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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 "GrBatchAtlas.h"
#include "GrBufferAllocPool.h"
#include "GrContext.h"
#include "GrPendingProgramElement.h"
#include "GrPipeline.h"
#include "GrTRecorder.h"
#include "GrVertices.h"
/*
* GrBatch instances use this object to allocate space for their geometry and to issue the draws
* that render their batch.
*/
class GrBatchTarget : public SkNoncopyable {
public:
typedef GrBatchAtlas::BatchToken BatchToken;
GrBatchTarget(GrGpu* gpu);
void initDraw(const GrPrimitiveProcessor* primProc, const GrPipeline* pipeline) {
GrNEW_APPEND_TO_RECORDER(fFlushBuffer, BufferedFlush, (primProc, pipeline));
fNumberOfDraws++;
fCurrentToken++;
}
class TextureUploader {
public:
TextureUploader(GrGpu* gpu) : fGpu(gpu) { SkASSERT(gpu); }
/**
* Updates the pixels in a rectangle of a texture.
*
* @param left left edge of the rectangle to write (inclusive)
* @param top top edge of the rectangle to write (inclusive)
* @param width width of rectangle to write in pixels.
* @param height height of rectangle to write in pixels.
* @param config the pixel config of the source buffer
* @param buffer memory to read pixels from
* @param rowBytes number of bytes between consecutive rows. Zero
* means rows are tightly packed.
*/
bool writeTexturePixels(GrTexture* texture,
int left, int top, int width, int height,
GrPixelConfig config, const void* buffer,
size_t rowBytes) {
return fGpu->writeTexturePixels(texture, left, top, width, height, config, buffer,
rowBytes);
}
private:
GrGpu* fGpu;
};
class Uploader : public SkRefCnt {
public:
Uploader(BatchToken lastUploadToken) : fLastUploadToken(lastUploadToken) {}
BatchToken lastUploadToken() const { return fLastUploadToken; }
virtual void upload(TextureUploader)=0;
private:
BatchToken fLastUploadToken;
};
void upload(Uploader* upload) {
if (this->asapToken() == upload->lastUploadToken()) {
fAsapUploads.push_back().reset(SkRef(upload));
} else {
fInlineUploads.push_back().reset(SkRef(upload));
}
}
void draw(const GrVertices& vertices) {
fFlushBuffer.back().fVertexDraws.push_back(vertices);
}
bool isIssued(BatchToken token) const { return fLastFlushedToken >= token; }
BatchToken currentToken() const { return fCurrentToken; }
BatchToken asapToken() const { return fLastFlushedToken + 1; }
// TODO much of this complexity goes away when batch is everywhere
void resetNumberOfDraws() { fNumberOfDraws = 0; }
int numberOfDraws() const { return fNumberOfDraws; }
void preFlush() {
this->unmapVertexAndIndexBuffers();
int updateCount = fAsapUploads.count();
for (int i = 0; i < updateCount; i++) {
fAsapUploads[i]->upload(TextureUploader(fGpu));
}
fInlineUpdatesIndex = 0;
fIter = FlushBuffer::Iter(fFlushBuffer);
}
void flushNext(int n);
void postFlush() {
SkASSERT(!fIter.next());
fFlushBuffer.reset();
fAsapUploads.reset();
fInlineUploads.reset();
}
const GrCaps& caps() const { return *fGpu->caps(); }
GrResourceProvider* resourceProvider() const { return fGpu->getContext()->resourceProvider(); }
void* makeVertSpace(size_t vertexSize, int vertexCount,
const GrVertexBuffer** buffer, int* startVertex);
uint16_t* makeIndexSpace(int indexCount,
const GrIndexBuffer** buffer, int* startIndex);
// A helper for draws which overallocate and then return data to the pool
void putBackIndices(size_t indices) { fIndexPool->putBack(indices * sizeof(uint16_t)); }
void putBackVertices(size_t vertices, size_t vertexStride) {
fVertexPool->putBack(vertices * vertexStride);
}
void reset() {
fVertexPool->reset();
fIndexPool->reset();
}
private:
void unmapVertexAndIndexBuffers() {
fVertexPool->unmap();
fIndexPool->unmap();
}
GrGpu* fGpu;
SkAutoTDelete<GrVertexBufferAllocPool> fVertexPool;
SkAutoTDelete<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, GrVertices, true> fVertexDraws;
};
enum {
kFlushBufferInitialSizeInBytes = 8 * sizeof(BufferedFlush),
};
typedef GrTRecorder<BufferedFlush, TBufferAlign> FlushBuffer;
FlushBuffer fFlushBuffer;
// TODO this is temporary
FlushBuffer::Iter fIter;
int fNumberOfDraws;
BatchToken fCurrentToken;
BatchToken fLastFlushedToken; // The next token to be flushed
SkTArray<SkAutoTUnref<Uploader>, true> fAsapUploads;
SkTArray<SkAutoTUnref<Uploader>, true> fInlineUploads;
int fInlineUpdatesIndex;
};
#endif
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