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| 1 /* | 1 /* |
| 2 * Copyright 2012 Google Inc. | 2 * Copyright 2012 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 #ifndef SkGradientShaderPriv_DEFINED | 8 #ifndef SkGradientShaderPriv_DEFINED |
| 9 #define SkGradientShaderPriv_DEFINED | 9 #define SkGradientShaderPriv_DEFINED |
| 10 | 10 |
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| 407 protected: | 407 protected: |
| 408 /** | 408 /** |
| 409 * Subclasses must call this. It will return a key for the part of the shade
r code controlled | 409 * Subclasses must call this. It will return a key for the part of the shade
r code controlled |
| 410 * by the base class. The subclasses must stick it in their key and then pas
s it to the below | 410 * by the base class. The subclasses must stick it in their key and then pas
s it to the below |
| 411 * emit* functions from their emitCode function. | 411 * emit* functions from their emitCode function. |
| 412 */ | 412 */ |
| 413 static uint32_t GenBaseGradientKey(const GrProcessor&); | 413 static uint32_t GenBaseGradientKey(const GrProcessor&); |
| 414 | 414 |
| 415 // Emits the uniform used as the y-coord to texture samples in derived class
es. Subclasses | 415 // Emits the uniform used as the y-coord to texture samples in derived class
es. Subclasses |
| 416 // should call this method from their emitCode(). | 416 // should call this method from their emitCode(). |
| 417 void emitUniforms(GrGLFPBuilder* builder, const GrGradientEffect&); | 417 void emitUniforms(GrGLSLFPBuilder* builder, const GrGradientEffect&); |
| 418 | 418 |
| 419 | 419 |
| 420 // emit code that gets a fragment's color from an expression for t; Has bran
ches for 3 separate | 420 // emit code that gets a fragment's color from an expression for t; Has bran
ches for 3 separate |
| 421 // control flows inside -- 2 color gradients, 3 color symmetric gradients (b
oth using | 421 // control flows inside -- 2 color gradients, 3 color symmetric gradients (b
oth using |
| 422 // native GLSL mix), and 4+ color gradients that use the traditional texture
lookup. | 422 // native GLSL mix), and 4+ color gradients that use the traditional texture
lookup. |
| 423 void emitColor(GrGLFPBuilder* builder, | 423 void emitColor(GrGLSLFPBuilder* builder, |
| 424 const GrGradientEffect&, | 424 const GrGradientEffect&, |
| 425 const char* gradientTValue, | 425 const char* gradientTValue, |
| 426 const char* outputColor, | 426 const char* outputColor, |
| 427 const char* inputColor, | 427 const char* inputColor, |
| 428 const TextureSamplerArray& samplers); | 428 const TextureSamplerArray& samplers); |
| 429 | 429 |
| 430 private: | 430 private: |
| 431 enum { | 431 enum { |
| 432 kPremulTypeKeyBitCnt = 1, | 432 kPremulTypeKeyBitCnt = 1, |
| 433 kPremulTypeMask = 1, | 433 kPremulTypeMask = 1, |
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| 449 GrGLSLProgramDataManager::UniformHandle fColorStartUni; | 449 GrGLSLProgramDataManager::UniformHandle fColorStartUni; |
| 450 GrGLSLProgramDataManager::UniformHandle fColorMidUni; | 450 GrGLSLProgramDataManager::UniformHandle fColorMidUni; |
| 451 GrGLSLProgramDataManager::UniformHandle fColorEndUni; | 451 GrGLSLProgramDataManager::UniformHandle fColorEndUni; |
| 452 | 452 |
| 453 typedef GrGLFragmentProcessor INHERITED; | 453 typedef GrGLFragmentProcessor INHERITED; |
| 454 }; | 454 }; |
| 455 | 455 |
| 456 #endif | 456 #endif |
| 457 | 457 |
| 458 #endif | 458 #endif |
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