[MPEG-OTSPEC] CSS WG liaison to SC29 on Open Font Format (from Feb. 2020)

[Bobby de Vos]

Greetings,

SIL added a JSTF table to some of our Arabic fonts (Lateef, Harmattan, 
Scheherazade), you can see what was added to Scheherazade below

https://github.com/silnrsi/font-scheherazade/commit/0aa388a0b3a59221f3c13e6b5803215f22bf6655

The commit message says "Add JSTF table to identify possible kashida 
glyphs". I thought this was added (notes from someone else) because when 
justification was turned on in Word, it would break the lam/alef 
ligature by inserting a kashida. But I am unable to actually test this 
at the moment.

Bobby

On 2024-02-21 09:13, John Hudson via mpeg-otspec wrote:
> Simon Cozens attempted an implementation of JSTF table support a few 
> years ago, in an effort to find out whether it was actually 
> implementable. As I recall, he determined that much of it could be 
> implemented, but that there were some holes or things that could be 
> improved. As far as I know, there is no JSTF table support in any 
> shipping software, which I guess at least means we wouldn’t break 
> anything were we to revise the spec to produce something workable for 
> CSS.
>
> JH
>
>
> On 2024-02-20 12:39 pm, Vladimir Levantovsky via mpeg-otspec wrote:
>> The liaison statement I mentioned during today's call can be found here:
>> https://lists.w3.org/Archives/Public/www-archive/2020Feb/att-0005/CSS-SC29-20200113.pdf 
>>
>>
>> One of the aspects mentioned in the CSS WG statement is related to 
>> using cursive elongation for text justification purposes, which may 
>> be desirable for cursive writing and could be essential e.g. for many 
>> Arabic scripts - I am wondering if this can already be accomplished 
>> using JSTF table, and whether the existing specification needs to be 
>> updated to support it.
>>
>> Thanks,
>> Vladimir
>>
>>
>> _______________________________________________
>> mpeg-otspec mailing list
>> mpeg-otspec at lists.aau.at
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>
-- 
Bobby de Vos
/bobby_devos at sil.org/
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