Re: Tamil fonts

[Eli Zaretskii]

> From: समीर सिंह Sameer Singh <lumarzeli30@gmail.com>
> Date: Fri, 3 Jun 2022 17:46:10 +0530
> Cc: Werner LEMBERG <wl@gnu.org>, emacs-devel@gnu.org, Visuwesh 
> <visuweshm@gmail.com>
> 
> Great! I will send them in two different bug reports.

Thanks.

> I think we should also warn users that if they are trying to change the tamil 
> font in their init.el, they should use
> codepoints instead of the script name,
> in the (set-fontset-font) function, because if their font does not support 
> the supplement characters, they will
> once more be displayed as "tofu".

How is this different from any other font that supports only part of
the script's characters?  Many Unicode blocks have "supplement" parts,
and there's nothing to assure a user that a font which supports the
representative characters will necessarily support all of the others.
Users should be prepared to deal with such problems when they happen,
and there's no way Emacs could warn them about every possible case,
since there are too many fonts out there.

(Personally, I find it strange that a Tamil font doesn't support the
Supplement block, and even more strange that Google created a separate
font instead of extending an existing one.  Perhaps this is because
the Tamil Supplement block is relatively new.)