Bug#1092943: loupe: Images with transparent backgrounds displayed in an unusable way

[Matthias Geiger]

Control: tags -1 upstream

On Mon, 13 Jan 2025 17:34, Richard <rrosner5 at gmail.com> wrote:
>Package: loupe
>Version: 47.2-2
>Severity: normal
>
>Dear Maintainer,
>
>loupe has a serious issue, making it virtually unusable with most if not all images containing a transparent background, as it relies on a broken algorithm to automatically adapt what color loupe shows behind the image [1]. Making matters even worse, not using the dark theme in Gnome will still cause this issue, as the author of loupe decided to adhere to the HIG recommendation to always 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, affecting all users of Gnome that haven't manually installed an alternative image viewer and made it the default. The issue is also still present in v48.alpha from the gnome-nightly flatpak remote.
>
>[1]: https://gitlab.gnome.org/GNOME/loupe/-/issues/139
>https://developer.gnome.org/hig/guidelines/ui-styling.html#light-and-dark-ui-styles
>
Hi Richard,

thanks for this bugreport.

However, since this is an upstream issue all we can do is waiting for 
upstream to fix this. I agree that this an annoying bug though.

best,

werdahias