glutExtensionSupported(3GLUT) GLUT glutExtensionSupported(3GLUT)
NAME
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 exten-
sion 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.
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(3), glGetString(3)
AUTHOR
Mark J. Kilgard (mjk@nvidia.com)
GLUT 3.7 glutExtensionSupported(3GLUT)
Mac OS X 10.6 - Generated Thu Sep 17 20:20:39 CDT 2009