[digikam] [Bug 509976] PNG and HEIF not rotated correctly

[Maik Qualmann]

https://bugs.kde.org/show_bug.cgi?id=509976

--- Comment #13 from Maik Qualmann <metzpinguin at gmail.com> ---
1) When converting from TIFF to PNG, the image is of course not automatically
rotated; the PNG is aligned identically to the TIFF. The step of automatically
rotating according to Exif information is necessary. The lossy rotation option
must be enabled for this.

There is no loss with PNG, however, because the compression algorithm is not
lossy.

2) The same as with PNG, but the HEIF image must be re-encoded, so loss may
occur.

It's best to temporarily disable the display of images rotated according to
Exif information in digiKam. Then you'll see images as your users see them with
programs that don't support this.

The only thing we might actually need to do is add an option/tool ​​in BQM to
rotate images based on Exif information.

Maik

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