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1 /* | 1 /* |
2 * Copyright 2014 Google Inc. | 2 * Copyright 2014 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 GrGLFragmentShaderBuilder_DEFINED | 8 #ifndef GrGLFragmentShaderBuilder_DEFINED |
9 #define GrGLFragmentShaderBuilder_DEFINED | 9 #define GrGLFragmentShaderBuilder_DEFINED |
10 | 10 |
11 #include "GrGLShaderBuilder.h" | 11 #include "GrGLShaderBuilder.h" |
12 | 12 |
13 class GrGLVarying; | 13 class GrGLVarying; |
14 | 14 |
15 /* | 15 /* |
16 * This base class encapsulates the functionality which the GP uses to build fra
gment shaders | 16 * This base class encapsulates the functionality which the GP uses to build fra
gment shaders |
17 */ | 17 */ |
18 class GrGLGPFragmentBuilder : public GrGLShaderBuilder { | 18 class GrGLFragmentBuilder : public GrGLShaderBuilder { |
19 public: | 19 public: |
20 GrGLGPFragmentBuilder(GrGLProgramBuilder* program) : INHERITED(program) {} | 20 GrGLFragmentBuilder(GrGLProgramBuilder* program) : INHERITED(program) {} |
21 virtual ~GrGLGPFragmentBuilder() {} | 21 virtual ~GrGLFragmentBuilder() {} |
22 /** | 22 /** |
23 * Use of these features may require a GLSL extension to be enabled. Shaders
may not compile | 23 * Use of these features may require a GLSL extension to be enabled. Shaders
may not compile |
24 * if code is added that uses one of these features without calling enableFe
ature() | 24 * if code is added that uses one of these features without calling enableFe
ature() |
25 */ | 25 */ |
26 enum GLSLFeature { | 26 enum GLSLFeature { |
27 kStandardDerivatives_GLSLFeature = 0, | 27 kStandardDerivatives_GLSLFeature = 0, |
28 kLastGLSLFeature = kStandardDerivatives_GLSLFeature | 28 kLastGLSLFeature = kStandardDerivatives_GLSLFeature |
29 }; | 29 }; |
30 | 30 |
31 /** | 31 /** |
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51 friend class GrGLPathProcessor; | 51 friend class GrGLPathProcessor; |
52 | 52 |
53 typedef GrGLShaderBuilder INHERITED; | 53 typedef GrGLShaderBuilder INHERITED; |
54 }; | 54 }; |
55 | 55 |
56 /* | 56 /* |
57 * Fragment processor's, in addition to all of the above, may need to use dst co
lor so they use | 57 * Fragment processor's, in addition to all of the above, may need to use dst co
lor so they use |
58 * this builder to create their shader. Because this is the only shader builder
the FP sees, we | 58 * this builder to create their shader. Because this is the only shader builder
the FP sees, we |
59 * just call it FPShaderBuilder | 59 * just call it FPShaderBuilder |
60 */ | 60 */ |
61 class GrGLFPFragmentBuilder : public GrGLGPFragmentBuilder { | 61 class GrGLXPFragmentBuilder : public GrGLFragmentBuilder { |
62 public: | 62 public: |
63 GrGLFPFragmentBuilder(GrGLProgramBuilder* program) : INHERITED(program) {} | 63 GrGLXPFragmentBuilder(GrGLProgramBuilder* program) : INHERITED(program) {} |
64 | 64 |
65 /** Returns the variable name that holds the color of the destination pixel.
This may be NULL if | 65 /** Returns the variable name that holds the color of the destination pixel.
This may be NULL if |
66 no effect advertised that it will read the destination. */ | 66 no effect advertised that it will read the destination. */ |
67 virtual const char* dstColor() = 0; | 67 virtual const char* dstColor() = 0; |
68 | 68 |
69 private: | 69 private: |
70 typedef GrGLGPFragmentBuilder INHERITED; | 70 typedef GrGLFragmentBuilder INHERITED; |
71 }; | 71 }; |
72 | 72 |
73 // TODO rename to Fragment Builder | 73 // TODO rename to Fragment Builder |
74 class GrGLFragmentShaderBuilder : public GrGLFPFragmentBuilder { | 74 class GrGLFragmentShaderBuilder : public GrGLXPFragmentBuilder { |
75 public: | 75 public: |
76 typedef uint8_t DstReadKey; | 76 typedef uint8_t DstReadKey; |
77 typedef uint8_t FragPosKey; | 77 typedef uint8_t FragPosKey; |
78 | 78 |
79 /** Returns a key for adding code to read the copy-of-dst color in service
of effects that | 79 /** Returns a key for adding code to read the copy-of-dst color in service
of effects that |
80 require reading the dst. It must not return 0 because 0 indicates that t
here is no dst | 80 require reading the dst. It must not return 0 because 0 indicates that t
here is no dst |
81 copy read at all (in which case this function should not be called). */ | 81 copy read at all (in which case this function should not be called). */ |
82 static DstReadKey KeyForDstRead(const GrTexture* dstCopy, const GrGLCaps&); | 82 static DstReadKey KeyForDstRead(const GrTexture* dstCopy, const GrGLCaps&); |
83 | 83 |
84 /** Returns a key for reading the fragment location. This should only be cal
led if there is an | 84 /** Returns a key for reading the fragment location. This should only be cal
led if there is an |
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149 bool fTopLeftFragPosRead; | 149 bool fTopLeftFragPosRead; |
150 int fCustomColorOutputIndex; | 150 int fCustomColorOutputIndex; |
151 | 151 |
152 // some state to verify shaders and effects are consistent, this is reset be
tween effects by | 152 // some state to verify shaders and effects are consistent, this is reset be
tween effects by |
153 // the program creator | 153 // the program creator |
154 bool fHasReadDstColor; | 154 bool fHasReadDstColor; |
155 bool fHasReadFragmentPosition; | 155 bool fHasReadFragmentPosition; |
156 | 156 |
157 friend class GrGLProgramBuilder; | 157 friend class GrGLProgramBuilder; |
158 | 158 |
159 typedef GrGLFPFragmentBuilder INHERITED; | 159 typedef GrGLXPFragmentBuilder INHERITED; |
160 }; | 160 }; |
161 | 161 |
162 #endif | 162 #endif |
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