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## Copyright (C) 1996 John W. Eaton
##
## This file is part of Octave.
##
## Octave is free software; you can redistribute it and/or modify it
## under the terms of the GNU General Public License as published by
## the Free Software Foundation; either version 2, or (at your option)
## any later version.
##
## Octave is distributed in the hope that it will be useful, but
## WITHOUT ANY WARRANTY; without even the implied warranty of
## MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
## General Public License for more details.
##
## You should have received a copy of the GNU General Public License
## along with Octave; see the file COPYING. If not, write to the Free
## Software Foundation, 59 Temple Place - Suite 330, Boston, MA
## 02111-1307, USA.
## Convert an indexed image to red, green, and blue color components.
##
## [R G B] = ind2rgb(X) uses the current colormap for the conversion.
##
## [R G B] = ind2rgb(X,map) uses the specified colormap.
##
## SEE ALSO: rgb2ind, image, imshow, ind2gray, gray2ind.
## Author: Tony Richardson <arichard@stark.cc.oh.us>
## Created: July 1994
## Adapted-By: jwe
function [R, G, B] = ind2rgb (X, map)
if (nargin < 1 || nargin > 2)
usage ("ind2rgb (X, map)");
elseif (nargin == 1)
map = colormap ();
endif
[hi, wi] = size (X);
## XXX FIXME XXX -- we should check size of X and map.
pref = do_fortran_indexing;
unwind_protect
do_fortran_indexing = 1;
R = map (X(:), 1);
G = map (X(:), 2);
B = map (X(:), 3);
R = reshape (R, hi, wi);
G = reshape (G, hi, wi);
B = reshape (B, hi, wi);
unwind_protect_cleanup
do_fortran_indexing = pref;
end_unwind_protect
endfunction
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