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comparison: gfx/angle/src/compiler/VersionGLSL.h
gfx/angle/src/compiler/VersionGLSL.h
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- TOR_BUG_3246
- changeset 7
- 129ffea94266
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| -1:000000000000 | 0:b6a5ca6eebb5 |
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| 1 // | |
| 2 // Copyright (c) 2002-2010 The ANGLE Project Authors. All rights reserved. | |
| 3 // Use of this source code is governed by a BSD-style license that can be | |
| 4 // found in the LICENSE file. | |
| 5 // | |
| 6 | |
| 7 #ifndef COMPILER_VERSIONGLSL_H_ | |
| 8 #define COMPILER_VERSIONGLSL_H_ | |
| 9 | |
| 10 #include "GLSLANG/ShaderLang.h" | |
| 11 #include "compiler/intermediate.h" | |
| 12 | |
| 13 // Traverses the intermediate tree to return the minimum GLSL version | |
| 14 // required to legally access all built-in features used in the shader. | |
| 15 // GLSL 1.1 which is mandated by OpenGL 2.0 provides: | |
| 16 // - #version and #extension to declare version and extensions. | |
| 17 // - built-in functions refract, exp, and log. | |
| 18 // - updated step() to compare x < edge instead of x <= edge. | |
| 19 // GLSL 1.2 which is mandated by OpenGL 2.1 provides: | |
| 20 // - many changes to reduce differences when compared to the ES specification. | |
| 21 // - invariant keyword and its support. | |
| 22 // - c++ style name hiding rules. | |
| 23 // - built-in variable gl_PointCoord for fragment shaders. | |
| 24 // - matrix constructors taking matrix as argument. | |
| 25 // - array as "out" function parameters | |
| 26 // | |
| 27 class TVersionGLSL : public TIntermTraverser { | |
| 28 public: | |
| 29 TVersionGLSL(ShShaderType type); | |
| 30 | |
| 31 // Returns 120 if the following is used the shader: | |
| 32 // - "invariant", | |
| 33 // - "gl_PointCoord", | |
| 34 // - matrix/matrix constructors | |
| 35 // - array "out" parameters | |
| 36 // Else 110 is returned. | |
| 37 int getVersion() { return mVersion; } | |
| 38 | |
| 39 virtual void visitSymbol(TIntermSymbol*); | |
| 40 virtual void visitConstantUnion(TIntermConstantUnion*); | |
| 41 virtual bool visitBinary(Visit, TIntermBinary*); | |
| 42 virtual bool visitUnary(Visit, TIntermUnary*); | |
| 43 virtual bool visitSelection(Visit, TIntermSelection*); | |
| 44 virtual bool visitAggregate(Visit, TIntermAggregate*); | |
| 45 virtual bool visitLoop(Visit, TIntermLoop*); | |
| 46 virtual bool visitBranch(Visit, TIntermBranch*); | |
| 47 | |
| 48 protected: | |
| 49 void updateVersion(int version); | |
| 50 | |
| 51 private: | |
| 52 ShShaderType mShaderType; | |
| 53 int mVersion; | |
| 54 }; | |
| 55 | |
| 56 #endif // COMPILER_VERSIONGLSL_H_ |
