9d54ef3994
A flag indicating whether the presentation timestamp was provided by the display hardware (rather than sampled in user space). It will be used for the presentation-time Wayland protocol. This is definitely the case for page_flip_handler(), and I'm assuming this is also the case for the two instances in the GLX code. Part-of: <https://gitlab.gnome.org/GNOME/mutter/-/merge_requests/1484>