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<H1>glutExtensionSupported</H1>
Section: GLUT (3GLUT)<BR>Updated: 3.7<BR><A HREF="#index">Index</A>
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<H2>NAME</H2>
glutExtensionSupported - helps to easily determine whether a
given OpenGL extension is supported.
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<H2>SYNTAX</H2>
<PRE>
int glutExtensionSupported(char *extension);
</PRE>
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<H2>ARGUMENTS</H2>
<DL COMPACT>
<DT><I>extension</I><DD>
Name of OpenGL extension.
</DL>
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<H2>DESCRIPTION</H2>
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 glGetString(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
glutExtensionSupported.
glutExtensionSupported only returns information about OpenGL
extensions only. This means window system dependent extensions (for
example, GLX extensions) are not reported by
glutExtensionSupported.
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<H2>EXAMPLE</H2>
Here is an example of using glutExtensionSupported:
<PRE>
if (!glutExtensionSupported("GL_EXT_texture")) {
fprintf(stderr, "Missing the texture extension!\n");
<A HREF="?1+exit">exit</A>(1);
}
</PRE>
Notice that the name argument includes both the GL prefix and the
extension family prefix (EXT).
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<H2>SEE ALSO</H2>
glutGet, glGetString
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<H2>AUTHOR</H2>
Mark J. Kilgard (<A HREF="mailto:mjk@nvidia.com">mjk@nvidia.com</A>)
<P>
<HR>
<A NAME="index"> </A><H2>Index</H2>
<DL>
<DT><A HREF="#lbAB">NAME</A><DD>
<DT><A HREF="#lbAC">SYNTAX</A><DD>
<DT><A HREF="#lbAD">ARGUMENTS</A><DD>
<DT><A HREF="#lbAE">DESCRIPTION</A><DD>
<DT><A HREF="#lbAF">EXAMPLE</A><DD>
<DT><A HREF="#lbAG">SEE ALSO</A><DD>
<DT><A HREF="#lbAH">AUTHOR</A><DD>
</DL>
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Time: 19:05:09 GMT, September 15, 2003
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