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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 "GrMeshDrawOp.h"
#include "GrOpFlushState.h"
#include "GrResourceProvider.h"
GrMeshDrawOp::GrMeshDrawOp(uint32_t classID)
: INHERITED(classID), fBaseDrawToken(GrDrawOpUploadToken::AlreadyFlushedToken()) {}
void GrMeshDrawOp::onPrepare(GrOpFlushState* state) {
Target target(state, this);
this->onPrepareDraws(&target);
}
void* GrMeshDrawOp::PatternHelper::init(Target* target, GrPrimitiveType primType,
size_t vertexStride, const GrBuffer* indexBuffer,
int verticesPerRepetition, int indicesPerRepetition,
int repeatCount) {
SkASSERT(target);
if (!indexBuffer) {
return nullptr;
}
const GrBuffer* vertexBuffer;
int firstVertex;
int vertexCount = verticesPerRepetition * repeatCount;
void* vertices =
target->makeVertexSpace(vertexStride, vertexCount, &vertexBuffer, &firstVertex);
if (!vertices) {
SkDebugf("Vertices could not be allocated for instanced rendering.");
return nullptr;
}
SkASSERT(vertexBuffer);
size_t ibSize = indexBuffer->gpuMemorySize();
int maxRepetitions = static_cast<int>(ibSize / (sizeof(uint16_t) * indicesPerRepetition));
fMesh.fPrimitiveType = primType;
fMesh.fIndexBuffer.reset(indexBuffer);
fMesh.fIndexCount = indicesPerRepetition;
fMesh.fBaseIndex = 0;
fMesh.fVertexBuffer.reset(vertexBuffer);
fMesh.fVertexCount = verticesPerRepetition;
fMesh.fBaseVertex = firstVertex;
fMesh.fPatternRepeatCount = repeatCount;
fMesh.fMaxPatternRepetitionsInIndexBuffer = maxRepetitions;
return vertices;
}
void GrMeshDrawOp::PatternHelper::recordDraw(Target* target, const GrGeometryProcessor* gp,
const GrPipeline* pipeline) {
target->draw(gp, pipeline, fMesh);
}
void* GrMeshDrawOp::QuadHelper::init(Target* target, size_t vertexStride, int quadsToDraw) {
sk_sp<const GrBuffer> quadIndexBuffer(target->resourceProvider()->refQuadIndexBuffer());
if (!quadIndexBuffer) {
SkDebugf("Could not get quad index buffer.");
return nullptr;
}
return this->INHERITED::init(target, kTriangles_GrPrimitiveType, vertexStride,
quadIndexBuffer.get(), kVerticesPerQuad, kIndicesPerQuad,
quadsToDraw);
}
void GrMeshDrawOp::onExecute(GrOpFlushState* state) {
SkASSERT(!state->drawOpArgs().fAppliedClip);
SkASSERT(!state->drawOpArgs().fDstTexture.texture());
int currUploadIdx = 0;
int currMeshIdx = 0;
SkASSERT(fQueuedDraws.empty() || fBaseDrawToken == state->nextTokenToFlush());
for (int currDrawIdx = 0; currDrawIdx < fQueuedDraws.count(); ++currDrawIdx) {
GrDrawOpUploadToken drawToken = state->nextTokenToFlush();
while (currUploadIdx < fInlineUploads.count() &&
fInlineUploads[currUploadIdx].fUploadBeforeToken == drawToken) {
state->commandBuffer()->inlineUpload(state, fInlineUploads[currUploadIdx++].fUpload,
state->drawOpArgs().fRenderTarget);
}
const QueuedDraw& draw = fQueuedDraws[currDrawIdx];
SkASSERT(draw.fPipeline->getRenderTarget() == state->drawOpArgs().fRenderTarget);
state->commandBuffer()->draw(*draw.fPipeline, *draw.fGeometryProcessor.get(),
fMeshes.begin() + currMeshIdx, draw.fMeshCnt, this->bounds());
currMeshIdx += draw.fMeshCnt;
state->flushToken();
}
SkASSERT(currUploadIdx == fInlineUploads.count());
SkASSERT(currMeshIdx == fMeshes.count());
fQueuedDraws.reset();
fInlineUploads.reset();
}
//////////////////////////////////////////////////////////////////////////////
void GrMeshDrawOp::Target::draw(const GrGeometryProcessor* gp, const GrPipeline* pipeline,
const GrMesh& mesh) {
GrMeshDrawOp* op = this->meshDrawOp();
op->fMeshes.push_back(mesh);
if (!op->fQueuedDraws.empty()) {
// If the last draw shares a geometry processor and pipeline and there are no intervening
// uploads, add this mesh to it.
GrLegacyMeshDrawOp::QueuedDraw& lastDraw = op->fQueuedDraws.back();
if (lastDraw.fGeometryProcessor == gp && lastDraw.fPipeline == pipeline &&
(op->fInlineUploads.empty() ||
op->fInlineUploads.back().fUploadBeforeToken != this->nextDrawToken())) {
++lastDraw.fMeshCnt;
return;
}
}
GrLegacyMeshDrawOp::QueuedDraw& draw = op->fQueuedDraws.push_back();
GrDrawOpUploadToken token = this->state()->issueDrawToken();
draw.fGeometryProcessor.reset(gp);
draw.fPipeline = pipeline;
draw.fMeshCnt = 1;
if (op->fQueuedDraws.count() == 1) {
op->fBaseDrawToken = token;
}
}
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