[XeTeX] List of ligatures in a font

Heiko Oberdiek heiko.oberdiek at googlemail.com
Wed Mar 14 18:57:49 CET 2012

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.
In case of a ligature this does not necessarily mean that
the output file contains a ligature glyph. It could be
a fake ligature at TeX level that get replaced by something
else, e.g. by using virtual fonts.

Yours sincerely
  Heiko Oberdiek

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