DESCRIPTION
       GL rendering calls made prior to glXWaitGL are guaranteed to be executed
       before X rendering calls made after glXWaitGL.  Although this  same  re‐
       sult  can be achieved using glFinish, glXWaitGL does not require a round
       trip to the server, and it is therefore more efficient  in  cases  where
       client and server are on separate machines.

       glXWaitGL is ignored if there is no current GLX context.

NOTES
       glXWaitGL may or may not flush the X stream.

ERRORS
       GLXBadCurrentWindow  is  generated  if  the drawable associated with the
       current context of the calling thread is a window, and that window is no
       longer valid.

SEE ALSO
       glFinish, glFlush, glXWaitX, XSync

                                                                  GLXWAITGL(3G)