kc3-lang/angle/src/compiler/translator/VersionGLSL.h

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• Author : Jamie Madill
  Date : 2014-08-19 15:23:24
  Hash : b1a85f48
  Message : Rename compiler intermediate source files. This prevents confusion between "TIntermediate" and "TIntermNode". BUG=angle:711 Change-Id: Ib7a086382a479db3f77bf2ab06ce321aa7b35d13 Reviewed-on: https://chromium-review.googlesource.com/212936 Tested-by: Jamie Madill <jmadill@chromium.org> Reviewed-by: Zhenyao Mo <zmo@chromium.org> Reviewed-by: Nicolas Capens <capn@chromium.org>

• src/compiler/translator/VersionGLSL.h

• //
  // Copyright (c) 2002-2013 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_TRANSLATOR_VERSIONGLSL_H_
  #define COMPILER_TRANSLATOR_VERSIONGLSL_H_
  
  #include "compiler/translator/IntermNode.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
  //
  // TODO: ES3 equivalent versions of GLSL
  class TVersionGLSL : public TIntermTraverser
  {
    public:
      TVersionGLSL(sh::GLenum 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 bool visitAggregate(Visit, TIntermAggregate *);
  
    protected:
      void updateVersion(int version);
  
    private:
      int mVersion;
  };
  
  #endif  // COMPILER_TRANSLATOR_VERSIONGLSL_H_