[HarfBuzz] Rendering of Arabic shadda-kasrah

[Richard Wordingham]

On Wed, 19 Aug 2020 20:09:51 +0300
Eli Zaretskii <eliz at gnu.org> wrote:

> Could someone please look at the discussion and the data of the Emacs
> bug#34035 (https://debbugs.gnu.org/cgi/bugreport.cgi?bug=34035) and
> tell whether the fonts that produce incorrect display are faulty, and
> if so, what is the problem with those fonts?

There is no evidence of a fault.  The TUS claims that
kesra between shadda and the consonant came in with metal type.
Basically, there are two different styles, one with kesra below the
consonant and one with it below the shadda.  I don't have details of
what is preferred where, or its social stratification.

Wright (available at www.ghazali.org/arabic/WrightArabicGrammarVol1.pdf
), in §11 Remark (e) ɡives a slightly different story and some attempt
at an indication of regional variation.

Richard.