On 11/23/2014 11:49 PM, Stephan Hennig wrote:
Am 23.11.2014 um 19:43 schrieb Hans Hagen:
you can just reconstruct the original from the (nested) ligatures,
I have experimented with code like that. The problem is that triple
ligatures can be broken in two ways:
ffl =>
ff + l Leuchtstofflampe (fluorescent lamp)
f + fl Tiefflieger (low-level attack aircraft)
The former case is easy, since components of the ffl ligature are glyphs
'ff' and 'l'. The second case requires to compose the fl ligature from
raw font information, since it is not readily available. Effectively,
this means implementing a full ligaturing routine. I wouldn't want to
do that. Is there any interface available that given two glyphs returns
a ligature of those glyphs?
that's not the way open type works ... some fonts can turn ffl into the
ffl ligature, others do it stepwise and yet others implement for
instance ff ligatures by kerning two (different) f's, in fact the whole
concept of ligature in open type is a kind of generic substitution and
does not always relate to ligatures .. the feature can be mixed into
other features as well
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