1991-2006
Silicon Graphics, Inc.
gluCheckExtension
3G

# gluCheckExtension

determines if an extension name is supported

## C Specification

                    GLboolean gluCheckExtension
                    const GLubyte * extName
                    const GLubyte * extString

## Parameters

`extName`

  Specifies an extension name.

`extString`

  Specifies a space-separated list of extension names supported.

## Description

`gluCheckExtension` returns `GLU_TRUE` if `extName` is supported otherwise `GLU_FALSE` is returned.

This is used to check for the presence for OpenGL, GLU, or GLX extension names by passing the extension strings returned by glGetString, gluGetString, glXGetClientString, glXQueryExtensionsString, or glXQueryServerString, respectively, as `extString`.

## Notes

Cases where one extension name is a substring of another are correctly handled.

There may or may not be leading or trailing blanks in `extString`.

Extension names should not contain embedded spaces.

All strings are null-terminated.

## See Also

gluGetString, glGetString, glXGetClientString, glXQueryExtensionsString, glXQueryServerString

## 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/.