We only have implementations of this on X11 and Win32,
so make it available as backend api there.
Update all callers to use either the backend api, or
just monitor 0.
Now that GdkFrameClock is a class, not interface, there's no real advantage
to splitting the frame history into an aggregate object, so directly
merge it into GdkFrameClock.
Add a very simple GtkWidget function for an "tick" callback, which
is connected to the ::update signal of GdkFrameClock.
Remove:
- GtkTimeline. The consensus is that it is too complex.
- GdkPaintClockTarget. In the rare cases where tick callbacks
aren't sufficient, it's possible to track the
paint clock with ::realize/::unrealize/::hierarchy-changed.
GtkTimeline is kept using ::update directly to allow using a GtkTimeline
with a paint clock but no widget.
Show the average and standard deviation of the latency in addition to
the frame rate. Add options to print the output in machine-readable form,
and to control the frequency and total number of statistics that will be
output.
https://bugzilla.gnome.org/show_bug.cgi?id=685460
Add a test of a window with an animated size and contents. The
test accepts load factor command line argument to see how things
work as the drawing of the content requires more GPU resources.
https://bugzilla.gnome.org/show_bug.cgi?id=685460
