Re: gtkmm: Pixbuf::get_pixels()

[Daniel Boles <dboles src gmail com>]

The copy is done as follows, to support copy-on-write:

 * This function will cause an implicit copy of the pixbuf data if the
 * pixbuf was created from read-only data.

https://git.gnome.org/browse/gdk-pixbuf/tree/gdk-pixbuf/gdk-pixbuf.c#n674

I thought as long as the apparent functioning of the object is still the same to external users, then it is allowed to make internal changes even on a const instance? Using mutable members.

If so, then maybe it would still be OK to wrap that as a const method.