D26648: Improved quality of JPEG thumbnails
Stefan BrĂ¼ns
noreply at phabricator.kde.org
Tue Jan 14 03:20:43 GMT 2020
bruns added a comment.
Unfortunately, the QImage**Reader** documentation is not very clear about the effect of `setQuality(..)`. There is a reference to `https://doc.qt.io/qt-5/qimagereader.html#setScaledSize`, and that in turn has a reference to `QImage::scale()` (which no longer exists in Qt5) and `Qt::SmoothScaling`.
Looking a the images (which lack any legend, so are hard to interpret), a quality of 0 seems to trigger something like nearest neighbor scaling.
For very large images, a fast approximation may still be better.
REPOSITORY
R320 KIO Extras
REVISION DETAIL
https://phabricator.kde.org/D26648
To: chroniceel, broulik, #frameworks, #vdg
Cc: bruns, ngraham, kde-frameworks-devel, kfm-devel, pberestov, iasensio, fprice, LeGast00n, MrPepe, fbampaloukas, alexde, GB_2, Codezela, feverfew, meven, michaelh, spoorun, navarromorales, firef, andrebarros, emmanuelp, mikesomov
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