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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 GrGLEffect_DEFINED | 8 #ifndef GrGLEffect_DEFINED |
9 #define GrGLEffect_DEFINED | 9 #define GrGLEffect_DEFINED |
10 | 10 |
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44 // the number of bits in EffectKey available to GenKey | 44 // the number of bits in EffectKey available to GenKey |
45 kEffectKeyBits = GrBackendEffectFactory::kEffectKeyBits, | 45 kEffectKeyBits = GrBackendEffectFactory::kEffectKeyBits, |
46 }; | 46 }; |
47 | 47 |
48 typedef GrGLShaderBuilder::TextureSamplerArray TextureSamplerArray; | 48 typedef GrGLShaderBuilder::TextureSamplerArray TextureSamplerArray; |
49 | 49 |
50 GrGLEffect(const GrBackendEffectFactory&); | 50 GrGLEffect(const GrBackendEffectFactory&); |
51 | 51 |
52 virtual ~GrGLEffect(); | 52 virtual ~GrGLEffect(); |
53 | 53 |
54 /** Called when GrGLProgram is about to create its GrGLShaderBuilder. When p
ossible, effects | |
55 should handle programs that don't have a vertex shader. But if an effect
requires special | |
56 vertex processing that can't be accomplished with the fixed pipeline, it
can override this | |
57 method and return true to guarantee the GrGLShaderBuilder in emitCode ha
s a VertexBuilder. | |
58 */ | |
59 virtual bool requiresVertexShader(const GrDrawEffect&) const { return false;
} | |
60 | |
61 /** Called when the program stage should insert its code into the shaders. T
he code in each | 54 /** Called when the program stage should insert its code into the shaders. T
he code in each |
62 shader will be in its own block ({}) and so locally scoped names will no
t collide across | 55 shader will be in its own block ({}) and so locally scoped names will no
t collide across |
63 stages. | 56 stages. |
64 | 57 |
65 @param builder Interface used to emit code in the shaders. | 58 @param builder Interface used to emit code in the shaders. |
66 @param drawEffect A wrapper on the effect that generated this program
stage. | 59 @param drawEffect A wrapper on the effect that generated this program
stage. |
67 @param key The key that was computed by GenKey() from the gener
ating GrEffect. | 60 @param key The key that was computed by GenKey() from the gener
ating GrEffect. |
68 Only the bits indicated by GrBackendEffectFactory::k
EffectKeyBits are | 61 Only the bits indicated by GrBackendEffectFactory::k
EffectKeyBits are |
69 guaranteed to match the value produced by GenKey(); | 62 guaranteed to match the value produced by GenKey(); |
70 @param outputColor A predefined vec4 in the FS in which the stage shoul
d place its output | 63 @param outputColor A predefined vec4 in the FS in which the stage shoul
d place its output |
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97 const char* name() const { return fFactory.name(); } | 90 const char* name() const { return fFactory.name(); } |
98 | 91 |
99 static EffectKey GenTextureKey(const GrDrawEffect&, const GrGLCaps&); | 92 static EffectKey GenTextureKey(const GrDrawEffect&, const GrGLCaps&); |
100 static EffectKey GenAttribKey(const GrDrawEffect& stage); | 93 static EffectKey GenAttribKey(const GrDrawEffect& stage); |
101 | 94 |
102 protected: | 95 protected: |
103 const GrBackendEffectFactory& fFactory; | 96 const GrBackendEffectFactory& fFactory; |
104 }; | 97 }; |
105 | 98 |
106 #endif | 99 #endif |
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