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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 "GrGLShaderBuilder.h" | 13 #include "GrGLShaderBuilder.h" |
13 #include "GrGLShaderVar.h" | 14 #include "GrGLShaderVar.h" |
14 #include "GrGLSL.h" | 15 #include "GrGLSL.h" |
15 | 16 |
16 class GrGLTexture; | 17 class GrGLTexture; |
17 | 18 |
18 /** @file | 19 /** @file |
19 This file contains specializations for OpenGL of the shader stages declared
in | 20 This file contains specializations for OpenGL of the shader stages declared
in |
20 include/gpu/GrEffect.h. Objects of type GrGLEffect are responsible for emitt
ing the | 21 include/gpu/GrEffect.h. Objects of type GrGLEffect are responsible for emitt
ing the |
21 GLSL code that implements a GrEffect and for uploading uniforms at draw time
. If they don't | 22 GLSL code that implements a GrEffect and for uploading uniforms at draw time
. If they don't |
22 always emit the same GLSL code, they must have a function: | 23 always emit the same GLSL code, they must have a function: |
23 static inline EffectKey GenKey(const GrDrawEffect&, const GrGLCaps&) | 24 static inline EffectKey GenKey(const GrDrawEffect&, const GrGLCaps&) |
24 that is used to implement a program cache. When two GrEffects produce the sa
me key this means | 25 that is used to implement a program cache. When two GrEffects produce the sa
me key this means |
25 that their GrGLEffects would emit the same GLSL code. | 26 that their GrGLEffects would emit the same GLSL code. |
26 | 27 |
27 The GrGLEffect subclass must also have a constructor of the form: | 28 The GrGLEffect subclass must also have a constructor of the form: |
28 EffectSubclass::EffectSubclass(const GrBackendEffectFactory&, const GrDr
awEffect&) | 29 EffectSubclass::EffectSubclass(const GrBackendEffectFactory&, const GrDr
awEffect&) |
29 The effect held by the GrDrawEffect is guaranteed to be of the type that gen
erated the | 30 The effect held by the GrDrawEffect is guaranteed to be of the type that gen
erated the |
30 GrGLEffect subclass instance. | 31 GrGLEffect subclass instance. |
31 | 32 |
32 These objects are created by the factory object returned by the GrEffect::ge
tFactory(). | 33 These objects are created by the factory object returned by the GrEffect::ge
tFactory(). |
33 */ | 34 */ |
34 | 35 |
35 class GrDrawEffect; | 36 class GrDrawEffect; |
36 | 37 |
37 class GrGLEffect { | 38 class GrGLEffect { |
38 | 39 |
39 public: | 40 public: |
40 typedef GrBackendEffectFactory::EffectKey EffectKey; | 41 typedef GrBackendEffectFactory::EffectKey EffectKey; |
| 42 typedef GrGLProgramEffects::TransformedCoordsArray TransformedCoordsArray; |
| 43 typedef GrGLProgramEffects::TextureSamplerArray TextureSamplerArray; |
41 | 44 |
42 enum { | 45 enum { |
43 kNoEffectKey = GrBackendEffectFactory::kNoEffectKey, | 46 kNoEffectKey = GrBackendEffectFactory::kNoEffectKey, |
44 // the number of bits in EffectKey available to GenKey | 47 // the number of bits in EffectKey available to GenKey |
45 kEffectKeyBits = GrBackendEffectFactory::kEffectKeyBits, | 48 kEffectKeyBits = GrBackendEffectFactory::kEffectKeyBits, |
46 }; | 49 }; |
47 | 50 |
48 typedef GrGLShaderBuilder::TransformedCoordsArray TransformedCoordsArray; | 51 GrGLEffect(const GrBackendEffectFactory& factory) : fFactory(factory) {} |
49 typedef GrGLShaderBuilder::TextureSamplerArray TextureSamplerArray; | |
50 | 52 |
51 GrGLEffect(const GrBackendEffectFactory&); | 53 virtual ~GrGLEffect() {} |
52 | |
53 virtual ~GrGLEffect(); | |
54 | 54 |
55 /** Called when the program stage should insert its code into the shaders. T
he code in each | 55 /** 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 | 56 shader will be in its own block ({}) and so locally scoped names will no
t collide across |
57 stages. | 57 stages. |
58 | 58 |
59 @param builder Interface used to emit code in the shaders. | 59 @param builder Interface used to emit code in the shaders. |
60 @param drawEffect A wrapper on the effect that generated this program
stage. | 60 @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. | 61 @param key The key that was computed by GenKey() from the gener
ating GrEffect. |
62 Only the bits indicated by GrBackendEffectFactory::k
EffectKeyBits are | 62 Only the bits indicated by GrBackendEffectFactory::k
EffectKeyBits are |
63 guaranteed to match the value produced by GenKey(); | 63 guaranteed to match the value produced by GenKey(); |
(...skipping 16 matching lines...) Expand all Loading... |
80 const TransformedCoordsArray& coords, | 80 const TransformedCoordsArray& coords, |
81 const TextureSamplerArray& samplers) = 0; | 81 const TextureSamplerArray& samplers) = 0; |
82 | 82 |
83 /** A GrGLEffect instance can be reused with any GrEffect that produces the
same stage | 83 /** A GrGLEffect instance can be reused with any GrEffect that produces the
same stage |
84 key; this function reads data from a stage and uploads any uniform varia
bles required | 84 key; this function reads data from a stage and uploads any uniform varia
bles required |
85 by the shaders created in emitCode(). The GrEffect installed in the GrEf
fectStage is | 85 by the shaders created in emitCode(). The GrEffect installed in the GrEf
fectStage is |
86 guaranteed to be of the same type that created this GrGLEffect and to ha
ve an identical | 86 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 | 87 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 | 88 to consider whether the GrEffectStage's coord change matrix should be us
ed. When explicit |
89 local coordinates are used it can be ignored. */ | 89 local coordinates are used it can be ignored. */ |
90 virtual void setData(const GrGLUniformManager&, const GrDrawEffect&); | 90 virtual void setData(const GrGLUniformManager&, const GrDrawEffect&) {} |
91 | 91 |
92 const char* name() const { return fFactory.name(); } | 92 const char* name() const { return fFactory.name(); } |
93 | 93 |
94 static inline EffectKey GenKey(const GrDrawEffect&, const GrGLCaps&) { retur
n 0; } | 94 static inline EffectKey GenKey(const GrDrawEffect&, const GrGLCaps&) { retur
n 0; } |
95 | 95 |
96 static EffectKey GenTextureKey(const GrDrawEffect&, const GrGLCaps&); | |
97 static EffectKey GenTransformKey(const GrDrawEffect&); | |
98 static EffectKey GenAttribKey(const GrDrawEffect& stage); | |
99 | |
100 protected: | 96 protected: |
101 const GrBackendEffectFactory& fFactory; | 97 const GrBackendEffectFactory& fFactory; |
102 }; | 98 }; |
103 | 99 |
104 #endif | 100 #endif |
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