2 // Copyright (c) 2002-2013 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.
7 #ifndef COMPILER_TRANSLATOR_VERSIONGLSL_H_
8 #define COMPILER_TRANSLATOR_VERSIONGLSL_H_
10 #include "compiler/translator/intermediate.h"
12 // Traverses the intermediate tree to return the minimum GLSL version
13 // required to legally access all built-in features used in the shader.
14 // GLSL 1.1 which is mandated by OpenGL 2.0 provides:
15 // - #version and #extension to declare version and extensions.
16 // - built-in functions refract, exp, and log.
17 // - updated step() to compare x < edge instead of x <= edge.
18 // GLSL 1.2 which is mandated by OpenGL 2.1 provides:
19 // - many changes to reduce differences when compared to the ES specification.
20 // - invariant keyword and its support.
21 // - c++ style name hiding rules.
22 // - built-in variable gl_PointCoord for fragment shaders.
23 // - matrix constructors taking matrix as argument.
24 // - array as "out" function parameters
26 // TODO: ES3 equivalent versions of GLSL
27 class TVersionGLSL : public TIntermTraverser
30 TVersionGLSL(sh::GLenum type);
32 // Returns 120 if the following is used the shader:
35 // - matrix/matrix constructors
36 // - array "out" parameters
37 // Else 110 is returned.
38 int getVersion() { return mVersion; }
40 virtual void visitSymbol(TIntermSymbol *);
41 virtual bool visitAggregate(Visit, TIntermAggregate *);
44 void updateVersion(int version);
50 #endif // COMPILER_TRANSLATOR_VERSIONGLSL_H_