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

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• Hash : cccf2b00
  Author :
  Date : 2017-07-05T14:50:54
  

  Reorganize AST traversal utility code
  
  Define TIntermTraverser and TIntermLValueTrackingTraverser in a
  separate header file. hash() function is moved out from
  TIntermTraverser as it is not related to the core functionality
  of traversing and transforming ASTs.
  
  Also reorganize some traversers to follow common conventions:
  
  - Intermediate output is now in OutputTree.h/.cpp
  - Max tree depth check is now in IsASTDepthBelowLimit.h/.cpp
  
  BUG=angleproject:1490
  TEST=angle_unittests
  
  Change-Id: Id4968aa9d4e24d0c5bac90dc147fc9f310de0184
  Reviewed-on: https://chromium-review.googlesource.com/559531
  Reviewed-by: Jamie Madill <jmadill@chromium.org>
  Reviewed-by: Corentin Wallez <cwallez@chromium.org>
  Commit-Queue: Olli Etuaho <oetuaho@nvidia.com>
  

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• 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/IntermTraverse.h"
  
  #include "compiler/translator/Pragma.h"
  
  namespace sh
  {
  
  static const int GLSL_VERSION_110 = 110;
  static const int GLSL_VERSION_120 = 120;
  static const int GLSL_VERSION_130 = 130;
  static const int GLSL_VERSION_140 = 140;
  static const int GLSL_VERSION_150 = 150;
  static const int GLSL_VERSION_330 = 330;
  static const int GLSL_VERSION_400 = 400;
  static const int GLSL_VERSION_410 = 410;
  static const int GLSL_VERSION_420 = 420;
  static const int GLSL_VERSION_430 = 430;
  static const int GLSL_VERSION_440 = 440;
  static const int GLSL_VERSION_450 = 450;
  
  int ShaderOutputTypeToGLSLVersion(ShShaderOutput output);
  
  // 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, const TPragma &pragma, ShShaderOutput output);
  
      // If output is core profile, returns 150.
      // If output is legacy profile,
      //   Returns 120 if the following is used the shader:
      //   - "invariant",
      //   - "gl_PointCoord",
      //   - matrix/matrix constructors
      //   - array "out" parameters
      //   Else 110 is returned.
      int getVersion() const { return mVersion; }
  
      void visitSymbol(TIntermSymbol *node) override;
      bool visitAggregate(Visit, TIntermAggregate *node) override;
      bool visitInvariantDeclaration(Visit, TIntermInvariantDeclaration *node) override;
      bool visitFunctionPrototype(Visit, TIntermFunctionPrototype *node) override;
      bool visitDeclaration(Visit, TIntermDeclaration *node) override;
  
    private:
      void ensureVersionIsAtLeast(int version);
  
      int mVersion;
  };
  
  }  // namespace sh
  
  #endif  // COMPILER_TRANSLATOR_VERSIONGLSL_H_
  

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