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bug#35721: 27.0.50; Strange Arabic shaping behavior
From: |
Eli Zaretskii |
Subject: |
bug#35721: 27.0.50; Strange Arabic shaping behavior |
Date: |
Thu, 16 May 2019 16:28:10 +0300 |
> From: Behdad Esfahbod <behdad@behdad.org>
> Date: Wed, 15 May 2019 16:02:19 -0700
> Cc: contovob@tcd.ie, Kenichi Handa <handa@gnu.org>,
> Khaled Hosny <dr.khaled.hosny@gmail.com>, 35721@debbugs.gnu.org
>
> Pretty much things you said: if font is not mono-spaced, there's nothing we
> can do.
Thanks. Let me be sure I understand what you are saying. If I invoke
hb-view like this:
hb-view -u 0x0634 -O png -o sheen.png DejaVuSansMono.ttf
then the result is the following PNG image:
sheen.png
Description: PNG image
Do I understand you correctly that this is the expected result with
that font? Because what Emacs displays, even without HarfBuzz as its
shaping engine, looks exactly like that: the leftmost part of the
letter is off-screen.
> Also, if you don't pass neighboring context text to HarfBuzz, again,
> nothing we can do.
I believe this is about the other part: displaying text which is
partially selected, when selection is shown as a different background
color. You are saying that to do its job, a shaping engine needs to
see the entire text, not just the part which has the same colors.
Right?
Thanks again for your comments.
- bug#35721: 27.0.50; Strange Arabic shaping behavior, Basil L. Contovounesios, 2019/05/13
- bug#35721: 27.0.50; Strange Arabic shaping behavior, Eli Zaretskii, 2019/05/14
- bug#35721: 27.0.50; Strange Arabic shaping behavior, Eli Zaretskii, 2019/05/14
- bug#35721: 27.0.50; Strange Arabic shaping behavior, Behdad Esfahbod, 2019/05/15
- bug#35721: 27.0.50; Strange Arabic shaping behavior,
Eli Zaretskii <=
- bug#35721: 27.0.50; Strange Arabic shaping behavior, Khaled Hosny, 2019/05/16
- bug#35721: 27.0.50; Strange Arabic shaping behavior, Eli Zaretskii, 2019/05/16
- bug#35721: 27.0.50; Strange Arabic shaping behavior, Khaled Hosny, 2019/05/16
- bug#35721: 27.0.50; Strange Arabic shaping behavior, Eli Zaretskii, 2019/05/16
- bug#35721: 27.0.50; Strange Arabic shaping behavior, Basil L. Contovounesios, 2019/05/16
- bug#35721: 27.0.50; Strange Arabic shaping behavior, Eli Zaretskii, 2019/05/17
- bug#35721: 27.0.50; Strange Arabic shaping behavior, Basil L. Contovounesios, 2019/05/20
bug#35721: 27.0.50; Strange Arabic shaping behavior, Basil L. Contovounesios, 2019/05/16