Bug 402862 - Window thumbnails don't have good integration with Qt Quick
Summary: Window thumbnails don't have good integration with Qt Quick
Status: RESOLVED FIXED
Alias: None
Product: kwin
Classification: Plasma
Component: general (show other bugs)
Version: git master
Platform: Other Linux
: NOR normal
Target Milestone: ---
Assignee: KWin default assignee
URL:
Keywords:
Depends on:
Blocks:
 
Reported: 2019-01-04 15:38 UTC by Vlad Zahorodnii
Modified: 2022-05-24 07:54 UTC (History)
0 users

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Screenshot (610.71 KB, image/png)
2019-01-04 15:38 UTC, Vlad Zahorodnii 		Details
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Description Vlad Zahorodnii 2019-01-04 15:38:30 UTC 
Created attachment 117282 [details]
Screenshot

SUMMARY
Each WindowThumbnailItem is painted above its corresponding window (with compositing being on), see Scene::paintWindow.

Because of that, we're not able to use effects provided by Qt Quick or just paint a badge above a thumbnail to mark it as selected.

In addition to that, painting window thumbnails directly onto the screen causes visual artifacts when using effects like the Sliding Popups, see the attached screenshot.

SOFTWARE/OS VERSIONS
KDE Plasma Version: 5.14.80
KDE Frameworks Version: 5.53
Qt Version: 5.12
Comment 1 Martin Flöser 2019-01-04 16:32:20 UTC 
The main reason for this is that on X11 KWin and Qt could not share the OpenGL context. On Wayland we could get KWin's texture into QtQuick, but it would mean that we need different code paths.