Bug 410558

Summary: Icons rendered on the desktop show poor (or no) anti aliasing. I.E. icon edges are jagged
Product: [Plasma] plasmashell Reporter: kiltpiper
Component: Desktop icons & Folder View widgetAssignee: Eike Hein <hein>
Status: RESOLVED FIXED    
Severity: minor CC: nate, plasma-bugs
Priority: NOR    
Version First Reported In: 5.12.8   
Target Milestone: 1.0   
Platform: Kubuntu   
OS: Linux   
Latest Commit: Version Fixed In:
Sentry Crash Report:
Attachments: Screenshot of icons on the desktop with poor rendering

Description kiltpiper 2019-08-04 02:39:06 UTC
Created attachment 121921 [details]
Screenshot of icons on the desktop with poor rendering

SUMMARY
Icons rendered on the desktop show poor anti aliasing (in other words: edges that border transparent pixels are jagged) This is seen at all icon sizes; tiny, small, huge, etc..  However, icons seen throughout the rest of the KDE plasma GUI (for example icons viewed in Dolphin File Manager), render with clean, anti-aliased edges.  

One quirk, image files that live on the desktop (.png, .svg. etc) render cleanly.  See attached image, "KDE_Desktop_Icon_Rendering_Poor_Aliasing.png"  In this screen grab you'll note that the file named "drawing.svg" renders a clean edged preview while the other two icons do not (one of these badly rendered icons belongs to a folder named "TEST" which is, actually, using the "drawing.svg" image as its icon).



STEPS TO REPRODUCE
1. Create a folder, application, document, or link with an icon on the desktop


OBSERVED RESULT
Poor icon rendering (possibly scaling issue?) resulting in aliased, jagged edges around the edges of the icons.

EXPECTED RESULT
Clean icon rendering with anti-aliased edges that is consistent with the rest of the KDE Plasma environment

SOFTWARE/OS VERSIONS

Linux/KDE Plasma: Kubuntu 18.04
(available in About System)
KDE Plasma Version: 5.12.8
KDE Frameworks Version: 5.44.0
Qt Version: 5.9.5

ADDITIONAL INFORMATION
Comment 1 kiltpiper 2019-08-04 03:59:26 UTC
My system uses dual head displays - both are 2560x1440. The displays are not scaled in any way, they are set to their native resolution.
Comment 2 Nate Graham 2019-08-05 03:51:09 UTC
This was fixed in a later Plasma version; 5.14 IIRC though I can't quite remember anymore.