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1 /* | 1 /* |
2 * Copyright 2013 Google Inc. | 2 * Copyright 2013 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 "SkArithmeticMode.h" | 8 #include "SkArithmeticMode.h" |
9 #include "SkColorPriv.h" | 9 #include "SkColorPriv.h" |
10 #include "SkFlattenableBuffers.h" | 10 #include "SkFlattenableBuffers.h" |
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238 | 238 |
239 class GrGLArithmeticEffect : public GrGLEffect { | 239 class GrGLArithmeticEffect : public GrGLEffect { |
240 public: | 240 public: |
241 GrGLArithmeticEffect(const GrBackendEffectFactory&, const GrDrawEffect&); | 241 GrGLArithmeticEffect(const GrBackendEffectFactory&, const GrDrawEffect&); |
242 virtual ~GrGLArithmeticEffect(); | 242 virtual ~GrGLArithmeticEffect(); |
243 | 243 |
244 virtual void emitCode(GrGLShaderBuilder*, | 244 virtual void emitCode(GrGLShaderBuilder*, |
245 const GrDrawEffect&, | 245 const GrDrawEffect&, |
246 EffectKey, | 246 EffectKey, |
247 const char* outputColor, | 247 const char* outputColor, |
248 const char* inputColor, | 248 const GrGLSLExpr4& inputColor, |
249 const TransformedCoordsArray&, | 249 const TransformedCoordsArray&, |
250 const TextureSamplerArray&) SK_OVERRIDE; | 250 const TextureSamplerArray&) SK_OVERRIDE; |
251 | 251 |
252 virtual void setData(const GrGLUniformManager&, const GrDrawEffect&) SK_OVER
RIDE; | 252 virtual void setData(const GrGLUniformManager&, const GrDrawEffect&) SK_OVER
RIDE; |
253 | 253 |
254 private: | 254 private: |
255 GrGLUniformManager::UniformHandle fKUni; | 255 GrGLUniformManager::UniformHandle fKUni; |
256 | 256 |
257 typedef GrGLEffect INHERITED; | 257 typedef GrGLEffect INHERITED; |
258 }; | 258 }; |
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337 : INHERITED(factory) { | 337 : INHERITED(factory) { |
338 } | 338 } |
339 | 339 |
340 GrGLArithmeticEffect::~GrGLArithmeticEffect() { | 340 GrGLArithmeticEffect::~GrGLArithmeticEffect() { |
341 } | 341 } |
342 | 342 |
343 void GrGLArithmeticEffect::emitCode(GrGLShaderBuilder* builder, | 343 void GrGLArithmeticEffect::emitCode(GrGLShaderBuilder* builder, |
344 const GrDrawEffect& drawEffect, | 344 const GrDrawEffect& drawEffect, |
345 EffectKey key, | 345 EffectKey key, |
346 const char* outputColor, | 346 const char* outputColor, |
347 const char* inputColor, | 347 const GrGLSLExpr4& inputColor, |
348 const TransformedCoordsArray& coords, | 348 const TransformedCoordsArray& coords, |
349 const TextureSamplerArray& samplers) { | 349 const TextureSamplerArray& samplers) { |
350 | 350 |
351 GrTexture* backgroundTex = drawEffect.castEffect<GrArithmeticEffect>().backg
roundTexture(); | 351 GrTexture* backgroundTex = drawEffect.castEffect<GrArithmeticEffect>().backg
roundTexture(); |
352 const char* dstColor; | 352 const char* dstColor; |
353 if (backgroundTex) { | 353 if (backgroundTex) { |
354 builder->fsCodeAppend("\t\tvec4 bgColor = "); | 354 builder->fsCodeAppend("\t\tvec4 bgColor = "); |
355 builder->fsAppendTextureLookup(samplers[0], coords[0].c_str(), coords[0]
.type()); | 355 builder->fsAppendTextureLookup(samplers[0], coords[0].c_str(), coords[0]
.type()); |
356 builder->fsCodeAppendf(";\n"); | 356 builder->fsCodeAppendf(";\n"); |
357 dstColor = "bgColor"; | 357 dstColor = "bgColor"; |
358 } else { | 358 } else { |
359 dstColor = builder->dstColor(); | 359 dstColor = builder->dstColor(); |
360 } | 360 } |
361 | 361 |
362 SkASSERT(NULL != dstColor); | 362 SkASSERT(NULL != dstColor); |
363 fKUni = builder->addUniform(GrGLShaderBuilder::kFragment_Visibility, | 363 fKUni = builder->addUniform(GrGLShaderBuilder::kFragment_Visibility, |
364 kVec4f_GrSLType, "k"); | 364 kVec4f_GrSLType, "k"); |
365 const char* kUni = builder->getUniformCStr(fKUni); | |
366 | 365 |
367 // We don't try to optimize for this case at all | 366 GrGLSLExpr4 src; |
368 if (NULL == inputColor) { | 367 if (gUseUnpremul) { |
369 builder->fsCodeAppendf("\t\tconst vec4 src = vec4(1);\n"); | 368 builder->fsCodeAppendf("\t\tvec4 src = %s;\n", inputColor.c_str()); |
| 369 builder->fsCodeAppendf("\t\tsrc.rgb = clamp(src.rgb / src.a, 0.0, 1.0);\
n"); |
| 370 src = GrGLSLExpr4("src"); |
370 } else { | 371 } else { |
371 builder->fsCodeAppendf("\t\tvec4 src = %s;\n", inputColor); | 372 src = inputColor; |
372 if (gUseUnpremul) { | |
373 builder->fsCodeAppendf("\t\tsrc.rgb = clamp(src.rgb / src.a, 0.0, 1.
0);\n"); | |
374 } | |
375 } | 373 } |
376 | 374 |
377 builder->fsCodeAppendf("\t\tvec4 dst = %s;\n", dstColor); | 375 GrGLSLExpr4 dst; |
378 if (gUseUnpremul) { | 376 if (gUseUnpremul) { |
| 377 builder->fsCodeAppendf("\t\tvec4 dst = %s;\n", dstColor); |
379 builder->fsCodeAppendf("\t\tdst.rgb = clamp(dst.rgb / dst.a, 0.0, 1.0);\
n"); | 378 builder->fsCodeAppendf("\t\tdst.rgb = clamp(dst.rgb / dst.a, 0.0, 1.0);\
n"); |
| 379 dst = GrGLSLExpr4("dst"); |
| 380 } else { |
| 381 dst = GrGLSLExpr4(dstColor); |
380 } | 382 } |
381 | 383 |
382 builder->fsCodeAppendf("\t\t%s = %s.x * src * dst + %s.y * src + %s.z * dst
+ %s.w;\n", outputColor, kUni, kUni, kUni, kUni); | 384 GrGLSLExpr4 kExpr(builder->getUniformCStr(fKUni)); |
| 385 builder->fsCodeAppendf("\t\t%s = %s;\n", outputColor, |
| 386 (kExpr.x() * inputColor * dst + |
| 387 kExpr.y() * src + |
| 388 kExpr.z() * dst + |
| 389 kExpr.w()).c_str()); |
| 390 |
383 builder->fsCodeAppendf("\t\t%s = clamp(%s, 0.0, 1.0);\n", outputColor, outpu
tColor); | 391 builder->fsCodeAppendf("\t\t%s = clamp(%s, 0.0, 1.0);\n", outputColor, outpu
tColor); |
384 if (gUseUnpremul) { | 392 if (gUseUnpremul) { |
385 builder->fsCodeAppendf("\t\t%s.rgb *= %s.a;\n", outputColor, outputColor
); | 393 builder->fsCodeAppendf("\t\t%s.rgb *= %s.a;\n", outputColor, outputColor
); |
386 } else { | 394 } else { |
387 builder->fsCodeAppendf("\t\t%s.rgb = min(%s.rgb, %s.a);\n", outputColor,
outputColor, outputColor); | 395 builder->fsCodeAppendf("\t\t%s.rgb = min(%s.rgb, %s.a);\n", outputColor,
outputColor, outputColor); |
388 } | 396 } |
389 } | 397 } |
390 | 398 |
391 void GrGLArithmeticEffect::setData(const GrGLUniformManager& uman, const GrDrawE
ffect& drawEffect) { | 399 void GrGLArithmeticEffect::setData(const GrGLUniformManager& uman, const GrDrawE
ffect& drawEffect) { |
392 const GrArithmeticEffect& arith = drawEffect.castEffect<GrArithmeticEffect>(
); | 400 const GrArithmeticEffect& arith = drawEffect.castEffect<GrArithmeticEffect>(
); |
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421 background); | 429 background); |
422 } | 430 } |
423 return true; | 431 return true; |
424 } | 432 } |
425 | 433 |
426 #endif | 434 #endif |
427 | 435 |
428 SK_DEFINE_FLATTENABLE_REGISTRAR_GROUP_START(SkArithmeticMode) | 436 SK_DEFINE_FLATTENABLE_REGISTRAR_GROUP_START(SkArithmeticMode) |
429 SK_DEFINE_FLATTENABLE_REGISTRAR_ENTRY(SkArithmeticMode_scalar) | 437 SK_DEFINE_FLATTENABLE_REGISTRAR_ENTRY(SkArithmeticMode_scalar) |
430 SK_DEFINE_FLATTENABLE_REGISTRAR_GROUP_END | 438 SK_DEFINE_FLATTENABLE_REGISTRAR_GROUP_END |
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