From: Eli Zaretskii <eliz@gnu.org>
To: Tomas Hlavaty <tom@logand.com>
Cc: emacs-devel@gnu.org
Subject: Re: Introducing emacs-webkit and more thoughts on Emacs rendering (was Rethinking the design of xwidgets)
Date: Tue, 01 Dec 2020 17:58:23 +0200 [thread overview]
Message-ID: <83im9likm8.fsf@gnu.org> (raw)
In-Reply-To: <87czzu7y5r.fsf@logand.com> (message from Tomas Hlavaty on Tue, 01 Dec 2020 09:01:20 +0100)
> From: Tomas Hlavaty <tom@logand.com>
> Date: Tue, 01 Dec 2020 09:01:20 +0100
>
> It would be more convenient, if there was a way to specify elisp
> function to draw an image. By default, it could just call the existing
> C code but this would also allow me to specify a different elisp
> function which would then for example call w3mimgdisplay.
You need to be aware of how this works in Emacs. In a nutshell,
there's no function "to draw the image": we call system APIs to do
that. By the time we need to draw the image, it is already
preprocessed into a bitmap/pixmap, so we basically ask the GUI
subsystem of the OS to bitblt the image to some coordinates on the
screen which we compute.
The preprocessing of the images into bitmap/pixmap happens when the
display engine sees a 'display' property that specifies an image.
At that time we call some image library to convert the image's data
into bitmap/pixmap; then we cache the result and produce a handle to
the cache that the drawing routines will use.
So when you ask for the above, you need to fit into this scheme.
> It would be more convenient, if an image was represented as elisp data
> instead of C data.
create-image already knows how to accept image data.
> iirc there is no way to add new image types without touching C.
No, because you need to know how to convert that into the internal
format used to draw the image, which is platform dependent.
Why is it a problem to use one of the known image types? E.g., SVG
(via the svg.el library).
> Is there a way to turn off cursor for a buffer?
There's the cursor-type variable.
> Is there a way run a function after emacs changes something on the
> screen in a buffer?
That depends by what you mean by "after emacs changes something on the
screen", since in Emacs redisplay is independent/separate of data
changes. Please elaborate.
next prev parent reply other threads:[~2020-12-01 15:58 UTC|newest]
Thread overview: 210+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-10-12 20:58 Rethinking the design of xwidgets Akira Kyle
2020-10-12 22:18 ` joakim
2020-10-13 16:07 ` Akira Kyle
2020-10-13 19:06 ` joakim
2020-10-14 0:33 ` Akira Kyle
2020-10-13 13:36 ` Stefan Monnier
2020-10-13 16:09 ` Akira Kyle
2020-10-13 14:16 ` Eli Zaretskii
2020-10-13 17:05 ` Akira Kyle
2020-10-13 17:24 ` Qiantan Hong
2020-10-13 18:29 ` Akira Kyle
2020-10-13 18:44 ` Qiantan Hong
2020-10-13 19:17 ` Eli Zaretskii
2020-10-13 20:52 ` Akira Kyle
2020-10-14 14:36 ` Eli Zaretskii
2020-10-14 17:01 ` Stefan Monnier
2020-10-15 19:55 ` arthur miller
2020-10-13 18:45 ` Eli Zaretskii
2020-10-13 21:00 ` Akira Kyle
2020-10-14 14:44 ` Eli Zaretskii
2020-10-15 0:35 ` Akira Kyle
2020-10-15 2:07 ` Stefan Monnier
2020-10-15 3:35 ` arthur miller
2020-10-15 15:06 ` Eli Zaretskii
2020-10-15 15:20 ` Arthur Miller
2020-10-15 15:48 ` Eli Zaretskii
2020-10-13 17:55 ` Eli Zaretskii
2020-10-13 18:42 ` Basil L. Contovounesios
2020-10-13 19:10 ` Eli Zaretskii
2020-10-13 20:37 ` Akira Kyle
2020-10-14 14:33 ` Eli Zaretskii
2020-10-14 15:04 ` Arthur Miller
2020-10-14 15:32 ` Eli Zaretskii
2020-10-15 13:20 ` Arthur Miller
2020-10-17 4:26 ` Kai Ma
2020-10-17 4:42 ` Qiantan Hong
2020-11-14 5:40 ` Richard Stallman
2020-10-14 16:53 ` Stefan Monnier
2020-10-14 18:56 ` Aiko Kyle
2020-10-15 12:48 ` Arthur Miller
2020-10-15 16:25 ` Akira Kyle
2020-10-15 12:35 ` Arthur Miller
2020-10-16 4:02 ` Richard Stallman
2020-10-16 13:03 ` Arthur Miller
2020-10-16 18:38 ` Dmitry Gutov
2020-10-17 4:19 ` Richard Stallman
2020-10-17 4:21 ` Richard Stallman
2020-10-17 6:30 ` Arthur Miller
2020-10-17 13:35 ` Stefan Monnier
2020-10-17 19:15 ` Arthur Miller
2020-10-19 3:44 ` Richard Stallman
2020-10-18 4:17 ` Richard Stallman
2020-10-18 4:17 ` Richard Stallman
2020-10-18 9:31 ` Dmitry Gutov
2020-10-19 3:44 ` Richard Stallman
2020-10-19 12:37 ` Dmitry Gutov
2020-10-19 13:43 ` Arthur Miller
2020-10-20 5:13 ` Richard Stallman
2020-10-20 5:47 ` Arthur Miller
2020-10-20 12:58 ` Stefan Monnier
2020-10-20 13:40 ` Arthur Miller
2020-10-21 4:42 ` Richard Stallman
2020-10-21 4:46 ` Richard Stallman
2020-10-20 5:14 ` Richard Stallman
2020-10-20 5:56 ` Arthur Miller
2020-10-20 10:45 ` Dmitry Gutov
2020-10-20 13:49 ` Arthur Miller
2020-10-21 4:46 ` Richard Stallman
2020-10-19 13:34 ` Arthur Miller
2020-10-19 14:04 ` Stefan Monnier
2020-10-20 5:13 ` Richard Stallman
2020-10-18 14:41 ` Arthur Miller
2020-10-19 3:48 ` Richard Stallman
2020-10-19 13:48 ` Arthur Miller
2020-10-16 14:54 ` Dmitry Gutov
2020-10-14 18:07 ` Akira Kyle
2020-10-14 18:32 ` Eli Zaretskii
2020-10-14 19:10 ` Akira Kyle
2020-10-13 18:36 ` Tomas Hlavaty
2020-10-13 18:38 ` Tomas Hlavaty
2020-10-13 21:20 ` Aiko Kyle
2020-10-14 0:12 ` Corwin Brust
2020-10-14 19:16 ` Akira Kyle
2020-10-14 7:32 ` Tomas Hlavaty
2020-10-14 15:02 ` Eli Zaretskii
2020-10-14 16:35 ` Tomas Hlavaty
2020-10-14 19:22 ` Akira Kyle
2020-10-14 21:29 ` Tomas Hlavaty
2020-10-16 4:02 ` Richard Stallman
2020-10-16 13:09 ` Arthur Miller
2020-10-14 19:24 ` Mingde (Matthew) Zeng
2020-10-14 21:46 ` Akira Kyle
2020-10-15 5:17 ` Mingde (Matthew) Zeng
2020-10-14 4:38 ` Richard Stallman
2020-10-14 6:36 ` Akira Kyle
2020-11-22 3:35 ` Introducing emacs-webkit and more thoughts on Emacs rendering (was Rethinking the design of xwidgets) Akira Kyle
2020-11-22 12:01 ` Jean Louis
2020-11-22 12:04 ` Jean Louis
2020-11-22 12:18 ` tomas
2020-11-22 12:57 ` Jean Louis
2020-11-22 16:24 ` tomas
2020-11-22 17:18 ` Jean Louis
2020-11-22 17:48 ` tomas
2020-11-22 18:40 ` Akira Kyle
2020-11-22 19:58 ` Jean Louis
2020-11-22 20:29 ` Akira Kyle
2020-11-22 20:38 ` Jean Louis
2020-11-22 15:27 ` Arthur Miller
2020-11-22 12:50 ` Jean Louis
2020-11-22 18:33 ` Akira Kyle
2020-11-22 18:04 ` Eli Zaretskii
2020-11-22 18:46 ` Akira Kyle
2020-11-22 21:20 ` Vasilij Schneidermann
2020-11-22 22:04 ` Akira Kyle
2020-11-22 18:29 ` T.V Raman
2020-11-22 18:53 ` Akira Kyle
2020-11-22 19:35 ` T.V Raman
2020-11-22 20:26 ` Akira Kyle
2020-11-23 0:46 ` T.V Raman
2020-11-23 3:44 ` Akira Kyle
2020-11-23 3:01 ` T.V Raman
2020-11-23 3:47 ` Akira Kyle
2020-11-23 16:29 ` Jose A. Ortega Ruiz
2020-11-23 9:39 ` Lars Ingebrigtsen
2020-11-23 13:26 ` joakim
2020-11-24 6:21 ` Lars Ingebrigtsen
2020-11-23 14:59 ` Arthur Miller
2020-11-23 23:47 ` Alan Third
2020-11-24 3:58 ` Akira Kyle
2020-11-24 8:06 ` Arthur Miller
2020-11-24 5:51 ` Richard Stallman
2020-11-24 6:24 ` Lars Ingebrigtsen
2020-11-26 4:49 ` Richard Stallman
2020-11-26 5:25 ` Arthur Miller
2020-11-26 8:27 ` tomas
2020-11-26 14:55 ` Arthur Miller
2020-11-26 19:11 ` Tomas Hlavaty
2020-11-26 19:34 ` arthur miller
2020-11-27 8:04 ` Tomas Hlavaty
2020-11-27 8:44 ` Arthur Miller
2020-11-27 13:35 ` Richard Stallman
2020-11-27 19:22 ` Arthur Miller
2020-11-27 20:01 ` Eli Zaretskii
2020-11-27 21:22 ` Arthur Miller
2020-11-27 20:07 ` Stefan Monnier
2020-11-27 21:09 ` Arthur Miller
2020-11-27 21:35 ` Stefan Monnier
2020-11-27 23:23 ` Arthur Miller
2020-11-28 0:28 ` Stefan Monnier
2020-11-28 8:48 ` Arthur Miller
2020-11-27 21:22 ` Akira Kyle
2020-11-28 7:31 ` Eli Zaretskii
2020-11-28 5:55 ` Richard Stallman
2020-11-28 8:50 ` Arthur Miller
2020-11-29 5:24 ` Richard Stallman
2020-11-24 7:50 ` Arthur Miller
2020-11-24 8:47 ` tomas
2020-11-24 9:04 ` Arthur Miller
2020-11-25 5:38 ` Richard Stallman
2020-11-25 8:46 ` tomas
2020-11-25 15:26 ` Arthur Miller
2020-11-25 16:15 ` Eric S Fraga
2020-11-24 15:43 ` T.V Raman
2020-11-25 5:38 ` Richard Stallman
2020-11-25 8:54 ` tomas
2020-11-24 6:23 ` Lars Ingebrigtsen
2020-11-24 3:33 ` Akira Kyle
2020-11-24 6:27 ` Lars Ingebrigtsen
2020-11-25 1:36 ` Akira Kyle
2020-11-25 15:11 ` Eli Zaretskii
2020-11-27 20:56 ` Akira Kyle
2020-11-28 8:38 ` Eli Zaretskii
2020-11-28 8:57 ` Arthur Miller
2020-11-28 9:19 ` Eli Zaretskii
2020-11-29 0:22 ` Arthur Miller
2020-11-29 1:29 ` Akira Kyle
2020-11-29 8:22 ` martin rudalics
2020-11-29 19:01 ` Eli Zaretskii
2020-11-30 3:54 ` Akira Kyle
2020-11-30 15:39 ` Eli Zaretskii
2020-11-30 17:03 ` Akira Kyle
2020-11-30 18:11 ` Eli Zaretskii
2020-11-30 18:30 ` Akira Kyle
2020-12-01 7:44 ` Tomas Hlavaty
2020-12-03 0:24 ` Akira Kyle
2020-12-03 8:07 ` Tomas Hlavaty
2020-12-03 20:34 ` Arthur Miller
2020-12-03 20:53 ` Stefan Monnier
2020-12-01 8:01 ` Tomas Hlavaty
2020-12-01 15:36 ` Arthur Miller
2020-12-01 16:48 ` Tomas Hlavaty
2020-12-01 15:58 ` Eli Zaretskii [this message]
2020-12-01 17:33 ` Tomas Hlavaty
2020-12-01 19:41 ` Eli Zaretskii
2020-12-02 20:37 ` Tomas Hlavaty
2020-12-03 14:39 ` Eli Zaretskii
2020-12-03 21:02 ` Tomas Hlavaty
2020-12-04 7:48 ` Eli Zaretskii
2020-12-03 0:37 ` Akira Kyle
2020-12-03 8:15 ` Tomas Hlavaty
2020-12-03 15:13 ` Eli Zaretskii
2020-12-03 21:15 ` Tomas Hlavaty
2020-12-04 8:00 ` Eli Zaretskii
2020-11-30 9:05 ` martin rudalics
2020-11-30 16:10 ` Eli Zaretskii
2020-11-23 22:12 ` Alexander Adolf
2020-11-24 1:30 ` T.V Raman
2020-11-24 8:13 ` Arthur Miller
2020-11-24 3:51 ` Akira Kyle
-- strict thread matches above, loose matches on Subject: below --
2020-12-02 2:58 arthur miller
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