Bug 487714

Summary:	Synchronize more font settings to gtk
Product:	[Applications] systemsettings	Reporter:	Ilya Fedin <fedin-ilja2010>
Component:	kcm_style	Assignee:	Plasma Bugs List <plasma-bugs>
Status:	CONFIRMED ---
Severity:	wishlist	CC:	4wy78uwh, bjorn.bidar, g311571057, kdedev, mail, nate, sam, site.kde
Priority:	NOR
Version First Reported In:	unspecified
Target Milestone:	---
Platform:	Other
OS:	Linux
Latest Commit:		Version Fixed In:
Sentry Crash Report:

Description Ilya Fedin 2024-05-28 21:37:04 UTC

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SUMMARY
I checked gtk settings on my machine and found that kde-gtk-config seem to not to sync anything except of gtk-font-name. But there's more to sync (description / settings.ini key / gsettings key / xsettings key):

Antialiasing (0 / 1): gtk-xft-antialias / org.gnome.desktop.interface.font-antialiasing (none / grayscale / rgba) / Xft/Antialias
Hinting (0 / 1): gtk-xft-hinting / <none> / Xft/Hinting
Hint style (hintnone / hintslight / hintmedium / hintfull): gtk-xft-hintstyle / org.gnome.desktop.interface.font-hinting / Xft/HintStyle
RGB subpixel order (rgba (none) / rgb / bgr / vrgb / vbgr): gtk-xft-rgba / org.gnome.desktop.interface.font-rgba-order / Xft/RGBA
Monospace font: <none> / org.gnome.desktop.interface.monospace-font-name / <none>
Document font (KDE doesn't seem to have this, perhaps set the general one?): <none> / org.gnome.desktop.interface.document-font-name / <none>

STEPS TO REPRODUCE
1. Check settings.ini / org.gnome.desktop.interface section in dconf-editor / dump_xsettings

OBSERVED RESULT
Font settings to be set

EXPECTED RESULT
Font settings aren't set except of gtk-font-name (general font)

SOFTWARE/OS VERSIONS
Operating System: NixOS 24.11
KDE Plasma Version: 6.0.5
KDE Frameworks Version: 6.2.0
Qt Version: 6.7.1
Kernel Version: 6.9.1-zen1 (64-bit)
Graphics Platform: Wayland
Processors: 8 × AMD Ryzen 5 3500U with Radeon Vega Mobile Gfx
Memory: 5.7 ГиБ of RAM
Graphics Processor: AMD Radeon Vega 8 Graphics

Comment 1 Nate Graham 2024-06-10 23:33:34 UTC

Good idea, wanna submit a patch?

Comment 2 Ilya Fedin 2024-06-27 06:02:21 UTC

No, unlikely I will do that... 😅

Comment 3 Ilya Fedin 2024-09-30 23:09:04 UTC

Since gtk 4.16, one has to set a new setting to 'manual' for other font rendering settings to work: gtk-font-rendering / org.gnome.desktop.interface.font-rendering / <none>

https://gitlab.gnome.org/GNOME/gtk/-/merge_requests/7113

The MR also mentions a settings.ini-only gtk-hint-font-metrics setting (which is not new) that control subpixel positioning of text

Comment 4 Björn Bidar (Thaodan) 2025-03-28 05:03:30 UTC

Related to this I found that the font settings don't forward the monospace font setting through to GTK.
I tried to set my fonts in Emacs through gsettings so they can use the KDE settings. gsettings doesn't match with the KDE settings.

Comment 5 Reilly Brogan 2025-09-04 20:28:09 UTC

Plasma 6.5 will support setting monospace-font-name and document-font-name. I didn't implement any of the other settings since I didn't understand them well enough to feel confident messing with them.

Comment 6 Ilya Fedin 2025-09-04 22:05:16 UTC

That's quite sad... Antialiasing/hint settings are the most important as you see the result of them in any GTK application. While for monospace or document font you would need a gnome terminal/editor/etc which I guess isn't used by much users.

Comment 7 Reilly Brogan 2025-09-19 02:38:25 UTC

(In reply to Ilya Fedin from comment #6)
> That's quite sad... Antialiasing/hint settings are the most important as you
> see the result of them in any GTK application. While for monospace or
> document font you would need a gnome terminal/editor/etc which I guess isn't
> used by much users.

I think there are a decent number of people who prefer ptyxis or ghostty over konsole, so this will benefit them. I also prefer meld over any of the Qt diff visualizers and that uses monospace-font.

Really I was surprised at how easy it was to add support for those to kde-gtk-config. The code infra is already in place to update the gtk settings files and gsettings, so if you know how these settings _should_ be mapped you can go ahead and do it yourself easily enough.