https://bugs.kde.org/show_bug.cgi?id=502206
Bug ID: 502206
Summary: Parses fontconfig settings differently depending on
whether there is one match statement or many
Classification: Applications
Product: systemsettings
Version: 5.27.10
Platform: SteamOS
OS: Linux
Status: REPORTED
Severity: normal
Priority: NOR
Component: general
Assignee: plasma-b...@kde.org
Reporter: sunsp...@gmail.com
Target Milestone: ---
SUMMARY
The default when setting font settings from the system settings app will
generate a .fonts.conf file with many MATCH tags for each condition. Since all
of them are assigned to match target=font I thought I would clean up the file a
bit and get rid of all the match tags except for one to make it easier to
read/edit. What I have noticed is that the system does NOT like that. I was
noticing colour-fringing in right-click menus and buttons, etc. that should
have been greyscale.
STEPS TO REPRODUCE
1. Have a .fonts.conf file with many match tags (default) and one with only 1
match tag and all the conditions in it.
OBSERVED RESULT
With many match tags it will produce more or less the expected output. With one
match tag it starts ignoring things and using subpixel with no lcd filter, etc.
when the file is set to use greyscale. Basically it expects to receive only 1
condition so an assignment has to be done over and over.
EXPECTED RESULT
Output should look the same, whether it is many match tags in .fonts.conf or a
single tag.
SOFTWARE/OS VERSIONS
Operating System: SteamOS 3.6.22 Build: 20250224.1
KDE Plasma Version: 5.27.10
KDE Frameworks Version: 5.115.0
Qt Version: 5.15.12
ADDITIONAL INFORMATION
To give an example of the formatting I am talking about, shouldn't the system
interpret both of these layouts exactly the same because "font" is the same
target?
<match target="font">
<edit name="lcdfilter" mode="assign">
<const>lcdnone</const>
</edit>
</match>
<match target="font">
<edit name="rgba" mode="assign">
<const>none</const>
</edit>
</match>
vs
<match target="font">
<edit name="lcdfilter" mode="assign">
<const>lcdnone</const>
</edit>
<edit name="rgba" mode="assign">
<const>none</const>
</edit>
</match>
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