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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 "GrBatch.h"
#include "GrGpu.h"
#include "GrPipelineBuilder.h"
#include "GrProcOptInfo.h"
#include "GrXferProcessor.h"
GrPipeline::GrPipeline(const GrPipelineBuilder& pipelineBuilder,
const GrProcOptInfo& colorPOI,
const GrProcOptInfo& coveragePOI,
const GrCaps& caps,
const GrScissorState& scissorState,
const GrXferProcessor::DstTexture* dstTexture) {
// Create XferProcessor from DS's XPFactory
SkAutoTUnref<GrXferProcessor> xferProcessor(
pipelineBuilder.getXPFactory()->createXferProcessor(
colorPOI, coveragePOI, pipelineBuilder.hasMixedSamples(), dstTexture, caps));
GrColor overrideColor = GrColor_ILLEGAL;
if (colorPOI.firstEffectiveStageIndex() != 0) {
overrideColor = colorPOI.inputColorToEffectiveStage();
}
GrXferProcessor::OptFlags optFlags = GrXferProcessor::kNone_OptFlags;
if (xferProcessor) {
fXferProcessor.reset(xferProcessor.get());
optFlags = xferProcessor->getOptimizations(colorPOI,
coveragePOI,
pipelineBuilder.getStencil().doesWrite(),
&overrideColor,
caps);
}
// 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;
}
// 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 (!xferProcessor || (GrXferProcessor::kSkipDraw_OptFlag & optFlags)) {
// Set the fields that don't default init and return. The lack of a render target will
// indicate that this can be skipped.
fFlags = 0;
fDrawFace = GrPipelineBuilder::kInvalid_DrawFace;
return;
}
fRenderTarget.reset(pipelineBuilder.fRenderTarget.get());
SkASSERT(fRenderTarget);
fScissorState = scissorState;
fStencilSettings = pipelineBuilder.getStencil();
fDrawFace = pipelineBuilder.getDrawFace();
fFlags = 0;
if (pipelineBuilder.isHWAntialias()) {
fFlags |= kHWAA_Flag;
}
if (pipelineBuilder.isDither()) {
fFlags |= kDither_Flag;
}
if (pipelineBuilder.snapVerticesToPixelCenters()) {
fFlags |= kSnapVertices_Flag;
}
int firstColorStageIdx = colorPOI.firstEffectiveStageIndex();
// TODO: Once we can handle single or four channel input into coverage stages then we can use
// GrPipelineBuilder's coverageProcInfo (like color above) to set this initial information.
int firstCoverageStageIdx = 0;
this->adjustProgramFromOptimizations(pipelineBuilder, optFlags, colorPOI, coveragePOI,
&firstColorStageIdx, &firstCoverageStageIdx);
bool usesLocalCoords = false;
// Copy Stages from PipelineBuilder to Pipeline
for (int i = firstColorStageIdx; i < pipelineBuilder.numColorFragmentStages(); ++i) {
SkNEW_APPEND_TO_TARRAY(&fFragmentStages,
GrPendingFragmentStage,
(pipelineBuilder.fColorStages[i]));
usesLocalCoords = usesLocalCoords ||
pipelineBuilder.fColorStages[i].processor()->usesLocalCoords();
}
fNumColorStages = fFragmentStages.count();
for (int i = firstCoverageStageIdx; i < pipelineBuilder.numCoverageFragmentStages(); ++i) {
SkNEW_APPEND_TO_TARRAY(&fFragmentStages,
GrPendingFragmentStage,
(pipelineBuilder.fCoverageStages[i]));
usesLocalCoords = usesLocalCoords ||
pipelineBuilder.fCoverageStages[i].processor()->usesLocalCoords();
}
// Setup info we need to pass to GrPrimitiveProcessors that are used with this GrPipeline.
fInfoForPrimitiveProcessor.fFlags = 0;
if (!SkToBool(optFlags & GrXferProcessor::kIgnoreColor_OptFlag)) {
fInfoForPrimitiveProcessor.fFlags |= GrPipelineInfo::kReadsColor_GrPipelineInfoFlag;
}
if (GrColor_ILLEGAL != overrideColor) {
fInfoForPrimitiveProcessor.fFlags |= GrPipelineInfo::kUseOverrideColor_GrPipelineInfoFlag;
fInfoForPrimitiveProcessor.fOverrideColor = overrideColor;
}
if (!SkToBool(optFlags & GrXferProcessor::kIgnoreCoverage_OptFlag)) {
fInfoForPrimitiveProcessor.fFlags |= GrPipelineInfo::kReadsCoverage_GrPipelineInfoFlag;
}
if (usesLocalCoords) {
fInfoForPrimitiveProcessor.fFlags |= GrPipelineInfo::kReadsLocalCoords_GrPipelineInfoFlag;
}
if (SkToBool(optFlags & GrXferProcessor::kCanTweakAlphaForCoverage_OptFlag)) {
fInfoForPrimitiveProcessor.fFlags |=
GrPipelineInfo::kCanTweakAlphaForCoverage_GrPipelineInfoFlag;
}
}
void GrPipeline::adjustProgramFromOptimizations(const GrPipelineBuilder& pipelineBuilder,
GrXferProcessor::OptFlags flags,
const GrProcOptInfo& colorPOI,
const GrProcOptInfo& coveragePOI,
int* firstColorStageIdx,
int* firstCoverageStageIdx) {
fReadsFragPosition = fXferProcessor->willReadFragmentPosition();
if ((flags & GrXferProcessor::kIgnoreColor_OptFlag) ||
(flags & GrXferProcessor::kOverrideColor_OptFlag)) {
*firstColorStageIdx = pipelineBuilder.numColorFragmentStages();
} else {
if (coveragePOI.readsFragPosition()) {
fReadsFragPosition = true;
}
}
if (flags & GrXferProcessor::kIgnoreCoverage_OptFlag) {
*firstCoverageStageIdx = pipelineBuilder.numCoverageFragmentStages();
} else {
if (coveragePOI.readsFragPosition()) {
fReadsFragPosition = true;
}
}
}
////////////////////////////////////////////////////////////////////////////////
bool GrPipeline::isEqual(const GrPipeline& that) const {
// If we point to the same pipeline, then we are necessarily equal
if (this == &that) {
return true;
}
if (this->getRenderTarget() != that.getRenderTarget() ||
this->fFragmentStages.count() != that.fFragmentStages.count() ||
this->fNumColorStages != that.fNumColorStages ||
this->fScissorState != that.fScissorState ||
this->fFlags != that.fFlags ||
this->fStencilSettings != that.fStencilSettings ||
this->fDrawFace != that.fDrawFace) {
return false;
}
if (!this->getXferProcessor()->isEqual(*that.getXferProcessor())) {
return false;
}
// The program desc comparison should have already assured that the stage counts match.
SkASSERT(this->numFragmentStages() == that.numFragmentStages());
for (int i = 0; i < this->numFragmentStages(); i++) {
if (this->getFragmentStage(i) != that.getFragmentStage(i)) {
return false;
}
}
return true;
}
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