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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 #ifndef GrGLFragmentShaderBuilder_DEFINED | 8 #ifndef GrGLFragmentShaderBuilder_DEFINED |
9 #define GrGLFragmentShaderBuilder_DEFINED | 9 #define GrGLFragmentShaderBuilder_DEFINED |
10 | 10 |
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105 | 105 |
106 /* | 106 /* |
107 * Fragment processor's, in addition to all of the above, may need to use dst co
lor so they use | 107 * Fragment processor's, in addition to all of the above, may need to use dst co
lor so they use |
108 * this builder to create their shader. Because this is the only shader builder
the FP sees, we | 108 * this builder to create their shader. Because this is the only shader builder
the FP sees, we |
109 * just call it FPShaderBuilder | 109 * just call it FPShaderBuilder |
110 */ | 110 */ |
111 class GrGLXPFragmentBuilder : public GrGLFragmentBuilder { | 111 class GrGLXPFragmentBuilder : public GrGLFragmentBuilder { |
112 public: | 112 public: |
113 GrGLXPFragmentBuilder(GrGLProgramBuilder* program) : INHERITED(program) {} | 113 GrGLXPFragmentBuilder(GrGLProgramBuilder* program) : INHERITED(program) {} |
114 | 114 |
115 /** Returns the variable name that holds the color of the destination pixel.
This may be NULL if | 115 /** Returns the variable name that holds the color of the destination pixel.
This may be nullptr if |
116 no effect advertised that it will read the destination. */ | 116 no effect advertised that it will read the destination. */ |
117 virtual const char* dstColor() = 0; | 117 virtual const char* dstColor() = 0; |
118 | 118 |
119 /** Adds any necessary layout qualifiers in order to legalize the supplied b
lend equation with | 119 /** Adds any necessary layout qualifiers in order to legalize the supplied b
lend equation with |
120 this shader. It is only legal to call this method with an advanced blend
equation, and only | 120 this shader. It is only legal to call this method with an advanced blend
equation, and only |
121 if these equations are supported. */ | 121 if these equations are supported. */ |
122 virtual void enableAdvancedBlendEquationIfNeeded(GrBlendEquation) = 0; | 122 virtual void enableAdvancedBlendEquationIfNeeded(GrBlendEquation) = 0; |
123 | 123 |
124 private: | 124 private: |
125 typedef GrGLFragmentBuilder INHERITED; | 125 typedef GrGLFragmentBuilder INHERITED; |
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212 // the program creator | 212 // the program creator |
213 bool fHasReadDstColor; | 213 bool fHasReadDstColor; |
214 bool fHasReadFragmentPosition; | 214 bool fHasReadFragmentPosition; |
215 | 215 |
216 friend class GrGLProgramBuilder; | 216 friend class GrGLProgramBuilder; |
217 | 217 |
218 typedef GrGLXPFragmentBuilder INHERITED; | 218 typedef GrGLXPFragmentBuilder INHERITED; |
219 }; | 219 }; |
220 | 220 |
221 #endif | 221 #endif |
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