Bug 418872 - Systemsettings 'Get new symbols' overlay icons are blurry on HiDPI
Summary: Systemsettings 'Get new symbols' overlay icons are blurry on HiDPI
Status: RESOLVED LATER
Alias: None
Product: frameworks-knewstuff
Classification: Frameworks and Libraries
Component: general (other bugs)
Version First Reported In: 5.69.0
Platform: Other Linux
: NOR minor
Target Milestone: ---
Assignee: Jeremy Whiting
URL:
Keywords:
Depends on:
Blocks:
 
Reported: 2020-03-15 13:09 UTC by postix
Modified: 2020-12-01 19:59 UTC (History)
4 users (show)

See Also:
Latest Commit:
Version Fixed/Implemented In:
Sentry Crash Report:

Attachments
Screen recording (388.08 KB, video/mp4)
2020-03-15 13:09 UTC, postix 		Details
Screenshot (254.82 KB, image/png)
2020-03-15 14:24 UTC, postix 		Details
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Description postix 2020-03-15 13:09:26 UTC 
Created attachment 126806 [details]
Screen recording

SUMMARY

The overlays in the 'symbol view' are blurry on a HiDPI.

STEPS TO REPRODUCE
1. Systemsettings
2. Symbols
3. Get New Symbols

OBSERVED RESULT

See screen recording.


SOFTWARE/OS VERSIONS
Operating System: Manjaro Linux 
KDE Plasma Version: 5.18.3
KDE Frameworks Version: 5.69.0
Qt Version: 5.14.1
Kernel Version: 5.5.8-1-MANJARO

ADDITIONAL INFORMATION
Scaling: 1.5
Comment 1 postix 2020-03-15 14:24:09 UTC 
Created attachment 126809 [details]
Screenshot

Another example, this time "plasma styles".
Comment 2 Nate Graham 2020-12-01 19:15:12 UTC 
This is unavoidable when using a fractional scale factor, I'm afraid. It's just one of those things you have to learn to live with. :)
Comment 3 postix 2020-12-01 19:45:10 UTC 
(In reply to Nate Graham from comment #2)
> This is unavoidable when using a fractional scale factor, I'm afraid. It's
> just one of those things you have to learn to live with. :)

What I don't quiet understand is, why many icons look fine, while other's do not on HiDPI with fractional scaling. 

Are those which look fine are in luck so that all "pixel patterns" or vector lengths are multiple of two (in case of 1.5 scaling)?
Comment 4 Nate Graham 2020-12-01 19:59:15 UTC 
To be perfectly honest, I'm not sure myself. It may be coincidence that the stroke widths divide cleanly by 1.5, or it could be differences in QtQuick vs QPainter rendering algorithms, or it could be something else entirely.

Sorry I can't be more helpful here. :(