On 14 Mar 2012, at 17:57, Heiko Oberdiek wrote: > On Wed, Mar 14, 2012 at 07:43:45PM +0200, Tobias Schoel wrote: > >> Could one test if ff and f\/f are equal with tex-primitives? > > If the width of the single characters differ to the ligture, > then you can put both versions in boxes and compare the widths.
Rather than a ligature, there might be a kerning pair. Or a contextual alternate of one (or both) of the characters. You can't reliably identify the presence of ligatures by detecting differences in box widths. JK -------------------------------------------------- Subscriptions, Archive, and List information, etc.: http://tug.org/mailman/listinfo/xetex
