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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 |
11 #include "GrBackendEffectFactory.h" | 11 #include "GrBackendEffectFactory.h" |
12 #include "GrGLProgramEffects.h" | 12 #include "GrGLProgramEffects.h" |
13 #include "GrGLShaderBuilder.h" | 13 #include "GrGLShaderBuilder.h" |
14 #include "GrGLShaderVar.h" | 14 #include "GrGLShaderVar.h" |
15 #include "GrGLSL.h" | 15 #include "GrGLSL.h" |
16 | 16 |
17 class GrGLTexture; | |
18 | |
19 /** @file | 17 /** @file |
20 This file contains specializations for OpenGL of the shader stages declared
in | 18 This file contains specializations for OpenGL of the shader stages declared
in |
21 include/gpu/GrEffect.h. Objects of type GrGLEffect are responsible for emitt
ing the | 19 include/gpu/GrEffect.h. Objects of type GrGLEffect are responsible for emitt
ing the |
22 GLSL code that implements a GrEffect and for uploading uniforms at draw time
. If they don't | 20 GLSL code that implements a GrEffect and for uploading uniforms at draw time
. If they don't |
23 always emit the same GLSL code, they must have a function: | 21 always emit the same GLSL code, they must have a function: |
24 static inline EffectKey GenKey(const GrDrawEffect&, const GrGLCaps&) | 22 static inline EffectKey GenKey(const GrDrawEffect&, const GrGLCaps&) |
25 that is used to implement a program cache. When two GrEffects produce the sa
me key this means | 23 that is used to implement a program cache. When two GrEffects produce the sa
me key this means |
26 that their GrGLEffects would emit the same GLSL code. | 24 that their GrGLEffects would emit the same GLSL code. |
27 | 25 |
28 The GrGLEffect subclass must also have a constructor of the form: | 26 The GrGLEffect subclass must also have a constructor of the form: |
29 EffectSubclass::EffectSubclass(const GrBackendEffectFactory&, const GrDr
awEffect&) | 27 EffectSubclass::EffectSubclass(const GrBackendEffectFactory&, const GrDr
awEffect&) |
30 The effect held by the GrDrawEffect is guaranteed to be of the type that gen
erated the | 28 The effect held by the GrDrawEffect is guaranteed to be of the type that gen
erated the |
31 GrGLEffect subclass instance. | 29 GrGLEffect subclass instance. |
32 | 30 |
33 These objects are created by the factory object returned by the GrEffect::ge
tFactory(). | 31 These objects are created by the factory object returned by the GrEffect::ge
tFactory(). |
34 */ | 32 */ |
35 | 33 |
36 class GrDrawEffect; | 34 class GrDrawEffect; |
| 35 class GrGLTexture; |
| 36 class GrGLVertexEffect; |
37 | 37 |
38 class GrGLEffect { | 38 class GrGLEffect { |
39 | 39 |
40 public: | 40 public: |
41 typedef GrBackendEffectFactory::EffectKey EffectKey; | 41 typedef GrBackendEffectFactory::EffectKey EffectKey; |
42 typedef GrGLProgramEffects::TransformedCoordsArray TransformedCoordsArray; | 42 typedef GrGLProgramEffects::TransformedCoordsArray TransformedCoordsArray; |
43 typedef GrGLProgramEffects::TextureSamplerArray TextureSamplerArray; | 43 typedef GrGLProgramEffects::TextureSamplerArray TextureSamplerArray; |
44 | 44 |
45 enum { | 45 enum { |
46 kNoEffectKey = GrBackendEffectFactory::kNoEffectKey, | 46 kNoEffectKey = GrBackendEffectFactory::kNoEffectKey, |
47 // the number of bits in EffectKey available to GenKey | 47 // the number of bits in EffectKey available to GenKey |
48 kEffectKeyBits = GrBackendEffectFactory::kEffectKeyBits, | 48 kEffectKeyBits = GrBackendEffectFactory::kEffectKeyBits, |
49 }; | 49 }; |
50 | 50 |
51 GrGLEffect(const GrBackendEffectFactory& factory) : fFactory(factory) {} | 51 GrGLEffect(const GrBackendEffectFactory& factory) |
| 52 : fFactory(factory) |
| 53 , fIsVertexEffect(false) { |
| 54 } |
52 | 55 |
53 virtual ~GrGLEffect() {} | 56 virtual ~GrGLEffect() {} |
54 | 57 |
55 /** Called when the program stage should insert its code into the shaders. T
he code in each | 58 /** Called when the program stage should insert its code into the shaders. T
he code in each |
56 shader will be in its own block ({}) and so locally scoped names will no
t collide across | 59 shader will be in its own block ({}) and so locally scoped names will no
t collide across |
57 stages. | 60 stages. |
58 | 61 |
59 @param builder Interface used to emit code in the shaders. | 62 @param builder Interface used to emit code in the shaders. |
60 @param drawEffect A wrapper on the effect that generated this program
stage. | 63 @param drawEffect A wrapper on the effect that generated this program
stage. |
61 @param key The key that was computed by GenKey() from the gener
ating GrEffect. | 64 @param key The key that was computed by GenKey() from the gener
ating GrEffect. |
(...skipping 24 matching lines...) Expand all Loading... |
86 guaranteed to be of the same type that created this GrGLEffect and to ha
ve an identical | 89 guaranteed to be of the same type that created this GrGLEffect and to ha
ve an identical |
87 EffectKey as the one that created this GrGLEffect. Effects that use loca
l coords have | 90 EffectKey as the one that created this GrGLEffect. Effects that use loca
l coords have |
88 to consider whether the GrEffectStage's coord change matrix should be us
ed. When explicit | 91 to consider whether the GrEffectStage's coord change matrix should be us
ed. When explicit |
89 local coordinates are used it can be ignored. */ | 92 local coordinates are used it can be ignored. */ |
90 virtual void setData(const GrGLUniformManager&, const GrDrawEffect&) {} | 93 virtual void setData(const GrGLUniformManager&, const GrDrawEffect&) {} |
91 | 94 |
92 const char* name() const { return fFactory.name(); } | 95 const char* name() const { return fFactory.name(); } |
93 | 96 |
94 static inline EffectKey GenKey(const GrDrawEffect&, const GrGLCaps&) { retur
n 0; } | 97 static inline EffectKey GenKey(const GrDrawEffect&, const GrGLCaps&) { retur
n 0; } |
95 | 98 |
| 99 /** Used by the system when generating shader code, to see if this effect ca
n be downcasted to |
| 100 the internal GrGLVertexEffect type */ |
| 101 bool isVertexEffect() const { return fIsVertexEffect; } |
| 102 |
96 protected: | 103 protected: |
97 const GrBackendEffectFactory& fFactory; | 104 const GrBackendEffectFactory& fFactory; |
| 105 |
| 106 private: |
| 107 friend class GrGLVertexEffect; // to set fIsVertexEffect |
| 108 |
| 109 bool fIsVertexEffect; |
98 }; | 110 }; |
99 | 111 |
100 #endif | 112 #endif |
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