Created attachment 91780 [details] Thumbnail comparison of the same file between KFileDialog and Dolphin. The scaling quality (smoothness) of image file previews is bad looking and inferior to the one Dolphin is using.
To me the scaling of the KFileDialog preview looks aliased and pixelated whereas Dolphin's smooth.
*** Bug 391452 has been marked as a duplicate of this bug. ***
Still an issue with KF 5.45.
Git commit 1b721c4b25e4a259cbd42812b572b78cbd5e9ccc by Alex Nemeth. Committed on 03/05/2018 at 10:09. Pushed by anemeth into branch 'master'. Thumbnail smooth scaling in filepicker Summary: The scaling of thumbnail previews in the Open/Save dialog was done with the fast transformation that looked out of place and ugly. This uses the same scaling method as Dolphin to look consistent and nice too. FIXED-IN: 5.46 Test Plan: Before: {F5815324} After: {F5815325} Dolphin for reference uses smooth transformation: {F5815326} Reviewers: #frameworks, #vdg, ngraham, elvisangelaccio, rkflx Reviewed By: #vdg, ngraham, rkflx Subscribers: cfeck, broulik, ngraham, #frameworks Tags: #frameworks Maniphest Tasks: T8552 Differential Revision: https://phabricator.kde.org/D12385 M +1 -1 src/filewidgets/kfilepreviewgenerator.cpp https://commits.kde.org/kio/1b721c4b25e4a259cbd42812b572b78cbd5e9ccc