Re: [gthumb-list] rotation during import process

[Paolo Bacchilega <paolo bacchilega libero it>]

Il 29/10/2012 20:33, don Paolo Benvenuto ha scritto:
> Il giorno lun, 29/10/2012 alle 18.59 +0100, Paolo Bacchilega ha scritto:
> > Il 29/10/2012 15:45, Paolo Benvenuto ha scritto:
> > > 2012/10/29 Paolo Bacchilega <paolo bacchilega libero it>:
> > > > Il 29/10/2012 11:56, Paolo Benvenuto ha scritto:
> > > >
> > > > > 2012/10/28 Paolo Bacchilega <paolo bacchilega libero it>:
> > > > > > Il 27/10/2012 22:51, don Paolo Benvenuto ha scritto:
> > > > > >
> > > > > > > I installed today's gthumb from git, and the situation is:
> > > > > > >
> > > > > > > - the thumbnails are shown in the importer windows without taking into
> > > > > > > account the rotation flag: I consider it's a bug, importer should take
> > > > > > > into account orientation
> > > > > > > - if phisical rotation after importing is enabled in preferences, all
> > > > > > > imported images have rotation flags "top, left", and both images and
> > > > > > > thumbnails are shown in gthumb as if a "reset exif flag" preference was
> > > > > > > set: BUG: apparently a wrong function is used, a function which resets
> > > > > > > exif flag instead of a function which phisically rotates the images
> > > > > > > - if phisical rotation after importing is disabled in preferences,
> > > > > > > gthumb shows both images and thumbnails with the correct orientation and
> > > > > > > with the original orientation flags (ok)
> > > > >
> > > > >
> > > > > In extensions/importer/gth-import-task.c, lines 407 , function
> > > > > apply_transformation_async is called with a GTH_TRANSFORM_NONE
> > > > > parameter..... it sounds weird...
> > > >
> > > > It's correct.  The function already takes into account the embedded rotation
> > > > so passing the GTH_TRANSFORM_NONE value means just apply the embedded
> > > > orientation.
> > >
> > > but what actually happens is that image is let as it is, without
> > > phisically modifying it, and exif rotation flags are reset!
> >
> > try to import an image twice, you should see the overwrite confirmation
> > dialog, if the new image (as displayed in the overwrite dialog) is not
> > rotated correctly that means that the embedded orientation is not
> > present in the original file.
>
> I attacched the screenshot of the reimport of the same image, but I
> doesn't understand how I should interpret it.
>
> I attacch a reduced version of the image itself: it was transferred to
> the pc with nautilus from the card reader, gthumb didn't touch it. Maybe
> someone could check whether it has correct exif orientation flags or
> not.

I think that means that there is a bug in gthumb :) because the embedded 
orientation is set correctly (the preview in the overwrite dialog is 
correctly oriented) and for some reason it is deleted when the image is 
saved.

- Paolo