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From: Eli Zaretskii <eliz@gnu.org>
To: tomas@tuxteam.de
Cc: emacs-devel@gnu.org
Subject: Re: Emacs canvas support
Date: Wed, 29 Apr 2020 20:38:07 +0300	[thread overview]
Message-ID: <83h7x2xke8.fsf@gnu.org> (raw)
In-Reply-To: <83imhixkva.fsf@gnu.org> (message from Eli Zaretskii on Wed, 29 Apr 2020 20:27:53 +0300)

> Date: Wed, 29 Apr 2020 20:27:53 +0300
> From: Eli Zaretskii <eliz@gnu.org>
> Cc: emacs-devel@gnu.org
> 
> That's not how Emacs controls what's on display.  It basically
> represents each window as a 2D array of glyphs, each one of which has
> a certain graphical representation.  The representation itself is of
> no concern to the display engine (well, almost); the only thing it
> cares about is the metrics of each glyph, because that's what it needs
> to do layout calculations.

Oh, and one more important aspect: everything that winds up on display
must come from some buffer or some Lisp string.  It could be a special
text property or somesuch, but it must be found by walking some buffer
or some known-in-advance Lisp string, because that's what top-level
display functions do: they iterate over these objects, and produce the
glyphs based on what they find there.



  reply	other threads:[~2020-04-29 17:38 UTC|newest]

Thread overview: 53+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
     [not found] <875zdikdge.fsf.ref@yahoo.com>
2020-04-29  6:34 ` Emacs canvas support Po Lu via Emacs development discussions.
2020-04-29  8:24   ` Eli Zaretskii
2020-04-29  9:57     ` Po Lu
2020-04-29 10:10       ` Eli Zaretskii
2020-04-29 10:22         ` Po Lu
2020-04-29 10:27           ` Po Lu via Emacs development discussions.
2020-04-29 11:47             ` Eli Zaretskii
2020-04-29 10:35           ` Eli Zaretskii
2020-04-29 10:41             ` Po Lu
2020-04-29 11:51               ` Eli Zaretskii
2020-04-29 12:12                 ` Po Lu
2020-04-29 16:14               ` David Engster
2020-04-29 16:54                 ` Eli Zaretskii
2020-04-29 17:16                   ` tomas
2020-04-29 17:27                     ` Eli Zaretskii
2020-04-29 17:38                       ` Eli Zaretskii [this message]
2020-04-30 13:11                         ` Arthur Miller
2020-04-30 14:18                           ` Eli Zaretskii
2020-04-30 14:58                             ` Arthur Miller
2020-04-30 17:30                               ` Eli Zaretskii
2020-05-01 14:32                                 ` Arthur Miller
2020-04-29 18:51                       ` tomas
2020-04-29 19:03                         ` Eli Zaretskii
2020-04-29 19:08                           ` tomas
2020-04-29 19:25                             ` Eli Zaretskii
2020-04-29 19:59                               ` tomas
2020-04-30  1:19                                 ` Stefan Monnier
2020-04-30  6:55                                   ` tomas
2020-04-30 12:03                                     ` Stefan Monnier
2020-04-30 12:50                                       ` tomas
2020-04-30  8:04                                   ` Po Lu
2020-04-30 12:08                                     ` Stefan Monnier
2020-04-30 13:55                                     ` Eli Zaretskii
2020-05-01 23:27                                       ` Po Lu
2020-05-02  6:51                                         ` Eli Zaretskii
2020-04-30 13:46                                   ` Eli Zaretskii
2020-04-30 14:37                                     ` Stefan Monnier
2020-04-30 17:27                                       ` Eli Zaretskii
2020-04-30 18:22                                         ` Stefan Monnier
2020-04-30 18:42                                           ` Eli Zaretskii
2020-04-30 14:27                                   ` Drew Adams
2020-04-30 13:33                                 ` Eli Zaretskii
2020-04-30 13:52                                   ` Arthur Miller
2020-04-29 19:23                   ` David Engster
2020-04-30 13:29                     ` Eli Zaretskii
2020-04-30  6:52                   ` Corwin Brust
2020-04-29 17:08                 ` Eli Zaretskii
2020-04-29 20:14                   ` David Engster
2020-04-30 13:35                     ` Eli Zaretskii
2020-04-29 20:48   ` Juri Linkov
2020-04-30  2:36     ` Eli Zaretskii
2020-04-30 20:20       ` Juri Linkov
2020-05-01  6:01         ` Eli Zaretskii

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