PixbufModulePreparedFunc
Defines the type of the function that gets called once the initial setup of @pixbuf is done.
#GdkPixbufLoader uses a function of this type to emit the "area_prepared" signal.
param
pixbuf
the #GdkPixbuf that is currently being loaded.param
anim
if an animation is being loaded, the #GdkPixbufAnimation, else null.