/usr/share/psychtoolbox-3/PsychHardware/BitsPlusToolbox/BitsPlusDecodeClutRow.m is in psychtoolbox-3-common 3.0.11.20140816.dfsg1-1.
This file is owned by root:root, with mode 0o644.
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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 | function theClut = BitsPlusDecodeClutRow(bitsPlusClutRow)
% Recover the 256x3 CLUT table from the 1x524x3 encoded form that we write into
% the first line of the Bits++ image.
% NOTE: this routine takes about 100 times longer than necessary, but it's not time-critical.
% 11/5/02 jmh Wrote it.
% 11/15/02 dgp Cosmetic editing.
% The bits++ CLUT data is located in columns 13:524, i.e. 12+(1:512). There is a pair of one-byte numbers
% for each of the 14 bit values. The first of each pair holds the most significant part of
% the pixel value and the second holds the least significant part.
% We add up these two parts to get the original CLUT back.
theClut=zeros(256,3);
for i = 1:256
theClut(i,1:3) = bitsPlusClutRow(1,12+(i-1)*2+1,1:3)*64 + bitsPlusClutRow(1,12+i*2,1:3)/4;
end
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