0.93.1 EXIF Rotation Not Updating Timestamp

[metal450]

XnViewMP v0.93.1 64bits for Windows

With all of the "Keep original date/time" options disabled (shown here: https://imgur.com/6IsvcJ1) and "Change EXIF orientation only" enabled (shown here: https://imgur.com/3KscmRm)...

...In Browse Mode, the buttons "Rotate Clockwise" and "Rotate Counter Clockwise" (shown here: https://imgur.com/4jtyZv1) do NOT update the timestamp of the file when used (bug #1).

In View Mode, if you customize the toolbar to add those two commands - "Rotate Clockwise" and "Rotate Counter Clockwise" (shown here: https://imgur.com/g8efh2l), it DOES update the timestamp of the file, as expected. However, you'll notice that the buttons are missing their icons (bug #2)

[xnview]

Thanks to your detailed description I can reproduce the problem.

[metal450]

Addendum: in the case of the view mode, as mentioned, it is updating the timestamp. However, on closer examination, it's not actually always rotating by just setting the exif flag - sometimes it's still transposing the x,y pixels, contrary to the setting (verified by using BeyondCompare to diff the before/after image files). This doesn't occur for all photos - just some.

So:

1) In Browse, rotate doesn't update the timestamp (despite settings)
2) In View, rotate buttons are missing icons
3) In View, rotate is not doing so via exif flag for some photos (despite settings)

[xnview]

See issue for current status and some details.

[xnview]

This problem is supposed to be fixed in XnView MP 0.94. Please check and confirm the bug fix here.

[metal450]

Oops, I guess I missed the notification that you replied here. To respond very late:

>1) In Browse, rotate doesn't update the timestamp (despite settings)

Fixed.

>2) In View, rotate buttons are missing icons

Not fixed.

>3) In View, rotate is not doing so via exif flag for some photos (despite settings)

Not fixed. To make this easier to see, here's an example photo before & after doing "exif" (lossless) rotation:

https://www.dropbox.com/scl/fi/klkweo27 ... yufukbq8xj
https://www.dropbox.com/scl/fi/qlkhhykt ... gjmjx4qt5z

You'll notice that after, the image height is reduced from 2268 to 2256 (8 pixels were chopped off), the filesize is *smaller*, and the exif orientation is unchanged. Also, if I again rotate it 2 more times so it's back to its original orientation, it remains at the smaller resolution and smaller filesize, so it could not have been lossless. If it was lossless, it should've just changed the exif rotation flag, and then changed it back, yielding the same original photo.