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

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• Hash : 05b6b7fc
  Author :
  Date : 2015-03-02T17:08:09
  

  Add an SH_GLSL_CORE_OUTPUT profile.
  
  So we could generate shaders for Apple using core GL profile.
  
  By switching to core profile, we still pass most WebGL conformance tests 1.0.2 on Linux, but not all, so apparently more work is needed.
  
  However, I think it's OK to check this CL in because this output profile will be only used behind a chromium switch.
  
  BUG=angleproject:933
  TEST=webgl conformance tests
  
  Change-Id: Iad70e1aebf82349d3fc5f4116c1d6bc4448193fd
  Reviewed-on: https://chromium-review.googlesource.com/255282
  Tested-by: Zhenyao Mo <zmo@chromium.org>
  Reviewed-by: Jamie Madill <jmadill@chromium.org>
  

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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/IntermNode.h"
  
  #include "compiler/translator/Pragma.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, 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() { return mVersion; }
  
      virtual void visitSymbol(TIntermSymbol *);
      virtual bool visitAggregate(Visit, TIntermAggregate *);
  
    protected:
      void updateVersion(int version);
  
    private:
      int mVersion;
  };
  
  #endif  // COMPILER_TRANSLATOR_VERSIONGLSL_H_
  

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