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1 ## Copyright (C) 1996, 1997 John W. Eaton |
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2 ## |
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3 ## This file is part of Octave. |
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4 ## |
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5 ## Octave is free software; you can redistribute it and/or modify it |
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6 ## under the terms of the GNU General Public License as published by |
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7 ## the Free Software Foundation; either version 2, or (at your option) |
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8 ## any later version. |
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9 ## |
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10 ## Octave is distributed in the hope that it will be useful, but |
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11 ## WITHOUT ANY WARRANTY; without even the implied warranty of |
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12 ## MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
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13 ## General Public License for more details. |
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14 ## |
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15 ## You should have received a copy of the GNU General Public License |
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16 ## along with Octave; see the file COPYING. If not, write to the Free |
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17 ## Software Foundation, 59 Temple Place - Suite 330, Boston, MA |
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18 ## 02111-1307, USA. |
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19 |
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20 ## -*- texinfo -*- |
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21 ## @deftypefn {Function File} {[@var{x}, @var{map}] =} loadimage (@var{file}) |
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22 ## Load an image file and it's associated color map from the specified |
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23 ## @var{file}. The image must be stored in Octave's image format. |
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24 ## @end deftypefn |
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25 ## @seealso{saveimage, load, and save} |
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26 |
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27 ## Author: Tony Richardson <arichard@stark.cc.oh.us> |
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28 ## Created: July 1994 |
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29 ## Adapted-By: jwe |
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30 |
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31 function [img_retval, map_retval] = loadimage (filename) |
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32 |
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33 if (nargin != 1) |
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34 usage ("[img, map] = loadimage (filename)"); |
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35 elseif (! isstr (filename)) |
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36 error ("loadimage: expecting filename as a string"); |
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37 endif |
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38 |
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39 file = file_in_path (IMAGEPATH, filename); |
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40 |
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41 if (isempty (file)) |
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42 error ("loadimage: unable to find image file"); |
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43 endif |
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44 |
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45 ## The file is assumed to have variables img and map, or X and map. |
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46 |
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47 eval (sprintf ("load %s", file)); |
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48 |
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49 if (exist ("img")) |
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50 img_retval = img; |
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51 elseif (exist ("X")) |
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52 img_retval = X; |
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53 else |
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54 error ("loadimage: invalid image file found"); |
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55 endif |
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56 |
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57 if (exist ("map")) |
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58 map_retval = map; |
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59 else |
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60 error ("loadimage: invalid image file found"); |
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61 endif |
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62 |
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63 endfunction |
