04-03-2025, 09:54 AM
Some pointers (no time to develop more that this ATM):
- https://gegl.org/operations/ (there may be some more that are gimp-specific).
- https://gitlab.gnome.org/GNOME/gimp/-/merge_requests/2008
- https://developer.gimp.org/api/3.0/libgimp/method.Drawable.merge_new_filter.html