Bug 508414 - KolourPaint image preview is pixelated with display scaling >100%
Summary: KolourPaint image preview is pixelated with display scaling >100%
Status: RESOLVED DUPLICATE of bug 436615
Alias: None
Product: kolourpaint
Classification: Applications
Component: general (other bugs)
Version First Reported In: 25.04.0
Platform: Debian stable Linux
: NOR normal
Target Milestone: ---
Assignee: kolourpaint-support
URL:
Keywords:
Depends on:
Blocks:
 
Reported: 2025-08-18 09:20 UTC by Carlos Suele
Modified: 2025-08-18 12:56 UTC (History)
1 user (show)

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

Attachments
App window (85.08 KB, image/png)
2025-08-18 09:20 UTC, Carlos Suele 		Details
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Description Carlos Suele 2025-08-18 09:20:09 UTC 
Created attachment 184201 [details]
App window

SUMMARY
KolourPaint image preview is pixelated when display scaling is set above 100%

STEPS TO REPRODUCE

Set display scaling to more than 100% (e.g. 125% or 150%).

Open an image in KolourPaint.

Look at the internal image preview.

OBSERVED RESULT
The image preview looks very pixelated and low-quality.

EXPECTED RESULT
The image preview should scale smoothly without pixelation.

SOFTWARE/OS VERSIONS
Linux/KDE Plasma: Debian GNU/Linux 13
KDE Plasma Version: 6.3.6
KDE Frameworks Version: 6.13.0
Qt Version: 6.8.2
Kernel Version: 6.15.8-061508-generic (64-bit)
Graphics Platform: X11
Processors: 12 × Intel® Core™ i5-10400F CPU @ 2.90GHz
Memory: 16 GiB of RAM (15.5 GiB usable)
Graphics Processor: AMD Radeon RX 580 Series
Manufacturer: ASUS

ADDITIONAL INFORMATION
See attached screenshot: the image preview in KolourPaint looks very pixelated when display scaling is above 100%.
Comment 1 Patrick Silva 2025-08-18 12:56:09 UTC 

*** This bug has been marked as a duplicate of bug 436615 ***