gluCheckExtension
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## Name

gluCheckExtension — determines if an extension name is supported

## C Specification

`GLboolean `gluCheckExtension`` | `(` | `const GLubyte *`extName`, const GLubyte *`extString`);`

## Python Specification

``gluCheckExtension`` | `(` | ``extName`, `extString`) → `boolean``

## Parameters

`extName`
  Specifies an extension name.
`extString`
  Specifies a space-separated list of extension names supported.

## Description

`gluCheckExtension` returns `GL_TRUE` if `extName` is supported otherwise `GL_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

glGetString, gluGetString, glXGetClientString, glXQueryExtensionsString, glXQueryServerString

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