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/.