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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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169 static const char* kTempName = "tmpXYFragCoord"; | 169 static const char* kTempName = "tmpXYFragCoord"; |
170 static const char* kCoordName = "fragCoordYDown"; | 170 static const char* kCoordName = "fragCoordYDown"; |
171 if (!fSetupFragPosition) { | 171 if (!fSetupFragPosition) { |
172 const char* rtHeightName; | 172 const char* rtHeightName; |
173 | 173 |
174 fProgramBuilder->addRTHeightUniform("RTHeight", &rtHeightName); | 174 fProgramBuilder->addRTHeightUniform("RTHeight", &rtHeightName); |
175 | 175 |
176 // The Adreno compiler seems to be very touchy about access to "gl_F
ragCoord". | 176 // The Adreno compiler seems to be very touchy about access to "gl_F
ragCoord". |
177 // Accessing glFragCoord.zw can cause a program to fail to link. Add
itionally, | 177 // Accessing glFragCoord.zw can cause a program to fail to link. Add
itionally, |
178 // depending on the surrounding code, accessing .xy with a uniform i
nvolved can | 178 // depending on the surrounding code, accessing .xy with a uniform i
nvolved can |
179 // do the same thing. Copying gl_FragCoord.xy into a temp vec2 befor
ehand | 179 // do the same thing. Copying gl_FragCoord.xy into a temp vec2 befor
ehand |
180 // (and only accessing .xy) seems to "fix" things. | 180 // (and only accessing .xy) seems to "fix" things. |
181 const char* precision = glslCaps->usesPrecisionModifiers() ? "highp
" : ""; | 181 const char* precision = glslCaps->usesPrecisionModifiers() ? "highp
" : ""; |
182 this->codePrependf("\t%svec4 %s = vec4(%s.x, %s - %s.y, 1.0, 1.0);\n
", | 182 this->codePrependf("\t%svec4 %s = vec4(%s.x, %s - %s.y, 1.0, 1.0);\n
", |
183 precision, kCoordName, kTempName, rtHeightName, k
TempName); | 183 precision, kCoordName, kTempName, rtHeightName, k
TempName); |
184 this->codePrependf("%svec2 %s = gl_FragCoord.xy;", precision, kTempN
ame); | 184 this->codePrependf("%svec2 %s = gl_FragCoord.xy;", precision, kTempN
ame); |
185 fSetupFragPosition = true; | 185 fSetupFragPosition = true; |
186 } | 186 } |
187 SkASSERT(fProgramBuilder->fUniformHandles.fRTHeightUni.isValid()); | 187 SkASSERT(fProgramBuilder->fUniformHandles.fRTHeightUni.isValid()); |
188 return kCoordName; | 188 return kCoordName; |
189 } | 189 } |
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257 // Some versions of this extension string require declaring custom color
output on ES 3.0+ | 257 // Some versions of this extension string require declaring custom color
output on ES 3.0+ |
258 const char* fbFetchColorName = glslCaps->fbFetchColorName(); | 258 const char* fbFetchColorName = glslCaps->fbFetchColorName(); |
259 if (glslCaps->fbFetchNeedsCustomOutput()) { | 259 if (glslCaps->fbFetchNeedsCustomOutput()) { |
260 this->enableCustomOutput(); | 260 this->enableCustomOutput(); |
261 fOutputs[fCustomColorOutputIndex].setTypeModifier(GrShaderVar::kInOu
t_TypeModifier); | 261 fOutputs[fCustomColorOutputIndex].setTypeModifier(GrShaderVar::kInOu
t_TypeModifier); |
262 fbFetchColorName = DeclaredColorOutputName(); | 262 fbFetchColorName = DeclaredColorOutputName(); |
263 } | 263 } |
264 return fbFetchColorName; | 264 return fbFetchColorName; |
265 } else { | 265 } else { |
266 return kDstTextureColorName; | 266 return kDstTextureColorName; |
267 } | 267 } |
268 } | 268 } |
269 | 269 |
270 void GrGLSLFragmentShaderBuilder::enableAdvancedBlendEquationIfNeeded(GrBlendEqu
ation equation) { | 270 void GrGLSLFragmentShaderBuilder::enableAdvancedBlendEquationIfNeeded(GrBlendEqu
ation equation) { |
271 SkASSERT(GrBlendEquationIsAdvanced(equation)); | 271 SkASSERT(GrBlendEquationIsAdvanced(equation)); |
272 | 272 |
273 const GrGLSLCaps& caps = *fProgramBuilder->glslCaps(); | 273 const GrGLSLCaps& caps = *fProgramBuilder->glslCaps(); |
274 if (!caps.mustEnableAdvBlendEqs()) { | 274 if (!caps.mustEnableAdvBlendEqs()) { |
275 return; | 275 return; |
276 } | 276 } |
277 | 277 |
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315 } | 315 } |
316 | 316 |
317 const char* GrGLSLFragmentShaderBuilder::getPrimaryColorOutputName() const { | 317 const char* GrGLSLFragmentShaderBuilder::getPrimaryColorOutputName() const { |
318 return fHasCustomColorOutput ? DeclaredColorOutputName() : "gl_FragColor"; | 318 return fHasCustomColorOutput ? DeclaredColorOutputName() : "gl_FragColor"; |
319 } | 319 } |
320 | 320 |
321 void GrGLSLFragmentBuilder::declAppendf(const char* fmt, ...) { | 321 void GrGLSLFragmentBuilder::declAppendf(const char* fmt, ...) { |
322 va_list argp; | 322 va_list argp; |
323 va_start(argp, fmt); | 323 va_start(argp, fmt); |
324 inputs().appendVAList(fmt, argp); | 324 inputs().appendVAList(fmt, argp); |
325 va_end(argp); | 325 va_end(argp); |
326 } | 326 } |
327 | 327 |
328 const char* GrGLSLFragmentShaderBuilder::getSecondaryColorOutputName() const { | 328 const char* GrGLSLFragmentShaderBuilder::getSecondaryColorOutputName() const { |
329 const GrGLSLCaps& caps = *fProgramBuilder->glslCaps(); | 329 const GrGLSLCaps& caps = *fProgramBuilder->glslCaps(); |
330 return caps.mustDeclareFragmentShaderOutput() ? DeclaredSecondaryColorOutput
Name() | 330 return caps.mustDeclareFragmentShaderOutput() ? DeclaredSecondaryColorOutput
Name() |
331 : "gl_SecondaryFragColorEXT"; | 331 : "gl_SecondaryFragColorEXT"; |
332 } | 332 } |
333 | 333 |
334 GrSurfaceOrigin GrGLSLFragmentShaderBuilder::getSurfaceOrigin() const { | 334 GrSurfaceOrigin GrGLSLFragmentShaderBuilder::getSurfaceOrigin() const { |
335 SkASSERT(fProgramBuilder->header().fSurfaceOriginKey); | 335 SkASSERT(fProgramBuilder->header().fSurfaceOriginKey); |
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385 fMangleString.appendf("_c%d", fSubstageIndices[fSubstageIndices.count() - 2]
); | 385 fMangleString.appendf("_c%d", fSubstageIndices[fSubstageIndices.count() - 2]
); |
386 } | 386 } |
387 | 387 |
388 void GrGLSLFragmentShaderBuilder::onAfterChildProcEmitCode() { | 388 void GrGLSLFragmentShaderBuilder::onAfterChildProcEmitCode() { |
389 SkASSERT(fSubstageIndices.count() >= 2); | 389 SkASSERT(fSubstageIndices.count() >= 2); |
390 fSubstageIndices.pop_back(); | 390 fSubstageIndices.pop_back(); |
391 fSubstageIndices.back()++; | 391 fSubstageIndices.back()++; |
392 int removeAt = fMangleString.findLastOf('_'); | 392 int removeAt = fMangleString.findLastOf('_'); |
393 fMangleString.remove(removeAt, fMangleString.size() - removeAt); | 393 fMangleString.remove(removeAt, fMangleString.size() - removeAt); |
394 } | 394 } |
395 | |
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