SUMMARY While using latest Qt 6.8 + frameworks + plasma from master icons in Qt apps and some icons in plasma are blurred as long as I have fractional scaling enabled. STEPS TO REPRODUCE 1. Enable fractional scaling 2. open kwrite or 2. open a plasma popup OBSERVED RESULT Icons are blurry EXPECTED RESULT Icons should be sharp. SOFTWARE/OS VERSIONS Linux/KDE Plasma: Arch, updated regularly. KDE Plasma Version: Master, compiled KDE Frameworks Version: Master, compiled Qt Version: 6.8 from qt5.git branch ADDITIONAL INFORMATION I can patch and recompile if more information is needed.
Created attachment 172590 [details] Video where the blurry icons can be observed. Scaled down to 1080 from 4k but the icon blurriness can be observed.
I can't reproduce that with current git master for everything KDE, but Qt 6.7.2. At 100% or 150% scale on a 1080p screen, or 225% or 200% scale on a 4k screen, the icons don't exhibit the level of blurriness I can see in your screen recording.
Aha, apparently this is known and will be fixed with https://invent.kde.org/frameworks/kiconthemes/-/merge_requests/146.
Awesome, I can confirm that the patch fixes the issue for me.
*** Bug 491094 has been marked as a duplicate of this bug. ***
Git commit 89bbd78273f96a858ea181c977dda50f223cc4c4 by Nicolas Fella. Committed on 14/08/2024 at 14:08. Pushed by nicolasfella into branch 'master'. [kiconengine] Adapt to Qt behavior change in scaledPixmap Since Qt 6.8 the size we get doesn't include the scale, so apply that outselves M +7 -1 src/kiconengine.cpp https://invent.kde.org/frameworks/kiconthemes/-/commit/89bbd78273f96a858ea181c977dda50f223cc4c4