glutExtensionSupported - helps to easily determine whether
       a given OpenGL extension is supported.

SYNTAX

       int glutExtensionSupported(char *extension);

ARGUMENTS

       extension Name of OpenGL extension.

DESCRIPTION

       glutExtensionSupported helps to easily determine whether a
       given  OpenGL extension is supported or not. The extension
       parameter names the  extension  to  query.  The  supported
       extensions    can   also   be   determined   with   glGet-
       String(GL_EXTENSIONS), but glutExtensionSupported does the
       correct parsing of the returned string.

       glutExtensionSupported  returns  non-zero if the extension
       is supported, zero if not supported.

       There must be a valid current window  to  call  glutExten-
       sionSupported.

       glutExtensionSupported   only  returns  information  about
       OpenGL extensions only. This means window system dependent
       extensions  (for example, GLX extensions) are not reported
       by glutExtensionSupported.

EXAMPLE

       Here is an example of using glutExtensionSupported:

         if (!glutExtensionSupported("GL_EXT_texture")) {
           fprintf(stderr, "Missing the texture extension!\n");
           exit(1);
         }

       Notice that the name argument includes both the GL  prefix
       and the extension family prefix (EXT).

SEE ALSO

       glutGet, glGetString

AUTHOR

       Mark J. Kilgard (mjk@nvidia.com)