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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 ## Load an image file. |
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21 ## |
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22 ## [img, map] = loadimage (img_file) loads an image and it's associated |
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23 ## color map from file img_file. The image must be in stored in |
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24 ## octave's image format. |
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25 ## |
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26 ## SEE ALSO: saveimage, load, save |
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27 |
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28 ## Author: Tony Richardson <amr@mpl.ucsd.edu> |
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29 ## Created: July 1994 |
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30 ## Adapted-By: jwe |
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31 |
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32 function [img_retval, map_retval] = loadimage (filename) |
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33 |
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34 if (nargin != 1) |
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35 usage ("[img, map] = loadimage (filename)"); |
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36 elseif (! isstr (filename)) |
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37 error ("loadimage: expecting filename as a string"); |
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38 endif |
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39 |
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40 file = file_in_path (IMAGEPATH, filename); |
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41 |
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42 if (isempty (file)) |
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43 error ("loadimage: unable to find image file"); |
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44 endif |
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45 |
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46 ## The file is assumed to have variables img and map, or X and map. |
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47 |
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48 eval (['load ', file]); |
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49 |
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50 if (exist ("img")) |
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51 img_retval = img; |
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52 elseif (exist ("X")) |
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53 img_retval = X; |
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54 else |
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55 error ("loadimage: invalid image file found"); |
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56 endif |
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57 |
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58 if (exist ("map")) |
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59 map_retval = map; |
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60 else |
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61 error ("loadimage: invalid image file found"); |
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62 endif |
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63 |
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64 endfunction |
