Created attachment 132845 [details] example of photo that cause bug of gwenview SUMMARY I'cant explain it too much. But here is a steps to reproduce. I add an example of the photo. STEPS TO REPRODUCE 1. Open chromium browser 2. Install this extension: https://chrome.google.com/webstore/detail/gofullpage-full-page-scre/fdpohaocaechififmbbbbbknoalclacl 3. Capture a fullpage website using it. 4. Save it. 5. Open it using gwenview. 6. Zoom in. 7. Do the panning to upper section of photo. OBSERVED RESULT weird square border EXPECTED RESULT photo panned successfully SOFTWARE/OS VERSIONS Windows: macOS: Linux/KDE Plasma: OpenSUSE Tumbleweed 20201026 (available in About System) KDE Plasma Version: 5.20.1 KDE Frameworks Version: 5.75.0 Qt Version: 5.15.1 ADDITIONAL INFORMATION -
Created attachment 132846 [details] Screenshot of the gwenview bug.
I'm unable to replicate this on Gwenview from git master.
I try to disable display fractional scaling and the repeated square is not exist anymore. hmm....
Thanks for the extra troubleshooting Azis, I'll check with some of the devs and see what they say.
Likely a duplicate of bug #271671
Git commit 955df5addac77b49c8349e6477806dbf27bde238 by Vlad Zahorodnii. Committed on 01/02/2021 at 18:35. Pushed by vladz into branch 'release/20.12'. Fix visual artifacts when panning zoomed in image on HiDPI The size of the viewport rectangle needs to be in the device-independent pixels; otherwise there will be visual artifacts when panning a zoomed in translucent image. Related: bug 417342, bug 414776 M +6 -6 lib/documentview/rasterimageview.cpp https://invent.kde.org/graphics/gwenview/commit/955df5addac77b49c8349e6477806dbf27bde238