Cogl.FrameCallback

function onFrameCallback(onscreen: Cogl.Onscreen, event: Cogl.FrameEvent, info: Cogl.FrameInfo): void {
}

Is a callback that can be registered via Cogl.Onscreen.prototype.add_frame_callback to be called when a frame progresses in some notable way.

Please see the documentation for Cogl.FrameEvent and Cogl.Onscreen.prototype.add_frame_callback for more details about what events can be notified.

Since 1.14

onscreen: The onscreen that the frame is associated with
event: A Cogl.FrameEvent notifying how the frame has progressed
info: The meta information, such as timing information, about the frame that has progressed.