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 GrTestBatch_DEFINED 9 #define GrTestBatch_DEFINED 10 11 #include "GrBatch.h" 12 #include "GrVertexBuffer.h" 13 14 /* 15 * A simple batch only for testing purposes which actually doesn't batch at all, but can fit into 16 * the batch pipeline and generate arbitrary geometry 17 */ 18 class GrTestBatch : public GrBatch { 19 public: 20 struct Geometry { 21 GrColor fColor; 22 }; 23 24 virtual const char* name() const override = 0; 25 26 void getInvariantOutputColor(GrInitInvariantOutput* out) const override { 27 // When this is called on a batch, there is only one geometry bundle 28 out->setKnownFourComponents(this->geoData(0)->fColor); 29 } 30 31 void getInvariantOutputCoverage(GrInitInvariantOutput* out) const override { 32 out->setUnknownSingleComponent(); 33 } 34 35 void initBatchTracker(const GrPipelineInfo& init) override { 36 // Handle any color overrides 37 if (init.fColorIgnored) { 38 this->geoData(0)->fColor = GrColor_ILLEGAL; 39 } else if (GrColor_ILLEGAL != init.fOverrideColor) { 40 this->geoData(0)->fColor = init.fOverrideColor; 41 } 42 43 // setup batch properties 44 fBatch.fColorIgnored = init.fColorIgnored; 45 fBatch.fColor = this->geoData(0)->fColor; 46 fBatch.fUsesLocalCoords = init.fUsesLocalCoords; 47 fBatch.fCoverageIgnored = init.fCoverageIgnored; 48 } 49 50 void generateGeometry(GrBatchTarget* batchTarget, const GrPipeline* pipeline) override { 51 batchTarget->initDraw(fGeometryProcessor, pipeline); 52 53 // TODO this is hacky, but the only way we have to initialize the GP is to use the 54 // GrPipelineInfo struct so we can generate the correct shader. Once we have GrBatch 55 // everywhere we can remove this nastiness 56 GrPipelineInfo init; 57 init.fColorIgnored = fBatch.fColorIgnored; 58 init.fOverrideColor = GrColor_ILLEGAL; 59 init.fCoverageIgnored = fBatch.fCoverageIgnored; 60 init.fUsesLocalCoords = fBatch.fUsesLocalCoords; 61 fGeometryProcessor->initBatchTracker(batchTarget->currentBatchTracker(), init); 62 63 this->onGenerateGeometry(batchTarget, pipeline); 64 } 65 66 protected: 67 GrTestBatch(const GrGeometryProcessor* gp, const SkRect& bounds) { 68 fGeometryProcessor.reset(SkRef(gp)); 69 70 this->setBounds(bounds); 71 } 72 73 const GrGeometryProcessor* geometryProcessor() const { return fGeometryProcessor; } 74 75 private: 76 virtual Geometry* geoData(int index) = 0; 77 virtual const Geometry* geoData(int index) const = 0; 78 79 bool onCombineIfPossible(GrBatch* t) override { 80 return false; 81 } 82 83 virtual void onGenerateGeometry(GrBatchTarget* batchTarget, const GrPipeline* pipeline) = 0; 84 85 struct BatchTracker { 86 GrColor fColor; 87 bool fUsesLocalCoords; 88 bool fColorIgnored; 89 bool fCoverageIgnored; 90 }; 91 92 SkAutoTUnref<const GrGeometryProcessor> fGeometryProcessor; 93 BatchTracker fBatch; 94 }; 95 96 #endif 97