https://bugs.kde.org/show_bug.cgi?id=411262
Bug ID: 411262
Summary: Downscaling issues in Icons with Preview Mode enabled
Product: kio-extras
Version: 17.12.3
Platform: Ubuntu Packages
OS: Linux
Status: REPORTED
Severity: minor
Priority: NOR
Component: Thumbnails and previews
Assignee: plasma-b...@kde.org
Reporter: hoperidesal...@protonmail.ch
Target Milestone: ---
Created attachment 122333
--> https://bugs.kde.org/attachment.cgi?id=122333&action=edit
downscaling comparison image
SUMMARY
Downscaling method used in Dolphin is quite lacking and makes the images too
pixel-y/sharp, for the lack of better word.
STEPS TO REPRODUCE
1. Find an image with 4:3 aspect ratio (I've added 3 in attachments, you can
download there)
2. Switch to Icon view mode and enable Preview, increase preview size to 256px
OBSERVED RESULT
Relatively jarring downscaling.
EXPECTED RESULT
Better downscaling regarding image previews.
SOFTWARE/OS VERSIONS
Linux/KDE Plasma: Ubuntu 18.04.2 LTS x86_64
(available in About System)
KDE Plasma Version:
KDE Frameworks Version: 5.44.0
Qt Version: 5.9.5 (built against 5.9.5)
ADDITIONAL INFORMATION
Images in the bottom have been downscaled to 256px in Nomacs with Area
downscale. Also, this issue was the most observable in images with 4:3 aspect
ratio but I'm not sure if it's limited to that.
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