From: Eli Zaretskii <eliz@gnu.org>
To: Lars Ingebrigtsen <larsi@gnus.org>
Cc: emacs-devel@gnu.org
Subject: Re: Ligature support
Date: Sat, 06 Nov 2021 20:34:58 +0200 [thread overview]
Message-ID: <83pmrd9lpp.fsf@gnu.org> (raw)
In-Reply-To: <877ddlcg2p.fsf@gnus.org> (message from Lars Ingebrigtsen on Sat, 06 Nov 2021 19:08:30 +0100)
> From: Lars Ingebrigtsen <larsi@gnus.org>
> Cc: emacs-devel@gnu.org
> Date: Sat, 06 Nov 2021 19:08:30 +0100
>
> Eli Zaretskii <eliz@gnu.org> writes:
>
> > 30% slowdown is already a bad sign.
>
> Oh yeah, it means that we can't just do that. If we want to send
> everything through hb_shape, we'd have to change our display to optimise
> for that case. (Which I'm guessing would be a lot of work.)
We basically need to rethink the entire design of the display engine.
It starts with the basic premise in the design that buffer text is
examined one character at a time, and all the layout decisions for
that character are made before we proceed to the next character. This
already required quite esoteric jumps through hoops to add character
composition (which needs to examine sequences of characters, and when
composable characters are detected, skip them all after processing
them). If we want to pass most or all of the text through the shaping
engine all that needs to go away, and we need something very
different.
next prev parent reply other threads:[~2021-11-06 18:34 UTC|newest]
Thread overview: 342+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-10-25 18:32 Entering emojis Lars Ingebrigtsen
2021-10-25 18:45 ` Eli Zaretskii
2021-10-25 19:21 ` Lars Ingebrigtsen
2021-10-25 19:26 ` Eli Zaretskii
2021-10-25 19:36 ` Lars Ingebrigtsen
2021-10-25 19:40 ` Eli Zaretskii
2021-10-25 19:49 ` Lars Ingebrigtsen
2021-10-25 20:14 ` Gregory Heytings
2021-10-25 20:49 ` Lars Ingebrigtsen
2021-10-26 2:01 ` Howard Melman
2021-10-26 2:29 ` Eli Zaretskii
2021-10-26 3:38 ` Lars Ingebrigtsen
2021-10-26 9:10 ` Stefan Kangas
2021-10-26 11:50 ` Lars Ingebrigtsen
2021-10-26 14:35 ` Lars Ingebrigtsen
2021-10-27 12:18 ` Lars Ingebrigtsen
2021-10-27 13:49 ` Lars Ingebrigtsen
2021-10-26 15:46 ` Stefan Kangas
2021-10-26 16:09 ` Lars Ingebrigtsen
2021-10-26 16:36 ` Lars Ingebrigtsen
2021-10-26 16:42 ` Lars Ingebrigtsen
2021-10-26 16:52 ` Eli Zaretskii
2021-10-26 17:36 ` Lars Ingebrigtsen
2021-10-26 16:49 ` Eli Zaretskii
2021-10-26 17:09 ` Robert Pluim
2021-10-26 17:14 ` Eli Zaretskii
2021-10-26 17:33 ` Lars Ingebrigtsen
2021-10-26 17:39 ` Eli Zaretskii
2021-10-27 12:44 ` Lars Ingebrigtsen
2021-10-26 17:43 ` Lars Ingebrigtsen
2021-10-26 17:54 ` Gregory Heytings
2021-10-26 18:14 ` Lars Ingebrigtsen
2021-10-26 17:55 ` Robert Pluim
2021-10-26 18:08 ` Lars Ingebrigtsen
2021-10-26 17:46 ` Robert Pluim
2021-10-26 17:58 ` Lars Ingebrigtsen
2021-10-26 18:07 ` Robert Pluim
2021-10-26 18:14 ` Lars Ingebrigtsen
2021-10-26 18:18 ` Robert Pluim
2021-10-26 18:24 ` Lars Ingebrigtsen
2021-10-26 19:18 ` describe-char on emoji sequences Lars Ingebrigtsen
2021-10-26 19:28 ` Eli Zaretskii
2021-10-26 19:42 ` Lars Ingebrigtsen
2021-10-27 13:35 ` James Cloos
2021-10-27 13:43 ` Lars Ingebrigtsen
2021-10-27 15:07 ` Andreas Schwab
2021-10-27 15:15 ` Lars Ingebrigtsen
2021-10-27 15:59 ` Robert Pluim
2021-10-27 16:11 ` Andreas Schwab
2021-10-27 16:05 ` Eli Zaretskii
2021-10-27 16:12 ` Andreas Schwab
2021-10-27 16:23 ` Lars Ingebrigtsen
2021-10-27 16:34 ` Andreas Schwab
2021-10-27 16:36 ` Eli Zaretskii
2021-10-27 16:43 ` Andreas Schwab
2021-10-27 17:02 ` Eli Zaretskii
2021-10-27 17:32 ` Robert Pluim
2021-10-27 19:40 ` Andreas Schwab
2021-10-27 19:48 ` Gregory Heytings
2021-10-27 16:26 ` Eli Zaretskii
2021-10-27 16:36 ` Andreas Schwab
2021-10-27 17:08 ` James Cloos
2021-10-27 17:13 ` Eli Zaretskii
2021-10-27 17:36 ` Robert Pluim
2021-10-27 18:23 ` Eli Zaretskii
2021-10-28 7:02 ` James Cloos
2021-10-28 7:46 ` Robert Pluim
2021-10-28 9:34 ` Eli Zaretskii
2021-10-28 9:39 ` Robert Pluim
2021-10-28 9:16 ` Eli Zaretskii
2021-10-28 19:24 ` James Cloos
2021-10-28 19:34 ` Eli Zaretskii
2021-10-28 12:21 ` Richard Stallman
2021-10-28 12:23 ` Lars Ingebrigtsen
2021-10-27 13:49 ` Eli Zaretskii
2021-10-27 13:57 ` Eli Zaretskii
2021-10-27 14:25 ` Lars Ingebrigtsen
2021-10-27 16:30 ` Eli Zaretskii
2021-10-27 17:30 ` T.V Raman
2021-10-28 14:35 ` Lars Ingebrigtsen
2021-10-28 23:17 ` Lars Ingebrigtsen
2021-10-26 16:45 ` Entering emojis Stefan Kangas
2021-10-26 17:34 ` Lars Ingebrigtsen
2021-10-26 18:39 ` William Xu
2021-10-26 19:35 ` Stefan Monnier
2021-10-26 20:41 ` Broken Stefan Kangas
2021-10-26 21:12 ` Entering emojis Stefan Kangas
2021-10-27 1:38 ` Howard Melman
2021-10-27 8:27 ` Mattias Engdegård
2021-10-27 8:51 ` Andreas Schwab
2021-10-27 14:14 ` T.V Raman
2021-10-27 15:14 ` Gregory Heytings
2021-10-27 17:20 ` Eli Zaretskii
2021-10-27 16:01 ` Eli Zaretskii
2021-10-27 17:50 ` Gregory Heytings
2021-10-27 18:27 ` Eli Zaretskii
2021-10-27 18:38 ` Gregory Heytings
2021-10-27 18:41 ` Eli Zaretskii
2021-10-27 18:56 ` Gregory Heytings
2021-10-27 19:15 ` Eli Zaretskii
2021-10-27 19:20 ` Gregory Heytings
2021-10-28 5:56 ` Eli Zaretskii
2021-10-28 6:50 ` Gregory Heytings
2021-10-28 9:11 ` Eli Zaretskii
2021-10-28 9:37 ` Gregory Heytings
2021-10-28 9:39 ` Gregory Heytings
2021-10-28 10:00 ` Eli Zaretskii
2021-10-28 10:05 ` Gregory Heytings
2021-10-28 10:25 ` Gregory Heytings
2021-10-28 10:33 ` Eli Zaretskii
2021-10-28 11:20 ` Gregory Heytings
2021-10-28 13:26 ` Eli Zaretskii
2021-10-28 13:55 ` Gregory Heytings
2021-10-28 16:27 ` Eli Zaretskii
2021-10-28 17:06 ` Gregory Heytings
2021-10-28 17:37 ` Eli Zaretskii
2021-10-28 21:10 ` Gregory Heytings
2021-10-29 7:51 ` Eli Zaretskii
2021-10-29 10:32 ` Gregory Heytings
2021-10-29 10:54 ` Eli Zaretskii
2021-10-28 21:40 ` Lars Ingebrigtsen
2021-10-29 7:31 ` Eli Zaretskii
2021-10-29 12:51 ` Lars Ingebrigtsen
2021-10-29 13:31 ` Eli Zaretskii
2021-11-05 5:04 ` Lars Ingebrigtsen
2021-11-05 7:56 ` Ligature support (was: Entering emojis) Eli Zaretskii
2021-11-05 13:42 ` Ligature support Lars Ingebrigtsen
2021-11-05 14:33 ` Eli Zaretskii
2021-11-05 14:38 ` Lars Ingebrigtsen
2021-11-05 15:14 ` Eli Zaretskii
2021-11-05 15:20 ` Lars Ingebrigtsen
2021-11-05 15:26 ` Lars Ingebrigtsen
2021-11-05 15:40 ` Lars Ingebrigtsen
2021-11-05 16:35 ` Eli Zaretskii
2021-11-05 15:26 ` Eli Zaretskii
2021-11-05 15:37 ` Lars Ingebrigtsen
2021-11-05 15:56 ` Lars Ingebrigtsen
2021-11-05 16:39 ` Eli Zaretskii
2021-11-05 16:34 ` Eli Zaretskii
2021-11-05 16:45 ` Lars Ingebrigtsen
2021-11-05 17:05 ` Yuri Khan
2021-11-05 17:16 ` Lars Ingebrigtsen
2021-11-05 18:54 ` Eli Zaretskii
2021-11-05 22:17 ` Lars Ingebrigtsen
2021-11-06 7:04 ` Eli Zaretskii
2021-11-06 18:02 ` Lars Ingebrigtsen
2021-11-05 20:09 ` Yuri Khan
2021-11-05 22:20 ` Lars Ingebrigtsen
2021-11-06 9:01 ` Yuri Khan
2021-11-05 17:13 ` tomas
2021-11-05 19:14 ` Eli Zaretskii
2021-11-05 19:52 ` tomas
2021-11-05 20:16 ` Werner LEMBERG
2021-11-05 20:18 ` tomas
2021-11-05 20:35 ` Eli Zaretskii
2021-11-05 20:30 ` Eli Zaretskii
2021-11-06 9:16 ` tomas
2021-11-06 9:49 ` Eli Zaretskii
2021-11-05 20:43 ` Stefan Kangas
2021-11-05 20:49 ` Eli Zaretskii
2021-11-05 17:18 ` Lars Ingebrigtsen
2021-11-05 18:55 ` Eli Zaretskii
2021-11-05 19:11 ` Eli Zaretskii
2021-11-05 22:38 ` Lars Ingebrigtsen
2021-11-05 22:50 ` Lars Ingebrigtsen
2021-11-05 23:02 ` Lars Ingebrigtsen
2021-11-06 8:32 ` Eli Zaretskii
2021-11-06 18:08 ` Lars Ingebrigtsen
2021-11-06 18:34 ` Eli Zaretskii [this message]
2021-11-06 5:23 ` Lars Ingebrigtsen
2021-11-06 8:40 ` Eli Zaretskii
2021-11-12 20:28 ` chad
2021-11-15 4:51 ` Richard Stallman
2021-11-15 6:19 ` Stefan Kangas
2021-11-18 3:50 ` Richard Stallman
2021-11-15 12:52 ` Eli Zaretskii
2021-11-06 7:12 ` Eli Zaretskii
2021-11-06 18:05 ` Lars Ingebrigtsen
2021-11-06 18:30 ` Eli Zaretskii
2021-11-06 13:25 ` Benjamin Riefenstahl
2021-11-06 13:34 ` Eli Zaretskii
2021-11-06 17:03 ` Benjamin Riefenstahl
2021-11-06 17:33 ` Eli Zaretskii
2021-10-27 19:23 ` Entering emojis Gregory Heytings
2021-10-28 5:58 ` Eli Zaretskii
2021-10-27 14:16 ` T.V Raman
2021-10-27 12:09 ` Eli Zaretskii
2021-10-27 12:27 ` Robert Pluim
2021-10-27 11:48 ` Eli Zaretskii
2021-10-27 12:36 ` Robert Pluim
2021-10-27 13:07 ` Robert Pluim
2021-10-27 13:09 ` Lars Ingebrigtsen
2021-10-27 13:26 ` Robert Pluim
2021-10-27 13:50 ` Eli Zaretskii
2021-11-08 19:52 ` chad
2021-11-08 19:58 ` Eli Zaretskii
2021-10-27 13:34 ` Eli Zaretskii
2021-10-27 15:12 ` Robert Pluim
2021-10-27 16:08 ` Eli Zaretskii
2021-10-27 17:00 ` Robert Pluim
2021-10-27 13:22 ` Eli Zaretskii
2021-10-27 13:28 ` Robert Pluim
2021-10-27 14:06 ` Stefan Kangas
2021-10-27 14:15 ` Eli Zaretskii
2021-10-27 14:22 ` Stefan Kangas
2021-10-27 15:34 ` Michael Albinus
2021-11-02 23:36 ` Jonas Bernoulli
2021-11-04 6:27 ` Lars Ingebrigtsen
2021-11-04 15:12 ` Jonas Bernoulli
2021-11-04 17:18 ` Lars Ingebrigtsen
2021-11-04 18:34 ` T.V Raman
2021-10-25 19:42 ` Gregory Heytings
2021-10-25 20:10 ` Lars Ingebrigtsen
2021-10-25 20:18 ` Lars Ingebrigtsen
2021-10-25 20:31 ` Lars Ingebrigtsen
2021-10-25 20:36 ` Matthias Meulien
2021-10-26 2:36 ` Eli Zaretskii
2021-10-25 20:54 ` T.V Raman
2021-10-26 21:20 ` Lars Ingebrigtsen
2021-10-26 21:43 ` Stefan Kangas
2021-10-27 12:45 ` Lars Ingebrigtsen
2021-10-27 14:22 ` Stefan Kangas
2021-10-27 12:01 ` Eli Zaretskii
2021-10-27 12:28 ` Lars Ingebrigtsen
2021-10-27 13:19 ` Eli Zaretskii
2021-11-02 23:40 ` Jonas Bernoulli
2021-10-27 14:38 ` Stefan Kangas
2021-10-27 15:40 ` Lars Ingebrigtsen
2021-10-27 17:11 ` Move shorthands.el to lisp/emacs-lisp/? Stefan Kangas
2021-10-28 21:28 ` Lars Ingebrigtsen
2021-10-29 5:31 ` Eli Zaretskii
2021-10-29 9:45 ` Yuri Khan
2021-10-29 10:10 ` Eli Zaretskii
2021-10-29 10:31 ` Yuri Khan
2021-10-29 10:41 ` Eli Zaretskii
2021-10-29 10:51 ` Dmitry Gutov
2021-10-29 12:37 ` Lars Ingebrigtsen
2021-10-27 15:52 ` Entering emojis Eli Zaretskii
2021-10-27 16:27 ` Stefan Kangas
2021-10-27 16:37 ` Eli Zaretskii
2021-10-27 15:56 ` Stefan Monnier
2021-10-27 16:06 ` Lars Ingebrigtsen
2021-10-27 16:20 ` Eli Zaretskii
2021-10-27 16:27 ` Stefan Kangas
2021-10-28 21:27 ` Lars Ingebrigtsen
2021-11-02 23:48 ` Jonas Bernoulli
2021-11-03 1:50 ` T.V Raman
2021-11-04 6:28 ` Lars Ingebrigtsen
2021-10-28 14:14 ` Kévin Le Gouguec
2021-10-28 14:16 ` Lars Ingebrigtsen
2021-10-28 14:31 ` Lars Ingebrigtsen
2021-10-28 14:56 ` Kévin Le Gouguec
2021-10-28 14:59 ` Lars Ingebrigtsen
2021-10-28 15:27 ` Kévin Le Gouguec
2021-10-28 21:43 ` Lars Ingebrigtsen
2021-10-29 9:32 ` Kévin Le Gouguec
2021-10-29 13:03 ` Lars Ingebrigtsen
2021-10-29 15:30 ` Kévin Le Gouguec
2021-10-29 16:01 ` Lars Ingebrigtsen
2021-10-29 16:45 ` Kévin Le Gouguec
2021-10-29 17:18 ` Lars Ingebrigtsen
2021-11-03 0:08 ` Jonas Bernoulli
2021-11-03 16:15 ` Jonas Bernoulli
2021-10-27 17:25 ` Lars Ingebrigtsen
2021-10-28 9:18 ` Lars Ingebrigtsen
2021-10-28 10:33 ` Stefan Kangas
2021-10-28 11:08 ` Lars Ingebrigtsen
2021-10-28 11:19 ` Lars Ingebrigtsen
2021-10-28 12:54 ` Eli Zaretskii
2021-10-28 12:56 ` Lars Ingebrigtsen
2021-10-28 13:32 ` Eli Zaretskii
2021-10-28 13:54 ` Lars Ingebrigtsen
2021-10-28 15:57 ` Eli Zaretskii
2021-10-28 21:49 ` Lars Ingebrigtsen
2021-10-29 5:45 ` Eli Zaretskii
2021-10-29 12:46 ` Lars Ingebrigtsen
2021-10-29 13:30 ` Eli Zaretskii
2021-10-29 13:38 ` Lars Ingebrigtsen
2021-10-29 13:55 ` Eli Zaretskii
2021-10-29 14:12 ` Lars Ingebrigtsen
2021-10-29 14:30 ` Lars Ingebrigtsen
2021-10-29 14:45 ` Lars Ingebrigtsen
2021-10-29 14:53 ` Lars Ingebrigtsen
2021-10-29 16:02 ` Eli Zaretskii
2021-10-29 16:39 ` Lars Ingebrigtsen
2021-10-29 16:01 ` Eli Zaretskii
2021-10-29 16:34 ` Lars Ingebrigtsen
2021-10-29 18:06 ` Eli Zaretskii
2021-10-29 18:23 ` Lars Ingebrigtsen
2021-10-29 19:46 ` Eli Zaretskii
2021-10-29 20:43 ` Lars Ingebrigtsen
2021-10-29 20:57 ` Lars Ingebrigtsen
2021-10-29 21:09 ` Lars Ingebrigtsen
2021-10-29 21:21 ` Lars Ingebrigtsen
2021-10-30 6:08 ` Eli Zaretskii
2021-10-30 7:06 ` Andreas Schwab
2021-11-03 18:56 ` Eli Zaretskii
2021-10-30 12:17 ` Lars Ingebrigtsen
2021-10-28 13:56 ` Robert Pluim
2021-10-28 20:44 ` Stefan Kangas
2021-10-28 21:51 ` Lars Ingebrigtsen
2021-10-28 22:34 ` Stefan Kangas
2021-10-28 22:39 ` Lars Ingebrigtsen
2021-11-03 0:35 ` Jonas Bernoulli
2021-10-28 13:30 ` Eli Zaretskii
2021-10-28 23:37 ` Stefan Kangas
2021-10-28 23:48 ` Lars Ingebrigtsen
2021-10-29 6:10 ` Eli Zaretskii
2021-10-29 6:09 ` Eli Zaretskii
2021-10-29 14:43 ` Stefan Kangas
2021-10-29 16:06 ` Eli Zaretskii
2021-10-29 17:01 ` Stefan Kangas
2022-01-29 10:23 ` Eli Zaretskii
2021-10-29 17:41 ` Daniel Martín
2021-10-29 21:46 ` Lars Ingebrigtsen
2021-10-29 22:16 ` Lars Ingebrigtsen
2021-10-30 6:19 ` Eli Zaretskii
2021-10-30 6:36 ` Eli Zaretskii
2021-10-30 12:25 ` Lars Ingebrigtsen
2021-10-30 12:30 ` Eli Zaretskii
2021-10-30 12:34 ` Lars Ingebrigtsen
2021-10-30 12:49 ` Eli Zaretskii
2021-10-30 12:20 ` Lars Ingebrigtsen
2021-10-30 6:22 ` Eli Zaretskii
2021-10-30 14:26 ` Howard Melman
2021-10-28 14:19 ` T.V Raman
2021-10-28 14:33 ` Lars Ingebrigtsen
2021-10-28 16:04 ` Eli Zaretskii
2021-11-01 19:47 ` Jonas Bernoulli
2021-11-02 2:06 ` Lars Ingebrigtsen
2021-11-03 1:27 ` Jonas Bernoulli
2021-11-03 2:07 ` Reading multiple files (was: Entering emojis) Stefan Monnier
2021-11-03 16:21 ` Jonas Bernoulli
2021-11-04 17:31 ` Entering emojis Lars Ingebrigtsen
2021-11-13 19:43 ` Problem with some new emoji in Emacs Jean Louis
2021-11-13 20:16 ` Eli Zaretskii
2021-11-13 20:49 ` Jean Louis
2021-11-14 6:35 ` Eli Zaretskii
2021-11-14 7:50 ` Jean Louis
2021-11-13 20:37 ` Stefan Monnier
2021-11-13 20:53 ` Jean Louis
2021-11-13 21:14 ` Jean Louis
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