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| 1 /* |
| 2 * Copyright 2015 Google Inc. |
| 3 * |
| 4 * Use of this source code is governed by a BSD-style license that can be |
| 5 * found in the LICENSE file. |
| 6 */ |
| 7 |
| 8 #ifndef GrAAStrokeRectBatch_DEFINED |
| 9 #define GrAAStrokeRectBatch_DEFINED |
| 10 |
| 11 #include "GrBatch.h" |
| 12 #include "GrColor.h" |
| 13 #include "GrTypes.h" |
| 14 #include "SkMatrix.h" |
| 15 #include "SkRect.h" |
| 16 |
| 17 class GrAAStrokeRectBatch : public GrBatch { |
| 18 public: |
| 19 // TODO support AA rotated stroke rects by copying around view matrices |
| 20 struct Geometry { |
| 21 GrColor fColor; |
| 22 SkRect fDevOutside; |
| 23 SkRect fDevOutsideAssist; |
| 24 SkRect fDevInside; |
| 25 bool fMiterStroke; |
| 26 }; |
| 27 |
| 28 static GrBatch* Create(const Geometry& geometry, const SkMatrix& viewMatrix)
{ |
| 29 return SkNEW_ARGS(GrAAStrokeRectBatch, (geometry, viewMatrix)); |
| 30 } |
| 31 |
| 32 const char* name() const override { return "AAStrokeRect"; } |
| 33 |
| 34 void getInvariantOutputColor(GrInitInvariantOutput* out) const override { |
| 35 // When this is called on a batch, there is only one geometry bundle |
| 36 out->setKnownFourComponents(fGeoData[0].fColor); |
| 37 } |
| 38 |
| 39 void getInvariantOutputCoverage(GrInitInvariantOutput* out) const override { |
| 40 out->setUnknownSingleComponent(); |
| 41 } |
| 42 |
| 43 void initBatchTracker(const GrPipelineInfo& init) override; |
| 44 |
| 45 void generateGeometry(GrBatchTarget* batchTarget) override; |
| 46 |
| 47 SkSTArray<1, Geometry, true>* geoData() { return &fGeoData; } |
| 48 |
| 49 private: |
| 50 GrAAStrokeRectBatch(const Geometry& geometry, const SkMatrix& viewMatrix) { |
| 51 this->initClassID<GrAAStrokeRectBatch>(); |
| 52 fBatch.fViewMatrix = viewMatrix; |
| 53 fGeoData.push_back(geometry); |
| 54 |
| 55 // If we have miterstroke then we inset devOutside and outset devOutside
Assist, so we need |
| 56 // the join for proper bounds |
| 57 fBounds = geometry.fDevOutside; |
| 58 fBounds.join(geometry.fDevOutsideAssist); |
| 59 } |
| 60 |
| 61 |
| 62 static const int kMiterIndexCnt = 3 * 24; |
| 63 static const int kMiterVertexCnt = 16; |
| 64 static const int kNumMiterRectsInIndexBuffer = 256; |
| 65 |
| 66 static const int kBevelIndexCnt = 48 + 36 + 24; |
| 67 static const int kBevelVertexCnt = 24; |
| 68 static const int kNumBevelRectsInIndexBuffer = 256; |
| 69 |
| 70 static const GrIndexBuffer* GetIndexBuffer(GrResourceProvider* resourceProvi
der, |
| 71 bool miterStroke); |
| 72 |
| 73 GrColor color() const { return fBatch.fColor; } |
| 74 bool usesLocalCoords() const { return fBatch.fUsesLocalCoords; } |
| 75 bool canTweakAlphaForCoverage() const { return fBatch.fCanTweakAlphaForCover
age; } |
| 76 bool colorIgnored() const { return fBatch.fColorIgnored; } |
| 77 const SkMatrix& viewMatrix() const { return fBatch.fViewMatrix; } |
| 78 bool miterStroke() const { return fBatch.fMiterStroke; } |
| 79 bool coverageIgnored() const { return fBatch.fCoverageIgnored; } |
| 80 |
| 81 bool onCombineIfPossible(GrBatch* t) override; |
| 82 |
| 83 void generateAAStrokeRectGeometry(void* vertices, |
| 84 size_t offset, |
| 85 size_t vertexStride, |
| 86 int outerVertexNum, |
| 87 int innerVertexNum, |
| 88 GrColor color, |
| 89 const SkRect& devOutside, |
| 90 const SkRect& devOutsideAssist, |
| 91 const SkRect& devInside, |
| 92 bool miterStroke, |
| 93 bool tweakAlphaForCoverage) const; |
| 94 |
| 95 struct BatchTracker { |
| 96 SkMatrix fViewMatrix; |
| 97 GrColor fColor; |
| 98 bool fUsesLocalCoords; |
| 99 bool fColorIgnored; |
| 100 bool fCoverageIgnored; |
| 101 bool fMiterStroke; |
| 102 bool fCanTweakAlphaForCoverage; |
| 103 }; |
| 104 |
| 105 BatchTracker fBatch; |
| 106 SkSTArray<1, Geometry, true> fGeoData; |
| 107 }; |
| 108 |
| 109 |
| 110 #endif |
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