PixbufAnimationIter.advance

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.