| /* |
| * Copyright 2012 Google Inc. |
| * |
| * Use of this source code is governed by a BSD-style license that can be |
| * found in the LICENSE file. |
| */ |
| |
| #include "GrAARectRenderer.h" |
| #include "GrBatch.h" |
| #include "GrBatchTarget.h" |
| #include "GrBatchTest.h" |
| #include "GrContext.h" |
| #include "GrDefaultGeoProcFactory.h" |
| #include "GrGeometryProcessor.h" |
| #include "GrInvariantOutput.h" |
| #include "GrResourceKey.h" |
| #include "GrResourceProvider.h" |
| #include "GrTestUtils.h" |
| #include "GrVertexBuffer.h" |
| #include "SkColorPriv.h" |
| #include "gl/GrGLProcessor.h" |
| #include "gl/GrGLGeometryProcessor.h" |
| #include "gl/builders/GrGLProgramBuilder.h" |
| |
| /////////////////////////////////////////////////////////////////////////////// |
| |
| static 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 GrGeometryProcessor* create_fill_rect_gp(bool tweakAlphaForCoverage, |
| const SkMatrix& localMatrix) { |
| uint32_t flags = GrDefaultGeoProcFactory::kColor_GPType; |
| const GrGeometryProcessor* gp; |
| if (tweakAlphaForCoverage) { |
| gp = GrDefaultGeoProcFactory::Create(flags, GrColor_WHITE, SkMatrix::I(), localMatrix); |
| } else { |
| flags |= GrDefaultGeoProcFactory::kCoverage_GPType; |
| gp = GrDefaultGeoProcFactory::Create(flags, GrColor_WHITE, SkMatrix::I(), localMatrix); |
| } |
| return gp; |
| } |
| |
| GR_DECLARE_STATIC_UNIQUE_KEY(gAAFillRectIndexBufferKey); |
| |
| class AAFillRectBatch : public GrBatch { |
| public: |
| struct Geometry { |
| GrColor fColor; |
| SkMatrix fViewMatrix; |
| SkRect fRect; |
| SkRect fDevRect; |
| }; |
| |
| static GrBatch* Create(const Geometry& geometry) { |
| return SkNEW_ARGS(AAFillRectBatch, (geometry)); |
| } |
| |
| const char* name() const override { return "AAFillRectBatch"; } |
| |
| void getInvariantOutputColor(GrInitInvariantOutput* out) const override { |
| // When this is called on a batch, there is only one geometry bundle |
| out->setKnownFourComponents(fGeoData[0].fColor); |
| } |
| |
| void getInvariantOutputCoverage(GrInitInvariantOutput* out) const override { |
| out->setUnknownSingleComponent(); |
| } |
| |
| void initBatchTracker(const GrPipelineInfo& init) override { |
| // Handle any color overrides |
| if (init.fColorIgnored) { |
| fGeoData[0].fColor = GrColor_ILLEGAL; |
| } else if (GrColor_ILLEGAL != init.fOverrideColor) { |
| fGeoData[0].fColor = init.fOverrideColor; |
| } |
| |
| // setup batch properties |
| fBatch.fColorIgnored = init.fColorIgnored; |
| fBatch.fColor = fGeoData[0].fColor; |
| fBatch.fUsesLocalCoords = init.fUsesLocalCoords; |
| fBatch.fCoverageIgnored = init.fCoverageIgnored; |
| fBatch.fCanTweakAlphaForCoverage = init.fCanTweakAlphaForCoverage; |
| } |
| |
| void generateGeometry(GrBatchTarget* batchTarget, const GrPipeline* pipeline) override { |
| bool canTweakAlphaForCoverage = this->canTweakAlphaForCoverage(); |
| |
| SkMatrix localMatrix; |
| if (this->usesLocalCoords() && !this->viewMatrix().invert(&localMatrix)) { |
| SkDebugf("Cannot invert\n"); |
| return; |
| } |
| |
| SkAutoTUnref<const GrGeometryProcessor> gp(create_fill_rect_gp(canTweakAlphaForCoverage, |
| localMatrix)); |
| |
| batchTarget->initDraw(gp, pipeline); |
| |
| // TODO this is hacky, but the only way we have to initialize the GP is to use the |
| // GrPipelineInfo struct so we can generate the correct shader. Once we have GrBatch |
| // everywhere we can remove this nastiness |
| GrPipelineInfo init; |
| init.fColorIgnored = fBatch.fColorIgnored; |
| init.fOverrideColor = GrColor_ILLEGAL; |
| init.fCoverageIgnored = fBatch.fCoverageIgnored; |
| init.fUsesLocalCoords = this->usesLocalCoords(); |
| gp->initBatchTracker(batchTarget->currentBatchTracker(), init); |
| |
| size_t vertexStride = gp->getVertexStride(); |
| SkASSERT(canTweakAlphaForCoverage ? |
| vertexStride == sizeof(GrDefaultGeoProcFactory::PositionColorAttr) : |
| vertexStride == sizeof(GrDefaultGeoProcFactory::PositionColorCoverageAttr)); |
| int instanceCount = fGeoData.count(); |
| |
| SkAutoTUnref<const GrIndexBuffer> indexBuffer(this->getIndexBuffer( |
| batchTarget->resourceProvider())); |
| InstancedHelper helper; |
| void* vertices = helper.init(batchTarget, kTriangles_GrPrimitiveType, vertexStride, |
| indexBuffer, kVertsPerAAFillRect, kIndicesPerAAFillRect, |
| instanceCount); |
| if (!vertices || !indexBuffer) { |
| SkDebugf("Could not allocate vertices\n"); |
| return; |
| } |
| |
| for (int i = 0; i < instanceCount; i++) { |
| const Geometry& args = fGeoData[i]; |
| this->generateAAFillRectGeometry(vertices, |
| i * kVertsPerAAFillRect * vertexStride, |
| vertexStride, |
| args.fColor, |
| args.fViewMatrix, |
| args.fRect, |
| args.fDevRect, |
| canTweakAlphaForCoverage); |
| } |
| |
| helper.issueDraw(batchTarget); |
| } |
| |
| SkSTArray<1, Geometry, true>* geoData() { return &fGeoData; } |
| |
| private: |
| AAFillRectBatch(const Geometry& geometry) { |
| this->initClassID<AAFillRectBatch>(); |
| fGeoData.push_back(geometry); |
| |
| this->setBounds(geometry.fDevRect); |
| } |
| |
| static const int kNumAAFillRectsInIndexBuffer = 256; |
| static const int kVertsPerAAFillRect = 8; |
| static const int kIndicesPerAAFillRect = 30; |
| |
| const GrIndexBuffer* getIndexBuffer(GrResourceProvider* resourceProvider) { |
| GR_DEFINE_STATIC_UNIQUE_KEY(gAAFillRectIndexBufferKey); |
| |
| 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, |
| }; |
| GR_STATIC_ASSERT(SK_ARRAY_COUNT(gFillAARectIdx) == kIndicesPerAAFillRect); |
| return resourceProvider->refOrCreateInstancedIndexBuffer(gFillAARectIdx, |
| kIndicesPerAAFillRect, kNumAAFillRectsInIndexBuffer, kVertsPerAAFillRect, |
| gAAFillRectIndexBufferKey); |
| } |
| |
| GrColor color() const { return fBatch.fColor; } |
| bool usesLocalCoords() const { return fBatch.fUsesLocalCoords; } |
| bool canTweakAlphaForCoverage() const { return fBatch.fCanTweakAlphaForCoverage; } |
| bool colorIgnored() const { return fBatch.fColorIgnored; } |
| const SkMatrix& viewMatrix() const { return fGeoData[0].fViewMatrix; } |
| |
| bool onCombineIfPossible(GrBatch* t) override { |
| AAFillRectBatch* that = t->cast<AAFillRectBatch>(); |
| |
| SkASSERT(this->usesLocalCoords() == that->usesLocalCoords()); |
| // 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 batch. We could actually upload the viewmatrix |
| // using vertex attributes in these cases, but haven't investigated that |
| if (this->usesLocalCoords() && !this->viewMatrix().cheapEqualTo(that->viewMatrix())) { |
| return false; |
| } |
| |
| if (this->color() != that->color()) { |
| fBatch.fColor = GrColor_ILLEGAL; |
| } |
| |
| // In the event of two batches, one who can tweak, one who cannot, we just fall back to |
| // not tweaking |
| if (this->canTweakAlphaForCoverage() != that->canTweakAlphaForCoverage()) { |
| fBatch.fCanTweakAlphaForCoverage = false; |
| } |
| |
| fGeoData.push_back_n(that->geoData()->count(), that->geoData()->begin()); |
| this->joinBounds(that->bounds()); |
| return true; |
| } |
| |
| void generateAAFillRectGeometry(void* vertices, |
| size_t offset, |
| size_t vertexStride, |
| GrColor color, |
| const SkMatrix& viewMatrix, |
| const SkRect& rect, |
| const SkRect& devRect, |
| bool tweakAlphaForCoverage) const { |
| intptr_t verts = reinterpret_cast<intptr_t>(vertices) + offset; |
| |
| SkPoint* fan0Pos = reinterpret_cast<SkPoint*>(verts); |
| SkPoint* fan1Pos = reinterpret_cast<SkPoint*>(verts + 4 * vertexStride); |
| |
| SkScalar inset = SkMinScalar(devRect.width(), SK_Scalar1); |
| inset = SK_ScalarHalf * SkMinScalar(inset, devRect.height()); |
| |
| if (viewMatrix.rectStaysRect()) { |
| 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] } |
| }; |
| |
| vec[0].normalize(); |
| vec[0].scale(SK_ScalarHalf); |
| vec[1].normalize(); |
| vec[1].scale(SK_ScalarHalf); |
| |
| // 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]; |
| } |
| |
| // Make verts point to vertex color and then set all the color and coverage vertex attrs |
| // values. |
| verts += 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 + sizeof(GrColor)) = 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 + |
| sizeof(GrColor)) = innerCoverage; |
| } |
| } |
| } |
| |
| struct BatchTracker { |
| GrColor fColor; |
| bool fUsesLocalCoords; |
| bool fColorIgnored; |
| bool fCoverageIgnored; |
| bool fCanTweakAlphaForCoverage; |
| }; |
| |
| BatchTracker fBatch; |
| SkSTArray<1, Geometry, true> fGeoData; |
| }; |
| |
| namespace { |
| // Should the coverage be multiplied into the color attrib or use a separate attrib. |
| enum CoverageAttribType { |
| kUseColor_CoverageAttribType, |
| kUseCoverage_CoverageAttribType, |
| }; |
| } |
| |
| void GrAARectRenderer::geometryFillAARect(GrDrawTarget* target, |
| GrPipelineBuilder* pipelineBuilder, |
| GrColor color, |
| const SkMatrix& viewMatrix, |
| const SkRect& rect, |
| const SkRect& devRect) { |
| AAFillRectBatch::Geometry geometry; |
| geometry.fRect = rect; |
| geometry.fViewMatrix = viewMatrix; |
| geometry.fDevRect = devRect; |
| geometry.fColor = color; |
| |
| |
| SkAutoTUnref<GrBatch> batch(AAFillRectBatch::Create(geometry)); |
| target->drawBatch(pipelineBuilder, batch); |
| } |
| |
| void GrAARectRenderer::strokeAARect(GrDrawTarget* target, |
| GrPipelineBuilder* pipelineBuilder, |
| GrColor color, |
| const SkMatrix& viewMatrix, |
| const SkRect& rect, |
| const SkRect& devRect, |
| const SkStrokeRec& stroke) { |
| SkVector devStrokeSize; |
| SkScalar width = stroke.getWidth(); |
| if (width > 0) { |
| devStrokeSize.set(width, width); |
| 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 = SkScalarMul(dx, SK_ScalarHalf); |
| const SkScalar ry = SkScalarMul(dy, SK_ScalarHalf); |
| |
| SkScalar spare; |
| { |
| SkScalar w = devRect.width() - dx; |
| SkScalar h = devRect.height() - dy; |
| spare = SkTMin(w, h); |
| } |
| |
| SkRect devOutside(devRect); |
| devOutside.outset(rx, ry); |
| |
| bool miterStroke = true; |
| // For hairlines, make bevel and round joins appear the same as mitered ones. |
| // small miter limit means right angles show bevel... |
| if ((width > 0) && (stroke.getJoin() != SkPaint::kMiter_Join || |
| stroke.getMiter() < SK_ScalarSqrt2)) { |
| miterStroke = false; |
| } |
| |
| if (spare <= 0 && miterStroke) { |
| this->fillAARect(target, pipelineBuilder, color, viewMatrix, devOutside, devOutside); |
| return; |
| } |
| |
| SkRect devInside(devRect); |
| devInside.inset(rx, ry); |
| |
| SkRect devOutsideAssist(devRect); |
| |
| // For bevel-stroke, use 2 SkRect instances(devOutside and devOutsideAssist) |
| // to draw the outer of the rect. 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); |
| } |
| |
| this->geometryStrokeAARect(target, pipelineBuilder, color, viewMatrix, devOutside, |
| devOutsideAssist, devInside, miterStroke); |
| } |
| |
| GR_DECLARE_STATIC_UNIQUE_KEY(gMiterIndexBufferKey); |
| GR_DECLARE_STATIC_UNIQUE_KEY(gBevelIndexBufferKey); |
| |
| class AAStrokeRectBatch : public GrBatch { |
| public: |
| // TODO support AA rotated stroke rects by copying around view matrices |
| struct Geometry { |
| GrColor fColor; |
| SkRect fDevOutside; |
| SkRect fDevOutsideAssist; |
| SkRect fDevInside; |
| bool fMiterStroke; |
| }; |
| |
| static GrBatch* Create(const Geometry& geometry, const SkMatrix& viewMatrix) { |
| return SkNEW_ARGS(AAStrokeRectBatch, (geometry, viewMatrix)); |
| } |
| |
| const char* name() const override { return "AAStrokeRect"; } |
| |
| void getInvariantOutputColor(GrInitInvariantOutput* out) const override { |
| // When this is called on a batch, there is only one geometry bundle |
| out->setKnownFourComponents(fGeoData[0].fColor); |
| } |
| |
| void getInvariantOutputCoverage(GrInitInvariantOutput* out) const override { |
| out->setUnknownSingleComponent(); |
| } |
| |
| void initBatchTracker(const GrPipelineInfo& init) override { |
| // Handle any color overrides |
| if (init.fColorIgnored) { |
| fGeoData[0].fColor = GrColor_ILLEGAL; |
| } else if (GrColor_ILLEGAL != init.fOverrideColor) { |
| fGeoData[0].fColor = init.fOverrideColor; |
| } |
| |
| // setup batch properties |
| fBatch.fColorIgnored = init.fColorIgnored; |
| fBatch.fColor = fGeoData[0].fColor; |
| fBatch.fUsesLocalCoords = init.fUsesLocalCoords; |
| fBatch.fCoverageIgnored = init.fCoverageIgnored; |
| fBatch.fMiterStroke = fGeoData[0].fMiterStroke; |
| fBatch.fCanTweakAlphaForCoverage = init.fCanTweakAlphaForCoverage; |
| } |
| |
| void generateGeometry(GrBatchTarget* batchTarget, const GrPipeline* pipeline) override { |
| bool canTweakAlphaForCoverage = this->canTweakAlphaForCoverage(); |
| |
| // Local matrix is ignored if we don't have local coords. If we have localcoords we only |
| // batch with identical view matrices |
| SkMatrix localMatrix; |
| if (this->usesLocalCoords() && !this->viewMatrix().invert(&localMatrix)) { |
| SkDebugf("Cannot invert\n"); |
| return; |
| } |
| |
| SkAutoTUnref<const GrGeometryProcessor> gp(create_fill_rect_gp(canTweakAlphaForCoverage, |
| localMatrix)); |
| |
| batchTarget->initDraw(gp, pipeline); |
| |
| // TODO this is hacky, but the only way we have to initialize the GP is to use the |
| // GrPipelineInfo struct so we can generate the correct shader. Once we have GrBatch |
| // everywhere we can remove this nastiness |
| GrPipelineInfo init; |
| init.fColorIgnored = fBatch.fColorIgnored; |
| init.fOverrideColor = GrColor_ILLEGAL; |
| init.fCoverageIgnored = fBatch.fCoverageIgnored; |
| init.fUsesLocalCoords = this->usesLocalCoords(); |
| gp->initBatchTracker(batchTarget->currentBatchTracker(), init); |
| |
| size_t vertexStride = gp->getVertexStride(); |
| |
| SkASSERT(canTweakAlphaForCoverage ? |
| vertexStride == sizeof(GrDefaultGeoProcFactory::PositionColorAttr) : |
| vertexStride == sizeof(GrDefaultGeoProcFactory::PositionColorCoverageAttr)); |
| int innerVertexNum = 4; |
| int outerVertexNum = this->miterStroke() ? 4 : 8; |
| int verticesPerInstance = (outerVertexNum + innerVertexNum) * 2; |
| int indicesPerInstance = this->miterStroke() ? kMiterIndexCnt : kBevelIndexCnt; |
| int instanceCount = fGeoData.count(); |
| |
| const SkAutoTUnref<const GrIndexBuffer> indexBuffer( |
| GetIndexBuffer(batchTarget->resourceProvider(), this->miterStroke())); |
| InstancedHelper helper; |
| void* vertices = helper.init(batchTarget, kTriangles_GrPrimitiveType, vertexStride, |
| indexBuffer, verticesPerInstance, indicesPerInstance, |
| instanceCount); |
| if (!vertices || !indexBuffer) { |
| SkDebugf("Could not allocate vertices\n"); |
| return; |
| } |
| |
| for (int i = 0; i < instanceCount; i++) { |
| const Geometry& args = fGeoData[i]; |
| this->generateAAStrokeRectGeometry(vertices, |
| i * verticesPerInstance * vertexStride, |
| vertexStride, |
| outerVertexNum, |
| innerVertexNum, |
| args.fColor, |
| args.fDevOutside, |
| args.fDevOutsideAssist, |
| args.fDevInside, |
| args.fMiterStroke, |
| canTweakAlphaForCoverage); |
| } |
| helper.issueDraw(batchTarget); |
| } |
| |
| SkSTArray<1, Geometry, true>* geoData() { return &fGeoData; } |
| |
| private: |
| AAStrokeRectBatch(const Geometry& geometry, const SkMatrix& viewMatrix) { |
| this->initClassID<AAStrokeRectBatch>(); |
| fBatch.fViewMatrix = viewMatrix; |
| fGeoData.push_back(geometry); |
| |
| // If we have miterstroke then we inset devOutside and outset devOutsideAssist, so we need |
| // the join for proper bounds |
| fBounds = geometry.fDevOutside; |
| fBounds.join(geometry.fDevOutsideAssist); |
| } |
| |
| |
| 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 const GrIndexBuffer* GetIndexBuffer(GrResourceProvider* resourceProvider, |
| bool miterStroke) { |
| |
| if (miterStroke) { |
| 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, |
| }; |
| GR_STATIC_ASSERT(SK_ARRAY_COUNT(gMiterIndices) == kMiterIndexCnt); |
| GR_DEFINE_STATIC_UNIQUE_KEY(gMiterIndexBufferKey); |
| return resourceProvider->refOrCreateInstancedIndexBuffer(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 |
| */ |
| 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, |
| }; |
| GR_STATIC_ASSERT(SK_ARRAY_COUNT(gBevelIndices) == kBevelIndexCnt); |
| |
| GR_DEFINE_STATIC_UNIQUE_KEY(gBevelIndexBufferKey); |
| return resourceProvider->refOrCreateInstancedIndexBuffer(gBevelIndices, |
| kBevelIndexCnt, kNumBevelRectsInIndexBuffer, kBevelVertexCnt, |
| gBevelIndexBufferKey); |
| } |
| } |
| |
| GrColor color() const { return fBatch.fColor; } |
| bool usesLocalCoords() const { return fBatch.fUsesLocalCoords; } |
| bool canTweakAlphaForCoverage() const { return fBatch.fCanTweakAlphaForCoverage; } |
| bool colorIgnored() const { return fBatch.fColorIgnored; } |
| const SkMatrix& viewMatrix() const { return fBatch.fViewMatrix; } |
| bool miterStroke() const { return fBatch.fMiterStroke; } |
| |
| bool onCombineIfPossible(GrBatch* t) override { |
| AAStrokeRectBatch* that = t->cast<AAStrokeRectBatch>(); |
| |
| // TODO batch 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 batch. We could actually upload the viewmatrix |
| // using vertex attributes in these cases, but haven't investigated that |
| if (this->usesLocalCoords() && !this->viewMatrix().cheapEqualTo(that->viewMatrix())) { |
| return false; |
| } |
| |
| // In the event of two batches, one who can tweak, one who cannot, we just fall back to |
| // not tweaking |
| if (this->canTweakAlphaForCoverage() != that->canTweakAlphaForCoverage()) { |
| fBatch.fCanTweakAlphaForCoverage = false; |
| } |
| |
| if (this->color() != that->color()) { |
| fBatch.fColor = GrColor_ILLEGAL; |
| } |
| fGeoData.push_back_n(that->geoData()->count(), that->geoData()->begin()); |
| this->joinBounds(that->bounds()); |
| return true; |
| } |
| |
| 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 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 = 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 |
| SkScalar inset = SK_ScalarHalf; |
| #endif |
| |
| if (miterStroke) { |
| // outermost |
| set_inset_fan(fan0Pos, vertexStride, devOutside, -SK_ScalarHalf, -SK_ScalarHalf); |
| // inner two |
| set_inset_fan(fan1Pos, vertexStride, devOutside, inset, inset); |
| set_inset_fan(fan2Pos, vertexStride, devInside, -inset, -inset); |
| // innermost |
| set_inset_fan(fan3Pos, vertexStride, devInside, SK_ScalarHalf, SK_ScalarHalf); |
| } 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); |
| // 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); |
| } |
| |
| // 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; |
| if (inset < SK_ScalarHalf) { |
| scale = SkScalarFloorToInt(512.0f * inset / (inset + SK_ScalarHalf)); |
| SkASSERT(scale >= 0 && scale <= 255); |
| } else { |
| scale = 0xff; |
| } |
| |
| 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 |
| verts += (outerVertexNum + innerVertexNum) * vertexStride; |
| for (int i = 0; i < innerVertexNum; ++i) { |
| if (tweakAlphaForCoverage) { |
| *reinterpret_cast<GrColor*>(verts + i * vertexStride) = 0; |
| } else { |
| *reinterpret_cast<GrColor*>(verts + i * vertexStride) = color; |
| *reinterpret_cast<GrColor*>(verts + i * vertexStride + sizeof(GrColor)) = 0; |
| } |
| } |
| } |
| |
| struct BatchTracker { |
| SkMatrix fViewMatrix; |
| GrColor fColor; |
| bool fUsesLocalCoords; |
| bool fColorIgnored; |
| bool fCoverageIgnored; |
| bool fMiterStroke; |
| bool fCanTweakAlphaForCoverage; |
| }; |
| |
| BatchTracker fBatch; |
| SkSTArray<1, Geometry, true> fGeoData; |
| }; |
| |
| void GrAARectRenderer::geometryStrokeAARect(GrDrawTarget* target, |
| GrPipelineBuilder* pipelineBuilder, |
| GrColor color, |
| const SkMatrix& viewMatrix, |
| const SkRect& devOutside, |
| const SkRect& devOutsideAssist, |
| const SkRect& devInside, |
| bool miterStroke) { |
| AAStrokeRectBatch::Geometry geometry; |
| geometry.fColor = color; |
| geometry.fDevOutside = devOutside; |
| geometry.fDevOutsideAssist = devOutsideAssist; |
| geometry.fDevInside = devInside; |
| geometry.fMiterStroke = miterStroke; |
| |
| SkAutoTUnref<GrBatch> batch(AAStrokeRectBatch::Create(geometry, viewMatrix)); |
| target->drawBatch(pipelineBuilder, batch); |
| } |
| |
| void GrAARectRenderer::fillAANestedRects(GrDrawTarget* target, |
| GrPipelineBuilder* pipelineBuilder, |
| GrColor color, |
| const SkMatrix& viewMatrix, |
| const SkRect rects[2]) { |
| SkASSERT(viewMatrix.rectStaysRect()); |
| SkASSERT(!rects[1].isEmpty()); |
| |
| SkRect devOutside, devInside; |
| viewMatrix.mapRect(&devOutside, rects[0]); |
| // can't call mapRect for devInside since it calls sort |
| viewMatrix.mapPoints((SkPoint*)&devInside, (const SkPoint*)&rects[1], 2); |
| |
| if (devInside.isEmpty()) { |
| this->fillAARect(target, pipelineBuilder, color, viewMatrix, devOutside, devOutside); |
| return; |
| } |
| |
| this->geometryStrokeAARect(target, pipelineBuilder, color, viewMatrix, devOutside, |
| devOutside, devInside, true); |
| } |
| |
| /////////////////////////////////////////////////////////////////////////////////////////////////// |
| |
| #ifdef GR_TEST_UTILS |
| |
| BATCH_TEST_DEFINE(AAFillRectBatch) { |
| AAFillRectBatch::Geometry geo; |
| geo.fColor = GrRandomColor(random); |
| geo.fViewMatrix = GrTest::TestMatrix(random); |
| geo.fRect = GrTest::TestRect(random); |
| geo.fDevRect = GrTest::TestRect(random); |
| return AAFillRectBatch::Create(geo); |
| } |
| |
| BATCH_TEST_DEFINE(AAStrokeRectBatch) { |
| bool miterStroke = random->nextBool(); |
| |
| // Create mock stroke rect |
| SkRect outside = GrTest::TestRect(random); |
| SkScalar minDim = SkMinScalar(outside.width(), outside.height()); |
| SkScalar strokeWidth = minDim * 0.1f; |
| SkRect outsideAssist = outside; |
| outsideAssist.outset(strokeWidth, strokeWidth); |
| SkRect inside = outside; |
| inside.inset(strokeWidth, strokeWidth); |
| |
| AAStrokeRectBatch::Geometry geo; |
| geo.fColor = GrRandomColor(random); |
| geo.fDevOutside = outside; |
| geo.fDevOutsideAssist = outsideAssist; |
| geo.fDevInside = inside; |
| geo.fMiterStroke = miterStroke; |
| |
| return AAStrokeRectBatch::Create(geo, GrTest::TestMatrix(random)); |
| } |
| |
| #endif |
