1702739 - Image not scaled correctly with website zoom

Status: RESOLVED INVALID

(Core :: Widget: Gtk, defect)

Description

[Tim Hofstede]

Attachment: Wrongly scaled images when website is zoomed in

User Agent: Mozilla/5.0 (X11; Fedora; Linux x86_64; rv:87.0) Gecko/20100101 Firefox/87.0

Steps to reproduce:

Visit https://www.faz.net/ (I'm sure there are many more examples as well) with recent Firefox build (87).

At 100% zoom, all the images look correct.
Scale to any zoom factor (e. g. 150%) and observe distorted images in the article previews at the front page.

My system:
Fedora Linux 34 Workstation (Beta)
GNOME 40 beta
GTK 4.2.0
Firefox 87.0 (64-Bit) from the repos

Affects both Wayland and X11 sessions.

I should mention that I can't observe this behavior on Kubuntu 20.04 (Plasma 5.18.5, X11, Firefox 87.0). Maybe this has something to do with GTK?

Actual results:

The images at the top of the article previews don't scale correctly. They are stretched. It seems the width increases/decreases, but not the height.

However, usually images scale correctly in Firefox. When I open the affected images on their own in a new tab, they scale correctly.

Expected results:

The said images should scale in both width and height.

Comment 1

[Tim Hofstede]

Attachment: Correct ratios

The is how the image size ratios should look like (100% zoom)

Comment 2

[BugBot [:suhaib / :marco/ :calixte]]

The Bugbug bot thinks this bug should belong to the 'Core::Widget: Gtk' component, and is moving the bug to that component. Please revert this change in case you think the bot is wrong.

Comment 3

[Emilio Cobos Álvarez [:emilio]]

Hmm, I can't repro this (also on Fedora 34, but on Nightly). Does it work with a build from https://nightly.mozilla.org? Thanks.

Comment 4

[Tim Hofstede]

Hello Emilio,

indeed it works fine on 89.0a1 (2021-04-02) (64-Bit) and even 88.0b6 (64-Bit). Thank you!

So let's just hope there won't be any regressions before the next stable version…

I guess we can close this issue for now.

Comment 5

[Emilio Cobos Álvarez [:emilio]]

There may also be a difference between the Fedora build and the Mozilla build, fwiw (in which case this should be reported to https://bugzilla.redhat.com, probably). Does a stable build from Mozilla work for you (i.e., one from here?

Comment 6

[Tim Hofstede]

Hello Emilio,

this is very strange… all the builds directly from Mozilla (stable/beta/nightly) work, even the current 87.0.

It seems to be a Fedora-specific issue?

I will report the bug to the Red Hat Bugzilla.

Comment 7

[Tim Hofstede]

See https://bugzilla.redhat.com/show_bug.cgi?id=1945984