As a shortcut, pass NULL for the current time and glib.global.getCurrentTime
will be invoked on your behalf. So you only need to explicitly pass
current_time if you're doing something odd like playing the animation
at double speed.
If this function returns FALSE, there's no need to update the animation
display, assuming the display had been rendered prior to advancing;
if TRUE, you need to call gdkpixbuf.pixbuf_animation_iter.PixbufAnimationIter.getPixbuf
and update the display with the new pixbuf.
Possibly advances an animation to a new frame.
Chooses the frame based on the start time passed to gdkpixbuf.pixbuf_animation.PixbufAnimation.getIter.
current_time would normally come from glib.global.getCurrentTime, and must be greater than or equal to the time passed to gdkpixbuf.pixbuf_animation.PixbufAnimation.getIter, and must increase or remain unchanged each time gdkpixbuf.pixbuf_animation_iter.PixbufAnimationIter.getPixbuf is called. That is, you can't go backward in time; animations only play forward.
As a shortcut, pass NULL for the current time and glib.global.getCurrentTime will be invoked on your behalf. So you only need to explicitly pass current_time if you're doing something odd like playing the animation at double speed.
If this function returns FALSE, there's no need to update the animation display, assuming the display had been rendered prior to advancing; if TRUE, you need to call gdkpixbuf.pixbuf_animation_iter.PixbufAnimationIter.getPixbuf and update the display with the new pixbuf.