Psychtoolbox>PsychOpenXRCore.{mex*} subfunction

timingSupport = PsychOpenXRCore(‘TimingSupport’ [, openxrPtr]);

Return available level of precise timing and timestamping support for OpenXR
device ‘openxrPtr’. If ‘openxrPtr’ is omitted, a more basic, general assessment
of the OpenXR runtimes capabilities is returned.
Standard unextended OpenXR-1 runtimes, as of March 2025, do not support reliable
visual onset timestamping, and most tested runtimes don’t support reliable onset
timing either. These runtimes will return zero, hinting at the need for
multi-threading tricks for bearable precision.
The open-source Monado runtime does support precise onset timing, and may
support some better onset timestamping for special customized Linux+Monado
versions, or future Monado versions. This would be reported by a combination of
one or more non-zero flags, as described below.
The returned ‘timingSupport’ can be the logical OR of one of these flags:
0 = None. Only use of multi-threading will allow for basic timing and
timestamping, but still of limited trustworthiness!
1 = Some more reliable/trustworthy/accurate timing and timestamping precision
available, however, likely with drawbacks like significantly reduced
performance.

###See also: PresentFrame PresenterThreadEnable