C SPECIFICATION

       int glXQueryContext( Display *dpy,
                            GLXContext ctx,
                            int attribut )
       int glXQueryContext( Display *,
                            GLXContext GLXContext,
                            int int,
                            int * )

PARAMETERS

       Specifies the connection to the X server.

       GLXContext  Specifies a GLX rendering context.

       int         Specifies  that  a  context  parameter should be retrieved.
                   Must  be  one  of  GLX_FBCONFIG_ID,   GLX_RENDER_TYPE,   or
                   GLX_SCREEN.


       Contains the return value for int.

DESCRIPTION

       glXQueryContext  sets   to the value of int with respect to GLXContext.
       int may be one of the following:

       GLX_FBCONFIG_ID       Returns the XID  of  the  GLXFBConfig  associated
                             with GLXContext.

       GLX_RENDER_TYPE       Returns  the  rendering type supported by GLXCon-
                             text.

       GLX_SCREEN            Returns the screen number associated with GLXCon-
                             text.

       Success is returned unless int is not a valid GLX context attribute, in
       which case GLX_BAD_ATTRIBUTE is returned.

       This call may cause a round-trip to the server.

NOTES

       glXQueryContext is available only if the GLX version is 1.3 or greater.

       If  the  GLX version is 1.1 or 1.0, the GL version must be 1.0.  If the
       GLX version is 1.2, then the GL version must be 1.1.  If the  GLX  ver-
       sion is 1.3, then the GL version must be 1.2.

ERRORS

       GLXBadContext is generated if GLXContext does not refer to a valid con-
       text.