1.1 --- /dev/null Thu Jan 01 00:00:00 1970 +0000
1.2 +++ b/gfx/angle/src/compiler/VersionGLSL.h Wed Dec 31 06:09:35 2014 +0100
1.3 @@ -0,0 +1,56 @@
1.4 +//
1.5 +// Copyright (c) 2002-2010 The ANGLE Project Authors. All rights reserved.
1.6 +// Use of this source code is governed by a BSD-style license that can be
1.7 +// found in the LICENSE file.
1.8 +//
1.9 +
1.10 +#ifndef COMPILER_VERSIONGLSL_H_
1.11 +#define COMPILER_VERSIONGLSL_H_
1.12 +
1.13 +#include "GLSLANG/ShaderLang.h"
1.14 +#include "compiler/intermediate.h"
1.15 +
1.16 +// Traverses the intermediate tree to return the minimum GLSL version
1.17 +// required to legally access all built-in features used in the shader.
1.18 +// GLSL 1.1 which is mandated by OpenGL 2.0 provides:
1.19 +// - #version and #extension to declare version and extensions.
1.20 +// - built-in functions refract, exp, and log.
1.21 +// - updated step() to compare x < edge instead of x <= edge.
1.22 +// GLSL 1.2 which is mandated by OpenGL 2.1 provides:
1.23 +// - many changes to reduce differences when compared to the ES specification.
1.24 +// - invariant keyword and its support.
1.25 +// - c++ style name hiding rules.
1.26 +// - built-in variable gl_PointCoord for fragment shaders.
1.27 +// - matrix constructors taking matrix as argument.
1.28 +// - array as "out" function parameters
1.29 +//
1.30 +class TVersionGLSL : public TIntermTraverser {
1.31 +public:
1.32 + TVersionGLSL(ShShaderType type);
1.33 +
1.34 + // Returns 120 if the following is used the shader:
1.35 + // - "invariant",
1.36 + // - "gl_PointCoord",
1.37 + // - matrix/matrix constructors
1.38 + // - array "out" parameters
1.39 + // Else 110 is returned.
1.40 + int getVersion() { return mVersion; }
1.41 +
1.42 + virtual void visitSymbol(TIntermSymbol*);
1.43 + virtual void visitConstantUnion(TIntermConstantUnion*);
1.44 + virtual bool visitBinary(Visit, TIntermBinary*);
1.45 + virtual bool visitUnary(Visit, TIntermUnary*);
1.46 + virtual bool visitSelection(Visit, TIntermSelection*);
1.47 + virtual bool visitAggregate(Visit, TIntermAggregate*);
1.48 + virtual bool visitLoop(Visit, TIntermLoop*);
1.49 + virtual bool visitBranch(Visit, TIntermBranch*);
1.50 +
1.51 +protected:
1.52 + void updateVersion(int version);
1.53 +
1.54 +private:
1.55 + ShShaderType mShaderType;
1.56 + int mVersion;
1.57 +};
1.58 +
1.59 +#endif // COMPILER_VERSIONGLSL_H_
