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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 GrGLProcessor_DEFINED | 8 #ifndef GrGLProcessor_DEFINED |
9 #define GrGLProcessor_DEFINED | 9 #define GrGLProcessor_DEFINED |
10 | 10 |
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58 UniformHandle fSamplerUniform; | 58 UniformHandle fSamplerUniform; |
59 uint32_t fConfigComponentMask; | 59 uint32_t fConfigComponentMask; |
60 char fSwizzle[5]; | 60 char fSwizzle[5]; |
61 | 61 |
62 friend class GrGLShaderBuilder; | 62 friend class GrGLShaderBuilder; |
63 }; | 63 }; |
64 | 64 |
65 typedef SkTArray<TextureSampler> TextureSamplerArray; | 65 typedef SkTArray<TextureSampler> TextureSamplerArray; |
66 }; | 66 }; |
67 | 67 |
68 class GrGLFPBuilder; | |
69 | |
70 class GrGLFragmentProcessor { | |
71 public: | |
72 GrGLFragmentProcessor() {} | |
73 | |
74 virtual ~GrGLFragmentProcessor() {} | |
75 | |
76 typedef GrGLProgramDataManager::UniformHandle UniformHandle; | |
77 typedef GrGLProcessor::TransformedCoordsArray TransformedCoordsArray; | |
78 typedef GrGLProcessor::TextureSamplerArray TextureSamplerArray; | |
79 | |
80 /** Called when the program stage should insert its code into the shaders. T
he code in each | |
81 shader will be in its own block ({}) and so locally scoped names will no
t collide across | |
82 stages. | |
83 | |
84 @param builder Interface used to emit code in the shaders. | |
85 @param processor The processor that generated this program stage. | |
86 @param key The key that was computed by GenKey() from the gener
ating GrProcessor. | |
87 @param outputColor A predefined vec4 in the FS in which the stage shoul
d place its output | |
88 color (or coverage). | |
89 @param inputColor A vec4 that holds the input color to the stage in th
e FS. This may be | |
90 NULL in which case the implied input is solid white
(all ones). | |
91 TODO: Better system for communicating optimization i
nfo (e.g. input | |
92 color is solid white, trans black, known to be opaqu
e, etc.) that allows | |
93 the processor to communicate back similar known info
about its output. | |
94 @param samplers Contains one entry for each GrTextureAccess of the G
rProcessor. These | |
95 can be passed to the builder to emit texture reads i
n the generated | |
96 code. | |
97 TODO this should take a struct | |
98 */ | |
99 virtual void emitCode(GrGLFPBuilder* builder, | |
100 const GrFragmentProcessor&, | |
101 const char* outputColor, | |
102 const char* inputColor, | |
103 const TransformedCoordsArray& coords, | |
104 const TextureSamplerArray& samplers) = 0; | |
105 | |
106 /** A GrGLFragmentProcessor instance can be reused with any GrFragmentProces
sor that produces | |
107 the same stage key; this function reads data from a GrFragmentProcessor
and uploads any | |
108 uniform variables required by the shaders created in emitCode(). The GrF
ragmentProcessor | |
109 parameter is guaranteed to be of the same type that created this GrGLFra
gmentProcessor and | |
110 to have an identical processor key as the one that created this GrGLFrag
mentProcessor. */ | |
111 // TODO update this to pass in GrFragmentProcessor | |
112 virtual void setData(const GrGLProgramDataManager&, const GrProcessor&) {} | |
113 | |
114 static void GenKey(const GrProcessor&, const GrGLSLCaps&, GrProcessorKeyBuil
der*) {} | |
115 | |
116 private: | |
117 typedef GrGLProcessor INHERITED; | |
118 }; | |
119 | |
120 #endif | 68 #endif |
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