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Diffstat (limited to 'src/3rdparty/angle/src/compiler/VersionGLSL.h')
-rw-r--r-- | src/3rdparty/angle/src/compiler/VersionGLSL.h | 56 |
1 files changed, 56 insertions, 0 deletions
diff --git a/src/3rdparty/angle/src/compiler/VersionGLSL.h b/src/3rdparty/angle/src/compiler/VersionGLSL.h new file mode 100644 index 0000000000..1c1cb1ab97 --- /dev/null +++ b/src/3rdparty/angle/src/compiler/VersionGLSL.h @@ -0,0 +1,56 @@ +// +// Copyright (c) 2002-2010 The ANGLE Project Authors. All rights reserved. +// Use of this source code is governed by a BSD-style license that can be +// found in the LICENSE file. +// + +#ifndef COMPILER_VERSIONGLSL_H_ +#define COMPILER_VERSIONGLSL_H_ + +#include "GLSLANG/ShaderLang.h" +#include "compiler/intermediate.h" + +// Traverses the intermediate tree to return the minimum GLSL version +// required to legally access all built-in features used in the shader. +// GLSL 1.1 which is mandated by OpenGL 2.0 provides: +// - #version and #extension to declare version and extensions. +// - built-in functions refract, exp, and log. +// - updated step() to compare x < edge instead of x <= edge. +// GLSL 1.2 which is mandated by OpenGL 2.1 provides: +// - many changes to reduce differences when compared to the ES specification. +// - invariant keyword and its support. +// - c++ style name hiding rules. +// - built-in variable gl_PointCoord for fragment shaders. +// - matrix constructors taking matrix as argument. +// - array as "out" function parameters +// +class TVersionGLSL : public TIntermTraverser { +public: + TVersionGLSL(ShShaderType type); + + // Returns 120 if the following is used the shader: + // - "invariant", + // - "gl_PointCoord", + // - matrix/matrix constructors + // - array "out" parameters + // Else 110 is returned. + int getVersion() { return mVersion; } + + virtual void visitSymbol(TIntermSymbol*); + virtual void visitConstantUnion(TIntermConstantUnion*); + virtual bool visitBinary(Visit, TIntermBinary*); + virtual bool visitUnary(Visit, TIntermUnary*); + virtual bool visitSelection(Visit, TIntermSelection*); + virtual bool visitAggregate(Visit, TIntermAggregate*); + virtual bool visitLoop(Visit, TIntermLoop*); + virtual bool visitBranch(Visit, TIntermBranch*); + +protected: + void updateVersion(int version); + +private: + ShShaderType mShaderType; + int mVersion; +}; + +#endif // COMPILER_VERSIONGLSL_H_ |