egdaniel | 3658f38 | 2014-09-15 07:01:59 -0700 | [diff] [blame] | 1 | /* |
| 2 | * Copyright 2014 Google Inc. |
| 3 | * |
| 4 | * Use of this source code is governed by a BSD-style license that can be |
| 5 | * found in the LICENSE file. |
| 6 | */ |
| 7 | |
| 8 | #include "GrOptDrawState.h" |
| 9 | |
| 10 | #include "GrDrawState.h" |
| 11 | |
egdaniel | 170f90b | 2014-09-16 12:54:40 -0700 | [diff] [blame] | 12 | GrOptDrawState::GrOptDrawState(const GrDrawState& drawState, |
| 13 | BlendOptFlags blendOptFlags, |
| 14 | GrBlendCoeff optSrcCoeff, |
| 15 | GrBlendCoeff optDstCoeff) : INHERITED(drawState) { |
egdaniel | 3658f38 | 2014-09-15 07:01:59 -0700 | [diff] [blame] | 16 | fColor = drawState.getColor(); |
| 17 | fCoverage = drawState.getCoverage(); |
| 18 | fViewMatrix = drawState.getViewMatrix(); |
| 19 | fBlendConstant = drawState.getBlendConstant(); |
| 20 | fFlagBits = drawState.getFlagBits(); |
| 21 | fVAPtr = drawState.getVertexAttribs(); |
| 22 | fVACount = drawState.getVertexAttribCount(); |
| 23 | fVAStride = drawState.getVertexStride(); |
| 24 | fStencilSettings = drawState.getStencil(); |
| 25 | fDrawFace = drawState.getDrawFace(); |
egdaniel | 170f90b | 2014-09-16 12:54:40 -0700 | [diff] [blame] | 26 | fBlendOptFlags = blendOptFlags; |
| 27 | fSrcBlend = optSrcCoeff; |
| 28 | fDstBlend = optDstCoeff; |
egdaniel | 3658f38 | 2014-09-15 07:01:59 -0700 | [diff] [blame] | 29 | |
| 30 | memcpy(fFixedFunctionVertexAttribIndices, |
| 31 | drawState.getFixedFunctionVertexAttribIndices(), |
| 32 | sizeof(fFixedFunctionVertexAttribIndices)); |
| 33 | |
egdaniel | 170f90b | 2014-09-16 12:54:40 -0700 | [diff] [blame] | 34 | |
egdaniel | 3658f38 | 2014-09-15 07:01:59 -0700 | [diff] [blame] | 35 | fInputColorIsUsed = true; |
| 36 | fInputCoverageIsUsed = true; |
| 37 | |
| 38 | if (drawState.hasGeometryProcessor()) { |
| 39 | fGeometryProcessor.reset(SkNEW_ARGS(GrEffectStage, (*drawState.getGeometryProcessor()))); |
| 40 | } else { |
| 41 | fGeometryProcessor.reset(NULL); |
| 42 | } |
| 43 | |
| 44 | this->copyEffectiveColorStages(drawState); |
| 45 | this->copyEffectiveCoverageStages(drawState); |
egdaniel | 170f90b | 2014-09-16 12:54:40 -0700 | [diff] [blame] | 46 | this->adjustFromBlendOpts(); |
egdaniel | a7dc0a8 | 2014-09-17 08:25:05 -0700 | [diff] [blame^] | 47 | this->getStageStats(); |
egdaniel | 3658f38 | 2014-09-15 07:01:59 -0700 | [diff] [blame] | 48 | }; |
| 49 | |
egdaniel | 170f90b | 2014-09-16 12:54:40 -0700 | [diff] [blame] | 50 | void GrOptDrawState::adjustFromBlendOpts() { |
| 51 | |
| 52 | switch (fBlendOptFlags) { |
| 53 | case kNone_BlendOpt: |
| 54 | case kSkipDraw_BlendOptFlag: |
| 55 | break; |
| 56 | case kCoverageAsAlpha_BlendOptFlag: |
| 57 | fFlagBits |= kCoverageDrawing_StateBit; |
| 58 | break; |
| 59 | case kEmitCoverage_BlendOptFlag: |
| 60 | fColor = 0xffffffff; |
| 61 | fInputColorIsUsed = true; |
| 62 | fColorStages.reset(); |
| 63 | this->removeFixedFunctionVertexAttribs(0x1 << kColor_GrVertexAttribBinding); |
| 64 | break; |
| 65 | case kEmitTransBlack_BlendOptFlag: |
| 66 | fColor = 0; |
| 67 | fCoverage = 0xff; |
| 68 | fInputColorIsUsed = true; |
| 69 | fInputCoverageIsUsed = true; |
| 70 | fColorStages.reset(); |
| 71 | fCoverageStages.reset(); |
| 72 | this->removeFixedFunctionVertexAttribs(0x1 << kColor_GrVertexAttribBinding | |
| 73 | 0x1 << kCoverage_GrVertexAttribBinding); |
| 74 | break; |
| 75 | default: |
| 76 | SkFAIL("Unknown BlendOptFlag"); |
| 77 | |
| 78 | } |
| 79 | } |
| 80 | |
egdaniel | 3658f38 | 2014-09-15 07:01:59 -0700 | [diff] [blame] | 81 | void GrOptDrawState::removeFixedFunctionVertexAttribs(uint8_t removeVAFlag) { |
| 82 | int numToRemove = 0; |
| 83 | uint8_t maskCheck = 0x1; |
| 84 | // Count the number of vertex attributes that we will actually remove |
| 85 | for (int i = 0; i < kGrFixedFunctionVertexAttribBindingCnt; ++i) { |
| 86 | if ((maskCheck & removeVAFlag) && -1 != fFixedFunctionVertexAttribIndices[i]) { |
| 87 | ++numToRemove; |
| 88 | } |
| 89 | maskCheck <<= 1; |
| 90 | } |
egdaniel | 170f90b | 2014-09-16 12:54:40 -0700 | [diff] [blame] | 91 | |
egdaniel | 3658f38 | 2014-09-15 07:01:59 -0700 | [diff] [blame] | 92 | fOptVA.reset(fVACount - numToRemove); |
| 93 | |
| 94 | GrVertexAttrib* dst = fOptVA.get(); |
| 95 | const GrVertexAttrib* src = fVAPtr; |
| 96 | |
| 97 | for (int i = 0, newIdx = 0; i < fVACount; ++i, ++src) { |
| 98 | const GrVertexAttrib& currAttrib = *src; |
| 99 | if (currAttrib.fBinding < kGrFixedFunctionVertexAttribBindingCnt) { |
| 100 | uint8_t maskCheck = 0x1 << currAttrib.fBinding; |
| 101 | if (maskCheck & removeVAFlag) { |
| 102 | SkASSERT(-1 != fFixedFunctionVertexAttribIndices[currAttrib.fBinding]); |
| 103 | fFixedFunctionVertexAttribIndices[currAttrib.fBinding] = -1; |
| 104 | continue; |
| 105 | } |
egdaniel | 170f90b | 2014-09-16 12:54:40 -0700 | [diff] [blame] | 106 | fFixedFunctionVertexAttribIndices[currAttrib.fBinding] = newIdx; |
egdaniel | 3658f38 | 2014-09-15 07:01:59 -0700 | [diff] [blame] | 107 | } |
| 108 | memcpy(dst, src, sizeof(GrVertexAttrib)); |
egdaniel | 3658f38 | 2014-09-15 07:01:59 -0700 | [diff] [blame] | 109 | ++newIdx; |
| 110 | ++dst; |
| 111 | } |
| 112 | fVACount -= numToRemove; |
| 113 | fVAPtr = fOptVA.get(); |
| 114 | } |
| 115 | |
| 116 | void GrOptDrawState::copyEffectiveColorStages(const GrDrawState& ds) { |
| 117 | int firstColorStage = 0; |
| 118 | |
| 119 | // Set up color and flags for ConstantColorComponent checks |
| 120 | GrColor color; |
| 121 | uint32_t validComponentFlags; |
| 122 | if (!this->hasColorVertexAttribute()) { |
| 123 | color = ds.getColor(); |
| 124 | validComponentFlags = kRGBA_GrColorComponentFlags; |
| 125 | } else { |
| 126 | if (ds.vertexColorsAreOpaque()) { |
| 127 | color = 0xFF << GrColor_SHIFT_A; |
| 128 | validComponentFlags = kA_GrColorComponentFlag; |
| 129 | } else { |
| 130 | validComponentFlags = 0; |
| 131 | color = 0; // not strictly necessary but we get false alarms from tools about uninit. |
| 132 | } |
| 133 | } |
| 134 | |
| 135 | for (int i = 0; i < ds.numColorStages(); ++i) { |
| 136 | const GrEffect* effect = ds.getColorStage(i).getEffect(); |
| 137 | if (!effect->willUseInputColor()) { |
| 138 | firstColorStage = i; |
| 139 | fInputColorIsUsed = false; |
| 140 | } |
| 141 | effect->getConstantColorComponents(&color, &validComponentFlags); |
| 142 | if (kRGBA_GrColorComponentFlags == validComponentFlags) { |
| 143 | firstColorStage = i + 1; |
| 144 | fColor = color; |
| 145 | fInputColorIsUsed = true; |
| 146 | this->removeFixedFunctionVertexAttribs(0x1 << kColor_GrVertexAttribBinding); |
| 147 | } |
| 148 | } |
| 149 | if (firstColorStage < ds.numColorStages()) { |
| 150 | fColorStages.reset(&ds.getColorStage(firstColorStage), |
| 151 | ds.numColorStages() - firstColorStage); |
| 152 | } else { |
| 153 | fColorStages.reset(); |
| 154 | } |
| 155 | } |
| 156 | |
| 157 | void GrOptDrawState::copyEffectiveCoverageStages(const GrDrawState& ds) { |
| 158 | int firstCoverageStage = 0; |
| 159 | |
| 160 | // We do not try to optimize out constantColor coverage effects here. It is extremely rare |
| 161 | // to have a coverage effect that returns a constant value for all four channels. Thus we |
| 162 | // save having to make extra virtual calls by not checking for it. |
| 163 | |
| 164 | // Don't do any optimizations on coverage stages. It should not be the case where we do not use |
| 165 | // input coverage in an effect |
| 166 | #ifdef OptCoverageStages |
| 167 | for (int i = 0; i < ds.numCoverageStages(); ++i) { |
| 168 | const GrEffect* effect = ds.getCoverageStage(i).getEffect(); |
| 169 | if (!effect->willUseInputColor()) { |
| 170 | firstCoverageStage = i; |
| 171 | fInputCoverageIsUsed = false; |
| 172 | } |
| 173 | } |
| 174 | #endif |
| 175 | if (ds.numCoverageStages() > 0) { |
| 176 | fCoverageStages.reset(&ds.getCoverageStage(firstCoverageStage), |
| 177 | ds.numCoverageStages() - firstCoverageStage); |
| 178 | } else { |
| 179 | fCoverageStages.reset(); |
| 180 | } |
| 181 | } |
| 182 | |
egdaniel | a7dc0a8 | 2014-09-17 08:25:05 -0700 | [diff] [blame^] | 183 | static void get_stage_stats(const GrEffectStage& stage, bool* readsDst, bool* readsFragPosition) { |
| 184 | if (stage.getEffect()->willReadDstColor()) { |
| 185 | *readsDst = true; |
| 186 | } |
| 187 | if (stage.getEffect()->willReadFragmentPosition()) { |
| 188 | *readsFragPosition = true; |
| 189 | } |
| 190 | } |
| 191 | void GrOptDrawState::getStageStats() { |
| 192 | // We will need a local coord attrib if there is one currently set on the optState and we are |
| 193 | // actually generating some effect code |
| 194 | fRequiresLocalCoordAttrib = this->hasLocalCoordAttribute() && this->numTotalStages() > 0; |
| 195 | |
| 196 | // if 1 == fVACount then that VA must be position, otherwise it contains some attribute which |
| 197 | // will require a vertexShader |
| 198 | fRequiresVertexShader = fVACount > 1; |
| 199 | |
| 200 | fReadsDst = false; |
| 201 | fReadsFragPosition = false; |
| 202 | |
| 203 | for (int s = 0; s < this->numColorStages(); ++s) { |
| 204 | const GrEffectStage& stage = this->getColorStage(s); |
| 205 | get_stage_stats(stage, &fReadsDst, &fReadsFragPosition); |
| 206 | } |
| 207 | for (int s = 0; s < this->numCoverageStages(); ++s) { |
| 208 | const GrEffectStage& stage = this->getCoverageStage(s); |
| 209 | get_stage_stats(stage, &fReadsDst, &fReadsFragPosition); |
| 210 | } |
| 211 | if (this->hasGeometryProcessor()) { |
| 212 | const GrEffectStage& stage = *this->getGeometryProcessor(); |
| 213 | get_stage_stats(stage, &fReadsDst, &fReadsFragPosition); |
| 214 | SkASSERT(fRequiresVertexShader); |
| 215 | } |
| 216 | } |
| 217 | |
egdaniel | 3658f38 | 2014-09-15 07:01:59 -0700 | [diff] [blame] | 218 | bool GrOptDrawState::operator== (const GrOptDrawState& that) const { |
| 219 | return this->isEqual(that); |
| 220 | } |
| 221 | |