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/*
* Copyright 2015 Google Inc.
*
* Use of this source code is governed by a BSD-style license that can be
* found in the LICENSE file.
*/
#ifndef GrTestBatch_DEFINED
#define GrTestBatch_DEFINED
#include "GrBatch.h"
/*
* A simple batch only for testing purposes which actually doesn't batch at all, but can fit into
* the batch pipeline and generate arbitrary geometry
*/
class GrTestBatch : public GrBatch {
public:
struct Geometry {
GrColor fColor;
};
virtual const char* name() const SK_OVERRIDE = 0;
void getInvariantOutputColor(GrInitInvariantOutput* out) const SK_OVERRIDE {
// When this is called on a batch, there is only one geometry bundle
if (fGeometryProcessor->hasVertexColor()) {
out->setUnknownFourComponents();
} else {
out->setKnownFourComponents(fGeometryProcessor->color());
}
}
void getInvariantOutputCoverage(GrInitInvariantOutput* out) const SK_OVERRIDE {
out->setUnknownSingleComponent();
}
void initBatchTracker(const GrPipelineInfo& init) SK_OVERRIDE {
// Handle any color overrides
if (init.fColorIgnored) {
this->geoData(0)->fColor = GrColor_ILLEGAL;
} else if (GrColor_ILLEGAL != init.fOverrideColor) {
this->geoData(0)->fColor = init.fOverrideColor;
}
// setup batch properties
fBatch.fColorIgnored = init.fColorIgnored;
fBatch.fColor = this->geoData(0)->fColor;
fBatch.fUsesLocalCoords = init.fUsesLocalCoords;
fBatch.fCoverageIgnored = init.fCoverageIgnored;
}
void generateGeometry(GrBatchTarget* batchTarget, const GrPipeline* pipeline) SK_OVERRIDE {
batchTarget->initDraw(fGeometryProcessor, 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 = fBatch.fUsesLocalCoords;
fGeometryProcessor->initBatchTracker(batchTarget->currentBatchTracker(), init);
this->onGenerateGeometry(batchTarget, pipeline);
}
protected:
GrTestBatch(const GrGeometryProcessor* gp) {
fGeometryProcessor.reset(SkRef(gp));
}
const GrGeometryProcessor* geometryProcessor() const { return fGeometryProcessor; }
private:
virtual Geometry* geoData(int index) = 0;
bool onCombineIfPossible(GrBatch* t) SK_OVERRIDE {
return false;
}
virtual void onGenerateGeometry(GrBatchTarget* batchTarget, const GrPipeline* pipeline) = 0;
struct BatchTracker {
GrColor fColor;
bool fUsesLocalCoords;
bool fColorIgnored;
bool fCoverageIgnored;
};
SkAutoTUnref<const GrGeometryProcessor> fGeometryProcessor;
BatchTracker fBatch;
};
#endif
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