Gdk.Pixbuf done loading?

[Doug Blank <doug blank gmail com>]

I am loading a Gdk.Pixbuf from bytes:

_pixbuf = new Gdk.Pixbuf(bytes);

Then, I'd like to read the _pixbuf data. But, it appears that the data
is actually loading in the background because the data doesn't exist
for a while. If I wait, all is fine.

How can I either know when it is finished, or force the update?

Thanks for any pointers,

-Doug