PARAMETERS
       name  Specifies  a  symbolic  constant,  one  of GL_VENDOR, GL_RENDERER,
             GL_VERSION, or GL_EXTENSIONS.

DESCRIPTION
       glGetString returns a pointer to a static string describing some  aspect
       of the current GL connection.  name can be one of the following:

       GL_VENDOR           Returns  the  company responsible for this GL imple‐
                           mentation.  This name does not change  from  release
                           to release.

       GL_RENDERER         Returns the name of the renderer.  This name is typ‐
                           ically specific to a particular configuration  of  a
                           hardware  platform.  It does not change from release
                           to release.

       GL_VERSION          Returns a version or release number.

       GL_EXTENSIONS       Returns a space-separated list of  supported  exten‐
                           sions to GL.

       Because the GL does not include queries for the performance characteris‐
       tics of an implementation, some applications are  written  to  recognize
       known  platforms  and  modify  their GL usage based on known performance
       characteristics of these platforms.  Strings GL_VENDOR  and  GL_RENDERER
       together uniquely specify a platform. They do not change from release to
       release and should be used by platform-recognition algorithms.

       Some applications want to make use of features that are not part of  the
       standard  GL.  These  features  may  be implemented as extensions to the
       standard GL.  The GL_EXTENSIONS string is a space-separated list of sup‐
       ported  GL  extensions.   (Extension names never contain a space charac‐
       ter.)

       The GL_VERSION string begins with a version number.  The version  number
       uses one of these forms:

       major_number.minor_number
       major_number.minor_number.release_number

       Vendor-specific  information  may  follow the version number. Its format
       depends on the implementation, but a space always separates the  version
       number and the vendor-specific information.

       All strings are null-terminated.

NOTES
       If an error is generated, glGetString returns 0.

       The  client  and  server  may  support different versions or extensions.