| /* |
| * 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" |
| |
| GrOptDrawState::GrOptDrawState(const GrDrawState& drawState) : INHERITED(drawState) { |
| 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 = drawState.getDrawFace(); |
| |
| fBlendOptFlags = drawState.getBlendOpts(false, &fSrcBlend, &fDstBlend); |
| |
| memcpy(fFixedFunctionVertexAttribIndices, |
| drawState.getFixedFunctionVertexAttribIndices(), |
| sizeof(fFixedFunctionVertexAttribIndices)); |
| |
| fInputColorIsUsed = true; |
| fInputCoverageIsUsed = true; |
| |
| if (drawState.hasGeometryProcessor()) { |
| fGeometryProcessor.reset(SkNEW_ARGS(GrEffectStage, (*drawState.getGeometryProcessor()))); |
| } else { |
| fGeometryProcessor.reset(NULL); |
| } |
| |
| this->copyEffectiveColorStages(drawState); |
| this->copyEffectiveCoverageStages(drawState); |
| }; |
| |
| 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; |
| } |
| } |
| memcpy(dst, src, sizeof(GrVertexAttrib)); |
| fFixedFunctionVertexAttribIndices[currAttrib.fBinding] = newIdx; |
| ++newIdx; |
| ++dst; |
| } |
| fVACount -= numToRemove; |
| fVAPtr = fOptVA.get(); |
| } |
| |
| void GrOptDrawState::copyEffectiveColorStages(const GrDrawState& ds) { |
| int firstColorStage = 0; |
| |
| // Set up color and flags for ConstantColorComponent checks |
| GrColor color; |
| uint32_t validComponentFlags; |
| if (!this->hasColorVertexAttribute()) { |
| color = ds.getColor(); |
| validComponentFlags = kRGBA_GrColorComponentFlags; |
| } else { |
| if (ds.vertexColorsAreOpaque()) { |
| color = 0xFF << GrColor_SHIFT_A; |
| validComponentFlags = kA_GrColorComponentFlag; |
| } else { |
| validComponentFlags = 0; |
| color = 0; // not strictly necessary but we get false alarms from tools about uninit. |
| } |
| } |
| |
| for (int i = 0; i < ds.numColorStages(); ++i) { |
| const GrEffect* effect = ds.getColorStage(i).getEffect(); |
| if (!effect->willUseInputColor()) { |
| firstColorStage = i; |
| fInputColorIsUsed = false; |
| } |
| effect->getConstantColorComponents(&color, &validComponentFlags); |
| if (kRGBA_GrColorComponentFlags == validComponentFlags) { |
| firstColorStage = i + 1; |
| fColor = color; |
| 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 GrEffect* effect = ds.getCoverageStage(i).getEffect(); |
| if (!effect->willUseInputColor()) { |
| firstCoverageStage = i; |
| fInputCoverageIsUsed = false; |
| } |
| } |
| #endif |
| if (ds.numCoverageStages() > 0) { |
| fCoverageStages.reset(&ds.getCoverageStage(firstCoverageStage), |
| ds.numCoverageStages() - firstCoverageStage); |
| } else { |
| fCoverageStages.reset(); |
| } |
| } |
| |
| bool GrOptDrawState::operator== (const GrOptDrawState& that) const { |
| return this->isEqual(that); |
| } |
| |