I've noticed that photos created in LightRoom when uploaded to FaceBook
automatically pull copyright information embedded in the EXIF info into the
comments. Despite putting information in all of the EXIF areas when
exporting a JPG, I have been unable to replicate this using Darktable.
Digging through the source, I found in lines 1098 - 1103 of
src/common/exif.cc:
res = dt_metadata_get(imgid, "Xmp.dc.rights", NULL);
if(res != NULL)
{
exifData["Exif.Image.Copyright"] = (char*)res->data;
g_list_free_full(res, &g_free);
}
pulling entered information from src/libs/metadata.c:
line 218:
gchar *rights =
gtk_combo_box_text_get_active_text(GTK_COMBO_BOX_TEXT(d->rights));
lines 226-227:
if(rights != NULL && (d->multi_rights == FALSE ||
gtk_combo_box_get_active(GTK_COMBO_BOX(d->rights)) != 0))
dt_metadata_set(mouse_over_id, "Xmp.dc.rights", rights);
My question is should the Xmp.xmpRights.Marked bool be set true (
http://www.exiv2.org/tags-xmp-xmpRights.html) in addition to this? Or would
it make more sense if the information be stored in the Xmp.plus section (
http://www.exiv2.org/tags-xmp-plus.html)?
I am unfamiliar with how DT, LR, and FaceBook handles this and was hoping
someone could shed some light on it.
Thanks!
Steven Boyer
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