[XeTeX] Zapfino
Sebastian Schubert
sebastian-schubert at gmx.de
Thu Jul 12 00:36:11 CEST 2007
Adam Twardoch <list.adam at twardoch.com> writes:
> Bruno, thanks for the corrected links.
>
> Since I developed the OpenType Layout features for the font in question
> (Zapfino Extra Pro), it's a matter that seems very interesting to me.
>
> The contextual logic in Zapfino Extra Pro performs backtrack and
> lookahead lookups that go as far as 6 glyphs across, including the space
> character. Unfortunately, different OpenType Layout engines treat the
> space character differently -- some Layout engines execute OpenType
> lookups on an entire line of text while some only execute OpenType
> lookups word-by-word. I may be mistaken but I am under the impression
> that XeTeX currently executes OpenType lookups word-by-word, i.e. as if
> each word were a separate line of text. This means that lookups such as
> the ones I develop that reach across to surrounding words do not work at
> all.
>
> Please make a simple test: type the word "Mutter" three times after each
> other, i.e.:
>
> Mutter Mutter Mutter
>
> In InDesign, you should get three different renderings of that word.
> What's the result in XeTeX?
It seems you are right. See
http://home.arcor.de/sebschub/mutter.pdf
(link tested ;) )
Sebastian
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