On Dienstag, 17. März 2009 22:05:04 you wrote:
> Hi,
> On Tue, 2009-03-17 at 21:55 +0100, Sebastian Kraft wrote:
> > I saw in file-jpeg/jpeg.c that EXIF data simply is read into
> > ExifData struct via a libexif function. This only keeps EXIF from
> > jpeg -> jpeg because there is no global ExifData to store exif
> > information during editing.
> >
> > So what would you propose how to transfer exif data from one
> > filetype to another?  Where to add something like a global EXIF
> > data struct?
> You missed some important bits then. The EXIF data is attached to
> the image as "exif-data' parasite. This is used by other file
> plug-ins as well. There is also ongoing work to replace this by a
> more general "gimp-metadata" parasite, but this is not finished.

Oh Thats what I missed... Thanks so far. I will take a deper look and 
try to work on this

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