https://bugs.kde.org/show_bug.cgi?id=454213
Bug ID: 454213
Summary: An animation duration >0s for window buttons causes
stuttering
Product: kwin
Version: 5.24.5
Platform: Other
OS: Linux
Status: REPORTED
Severity: normal
Priority: NOR
Component: aurorae
Assignee: kwin-bugs-n...@kde.org
Reporter: doncb...@gmail.com
Target Milestone: ---
SUMMARY
I noticed that there are not many themes that use an animation for Aurorae
window buttons. Everyone appears to use Animation=0 in their theme's rc file. I
have observed that when a button whose hovered state is similar to its normal
state animates, the animation briefly shows transparency, causing the icon to
look as though it flickered instead of smoothly transitioned.
STEPS TO REPRODUCE
1. Select an Aurorae theme (I used Willow Dark for best visibility)
2. Change the rc file so animation can occur (I set it to 200) and reapply the
theme
3. On the focused window, hover over the buttons (e.g. maximize/restore)
OBSERVED RESULT
Animating the icon from the icon to the icon with a light background causes a
brief stutter
EXPECTED RESULT
Animation smoothly transitions without "blinking"
SOFTWARE/OS VERSIONS
Operating System: Arch Linux
KDE Plasma Version: 5.24.5
KDE Frameworks Version: 5.94.0
Qt Version: 5.15.4
Kernel Version: 5.17.9-arch1-1 (64-bit)
Graphics Platform: X11
ADDITIONAL INFORMATION
I believe it is less noticeable with the inactive window because of the great
different between the normal lightness and hovered lightness, making the blink
less noticeable. Fixing this may require changing the algorithm for the fade or
giving the option to change the animation style.
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