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

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• Author : Shahbaz Youssefi
  Date : 2019-12-03 11:10:06
  Hash : 249cb200
  Message : Translator: Rename TIntermInvariantDeclaration to ..GlobalQualifier.. This is to support the upcoming `precise` keyword. Bug: angleproject:3569 Change-Id: Idbcc8fd6f261757dbbf81b381e7a2dae938d8101 Reviewed-on: https://chromium-review.googlesource.com/c/angle/angle/+/1947451 Reviewed-by: Jamie Madill <jmadill@chromium.org> Commit-Queue: Jamie Madill <jmadill@chromium.org>

• src/compiler/translator/VersionGLSL.h

• //
  // Copyright 2002 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/tree_util/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 visitGlobalQualifierDeclaration(Visit, TIntermGlobalQualifierDeclaration *node) override;
      void visitFunctionPrototype(TIntermFunctionPrototype *node) override;
      bool visitDeclaration(Visit, TIntermDeclaration *node) override;
  
    private:
      void ensureVersionIsAtLeast(int version);
  
      int mVersion;
  };
  
  }  // namespace sh
  
  #endif  // COMPILER_TRANSLATOR_VERSIONGLSL_H_