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/*
* Copyright 2014 Google Inc.
*
* Use of this source code is governed by a BSD-style license that can be
* found in the LICENSE file.
*/
#include "GrProcOptInfo.h"
#include "GrGeometryProcessor.h"
#include "batches/GrDrawBatch.h"
void GrProcOptInfo::calcColorWithBatch(const GrDrawBatch* batch,
const GrFragmentProcessor* const processors[],
int cnt) {
GrInitInvariantOutput out;
batch->getInvariantOutputColor(&out);
fInOut.reset(out);
this->internalCalc(processors, cnt, batch->willReadFragmentPosition());
}
void GrProcOptInfo::calcCoverageWithBatch(const GrDrawBatch* batch,
const GrFragmentProcessor* const processors[],
int cnt) {
GrInitInvariantOutput out;
batch->getInvariantOutputCoverage(&out);
fInOut.reset(out);
this->internalCalc(processors, cnt, batch->willReadFragmentPosition());
}
void GrProcOptInfo::calcColorWithPrimProc(const GrPrimitiveProcessor* primProc,
const GrFragmentProcessor * const processors[],
int cnt) {
GrInitInvariantOutput out;
primProc->getInvariantOutputColor(&out);
fInOut.reset(out);
this->internalCalc(processors, cnt, primProc->willReadFragmentPosition());
}
void GrProcOptInfo::calcCoverageWithPrimProc(const GrPrimitiveProcessor* primProc,
const GrFragmentProcessor * const processors[],
int cnt) {
GrInitInvariantOutput out;
primProc->getInvariantOutputCoverage(&out);
fInOut.reset(out);
this->internalCalc(processors, cnt, primProc->willReadFragmentPosition());
}
void GrProcOptInfo::calcWithInitialValues(const GrFragmentProcessor * const processors[],
int cnt,
GrColor startColor,
GrColorComponentFlags flags,
bool areCoverageStages) {
GrInitInvariantOutput out;
out.fIsSingleComponent = areCoverageStages;
out.fColor = startColor;
out.fValidFlags = flags;
fInOut.reset(out);
this->internalCalc(processors, cnt, false);
}
void GrProcOptInfo::internalCalc(const GrFragmentProcessor* const processors[],
int cnt,
bool initWillReadFragmentPosition) {
fFirstEffectiveProcessorIndex = 0;
fInputColorIsUsed = true;
fInputColor = fInOut.color();
fReadsFragPosition = initWillReadFragmentPosition;
for (int i = 0; i < cnt; ++i) {
const GrFragmentProcessor* processor = processors[i];
fInOut.resetWillUseInputColor();
processor->computeInvariantOutput(&fInOut);
SkDEBUGCODE(fInOut.validate());
if (!fInOut.willUseInputColor()) {
fFirstEffectiveProcessorIndex = i;
fInputColorIsUsed = false;
// Reset these since we don't care if previous stages read these values
fReadsFragPosition = initWillReadFragmentPosition;
}
if (processor->willReadFragmentPosition()) {
fReadsFragPosition = true;
}
if (kRGBA_GrColorComponentFlags == fInOut.validFlags()) {
fFirstEffectiveProcessorIndex = i + 1;
fInputColor = fInOut.color();
fInputColorIsUsed = true;
// Since we are clearing all previous color stages we are in a state where we have found
// zero stages that don't multiply the inputColor.
fInOut.resetNonMulStageFound();
// Reset these since we don't care if previous stages read these values
fReadsFragPosition = initWillReadFragmentPosition;
}
}
}
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