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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 GrBackendEffectFactory_DEFINED | 8 #ifndef GrBackendEffectFactory_DEFINED |
9 #define GrBackendEffectFactory_DEFINED | 9 #define GrBackendEffectFactory_DEFINED |
10 | 10 |
11 #include "GrTypes.h" | 11 #include "GrTypes.h" |
12 #include "SkTemplates.h" | 12 #include "SkTemplates.h" |
13 #include "SkThread_platform.h" | 13 #include "SkThread_platform.h" |
14 #include "GrNoncopyable.h" | 14 #include "GrNoncopyable.h" |
15 | 15 |
16 /** Given a GrEffect of a particular type, creates the corresponding graphics-ba
ckend-specific | 16 /** Given a GrEffect of a particular type, creates the corresponding graphics-ba
ckend-specific |
17 effect object. Also tracks equivalence of shaders generated via a key. Each
factory instance | 17 effect object. Also tracks equivalence of shaders generated via a key. Each
factory instance |
18 is assigned a generation ID at construction. The ID of the return of GrEffec
t::getFactory() | 18 is assigned a generation ID at construction. The ID of the return of GrEffec
t::getFactory() |
19 is used as a type identifier. Thus a GrEffect subclass must return a singlet
on from | 19 is used as a type identifier. Thus a GrEffect subclass must return a singlet
on from |
20 getFactory(). GrEffect subclasses should use the derived class GrTBackendEff
ectFactory that is | 20 getFactory(). GrEffect subclasses should use the derived class GrTBackendEff
ectFactory that is |
21 templated on the GrEffect subclass as their factory object. It requires that
the GrEffect | 21 templated on the GrEffect subclass as their factory object. It requires that
the GrEffect |
22 subclass has a nested class (or typedef) GLEffect which is its GL implementa
tion and a subclass | 22 subclass has a nested class (or typedef) GLEffect which is its GL implementa
tion and a subclass |
23 of GrGLEffect. | 23 of GrGLEffect. |
24 */ | 24 */ |
25 | 25 |
26 class GrEffectRef; | 26 class GrEffectRef; |
27 class GrEffectStage; | |
28 class GrGLEffect; | 27 class GrGLEffect; |
29 class GrGLCaps; | 28 class GrGLCaps; |
| 29 class GrDrawEffect; |
30 | 30 |
31 class GrBackendEffectFactory : public GrNoncopyable { | 31 class GrBackendEffectFactory : public GrNoncopyable { |
32 public: | 32 public: |
33 typedef uint32_t EffectKey; | 33 typedef uint32_t EffectKey; |
34 enum { | 34 enum { |
35 kNoEffectKey = 0, | 35 kNoEffectKey = 0, |
36 kEffectKeyBits = 12, | 36 kEffectKeyBits = 16, |
37 /** | 37 /** |
38 * Some aspects of the generated code may be determined by the particula
r textures that are | 38 * Some aspects of the generated code may be determined by the particula
r textures that are |
39 * associated with the effect. These manipulations are performed by GrGL
ShaderBuilder beyond | 39 * associated with the effect. These manipulations are performed by GrGL
ShaderBuilder beyond |
40 * GrGLEffects' control. So there is a dedicated part of the key which i
s combined | 40 * GrGLEffects' control. So there is a dedicated part of the key which i
s combined |
41 * automatically with the bits produced by GrGLEffect::GenKey(). | 41 * automatically with the bits produced by GrGLEffect::GenKey(). |
42 */ | 42 */ |
43 kTextureKeyBits = 6, | 43 kTextureKeyBits = 6, |
44 kAttribKeyBits = 6 | 44 kAttribKeyBits = 6 |
45 }; | 45 }; |
46 | 46 |
47 virtual EffectKey glEffectKey(const GrEffectStage&, const GrGLCaps&) const =
0; | 47 virtual EffectKey glEffectKey(const GrDrawEffect&, const GrGLCaps&) const =
0; |
48 virtual GrGLEffect* createGLInstance(const GrEffectRef&) const = 0; | 48 virtual GrGLEffect* createGLInstance(const GrDrawEffect&) const = 0; |
49 | 49 |
50 bool operator ==(const GrBackendEffectFactory& b) const { | 50 bool operator ==(const GrBackendEffectFactory& b) const { |
51 return fEffectClassID == b.fEffectClassID; | 51 return fEffectClassID == b.fEffectClassID; |
52 } | 52 } |
53 bool operator !=(const GrBackendEffectFactory& b) const { | 53 bool operator !=(const GrBackendEffectFactory& b) const { |
54 return !(*this == b); | 54 return !(*this == b); |
55 } | 55 } |
56 | 56 |
57 virtual const char* name() const = 0; | 57 virtual const char* name() const = 0; |
58 | 58 |
(...skipping 19 matching lines...) Expand all Loading... |
78 return static_cast<EffectKey>(id); | 78 return static_cast<EffectKey>(id); |
79 } | 79 } |
80 | 80 |
81 EffectKey fEffectClassID; | 81 EffectKey fEffectClassID; |
82 | 82 |
83 private: | 83 private: |
84 static int32_t fCurrEffectClassID; | 84 static int32_t fCurrEffectClassID; |
85 }; | 85 }; |
86 | 86 |
87 #endif | 87 #endif |
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