1991-2006 Silicon Graphics, Inc.
glXQueryExtension 3G
glXQueryExtension indicate whether the GLX extension is supported

## C Specification

Bool `glXQueryExtension` Display * dpy int * errorBase int * eventBase

## Parameters

dpy

  Specifies the connection to the X server.

errorBase

  Returns the base error code of the GLX server extension.

eventBase

  Returns the base event code of the GLX server extension.

## Description

`glXQueryExtension` returns `True` if the X server of connection dpy supports the GLX extension, `False` otherwise. If `True` is returned, then errorBase and eventBase return the error base and event base of the GLX extension. These values should be added to the constant error and event values to determine the actual event or error values. Otherwise, errorBase and eventBase are unchanged.

errorBase and eventBase do not return values if they are specified as `NULL`.

## See Also

glXQueryVersion

## Copyright

Copyright 1991-2006 Silicon Graphics, Inc. This document is licensed under the SGI Free Software B License. For details, see http://oss.sgi.com/projects/FreeB/.