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 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!0);
exit(1);
}

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