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Dor Askayo d5f68c8140 clutter/frame-clock: Add a mode for variable scheduling
A new variable scheduling mode is introduced which allows lower
priority updates to be scheduled on a timeout which represents a lower
refresh rate, while allowing high priority updates to be scheduled to
occur as soon as possible.

This mode will be used by following commits to implement
synchronization of page flips to the update rate of specifc surface
actors.

High priorty updates are either scheduled to occur "now" if they
arrive at a rate which is lower than the maximum refresh rate, or
according to the measured maximum render time if they arrive at a
rate which meets or exceeds the maximum refresh rate. This approach
allows achieving low input latency in both scenarios.

Seperate handling for low priority updates is needed to avoid visible
stutter in the content of the surface that drives the refresh rate. An
example for a low priority update is cursor movement when the KMS
deadline timer is disabled.

Part-of: <https://gitlab.gnome.org/GNOME/mutter/-/merge_requests/1154>
2024-03-02 12:08:21 +00:00
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clutter clutter/frame-clock: Add a mode for variable scheduling 2024-03-02 12:08:21 +00:00
meson.build clutter: Explicitly depend on cairo 2024-01-27 10:03:15 +00:00