Re: [gexiv2] Include gexiv2 in GNOME-PHOTOS

["HK_Privat" <hk_priv gmx de>]

Yes, you are right. The parameter „self“ is always of type GExiv2Metadata.
It is tested in every function with 

g_return_val_if_fail(GEXIV2_IS_METADATA(self), FALSE);

So you always need valid metadata. Gimp produces a valid metadata object, if needed, by reading them from a 
very small valid JPG with (empty) metadata. (A resized „Wilber“) :-)

Hatti

> Von: gexiv2-list [mailto:gexiv2-list-bounces gnome org] Im Auftrag von Umang Jain
> Gesendet: Sonntag, 10. Januar 2016 15:26
> An: gexiv2-list gnome org
> Betreff: [gexiv2] Include gexiv2 in GNOME-PHOTOS
>
> Hi,
> I am Umang Jain and I am contributing to gnome-photos currently. I am assigned the bug: 
> https://bugzilla.gnome.org/show_bug.cgi?id=759156
> Metadata is lost when a image is edited and exported as new image in gnome-photos. I have to fix this.
>
> I built and installed gexiv2 as per https://wiki.gnome.org/Projects/gexiv2/BuildingAndInstalling
>
> But when I use any function, e.g. gexiv2_metadata_has_tag (self, tag) , it throws me error :
>
> warning: passing argument 1 of ‘gexiv2_metadata_has_tag’ from incompatible pointer type 
> [-Wincompatible-pointer-types]
> Here, self is instance inherited from g_object (using subclassing). Do I need to change it and inherit from 
> GEXIV2_TYPE_METADATA to get it working with gexiv2 functions ? 
> Consider me fairly new contributor. I just started. I also learnt subclassing a few days ago. So, please 
> bear with me and try to keep it simple. Thanks.
> -- 
> Umang J.