| /* |
| * 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 "GrDefaultGeoProcFactory.h" |
| #include "GrDrawState.h" |
| #include "GrDrawTargetCaps.h" |
| #include "GrGpu.h" |
| #include "GrInvariantOutput.h" |
| |
| GrOptDrawState::GrOptDrawState(const GrDrawState& drawState, |
| BlendOptFlags blendOptFlags, |
| GrBlendCoeff optSrcCoeff, |
| GrBlendCoeff optDstCoeff, |
| GrGpu* gpu, |
| const GrDeviceCoordTexture* dstCopy, |
| GrGpu::DrawType drawType) { |
| fRenderTarget.set(SkSafeRef(drawState.getRenderTarget()), kWrite_GrIOType); |
| fColor = drawState.getColor(); |
| fCoverage = drawState.getCoverage(); |
| fViewMatrix = drawState.getViewMatrix(); |
| fBlendConstant = drawState.getBlendConstant(); |
| fFlagBits = drawState.getFlagBits(); |
| fVAPtr = drawState.getVertexAttribs(); |
| fVACount = drawState.getVertexAttribCount(); |
| fVAStride = drawState.getVertexStride(); |
| fStencilSettings = drawState.getStencil(); |
| fDrawFace = (DrawFace)drawState.getDrawFace(); |
| fBlendOptFlags = blendOptFlags; |
| fSrcBlend = optSrcCoeff; |
| fDstBlend = optDstCoeff; |
| GrProgramDesc::DescInfo descInfo; |
| |
| memcpy(descInfo.fFixedFunctionVertexAttribIndices, |
| drawState.getFixedFunctionVertexAttribIndices(), |
| sizeof(descInfo.fFixedFunctionVertexAttribIndices)); |
| |
| descInfo.fInputColorIsUsed = true; |
| descInfo.fInputCoverageIsUsed = true; |
| |
| int firstColorStageIdx = 0; |
| int firstCoverageStageIdx = 0; |
| |
| uint8_t fixedFunctionVAToRemove = 0; |
| |
| this->computeEffectiveColorStages(drawState, &descInfo, &firstColorStageIdx, |
| &fixedFunctionVAToRemove); |
| this->computeEffectiveCoverageStages(drawState, &descInfo, &firstCoverageStageIdx); |
| this->adjustFromBlendOpts(drawState, &descInfo, &firstColorStageIdx, &firstCoverageStageIdx, |
| &fixedFunctionVAToRemove); |
| // Should not be setting any more FFVA to be removed at this point |
| if (0 != fixedFunctionVAToRemove) { |
| this->removeFixedFunctionVertexAttribs(fixedFunctionVAToRemove, &descInfo); |
| } |
| this->getStageStats(drawState, firstColorStageIdx, firstCoverageStageIdx, &descInfo); |
| |
| // Copy GeometryProcesssor from DS or ODS |
| if (drawState.hasGeometryProcessor()) { |
| fGeometryProcessor.initAndRef(drawState.fGeometryProcessor); |
| } else if (!GrGpu::IsPathRenderingDrawType(drawType)) { |
| // Install default GP, this will be ignored if we are rendering with fragment shader only |
| // TODO(joshualitt) rendering code should do this |
| fGeometryProcessor.reset(GrDefaultGeoProcFactory::Create()); |
| } else { |
| fGeometryProcessor.reset(NULL); |
| } |
| |
| // Copy Color Stages from DS to ODS |
| if (firstColorStageIdx < drawState.numColorStages()) { |
| fFragmentStages.reset(&drawState.getColorStage(firstColorStageIdx), |
| drawState.numColorStages() - firstColorStageIdx); |
| } else { |
| fFragmentStages.reset(); |
| } |
| |
| fNumColorStages = fFragmentStages.count(); |
| |
| // Copy Coverage Stages from DS to ODS |
| if (firstCoverageStageIdx < drawState.numCoverageStages()) { |
| fFragmentStages.push_back_n(drawState.numCoverageStages() - firstCoverageStageIdx, |
| &drawState.getCoverageStage(firstCoverageStageIdx)); |
| } |
| |
| this->setOutputStateInfo(drawState, *gpu->caps(), &descInfo); |
| |
| // now create a key |
| gpu->buildProgramDesc(*this, descInfo, drawType, dstCopy, &fDesc); |
| }; |
| |
| GrOptDrawState* GrOptDrawState::Create(const GrDrawState& drawState, |
| GrGpu* gpu, |
| const GrDeviceCoordTexture* dstCopy, |
| GrGpu::DrawType drawType) { |
| GrBlendCoeff srcCoeff; |
| GrBlendCoeff dstCoeff; |
| BlendOptFlags blendFlags = (BlendOptFlags) drawState.getBlendOpts(false, |
| &srcCoeff, |
| &dstCoeff); |
| |
| // If our blend coeffs are set to 0,1 we know we will not end up drawing unless we are |
| // stenciling. 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 (kZero_GrBlendCoeff == srcCoeff && kOne_GrBlendCoeff == dstCoeff && |
| !drawState.getStencil().doesWrite() && GrGpu::kStencilPath_DrawType != drawType) { |
| return NULL; |
| } |
| |
| return SkNEW_ARGS(GrOptDrawState, (drawState, blendFlags, srcCoeff, |
| dstCoeff, gpu, dstCopy, drawType)); |
| } |
| |
| void GrOptDrawState::setOutputStateInfo(const GrDrawState& ds, |
| const GrDrawTargetCaps& caps, |
| GrProgramDesc::DescInfo* descInfo) { |
| // Set this default and then possibly change our mind if there is coverage. |
| descInfo->fPrimaryOutputType = GrProgramDesc::kModulate_PrimaryOutputType; |
| descInfo->fSecondaryOutputType = GrProgramDesc::kNone_SecondaryOutputType; |
| |
| // If we do have coverage determine whether it matters. Dual source blending is expensive so |
| // we don't do it if we are doing coverage drawing. If we aren't then We always do dual source |
| // blending if we have any effective coverage stages OR the geometry processor doesn't emits |
| // solid coverage. |
| // TODO move the gp logic into the GP base class |
| if (!this->isCoverageDrawing() && !ds.hasSolidCoverage()) { |
| if (caps.dualSourceBlendingSupport()) { |
| if (kZero_GrBlendCoeff == fDstBlend) { |
| // write the coverage value to second color |
| descInfo->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. |
| descInfo->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. |
| descInfo->fSecondaryOutputType = GrProgramDesc::kCoverageISC_SecondaryOutputType; |
| fDstBlend = (GrBlendCoeff)GrGpu::kIS2C_GrBlendCoeff; |
| } |
| } else if (descInfo->fReadsDst && |
| kOne_GrBlendCoeff == fSrcBlend && |
| kZero_GrBlendCoeff == fDstBlend) { |
| descInfo->fPrimaryOutputType = GrProgramDesc::kCombineWithDst_PrimaryOutputType; |
| } |
| } |
| } |
| |
| void GrOptDrawState::adjustFromBlendOpts(const GrDrawState& ds, |
| GrProgramDesc::DescInfo* descInfo, |
| int* firstColorStageIdx, |
| int* firstCoverageStageIdx, |
| uint8_t* fixedFunctionVAToRemove) { |
| switch (fBlendOptFlags) { |
| case kNone_BlendOpt: |
| case kSkipDraw_BlendOptFlag: |
| break; |
| case kCoverageAsAlpha_BlendOptFlag: |
| fFlagBits |= kCoverageDrawing_StateBit; |
| break; |
| case kEmitCoverage_BlendOptFlag: |
| fColor = 0xffffffff; |
| descInfo->fInputColorIsUsed = true; |
| *firstColorStageIdx = ds.numColorStages(); |
| *fixedFunctionVAToRemove |= 0x1 << kColor_GrVertexAttribBinding; |
| break; |
| case kEmitTransBlack_BlendOptFlag: |
| fColor = 0; |
| fCoverage = 0xff; |
| descInfo->fInputColorIsUsed = true; |
| descInfo->fInputCoverageIsUsed = true; |
| *firstColorStageIdx = ds.numColorStages(); |
| *firstCoverageStageIdx = ds.numCoverageStages(); |
| *fixedFunctionVAToRemove |= (0x1 << kColor_GrVertexAttribBinding | |
| 0x1 << kCoverage_GrVertexAttribBinding); |
| break; |
| default: |
| SkFAIL("Unknown BlendOptFlag"); |
| } |
| } |
| |
| void GrOptDrawState::removeFixedFunctionVertexAttribs(uint8_t removeVAFlag, |
| GrProgramDesc::DescInfo* descInfo) { |
| int numToRemove = 0; |
| uint8_t maskCheck = 0x1; |
| // Count the number of vertex attributes that we will actually remove |
| for (int i = 0; i < kGrFixedFunctionVertexAttribBindingCnt; ++i) { |
| if ((maskCheck & removeVAFlag) && -1 != descInfo->fFixedFunctionVertexAttribIndices[i]) { |
| ++numToRemove; |
| } |
| maskCheck <<= 1; |
| } |
| |
| fOptVA.reset(fVACount - numToRemove); |
| |
| GrVertexAttrib* dst = fOptVA.get(); |
| const GrVertexAttrib* src = fVAPtr; |
| |
| for (int i = 0, newIdx = 0; i < fVACount; ++i, ++src) { |
| const GrVertexAttrib& currAttrib = *src; |
| if (currAttrib.fBinding < kGrFixedFunctionVertexAttribBindingCnt) { |
| uint8_t maskCheck = 0x1 << currAttrib.fBinding; |
| if (maskCheck & removeVAFlag) { |
| SkASSERT(-1 != descInfo->fFixedFunctionVertexAttribIndices[currAttrib.fBinding]); |
| descInfo->fFixedFunctionVertexAttribIndices[currAttrib.fBinding] = -1; |
| continue; |
| } |
| descInfo->fFixedFunctionVertexAttribIndices[currAttrib.fBinding] = newIdx; |
| } |
| memcpy(dst, src, sizeof(GrVertexAttrib)); |
| ++newIdx; |
| ++dst; |
| } |
| fVACount -= numToRemove; |
| fVAPtr = fOptVA.get(); |
| } |
| |
| void GrOptDrawState::computeEffectiveColorStages(const GrDrawState& ds, |
| GrProgramDesc::DescInfo* descInfo, |
| int* firstColorStageIdx, |
| uint8_t* fixedFunctionVAToRemove) { |
| // Set up color and flags for ConstantColorComponent checks |
| GrColor color; |
| GrColorComponentFlags flags; |
| if (!descInfo->hasColorVertexAttribute()) { |
| color = ds.getColor(); |
| flags = kRGBA_GrColorComponentFlags; |
| } else { |
| if (ds.vertexColorsAreOpaque()) { |
| color = 0xFF << GrColor_SHIFT_A; |
| flags = kA_GrColorComponentFlag; |
| } else { |
| flags = static_cast<GrColorComponentFlags>(0); |
| // not strictly necessary but we get false alarms from tools about uninit. |
| color = 0; |
| } |
| } |
| GrInvariantOutput inout(color, flags, false); |
| |
| for (int i = 0; i < ds.numColorStages(); ++i) { |
| const GrFragmentProcessor* fp = ds.getColorStage(i).getProcessor(); |
| fp->computeInvariantOutput(&inout); |
| if (!inout.willUseInputColor()) { |
| *firstColorStageIdx = i; |
| descInfo->fInputColorIsUsed = false; |
| } |
| if (kRGBA_GrColorComponentFlags == inout.validFlags()) { |
| *firstColorStageIdx = i + 1; |
| fColor = inout.color(); |
| descInfo->fInputColorIsUsed = true; |
| *fixedFunctionVAToRemove |= 0x1 << kColor_GrVertexAttribBinding; |
| // 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. |
| inout.resetNonMulStageFound(); |
| } |
| } |
| } |
| |
| void GrOptDrawState::computeEffectiveCoverageStages(const GrDrawState& ds, |
| GrProgramDesc::DescInfo* descInfo, |
| int* firstCoverageStageIdx) { |
| // We do not try to optimize out constantColor coverage effects here. It is extremely rare |
| // to have a coverage effect that returns a constant value for all four channels. Thus we |
| // save having to make extra virtual calls by not checking for it. |
| |
| // Don't do any optimizations on coverage stages. It should not be the case where we do not use |
| // input coverage in an effect |
| #ifdef OptCoverageStages |
| GrInvariantOutput inout; |
| for (int i = 0; i < ds.numCoverageStages(); ++i) { |
| const GrFragmentProcessor* fp = ds.getCoverageStage(i).getProcessor(); |
| fp->computeInvariantOutput(&inout); |
| if (!inout.fWillUseInputColor) { |
| *firstCoverageStageIdx = i; |
| descInfo->fInputCoverageIsUsed = false; |
| } |
| } |
| #endif |
| } |
| |
| static void get_stage_stats(const GrFragmentStage& stage, bool* readsDst, bool* readsFragPosition) { |
| if (stage.getProcessor()->willReadDstColor()) { |
| *readsDst = true; |
| } |
| if (stage.getProcessor()->willReadFragmentPosition()) { |
| *readsFragPosition = true; |
| } |
| } |
| |
| void GrOptDrawState::getStageStats(const GrDrawState& ds, int firstColorStageIdx, |
| int firstCoverageStageIdx, GrProgramDesc::DescInfo* descInfo) { |
| // We will need a local coord attrib if there is one currently set on the optState and we are |
| // actually generating some effect code |
| descInfo->fRequiresLocalCoordAttrib = descInfo->hasLocalCoordAttribute() && |
| ds.numTotalStages() - firstColorStageIdx - firstCoverageStageIdx > 0; |
| |
| descInfo->fReadsDst = false; |
| descInfo->fReadsFragPosition = false; |
| |
| for (int s = firstColorStageIdx; s < ds.numColorStages(); ++s) { |
| const GrFragmentStage& stage = ds.getColorStage(s); |
| get_stage_stats(stage, &descInfo->fReadsDst, &descInfo->fReadsFragPosition); |
| } |
| for (int s = firstCoverageStageIdx; s < ds.numCoverageStages(); ++s) { |
| const GrFragmentStage& stage = ds.getCoverageStage(s); |
| get_stage_stats(stage, &descInfo->fReadsDst, &descInfo->fReadsFragPosition); |
| } |
| if (ds.hasGeometryProcessor()) { |
| const GrGeometryProcessor& gp = *ds.getGeometryProcessor(); |
| descInfo->fReadsFragPosition = descInfo->fReadsFragPosition || gp.willReadFragmentPosition(); |
| } |
| } |
| |
| //////////////////////////////////////////////////////////////////////////////// |
| |
| bool GrOptDrawState::operator== (const GrOptDrawState& that) const { |
| return this->isEqual(that); |
| } |
| |
| bool GrOptDrawState::isEqual(const GrOptDrawState& that) const { |
| if (this->fDesc != that.fDesc) { |
| return false; |
| } |
| bool usingVertexColors = that.fDesc.header().fColorAttributeIndex != -1; |
| if (!usingVertexColors && this->fColor != that.fColor) { |
| return false; |
| } |
| |
| if (this->getRenderTarget() != that.getRenderTarget() || |
| !this->fViewMatrix.cheapEqualTo(that.fViewMatrix) || |
| this->fSrcBlend != that.fSrcBlend || |
| this->fDstBlend != that.fDstBlend || |
| this->fBlendConstant != that.fBlendConstant || |
| this->fFlagBits != that.fFlagBits || |
| this->fVACount != that.fVACount || |
| this->fVAStride != that.fVAStride || |
| memcmp(this->fVAPtr, that.fVAPtr, this->fVACount * sizeof(GrVertexAttrib)) || |
| this->fStencilSettings != that.fStencilSettings || |
| this->fDrawFace != that.fDrawFace) { |
| return false; |
| } |
| |
| bool usingVertexCoverage = this->fDesc.header().fCoverageAttributeIndex != -1; |
| if (!usingVertexCoverage && 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; |
| } |
| |
| bool explicitLocalCoords = this->fDesc.header().fLocalCoordAttributeIndex != -1; |
| for (int i = 0; i < this->numFragmentStages(); i++) { |
| if (!GrFragmentStage::AreCompatible(this->getFragmentStage(i), that.getFragmentStage(i), |
| explicitLocalCoords)) { |
| return false; |
| } |
| } |
| return true; |
| } |
| |
