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/*
* Copyright 2016 Google Inc.
*
* Use of this source code is governed by a BSD-style license that can be
* found in the LICENSE file.
*/
#include "InstancedRendering.h"
#include "InstancedOp.h"
#include "GrAppliedClip.h"
#include "GrCaps.h"
#include "GrPipeline.h"
#include "GrResourceProvider.h"
#include "instanced/InstanceProcessor.h"
namespace gr_instanced {
InstancedRendering::InstancedRendering(GrGpu* gpu)
: fGpu(SkRef(gpu))
SkDEBUGCODE(, fState(State::kRecordingDraws)) {
}
void InstancedRendering::beginFlush(GrResourceProvider* rp) {
#ifdef SK_DEBUG
SkASSERT(State::kRecordingDraws == fState);
fState = State::kFlushing;
#endif
if (fTrackedOps.isEmpty()) {
return;
}
if (!fVertexBuffer) {
fVertexBuffer.reset(InstanceProcessor::FindOrCreateVertexBuffer(fGpu.get()));
if (!fVertexBuffer) {
return;
}
}
if (!fIndexBuffer) {
fIndexBuffer.reset(InstanceProcessor::FindOrCreateIndex8Buffer(fGpu.get()));
if (!fIndexBuffer) {
return;
}
}
if (!fParams.empty()) {
fParamsBuffer.reset(rp->createBuffer(fParams.count() * sizeof(ParamsTexel),
kTexel_GrBufferType, kDynamic_GrAccessPattern,
GrResourceProvider::kNoPendingIO_Flag |
GrResourceProvider::kRequireGpuMemory_Flag,
fParams.begin()));
if (!fParamsBuffer) {
return;
}
}
this->onBeginFlush(rp);
}
void InstancedRendering::draw(const GrPipeline& pipeline,
OpInfo info,
const InstancedOp* baseOp) {
InstanceProcessor instProc(info, fParamsBuffer.get());
this->onDraw(pipeline, instProc, baseOp);
}
void InstancedRendering::endFlush() {
// The caller is expected to delete all tracked ops (i.e. ops whose applyPipelineOptimizations
// method has been called) before ending the flush.
SkASSERT(fTrackedOps.isEmpty());
fParams.reset();
fParamsBuffer.reset();
this->onEndFlush();
SkDEBUGCODE(fState = State::kRecordingDraws;)
// Hold on to the shape coords and index buffers.
}
void InstancedRendering::resetGpuResources(ResetType resetType) {
fVertexBuffer.reset();
fIndexBuffer.reset();
fParamsBuffer.reset();
this->onResetGpuResources(resetType);
}
int InstancedRendering::addOpParams(InstancedOp* op) {
if (op->fParams.empty()) {
return 0;
}
SkASSERT(fParams.count() < (int)kParamsIdx_InfoMask); // TODO: cleaner.
int count = fParams.count();
fParams.push_back_n(op->fParams.count(), op->fParams.begin());
return count;
}
}
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