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From: tomas@tuxteam.de
To: Stefan Monnier <monnier@iro.umontreal.ca>
Cc: Eli Zaretskii <eliz@gnu.org>, emacs-devel@gnu.org
Subject: Re: Emacs canvas support
Date: Thu, 30 Apr 2020 08:55:58 +0200	[thread overview]
Message-ID: <20200430065558.GA21455@tuxteam.de> (raw)
In-Reply-To: <jwvftcl6adj.fsf-monnier+emacs@gnu.org>

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On Wed, Apr 29, 2020 at 09:19:51PM -0400, Stefan Monnier wrote:
> > Now imagine there's a (graphical) line going from (text) display
> > line 3 to 7. You are not implying that we have to segment that
> > into four chunks, one per text line?
> 
> I think it would make more sense to treat the overlaid canvas as
> a completely separate pixmap: when we get an request to redraw
> a particular area of the screen, we'd ask the current redisplay code to
> redraw the corresponding text content and then we'd ask the canvas code
> to draw on top of it.  So for rendering of the canvas code we don't need
> to know which part of the canvas cover which characters, we just render
> the glyph matrix into a pixmap, render the canvas into another pixmap
> and then combine them onto the screen.

This is sounding more and more like a compositor :-)

Nit: perhaps we'd like to have pics below as well as above text.

Cheers
-- t

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  reply	other threads:[~2020-04-30  6:55 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
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 [this message]
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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