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[project @ 1995-01-11 20:30:04 by jwe]
author jwe
date Wed, 11 Jan 1995 20:30:04 +0000
parents 3470f1e25a79
children 611d403c7f3d
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1 # Copyright (C) 1995 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 the
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7 # Free Software Foundation; either version 2, or (at your option) any
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8 # later version.
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9 #
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10 # Octave is distributed in the hope that it will be useful, but WITHOUT
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11 # ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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12 # FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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13 # 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, 675 Mass Ave, Cambridge, MA 02139, USA.
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18
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19 function image (x, zoom)
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21 # Display an octave image matrix.
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22 #
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23 # image (x) displays a matrix as a color image. The elements of x are
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24 # indices into the current colormap and should have values between 1
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25 # and the length of the colormap.
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26 #
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27 # image (x, zoom) changes the zoom factor. The default value is 4.
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28 #
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29 # SEE ALSO: imshow, imagesc, colormap.
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30
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31 # Written by Tony Richardson (amr@mpl.ucsd.edu) July 1994.
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33 if (nargin == 0)
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34 # Load Bobbie Jo Richardson (Born 3/16/94)
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35 x = loadimage ("default.img");
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36 zoom = 2;
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37 elseif (nargin == 1)
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38 zoom = 4;
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39 elseif (nargin > 2)
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40 usage ("image (matrix, [zoom])");
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41 endif
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42
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43 # XXX FIXME XXX -- we should use octave_tmp_file_name.
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44
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45 rnd_str = num2str (fix (rand * 10000));
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46 ppm_name = ["image.", rnd_str, ".ppm" ];
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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 xloadimage = sprintf ("xloadimage -zoom %f %s", zoom*100, ppm_name);
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54 rm = sprintf ("rm -f %s", ppm_name);
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55
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56 command = sprintf ("( %s || %s && %s ) > /dev/null 2>&1 &", ...
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57 xv, xloadimage, rm);
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58
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59 system (command);
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61 endfunction