/usr/share/psychtoolbox-3/PsychCal/GamutToSettingsSch.m is in psychtoolbox-3-common 3.0.9+svn2579.dfsg1-1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 | function settings = GamutToSettingsSch(gammaInput, gammaTable, gamut)
% settings = GamutToSettingsSch(gammaInput, gammaTable, gamut)
%
% Find the best device settings to produce
% the passed linear device coordinates.
%
% The passed coordinates should be in the range [0,1].
% The returned settings also run from [0,1], but after
% inversion of the device's gamma measurements.
%
% 9/26/93 dhb Added calData argument.
% 10/19/93 dhb Allow gamma table dimensions to exceed device settings.
% 11/11/93 dhb Update for new calData routines.
% 8/4/96 dhb Update for stuff bag routines.
% dhb Pulled out as a subroutine.
% 8/21/97 dhb Convert for structures.
% 11/16/06 dhb Adjust for [0,1] world.
% dhb No more values return because we can't get at it in the [0,1] world
% dhb Pass input x values as well as y values.
% Check dimensions and table sizes
[m,n] = size(gamut);
[mg,ng] = size(gammaTable);
if (m > ng)
error('Mismatch between device coordinate dimensions and gamma table');
end
% Use a search routine to find the best gamma function
settings = zeros(m,n);
% values = zeros(m,n);
for i = 1:m
settings(i,:) = SearchGammaTable(gamut(i,:), gammaInput, gammaTable(:,i));
end
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