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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.
*/
#include "GrBatch.h"
#include "GrBatchTarget.h"
#include "GrResourceProvider.h"
#include "GrMemoryPool.h"
#include "SkSpinlock.h"
// TODO I noticed a small benefit to using a larger exclusive pool for batches. Its very small,
// but seems to be mostly consistent. There is a lot in flux right now, but we should really
// revisit this when batch is everywhere
// We use a global pool protected by a mutex(spinlock). Chrome may use the same GrContext on
// different threads. The GrContext is not used concurrently on different threads and there is a
// memory barrier between accesses of a context on different threads. Also, there may be multiple
// GrContexts and those contexts may be in use concurrently on different threads.
namespace {
SK_DECLARE_STATIC_SPINLOCK(gBatchSpinlock);
class MemoryPoolAccessor {
public:
MemoryPoolAccessor() { gBatchSpinlock.acquire(); }
~MemoryPoolAccessor() { gBatchSpinlock.release(); }
GrMemoryPool* pool() const {
static GrMemoryPool gPool(16384, 16384);
return &gPool;
}
};
}
int32_t GrBatch::gCurrBatchClassID = GrBatch::kIllegalBatchClassID;
void* GrBatch::operator new(size_t size) {
return MemoryPoolAccessor().pool()->allocate(size);
}
void GrBatch::operator delete(void* target) {
return MemoryPoolAccessor().pool()->release(target);
}
void* GrBatch::InstancedHelper::init(GrBatchTarget* batchTarget, GrPrimitiveType primType,
size_t vertexStride, const GrIndexBuffer* indexBuffer,
int verticesPerInstance, int indicesPerInstance,
int instancesToDraw) {
SkASSERT(!fInstancesRemaining);
SkASSERT(batchTarget);
if (!indexBuffer) {
return NULL;
}
const GrVertexBuffer* vertexBuffer;
int firstVertex;
int vertexCount = verticesPerInstance * instancesToDraw;
void* vertices = batchTarget->vertexPool()->makeSpace(vertexStride, vertexCount, &vertexBuffer,
&firstVertex);
if (!vertices) {
SkDebugf("Vertices could not be allocated for instanced rendering.");
return NULL;
}
SkASSERT(vertexBuffer);
fInstancesRemaining = instancesToDraw;
size_t ibSize = indexBuffer->gpuMemorySize();
fMaxInstancesPerDraw = static_cast<int>(ibSize / (sizeof(uint16_t) * indicesPerInstance));
fVertices.initInstanced(primType, vertexBuffer, indexBuffer,
firstVertex, verticesPerInstance, indicesPerInstance, &fInstancesRemaining,
fMaxInstancesPerDraw);
SkASSERT(fMaxInstancesPerDraw > 0);
return vertices;
}
void* GrBatch::QuadHelper::init(GrBatchTarget* batchTarget, size_t vertexStride, int quadsToDraw) {
SkAutoTUnref<const GrIndexBuffer> quadIndexBuffer(
batchTarget->resourceProvider()->refQuadIndexBuffer());
if (!quadIndexBuffer) {
SkDebugf("Could not get quad index buffer.");
return NULL;
}
return this->INHERITED::init(batchTarget, kTriangles_GrPrimitiveType, vertexStride,
quadIndexBuffer, kVerticesPerQuad, kIndicesPerQuad, quadsToDraw);
}
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