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

[bugzilla_noreply at kde.org]

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

--- Comment #10 from ferse_palette.0y at icloud.com ---
(In reply to Maik Qualmann from comment #9)
> You just need to check the box for lossy rotation in the settings, that's
> all. And you should enable writing metadata with ExifTool.

Thank you. What I don’t understand:

1) How does that affect rotation of PNG images? PNGs are always lossless,
right? Do you have an explanation for the behaviour of digikam with the file I
sent earlier? 

2) When I activate the box for lossy rotation, the HEIF gets indeed rotated
when I force it through Auto Rotate/Flip Using Exif Information, but then it is
also rotated with loss, when before I saved it lossless (I chose the lossless
HEIF export). Is there a way to rotate HEIF lossless, or is HEIF-support still
too marginal / recent?

Have a great day!

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