt, |
| gMiterIndexBufferKey); |
| } else { |
| /** |
| * As in miter-stroke, index = a + b, and a is the current index, b is the shift |
| * from the first index. The index layout: |
| * outer AA line: 0~3, 4~7 |
| * outer edge: 8~11, 12~15 |
| * inner edge: 16~19 |
| * inner AA line: 20~23 |
| * Following comes a bevel-stroke rect and its indices: |
| * |
| * 4 7 |
| * ********************************* |
| * * ______________________________ * |
| * * / 12 15 \ * |
| * * / \ * |
| * 0 * |8 16_____________________19 11 | * 3 |
| * * | | | | * |
| * * | | **************** | | * |
| * * | | * 20 23 * | | * |
| * * | | * * | | * |
| * * | | * 21 22 * | | * |
| * * | | **************** | | * |
| * * | |____________________| | * |
| * 1 * |9 17 18 10| * 2 |
| * * \ / * |
| * * \13 __________________________14/ * |
| * * * |
| * ********************************** |
| * 5 6 |
| */ |
| // clang-format off |
| static const uint16_t gBevelIndices[] = { |
| // Draw outer AA, from outer AA line to outer edge, shift is 0. |
| 0 + 0, 1 + 0, 9 + 0, 9 + 0, 8 + 0, 0 + 0, |
| 1 + 0, 5 + 0, 13 + 0, 13 + 0, 9 + 0, 1 + 0, |
| 5 + 0, 6 + 0, 14 + 0, 14 + 0, 13 + 0, 5 + 0, |
| 6 + 0, 2 + 0, 10 + 0, 10 + 0, 14 + 0, 6 + 0, |
| 2 + 0, 3 + 0, 11 + 0, 11 + 0, 10 + 0, 2 + 0, |
| 3 + 0, 7 + 0, 15 + 0, 15 + 0, 11 + 0, 3 + 0, |
| 7 + 0, 4 + 0, 12 + 0, 12 + 0, 15 + 0, 7 + 0, |
| 4 + 0, 0 + 0, 8 + 0, 8 + 0, 12 + 0, 4 + 0, |
| |
| // Draw the stroke, from outer edge to inner edge, shift is 8. |
| 0 + 8, 1 + 8, 9 + 8, 9 + 8, 8 + 8, 0 + 8, |
| 1 + 8, 5 + 8, 9 + 8, |
| 5 + 8, 6 + 8, 10 + 8, 10 + 8, 9 + 8, 5 + 8, |
| 6 + 8, 2 + 8, 10 + 8, |
| 2 + 8, 3 + 8, 11 + 8, 11 + 8, 10 + 8, 2 + 8, |
| 3 + 8, 7 + 8, 11 + 8, |
| 7 + 8, 4 + 8, 8 + 8, 8 + 8, 11 + 8, 7 + 8, |
| 4 + 8, 0 + 8, 8 + 8, |
| |
| // Draw the inner AA, from inner edge to inner AA line, shift is 16. |
| 0 + 16, 1 + 16, 5 + 16, 5 + 16, 4 + 16, 0 + 16, |
| 1 + 16, 2 + 16, 6 + 16, 6 + 16, 5 + 16, 1 + 16, |
| 2 + 16, 3 + 16, 7 + 16, 7 + 16, 6 + 16, 2 + 16, |
| 3 + 16, 0 + 16, 4 + 16, 4 + 16, 7 + 16, 3 + 16, |
| }; |
| // clang-format on |
| static_assert(SK_ARRAY_COUNT(gBevelIndices) == kBevelIndexCnt); |
| |
| GR_DEFINE_STATIC_UNIQUE_KEY(gBevelIndexBufferKey); |
| return resourceProvider->findOrCreatePatternedIndexBuffer( |
| gBevelIndices, kBevelIndexCnt, kNumBevelRectsInIndexBuffer, kBevelVertexCnt, |
| gBevelIndexBufferKey); |
| } |
| } |
| |
| GrOp::CombineResult AAStrokeRectOp::onCombineIfPossible(GrOp* t, SkArenaAlloc*, const GrCaps& caps) |
| { |
| AAStrokeRectOp* that = t->cast<AAStrokeRectOp>(); |
| |
| if (!fHelper.isCompatible(that->fHelper, caps, this->bounds(), that->bounds())) { |
| return CombineResult::kCannotCombine; |
| } |
| |
| // TODO combine across miterstroke changes |
| if (this->miterStroke() != that->miterStroke()) { |
| return CombineResult::kCannotCombine; |
| } |
| |
| // We apply the viewmatrix to the rect points on the cpu. However, if the pipeline uses |
| // local coords then we won't be able to combine. TODO: Upload local coords as an attribute. |
| if (fHelper.usesLocalCoords() && |
| !SkMatrixPriv::CheapEqual(this->viewMatrix(), that->viewMatrix())) |
| { |
| return CombineResult::kCannotCombine; |
| } |
| |
| fRects.push_back_n(that->fRects.count(), that->fRects.begin()); |
| fWideColor |= that->fWideColor; |
| return CombineResult::kMerged; |
| } |
| |
| void AAStrokeRectOp::generateAAStrokeRectGeometry(VertexWriter& vertices, |
| const SkPMColor4f& color, |
| bool wideColor, |
| const SkRect& devOutside, |
| const SkRect& devOutsideAssist, |
| const SkRect& devInside, |
| bool miterStroke, |
| bool degenerate, |
| const SkVector& devHalfStrokeSize, |
| bool usesMSAASurface) const { |
| // We create vertices for four nested rectangles. There are two ramps from 0 to full |
| // coverage, one on the exterior of the stroke and the other on the interior. |
| |
| // The following code only works if either devStrokeSize's fX and fY are |
| // equal (in which case innerCoverage is same for all sides of the rects) or |
| // if devStrokeSize's fX and fY are both greater than 1.0 (in which case |
| // innerCoverage will always be 1). |
| SkASSERT(stroke_dev_half_size_supported(devHalfStrokeSize)); |
| |
| auto inset_fan = [](const SkRect& r, SkScalar dx, SkScalar dy) { |
| return VertexWriter::TriFanFromRect(r.makeInset(dx, dy)); |
| }; |
| |
| bool tweakAlphaForCoverage = this->compatibleWithCoverageAsAlpha(usesMSAASurface); |
| |
| auto maybe_coverage = [tweakAlphaForCoverage](float coverage) { |
| return VertexWriter::If(!tweakAlphaForCoverage, coverage); |
| }; |
| |
| // How much do we inset toward the inside of the strokes? |
| float inset = std::min(0.5f, std::min(devHalfStrokeSize.fX, devHalfStrokeSize.fY)); |
| float innerCoverage = 1; |
| if (inset < 0.5f) { |
| // Stroke is subpixel, so reduce the coverage to simulate the narrower strokes. |
| innerCoverage = 2 * inset / (inset + .5f); |
| } |
| |
| // How much do we outset away from the outside of the strokes? |
| // We always want to keep the AA picture frame one pixel wide. |
| float outset = 1 - inset; |
| float outerCoverage = 0; |
| |
| // How much do we outset away from the interior side of the stroke (toward the center)? |
| float interiorOutset = outset; |
| float interiorCoverage = outerCoverage; |
| |
| if (usesMSAASurface) { |
| // Since we're using MSAA, extend our outsets to ensure any pixel with partial coverage has |
| // a full sample mask. |
| constexpr float msaaExtraBloat = SK_ScalarSqrt2 - .5f; |
| outset += msaaExtraBloat; |
| outerCoverage -= msaaExtraBloat; |
| |
| float insetExtraBloat = |
| std::min(inset + msaaExtraBloat, |
| std::min(devHalfStrokeSize.fX, devHalfStrokeSize.fY)) - inset; |
| inset += insetExtraBloat; |
| innerCoverage += insetExtraBloat; |
| |
| float interiorExtraBloat = |
| std::min(interiorOutset + msaaExtraBloat, |
| std::min(devInside.width(), devInside.height()) / 2) - interiorOutset; |
| interiorOutset += interiorExtraBloat; |
| interiorCoverage -= interiorExtraBloat; |
| } |
| |
| GrVertexColor innerColor(tweakAlphaForCoverage ? color * innerCoverage : color, wideColor); |
| GrVertexColor outerColor(tweakAlphaForCoverage ? SK_PMColor4fTRANSPARENT : color, wideColor); |
| |
| // Exterior outset rect (away from stroke). |
| vertices.writeQuad(inset_fan(devOutside, -outset, -outset), |
| outerColor, |
| maybe_coverage(outerCoverage)); |
| |
| if (!miterStroke) { |
| // Second exterior outset. |
| vertices.writeQuad(inset_fan(devOutsideAssist, -outset, -outset), |
| outerColor, |
| maybe_coverage(outerCoverage)); |
| } |
| |
| // Exterior inset rect (toward stroke). |
| vertices.writeQuad(inset_fan(devOutside, inset, inset), |
| innerColor, |
| maybe_coverage(innerCoverage)); |
| |
| if (!miterStroke) { |
| // Second exterior inset. |
| vertices.writeQuad(inset_fan(devOutsideAssist, inset, inset), |
| innerColor, |
| maybe_coverage(innerCoverage)); |
| } |
| |
| if (!degenerate) { |
| // Interior inset rect (toward stroke). |
| vertices.writeQuad(inset_fan(devInside, -inset, -inset), |
| innerColor, |
| maybe_coverage(innerCoverage)); |
| |
| // Interior outset rect (away from stroke, toward center of rect). |
| SkRect interiorAABoundary = devInside.makeInset(interiorOutset, interiorOutset); |
| float coverageBackset = 0; // Adds back coverage when the interior AA edges cross. |
| if (interiorAABoundary.fLeft > interiorAABoundary.fRight) { |
| coverageBackset = |
| (interiorAABoundary.fLeft - interiorAABoundary.fRight) / (interiorOutset * 2); |
| interiorAABoundary.fLeft = interiorAABoundary.fRight = interiorAABoundary.centerX(); |
| } |
| if (interiorAABoundary.fTop > interiorAABoundary.fBottom) { |
| coverageBackset = std::max( |
| (interiorAABoundary.fTop - interiorAABoundary.fBottom) / (interiorOutset * 2), |
| coverageBackset); |
| interiorAABoundary.fTop = interiorAABoundary.fBottom = interiorAABoundary.centerY(); |
| } |
| if (coverageBackset > 0) { |
| // The interior edges crossed. Lerp back toward innerCoverage, which is what this op |
| // will draw in the degenerate case. This gives a smooth transition into the degenerate |
| // case. |
| interiorCoverage += interiorCoverage * (1 - coverageBackset) + |
| innerCoverage * coverageBackset; |
| } |
| GrVertexColor interiorColor(tweakAlphaForCoverage ? color * interiorCoverage : color, |
| wideColor); |
| vertices.writeQuad(VertexWriter::TriFanFromRect(interiorAABoundary), |
| interiorColor, |
| maybe_coverage(interiorCoverage)); |
| } else { |
| // When the interior rect has become degenerate we smoosh to a single point |
| SkASSERT(devInside.fLeft == devInside.fRight && devInside.fTop == devInside.fBottom); |
| |
| vertices.writeQuad(VertexWriter::TriFanFromRect(devInside), |
| innerColor, |
| maybe_coverage(innerCoverage)); |
| |
| // ... unless we are degenerate, in which case we must apply the scaled coverage |
| vertices.writeQuad(VertexWriter::TriFanFromRect(devInside), |
| innerColor, |
| maybe_coverage(innerCoverage)); |
| } |
| } |
| |
| } // anonymous namespace |
| |
| GrOp::Owner Make(GrRecordingContext* context, |
| GrPaint&& paint, |
| GrAAType aaType, |
| const SkMatrix& viewMatrix, |
| const SkRect& rect, |
| const SkStrokeRec& stroke) { |
| SkASSERT(!context->priv().caps()->reducedShaderMode()); |
| if (aaType == GrAAType::kCoverage) { |
| return AAStrokeRectOp::Make(context, std::move(paint), viewMatrix, rect, stroke); |
| } else { |
| return NonAAStrokeRectOp::Make(context, std::move(paint), viewMatrix, rect, stroke, aaType); |
| } |
| } |
| |
| GrOp::Owner MakeNested(GrRecordingContext* context, |
| GrPaint&& paint, |
| const SkMatrix& viewMatrix, |
| const SkRect rects[2]) { |
| SkASSERT(viewMatrix.rectStaysRect()); |
| SkASSERT(!rects[0].isEmpty() && !rects[1].isEmpty()); |
| |
| SkRect devOutside = viewMatrix.mapRect(rects[0]); |
| SkRect devInside = viewMatrix.mapRect(rects[1]); |
| float dx = devOutside.fRight - devInside.fRight; |
| float dy = devOutside.fBottom - devInside.fBottom; |
| |
| // Clips our draw rects 1 full pixel outside the viewport. This avoids interpolation precision |
| // issues with very large coordinates. |
| const float m = context->priv().caps()->maxRenderTargetSize(); |
| const SkRect visibilityBounds = SkRect::MakeWH(m, m).makeOutset(1, 1); |
| |
| if (!devOutside.intersect(visibilityBounds.makeOutset(dx, dy))) { |
| return nullptr; |
| } |
| |
| if (devInside.isEmpty() || !devInside.intersect(visibilityBounds)) { |
| if (devOutside.isEmpty()) { |
| return nullptr; |
| } |
| DrawQuad quad{GrQuad::MakeFromRect(rects[0], viewMatrix), GrQuad(rects[0]), |
| GrQuadAAFlags::kAll}; |
| return FillRectOp::Make(context, std::move(paint), GrAAType::kCoverage, &quad); |
| } |
| |
| return AAStrokeRectOp::Make(context, std::move(paint), viewMatrix, devOutside, |
| devInside, SkVector{dx, dy} * .5f); |
| } |
| |
| } // namespace skgpu::v1::StrokeRectOp |
| |
| #if GR_TEST_UTILS |
| |
| #include "src/gpu/GrDrawOpTest.h" |
| |
| GR_DRAW_OP_TEST_DEFINE(NonAAStrokeRectOp) { |
| SkMatrix viewMatrix = GrTest::TestMatrix(random); |
| SkRect rect = GrTest::TestRect(random); |
| SkScalar strokeWidth = random->nextBool() ? 0.0f : 2.0f; |
| SkPaint strokePaint; |
| strokePaint.setStrokeWidth(strokeWidth); |
| strokePaint.setStyle(SkPaint::kStroke_Style); |
| strokePaint.setStrokeJoin(SkPaint::kMiter_Join); |
| SkStrokeRec strokeRec(strokePaint); |
| GrAAType aaType = GrAAType::kNone; |
| if (numSamples > 1) { |
| aaType = random->nextBool() ? GrAAType::kMSAA : GrAAType::kNone; |
| } |
| return skgpu::v1::StrokeRectOp::NonAAStrokeRectOp::Make(context, std::move(paint), viewMatrix, |
| rect, strokeRec, aaType); |
| } |
| |
| GR_DRAW_OP_TEST_DEFINE(AAStrokeRectOp) { |
| bool miterStroke = random->nextBool(); |
| |
| // Create either a empty rect or a non-empty rect. |
| SkRect rect = |
| random->nextBool() ? SkRect::MakeXYWH(10, 10, 50, 40) : SkRect::MakeXYWH(6, 7, 0, 0); |
| SkScalar minDim = std::min(rect.width(), rect.height()); |
| SkScalar strokeWidth = random->nextUScalar1() * minDim; |
| |
| SkStrokeRec rec(SkStrokeRec::kFill_InitStyle); |
| rec.setStrokeStyle(strokeWidth); |
| rec.setStrokeParams(SkPaint::kButt_Cap, |
| miterStroke ? SkPaint::kMiter_Join : SkPaint::kBevel_Join, 1.f); |
| SkMatrix matrix = GrTest::TestMatrixRectStaysRect(random); |
| return skgpu::v1::StrokeRectOp::AAStrokeRectOp::Make(context, std::move(paint), matrix, rect, |
| rec); |
| } |
| |
| #endif |
