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1 /* | 1 /* |
2 * Copyright 2014 Google Inc. | 2 * Copyright 2014 Google Inc. |
3 * | 3 * |
4 * Use of this source code is governed by a BSD-style license that can be | 4 * Use of this source code is governed by a BSD-style license that can be |
5 * found in the LICENSE file. | 5 * found in the LICENSE file. |
6 */ | 6 */ |
7 | 7 |
8 #include "GrGLSLFragmentShaderBuilder.h" | 8 #include "GrGLSLFragmentShaderBuilder.h" |
9 #include "GrRenderTarget.h" | 9 #include "GrRenderTarget.h" |
10 #include "GrRenderTargetPriv.h" | 10 #include "GrRenderTargetPriv.h" |
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118 if (const char* extension = glslCaps.multisampleInterpolationExtensi
onString()) { | 118 if (const char* extension = glslCaps.multisampleInterpolationExtensi
onString()) { |
119 this->addFeature(1 << kMultisampleInterpolation_GLSLFeature, ext
ension); | 119 this->addFeature(1 << kMultisampleInterpolation_GLSLFeature, ext
ension); |
120 } | 120 } |
121 return true; | 121 return true; |
122 default: | 122 default: |
123 SkFAIL("Unexpected GLSLFeature requested."); | 123 SkFAIL("Unexpected GLSLFeature requested."); |
124 return false; | 124 return false; |
125 } | 125 } |
126 } | 126 } |
127 | 127 |
128 SkString GrGLSLFragmentShaderBuilder::ensureFSCoords2D(const GrGLSLTransformedCo
ordsArray& coords, | 128 SkString GrGLSLFragmentShaderBuilder::ensureCoords2D(const GrShaderVar& coords)
{ |
129 int index) { | 129 if (kVec3f_GrSLType != coords.getType()) { |
130 if (kVec3f_GrSLType != coords[index].getType()) { | 130 SkASSERT(kVec2f_GrSLType == coords.getType()); |
131 SkASSERT(kVec2f_GrSLType == coords[index].getType()); | 131 return coords.getName(); |
132 return coords[index].getName(); | |
133 } | 132 } |
134 | 133 |
135 SkString coords2D("coords2D"); | 134 SkString coords2D; |
136 if (0 != index) { | 135 coords2D.printf("%s_ensure2D", coords.c_str()); |
137 coords2D.appendf("_%i", index); | 136 this->codeAppendf("\tvec2 %s = %s.xy / %s.z;", coords2D.c_str(), coords.c_st
r(), |
138 } | 137 coords.c_str()); |
139 this->codeAppendf("\tvec2 %s = %s.xy / %s.z;", | |
140 coords2D.c_str(), coords[index].c_str(), coords[index].c_s
tr()); | |
141 return coords2D; | 138 return coords2D; |
142 } | 139 } |
143 | 140 |
144 const char* GrGLSLFragmentShaderBuilder::fragmentPosition() { | 141 const char* GrGLSLFragmentShaderBuilder::fragmentPosition() { |
145 SkDEBUGCODE(fUsedProcessorFeatures |= GrProcessor::kFragmentPosition_Require
dFeature;) | 142 SkDEBUGCODE(fUsedProcessorFeatures |= GrProcessor::kFragmentPosition_Require
dFeature;) |
146 | 143 |
147 const GrGLSLCaps* glslCaps = fProgramBuilder->glslCaps(); | 144 const GrGLSLCaps* glslCaps = fProgramBuilder->glslCaps(); |
148 // We only declare "gl_FragCoord" when we're in the case where we want to us
e layout qualifiers | 145 // We only declare "gl_FragCoord" when we're in the case where we want to us
e layout qualifiers |
149 // to reverse y. Otherwise it isn't necessary and whether the "in" qualifier
appears in the | 146 // to reverse y. Otherwise it isn't necessary and whether the "in" qualifier
appears in the |
150 // declaration varies in earlier GLSL specs. So it is simpler to omit it. | 147 // declaration varies in earlier GLSL specs. So it is simpler to omit it. |
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391 fMangleString.appendf("_c%d", fSubstageIndices[fSubstageIndices.count() - 2]
); | 388 fMangleString.appendf("_c%d", fSubstageIndices[fSubstageIndices.count() - 2]
); |
392 } | 389 } |
393 | 390 |
394 void GrGLSLFragmentShaderBuilder::onAfterChildProcEmitCode() { | 391 void GrGLSLFragmentShaderBuilder::onAfterChildProcEmitCode() { |
395 SkASSERT(fSubstageIndices.count() >= 2); | 392 SkASSERT(fSubstageIndices.count() >= 2); |
396 fSubstageIndices.pop_back(); | 393 fSubstageIndices.pop_back(); |
397 fSubstageIndices.back()++; | 394 fSubstageIndices.back()++; |
398 int removeAt = fMangleString.findLastOf('_'); | 395 int removeAt = fMangleString.findLastOf('_'); |
399 fMangleString.remove(removeAt, fMangleString.size() - removeAt); | 396 fMangleString.remove(removeAt, fMangleString.size() - removeAt); |
400 } | 397 } |
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