Bug 222883 – with bwrap fonts are not antialiased on wayland native (i.e. /etc/fonts not considered)

• Component: Layout and Rendering
• Status: RESOLVED DUPLICATE

[Hannes Müller]

Created attachment 422524 [details]
effect of bug in evolution

I observe with native wayland the font settings in /etc/fonts are not considered, i.e. fonts are not antialised in the evolution email body handled by webkit, ref. attached picture. Evolution in debian 11 is using libwebkit2gtk-4.0-37 (2.30.5-1) with bwrap.

Font antialiazing in fact is correct in the following cases:
- with X11 (instead of wayland) OR
- bwrap is disabled (i.e. WEBKIT_FORCE_SANDBOX=0 evolution) OR
- wayland running in virtual machine (for my case VMWare Player 12 on Windows 10) OR
- /etc/fonts is overrided by ~/.config/fontconfig/fonts.conf

This bug is not specific to debian. It has been also observed e.g. on arch linux:
- https://bbs.archlinux.org/viewtopic.php?id=262384
- https://gitlab.gnome.org/GNOME/evolution/-/issues/1161

The bug is still present in debian experimental with libwebkit2gtk-4.0-37 (2.31.90-1).

My ~/.config/fontconfig/fonts.conf as a workaround to work on wayland with sandboxing:
<?xml version='1.0'?>
<!DOCTYPE fontconfig SYSTEM 'fonts.dtd'>
<fontconfig>
	<match target="font">
		<edit mode="assign" name="antialias"><bool>true</bool></edit>
		<edit mode="assign" name="embeddedbitmap"><bool>false</bool></edit>
		<edit mode="assign" name="hinting"><bool>true</bool></edit>
		<edit mode="assign" name="hintstyle"><const>hintslight</const></edit>
		<edit mode="assign" name="lcdfilter"><const>lcddefault</const></edit>
		<edit mode="assign" name="rgba"><const>rgb</const></edit>
	</match>
</fontconfig>

[Radar WebKit Bug Importer]

<rdar://problem/75404420>

[Hannes Müller]

After further investiation I found out this is a duplication of:
https://bugs.webkit.org/show_bug.cgi?id=213148

So adding a dependency to xdg-desktop-portal-gtk resolved the problem also for debian 11.

*** This bug has been marked as a duplicate of bug 213148 ***