[Webkit-unassigned] [Bug 247980] WebKitGTK seems confused about size of 1px on 283 dpi display

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=247980

Michael Pujos <youp1one1 at gmail.com> changed:

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--- Comment #7 from Michael Pujos <youp1one1 at gmail.com> ---
I am observing something that I think is similar with MiniBrowser (and other WebKitGTK browsers such as Nyxt) using WebKitGTK 2.44.0 on a laptop with a 17.3" 4K panel (254 physical dpi) running on i3 Window Manager.

On that setup, I use Xft.dpi: 240 (for 2.5x font scaling) and GDK_DPI_SCALE=0.5, GDK_SCALE=2 (2x GTK UI scaling).
It works fine with all my programs except WebKitGTK resulting in huge font rendering and rendering bugs (screenshot: https://imgur.com/a/yXmBuVA), as if Xft scaling and GTK scaling were combined.

The only combination of these 3 parameters that I found render properly (without too big fonts nor UI rendering issues) is to set Xft.dpi: 96 (with GDK_DPI_SCALE=0.5, GDK_SCALE=2), except that fonts are a bit too small (at 2x scaling instead of 2.5).

IIRC, WebKitGTK before 2.44.0 did not have this issue where Xft.dpi and GDK env variables seems to be conflicting.

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