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| 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 "GrGeometryProcessor.h" |
| 9 |
| 10 #include "gl/GrGLGeometryProcessor.h" |
| 11 #include "GrInvariantOutput.h" |
| 12 |
| 13 ////////////////////////////////////////////////////////////////////////////////
/////////////////// |
| 14 |
| 15 void GrGeometryProcessor::getInvariantOutputColor(GrInitInvariantOutput* out) co
nst { |
| 16 if (fHasVertexColor) { |
| 17 if (fOpaqueVertexColors) { |
| 18 out->setUnknownOpaqueFourComponents(); |
| 19 } else { |
| 20 out->setUnknownFourComponents(); |
| 21 } |
| 22 } else { |
| 23 out->setKnownFourComponents(fColor); |
| 24 } |
| 25 this->onGetInvariantOutputColor(out); |
| 26 } |
| 27 |
| 28 void GrGeometryProcessor::getInvariantOutputCoverage(GrInitInvariantOutput* out)
const { |
| 29 this->onGetInvariantOutputCoverage(out); |
| 30 } |
| 31 |
| 32 ////////////////////////////////////////////////////////////////////////////////
/////////////////// |
| 33 |
| 34 #include "gl/builders/GrGLProgramBuilder.h" |
| 35 |
| 36 void GrGLGeometryProcessor::setupColorPassThrough(GrGLGPBuilder* pb, |
| 37 GrGPInput inputType, |
| 38 const char* outputName, |
| 39 const GrGeometryProcessor::GrA
ttribute* colorAttr, |
| 40 UniformHandle* colorUniform) { |
| 41 GrGLGPFragmentBuilder* fs = pb->getFragmentShaderBuilder(); |
| 42 if (kUniform_GrGPInput == inputType) { |
| 43 SkASSERT(colorUniform); |
| 44 const char* stagedLocalVarName; |
| 45 *colorUniform = pb->addUniform(GrGLProgramBuilder::kFragment_Visibility, |
| 46 kVec4f_GrSLType, |
| 47 kDefault_GrSLPrecision, |
| 48 "Color", |
| 49 &stagedLocalVarName); |
| 50 fs->codeAppendf("%s = %s;", outputName, stagedLocalVarName); |
| 51 } else if (kAttribute_GrGPInput == inputType) { |
| 52 SkASSERT(colorAttr); |
| 53 pb->addPassThroughAttribute(colorAttr, outputName); |
| 54 } else if (kAllOnes_GrGPInput == inputType) { |
| 55 fs->codeAppendf("%s = vec4(1);", outputName); |
| 56 } |
| 57 } |
| 58 |
| 59 ////////////////////////////////////////////////////////////////////////////////
/////////////////// |
| 60 |
| 61 struct PathBatchTracker { |
| 62 GrGPInput fInputColorType; |
| 63 GrGPInput fInputCoverageType; |
| 64 GrColor fColor; |
| 65 }; |
| 66 |
| 67 class GrGLPathProcessor : public GrGLGeometryProcessor { |
| 68 public: |
| 69 GrGLPathProcessor(const GrPathProcessor&, const GrBatchTracker&) |
| 70 : fColor(GrColor_ILLEGAL) {} |
| 71 |
| 72 void emitCode(const EmitArgs& args) SK_OVERRIDE { |
| 73 GrGLGPBuilder* pb = args.fPB; |
| 74 GrGLGPFragmentBuilder* fs = args.fPB->getFragmentShaderBuilder(); |
| 75 const PathBatchTracker& local = args.fBT.cast<PathBatchTracker>(); |
| 76 |
| 77 // Setup uniform color |
| 78 if (kUniform_GrGPInput == local.fInputColorType) { |
| 79 const char* stagedLocalVarName; |
| 80 fColorUniform = pb->addUniform(GrGLProgramBuilder::kFragment_Visibil
ity, |
| 81 kVec4f_GrSLType, |
| 82 kDefault_GrSLPrecision, |
| 83 "Color", |
| 84 &stagedLocalVarName); |
| 85 fs->codeAppendf("%s = %s;", args.fOutputColor, stagedLocalVarName); |
| 86 } |
| 87 |
| 88 // setup constant solid coverage |
| 89 if (kAllOnes_GrGPInput == local.fInputCoverageType) { |
| 90 fs->codeAppendf("%s = vec4(1);", args.fOutputCoverage); |
| 91 } |
| 92 } |
| 93 |
| 94 static inline void GenKey(const GrPathProcessor&, |
| 95 const GrBatchTracker& bt, |
| 96 const GrGLCaps&, |
| 97 GrProcessorKeyBuilder* b) { |
| 98 const PathBatchTracker& local = bt.cast<PathBatchTracker>(); |
| 99 b->add32(local.fInputColorType | local.fInputCoverageType << 16); |
| 100 } |
| 101 |
| 102 void setData(const GrGLProgramDataManager& pdman, |
| 103 const GrPrimitiveProcessor& primProc, |
| 104 const GrBatchTracker& bt) SK_OVERRIDE { |
| 105 const PathBatchTracker& local = bt.cast<PathBatchTracker>(); |
| 106 if (kUniform_GrGPInput == local.fInputColorType && local.fColor != fColo
r) { |
| 107 GrGLfloat c[4]; |
| 108 GrColorToRGBAFloat(local.fColor, c); |
| 109 pdman.set4fv(fColorUniform, 1, c); |
| 110 fColor = local.fColor; |
| 111 } |
| 112 } |
| 113 |
| 114 private: |
| 115 UniformHandle fColorUniform; |
| 116 GrColor fColor; |
| 117 |
| 118 typedef GrGLGeometryProcessor INHERITED; |
| 119 }; |
| 120 |
| 121 GrPathProcessor::GrPathProcessor(GrColor color) : fColor(color) { |
| 122 this->initClassID<GrPathProcessor>(); |
| 123 } |
| 124 |
| 125 void GrPathProcessor::getInvariantOutputColor(GrInitInvariantOutput* out) const
{ |
| 126 out->setKnownFourComponents(fColor); |
| 127 } |
| 128 |
| 129 void GrPathProcessor::getInvariantOutputCoverage(GrInitInvariantOutput* out) con
st { |
| 130 out->setKnownSingleComponent(0xff); |
| 131 } |
| 132 |
| 133 void GrPathProcessor::initBatchTracker(GrBatchTracker* bt, const InitBT& init) c
onst { |
| 134 PathBatchTracker* local = bt->cast<PathBatchTracker>(); |
| 135 if (init.fColorIgnored) { |
| 136 local->fInputColorType = kIgnored_GrGPInput; |
| 137 local->fColor = GrColor_ILLEGAL; |
| 138 } else { |
| 139 local->fInputColorType = kUniform_GrGPInput; |
| 140 local->fColor = GrColor_ILLEGAL == init.fOverrideColor ? this->color() : |
| 141 init.fOverrideC
olor; |
| 142 } |
| 143 |
| 144 local->fInputCoverageType = init.fCoverageIgnored ? kIgnored_GrGPInput : kAl
lOnes_GrGPInput; |
| 145 } |
| 146 |
| 147 bool GrPathProcessor::canMakeEqual(const GrBatchTracker& m, |
| 148 const GrPrimitiveProcessor& that, |
| 149 const GrBatchTracker& t) const { |
| 150 if (this->classID() != that.classID() || !this->hasSameTextureAccesses(that)
) { |
| 151 return false; |
| 152 } |
| 153 |
| 154 const PathBatchTracker& mine = m.cast<PathBatchTracker>(); |
| 155 const PathBatchTracker& theirs = t.cast<PathBatchTracker>(); |
| 156 return CanCombineOutput(mine.fInputColorType, mine.fColor, |
| 157 theirs.fInputColorType, theirs.fColor) && |
| 158 CanCombineOutput(mine.fInputCoverageType, 0xff, |
| 159 theirs.fInputCoverageType, 0xff); |
| 160 } |
| 161 |
| 162 void GrPathProcessor::getGLProcessorKey(const GrBatchTracker& bt, |
| 163 const GrGLCaps& caps, |
| 164 GrProcessorKeyBuilder* b) const { |
| 165 GrGLPathProcessor::GenKey(*this, bt, caps, b); |
| 166 } |
| 167 |
| 168 GrGLGeometryProcessor* GrPathProcessor::createGLInstance(const GrBatchTracker& b
t) const { |
| 169 return SkNEW_ARGS(GrGLPathProcessor, (*this, bt)); |
| 170 } |
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