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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.
## Load an image file.
##
## [img, map] = loadimage (img_file) loads an image and it's associated
## color map from file img_file. The image must be in stored in
## octave's image format.
##
## SEE ALSO: saveimage, load, save
## Author: Tony Richardson <arichard@stark.cc.oh.us>
## Created: July 1994
## Adapted-By: jwe
function [img_retval, map_retval] = loadimage (filename)
if (nargin != 1)
usage ("[img, map] = loadimage (filename)");
elseif (! isstr (filename))
error ("loadimage: expecting filename as a string");
endif
file = file_in_path (IMAGEPATH, filename);
if (isempty (file))
error ("loadimage: unable to find image file");
endif
## The file is assumed to have variables img and map, or X and map.
eval (['load ', file]);
if (exist ("img"))
img_retval = img;
elseif (exist ("X"))
img_retval = X;
else
error ("loadimage: invalid image file found");
endif
if (exist ("map"))
map_retval = map;
else
error ("loadimage: invalid image file found");
endif
endfunction
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