Bug 472707

Summary:	Fractional scaling under gwenview / wayland not correct
Product:	[Applications] gwenview	Reporter:	pixelplanetdev <pixelplanetdev>
Component:	general	Assignee:	Gwenview Bugs <gwenview-bugs-null>
Status:	RESOLVED FIXED
Severity:	normal
Priority:	NOR
Version First Reported In:	23.04.3
Target Milestone:	---
Platform:	Fedora RPMs
OS:	Linux
Latest Commit:		Version Fixed/Implemented In:
Sentry Crash Report:
Attachments:	screenshot of gwenview displaying a screenshot

Description pixelplanetdev 2023-07-27 17:52:55 UTC

SUMMARY

Even thought that i set global scaling to 150%, i expect a 4k image, displayed on a 4k screen, to be as large as the screen when it's at 100% zoom within gwenview.
I don't expect the image to be up- or downscaled.

This is not the case in gwenview.

STEPS TO REPRODUCE
1. use wayland on a 4k monitor
2. set scale to 150% (in screen settings)
2.  make fullscreen screenshot (screenshot correctly has 4k resolution)
3.  watch the screenshot with gwenview at 100% scale (in gwenview)

OBSERVED RESULT
Screenshot is scaled to 66%.
If i set gwenview to 150%, i get the correct size but blur from scaling.

EXPECTED RESULT
No weird scaling, no blur.
1px at the screenshot -> 1px at the screen

SOFTWARE/OS VERSIONS
Operating System: Fedora Linux 38
KDE Plasma Version: 5.27.6
KDE Frameworks Version: 5.108.0
Qt Version: 5.15.10
Kernel Version: 6.4.4-200.fc38.x86_64 (64-bit)
Graphics Platform: Wayland

Comment 1 pixelplanetdev 2023-07-27 17:53:45 UTC

Created attachment 160571 [details]
screenshot of gwenview displaying a screenshot

Comment 2 pixelplanetdev 2023-11-15 08:59:31 UTC

Solved in Plasma 6 alpha