https://bugs.kde.org/show_bug.cgi?id=406696
Bug ID: 406696
Summary: Kwin should have sane defaults for surface format
Product: kwin
Version: 5.15.4
Platform: Neon Packages
OS: Linux
Status: REPORTED
Severity: normal
Priority: NOR
Component: wayland-generic
Assignee: kwin-bugs-n...@kde.org
Reporter: mikolabr...@ukr.net
Target Milestone: ---
Created attachment 119521
--> https://bugs.kde.org/attachment.cgi?id=119521&action=edit
Watch the sky
At the moment default color format for new wayland clients is something like
565 - 16 bit clolor. If the client does not change it, then this format will be
used for all rendering. Qt apps usually do not change it. This results for
severe color banding, especially in videos. Good example is this video when
wached in Falkon: https://www.youtube.com/watch?v=Bey4XXJAqS8 At the same time
Firefox running in Xwayland has no color banding.
STEPS TO REPRODUCE
1. Open https://www.youtube.com/watch?v=Bey4XXJAqS8 in Falkon runing as native
Wayland client
2. Open same video in Firefox runing as X11 client
3. Compare color banding on frames with big gradients
OBSERVED RESULT
Falkon has severe color banding
EXPECTED RESULT
Videos look the same in bouth browsers
SOFTWARE/OS VERSIONS
Linux/KDE Plasma: Neon Dev stable
(available in About System)
KDE Plasma Version: 5.15.4
KDE Frameworks Version: 5.58.0
Qt Version: 5.12.0
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