| /* |
| * 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" |
| |
| GrOptDrawState::GrOptDrawState(const GrDrawState& drawState, |
| BlendOptFlags blendOptFlags, |
| GrBlendCoeff optSrcCoeff, |
| GrBlendCoeff optDstCoeff, |
| const GrDrawTargetCaps& caps) { |
| fRenderTarget.set(SkSafeRef(drawState.getRenderTarget()), |
| GrIORef::kWrite_IOType); |
| 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; |
| |
| memcpy(fFixedFunctionVertexAttribIndices, |
| drawState.getFixedFunctionVertexAttribIndices(), |
| sizeof(fFixedFunctionVertexAttribIndices)); |
| |
| |
| fInputColorIsUsed = true; |
| fInputCoverageIsUsed = true; |
| |
| if (drawState.hasGeometryProcessor()) { |
| fGeometryProcessor.reset(SkNEW_ARGS(GrGeometryStage, (*drawState.getGeometryProcessor()))); |
| } else { |
| fGeometryProcessor.reset(NULL); |
| } |
| |
| this->copyEffectiveColorStages(drawState); |
| this->copyEffectiveCoverageStages(drawState); |
| this->adjustFromBlendOpts(); |
| this->getStageStats(); |
| this->setOutputStateInfo(caps); |
| }; |
| |
| GrOptDrawState* GrOptDrawState::Create(const GrDrawState& drawState, const GrDrawTargetCaps& caps, |
| GrGpu::DrawType drawType) { |
| if (NULL == drawState.fCachedOptState || caps.getUniqueID() != drawState.fCachedCapsID) { |
| 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; |
| } |
| |
| drawState.fCachedOptState = SkNEW_ARGS(GrOptDrawState, (drawState, blendFlags, srcCoeff, |
| dstCoeff, caps)); |
| drawState.fCachedCapsID = caps.getUniqueID(); |
| } else { |
| #ifdef SK_DEBUG |
| GrBlendCoeff srcCoeff; |
| GrBlendCoeff dstCoeff; |
| BlendOptFlags blendFlags = (BlendOptFlags) drawState.getBlendOpts(false, |
| &srcCoeff, |
| &dstCoeff); |
| SkASSERT(GrOptDrawState(drawState, blendFlags, srcCoeff, dstCoeff, caps) == |
| *drawState.fCachedOptState); |
| #endif |
| } |
| drawState.fCachedOptState->ref(); |
| return drawState.fCachedOptState; |
| } |
| |
| void GrOptDrawState::setOutputStateInfo(const GrDrawTargetCaps& caps) { |
| // Set this default and then possibly change our mind if there is coverage. |
| fPrimaryOutputType = kModulate_PrimaryOutputType; |
| fSecondaryOutputType = kNone_SecondaryOutputType; |
| |
| // If we do have coverage determine whether it matters. |
| bool separateCoverageFromColor = this->hasGeometryProcessor(); |
| if (!this->isCoverageDrawing() && |
| (this->numCoverageStages() > 0 || |
| this->hasGeometryProcessor() || |
| this->hasCoverageVertexAttribute())) { |
| |
| if (caps.dualSourceBlendingSupport()) { |
| if (kZero_GrBlendCoeff == fDstBlend) { |
| // write the coverage value to second color |
| fSecondaryOutputType = kCoverage_SecondaryOutputType; |
| separateCoverageFromColor = true; |
| fDstBlend = (GrBlendCoeff)GrGpu::kIS2C_GrBlendCoeff; |
| } else if (kSA_GrBlendCoeff == fDstBlend) { |
| // SA dst coeff becomes 1-(1-SA)*coverage when dst is partially covered. |
| fSecondaryOutputType = kCoverageISA_SecondaryOutputType; |
| separateCoverageFromColor = true; |
| fDstBlend = (GrBlendCoeff)GrGpu::kIS2C_GrBlendCoeff; |
| } else if (kSC_GrBlendCoeff == fDstBlend) { |
| // SA dst coeff becomes 1-(1-SA)*coverage when dst is partially covered. |
| fSecondaryOutputType = kCoverageISC_SecondaryOutputType; |
| separateCoverageFromColor = true; |
| fDstBlend = (GrBlendCoeff)GrGpu::kIS2C_GrBlendCoeff; |
| } |
| } else if (fReadsDst && |
| kOne_GrBlendCoeff == fSrcBlend && |
| kZero_GrBlendCoeff == fDstBlend) { |
| fPrimaryOutputType = kCombineWithDst_PrimaryOutputType; |
| separateCoverageFromColor = true; |
| } |
| } |
| |
| // TODO: Once we have flag to know if we only multiply on stages, only push coverage into color |
| // stages if everything is multipy |
| if (!separateCoverageFromColor) { |
| for (int s = 0; s < this->numCoverageStages(); ++s) { |
| fColorStages.push_back(this->getCoverageStage(s)); |
| } |
| fCoverageStages.reset(); |
| } |
| } |
| |
| void GrOptDrawState::adjustFromBlendOpts() { |
| |
| switch (fBlendOptFlags) { |
| case kNone_BlendOpt: |
| case kSkipDraw_BlendOptFlag: |
| break; |
| case kCoverageAsAlpha_BlendOptFlag: |
| fFlagBits |= kCoverageDrawing_StateBit; |
| break; |
| case kEmitCoverage_BlendOptFlag: |
| fColor = 0xffffffff; |
| fInputColorIsUsed = true; |
| fColorStages.reset(); |
| this->removeFixedFunctionVertexAttribs(0x1 << kColor_GrVertexAttribBinding); |
| break; |
| case kEmitTransBlack_BlendOptFlag: |
| fColor = 0; |
| fCoverage = 0xff; |
| fInputColorIsUsed = true; |
| fInputCoverageIsUsed = true; |
| fColorStages.reset(); |
| fCoverageStages.reset(); |
| this->removeFixedFunctionVertexAttribs(0x1 << kColor_GrVertexAttribBinding | |
| 0x1 << kCoverage_GrVertexAttribBinding); |
| break; |
| default: |
| SkFAIL("Unknown BlendOptFlag"); |
| |
| } |
| } |
| |
| void GrOptDrawState::removeFixedFunctionVertexAttribs(uint8_t removeVAFlag) { |
| 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 != 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 != fFixedFunctionVertexAttribIndices[currAttrib.fBinding]); |
| fFixedFunctionVertexAttribIndices[currAttrib.fBinding] = -1; |
| continue; |
| } |
| fFixedFunctionVertexAttribIndices[currAttrib.fBinding] = newIdx; |
| } |
| memcpy(dst, src, sizeof(GrVertexAttrib)); |
| ++newIdx; |
| ++dst; |
| } |
| fVACount -= numToRemove; |
| fVAPtr = fOptVA.get(); |
| } |
| |
| void GrOptDrawState::copyEffectiveColorStages(const GrDrawState& ds) { |
| int firstColorStage = 0; |
| |
| // Set up color and flags for ConstantColorComponent checks |
| GrProcessor::InvariantOutput inout; |
| inout.fIsSingleComponent = false; |
| if (!this->hasColorVertexAttribute()) { |
| inout.fColor = ds.getColor(); |
| inout.fValidFlags = kRGBA_GrColorComponentFlags; |
| } else { |
| if (ds.vertexColorsAreOpaque()) { |
| inout.fColor = 0xFF << GrColor_SHIFT_A; |
| inout.fValidFlags = kA_GrColorComponentFlag; |
| } else { |
| inout.fValidFlags = 0; |
| // not strictly necessary but we get false alarms from tools about uninit. |
| inout.fColor = 0; |
| } |
| } |
| |
| for (int i = 0; i < ds.numColorStages(); ++i) { |
| const GrFragmentProcessor* fp = ds.getColorStage(i).getProcessor(); |
| if (!fp->willUseInputColor()) { |
| firstColorStage = i; |
| fInputColorIsUsed = false; |
| } |
| fp->computeInvariantOutput(&inout); |
| if (kRGBA_GrColorComponentFlags == inout.fValidFlags) { |
| firstColorStage = i + 1; |
| fColor = inout.fColor; |
| fInputColorIsUsed = true; |
| this->removeFixedFunctionVertexAttribs(0x1 << kColor_GrVertexAttribBinding); |
| } |
| } |
| if (firstColorStage < ds.numColorStages()) { |
| fColorStages.reset(&ds.getColorStage(firstColorStage), |
| ds.numColorStages() - firstColorStage); |
| } else { |
| fColorStages.reset(); |
| } |
| } |
| |
| void GrOptDrawState::copyEffectiveCoverageStages(const GrDrawState& ds) { |
| int firstCoverageStage = 0; |
| |
| // 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 |
| for (int i = 0; i < ds.numCoverageStages(); ++i) { |
| const GrProcessor* processor = ds.getCoverageStage(i).getProcessor(); |
| if (!processor->willUseInputColor()) { |
| firstCoverageStage = i; |
| fInputCoverageIsUsed = false; |
| } |
| } |
| #endif |
| if (ds.numCoverageStages() > 0) { |
| fCoverageStages.reset(&ds.getCoverageStage(firstCoverageStage), |
| ds.numCoverageStages() - firstCoverageStage); |
| } else { |
| fCoverageStages.reset(); |
| } |
| } |
| |
| 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() { |
| // We will need a local coord attrib if there is one currently set on the optState and we are |
| // actually generating some effect code |
| fRequiresLocalCoordAttrib = this->hasLocalCoordAttribute() && this->numTotalStages() > 0; |
| |
| fReadsDst = false; |
| fReadsFragPosition = false; |
| |
| for (int s = 0; s < this->numColorStages(); ++s) { |
| const GrFragmentStage& stage = this->getColorStage(s); |
| get_stage_stats(stage, &fReadsDst, &fReadsFragPosition); |
| } |
| for (int s = 0; s < this->numCoverageStages(); ++s) { |
| const GrFragmentStage& stage = this->getCoverageStage(s); |
| get_stage_stats(stage, &fReadsDst, &fReadsFragPosition); |
| } |
| if (this->hasGeometryProcessor()) { |
| const GrGeometryStage& stage = *this->getGeometryProcessor(); |
| fReadsFragPosition = fReadsFragPosition || stage.getProcessor()->willReadFragmentPosition(); |
| } |
| } |
| |
| //////////////////////////////////////////////////////////////////////////////// |
| |
| bool GrOptDrawState::operator== (const GrOptDrawState& that) const { |
| return this->isEqual(that); |
| } |
| |
| bool GrOptDrawState::isEqual(const GrOptDrawState& that) const { |
| bool usingVertexColors = this->hasColorVertexAttribute(); |
| if (!usingVertexColors && this->fColor != that.fColor) { |
| return false; |
| } |
| |
| if (this->getRenderTarget() != that.getRenderTarget() || |
| this->fColorStages.count() != that.fColorStages.count() || |
| this->fCoverageStages.count() != that.fCoverageStages.count() || |
| !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 || |
| this->fInputColorIsUsed != that.fInputColorIsUsed || |
| this->fInputCoverageIsUsed != that.fInputCoverageIsUsed || |
| this->fReadsDst != that.fReadsDst || |
| this->fReadsFragPosition != that.fReadsFragPosition || |
| this->fRequiresLocalCoordAttrib != that.fRequiresLocalCoordAttrib || |
| this->fPrimaryOutputType != that.fPrimaryOutputType || |
| this->fSecondaryOutputType != that.fSecondaryOutputType) { |
| return false; |
| } |
| |
| bool usingVertexCoverage = this->hasCoverageVertexAttribute(); |
| if (!usingVertexCoverage && this->fCoverage != that.fCoverage) { |
| return false; |
| } |
| |
| bool explicitLocalCoords = this->hasLocalCoordAttribute(); |
| if (this->hasGeometryProcessor()) { |
| if (!that.hasGeometryProcessor()) { |
| return false; |
| } else if (!GrProcessorStage::AreCompatible(*this->getGeometryProcessor(), |
| *that.getGeometryProcessor(), |
| explicitLocalCoords)) { |
| return false; |
| } |
| } else if (that.hasGeometryProcessor()) { |
| return false; |
| } |
| |
| for (int i = 0; i < this->numColorStages(); i++) { |
| if (!GrProcessorStage::AreCompatible(this->getColorStage(i), that.getColorStage(i), |
| explicitLocalCoords)) { |
| return false; |
| } |
| } |
| for (int i = 0; i < this->numCoverageStages(); i++) { |
| if (!GrProcessorStage::AreCompatible(this->getCoverageStage(i), that.getCoverageStage(i), |
| explicitLocalCoords)) { |
| return false; |
| } |
| } |
| |
| SkASSERT(0 == memcmp(this->fFixedFunctionVertexAttribIndices, |
| that.fFixedFunctionVertexAttribIndices, |
| sizeof(this->fFixedFunctionVertexAttribIndices))); |
| |
| return true; |
| } |
| |
