Created attachment 176417 [details] example of aliases in gwenview SUMMARY Antialiasing in image previews would help a lot with images that have a lot of small elements (e.g. technical drawings) Please see below how lines on the first image get completely aliased. https://0x0.st/Xhsv.png STEPS TO REPRODUCE 1. gwenview image1.png image2.png OBSERVED RESULT observe aliased lines (if images have them) EXPECTED RESULT antialiasing applied to images in browse mode (preview grid) SOFTWARE/OS VERSIONS Linux/KDE Plasma: KDE Plasma Version: 6.2.4 KDE Frameworks Version: 6.8.0 Qt Version: 6.8.0 ADDITIONAL INFORMATION
just discovered that some antialiasing can be turned on by checking on this setting: open menu > configure > configure gwenview > advanced > low resource usage mode it doesn't seem right though that this, fairly important feature is a side effect of a seemingly unrelated feature.
I can reproduce the issue, and the workaround, on Gwenview 24.12.0. Thumbnails in Dolphin for the same images are clear and smooth (both on the file icons themselves, and in the Information pane), and thumbnails in Gwenview are perfectly smooth when generated in Low resource usage mode, so perhaps there is something in how the pre-existing system thumbnails are displayed that is working differently specifically in Gwenview?
I was just setting up a Kubuntu system for a non-techie friend who comes from the Apple/iPhone world where everything looks smooth and nice. Gwenview's jagged, aliased thumbnails makes it look like KDE is stuck in the late 90's. It's embarrassing that this is the default setting in the default image viewer, and this alone made me want to find another program for her. #c1 mentions a workaround. I had actually seen that option before, but didn't connect disabling thumbnail creation to give me anti-aliased thumbnails, especially as the help text under the option says, "...prefer thumbnails of lower quality". I don't think anyone is taking advantage of this setting, except a few rare explorers. Could the Gwenview developers please flip the bit to enable anti-aliasing for thumbnails? It makes my technical drawings hard to read as well.
The version field is intended for the version in which the bug was originally reported and identified - please leave that set as-is so that information can be appropriately tracked by developers. Thanks!
(In reply to 3kc2awgy from comment #1) > just discovered that some antialiasing can be turned on by checking on this > setting: > open menu > configure > configure gwenview > advanced > low resource usage > mode > it doesn't seem right though that this, fairly important feature is a side > effect of a seemingly unrelated feature. I have been playing with enabling this setting but it makes some photo thumbnails look horrible, so it's not worth it, and I had to turn it back off. The true fix is to enable filtering for all thumbnails. This is 2025, we all have the CPU horsepower to do this. Even Dolphin has filtering for all thumbnails now.