Daniel van Vugt f2290877be clutter/frame-clock: Optimize latency for platforms missing TIMESTAMP_QUERY ... Previously if we had no measurements then `compute_max_render_time_us` would pessimise its answer to ensure triple buffering could be reached: ``` if (frame_clock->state == CLUTTER_FRAME_CLOCK_STATE_DISPATCHED_ONE) ret += refresh_interval_us; ``` But that also meant entering triple buffering even when not required. Now we make `compute_max_render_time_us` more honest and return failure if the answer isn't known (or is disabled). This in turn allows us to optimize `calculate_next_update_time_us` for this special case, ensuring triple buffering can be used, but isn't blindly always used. This makes a visible difference to the latency when dragging windows in Xorg, but will also help Wayland sessions on platforms lacking TIMESTAMP_QUERY such as Raspberry Pi. (cherry picked from commit 7852451a9e93f5116fa853350020a318d31cb710) Part-of: <https://gitlab.gnome.org/GNOME/mutter/-/merge_requests/1441> Signed-off-by: Mingi Sung <sungmg@saltyming.net>		2024-10-22 17:13:55 +09:00
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clutter	clutter/frame-clock: Optimize latency for platforms missing TIMESTAMP_QUERY	2024-10-22 17:13:55 +09:00
meson.build	clutter/settings: Remove unused fontconfig-timestamp property	2024-08-22 19:09:51 +00:00