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clutter/frame-clock: Clamp render times to two frames, not one

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Because the buffer queue may grow by an extra frame in triple buffering,
we need measurements exceeding one frame to indicate when and by how much
the scaling is necessary.
This commit is contained in:
Daniel van Vugt 2021-12-13 17:03:44 +08:00
parent 6cc1801e45
commit e4df885306
1 changed files with 2 additions and 2 deletions
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4
clutter/clutter/clutter-frame-clock.c
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@ -390,7 +390,7 @@ clutter_frame_clock_notify_presented (ClutterFrameClock *frame_clock,
CLAMP (frame_clock->last_dispatch_lateness_us + dispatch_to_swap_us +
MAX (swap_to_rendering_done_us, swap_to_flip_us),
frame_clock->shortterm_max_update_duration_us,
frame_clock->refresh_interval_us);
2 * frame_clock->refresh_interval_us);
maybe_update_longterm_max_duration_us (frame_clock, frame_info);
@ -476,7 +476,7 @@ clutter_frame_clock_compute_max_render_time_us (ClutterFrameClock *frame_clock)
frame_clock->vblank_duration_us +
clutter_max_render_time_constant_us;
max_render_time_us = CLAMP (max_render_time_us, 0, refresh_interval_us);
max_render_time_us = CLAMP (max_render_time_us, 0, 2 * refresh_interval_us);
return max_render_time_us;
}