[Webkit-unassigned] [Bug 250987] New: [GTK] Font scaling settings other than 1.00 are not rendered metrically equivalent to Firefox and Chrome, leading to broken page layouts

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=250987

            Bug ID: 250987
           Summary: [GTK] Font scaling settings other than 1.00 are not
                    rendered metrically equivalent to Firefox and Chrome,
                    leading to broken page layouts
           Product: WebKit
           Version: Other
          Hardware: PC
                OS: Linux
            Status: NEW
          Severity: Normal
          Priority: P2
         Component: WebKitGTK
          Assignee: webkit-unassigned at lists.webkit.org
          Reporter: nekohayo at gmail.com
                CC: bugs-noreply at webkitgtk.org

Created attachment 464597

  --> https://bugs.webkit.org/attachment.cgi?id=464597&action=review

Comparison at font scale 1.00 - all OK

If you take this page for example: https://www.lapresse.ca/international/europe/2023-01-22/guerre-en-ukraine-jour-333/l-allemagne-prete-a-autoriser-la-pologne-a-livrer-des-chars-leopard-a-kyiv.php

(there are various other websites affected out there, but this one is a bit more obvious, and it's easier to find other articles in that website that would trigger the issue)

...if you open the "gnome-tweaks" app, and set your font scaling to something other than the default 1.00, such as 1.15 or 1.30, you will observe that Firefox and Chrome retain the exact same font typesetting / layout rendering, while Epiphany / WebKitGTK does not.

Attached are some screenshots that compare the page mentioned above in all three browsers, with some focal points circled to draw your attention to the differences in rendering.

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