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/.