https://bugs.kde.org/show_bug.cgi?id=412192

--- Comment #7 from Johannes Zarl-Zierl <johan...@zarl-zierl.at> ---
As a note mostly to myself: with my own experiments, the problem is not with
the raw file decoding, but with the preview image:

Experiment 1: Load a portrait .nef file with useRawThumbnails=false
-> thumbnail is in landscape, viewer is in landscape until I zoom in enough to
trigger full raw image decode

Experiment 2: Load a portrait .nef file with useRawThumbnails=true
-> thumbnail is correctly shown in portrait orientation, just like the full raw
image.

Conclusion: When computing a raw thumbnail which is not the embedded jpeg, we
need to apply the rotation.

Side remark: The code for all this is nearly unchanged for many years, and
libraw/libkdcraw don't have anything in their changelogs that hints at a
behavioural change on their side. I'm a little stumped as to why it stopped
working just recently...

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