Used to determine how to respond to the area_updated signal on
#GdkPixbufLoader when loading an animation. area_updated is emitted
for an area of the frame currently streaming in to the loader. So if
you're on the currently loading frame, you need to redraw the screen for
the updated area.
Return: %TRUE if the frame we're on is partially loaded, or the last frame
Used to determine how to respond to the area_updated signal on #GdkPixbufLoader when loading an animation. area_updated is emitted for an area of the frame currently streaming in to the loader. So if you're on the currently loading frame, you need to redraw the screen for the updated area.
Return: %TRUE if the frame we're on is partially loaded, or the last frame