From: Alan Third <alan@idiocy.org>
To: Lars Ingebrigtsen <larsi@gnus.org>
Cc: ynyaaa@gmail.com, 46556@debbugs.gnu.org
Subject: bug#46556: 27.1; transparent images are displayed incorrectly if rotated
Date: Tue, 16 Feb 2021 21:24:24 +0000 [thread overview]
Message-ID: <YCw4CDa4LfXtgwx/@breton.holly.idiocy.org> (raw)
In-Reply-To: <87sg5ww430.fsf@gnus.org>
On Tue, Feb 16, 2021 at 02:10:43PM +0100, Lars Ingebrigtsen wrote:
> ynyaaa@gmail.com writes:
>
> > The form below displays same images with different rotation, different
> > format.
>
> In Emacs 28, I get the following with the test case:
>
>
> This is on Debian bullseye.
>
> In Emacs 27, I get something very different:
>
>
> Which looks all kinds of wrong, so this has changed quite a bit since
> Emacs 27.
The only difference between the two is that on X with Emacs 28 we use
nearest neighbour filtering on image scale up instead of some
smoothing algorithm.
> Would it be possible for you to test with Emacs 28 and see whether the
> problem you report (on Windows) is still present there?
It does sound like something must be going wrong on Windows.
Unfortunately I don't know what that could be because, as I said on
the other bug report, NS and Windows use the same rotation logic, and
NS is fine, so it must be when it comes to actually drawing that the
problem manifests.
--
Alan Third
next prev parent reply other threads:[~2021-02-16 21:24 UTC|newest]
Thread overview: 10+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-02-16 10:17 bug#46556: 27.1; transparent images are displayed incorrectly if rotated ynyaaa
2021-02-16 13:10 ` Lars Ingebrigtsen
2021-02-16 21:24 ` Alan Third [this message]
2021-02-17 17:05 ` Eli Zaretskii
2021-02-17 19:26 ` Alan Third
2021-02-17 19:57 ` bug#46554: 27.1; 180 degree rotated image is displayed in slightly different position Eli Zaretskii
2021-02-17 19:59 ` bug#46556: 27.1; transparent images are displayed incorrectly if rotated Eli Zaretskii
2021-02-17 20:07 ` Alan Third
2021-02-17 20:26 ` Eli Zaretskii
2021-02-17 21:08 ` Alan Third
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
List information: https://www.gnu.org/software/emacs/
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=YCw4CDa4LfXtgwx/@breton.holly.idiocy.org \
--to=alan@idiocy.org \
--cc=46556@debbugs.gnu.org \
--cc=larsi@gnus.org \
--cc=ynyaaa@gmail.com \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
Code repositories for project(s) associated with this public inbox
https://git.savannah.gnu.org/cgit/emacs.git
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for read-only IMAP folder(s) and NNTP newsgroup(s).