最終更新:2018-12-26 (水) 11:16:40 (300d)  

MESA_GL_VERSION_OVERRIDE はてなブックマークを見る
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changes the value returned by glGetString(GL_VERSION?) and possibly the GL API type.

https://www.mesa3d.org/envvars.html

  • The format should be MAJOR.MINOR[FC|COMPAT]
  • FC is an optional suffix that indicates a forward compatible context. This is only valid for versions >= 3.0.
  • COMPAT is an optional suffix that indicates a compatibility context or GL_ARB_compatibility support. This is only valid for versions >= 3.1.
  • GL versions <= 3.0 are set to a compatibility (non-Core) profile
  • GL versions = 3.1, depending on the driver, it may or may not have the ARB_compatibility extension enabled.
  • GL versions >= 3.2 are set to a Core profile
  • Examples: 2.1, 3.0, 3.0FC, 3.1, 3.1FC, 3.1COMPAT, X.Y, X.YFC, X.YCOMPAT.
    • 2.1 - select a compatibility (non-Core) profile with GL version 2.1.
    • 3.0 - select a compatibility (non-Core) profile with GL version 3.0.
    • 3.0FC - select a Core+Forward Compatible profile with GL version 3.0.
    • 3.1 - select GL version 3.1 with GL_ARB_compatibility enabled per the driver default.
    • 3.1FC - select GL version 3.1 with forward compatibility and GL_ARB_compatibility disabled.
    • 3.1COMPAT - select GL version 3.1 with GL_ARB_compatibility enabled.
    • X.Y - override GL version to X.Y without changing the profile.
    • X.YFC - select a Core+Forward Compatible profile with GL version X.Y.
    • X.YCOMPAT - select a Compatibility profile with GL version X.Y.
  • Mesa may not really implement all the features of the given version. (for developers only)

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