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/*
* Copyright 2017 Google Inc.
*
* Use of this source code is governed by a BSD-style license that can be
* found in the LICENSE file.
*/
#include "GrProcessorSet.h"
#include "GrAppliedClip.h"
#include "GrCaps.h"
#include "GrXferProcessor.h"
GrProcessorSet::GrProcessorSet(GrPaint&& paint) {
fXPFactory = paint.fXPFactory;
fFlags = 0;
if (paint.numColorFragmentProcessors() <= kMaxColorProcessors) {
fColorFragmentProcessorCnt = paint.numColorFragmentProcessors();
fFragmentProcessors.reset(paint.numTotalFragmentProcessors());
int i = 0;
for (auto& fp : paint.fColorFragmentProcessors) {
fFragmentProcessors[i++] = fp.release();
}
for (auto& fp : paint.fCoverageFragmentProcessors) {
fFragmentProcessors[i++] = fp.release();
}
if (paint.usesDistanceVectorField()) {
fFlags |= kUseDistanceVectorField_Flag;
}
} else {
SkDebugf("Insane number of color fragment processors in paint. Dropping all processors.");
fColorFragmentProcessorCnt = 0;
}
if (paint.getDisableOutputConversionToSRGB()) {
fFlags |= kDisableOutputConversionToSRGB_Flag;
}
if (paint.getAllowSRGBInputs()) {
fFlags |= kAllowSRGBInputs_Flag;
}
}
GrProcessorSet::~GrProcessorSet() {
for (int i = fFragmentProcessorOffset; i < fFragmentProcessors.count(); ++i) {
if (this->isPendingExecution()) {
fFragmentProcessors[i]->completedExecution();
} else {
fFragmentProcessors[i]->unref();
}
}
}
void GrProcessorSet::makePendingExecution() {
SkASSERT(!(kPendingExecution_Flag & fFlags));
fFlags |= kPendingExecution_Flag;
for (int i = fFragmentProcessorOffset; i < fFragmentProcessors.count(); ++i) {
fFragmentProcessors[i]->addPendingExecution();
fFragmentProcessors[i]->unref();
}
}
bool GrProcessorSet::operator==(const GrProcessorSet& that) const {
int fpCount = this->numFragmentProcessors();
if (((fFlags ^ that.fFlags) & ~kPendingExecution_Flag) ||
fpCount != that.numFragmentProcessors() ||
fColorFragmentProcessorCnt != that.fColorFragmentProcessorCnt) {
return false;
}
for (int i = 0; i < fpCount; ++i) {
int a = i + fFragmentProcessorOffset;
int b = i + that.fFragmentProcessorOffset;
if (!fFragmentProcessors[a]->isEqual(*that.fFragmentProcessors[b])) {
return false;
}
}
if (fXPFactory != that.fXPFactory) {
return false;
}
return true;
}
//////////////////////////////////////////////////////////////////////////////
void GrProcessorSet::Analysis::internalInit(const GrProcessorAnalysisColor& colorInput,
const GrProcessorAnalysisCoverage coverageInput,
const GrProcessorSet& processors,
const GrFragmentProcessor* clipFP,
const GrCaps& caps) {
GrColorFragmentProcessorAnalysis colorInfo(colorInput);
fCompatibleWithCoverageAsAlpha = GrProcessorAnalysisCoverage::kLCD != coverageInput;
fValidInputColor = colorInput.isConstant(&fInputColor);
const GrFragmentProcessor* const* fps =
processors.fFragmentProcessors.get() + processors.fFragmentProcessorOffset;
colorInfo.analyzeProcessors(fps, processors.fColorFragmentProcessorCnt);
fCompatibleWithCoverageAsAlpha &= colorInfo.allProcessorsCompatibleWithCoverageAsAlpha();
fps += processors.fColorFragmentProcessorCnt;
int n = processors.numCoverageFragmentProcessors();
bool hasCoverageFP = n > 0;
bool coverageUsesLocalCoords = false;
for (int i = 0; i < n; ++i) {
if (!fps[i]->compatibleWithCoverageAsAlpha()) {
fCompatibleWithCoverageAsAlpha = false;
// Other than tests that exercise atypical behavior we expect all coverage FPs to be
// compatible with the coverage-as-alpha optimization.
GrCapsDebugf(&caps, "Coverage FP is not compatible with coverage as alpha.\n");
}
coverageUsesLocalCoords |= fps[i]->usesLocalCoords();
}
if (clipFP) {
fCompatibleWithCoverageAsAlpha &= clipFP->compatibleWithCoverageAsAlpha();
coverageUsesLocalCoords |= clipFP->usesLocalCoords();
hasCoverageFP = true;
}
fInitialColorProcessorsToEliminate = colorInfo.initialProcessorsToEliminate(&fInputColor);
fValidInputColor |= SkToBool(fInitialColorProcessorsToEliminate);
GrProcessorAnalysisColor outputColor = colorInfo.outputColor();
if (outputColor.isConstant(&fKnownOutputColor)) {
fOutputColorType = static_cast<unsigned>(ColorType::kConstant);
} else if (outputColor.isOpaque()) {
fOutputColorType = static_cast<unsigned>(ColorType::kOpaque);
} else {
fOutputColorType = static_cast<unsigned>(ColorType::kUnknown);
}
GrProcessorAnalysisCoverage outputCoverage;
if (GrProcessorAnalysisCoverage::kLCD == coverageInput) {
outputCoverage = GrProcessorAnalysisCoverage::kLCD;
} else if (hasCoverageFP || GrProcessorAnalysisCoverage::kSingleChannel == coverageInput) {
outputCoverage = GrProcessorAnalysisCoverage::kSingleChannel;
} else {
outputCoverage = GrProcessorAnalysisCoverage::kNone;
}
fOutputCoverageType = static_cast<unsigned>(outputCoverage);
GrXPFactory::AnalysisProperties props = GrXPFactory::GetAnalysisProperties(
processors.fXPFactory, colorInfo.outputColor(), outputCoverage, caps);
if (!processors.numCoverageFragmentProcessors() &&
GrProcessorAnalysisCoverage::kNone == coverageInput) {
fCanCombineOverlappedStencilAndCover = SkToBool(
props & GrXPFactory::AnalysisProperties::kCanCombineOverlappedStencilAndCover);
} else {
// If we have non-clipping coverage processors we don't try to merge stencil steps as its
// unclear whether it will be correct. We don't expect this to happen in practice.
fCanCombineOverlappedStencilAndCover = false;
}
fRequiresDstTexture = SkToBool(props & GrXPFactory::AnalysisProperties::kRequiresDstTexture);
fIgnoresInputColor = SkToBool(props & GrXPFactory::AnalysisProperties::kIgnoresInputColor);
fCompatibleWithCoverageAsAlpha &=
SkToBool(props & GrXPFactory::AnalysisProperties::kCompatibleWithAlphaAsCoverage);
fRequiresBarrierBetweenOverlappingDraws = SkToBool(
props & GrXPFactory::AnalysisProperties::kRequiresBarrierBetweenOverlappingDraws);
if (props & GrXPFactory::AnalysisProperties::kIgnoresInputColor) {
fInitialColorProcessorsToEliminate = processors.numColorFragmentProcessors();
// If the output of the last color stage is known then the kIgnoresInputColor optimization
// may depend upon it being the input to the xp.
if (!outputColor.isConstant(&fInputColor)) {
// Otherwise, the only property the XP factory could have relied upon to compute
// kIgnoresInputColor is opaqueness.
fInputColor = GrColor_WHITE;
}
fValidInputColor = true;
fUsesLocalCoords = coverageUsesLocalCoords;
} else {
fUsesLocalCoords = coverageUsesLocalCoords | colorInfo.usesLocalCoords();
}
}
void GrProcessorSet::Analysis::init(const GrProcessorAnalysisColor& colorInput,
const GrProcessorAnalysisCoverage coverageInput,
const GrProcessorSet& processors,
const GrAppliedClip* appliedClip,
const GrCaps& caps) {
const GrFragmentProcessor* clipFP =
appliedClip ? appliedClip->clipCoverageFragmentProcessor() : nullptr;
this->internalInit(colorInput, coverageInput, processors, clipFP, caps);
fIsInitializedWithProcessorSet = true;
}
GrProcessorSet::Analysis::Analysis(const GrProcessorAnalysisColor& colorInput,
const GrProcessorAnalysisCoverage coverageInput,
const GrXPFactory* factory,
const GrCaps& caps)
: Analysis() {
GrPaint paint;
paint.setXPFactory(factory);
this->internalInit(colorInput, coverageInput, GrProcessorSet(std::move(paint)), nullptr, caps);
}
void GrProcessorSet::analyzeAndEliminateFragmentProcessors(
Analysis* analysis,
const GrProcessorAnalysisColor& colorInput,
const GrProcessorAnalysisCoverage coverageInput,
const GrAppliedClip* clip,
const GrCaps& caps) {
analysis->init(colorInput, coverageInput, *this, clip, caps);
if (analysis->fInitialColorProcessorsToEliminate > 0) {
for (unsigned i = 0; i < analysis->fInitialColorProcessorsToEliminate; ++i) {
if (this->isPendingExecution()) {
fFragmentProcessors[i + fFragmentProcessorOffset]->completedExecution();
} else {
fFragmentProcessors[i + fFragmentProcessorOffset]->unref();
}
fFragmentProcessors[i + fFragmentProcessorOffset] = nullptr;
}
fFragmentProcessorOffset += analysis->fInitialColorProcessorsToEliminate;
fColorFragmentProcessorCnt -= analysis->fInitialColorProcessorsToEliminate;
SkASSERT(fFragmentProcessorOffset + fColorFragmentProcessorCnt <=
fFragmentProcessors.count());
analysis->fInitialColorProcessorsToEliminate = 0;
}
}
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