Bug 470607

Summary:	When using Wobbly Windows on Plasma 6 Wayland with 200% scale, windows blur/de-scale when dragged
Product:	[Plasma] kwin	Reporter:	Nate Graham <nate>
Component:	effects-various	Assignee:	KWin default assignee <kwin-bugs-null>
Status:	RESOLVED FIXED
Severity:	minor	Keywords:	qt6, regression, wayland-only
Priority:	NOR
Version First Reported In:	master
Target Milestone:	---
Platform:	Other
OS:	Linux
Latest Commit:	https://invent.kde.org/plasma/kwin/-/commit/b9da04bf455a421e3abd32432d96835c86cc4ba2	Version Fixed/Implemented In:
Sentry Crash Report:

Description Nate Graham 2023-06-03 20:23:12 UTC

STEPS TO REPRODUCE
1. Use Plasma 6 Wayland session
2. Turn on scaling; I use 200%
3. Turn on Wobbly Windows effect
4. Drag a window, or even just click and hold and don't move it anywhere

OBSERVED RESULT
The window contents stop being rendered at 200% scale while dragged; instead it visibly blurs or pixelates

EXPECTED RESULT
Window contents remain drawn at high DPI while being dragged

ADDITIONAL INFORMATION
- Did not happen in the Plasma 6 Wayland session
- Does not happen in the Plasma 6 X11 session

Comment 1 Vlad Zahorodnii 2023-06-12 16:33:08 UTC

Git commit b9da04bf455a421e3abd32432d96835c86cc4ba2 by Vlad Zahorodnii.
Committed on 12/06/2023 at 16:09.
Pushed by vladz into branch 'master'.

libkwineffects: Make OffscreenEffect render window with its output's scale

Render the window at its output's scale to make the window less blurry.

M  +5    -6    src/libkwineffects/kwinoffscreeneffect.cpp

https://invent.kde.org/plasma/kwin/-/commit/b9da04bf455a421e3abd32432d96835c86cc4ba2