VersionGLSL.h (2711B)
1 // 2 // Copyright 2002 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_TRANSLATOR_VERSIONGLSL_H_ 8 #define COMPILER_TRANSLATOR_VERSIONGLSL_H_ 9 10 #include "compiler/translator/tree_util/IntermTraverse.h" 11 12 #include "compiler/translator/Pragma.h" 13 14 namespace sh 15 { 16 17 static const int GLSL_VERSION_110 = 110; 18 static const int GLSL_VERSION_120 = 120; 19 static const int GLSL_VERSION_130 = 130; 20 static const int GLSL_VERSION_140 = 140; 21 static const int GLSL_VERSION_150 = 150; 22 static const int GLSL_VERSION_330 = 330; 23 static const int GLSL_VERSION_400 = 400; 24 static const int GLSL_VERSION_410 = 410; 25 static const int GLSL_VERSION_420 = 420; 26 static const int GLSL_VERSION_430 = 430; 27 static const int GLSL_VERSION_440 = 440; 28 static const int GLSL_VERSION_450 = 450; 29 30 int ShaderOutputTypeToGLSLVersion(ShShaderOutput output); 31 32 // Traverses the intermediate tree to return the minimum GLSL version 33 // required to legally access all built-in features used in the shader. 34 // GLSL 1.1 which is mandated by OpenGL 2.0 provides: 35 // - #version and #extension to declare version and extensions. 36 // - built-in functions refract, exp, and log. 37 // - updated step() to compare x < edge instead of x <= edge. 38 // GLSL 1.2 which is mandated by OpenGL 2.1 provides: 39 // - many changes to reduce differences when compared to the ES specification. 40 // - invariant keyword and its support. 41 // - c++ style name hiding rules. 42 // - built-in variable gl_PointCoord for fragment shaders. 43 // - matrix constructors taking matrix as argument. 44 // - array as "out" function parameters 45 // 46 // TODO: ES3 equivalent versions of GLSL 47 class TVersionGLSL : public TIntermTraverser 48 { 49 public: 50 TVersionGLSL(sh::GLenum type, const TPragma &pragma, ShShaderOutput output); 51 52 // If output is core profile, returns 150. 53 // If output is legacy profile, 54 // Returns 120 if the following is used the shader: 55 // - "invariant", 56 // - "gl_PointCoord", 57 // - matrix/matrix constructors 58 // - array "out" parameters 59 // Else 110 is returned. 60 int getVersion() const { return mVersion; } 61 62 void visitSymbol(TIntermSymbol *node) override; 63 bool visitAggregate(Visit, TIntermAggregate *node) override; 64 bool visitGlobalQualifierDeclaration(Visit, TIntermGlobalQualifierDeclaration *node) override; 65 void visitFunctionPrototype(TIntermFunctionPrototype *node) override; 66 bool visitDeclaration(Visit, TIntermDeclaration *node) override; 67 68 private: 69 void ensureVersionIsAtLeast(int version); 70 71 int mVersion; 72 }; 73 74 } // namespace sh 75 76 #endif // COMPILER_TRANSLATOR_VERSIONGLSL_H_