Bug 413432

Summary:	Folder View generates unsharp landscape thumbnails (whereas portrait/square thumbnails look fine).
Product:	[Plasma] plasmashell	Reporter:	Gerhard Dittes <g-a-d>
Component:	Desktop icons & Folder View widget	Assignee:	Eike Hein <hein>
Status:	RESOLVED DUPLICATE
Severity:	normal	CC:	kde, nate, plasma-bugs-null
Priority:	NOR	Flags:	kde: Usability- g-a-d: VisualDesign+
Version First Reported In:	master
Target Milestone:	1.0
Platform:	Neon
OS:	Linux
See Also:	https://bugs.kde.org/show_bug.cgi?id=391315
Latest Commit:		Version Fixed/Implemented In:
Sentry Crash Report:
Attachments:	Screenshot showing the quality differences/decrease between portrait and landscape images in "Folder View"

Description Gerhard Dittes 2019-10-25 12:25:00 UTC

SUMMARY

Folder View (/Desktop) generates poor image previews -- but only for landscape images.

I.e., for the case that the with of the image is bigger than its height, the corresponding thumbnail gets exremely "unsharp". Square or landscape images look satisfactorily, though.

Please see attached screenshot (also showing a comparison with Dolphin).


STEPS TO REPRODUCE

1. Put an image having landscape size on your Desktop (e.g. a common photo, ratio 4:3) 
2. Put another image with portrait properties on your Desktop or make a copy of the first one and cut it to portrait (e.g. ratio 2:3)


OBSERVED RESULT

First image looks unsharp. Second image looks fine.


EXPECTED RESULT

Both images look sharp.


SOFTWARE/OS VERSIONS

Linux/KDE Plasma: Debian GNU/Linux & KDE Neon Unstable Edition

KDE Plasma Version: 1.14.5 & 1.17.80
KDE Frameworks Version: 5.54.0 & 5.62.0
Qt Version: 5.11.3 & 5.13.1


ADDITIONAL INFORMATION

Related (resolved) bugs:
https://bugs.kde.org/show_bug.cgi?id=355592
https://bugs.kde.org/show_bug.cgi?id=376848

Comment 1 Gerhard Dittes 2019-10-25 12:26:35 UTC

Created attachment 123474 [details]
Screenshot showing the quality differences/decrease between portrait and landscape images in "Folder View"

Comment 2 Gerhard Dittes 2019-10-25 12:37:15 UTC

Regarding the attachment, the images with the motorcycles provide obviously better examples than those with the beer (my bad ;-) ).

Comment 3 Nate Graham 2019-11-05 18:53:13 UTC


*** This bug has been marked as a duplicate of bug 391315 ***