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1 /* | 1 /* |
2 * Copyright 2012 Google Inc. | 2 * Copyright 2013 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 GrGLFragmentProcessor_DEFINED |
9 #define GrGLProcessor_DEFINED | 9 #define GrGLFragmentProcessor_DEFINED |
10 | 10 |
11 #include "GrGLProgramDataManager.h" | 11 #include "GrGLProgramDataManager.h" |
12 #include "GrProcessor.h" | 12 #include "GrGLProcessor.h" |
13 #include "GrTextureAccess.h" | 13 #include "GrTextureAccess.h" |
14 | 14 |
15 /** @file | |
16 This file contains specializations for OpenGL of the shader stages declared
in | |
17 include/gpu/GrProcessor.h. Objects of type GrGLProcessor are responsible for
emitting the | |
18 GLSL code that implements a GrProcessor and for uploading uniforms at draw t
ime. If they don't | |
19 always emit the same GLSL code, they must have a function: | |
20 static inline void GenKey(const GrProcessor&, const GrGLSLCaps&, GrProce
ssorKeyBuilder*) | |
21 that is used to implement a program cache. When two GrProcessors produce the
same key this means | |
22 that their GrGLProcessors would emit the same GLSL code. | |
23 | |
24 The GrGLProcessor subclass must also have a constructor of the form: | |
25 ProcessorSubclass::ProcessorSubclass(const GrBackendProcessorFactory&, c
onst GrProcessor&) | |
26 | |
27 These objects are created by the factory object returned by the GrProcessor:
:getFactory(). | |
28 */ | |
29 // TODO delete this and make TextureSampler its own thing | |
30 class GrGLProcessor { | |
31 public: | |
32 typedef GrGLProgramDataManager::UniformHandle UniformHandle; | |
33 | |
34 /** | |
35 * Passed to GrGLProcessors so they can add transformed coordinates to their
shader code. | |
36 */ | |
37 typedef GrShaderVar TransformedCoords; | |
38 typedef SkTArray<GrShaderVar> TransformedCoordsArray; | |
39 | |
40 /** | |
41 * Passed to GrGLProcessors so they can add texture reads to their shader co
de. | |
42 */ | |
43 class TextureSampler { | |
44 public: | |
45 TextureSampler(UniformHandle uniform, const GrTextureAccess& access) | |
46 : fSamplerUniform(uniform) | |
47 , fConfigComponentMask(GrPixelConfigComponentMask(access.getTexture(
)->config())) { | |
48 SkASSERT(0 != fConfigComponentMask); | |
49 memcpy(fSwizzle, access.getSwizzle(), 5); | |
50 } | |
51 | |
52 // bitfield of GrColorComponentFlags present in the texture's config. | |
53 uint32_t configComponentMask() const { return fConfigComponentMask; } | |
54 // this is .abcd | |
55 const char* swizzle() const { return fSwizzle; } | |
56 | |
57 private: | |
58 UniformHandle fSamplerUniform; | |
59 uint32_t fConfigComponentMask; | |
60 char fSwizzle[5]; | |
61 | |
62 friend class GrGLShaderBuilder; | |
63 }; | |
64 | |
65 typedef SkTArray<TextureSampler> TextureSamplerArray; | |
66 }; | |
67 | |
68 class GrGLFPBuilder; | 15 class GrGLFPBuilder; |
69 | 16 |
70 class GrGLFragmentProcessor { | 17 class GrGLFragmentProcessor { |
71 public: | 18 public: |
72 GrGLFragmentProcessor() {} | 19 GrGLFragmentProcessor() {} |
73 | 20 |
74 virtual ~GrGLFragmentProcessor() {} | 21 virtual ~GrGLFragmentProcessor() {} |
75 | 22 |
76 typedef GrGLProgramDataManager::UniformHandle UniformHandle; | 23 typedef GrGLProgramDataManager::UniformHandle UniformHandle; |
77 typedef GrGLProcessor::TransformedCoordsArray TransformedCoordsArray; | 24 typedef GrGLProcessor::TransformedCoordsArray TransformedCoordsArray; |
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111 // TODO update this to pass in GrFragmentProcessor | 58 // TODO update this to pass in GrFragmentProcessor |
112 virtual void setData(const GrGLProgramDataManager&, const GrProcessor&) {} | 59 virtual void setData(const GrGLProgramDataManager&, const GrProcessor&) {} |
113 | 60 |
114 static void GenKey(const GrProcessor&, const GrGLSLCaps&, GrProcessorKeyBuil
der*) {} | 61 static void GenKey(const GrProcessor&, const GrGLSLCaps&, GrProcessorKeyBuil
der*) {} |
115 | 62 |
116 private: | 63 private: |
117 typedef GrGLProcessor INHERITED; | 64 typedef GrGLProcessor INHERITED; |
118 }; | 65 }; |
119 | 66 |
120 #endif | 67 #endif |
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