/usr/share/octave/site/m/pfstools/pfs_write_rgb.m is in octave-pfstools 2.1.0-3.
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 | function pfs_write_rgb( fileName, R, G, B )
## Write an hdr image file (formats accepted by pfsout). You can
## specify additional options in fileName, such as
## "--compression=PXR24" for OpenEXR files. Check manual pages of
## pfsout* commands for the list of available options.
##
## pfs_write_rgb( fileName, R, G, B )
unwind_protect
fid = popen( sprintf( "pfsout %s", fileName ), "w" );
pfs = pfsopen( fid, size( R ) );
pfs.channels = struct;
[pfs.channels.X pfs.channels.Y pfs.channels.Z] = ...
pfstransform_colorspace( "RGB", R, G, B, "XYZ" );
pfsput( pfs );
unwind_protect_cleanup
pfsclose( pfs );
fclose( fid );
end_unwind_protect
endfunction
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