From: Visuwesh <visuweshm@gmail.com>
To: Eli Zaretskii <eliz@gnu.org>
Cc: 54646@debbugs.gnu.org
Subject: bug#54646: 29.0.50; set-fontset-font and font clipping issues
Date: Thu, 31 Mar 2022 20:37:10 +0530 [thread overview]
Message-ID: <87lewqjh41.fsf@gmail.com> (raw)
In-Reply-To: <837d8a6wm7.fsf@gnu.org> (Eli Zaretskii's message of "Thu, 31 Mar 2022 17:10:40 +0300")
[வியாழன் மார்ச் 31, 2022] Eli Zaretskii wrote:
>> From: Visuwesh <visuweshm@gmail.com>
>> Cc: 54646@debbugs.gnu.org
>> Date: Thu, 31 Mar 2022 19:14:23 +0530
>>
>> I compiled an Emacs that is linked against HarfBuzz 3.3.2, and it shows
>> the same problem.
>
> The latest version of HarfBuzz is 4.2.0, although the chances that
> it's their problem are not great.
>
>> I managed to reproduce this in an emacs -Q session with that evaled but
>> it took me some time [*]. For each buffer that has Tamil text, I have
>> to zoom in (or none in the case of eww's header-line) different amounts
>> to see the clipping issue:
>>
>> · In init.el, I have to zoom in 7x times
>> · In eww, I have to zoom in 1x time
>> · In dired, I have to zoom in ~15x times
>>
>> In the problematic emacs -Q session, current-iso639-language is 'en'.
>>
>> [*] As in, it literally took me half an hour to observe the issue, and I
>> cannot seem to figure out a quick way to reproduce it.
>
> Can you provide a recipe, as in: what file or URL to visit and/or what
> text to insert before starting the zoom commands? Also, do you zoom
> in and out repeatedly, or just zoom in that many time? And if it just
> takes a small number of zoom commands, why do you say it takes half an
> hour? what else needs to happen during that time to see the
> problematic display?
>
It looks like I was mistaken about the time it takes to reproduce; I was
simply not observant enough. Here's a recipe that reliably reproduces
the problem,
1. emacs -Q
2. M-: (set-fontset-font t 'tamil "Kurinto Seri")
3. M-s M-w https://www.dinamalar.com/news_detail.asp?id=2996410
4. C-x C-+ a bunch of times and look for clipped text. Sometimes
this does not reproduce the first time, so you end up having to
zoom out and in a few times.
> Thanks.
From the other mail:
> One more question: does this happen only with that particular font
> used for Tamil?
I tried Meera Inmai, Noto Serif Tamil, Noto Sans Tamil, Catamaran,
Kurinto Seri. Out of which only Noto Serif and Kurinto Seri shows the
problem. Maybe it is a font issue after all? but (Ungoogled) Chromium
which uses harfbuzz AFAICT renders the text just fine.
next prev parent reply other threads:[~2022-03-31 15:07 UTC|newest]
Thread overview: 53+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-03-31 3:37 bug#54646: 29.0.50; set-fontset-font and font clipping issues Visuwesh
2022-03-31 5:34 ` Eli Zaretskii
2022-03-31 7:03 ` Visuwesh
2022-03-31 7:11 ` Eli Zaretskii
2022-03-31 7:35 ` Visuwesh
2022-03-31 8:45 ` Visuwesh
2022-03-31 9:04 ` Eli Zaretskii
2022-03-31 9:29 ` Visuwesh
2022-03-31 9:41 ` Eli Zaretskii
2022-03-31 12:16 ` Visuwesh
2022-03-31 14:04 ` Eli Zaretskii
2022-03-31 13:44 ` Visuwesh
2022-03-31 14:10 ` Eli Zaretskii
2022-03-31 14:12 ` Eli Zaretskii
2022-03-31 15:07 ` Visuwesh [this message]
2022-03-31 16:49 ` Eli Zaretskii
2022-03-31 17:38 ` Robert Pluim
2022-04-01 1:05 ` Visuwesh
2022-04-01 3:08 ` Visuwesh
2022-04-01 8:49 ` Robert Pluim
2022-04-01 10:54 ` Eli Zaretskii
2022-04-01 11:38 ` Visuwesh
2022-04-01 12:14 ` Eli Zaretskii
2022-04-01 13:10 ` Visuwesh
2022-04-01 14:19 ` Eli Zaretskii
2022-04-01 14:58 ` Visuwesh
2022-04-01 15:27 ` Eli Zaretskii
2022-04-01 16:40 ` Visuwesh
2022-04-01 17:58 ` Eli Zaretskii
2022-04-03 9:15 ` Visuwesh
2022-04-03 10:06 ` Eli Zaretskii
2022-04-03 10:26 ` Visuwesh
2022-04-03 10:50 ` Eli Zaretskii
2022-04-03 11:10 ` Visuwesh
2022-04-21 14:50 ` Visuwesh
2022-04-22 7:23 ` Eli Zaretskii
2022-04-22 10:46 ` Visuwesh
2022-04-22 10:48 ` Eli Zaretskii
2022-06-11 13:54 ` Visuwesh
2022-06-12 1:34 ` Po Lu via Bug reports for GNU Emacs, the Swiss army knife of text editors
2022-06-12 5:55 ` Eli Zaretskii
2022-06-12 4:49 ` Visuwesh
2022-06-12 5:53 ` Eli Zaretskii
2022-06-12 7:47 ` Visuwesh
2022-06-12 10:16 ` Po Lu via Bug reports for GNU Emacs, the Swiss army knife of text editors
2022-10-08 11:48 ` Visuwesh
2022-10-08 12:42 ` Eli Zaretskii
2022-10-08 12:53 ` Visuwesh
2022-10-08 13:00 ` Eli Zaretskii
2022-10-09 11:31 ` Po Lu via Bug reports for GNU Emacs, the Swiss army knife of text editors
2022-10-09 11:59 ` Visuwesh
2022-03-31 7:48 ` Eli Zaretskii
2022-03-31 8:47 ` Visuwesh
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