OLD | NEW |
(Empty) | |
| 1 |
| 2 /* |
| 3 * Copyright 2014 Google Inc. |
| 4 * |
| 5 * Use of this source code is governed by a BSD-style license that can be |
| 6 * found in the LICENSE file. |
| 7 */ |
| 8 |
| 9 #include "effects/GrCoverageSetOpXP.h" |
| 10 #include "GrColor.h" |
| 11 #include "GrDrawTargetCaps.h" |
| 12 #include "GrInvariantOutput.h" |
| 13 #include "GrProcessor.h" |
| 14 #include "GrProcOptInfo.h" |
| 15 #include "gl/GrGLXferProcessor.h" |
| 16 #include "gl/builders/GrGLFragmentShaderBuilder.h" |
| 17 #include "gl/builders/GrGLProgramBuilder.h" |
| 18 |
| 19 class GrGLCoverageSetOpXP : public GrGLXferProcessor { |
| 20 public: |
| 21 GrGLCoverageSetOpXP(const GrProcessor&) {} |
| 22 |
| 23 ~GrGLCoverageSetOpXP() SK_OVERRIDE {} |
| 24 |
| 25 void emitCode(const EmitArgs& args) SK_OVERRIDE { |
| 26 const GrCoverageSetOpXP& xp = args.fXP.cast<GrCoverageSetOpXP>(); |
| 27 GrGLFPFragmentBuilder* fsBuilder = args.fPB->getFragmentShaderBuilder(); |
| 28 |
| 29 if (xp.invertCoverage()) { |
| 30 fsBuilder->codeAppendf("%s = 1.0 - %s;", args.fOutputPrimary, args.f
InputCoverage); |
| 31 } else { |
| 32 fsBuilder->codeAppendf("%s = %s;", args.fOutputPrimary, args.fInputC
overage); |
| 33 } |
| 34 } |
| 35 |
| 36 void setData(const GrGLProgramDataManager&, const GrXferProcessor&) SK_OVERR
IDE {}; |
| 37 |
| 38 static void GenKey(const GrProcessor& processor, const GrGLCaps& caps, |
| 39 GrProcessorKeyBuilder* b) { |
| 40 const GrCoverageSetOpXP& xp = processor.cast<GrCoverageSetOpXP>(); |
| 41 uint32_t key = xp.invertCoverage() ? 0x0 : 0x1; |
| 42 b->add32(key); |
| 43 }; |
| 44 |
| 45 private: |
| 46 typedef GrGLXferProcessor INHERITED; |
| 47 }; |
| 48 |
| 49 /////////////////////////////////////////////////////////////////////////////// |
| 50 |
| 51 GrCoverageSetOpXP::GrCoverageSetOpXP(SkRegion::Op regionOp, bool invertCoverage) |
| 52 : fRegionOp(regionOp) |
| 53 , fInvertCoverage(invertCoverage) { |
| 54 this->initClassID<GrCoverageSetOpXP>(); |
| 55 } |
| 56 |
| 57 GrCoverageSetOpXP::~GrCoverageSetOpXP() { |
| 58 } |
| 59 |
| 60 void GrCoverageSetOpXP::getGLProcessorKey(const GrGLCaps& caps, GrProcessorKeyBu
ilder* b) const { |
| 61 GrGLCoverageSetOpXP::GenKey(*this, caps, b); |
| 62 } |
| 63 |
| 64 GrGLXferProcessor* GrCoverageSetOpXP::createGLInstance() const { |
| 65 return SkNEW_ARGS(GrGLCoverageSetOpXP, (*this)); |
| 66 } |
| 67 |
| 68 GrXferProcessor::OptFlags |
| 69 GrCoverageSetOpXP::getOptimizations(const GrProcOptInfo& colorPOI, |
| 70 const GrProcOptInfo& coveragePOI, |
| 71 bool colorWriteDisabled, |
| 72 bool doesStencilWrite, |
| 73 GrColor* color, |
| 74 const GrDrawTargetCaps& caps) { |
| 75 // We never look at the color input |
| 76 return GrXferProcessor::kIgnoreColor_OptFlag; |
| 77 } |
| 78 |
| 79 void GrCoverageSetOpXP::getBlendInfo(GrXferProcessor::BlendInfo* blendInfo) cons
t { |
| 80 switch (fRegionOp) { |
| 81 case SkRegion::kReplace_Op: |
| 82 blendInfo->fSrcBlend = kOne_GrBlendCoeff; |
| 83 blendInfo->fDstBlend = kZero_GrBlendCoeff; |
| 84 break; |
| 85 case SkRegion::kIntersect_Op: |
| 86 blendInfo->fSrcBlend = kDC_GrBlendCoeff; |
| 87 blendInfo->fDstBlend = kZero_GrBlendCoeff; |
| 88 break; |
| 89 case SkRegion::kUnion_Op: |
| 90 blendInfo->fSrcBlend = kOne_GrBlendCoeff; |
| 91 blendInfo->fDstBlend = kISC_GrBlendCoeff; |
| 92 break; |
| 93 case SkRegion::kXOR_Op: |
| 94 blendInfo->fSrcBlend = kIDC_GrBlendCoeff; |
| 95 blendInfo->fDstBlend = kISC_GrBlendCoeff; |
| 96 break; |
| 97 case SkRegion::kDifference_Op: |
| 98 blendInfo->fSrcBlend = kZero_GrBlendCoeff; |
| 99 blendInfo->fDstBlend = kISC_GrBlendCoeff; |
| 100 break; |
| 101 case SkRegion::kReverseDifference_Op: |
| 102 blendInfo->fSrcBlend = kIDC_GrBlendCoeff; |
| 103 blendInfo->fDstBlend = kZero_GrBlendCoeff; |
| 104 break; |
| 105 } |
| 106 blendInfo->fBlendConstant = 0; |
| 107 } |
| 108 |
| 109 /////////////////////////////////////////////////////////////////////////////// |
| 110 |
| 111 GrCoverageSetOpXPFactory::GrCoverageSetOpXPFactory(SkRegion::Op regionOp, bool i
nvertCoverage) |
| 112 : fRegionOp(regionOp) |
| 113 , fInvertCoverage(invertCoverage) { |
| 114 this->initClassID<GrCoverageSetOpXPFactory>(); |
| 115 } |
| 116 |
| 117 GrXPFactory* GrCoverageSetOpXPFactory::Create(SkRegion::Op regionOp, bool invert
Coverage) { |
| 118 switch (regionOp) { |
| 119 case SkRegion::kReplace_Op: { |
| 120 if (invertCoverage) { |
| 121 static GrCoverageSetOpXPFactory gReplaceCDXPFI(regionOp, invertC
overage); |
| 122 return SkRef(&gReplaceCDXPFI); |
| 123 } else { |
| 124 static GrCoverageSetOpXPFactory gReplaceCDXPF(regionOp, invertCo
verage); |
| 125 return SkRef(&gReplaceCDXPF); |
| 126 } |
| 127 break; |
| 128 } |
| 129 case SkRegion::kIntersect_Op: { |
| 130 if (invertCoverage) { |
| 131 static GrCoverageSetOpXPFactory gIntersectCDXPFI(regionOp, inver
tCoverage); |
| 132 return SkRef(&gIntersectCDXPFI); |
| 133 } else { |
| 134 static GrCoverageSetOpXPFactory gIntersectCDXPF(regionOp, invert
Coverage); |
| 135 return SkRef(&gIntersectCDXPF); |
| 136 } |
| 137 break; |
| 138 } |
| 139 case SkRegion::kUnion_Op: { |
| 140 if (invertCoverage) { |
| 141 static GrCoverageSetOpXPFactory gUnionCDXPFI(regionOp, invertCov
erage); |
| 142 return SkRef(&gUnionCDXPFI); |
| 143 } else { |
| 144 static GrCoverageSetOpXPFactory gUnionCDXPF(regionOp, invertCove
rage); |
| 145 return SkRef(&gUnionCDXPF); |
| 146 } |
| 147 break; |
| 148 } |
| 149 case SkRegion::kXOR_Op: { |
| 150 if (invertCoverage) { |
| 151 static GrCoverageSetOpXPFactory gXORCDXPFI(regionOp, invertCover
age); |
| 152 return SkRef(&gXORCDXPFI); |
| 153 } else { |
| 154 static GrCoverageSetOpXPFactory gXORCDXPF(regionOp, invertCovera
ge); |
| 155 return SkRef(&gXORCDXPF); |
| 156 } |
| 157 break; |
| 158 } |
| 159 case SkRegion::kDifference_Op: { |
| 160 if (invertCoverage) { |
| 161 static GrCoverageSetOpXPFactory gDifferenceCDXPFI(regionOp, inve
rtCoverage); |
| 162 return SkRef(&gDifferenceCDXPFI); |
| 163 } else { |
| 164 static GrCoverageSetOpXPFactory gDifferenceCDXPF(regionOp, inver
tCoverage); |
| 165 return SkRef(&gDifferenceCDXPF); |
| 166 } |
| 167 break; |
| 168 } |
| 169 case SkRegion::kReverseDifference_Op: { |
| 170 if (invertCoverage) { |
| 171 static GrCoverageSetOpXPFactory gRevDiffCDXPFI(regionOp, invertC
overage); |
| 172 return SkRef(&gRevDiffCDXPFI); |
| 173 } else { |
| 174 static GrCoverageSetOpXPFactory gRevDiffCDXPF(regionOp, invertCo
verage); |
| 175 return SkRef(&gRevDiffCDXPF); |
| 176 } |
| 177 break; |
| 178 } |
| 179 default: |
| 180 return NULL; |
| 181 } |
| 182 } |
| 183 |
| 184 GrXferProcessor* GrCoverageSetOpXPFactory::createXferProcessor(const GrProcOptIn
fo& /* colorPOI*/, |
| 185 const GrProcOptIn
fo& covPOI) const { |
| 186 return GrCoverageSetOpXP::Create(fRegionOp, fInvertCoverage); |
| 187 } |
| 188 |
| 189 bool GrCoverageSetOpXPFactory::willBlendWithDst(const GrProcOptInfo& colorPOI, |
| 190 const GrProcOptInfo& coveragePOI
, |
| 191 bool colorWriteDisabled) const { |
| 192 // TODO: once all SkXferEffects are XP's then we will never reads dst here s
ince only XP's |
| 193 // will readDst and this XP doesn't read dst. |
| 194 if (coveragePOI.readsDst()) { |
| 195 return true; |
| 196 } |
| 197 |
| 198 // Besides Replace all other SkRegion ops will either have a src coeff that
references dst or a |
| 199 // non zero dst coeff |
| 200 return SkRegion::kReplace_Op != fRegionOp; |
| 201 } |
| 202 |
| 203 bool GrCoverageSetOpXPFactory::getOpaqueAndKnownColor(const GrProcOptInfo& color
POI, |
| 204 const GrProcOptInfo& cover
agePOI, |
| 205 GrColor* solidColor, |
| 206 uint32_t* solidColorKnownC
omponents) const { |
| 207 if (!coveragePOI.isSolidWhite()) { |
| 208 return false; |
| 209 } |
| 210 |
| 211 SkASSERT((NULL == solidColor) == (NULL == solidColorKnownComponents)); |
| 212 |
| 213 bool opaque = SkRegion::kReplace_Op == fRegionOp; |
| 214 if (solidColor) { |
| 215 if (opaque) { |
| 216 *solidColor = GrColor_WHITE; |
| 217 *solidColorKnownComponents = kRGBA_GrColorComponentFlags; |
| 218 } else { |
| 219 solidColorKnownComponents = 0; |
| 220 } |
| 221 } |
| 222 return opaque; |
| 223 } |
| 224 |
| 225 GR_DEFINE_XP_FACTORY_TEST(GrCoverageSetOpXPFactory); |
| 226 |
| 227 GrXPFactory* GrCoverageSetOpXPFactory::TestCreate(SkRandom* random, |
| 228 GrContext*, |
| 229 const GrDrawTargetCaps&, |
| 230 GrTexture*[]) { |
| 231 SkRegion::Op regionOp = SkRegion::Op(random->nextULessThan(SkRegion::kLastOp
+ 1)); |
| 232 bool invertCoverage = random->nextBool(); |
| 233 return GrCoverageSetOpXPFactory::Create(regionOp, invertCoverage); |
| 234 } |
| 235 |
OLD | NEW |