If filename is the name of an FDB file (i.e., it ends in ".fdb"), load the font definition found in said file. Otherwise, create a browser-defined font reference.
FDB ("font definition block") is a very simple wrapper for the SWF DefineFont2 block which contains a full description of a font. One may create FDB files from SWT Generator template files with the included makefdb utility- look in the util directory off the main ming distribution directory.
Browser-defined fonts don't contain any information about the font other than its name. It is assumed that the font definition will be provided by the movie player. The fonts _serif, _sans, and _typewriter should always be available. For example:
<?php
$f = newSWFFont("_sans");
?>
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swffont() returns a reference to the font definition, for use in the SWFText->setFont() and the SWFTextField->setFont() methods.
SWFFont has the following methods : swffont->getwidth().