From: lg.zevlg@gmail.com
To: Eli Zaretskii <eliz@gnu.org>
Cc: 34873@debbugs.gnu.org
Subject: bug#34873: 27.0.50; Creating unibyte string in emacs modules
Date: Sat, 16 Mar 2019 16:28:05 +0100 [thread overview]
Message-ID: <07AE3DD5-8AEB-4A7C-B4D3-B20D1593E8DF@gmail.com> (raw)
In-Reply-To: <831s37ypra.fsf@gnu.org>
16 марта 2019 г., в 13:20, Eli Zaretskii <eliz@gnu.org> написал(а):
>> From: lg.zevlg@gmail.com
>> Date: Sat, 16 Mar 2019 11:32:47 +0100
>> Cc: 34873@debbugs.gnu.org
>>
>> Please explain why you need to create a unibyte string for that. I
>> guess what's missing is more details regarding what you are trying to
>> do (the single sentence above about :data wasn't enough for me), and
>> how is your module involved in that, in particular why do you need a
>> module to display an image in Emacs.
>>
>> See this thread https://lists.gnu.org/archive/html/emacs-devel/2019-03/msg00465.html
>
> I've read that (I read everything on emacs-devel). It still doesn't
> tell me enough to answer my questions, unfortunately.
Ok, emacs-ffi is emacs module that implements FFI to shared libraries. wand-mode is package that implements ffi bindings (using emacs-ffi module) to libMagickWand and on top of them powerful image editor is written
wand-mode does many trickery on images in very fast fasion, and it needs method to display previews/results in Emacs buffer. Result of image manipulation is raw rgb(a) data that seats in user-ptr available from imagemagick without any copying. I want `create-image’ with :format ‘image/x-rgb to accept this user-ptr as data to make image creation fast
Method proposed by Stefan with make_string/encode-coding-string works, but its speed is far from being usable on big images. There is no method just to use data as-is to make things fast
—
lg
next prev parent reply other threads:[~2019-03-16 15:28 UTC|newest]
Thread overview: 21+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-03-15 20:52 bug#34873: 27.0.50; Creating unibyte string in emacs modules Evgeny Zajcev
2019-03-16 7:30 ` Eli Zaretskii
2019-03-16 10:32 ` lg.zevlg
2019-03-16 12:20 ` Eli Zaretskii
2019-03-16 15:28 ` lg.zevlg [this message]
2019-03-16 16:17 ` Eli Zaretskii
2019-05-07 16:55 ` Basil L. Contovounesios
2019-05-07 18:33 ` Eli Zaretskii
2019-05-07 19:24 ` Basil L. Contovounesios
2019-05-07 19:48 ` Eli Zaretskii
2020-08-26 10:43 ` Lars Ingebrigtsen
2020-08-26 10:52 ` Eli Zaretskii
2020-08-27 13:04 ` Lars Ingebrigtsen
2020-08-27 13:40 ` Eli Zaretskii
2020-08-27 14:33 ` Noam Postavsky
2020-08-27 16:57 ` Eli Zaretskii
2020-08-27 17:13 ` Noam Postavsky
2020-08-27 17:18 ` Eli Zaretskii
2020-10-13 4:52 ` Lars Ingebrigtsen
2020-10-13 14:31 ` Philipp Stephani
2020-10-14 3:59 ` Lars Ingebrigtsen
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