[XeTeX] problem rendering unicode Devanagari dependent vowel signs and ligatures

[David J. Perry]

Remember that Mac and Windows/Linux use two completely different 
technologies to display complex scripts: OS X uses Apple's own AAT fonts, 
while the other two major platforms use OpenType.  I've noticed some 
confusion, even among people on this list, about this issue.  If you are 
comparing font performance, make sure that you are comparing apples to 
apples.  Devanagari MT, for instance, is an AAT font; not only would it be 
illegal to copy it to a Windows machine, but it would not work at all! 
Apple added OT support for Arabic in 10.5, but Hebrew and the Indic scripts 
still require AAT (except for the word processor Mellel and the Middle 
Eastern versions of Adobe products such as InDesign, which use OT).

Xe(La)Tex, via fontspec, is unique in being able to use either OT or AAT 
fonts on a Mac.

David

----- Original Message ----- 
From: "Leo Brouwer" <singhadaya at googlemail.com>
To: "Unicode-based TeX for Mac OS X and other platforms" <xetex at tug.org>
Sent: Thursday, February 03, 2011 2:20 AM
Subject: Re: [XeTeX] problem rendering unicode Devanagari dependent vowel 
signs and ligatures


>
> Yes, I've wondered about this also. Most of the fonts that don't work in
> XeTex display correct conjuncts in word processors, web browsers, etc., so
> it does seem to be something specific about Xetex that's causing the fonts
> to malfunction.
>
> Sincerely,
>
> Leo Brouwer
>


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