From: John Hudson (john@tiro.ca)
Date: Thu Jan 25 2007 - 21:13:50 CST
John H. Jenkins wrote:
> (Which, BTW, is another reason why typographers hate the idea of
> requesting ligatures in Latin text using ZWJ. They have to revamp
> their fonts to support it, and it's a pain.)
For AAT fonts, I presume this to be the case (not sure about Graphite). For OpenType,
there is the option that layout engines could take a similar approach as they do for
Indic, and treat ZWJ as a trigger for applying an OTL feature that would not require a ZWJ
glyph in the lookup input. So, for instance, <f ZWJ i> could be taken as a trigger for all
the ligature features in the font -- <liga> <rlig> <dlig> etc -- looking for an input
match for <f i>.
At the moment, though no layout engine seems to do this, and the mechanism to support ZWJ
ligation relies on the presence of the ZWJ glyph in the input string for the <rlig> feature.
John Hudson
-- Tiro Typeworks www.tiro.com Vancouver, BC john@tiro.ca Marie Antoinette was a woman whose core values were chocolate, sex, love, nature and Japanese ceramics. Frankly, there are worse principles of government than that. - Karen Burshtein
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