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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 "GrAppliedClip.h"
#include "GrCaps.h"
#include "GrGpu.h"
#include "GrPipelineBuilder.h"
#include "GrProcOptInfo.h"
#include "GrRenderTargetContext.h"
#include "GrRenderTargetOpList.h"
#include "GrRenderTargetPriv.h"
#include "GrXferProcessor.h"
#include "ops/GrOp.h"
GrPipelineOptimizations GrPipeline::init(const InitArgs& args) {
SkASSERT(args.fAnalysis);
SkASSERT(args.fRenderTarget);
fRenderTarget.reset(args.fRenderTarget);
fScissorState = args.fAppliedClip->scissorState();
fWindowRectsState = args.fAppliedClip->windowRectsState();
fUserStencilSettings = args.fUserStencil;
fDrawFace = static_cast<int16_t>(args.fDrawFace);
fFlags = args.fFlags;
if (args.fProcessors->usesDistanceVectorField()) {
fFlags |= kUsesDistanceVectorField_Flag;
}
if (args.fAppliedClip->hasStencilClip()) {
fFlags |= kHasStencilClip_Flag;
}
if (!args.fUserStencil->isDisabled(args.fAppliedClip->hasStencilClip())) {
fFlags |= kStencilEnabled_Flag;
}
if (args.fProcessors->disableOutputConversionToSRGB()) {
fFlags |= kDisableOutputConversionToSRGB_Flag;
}
if (args.fProcessors->allowSRGBInputs()) {
fFlags |= kAllowSRGBInputs_Flag;
}
bool isHWAA = kHWAntialias_Flag & args.fFlags;
// Create XferProcessor from DS's XPFactory
bool hasMixedSamples = args.fRenderTarget->isMixedSampled() && (isHWAA || isStencilEnabled());
const GrXPFactory* xpFactory = args.fProcessors->xpFactory();
sk_sp<GrXferProcessor> xferProcessor;
if (xpFactory) {
xferProcessor.reset(xpFactory->createXferProcessor(*args.fAnalysis, hasMixedSamples,
&args.fDstTexture, *args.fCaps));
SkASSERT(xferProcessor);
} else {
// This may return nullptr in the common case of src-over implemented using hw blending.
xferProcessor.reset(GrPorterDuffXPFactory::CreateSrcOverXferProcessor(
*args.fCaps, *args.fAnalysis, hasMixedSamples, &args.fDstTexture));
}
GrColor overrideColor = GrColor_ILLEGAL;
int colorFPsToEliminate = args.fAnalysis->initialColorProcessorsToEliminate(&overrideColor);
GrXferProcessor::OptFlags optFlags = GrXferProcessor::kNone_OptFlags;
const GrXferProcessor* xpForOpts = xferProcessor ? xferProcessor.get() :
&GrPorterDuffXPFactory::SimpleSrcOverXP();
optFlags = xpForOpts->getOptimizations(*args.fAnalysis);
// 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;
}
fXferProcessor.reset(xferProcessor.get());
if ((optFlags & GrXferProcessor::kIgnoreColor_OptFlag)) {
colorFPsToEliminate = args.fProcessors->numColorFragmentProcessors();
}
// Copy GrFragmentProcessors from GrPipelineBuilder to Pipeline, possibly removing some of the
// color fragment processors.
fNumColorProcessors = args.fProcessors->numColorFragmentProcessors() - colorFPsToEliminate;
int numTotalProcessors =
fNumColorProcessors + args.fProcessors->numCoverageFragmentProcessors();
if (args.fAppliedClip->clipCoverageFragmentProcessor()) {
++numTotalProcessors;
}
fFragmentProcessors.reset(numTotalProcessors);
int currFPIdx = 0;
for (int i = colorFPsToEliminate; i < args.fProcessors->numColorFragmentProcessors();
++i, ++currFPIdx) {
const GrFragmentProcessor* fp = args.fProcessors->colorFragmentProcessor(i);
fFragmentProcessors[currFPIdx].reset(fp);
}
for (int i = 0; i < args.fProcessors->numCoverageFragmentProcessors(); ++i, ++currFPIdx) {
const GrFragmentProcessor* fp = args.fProcessors->coverageFragmentProcessor(i);
fFragmentProcessors[currFPIdx].reset(fp);
}
if (const GrFragmentProcessor* fp = args.fAppliedClip->clipCoverageFragmentProcessor()) {
fFragmentProcessors[currFPIdx].reset(fp);
}
// Setup info we need to pass to GrPrimitiveProcessors that are used with this GrPipeline.
GrPipelineOptimizations optimizations;
optimizations.fFlags = 0;
if (GrColor_ILLEGAL != overrideColor) {
optimizations.fFlags |= GrPipelineOptimizations::kUseOverrideColor_Flag;
optimizations.fOverrideColor = overrideColor;
}
if (args.fAnalysis->usesLocalCoords()) {
optimizations.fFlags |= GrPipelineOptimizations::kReadsLocalCoords_Flag;
}
if (SkToBool(optFlags & GrXferProcessor::kCanTweakAlphaForCoverage_OptFlag)) {
optimizations.fFlags |= GrPipelineOptimizations::kCanTweakAlphaForCoverage_Flag;
}
if (GrXPFactory::WillReadDst(xpFactory, *args.fAnalysis)) {
optimizations.fFlags |= GrPipelineOptimizations::kXPReadsDst_Flag;
}
return optimizations;
}
static void add_dependencies_for_processor(const GrFragmentProcessor* proc, GrRenderTarget* rt) {
GrFragmentProcessor::TextureAccessIter iter(proc);
while (const GrProcessor::TextureSampler* sampler = iter.next()) {
SkASSERT(rt->getLastOpList());
rt->getLastOpList()->addDependency(sampler->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.numTextureSamplers(); ++i) {
GrTexture* texture = xfer.textureSampler(i).texture();
SkASSERT(rt->getLastOpList());
rt->getLastOpList()->addDependency(texture);
}
}
GrPipeline::GrPipeline(GrRenderTarget* rt, SkBlendMode blendmode)
: fRenderTarget(rt)
, fScissorState()
, fWindowRectsState()
, fUserStencilSettings(&GrUserStencilSettings::kUnused)
, fDrawFace(static_cast<uint16_t>(GrDrawFace::kBoth))
, fFlags()
, fXferProcessor(GrPorterDuffXPFactory::CreateNoCoverageXP(blendmode).get())
, fFragmentProcessors()
, fNumColorProcessors(0) {
}
////////////////////////////////////////////////////////////////////////////////
bool GrPipeline::AreEqual(const GrPipeline& a, const GrPipeline& b) {
SkASSERT(&a != &b);
if (a.getRenderTarget() != b.getRenderTarget() ||
a.fFragmentProcessors.count() != b.fFragmentProcessors.count() ||
a.fNumColorProcessors != b.fNumColorProcessors ||
a.fScissorState != b.fScissorState ||
!a.fWindowRectsState.cheapEqualTo(b.fWindowRectsState) ||
a.fFlags != b.fFlags ||
a.fUserStencilSettings != b.fUserStencilSettings ||
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))) {
return false;
}
}
return true;
}
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