| /* |
| * Copyright 2015 Google Inc. |
| * |
| * Use of this source code is governed by a BSD-style license that can be |
| * found in the LICENSE file. |
| */ |
| |
| #include "GrDefaultGeoProcFactory.h" |
| #include "GrOpFlushState.h" |
| #include "GrRectOpFactory.h" |
| #include "GrResourceKey.h" |
| #include "GrResourceProvider.h" |
| #include "GrSimpleMeshDrawOpHelper.h" |
| #include "SkPointPriv.h" |
| #include "SkStrokeRec.h" |
| |
| GR_DECLARE_STATIC_UNIQUE_KEY(gMiterIndexBufferKey); |
| GR_DECLARE_STATIC_UNIQUE_KEY(gBevelIndexBufferKey); |
| |
| static void set_inset_fan(SkPoint* pts, size_t stride, const SkRect& r, SkScalar dx, SkScalar dy) { |
| SkPointPriv::SetRectFan(pts, r.fLeft + dx, r.fTop + dy, r.fRight - dx, r.fBottom - dy, stride); |
| } |
| |
| // We support all hairlines, bevels, and miters, but not round joins. Also, check whether the miter |
| // limit makes a miter join effectively beveled. |
| inline static bool allowed_stroke(const SkStrokeRec& stroke, 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 true; |
| } |
| if (stroke.getJoin() == SkPaint::kMiter_Join) { |
| *isMiter = stroke.getMiter() >= SK_ScalarSqrt2; |
| return true; |
| } |
| return false; |
| } |
| |
| static void compute_rects(SkRect* devOutside, SkRect* devOutsideAssist, SkRect* devInside, |
| bool* isDegenerate, const SkMatrix& viewMatrix, const SkRect& rect, |
| SkScalar strokeWidth, bool miterStroke) { |
| SkRect devRect; |
| viewMatrix.mapRect(&devRect, rect); |
| |
| 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); |
| |
| *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 = SkTMin(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); |
| } |
| } |
| |
| static sk_sp<GrGeometryProcessor> create_stroke_rect_gp(bool tweakAlphaForCoverage, |
| const SkMatrix& viewMatrix, |
| bool usesLocalCoords) { |
| using namespace GrDefaultGeoProcFactory; |
| |
| Coverage::Type coverageType; |
| if (tweakAlphaForCoverage) { |
| coverageType = Coverage::kSolid_Type; |
| } else { |
| coverageType = Coverage::kAttribute_Type; |
| } |
| LocalCoords::Type localCoordsType = |
| usesLocalCoords ? LocalCoords::kUsePosition_Type : LocalCoords::kUnused_Type; |
| return MakeForDeviceSpace(Color::kPremulGrColorAttribute_Type, coverageType, localCoordsType, |
| viewMatrix); |
| } |
| |
| namespace { |
| |
| class AAStrokeRectOp final : public GrMeshDrawOp { |
| private: |
| using Helper = GrSimpleMeshDrawOpHelper; |
| |
| public: |
| DEFINE_OP_CLASS_ID |
| |
| static std::unique_ptr<GrDrawOp> Make(GrContext* context, |
| GrPaint&& paint, |
| const SkMatrix& viewMatrix, |
| const SkRect& devOutside, |
| const SkRect& devInside) { |
| return Helper::FactoryHelper<AAStrokeRectOp>(context, std::move(paint), viewMatrix, |
| devOutside, devInside); |
| } |
| |
| AAStrokeRectOp(const Helper::MakeArgs& helperArgs, GrColor color, const SkMatrix& viewMatrix, |
| const SkRect& devOutside, const SkRect& devInside) |
| : INHERITED(ClassID()) |
| , fHelper(helperArgs, GrAAType::kCoverage) |
| , fViewMatrix(viewMatrix) { |
| SkASSERT(!devOutside.isEmpty()); |
| SkASSERT(!devInside.isEmpty()); |
| |
| fRects.emplace_back(RectInfo{color, devOutside, devOutside, devInside, false}); |
| this->setBounds(devOutside, HasAABloat::kYes, IsZeroArea::kNo); |
| fMiterStroke = true; |
| } |
| |
| static std::unique_ptr<GrDrawOp> Make(GrContext* context, |
| GrPaint&& paint, |
| const SkMatrix& viewMatrix, |
| const SkRect& rect, |
| const SkStrokeRec& stroke) { |
| bool isMiter; |
| if (!allowed_stroke(stroke, &isMiter)) { |
| return nullptr; |
| } |
| return Helper::FactoryHelper<AAStrokeRectOp>(context, std::move(paint), viewMatrix, rect, |
| stroke, isMiter); |
| } |
| |
| AAStrokeRectOp(const Helper::MakeArgs& helperArgs, GrColor color, const SkMatrix& viewMatrix, |
| const SkRect& rect, const SkStrokeRec& stroke, bool isMiter) |
| : INHERITED(ClassID()) |
| , fHelper(helperArgs, GrAAType::kCoverage) |
| , fViewMatrix(viewMatrix) { |
| fMiterStroke = isMiter; |
| RectInfo& info = fRects.push_back(); |
| compute_rects(&info.fDevOutside, &info.fDevOutsideAssist, &info.fDevInside, |
| &info.fDegenerate, viewMatrix, rect, stroke.getWidth(), isMiter); |
| info.fColor = color; |
| if (isMiter) { |
| this->setBounds(info.fDevOutside, HasAABloat::kYes, IsZeroArea::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, IsZeroArea::kNo); |
| } |
| } |
| |
| const char* name() const override { return "AAStrokeRect"; } |
| |
| void visitProxies(const VisitProxyFunc& func) const override { |
| fHelper.visitProxies(func); |
| } |
| |
| SkString dumpInfo() 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, 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(); |
| string += INHERITED::dumpInfo(); |
| return string; |
| } |
| |
| FixedFunctionFlags fixedFunctionFlags() const override { return fHelper.fixedFunctionFlags(); } |
| |
| RequiresDstTexture finalize(const GrCaps& caps, const GrAppliedClip* clip, |
| GrPixelConfigIsClamped dstIsClamped) override { |
| return fHelper.xpRequiresDstTexture(caps, clip, dstIsClamped, |
| GrProcessorAnalysisCoverage::kSingleChannel, |
| &fRects.back().fColor); |
| } |
| |
| private: |
| void onPrepareDraws(Target*) override; |
| |
| 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 GrBuffer> GetIndexBuffer(GrResourceProvider*, bool miterStroke); |
| |
| const SkMatrix& viewMatrix() const { return fViewMatrix; } |
| bool miterStroke() const { return fMiterStroke; } |
| |
| bool onCombineIfPossible(GrOp* t, const GrCaps&) override; |
| |
| void generateAAStrokeRectGeometry(void* vertices, |
| size_t offset, |
| size_t vertexStride, |
| int outerVertexNum, |
| int innerVertexNum, |
| GrColor color, |
| const SkRect& devOutside, |
| const SkRect& devOutsideAssist, |
| const SkRect& devInside, |
| bool miterStroke, |
| bool degenerate, |
| bool tweakAlphaForCoverage) const; |
| |
| // TODO support AA rotated stroke rects by copying around view matrices |
| struct RectInfo { |
| GrColor fColor; |
| SkRect fDevOutside; |
| SkRect fDevOutsideAssist; |
| SkRect fDevInside; |
| bool fDegenerate; |
| }; |
| |
| Helper fHelper; |
| SkSTArray<1, RectInfo, true> fRects; |
| SkMatrix fViewMatrix; |
| bool fMiterStroke; |
| |
| typedef GrMeshDrawOp INHERITED; |
| }; |
| |
| } // anonymous namespace |
| |
| void AAStrokeRectOp::onPrepareDraws(Target* target) { |
| sk_sp<GrGeometryProcessor> gp(create_stroke_rect_gp(fHelper.compatibleWithAlphaAsCoverage(), |
| this->viewMatrix(), |
| fHelper.usesLocalCoords())); |
| if (!gp) { |
| SkDebugf("Couldn't create GrGeometryProcessor\n"); |
| return; |
| } |
| |
| size_t vertexStride = fHelper.compatibleWithAlphaAsCoverage() |
| ? sizeof(GrDefaultGeoProcFactory::PositionColorAttr) |
| : sizeof(GrDefaultGeoProcFactory::PositionColorCoverageAttr); |
| |
| SkASSERT(vertexStride == gp->debugOnly_vertexStride()); |
| int innerVertexNum = 4; |
| int outerVertexNum = this->miterStroke() ? 4 : 8; |
| int verticesPerInstance = (outerVertexNum + innerVertexNum) * 2; |
| int indicesPerInstance = this->miterStroke() ? kMiterIndexCnt : kBevelIndexCnt; |
| int instanceCount = fRects.count(); |
| |
| sk_sp<const GrBuffer> indexBuffer = GetIndexBuffer(target->resourceProvider(), this->miterStroke()); |
| PatternHelper helper(GrPrimitiveType::kTriangles); |
| void* vertices = |
| helper.init(target, vertexStride, indexBuffer.get(), |
| verticesPerInstance, indicesPerInstance, instanceCount); |
| if (!vertices || !indexBuffer) { |
| SkDebugf("Could not allocate vertices\n"); |
| return; |
| } |
| |
| for (int i = 0; i < instanceCount; i++) { |
| const RectInfo& info = fRects[i]; |
| this->generateAAStrokeRectGeometry(vertices, |
| i * verticesPerInstance * vertexStride, |
| vertexStride, |
| outerVertexNum, |
| innerVertexNum, |
| info.fColor, |
| info.fDevOutside, |
| info.fDevOutsideAssist, |
| info.fDevInside, |
| fMiterStroke, |
| info.fDegenerate, |
| fHelper.compatibleWithAlphaAsCoverage()); |
| } |
| helper.recordDraw(target, gp.get(), fHelper.makePipeline(target)); |
| } |
| |
| sk_sp<const GrBuffer> 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 |
| GR_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 |
| GR_STATIC_ASSERT(SK_ARRAY_COUNT(gBevelIndices) == kBevelIndexCnt); |
| |
| GR_DEFINE_STATIC_UNIQUE_KEY(gBevelIndexBufferKey); |
| return resourceProvider->findOrCreatePatternedIndexBuffer( |
| gBevelIndices, kBevelIndexCnt, kNumBevelRectsInIndexBuffer, kBevelVertexCnt, |
| gBevelIndexBufferKey); |
| } |
| } |
| |
| bool AAStrokeRectOp::onCombineIfPossible(GrOp* t, const GrCaps& caps) { |
| AAStrokeRectOp* that = t->cast<AAStrokeRectOp>(); |
| |
| if (!fHelper.isCompatible(that->fHelper, caps, this->bounds(), that->bounds())) { |
| return false; |
| } |
| |
| // TODO combine across miterstroke changes |
| if (this->miterStroke() != that->miterStroke()) { |
| return false; |
| } |
| |
| // 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() && !this->viewMatrix().cheapEqualTo(that->viewMatrix())) { |
| return false; |
| } |
| |
| fRects.push_back_n(that->fRects.count(), that->fRects.begin()); |
| this->joinBounds(*that); |
| return true; |
| } |
| |
| static void setup_scale(int* scale, SkScalar inset) { |
| if (inset < SK_ScalarHalf) { |
| *scale = SkScalarFloorToInt(512.0f * inset / (inset + SK_ScalarHalf)); |
| SkASSERT(*scale >= 0 && *scale <= 255); |
| } else { |
| *scale = 0xff; |
| } |
| } |
| |
| void AAStrokeRectOp::generateAAStrokeRectGeometry(void* vertices, |
| size_t offset, |
| size_t vertexStride, |
| int outerVertexNum, |
| int innerVertexNum, |
| GrColor color, |
| const SkRect& devOutside, |
| const SkRect& devOutsideAssist, |
| const SkRect& devInside, |
| bool miterStroke, |
| bool degenerate, |
| bool tweakAlphaForCoverage) const { |
| intptr_t verts = reinterpret_cast<intptr_t>(vertices) + offset; |
| |
| // 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 pointers refer to the four rects, from outermost to innermost. |
| SkPoint* fan0Pos = reinterpret_cast<SkPoint*>(verts); |
| SkPoint* fan1Pos = reinterpret_cast<SkPoint*>(verts + outerVertexNum * vertexStride); |
| SkPoint* fan2Pos = reinterpret_cast<SkPoint*>(verts + 2 * outerVertexNum * vertexStride); |
| SkPoint* fan3Pos = reinterpret_cast<SkPoint*>( |
| verts + (2 * outerVertexNum + innerVertexNum) * vertexStride); |
| |
| #ifndef SK_IGNORE_THIN_STROKED_RECT_FIX |
| // TODO: this only really works if the X & Y margins are the same all around |
| // the rect (or if they are all >= 1.0). |
| SkScalar inset; |
| if (!degenerate) { |
| inset = SkMinScalar(SK_Scalar1, devOutside.fRight - devInside.fRight); |
| inset = SkMinScalar(inset, devInside.fLeft - devOutside.fLeft); |
| inset = SkMinScalar(inset, devInside.fTop - devOutside.fTop); |
| if (miterStroke) { |
| inset = SK_ScalarHalf * SkMinScalar(inset, devOutside.fBottom - devInside.fBottom); |
| } else { |
| inset = SK_ScalarHalf * |
| SkMinScalar(inset, devOutsideAssist.fBottom - devInside.fBottom); |
| } |
| SkASSERT(inset >= 0); |
| } else { |
| // TODO use real devRect here |
| inset = SkMinScalar(devOutside.width(), SK_Scalar1); |
| inset = SK_ScalarHalf * |
| SkMinScalar(inset, SkTMax(devOutside.height(), devOutsideAssist.height())); |
| } |
| #else |
| SkScalar inset; |
| if (!degenerate) { |
| inset = SK_ScalarHalf; |
| } else { |
| // TODO use real devRect here |
| inset = SkMinScalar(devOutside.width(), SK_Scalar1); |
| inset = SK_ScalarHalf * |
| SkMinScalar(inset, SkTMax(devOutside.height(), devOutsideAssist.height())); |
| } |
| #endif |
| |
| if (miterStroke) { |
| // outermost |
| set_inset_fan(fan0Pos, vertexStride, devOutside, -SK_ScalarHalf, -SK_ScalarHalf); |
| // inner two |
| set_inset_fan(fan1Pos, vertexStride, devOutside, inset, inset); |
| if (!degenerate) { |
| set_inset_fan(fan2Pos, vertexStride, devInside, -inset, -inset); |
| // innermost |
| set_inset_fan(fan3Pos, vertexStride, devInside, SK_ScalarHalf, SK_ScalarHalf); |
| } else { |
| // When the interior rect has become degenerate we smoosh to a single point |
| SkASSERT(devInside.fLeft == devInside.fRight && devInside.fTop == devInside.fBottom); |
| SkPointPriv::SetRectFan(fan2Pos, devInside.fLeft, devInside.fTop, devInside.fRight, |
| devInside.fBottom, vertexStride); |
| SkPointPriv::SetRectFan(fan3Pos, devInside.fLeft, devInside.fTop, devInside.fRight, |
| devInside.fBottom, vertexStride); |
| } |
| } else { |
| SkPoint* fan0AssistPos = reinterpret_cast<SkPoint*>(verts + 4 * vertexStride); |
| SkPoint* fan1AssistPos = |
| reinterpret_cast<SkPoint*>(verts + (outerVertexNum + 4) * vertexStride); |
| // outermost |
| set_inset_fan(fan0Pos, vertexStride, devOutside, -SK_ScalarHalf, -SK_ScalarHalf); |
| set_inset_fan(fan0AssistPos, vertexStride, devOutsideAssist, -SK_ScalarHalf, |
| -SK_ScalarHalf); |
| // outer one of the inner two |
| set_inset_fan(fan1Pos, vertexStride, devOutside, inset, inset); |
| set_inset_fan(fan1AssistPos, vertexStride, devOutsideAssist, inset, inset); |
| if (!degenerate) { |
| // inner one of the inner two |
| set_inset_fan(fan2Pos, vertexStride, devInside, -inset, -inset); |
| // innermost |
| set_inset_fan(fan3Pos, vertexStride, devInside, SK_ScalarHalf, SK_ScalarHalf); |
| } else { |
| // When the interior rect has become degenerate we smoosh to a single point |
| SkASSERT(devInside.fLeft == devInside.fRight && devInside.fTop == devInside.fBottom); |
| SkPointPriv::SetRectFan(fan2Pos, devInside.fLeft, devInside.fTop, devInside.fRight, |
| devInside.fBottom, vertexStride); |
| SkPointPriv::SetRectFan(fan3Pos, devInside.fLeft, devInside.fTop, devInside.fRight, |
| devInside.fBottom, vertexStride); |
| } |
| } |
| |
| // Make verts point to vertex color and then set all the color and coverage vertex attrs |
| // values. The outermost rect has 0 coverage |
| verts += sizeof(SkPoint); |
| for (int i = 0; i < outerVertexNum; ++i) { |
| if (tweakAlphaForCoverage) { |
| *reinterpret_cast<GrColor*>(verts + i * vertexStride) = 0; |
| } else { |
| *reinterpret_cast<GrColor*>(verts + i * vertexStride) = color; |
| *reinterpret_cast<float*>(verts + i * vertexStride + sizeof(GrColor)) = 0; |
| } |
| } |
| |
| // scale is the coverage for the the inner two rects. |
| int scale; |
| setup_scale(&scale, inset); |
| |
| float innerCoverage = GrNormalizeByteToFloat(scale); |
| GrColor scaledColor = (0xff == scale) ? color : SkAlphaMulQ(color, scale); |
| |
| verts += outerVertexNum * vertexStride; |
| for (int i = 0; i < outerVertexNum + innerVertexNum; ++i) { |
| if (tweakAlphaForCoverage) { |
| *reinterpret_cast<GrColor*>(verts + i * vertexStride) = scaledColor; |
| } else { |
| *reinterpret_cast<GrColor*>(verts + i * vertexStride) = color; |
| *reinterpret_cast<float*>(verts + i * vertexStride + sizeof(GrColor)) = innerCoverage; |
| } |
| } |
| |
| // The innermost rect has 0 coverage, unless we are degenerate, in which case we must apply the |
| // scaled coverage |
| verts += (outerVertexNum + innerVertexNum) * vertexStride; |
| if (!degenerate) { |
| innerCoverage = 0; |
| scaledColor = 0; |
| } |
| |
| for (int i = 0; i < innerVertexNum; ++i) { |
| if (tweakAlphaForCoverage) { |
| *reinterpret_cast<GrColor*>(verts + i * vertexStride) = scaledColor; |
| } else { |
| *reinterpret_cast<GrColor*>(verts + i * vertexStride) = color; |
| *reinterpret_cast<float*>(verts + i * vertexStride + sizeof(GrColor)) = innerCoverage; |
| } |
| } |
| } |
| |
| namespace GrRectOpFactory { |
| |
| std::unique_ptr<GrDrawOp> MakeAAFillNestedRects(GrContext* context, |
| GrPaint&& paint, |
| const SkMatrix& viewMatrix, |
| const SkRect rects[2]) { |
| SkASSERT(viewMatrix.rectStaysRect()); |
| SkASSERT(!rects[0].isEmpty() && !rects[1].isEmpty()); |
| |
| SkRect devOutside, devInside; |
| viewMatrix.mapRect(&devOutside, rects[0]); |
| viewMatrix.mapRect(&devInside, rects[1]); |
| if (devInside.isEmpty()) { |
| if (devOutside.isEmpty()) { |
| return nullptr; |
| } |
| return MakeAAFill(context, std::move(paint), viewMatrix, rects[0]); |
| } |
| |
| return AAStrokeRectOp::Make(context, std::move(paint), viewMatrix, devOutside, devInside); |
| } |
| |
| std::unique_ptr<GrDrawOp> MakeAAStroke(GrContext* context, |
| GrPaint&& paint, |
| const SkMatrix& viewMatrix, |
| const SkRect& rect, |
| const SkStrokeRec& stroke) { |
| return AAStrokeRectOp::Make(context, std::move(paint), viewMatrix, rect, stroke); |
| } |
| |
| } // namespace GrRectOpFactory |
| |
| /////////////////////////////////////////////////////////////////////////////////////////////////// |
| |
| #if GR_TEST_UTILS |
| |
| #include "GrDrawOpTest.h" |
| |
| 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 = SkMinScalar(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 GrRectOpFactory::MakeAAStroke(context, std::move(paint), matrix, rect, rec); |
| } |
| |
| #endif |
