GNU bug report logs - #58373
Support image-type `jpg'

Previous Next

To add a comment to this bug, you must first unarchive it, by sending
a message to control AT debbugs.gnu.org, with unarchive 58373 in the body.
You can then email your comments to 58373 AT debbugs.gnu.org in the normal way.

Toggle the display of automated, internal messages from the tracker.

Message #5 received at submit <at> debbugs.gnu.org (full text, mbox):

From: Thuna <thuna.cing <at> gmail.com>
To: bug-gnu-emacs <at> gnu.org
Subject: Support image-type `jpg'
Date: Sat, 08 Oct 2022 03:43:14 +0200

Currently, `jpg' is not in image-types, despite `jpeg' being in it.
Similarly, image descriptors of the form `(image :type jpg...)' do not
display properly, while those of the form `(image :type jpeg...)' do.

Changing the type from jpg to jpeg (for a jpg image) does display the
image, so it's not like Emacs is incapable of doing it; I imagine this
should be a trivial fix.

Message #8 received at 58373 <at> debbugs.gnu.org (full text, mbox):

From: Stefan Kangas <stefankangas <at> gmail.com>
To: Thuna <thuna.cing <at> gmail.com>, 58373 <at> debbugs.gnu.org
Subject: Re: bug#58373: Support image-type `jpg'
Date: Sat, 8 Oct 2022 12:36:52 +0200

Thuna <thuna.cing <at> gmail.com> writes:

> Currently, `jpg' is not in image-types, despite `jpeg' being in it.
> Similarly, image descriptors of the form `(image :type jpg...)' do not
> display properly, while those of the form `(image :type jpeg...)' do.

The image type is really "JPEG" (and the MIME type "image/jpeg"), while
".jpg" just happens to be a commonly used file extension for that file
format.  So what we have now is already correct, strictly speaking.

All the same, perhaps it would be convenient to allow "jpg" as an alias
for "jpeg".  Would that risk introducing some backwards-incompatibility
with some package out there though?

Message #11 received at 58373 <at> debbugs.gnu.org (full text, mbox):

From: Lars Ingebrigtsen <larsi <at> gnus.org>
To: Stefan Kangas <stefankangas <at> gmail.com>
Cc: 58373 <at> debbugs.gnu.org, Thuna <thuna.cing <at> gmail.com>
Subject: Re: bug#58373: Support image-type `jpg'
Date: Sat, 08 Oct 2022 15:16:29 +0200

Stefan Kangas <stefankangas <at> gmail.com> writes:

> The image type is really "JPEG" (and the MIME type "image/jpeg"), while
> ".jpg" just happens to be a commonly used file extension for that file
> format.  So what we have now is already correct, strictly speaking.
>
> All the same, perhaps it would be convenient to allow "jpg" as an alias
> for "jpeg".  Would that risk introducing some backwards-incompatibility
> with some package out there though?

It probably won't, but I don't think it would be a good idea to
introduce an alias here.  It's less confusing to just have a simple
single mapping from type to backend.

So I don't think we should do anything here, and I'm therefore closing
this bug report.

Previous Next

GNU bug tracking system
Copyright (C) 1999 Darren O. Benham, 1997,2003 nCipher Corporation Ltd, 1994-97 Ian Jackson.