| /* |
| * 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 "GrOptDrawState.h" |
| |
| #include "GrDrawState.h" |
| #include "GrDrawTargetCaps.h" |
| #include "GrGpu.h" |
| #include "GrProcOptInfo.h" |
| #include "GrXferProcessor.h" |
| |
| GrOptDrawState::GrOptDrawState(const GrDrawState& drawState, |
| GrColor color, |
| uint8_t coverage, |
| const GrDrawTargetCaps& caps, |
| const ScissorState& scissorState, |
| const GrDeviceCoordTexture* dstCopy, |
| GrGpu::DrawType drawType) |
| : fFinalized(false) { |
| GrColor coverageColor = GrColorPackRGBA(coverage, coverage, coverage, coverage); |
| fDrawType = drawType; |
| |
| const GrProcOptInfo& colorPOI = drawState.colorProcInfo(color); |
| const GrProcOptInfo& coveragePOI = drawState.coverageProcInfo(coverageColor); |
| |
| fColor = colorPOI.inputColorToEffectiveStage(); |
| fCoverage = coverage; |
| |
| // Create XferProcessor from DS's XPFactory |
| SkAutoTUnref<GrXferProcessor> xferProcessor( |
| drawState.getXPFactory()->createXferProcessor(colorPOI, coveragePOI)); |
| |
| GrXferProcessor::OptFlags optFlags; |
| if (xferProcessor) { |
| fXferProcessor.reset(xferProcessor.get()); |
| |
| optFlags = xferProcessor->getOptimizations(colorPOI, |
| coveragePOI, |
| drawState.isCoverageDrawing(), |
| drawState.isColorWriteDisabled(), |
| drawState.getStencil().doesWrite(), |
| &fColor, |
| &fCoverage); |
| } |
| |
| // When path rendering the stencil settings are not always set on the draw state |
| // so we must check the draw type. In cases where we will skip drawing we simply return a |
| // null GrOptDrawState. |
| if (!xferProcessor || ((GrXferProcessor::kSkipDraw_OptFlag & optFlags) && |
| GrGpu::kStencilPath_DrawType != drawType)) { |
| // 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 = GrDrawState::kInvalid_DrawFace; |
| fSrcBlend = kZero_GrBlendCoeff; |
| fDstBlend = kZero_GrBlendCoeff; |
| fBlendConstant = 0x0; |
| fViewMatrix.reset(); |
| return; |
| } |
| |
| fRenderTarget.reset(drawState.fRenderTarget.get()); |
| SkASSERT(fRenderTarget); |
| fScissorState = scissorState; |
| fViewMatrix = drawState.getViewMatrix(); |
| fStencilSettings = drawState.getStencil(); |
| fDrawFace = drawState.getDrawFace(); |
| // TODO move this out of optDrawState |
| if (dstCopy) { |
| fDstCopy = *dstCopy; |
| } |
| |
| fFlags = 0; |
| if (drawState.isHWAntialias()) { |
| fFlags |= kHWAA_Flag; |
| } |
| if (drawState.isColorWriteDisabled()) { |
| fFlags |= kDisableColorWrite_Flag; |
| } |
| if (drawState.isDither()) { |
| fFlags |= kDither_Flag; |
| } |
| |
| fDescInfo.fHasVertexColor = drawState.hasGeometryProcessor() && |
| drawState.getGeometryProcessor()->hasVertexColor(); |
| |
| fDescInfo.fHasVertexCoverage = drawState.hasGeometryProcessor() && |
| drawState.getGeometryProcessor()->hasVertexCoverage(); |
| |
| bool hasLocalCoords = drawState.hasGeometryProcessor() && |
| drawState.getGeometryProcessor()->hasLocalCoords(); |
| |
| int firstColorStageIdx = colorPOI.firstEffectiveStageIndex(); |
| fDescInfo.fInputColorIsUsed = colorPOI.inputColorIsUsed(); |
| if (colorPOI.removeVertexAttrib()) { |
| fDescInfo.fHasVertexColor = false; |
| } |
| |
| // TODO: Once we can handle single or four channel input into coverage stages then we can use |
| // drawState's coverageProcInfo (like color above) to set this initial information. |
| int firstCoverageStageIdx = 0; |
| fDescInfo.fInputCoverageIsUsed = true; |
| |
| |
| GrXferProcessor::BlendInfo blendInfo; |
| fXferProcessor->getBlendInfo(&blendInfo); |
| fSrcBlend = blendInfo.fSrcBlend; |
| fDstBlend = blendInfo.fDstBlend; |
| fBlendConstant = blendInfo.fBlendConstant; |
| |
| this->adjustProgramFromOptimizations(drawState, optFlags, colorPOI, coveragePOI, |
| &firstColorStageIdx, &firstCoverageStageIdx); |
| |
| fDescInfo.fRequiresLocalCoordAttrib = hasLocalCoords; |
| |
| // Copy GeometryProcesssor from DS or ODS |
| SkASSERT(GrGpu::IsPathRenderingDrawType(drawType) || |
| GrGpu::kStencilPath_DrawType || |
| drawState.hasGeometryProcessor()); |
| fGeometryProcessor.reset(drawState.getGeometryProcessor()); |
| |
| // Copy Stages from DS to ODS |
| for (int i = firstColorStageIdx; i < drawState.numColorStages(); ++i) { |
| SkNEW_APPEND_TO_TARRAY(&fFragmentStages, |
| GrPendingFragmentStage, |
| (drawState.fColorStages[i], hasLocalCoords)); |
| } |
| |
| fNumColorStages = fFragmentStages.count(); |
| for (int i = firstCoverageStageIdx; i < drawState.numCoverageStages(); ++i) { |
| SkNEW_APPEND_TO_TARRAY(&fFragmentStages, |
| GrPendingFragmentStage, |
| (drawState.fCoverageStages[i], hasLocalCoords)); |
| } |
| |
| // let the GP init the batch tracker |
| if (drawState.hasGeometryProcessor()) { |
| GrGeometryProcessor::InitBT init; |
| init.fOutputColor = fDescInfo.fInputColorIsUsed; |
| init.fOutputCoverage = fDescInfo.fInputCoverageIsUsed; |
| init.fColor = this->getColor(); |
| init.fCoverage = this->getCoverage(); |
| fGeometryProcessor->initBatchTracker(&fBatchTracker, init); |
| } |
| |
| this->setOutputStateInfo(drawState, coverageColor, optFlags, caps); |
| } |
| |
| void GrOptDrawState::setOutputStateInfo(const GrDrawState& ds, |
| GrColor coverage, |
| GrXferProcessor::OptFlags optFlags, |
| const GrDrawTargetCaps& caps) { |
| // Set this default and then possibly change our mind if there is coverage. |
| fDescInfo.fPrimaryOutputType = GrProgramDesc::kModulate_PrimaryOutputType; |
| fDescInfo.fSecondaryOutputType = GrProgramDesc::kNone_SecondaryOutputType; |
| |
| // Determine whether we should use dual source blending or shader code to keep coverage |
| // separate from color. |
| bool keepCoverageSeparate = !(optFlags & GrXferProcessor::kSetCoverageDrawing_OptFlag); |
| if (keepCoverageSeparate && !ds.hasSolidCoverage(coverage)) { |
| if (caps.dualSourceBlendingSupport()) { |
| if (kZero_GrBlendCoeff == fDstBlend) { |
| // write the coverage value to second color |
| fDescInfo.fSecondaryOutputType = GrProgramDesc::kCoverage_SecondaryOutputType; |
| fDstBlend = (GrBlendCoeff)GrGpu::kIS2C_GrBlendCoeff; |
| } else if (kSA_GrBlendCoeff == fDstBlend) { |
| // SA dst coeff becomes 1-(1-SA)*coverage when dst is partially covered. |
| fDescInfo.fSecondaryOutputType = GrProgramDesc::kCoverageISA_SecondaryOutputType; |
| fDstBlend = (GrBlendCoeff)GrGpu::kIS2C_GrBlendCoeff; |
| } else if (kSC_GrBlendCoeff == fDstBlend) { |
| // SA dst coeff becomes 1-(1-SA)*coverage when dst is partially covered. |
| fDescInfo.fSecondaryOutputType = GrProgramDesc::kCoverageISC_SecondaryOutputType; |
| fDstBlend = (GrBlendCoeff)GrGpu::kIS2C_GrBlendCoeff; |
| } |
| } else if (fDescInfo.fReadsDst && |
| kOne_GrBlendCoeff == fSrcBlend && |
| kZero_GrBlendCoeff == fDstBlend) { |
| fDescInfo.fPrimaryOutputType = GrProgramDesc::kCombineWithDst_PrimaryOutputType; |
| } |
| } |
| } |
| |
| void GrOptDrawState::adjustProgramFromOptimizations(const GrDrawState& ds, |
| GrXferProcessor::OptFlags flags, |
| const GrProcOptInfo& colorPOI, |
| const GrProcOptInfo& coveragePOI, |
| int* firstColorStageIdx, |
| int* firstCoverageStageIdx) { |
| fDescInfo.fReadsDst = false; |
| fDescInfo.fReadsFragPosition = false; |
| |
| if (flags & GrXferProcessor::kClearColorStages_OptFlag) { |
| fDescInfo.fInputColorIsUsed = true; |
| *firstColorStageIdx = ds.numColorStages(); |
| fDescInfo.fHasVertexColor = false; |
| } else { |
| fDescInfo.fReadsDst = colorPOI.readsDst(); |
| fDescInfo.fReadsFragPosition = colorPOI.readsFragPosition(); |
| } |
| |
| if (flags & GrXferProcessor::kClearCoverageStages_OptFlag) { |
| fDescInfo.fInputCoverageIsUsed = true; |
| *firstCoverageStageIdx = ds.numCoverageStages(); |
| fDescInfo.fHasVertexCoverage = false; |
| } else { |
| if (coveragePOI.readsDst()) { |
| fDescInfo.fReadsDst = true; |
| } |
| if (coveragePOI.readsFragPosition()) { |
| fDescInfo.fReadsFragPosition = true; |
| } |
| } |
| } |
| |
| void GrOptDrawState::finalize(GrGpu* gpu) { |
| gpu->buildProgramDesc(*this, fDescInfo, fDrawType, &fDesc); |
| fFinalized = true; |
| } |
| |
| //////////////////////////////////////////////////////////////////////////////// |
| |
| bool GrOptDrawState::operator== (const GrOptDrawState& that) const { |
| if (fDescInfo != that.fDescInfo) { |
| return false; |
| } |
| |
| if (!fDescInfo.fHasVertexColor && this->fColor != that.fColor) { |
| return false; |
| } |
| |
| if (this->getRenderTarget() != that.getRenderTarget() || |
| this->fFragmentStages.count() != that.fFragmentStages.count() || |
| this->fNumColorStages != that.fNumColorStages || |
| this->fScissorState != that.fScissorState || |
| !this->fViewMatrix.cheapEqualTo(that.fViewMatrix) || |
| this->fSrcBlend != that.fSrcBlend || |
| this->fDstBlend != that.fDstBlend || |
| this->fDrawType != that.fDrawType || |
| this->fBlendConstant != that.fBlendConstant || |
| this->fFlags != that.fFlags || |
| this->fStencilSettings != that.fStencilSettings || |
| this->fDrawFace != that.fDrawFace || |
| this->fDstCopy.texture() != that.fDstCopy.texture()) { |
| return false; |
| } |
| |
| if (!fDescInfo.fHasVertexCoverage && this->fCoverage != that.fCoverage) { |
| return false; |
| } |
| |
| if (this->hasGeometryProcessor()) { |
| if (!that.hasGeometryProcessor()) { |
| return false; |
| } else if (!this->getGeometryProcessor()->isEqual(*that.getGeometryProcessor())) { |
| return false; |
| } |
| } else if (that.hasGeometryProcessor()) { |
| 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; |
| } |
| |