Bug 408125

Summary: Implement cross-fading in a shader
Product: [Plasma] kwin Reporter: retired <pepko94>
Component: compositingAssignee: KWin default assignee <kwin-bugs-null>
Status: RESOLVED FIXED    
Severity: minor CC: kde, nate, plasma-bugs
Priority: NOR    
Version First Reported In: 5.15.90   
Target Milestone: ---   
Platform: Arch Linux   
OS: Linux   
Latest Commit: Version Fixed In:
Sentry Crash Report:
Attachments: demo

Description retired 2019-05-30 17:35:00 UTC
Created attachment 120413 [details]
demo

SUMMARY

It seems that background of panel mouseover tooltips flickers white when appearing. My theory is that blur is not applied early enough because it doesn't happen when compositing is disabled with Alt+Shift+F12.

STEPS TO REPRODUCE

Demonstration in attachment. First frames flicker white.


OBSERVED RESULT

White flicker

EXPECTED RESULT

Correct color/blur should be applied immediately.



ADDITIONAL INFORMATION

Operating System: Arch Linux 
KDE Plasma Version: 5.15.90
KDE Frameworks Version: 5.58.0
Qt Version: 5.13.0
Kernel Version: 5.1.5-zen1-2-zen
OS Type: 64-bit
Processors: 4 × Intel® Core™ i7-3720QM CPU @ 2.60GHz
Memory: 15,5 GiB


Doesn't happen with dark breeze, or it's not as pronounced because of colors used.
Comment 1 Nate Graham 2019-11-14 03:44:35 UTC
Can you still reproduce the issue in Plasma 5.17?
Comment 2 retired 2019-11-14 09:10:40 UTC
Yeh, still can.
I'd like to note that it's way more pronounced in real life than on video.
Comment 3 Nate Graham 2019-11-14 14:31:16 UTC
Thanks for the info. I cannot reproduce, FWIW.
Comment 4 Nate Graham 2019-12-12 17:38:52 UTC
Not likely to be an issue with the Breeze theme itself. Can you reproduce this with Breeze Dark or when using a different Plasma theme?
Comment 5 retired 2019-12-13 20:08:37 UTC
As of now which is 5.17.4 it's still there.

Affected themes:
-Psion
-Breeze
-Breeze Dark
-Oxyglass

Unaffected themes:
-Oxygen
Comment 6 Nate Graham 2019-12-13 20:11:15 UTC
Moving to KWin since it affects multiple themes and looks like it could be a graphical or compositing glitch.
Comment 7 David Edmundson 2023-05-11 08:59:00 UTC
Cross fade has been rewritten since the time of this bug report