#40 Support for OpenGL 3+ core profile


Right now GLEW on OpenGL 3+ core profile is totally broken, as it still uses glGetString for extensions; this patch fixes that by constructing a simple open adressing hashset with all of the extensions from glGetStringi and uses that hashset for any further lookups.

1 Attachments


  • Nigel Stewart

    Nigel Stewart - 2013-08-23
    • Group: Misc --> 1.10.1
  • Nigel Stewart

    Nigel Stewart - 2014-02-20
    • Group: 1.10.1 --> 1.10.2
  • Nigel Stewart

    Nigel Stewart - 2014-02-20

    Deferring, for now.

  • Joerg

    Joerg - 2014-09-18

    Any update on this issue? In SuperTuxKart we apparently just had the same problem, and need to include a patched version of glew, which doesn't make linux package maintainers happy.

  • Edward Rudd

    Edward Rudd - 2014-11-21

    I have a reworked version of this patch that supports GLEW_MX and tested on Win+Mac+Linux. However, the issue exists is that in a core context only extensions not in CORE are provided.. Thus things like ARB_vertex_array_object are not in the extension list as they are CORE in OGL 3.0+.. So GLEW doesn't load those functions at all. So, even with this patch you still need to specify glewExperimental = GL_TRUE;

    To get those functions loading there are a few options.. All of which require parsing the registry/xml/gl.xml to note what functions and extensions are in glcore.
    1) "stuff" the extension hash with the other extensions
    2) simply add those extra functions into the GL_VERSION init method.
    3) adjust the calling of the ext load functions so that they also check if the GL_VERSION_X_X is specified.

  • Edward Rudd

    Edward Rudd - 2014-11-21

    I've reworked it so core extensions are now properly loaded. it's a mix of 2 & 3. All my changes based on master are here.


    Comments are welcome.. I'll be using these changes in an upcoming mac+linux port I'm working on.

  • Nigel Stewart

    Nigel Stewart - 2016-07-09
    • status: open --> closed
    • assigned_to: Nigel Stewart
    • Group: 1.10.2 --> 2.0.0
  • Nigel Stewart

    Nigel Stewart - 2016-07-09

    Fixed in the upcoming GLEW 2.0.0 release. Closing this.
    Thanks for the report.


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