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frame-clock: Add callback before the actual frame callback

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Aimed to have the frame listener do things like processing events before
the actual frame. In between the before-frame and actual frame,
timelines will be advanced.

https://gitlab.gnome.org/GNOME/mutter/-/merge_requests/1285
This commit is contained in:
Jonas Ådahl
2020-03-25 09:20:38 +01:00
parent 6ffdfff9ee
commit cae5b99537
3 changed files with 83 additions and 1 deletions
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14
clutter/clutter/clutter-frame-clock.c
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@ -255,6 +255,7 @@ static gboolean
clutter_frame_clock_dispatch (gpointer user_data)
{
ClutterFrameClock *frame_clock = user_data;
int64_t frame_count;
ClutterFrameResult result;
COGL_TRACE_BEGIN_SCOPED (ClutterFrameCLockDispatch, "Frame Clock (dispatch)");
@ -263,9 +264,20 @@ clutter_frame_clock_dispatch (gpointer user_data)
frame_clock->state = CLUTTER_FRAME_CLOCK_STATE_DISPATCHING;
frame_count = frame_clock->frame_count++;
COGL_TRACE_BEGIN (ClutterFrameClockEvents, "Frame Clock (before frame)");
if (frame_clock->listener.iface->before_frame)
{
frame_clock->listener.iface->before_frame (frame_clock,
frame_count,
frame_clock->listener.user_data);
}
COGL_TRACE_END (ClutterFrameClockEvents);
COGL_TRACE_BEGIN (ClutterFrameClockFrame, "Frame Clock (frame)");
result = frame_clock->listener.iface->frame (frame_clock,
frame_clock->frame_count++,
frame_count,
frame_clock->listener.user_data);
COGL_TRACE_END (ClutterFrameClockFrame);