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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 GrBatchBuffer_DEFINED
#define GrBatchBuffer_DEFINED
#include "GrPendingProgramElement.h"
#include "GrPipeline.h"
#include "GrGpu.h"
#include "GrTRecorder.h"
/*
* GrBatch instances use this object to allocate space for their geometry and to issue the draws
* that render their batch.
*/
class GrIndexBufferAllocPool;
class GrVertexBufferAllocPool;
class GrBatchTarget : public SkNoncopyable {
public:
GrBatchTarget(GrGpu* gpu,
GrVertexBufferAllocPool* vpool,
GrIndexBufferAllocPool* ipool)
: fGpu(gpu)
, fVertexPool(vpool)
, fIndexPool(ipool)
, fFlushBuffer(kFlushBufferInitialSizeInBytes)
, fIter(fFlushBuffer)
, fNumberOfDraws(0) {}
typedef GrDrawTarget::DrawInfo DrawInfo;
void initDraw(const GrPrimitiveProcessor* primProc, const GrPipeline* pipeline) {
GrNEW_APPEND_TO_RECORDER(fFlushBuffer, BufferedFlush, (primProc, pipeline));
fNumberOfDraws++;
}
void draw(const GrDrawTarget::DrawInfo& draw) {
fFlushBuffer.back().fDraws.push_back(draw);
}
// TODO this is temporary until batch is everywhere
//void flush();
void resetNumberOfDraws() { fNumberOfDraws = 0; }
int numberOfDraws() const { return fNumberOfDraws; }
void preFlush() { fIter = FlushBuffer::Iter(fFlushBuffer); }
void flushNext(int n) {
for (; n > 0; n--) {
SkDEBUGCODE(bool verify =) fIter.next();
SkASSERT(verify);
GrProgramDesc desc;
BufferedFlush* bf = fIter.get();
const GrPipeline* pipeline = bf->fPipeline;
const GrPrimitiveProcessor* primProc = bf->fPrimitiveProcessor.get();
fGpu->buildProgramDesc(&desc, *primProc, *pipeline, bf->fBatchTracker);
GrGpu::DrawArgs args(primProc, pipeline, &desc, &bf->fBatchTracker);
int drawCount = bf->fDraws.count();
const SkSTArray<1, DrawInfo, true>& draws = bf->fDraws;
for (int i = 0; i < drawCount; i++) {
fGpu->draw(args, draws[i]);
}
}
}
void postFlush() { SkASSERT(!fIter.next()); fFlushBuffer.reset(); }
// TODO This goes away when everything uses batch
GrBatchTracker* currentBatchTracker() {
SkASSERT(!fFlushBuffer.empty());
return &fFlushBuffer.back().fBatchTracker;
}
const GrDrawTargetCaps& caps() const { return *fGpu->caps(); }
GrVertexBufferAllocPool* vertexPool() { return fVertexPool; }
GrIndexBufferAllocPool* indexPool() { return fIndexPool; }
private:
GrGpu* fGpu;
GrVertexBufferAllocPool* fVertexPool;
GrIndexBufferAllocPool* fIndexPool;
typedef void* TBufferAlign; // This wouldn't be enough align if a command used long double.
struct BufferedFlush {
BufferedFlush(const GrPrimitiveProcessor* primProc, const GrPipeline* pipeline)
: fPrimitiveProcessor(primProc)
, fPipeline(pipeline) {}
typedef GrPendingProgramElement<const GrPrimitiveProcessor> ProgramPrimitiveProcessor;
ProgramPrimitiveProcessor fPrimitiveProcessor;
const GrPipeline* fPipeline;
GrBatchTracker fBatchTracker;
SkSTArray<1, DrawInfo, true> fDraws;
};
enum {
kFlushBufferInitialSizeInBytes = 8 * sizeof(BufferedFlush),
};
typedef GrTRecorder<BufferedFlush, TBufferAlign> FlushBuffer;
FlushBuffer fFlushBuffer;
// TODO this is temporary
FlushBuffer::Iter fIter;
int fNumberOfDraws;
};
#endif
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