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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 "SkReadBuffer.h" | 10 #include "SkReadBuffer.h" |
11 #include "SkWriteBuffer.h" | 11 #include "SkWriteBuffer.h" |
12 #include "SkString.h" | 12 #include "SkString.h" |
13 #include "SkUnPreMultiply.h" | 13 #include "SkUnPreMultiply.h" |
14 #if SK_SUPPORT_GPU | 14 #if SK_SUPPORT_GPU |
15 #include "GrContext.h" | 15 #include "GrContext.h" |
16 #include "GrCoordTransform.h" | 16 #include "GrCoordTransform.h" |
17 #include "gl/GrGLEffect.h" | 17 #include "gl/GrGLEffect.h" |
18 #include "gl/GrGLShaderBuilder.h" | 18 #include "gl/builders/GrGLProgramBuilder.h" |
19 #include "GrTBackendEffectFactory.h" | 19 #include "GrTBackendEffectFactory.h" |
20 #endif | 20 #endif |
21 | 21 |
22 static const bool gUseUnpremul = false; | 22 static const bool gUseUnpremul = false; |
23 | 23 |
24 class SkArithmeticMode_scalar : public SkXfermode { | 24 class SkArithmeticMode_scalar : public SkXfermode { |
25 public: | 25 public: |
26 static SkArithmeticMode_scalar* Create(SkScalar k1, SkScalar k2, SkScalar k3
, SkScalar k4, | 26 static SkArithmeticMode_scalar* Create(SkScalar k1, SkScalar k2, SkScalar k3
, SkScalar k4, |
27 bool enforcePMColor) { | 27 bool enforcePMColor) { |
28 return SkNEW_ARGS(SkArithmeticMode_scalar, (k1, k2, k3, k4, enforcePMCol
or)); | 28 return SkNEW_ARGS(SkArithmeticMode_scalar, (k1, k2, k3, k4, enforcePMCol
or)); |
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245 | 245 |
246 ////////////////////////////////////////////////////////////////////////////// | 246 ////////////////////////////////////////////////////////////////////////////// |
247 | 247 |
248 #if SK_SUPPORT_GPU | 248 #if SK_SUPPORT_GPU |
249 | 249 |
250 class GrGLArithmeticEffect : public GrGLEffect { | 250 class GrGLArithmeticEffect : public GrGLEffect { |
251 public: | 251 public: |
252 GrGLArithmeticEffect(const GrBackendEffectFactory&, const GrDrawEffect&); | 252 GrGLArithmeticEffect(const GrBackendEffectFactory&, const GrDrawEffect&); |
253 virtual ~GrGLArithmeticEffect(); | 253 virtual ~GrGLArithmeticEffect(); |
254 | 254 |
255 virtual void emitCode(GrGLShaderBuilder*, | 255 virtual void emitCode(GrGLProgramBuilder*, |
256 const GrDrawEffect&, | 256 const GrDrawEffect&, |
257 const GrEffectKey&, | 257 const GrEffectKey&, |
258 const char* outputColor, | 258 const char* outputColor, |
259 const char* inputColor, | 259 const char* inputColor, |
260 const TransformedCoordsArray&, | 260 const TransformedCoordsArray&, |
261 const TextureSamplerArray&) SK_OVERRIDE; | 261 const TextureSamplerArray&) SK_OVERRIDE; |
262 | 262 |
263 virtual void setData(const GrGLProgramDataManager&, const GrDrawEffect&) SK_
OVERRIDE; | 263 virtual void setData(const GrGLProgramDataManager&, const GrDrawEffect&) SK_
OVERRIDE; |
264 | 264 |
265 static void GenKey(const GrDrawEffect&, const GrGLCaps& caps, GrEffectKeyBui
lder* b); | 265 static void GenKey(const GrDrawEffect&, const GrGLCaps& caps, GrEffectKeyBui
lder* b); |
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352 | 352 |
353 GrGLArithmeticEffect::GrGLArithmeticEffect(const GrBackendEffectFactory& factory
, | 353 GrGLArithmeticEffect::GrGLArithmeticEffect(const GrBackendEffectFactory& factory
, |
354 const GrDrawEffect& drawEffect) | 354 const GrDrawEffect& drawEffect) |
355 : INHERITED(factory), | 355 : INHERITED(factory), |
356 fEnforcePMColor(true) { | 356 fEnforcePMColor(true) { |
357 } | 357 } |
358 | 358 |
359 GrGLArithmeticEffect::~GrGLArithmeticEffect() { | 359 GrGLArithmeticEffect::~GrGLArithmeticEffect() { |
360 } | 360 } |
361 | 361 |
362 void GrGLArithmeticEffect::emitCode(GrGLShaderBuilder* builder, | 362 void GrGLArithmeticEffect::emitCode(GrGLProgramBuilder* builder, |
363 const GrDrawEffect& drawEffect, | 363 const GrDrawEffect& drawEffect, |
364 const GrEffectKey& key, | 364 const GrEffectKey& key, |
365 const char* outputColor, | 365 const char* outputColor, |
366 const char* inputColor, | 366 const char* inputColor, |
367 const TransformedCoordsArray& coords, | 367 const TransformedCoordsArray& coords, |
368 const TextureSamplerArray& samplers) { | 368 const TextureSamplerArray& samplers) { |
369 | 369 |
370 GrTexture* backgroundTex = drawEffect.castEffect<GrArithmeticEffect>().backg
roundTexture(); | 370 GrTexture* backgroundTex = drawEffect.castEffect<GrArithmeticEffect>().backg
roundTexture(); |
| 371 GrGLFragmentShaderBuilder* fsBuilder = builder->getFragmentShaderBuilder(); |
371 const char* dstColor; | 372 const char* dstColor; |
372 if (backgroundTex) { | 373 if (backgroundTex) { |
373 builder->fsCodeAppend("\t\tvec4 bgColor = "); | 374 fsBuilder->codeAppend("\t\tvec4 bgColor = "); |
374 builder->fsAppendTextureLookup(samplers[0], coords[0].c_str(), coords[0]
.type()); | 375 fsBuilder->appendTextureLookup(samplers[0], coords[0].c_str(), coords[0]
.type()); |
375 builder->fsCodeAppendf(";\n"); | 376 fsBuilder->codeAppendf(";\n"); |
376 dstColor = "bgColor"; | 377 dstColor = "bgColor"; |
377 } else { | 378 } else { |
378 dstColor = builder->dstColor(); | 379 dstColor = fsBuilder->dstColor(); |
379 } | 380 } |
380 | 381 |
381 SkASSERT(NULL != dstColor); | 382 SkASSERT(NULL != dstColor); |
382 fKUni = builder->addUniform(GrGLShaderBuilder::kFragment_Visibility, | 383 fKUni = builder->addUniform(GrGLProgramBuilder::kFragment_Visibility, |
383 kVec4f_GrSLType, "k"); | 384 kVec4f_GrSLType, "k"); |
384 const char* kUni = builder->getUniformCStr(fKUni); | 385 const char* kUni = builder->getUniformCStr(fKUni); |
385 | 386 |
386 // We don't try to optimize for this case at all | 387 // We don't try to optimize for this case at all |
387 if (NULL == inputColor) { | 388 if (NULL == inputColor) { |
388 builder->fsCodeAppendf("\t\tconst vec4 src = vec4(1);\n"); | 389 fsBuilder->codeAppendf("\t\tconst vec4 src = vec4(1);\n"); |
389 } else { | 390 } else { |
390 builder->fsCodeAppendf("\t\tvec4 src = %s;\n", inputColor); | 391 fsBuilder->codeAppendf("\t\tvec4 src = %s;\n", inputColor); |
391 if (gUseUnpremul) { | 392 if (gUseUnpremul) { |
392 builder->fsCodeAppendf("\t\tsrc.rgb = clamp(src.rgb / src.a, 0.0, 1.
0);\n"); | 393 fsBuilder->codeAppendf("\t\tsrc.rgb = clamp(src.rgb / src.a, 0.0, 1.
0);\n"); |
393 } | 394 } |
394 } | 395 } |
395 | 396 |
396 builder->fsCodeAppendf("\t\tvec4 dst = %s;\n", dstColor); | 397 fsBuilder->codeAppendf("\t\tvec4 dst = %s;\n", dstColor); |
397 if (gUseUnpremul) { | 398 if (gUseUnpremul) { |
398 builder->fsCodeAppendf("\t\tdst.rgb = clamp(dst.rgb / dst.a, 0.0, 1.0);\
n"); | 399 fsBuilder->codeAppendf("\t\tdst.rgb = clamp(dst.rgb / dst.a, 0.0, 1.0);\
n"); |
399 } | 400 } |
400 | 401 |
401 builder->fsCodeAppendf("\t\t%s = %s.x * src * dst + %s.y * src + %s.z * dst
+ %s.w;\n", outputColor, kUni, kUni, kUni, kUni); | 402 fsBuilder->codeAppendf("\t\t%s = %s.x * src * dst + %s.y * src + %s.z * dst
+ %s.w;\n", outputColor, kUni, kUni, kUni, kUni); |
402 builder->fsCodeAppendf("\t\t%s = clamp(%s, 0.0, 1.0);\n", outputColor, outpu
tColor); | 403 fsBuilder->codeAppendf("\t\t%s = clamp(%s, 0.0, 1.0);\n", outputColor, outpu
tColor); |
403 if (gUseUnpremul) { | 404 if (gUseUnpremul) { |
404 builder->fsCodeAppendf("\t\t%s.rgb *= %s.a;\n", outputColor, outputColor
); | 405 fsBuilder->codeAppendf("\t\t%s.rgb *= %s.a;\n", outputColor, outputColor
); |
405 } else if (fEnforcePMColor) { | 406 } else if (fEnforcePMColor) { |
406 builder->fsCodeAppendf("\t\t%s.rgb = min(%s.rgb, %s.a);\n", outputColor,
outputColor, outputColor); | 407 fsBuilder->codeAppendf("\t\t%s.rgb = min(%s.rgb, %s.a);\n", outputColor,
outputColor, outputColor); |
407 } | 408 } |
408 } | 409 } |
409 | 410 |
410 void GrGLArithmeticEffect::setData(const GrGLProgramDataManager& pdman, const Gr
DrawEffect& drawEffect) { | 411 void GrGLArithmeticEffect::setData(const GrGLProgramDataManager& pdman, const Gr
DrawEffect& drawEffect) { |
411 const GrArithmeticEffect& arith = drawEffect.castEffect<GrArithmeticEffect>(
); | 412 const GrArithmeticEffect& arith = drawEffect.castEffect<GrArithmeticEffect>(
); |
412 pdman.set4f(fKUni, arith.k1(), arith.k2(), arith.k3(), arith.k4()); | 413 pdman.set4f(fKUni, arith.k1(), arith.k2(), arith.k3(), arith.k4()); |
413 fEnforcePMColor = arith.enforcePMColor(); | 414 fEnforcePMColor = arith.enforcePMColor(); |
414 } | 415 } |
415 | 416 |
416 void GrGLArithmeticEffect::GenKey(const GrDrawEffect& drawEffect, | 417 void GrGLArithmeticEffect::GenKey(const GrDrawEffect& drawEffect, |
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448 background); | 449 background); |
449 } | 450 } |
450 return true; | 451 return true; |
451 } | 452 } |
452 | 453 |
453 #endif | 454 #endif |
454 | 455 |
455 SK_DEFINE_FLATTENABLE_REGISTRAR_GROUP_START(SkArithmeticMode) | 456 SK_DEFINE_FLATTENABLE_REGISTRAR_GROUP_START(SkArithmeticMode) |
456 SK_DEFINE_FLATTENABLE_REGISTRAR_ENTRY(SkArithmeticMode_scalar) | 457 SK_DEFINE_FLATTENABLE_REGISTRAR_ENTRY(SkArithmeticMode_scalar) |
457 SK_DEFINE_FLATTENABLE_REGISTRAR_GROUP_END | 458 SK_DEFINE_FLATTENABLE_REGISTRAR_GROUP_END |
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