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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 GrGLShaderBuilder_DEFINED | 8 #ifndef GrGLSLShaderBuilder_DEFINED |
9 #define GrGLShaderBuilder_DEFINED | 9 #define GrGLSLShaderBuilder_DEFINED |
10 | 10 |
11 #include "GrAllocator.h" | 11 #include "GrAllocator.h" |
12 #include "glsl/GrGLSLShaderVar.h" | 12 #include "glsl/GrGLSLShaderVar.h" |
13 #include "SkTDArray.h" | 13 #include "SkTDArray.h" |
14 | 14 |
15 #include <stdarg.h> | 15 #include <stdarg.h> |
16 | 16 |
17 class GrGLSLProgramBuilder; | 17 class GrGLSLProgramBuilder; |
18 class GrGLSLTextureSampler; | 18 class GrGLSLTextureSampler; |
19 | 19 |
20 /** | 20 /** |
21 base class for all shaders builders | 21 base class for all shaders builders |
22 */ | 22 */ |
23 class GrGLShaderBuilder { | 23 class GrGLSLShaderBuilder { |
24 public: | 24 public: |
25 GrGLShaderBuilder(GrGLSLProgramBuilder* program); | 25 GrGLSLShaderBuilder(GrGLSLProgramBuilder* program); |
26 virtual ~GrGLShaderBuilder() {} | 26 virtual ~GrGLSLShaderBuilder() {} |
27 | 27 |
28 void addInput(const GrGLSLShaderVar& input) { fInputs.push_back(input); } | 28 void addInput(const GrGLSLShaderVar& input) { fInputs.push_back(input); } |
29 void addOutput(const GrGLSLShaderVar& output) { fOutputs.push_back(output);
} | 29 void addOutput(const GrGLSLShaderVar& output) { fOutputs.push_back(output);
} |
30 | 30 |
31 /* | 31 /* |
32 * We put texture lookups in the base class because it is TECHNICALLY possib
le to do texture | 32 * We put texture lookups in the base class because it is TECHNICALLY possib
le to do texture |
33 * lookups in any kind of shader. However, for the time being using these c
alls on non-fragment | 33 * lookups in any kind of shader. However, for the time being using these c
alls on non-fragment |
34 * shaders will result in a shader compilation error as texture sampler unif
orms are only | 34 * shaders will result in a shader compilation error as texture sampler unif
orms are only |
35 * visible to the fragment shader. It would not be hard to change this beha
vior, if someone | 35 * visible to the fragment shader. It would not be hard to change this beha
vior, if someone |
36 * actually wants to do texture lookups in a non-fragment shader | 36 * actually wants to do texture lookups in a non-fragment shader |
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102 /* | 102 /* |
103 * Get parent builder for adding uniforms | 103 * Get parent builder for adding uniforms |
104 */ | 104 */ |
105 GrGLSLProgramBuilder* getProgramBuilder() { return fProgramBuilder; } | 105 GrGLSLProgramBuilder* getProgramBuilder() { return fProgramBuilder; } |
106 | 106 |
107 /** | 107 /** |
108 * Helper for begining and ending a block in the shader code. | 108 * Helper for begining and ending a block in the shader code. |
109 */ | 109 */ |
110 class ShaderBlock { | 110 class ShaderBlock { |
111 public: | 111 public: |
112 ShaderBlock(GrGLShaderBuilder* builder) : fBuilder(builder) { | 112 ShaderBlock(GrGLSLShaderBuilder* builder) : fBuilder(builder) { |
113 SkASSERT(builder); | 113 SkASSERT(builder); |
114 fBuilder->codeAppend("{"); | 114 fBuilder->codeAppend("{"); |
115 } | 115 } |
116 | 116 |
117 ~ShaderBlock() { | 117 ~ShaderBlock() { |
118 fBuilder->codeAppend("}"); | 118 fBuilder->codeAppend("}"); |
119 } | 119 } |
120 private: | 120 private: |
121 GrGLShaderBuilder* fBuilder; | 121 GrGLSLShaderBuilder* fBuilder; |
122 }; | 122 }; |
123 | 123 |
124 protected: | 124 protected: |
125 typedef GrTAllocator<GrGLSLShaderVar> VarArray; | 125 typedef GrTAllocator<GrGLSLShaderVar> VarArray; |
126 void appendDecls(const VarArray& vars, SkString* out) const; | 126 void appendDecls(const VarArray& vars, SkString* out) const; |
127 | 127 |
128 /* | 128 /* |
129 * A general function which enables an extension in a shader if the feature
bit is not present | 129 * A general function which enables an extension in a shader if the feature
bit is not present |
130 */ | 130 */ |
131 void addFeature(uint32_t featureBit, const char* extensionName); | 131 void addFeature(uint32_t featureBit, const char* extensionName); |
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191 VarArray fOutputs; | 191 VarArray fOutputs; |
192 uint32_t fFeaturesAddedMask; | 192 uint32_t fFeaturesAddedMask; |
193 SkSTArray<1, SkString> fLayoutParams[kLastInterfaceQualifier + 1]; | 193 SkSTArray<1, SkString> fLayoutParams[kLastInterfaceQualifier + 1]; |
194 int fCodeIndex; | 194 int fCodeIndex; |
195 bool fFinalized; | 195 bool fFinalized; |
196 | 196 |
197 friend class GrGLProgramBuilder; | 197 friend class GrGLProgramBuilder; |
198 friend class GrGLPathProgramBuilder; // to access fInputs. | 198 friend class GrGLPathProgramBuilder; // to access fInputs. |
199 }; | 199 }; |
200 #endif | 200 #endif |
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