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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} {} image (@var{x}, @var{zoom}) |
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22 ## Display a matrix as a color image. The elements of @var{x} are indices |
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23 ## into the current colormap and should have values between 1 and the |
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24 ## length of the colormap. If @var{zoom} is omitted, a value of 4 is |
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25 ## assumed. |
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26 ## @end deftypefn |
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27 |
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28 ## SEE ALSO: imshow, imagesc, colormap. |
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29 |
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30 ## Author: Tony Richardson <arichard@stark.cc.oh.us> |
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31 ## Created: July 1994 |
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32 ## Adapted-By: jwe |
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33 |
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34 function image (x, zoom) |
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35 |
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36 if (nargin == 0) |
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37 ## Load Bobbie Jo Richardson (Born 3/16/94) |
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38 x = loadimage ("default.img"); |
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39 zoom = 2; |
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40 elseif (nargin == 1) |
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41 zoom = 4; |
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42 elseif (nargin > 2) |
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43 usage ("image (matrix, [zoom])"); |
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44 endif |
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45 |
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46 ppm_name = tmpnam (); |
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47 |
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48 saveimage (ppm_name, x, "ppm"); |
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49 |
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50 ## Start the viewer. Try xv, then xloadimage. |
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51 |
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52 xv = sprintf ("xv -expand %f %s", zoom, ppm_name); |
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53 |
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54 xloadimage = sprintf ("xloadimage -zoom %f %s", zoom*100, ppm_name); |
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55 |
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56 rm = sprintf ("rm -f %s", ppm_name); |
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57 |
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58 ## Need to let the shell clean up the tmp file because we are putting |
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59 ## the viewer in the background. |
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60 |
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61 command = sprintf ("( %s || %s && %s ) > /dev/null 2>&1 &", |
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62 xv, xloadimage, rm); |
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63 |
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64 system (command); |
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65 |
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66 endfunction |
