gdk:frame-clock-history-start (clock)

clock -- a gdk:frame-clock object

The unsigned integer frame counter value for the oldest frame that is available in the internal frame history of the frame clock.

The frame clock internally keeps a history of gdk:frame-timings objects for recent frames that can be retrieved with the gdk:frame-clock-timings function. The set of stored frames is the set from the counter values given by the gdk:frame-clock-history-start function and the gdk:frame-clock-frame-counter function, inclusive.