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function resultFlag = IsWayland
% resultFlag = IsWayland
%
% Returns true if the script is running on a Wayland display server.
%
% Some scripts need to behave differently when running under
% Wayland. The main advantage of Wayland is that visual presentation
% timing and timestamping should be accurate, robust and reliably
% under all conditions, ie., also for non-fullscreen "windowed" windows,
% half-transparent windows, GUI windows etc.
% History:
% 31-Dec-2014 mk Written.
persistent rc;
if isempty(rc)
% If the built-in variable OCTAVE_VERSION exists,
% then we are running under GNU/Octave, otherwise not.
if ~isempty(getenv('WAYLAND_DISPLAY'))
rc = 1;
else
rc = 0;
end
end
resultFlag = rc;
return;
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