Bug#1089221: gnome-core: Restore dependency on eog and make it default for formats allowing for transparency

[Richard]

Package: gnome-core
Version: 1:47+4
Severity: wishlist
X-Debbugs-Cc: rrosner5 at gmail.com

Dear Maintainer,

with Gnome 45, eog was replaced as the default image viewer by loupe, and thus dropped as dependency. The problem with that is, that loupe has a serious issue, making it virtually unusable with most if not all images containing a transparent background, and it doesn't look like it's going to be fixed in time for the Debian 13 release [1]. Furthermore, it affects all users of Gnome, as the author of loupe decided to adhere to the HIG recommendation to default to a dark background for apps displaying rich content [2]. Without "gsettings set org.gnome.desktop.interface color-scheme prefer-light" it's impossible to work around the issue by just not selecting the dark theme in system settings. Thus, this still open issue would potentially be a big step back in user experience in that area, which is why I propose to not make loupe the default, at least not for formats potentially containing transparencies, for the Debian 13 release, and restore the dependency on eog for the time 
being. If the issue is fixed in time for Debian 14, loupe can be made the default for all formats it supports at that point in time.

[1]: https://gitlab.gnome.org/GNOME/loupe/-/issues/139
[2]: https://developer.gnome.org/hig/guidelines/ui-styling.html#light-and-dark-
ui-styles