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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 "GrPipeline.h"
#include "GrCaps.h"
#include "GrDrawTarget.h"
#include "GrGpu.h"
#include "GrPipelineBuilder.h"
#include "GrProcOptInfo.h"
#include "GrXferProcessor.h"
#include "batches/GrBatch.h"
GrPipeline* GrPipeline::CreateAt(void* memory, const CreateArgs& args,
GrXPOverridesForBatch* overrides) {
const GrPipelineBuilder& builder = *args.fPipelineBuilder;
// Create XferProcessor from DS's XPFactory
const GrXPFactory* xpFactory = builder.getXPFactory();
SkAutoTUnref<GrXferProcessor> xferProcessor;
if (xpFactory) {
xferProcessor.reset(xpFactory->createXferProcessor(args.fOpts,
builder.hasMixedSamples(),
&args.fDstTexture,
*args.fCaps));
if (!xferProcessor) {
return nullptr;
}
} else {
// This may return nullptr in the common case of src-over implemented using hw blending.
xferProcessor.reset(GrPorterDuffXPFactory::CreateSrcOverXferProcessor(
*args.fCaps,
args.fOpts,
builder.hasMixedSamples(),
&args.fDstTexture));
}
GrColor overrideColor = GrColor_ILLEGAL;
if (args.fOpts.fColorPOI.firstEffectiveProcessorIndex() != 0) {
overrideColor = args.fOpts.fColorPOI.inputColorToFirstEffectiveProccesor();
}
GrXferProcessor::OptFlags optFlags = GrXferProcessor::kNone_OptFlags;
const GrXferProcessor* xpForOpts = xferProcessor ? xferProcessor.get() :
&GrPorterDuffXPFactory::SimpleSrcOverXP();
optFlags = xpForOpts->getOptimizations(args.fOpts,
builder.getStencil().doesWrite(),
&overrideColor,
*args.fCaps);
// When path rendering the stencil settings are not always set on the GrPipelineBuilder
// so we must check the draw type. In cases where we will skip drawing we simply return a
// null GrPipeline.
if (GrXferProcessor::kSkipDraw_OptFlag & optFlags) {
return nullptr;
}
// No need to have an override color if it isn't even going to be used.
if (SkToBool(GrXferProcessor::kIgnoreColor_OptFlag & optFlags)) {
overrideColor = GrColor_ILLEGAL;
}
GrPipeline* pipeline = new (memory) GrPipeline;
pipeline->fXferProcessor.reset(xferProcessor);
pipeline->fRenderTarget.reset(builder.fRenderTarget.get());
SkASSERT(pipeline->fRenderTarget);
pipeline->fScissorState = *args.fScissor;
pipeline->fStencilSettings = builder.getStencil();
pipeline->fDrawFace = builder.getDrawFace();
pipeline->fFlags = 0;
if (builder.isHWAntialias()) {
pipeline->fFlags |= kHWAA_Flag;
}
if (builder.snapVerticesToPixelCenters()) {
pipeline->fFlags |= kSnapVertices_Flag;
}
int firstColorProcessorIdx = args.fOpts.fColorPOI.firstEffectiveProcessorIndex();
// TODO: Once we can handle single or four channel input into coverage GrFragmentProcessors
// then we can use GrPipelineBuilder's coverageProcInfo (like color above) to set this initial
// information.
int firstCoverageProcessorIdx = 0;
pipeline->adjustProgramFromOptimizations(builder, optFlags, args.fOpts.fColorPOI,
args.fOpts.fCoveragePOI, &firstColorProcessorIdx,
&firstCoverageProcessorIdx);
bool usesLocalCoords = false;
// Copy GrFragmentProcessors from GrPipelineBuilder to Pipeline
pipeline->fNumColorProcessors = builder.numColorFragmentProcessors() - firstColorProcessorIdx;
int numTotalProcessors = pipeline->fNumColorProcessors +
builder.numCoverageFragmentProcessors() - firstCoverageProcessorIdx;
pipeline->fFragmentProcessors.reset(numTotalProcessors);
int currFPIdx = 0;
for (int i = firstColorProcessorIdx; i < builder.numColorFragmentProcessors();
++i, ++currFPIdx) {
const GrFragmentProcessor* fp = builder.getColorFragmentProcessor(i);
pipeline->fFragmentProcessors[currFPIdx].reset(fp);
usesLocalCoords = usesLocalCoords || fp->usesLocalCoords();
}
for (int i = firstCoverageProcessorIdx; i < builder.numCoverageFragmentProcessors();
++i, ++currFPIdx) {
const GrFragmentProcessor* fp = builder.getCoverageFragmentProcessor(i);
pipeline->fFragmentProcessors[currFPIdx].reset(fp);
usesLocalCoords = usesLocalCoords || fp->usesLocalCoords();
}
// Setup info we need to pass to GrPrimitiveProcessors that are used with this GrPipeline.
overrides->fFlags = 0;
if (!SkToBool(optFlags & GrXferProcessor::kIgnoreColor_OptFlag)) {
overrides->fFlags |= GrXPOverridesForBatch::kReadsColor_Flag;
}
if (GrColor_ILLEGAL != overrideColor) {
overrides->fFlags |= GrXPOverridesForBatch::kUseOverrideColor_Flag;
overrides->fOverrideColor = overrideColor;
}
if (!SkToBool(optFlags & GrXferProcessor::kIgnoreCoverage_OptFlag)) {
overrides->fFlags |= GrXPOverridesForBatch::kReadsCoverage_Flag;
}
if (usesLocalCoords) {
overrides->fFlags |= GrXPOverridesForBatch::kReadsLocalCoords_Flag;
}
if (SkToBool(optFlags & GrXferProcessor::kCanTweakAlphaForCoverage_OptFlag)) {
overrides->fFlags |= GrXPOverridesForBatch::kCanTweakAlphaForCoverage_Flag;
}
GrXPFactory::InvariantBlendedColor blendedColor;
if (xpFactory) {
xpFactory->getInvariantBlendedColor(args.fOpts.fColorPOI, &blendedColor);
} else {
GrPorterDuffXPFactory::SrcOverInvariantBlendedColor(args.fOpts.fColorPOI.color(),
args.fOpts.fColorPOI.validFlags(),
args.fOpts.fColorPOI.isOpaque(),
&blendedColor);
}
if (blendedColor.fWillBlendWithDst) {
overrides->fFlags |= GrXPOverridesForBatch::kWillColorBlendWithDst_Flag;
}
return pipeline;
}
static void add_dependencies_for_processor(const GrFragmentProcessor* proc, GrRenderTarget* rt) {
for (int i = 0; i < proc->numChildProcessors(); ++i) {
// need to recurse
add_dependencies_for_processor(&proc->childProcessor(i), rt);
}
for (int i = 0; i < proc->numTextures(); ++i) {
GrTexture* texture = proc->textureAccess(i).getTexture();
SkASSERT(rt->getLastDrawTarget());
rt->getLastDrawTarget()->addDependency(texture);
}
}
void GrPipeline::addDependenciesTo(GrRenderTarget* rt) const {
for (int i = 0; i < fFragmentProcessors.count(); ++i) {
add_dependencies_for_processor(fFragmentProcessors[i].get(), rt);
}
const GrXferProcessor& xfer = this->getXferProcessor();
for (int i = 0; i < xfer.numTextures(); ++i) {
GrTexture* texture = xfer.textureAccess(i).getTexture();
SkASSERT(rt->getLastDrawTarget());
rt->getLastDrawTarget()->addDependency(texture);
}
}
void GrPipeline::adjustProgramFromOptimizations(const GrPipelineBuilder& pipelineBuilder,
GrXferProcessor::OptFlags flags,
const GrProcOptInfo& colorPOI,
const GrProcOptInfo& coveragePOI,
int* firstColorProcessorIdx,
int* firstCoverageProcessorIdx) {
fIgnoresCoverage = SkToBool(flags & GrXferProcessor::kIgnoreCoverage_OptFlag);
fReadsFragPosition = this->getXferProcessor().willReadFragmentPosition();
if ((flags & GrXferProcessor::kIgnoreColor_OptFlag) ||
(flags & GrXferProcessor::kOverrideColor_OptFlag)) {
*firstColorProcessorIdx = pipelineBuilder.numColorFragmentProcessors();
} else {
if (colorPOI.readsFragPosition()) {
fReadsFragPosition = true;
}
}
if (flags & GrXferProcessor::kIgnoreCoverage_OptFlag) {
*firstCoverageProcessorIdx = pipelineBuilder.numCoverageFragmentProcessors();
} else {
if (coveragePOI.readsFragPosition()) {
fReadsFragPosition = true;
}
}
}
////////////////////////////////////////////////////////////////////////////////
bool GrPipeline::AreEqual(const GrPipeline& a, const GrPipeline& b,
bool ignoreCoordTransforms) {
SkASSERT(&a != &b);
if (a.getRenderTarget() != b.getRenderTarget() ||
a.fFragmentProcessors.count() != b.fFragmentProcessors.count() ||
a.fNumColorProcessors != b.fNumColorProcessors ||
a.fScissorState != b.fScissorState ||
a.fFlags != b.fFlags ||
a.fStencilSettings != b.fStencilSettings ||
a.fDrawFace != b.fDrawFace) {
return false;
}
// Most of the time both are nullptr
if (a.fXferProcessor.get() || b.fXferProcessor.get()) {
if (!a.getXferProcessor().isEqual(b.getXferProcessor())) {
return false;
}
}
for (int i = 0; i < a.numFragmentProcessors(); i++) {
if (!a.getFragmentProcessor(i).isEqual(b.getFragmentProcessor(i), ignoreCoordTransforms)) {
return false;
}
}
return true;
}
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