| /* |
| * 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 "GrColor.h" |
| #include "GrDefaultGeoProcFactory.h" |
| #include "GrMeshDrawOp.h" |
| #include "GrOpFlushState.h" |
| #include "GrRectOpFactory.h" |
| #include "GrResourceKey.h" |
| #include "GrResourceProvider.h" |
| #include "GrTypes.h" |
| #include "SkMatrix.h" |
| #include "SkRect.h" |
| #include "ops/GrSimpleMeshDrawOpHelper.h" |
| |
| GR_DECLARE_STATIC_UNIQUE_KEY(gAAFillRectIndexBufferKey); |
| |
| static inline bool view_matrix_ok_for_aa_fill_rect(const SkMatrix& viewMatrix) { |
| return viewMatrix.preservesRightAngles(); |
| } |
| |
| static inline void set_inset_fan(SkPoint* pts, size_t stride, const SkRect& r, SkScalar dx, |
| SkScalar dy) { |
| pts->setRectFan(r.fLeft + dx, r.fTop + dy, r.fRight - dx, r.fBottom - dy, stride); |
| } |
| |
| static const int kNumAAFillRectsInIndexBuffer = 256; |
| static const int kVertsPerAAFillRect = 8; |
| static const int kIndicesPerAAFillRect = 30; |
| |
| static sk_sp<const GrBuffer> get_index_buffer(GrResourceProvider* resourceProvider) { |
| GR_DEFINE_STATIC_UNIQUE_KEY(gAAFillRectIndexBufferKey); |
| |
| // clang-format off |
| static const uint16_t gFillAARectIdx[] = { |
| 0, 1, 5, 5, 4, 0, |
| 1, 2, 6, 6, 5, 1, |
| 2, 3, 7, 7, 6, 2, |
| 3, 0, 4, 4, 7, 3, |
| 4, 5, 6, 6, 7, 4, |
| }; |
| // clang-format on |
| |
| GR_STATIC_ASSERT(SK_ARRAY_COUNT(gFillAARectIdx) == kIndicesPerAAFillRect); |
| return resourceProvider->findOrCreatePatternedIndexBuffer( |
| gFillAARectIdx, kIndicesPerAAFillRect, kNumAAFillRectsInIndexBuffer, |
| kVertsPerAAFillRect, gAAFillRectIndexBufferKey); |
| } |
| |
| static void generate_aa_fill_rect_geometry(intptr_t verts, |
| size_t vertexStride, |
| GrColor color, |
| const SkMatrix& viewMatrix, |
| const SkRect& rect, |
| const SkRect& devRect, |
| bool tweakAlphaForCoverage, |
| const SkMatrix* localMatrix) { |
| SkPoint* fan0Pos = reinterpret_cast<SkPoint*>(verts); |
| SkPoint* fan1Pos = reinterpret_cast<SkPoint*>(verts + 4 * vertexStride); |
| |
| SkScalar inset; |
| |
| if (viewMatrix.rectStaysRect()) { |
| inset = SkMinScalar(devRect.width(), SK_Scalar1); |
| inset = SK_ScalarHalf * SkMinScalar(inset, devRect.height()); |
| |
| set_inset_fan(fan0Pos, vertexStride, devRect, -SK_ScalarHalf, -SK_ScalarHalf); |
| set_inset_fan(fan1Pos, vertexStride, devRect, inset, inset); |
| } else { |
| // compute transformed (1, 0) and (0, 1) vectors |
| SkVector vec[2] = {{viewMatrix[SkMatrix::kMScaleX], viewMatrix[SkMatrix::kMSkewY]}, |
| {viewMatrix[SkMatrix::kMSkewX], viewMatrix[SkMatrix::kMScaleY]}}; |
| |
| SkScalar len1 = SkPoint::Normalize(&vec[0]); |
| vec[0].scale(SK_ScalarHalf); |
| SkScalar len2 = SkPoint::Normalize(&vec[1]); |
| vec[1].scale(SK_ScalarHalf); |
| |
| inset = SkMinScalar(len1 * rect.width(), SK_Scalar1); |
| inset = SK_ScalarHalf * SkMinScalar(inset, len2 * rect.height()); |
| |
| // create the rotated rect |
| fan0Pos->setRectFan(rect.fLeft, rect.fTop, rect.fRight, rect.fBottom, vertexStride); |
| viewMatrix.mapPointsWithStride(fan0Pos, vertexStride, 4); |
| |
| // Now create the inset points and then outset the original |
| // rotated points |
| |
| // TL |
| *((SkPoint*)((intptr_t)fan1Pos + 0 * vertexStride)) = |
| *((SkPoint*)((intptr_t)fan0Pos + 0 * vertexStride)) + vec[0] + vec[1]; |
| *((SkPoint*)((intptr_t)fan0Pos + 0 * vertexStride)) -= vec[0] + vec[1]; |
| // BL |
| *((SkPoint*)((intptr_t)fan1Pos + 1 * vertexStride)) = |
| *((SkPoint*)((intptr_t)fan0Pos + 1 * vertexStride)) + vec[0] - vec[1]; |
| *((SkPoint*)((intptr_t)fan0Pos + 1 * vertexStride)) -= vec[0] - vec[1]; |
| // BR |
| *((SkPoint*)((intptr_t)fan1Pos + 2 * vertexStride)) = |
| *((SkPoint*)((intptr_t)fan0Pos + 2 * vertexStride)) - vec[0] - vec[1]; |
| *((SkPoint*)((intptr_t)fan0Pos + 2 * vertexStride)) += vec[0] + vec[1]; |
| // TR |
| *((SkPoint*)((intptr_t)fan1Pos + 3 * vertexStride)) = |
| *((SkPoint*)((intptr_t)fan0Pos + 3 * vertexStride)) - vec[0] + vec[1]; |
| *((SkPoint*)((intptr_t)fan0Pos + 3 * vertexStride)) += vec[0] - vec[1]; |
| } |
| |
| if (localMatrix) { |
| SkMatrix invViewMatrix; |
| if (!viewMatrix.invert(&invViewMatrix)) { |
| SkDebugf("View matrix is non-invertible, local coords will be wrong."); |
| invViewMatrix = SkMatrix::I(); |
| } |
| SkMatrix localCoordMatrix; |
| localCoordMatrix.setConcat(*localMatrix, invViewMatrix); |
| SkPoint* fan0Loc = reinterpret_cast<SkPoint*>(verts + sizeof(SkPoint) + sizeof(GrColor)); |
| localCoordMatrix.mapPointsWithStride(fan0Loc, fan0Pos, vertexStride, 8); |
| } |
| |
| // Make verts point to vertex color and then set all the color and coverage vertex attrs |
| // values. |
| verts += sizeof(SkPoint); |
| |
| // The coverage offset is always the last vertex attribute |
| intptr_t coverageOffset = vertexStride - sizeof(GrColor) - sizeof(SkPoint); |
| for (int i = 0; i < 4; ++i) { |
| if (tweakAlphaForCoverage) { |
| *reinterpret_cast<GrColor*>(verts + i * vertexStride) = 0; |
| } else { |
| *reinterpret_cast<GrColor*>(verts + i * vertexStride) = color; |
| *reinterpret_cast<float*>(verts + i * vertexStride + coverageOffset) = 0; |
| } |
| } |
| |
| int scale; |
| if (inset < SK_ScalarHalf) { |
| scale = SkScalarFloorToInt(512.0f * inset / (inset + SK_ScalarHalf)); |
| SkASSERT(scale >= 0 && scale <= 255); |
| } else { |
| scale = 0xff; |
| } |
| |
| verts += 4 * vertexStride; |
| |
| float innerCoverage = GrNormalizeByteToFloat(scale); |
| GrColor scaledColor = (0xff == scale) ? color : SkAlphaMulQ(color, scale); |
| |
| for (int i = 0; i < 4; ++i) { |
| if (tweakAlphaForCoverage) { |
| *reinterpret_cast<GrColor*>(verts + i * vertexStride) = scaledColor; |
| } else { |
| *reinterpret_cast<GrColor*>(verts + i * vertexStride) = color; |
| *reinterpret_cast<float*>(verts + i * vertexStride + coverageOffset) = innerCoverage; |
| } |
| } |
| } |
| |
| namespace { |
| |
| class AAFillRectOp final : public GrMeshDrawOp { |
| private: |
| using Helper = GrSimpleMeshDrawOpHelperWithStencil; |
| |
| public: |
| DEFINE_OP_CLASS_ID |
| |
| static std::unique_ptr<GrDrawOp> Make(GrPaint&& paint, |
| const SkMatrix& viewMatrix, |
| const SkRect& rect, |
| const SkRect& devRect, |
| const SkMatrix* localMatrix, |
| const GrUserStencilSettings* stencil) { |
| SkASSERT(view_matrix_ok_for_aa_fill_rect(viewMatrix)); |
| return Helper::FactoryHelper<AAFillRectOp>(std::move(paint), viewMatrix, rect, devRect, |
| localMatrix, stencil); |
| } |
| |
| AAFillRectOp(const Helper::MakeArgs& helperArgs, |
| GrColor color, |
| const SkMatrix& viewMatrix, |
| const SkRect& rect, |
| const SkRect& devRect, |
| const SkMatrix* localMatrix, |
| const GrUserStencilSettings* stencil) |
| : INHERITED(ClassID()), fHelper(helperArgs, GrAAType::kCoverage, stencil) { |
| if (localMatrix) { |
| void* mem = fRectData.push_back_n(sizeof(RectWithLocalMatrixInfo)); |
| new (mem) RectWithLocalMatrixInfo(color, viewMatrix, rect, devRect, *localMatrix); |
| } else { |
| void* mem = fRectData.push_back_n(sizeof(RectInfo)); |
| new (mem) RectInfo(color, viewMatrix, rect, devRect); |
| } |
| IsZeroArea zeroArea = |
| (!rect.width() || !rect.height()) ? IsZeroArea::kYes : IsZeroArea::kNo; |
| this->setBounds(devRect, HasAABloat::kYes, zeroArea); |
| fRectCnt = 1; |
| } |
| |
| const char* name() const override { return "AAFillRectOp"; } |
| |
| void visitProxies(const VisitProxyFunc& func) const override { |
| fHelper.visitProxies(func); |
| } |
| |
| SkString dumpInfo() const override { |
| SkString str; |
| str.append(INHERITED::dumpInfo()); |
| str.appendf("# combined: %d\n", fRectCnt); |
| const RectInfo* info = this->first(); |
| for (int i = 0; i < fRectCnt; ++i) { |
| const SkRect& rect = info->rect(); |
| str.appendf("%d: Color: 0x%08x, Rect [L: %.2f, T: %.2f, R: %.2f, B: %.2f]\n", i, |
| info->color(), rect.fLeft, rect.fTop, rect.fRight, rect.fBottom); |
| info = this->next(info); |
| } |
| str += fHelper.dumpInfo(); |
| str += INHERITED::dumpInfo(); |
| return str; |
| } |
| |
| FixedFunctionFlags fixedFunctionFlags() const override { return fHelper.fixedFunctionFlags(); } |
| |
| RequiresDstTexture finalize(const GrCaps& caps, const GrAppliedClip* clip, |
| GrPixelConfigIsClamped dstIsClamped) override { |
| GrColor color = this->first()->color(); |
| auto result = fHelper.xpRequiresDstTexture( |
| caps, clip, dstIsClamped, GrProcessorAnalysisCoverage::kSingleChannel, &color); |
| this->first()->setColor(color); |
| return result; |
| } |
| |
| private: |
| void onPrepareDraws(Target* target) override { |
| using namespace GrDefaultGeoProcFactory; |
| |
| Color color(Color::kPremulGrColorAttribute_Type); |
| Coverage::Type coverageType = fHelper.compatibleWithAlphaAsCoverage() |
| ? Coverage::kSolid_Type |
| : Coverage::kAttribute_Type; |
| LocalCoords lc = fHelper.usesLocalCoords() ? LocalCoords::kHasExplicit_Type |
| : LocalCoords::kUnused_Type; |
| sk_sp<GrGeometryProcessor> gp = |
| GrDefaultGeoProcFactory::Make(color, coverageType, lc, SkMatrix::I()); |
| if (!gp) { |
| SkDebugf("Couldn't create GrGeometryProcessor\n"); |
| return; |
| } |
| |
| size_t vertexStride = gp->getVertexStride(); |
| |
| sk_sp<const GrBuffer> indexBuffer = get_index_buffer(target->resourceProvider()); |
| PatternHelper helper(GrPrimitiveType::kTriangles); |
| void* vertices = |
| helper.init(target, vertexStride, indexBuffer.get(), kVertsPerAAFillRect, |
| kIndicesPerAAFillRect, fRectCnt); |
| if (!vertices || !indexBuffer) { |
| SkDebugf("Could not allocate vertices\n"); |
| return; |
| } |
| |
| const RectInfo* info = this->first(); |
| const SkMatrix* localMatrix = nullptr; |
| for (int i = 0; i < fRectCnt; i++) { |
| intptr_t verts = |
| reinterpret_cast<intptr_t>(vertices) + i * kVertsPerAAFillRect * vertexStride; |
| if (fHelper.usesLocalCoords()) { |
| if (info->hasLocalMatrix()) { |
| localMatrix = &static_cast<const RectWithLocalMatrixInfo*>(info)->localMatrix(); |
| } else { |
| localMatrix = &SkMatrix::I(); |
| } |
| } |
| generate_aa_fill_rect_geometry(verts, vertexStride, info->color(), info->viewMatrix(), |
| info->rect(), info->devRect(), |
| fHelper.compatibleWithAlphaAsCoverage(), localMatrix); |
| info = this->next(info); |
| } |
| helper.recordDraw(target, gp.get(), fHelper.makePipeline(target)); |
| } |
| |
| bool onCombineIfPossible(GrOp* t, const GrCaps& caps) override { |
| AAFillRectOp* that = t->cast<AAFillRectOp>(); |
| if (!fHelper.isCompatible(that->fHelper, caps, this->bounds(), that->bounds())) { |
| return false; |
| } |
| |
| fRectData.push_back_n(that->fRectData.count(), that->fRectData.begin()); |
| fRectCnt += that->fRectCnt; |
| this->joinBounds(*that); |
| return true; |
| } |
| |
| struct RectInfo { |
| public: |
| RectInfo(GrColor color, const SkMatrix& viewMatrix, const SkRect& rect, |
| const SkRect& devRect) |
| : RectInfo(color, viewMatrix, rect, devRect, HasLocalMatrix::kNo) {} |
| bool hasLocalMatrix() const { return HasLocalMatrix::kYes == fHasLocalMatrix; } |
| GrColor color() const { return fColor; } |
| const SkMatrix& viewMatrix() const { return fViewMatrix; } |
| const SkRect& rect() const { return fRect; } |
| const SkRect& devRect() const { return fDevRect; } |
| |
| void setColor(GrColor color) { fColor = color; } |
| |
| protected: |
| enum class HasLocalMatrix : uint32_t { kNo, kYes }; |
| |
| RectInfo(GrColor color, const SkMatrix& viewMatrix, const SkRect& rect, |
| const SkRect& devRect, HasLocalMatrix hasLM) |
| : fHasLocalMatrix(hasLM) |
| , fColor(color) |
| , fViewMatrix(viewMatrix) |
| , fRect(rect) |
| , fDevRect(devRect) {} |
| |
| HasLocalMatrix fHasLocalMatrix; |
| GrColor fColor; |
| SkMatrix fViewMatrix; |
| SkRect fRect; |
| SkRect fDevRect; |
| }; |
| |
| struct RectWithLocalMatrixInfo : public RectInfo { |
| public: |
| RectWithLocalMatrixInfo(GrColor color, const SkMatrix& viewMatrix, const SkRect& rect, |
| const SkRect& devRect, const SkMatrix& localMatrix) |
| : RectInfo(color, viewMatrix, rect, devRect, HasLocalMatrix::kYes) |
| , fLocalMatrix(localMatrix) {} |
| const SkMatrix& localMatrix() const { return fLocalMatrix; } |
| |
| private: |
| SkMatrix fLocalMatrix; |
| }; |
| |
| RectInfo* first() { return reinterpret_cast<RectInfo*>(fRectData.begin()); } |
| const RectInfo* first() const { return reinterpret_cast<const RectInfo*>(fRectData.begin()); } |
| const RectInfo* next(const RectInfo* prev) const { |
| intptr_t next = |
| reinterpret_cast<intptr_t>(prev) + |
| (prev->hasLocalMatrix() ? sizeof(RectWithLocalMatrixInfo) : sizeof(RectInfo)); |
| return reinterpret_cast<const RectInfo*>(next); |
| } |
| |
| SkSTArray<4 * sizeof(RectWithLocalMatrixInfo), uint8_t, true> fRectData; |
| Helper fHelper; |
| int fRectCnt; |
| |
| typedef GrMeshDrawOp INHERITED; |
| }; |
| |
| } // anonymous namespace |
| |
| namespace GrRectOpFactory { |
| |
| std::unique_ptr<GrDrawOp> MakeAAFill(GrPaint&& paint, const SkMatrix& viewMatrix, |
| const SkRect& rect, const GrUserStencilSettings* stencil) { |
| if (!view_matrix_ok_for_aa_fill_rect(viewMatrix)) { |
| return nullptr; |
| } |
| SkRect devRect; |
| viewMatrix.mapRect(&devRect, rect); |
| return AAFillRectOp::Make(std::move(paint), viewMatrix, rect, devRect, nullptr, stencil); |
| } |
| |
| std::unique_ptr<GrDrawOp> MakeAAFillWithLocalMatrix(GrPaint&& paint, const SkMatrix& viewMatrix, |
| const SkMatrix& localMatrix, |
| const SkRect& rect) { |
| if (!view_matrix_ok_for_aa_fill_rect(viewMatrix)) { |
| return nullptr; |
| } |
| SkRect devRect; |
| viewMatrix.mapRect(&devRect, rect); |
| return AAFillRectOp::Make(std::move(paint), viewMatrix, rect, devRect, &localMatrix, nullptr); |
| } |
| |
| std::unique_ptr<GrDrawOp> MakeAAFillWithLocalRect(GrPaint&& paint, const SkMatrix& viewMatrix, |
| const SkRect& rect, const SkRect& localRect) { |
| if (!view_matrix_ok_for_aa_fill_rect(viewMatrix)) { |
| return nullptr; |
| } |
| SkRect devRect; |
| viewMatrix.mapRect(&devRect, rect); |
| SkMatrix localMatrix; |
| if (!localMatrix.setRectToRect(rect, localRect, SkMatrix::kFill_ScaleToFit)) { |
| return nullptr; |
| } |
| return AAFillRectOp::Make(std::move(paint), viewMatrix, rect, devRect, &localMatrix, nullptr); |
| } |
| |
| } // namespace GrRectOpFactory |
| |
| /////////////////////////////////////////////////////////////////////////////////////////////////// |
| |
| #if GR_TEST_UTILS |
| |
| #include "GrDrawOpTest.h" |
| |
| GR_DRAW_OP_TEST_DEFINE(AAFillRectOp) { |
| SkMatrix viewMatrix; |
| do { |
| viewMatrix = GrTest::TestMatrixInvertible(random); |
| } while (!view_matrix_ok_for_aa_fill_rect(viewMatrix)); |
| SkRect rect = GrTest::TestRect(random); |
| SkRect devRect; |
| viewMatrix.mapRect(&devRect, rect); |
| const SkMatrix* localMatrix = nullptr; |
| SkMatrix m; |
| if (random->nextBool()) { |
| m = GrTest::TestMatrix(random); |
| } |
| const GrUserStencilSettings* stencil = |
| random->nextBool() ? nullptr : GrGetRandomStencil(random, context); |
| return AAFillRectOp::Make(std::move(paint), viewMatrix, rect, devRect, localMatrix, stencil); |
| } |
| |
| #endif |