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annotate scripts/image/private/__imwrite__.m @ 17854:adb0ba0d0c13

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imwrite: implement DelayTime option. * __magick_read__.cc (F__magick_write__): set animationDelay() when writing an image to implement the DelayTime option. * private/__imwrite__.m: input check for the new option DelayTime and set its default. Organize options in alphabetic order. * imwrite.m: document new option.
author Carnë Draug <carandraug@octave.org>
date Tue, 05 Nov 2013 05:48:56 +0000
parents aacb9da13df6
children bfbe5dcc9943
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
rev   line source
17744
d63878346099 maint: Update copyright notices for release.
John W. Eaton <jwe@octave.org>
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1 ## Copyright (C) 2008-2013 John W. Eaton
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2 ## Copyright (C) 2013 Carnë Draug
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3 ##
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4 ## This file is part of Octave.
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5 ##
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6 ## Octave is free software; you can redistribute it and/or modify it
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7 ## under the terms of the GNU General Public License as published by
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8 ## the Free Software Foundation; either version 3 of the License, or (at
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9 ## your option) any later version.
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10 ##
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11 ## Octave is distributed in the hope that it will be useful, but
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12 ## WITHOUT ANY WARRANTY; without even the implied warranty of
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13 ## MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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14 ## General Public License for more details.
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15 ##
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16 ## You should have received a copy of the GNU General Public License
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17 ## along with Octave; see the file COPYING. If not, see
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18 ## <http://www.gnu.org/licenses/>.
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19
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20 ## This function does all the work of imwrite. It exists here as private
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21 ## function so that imwrite can use other functions if imformats is
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22 ## configured to. It is also needed so that imformats can create a
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23 ## function handle for it.
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24
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25 function __imwrite__ (img, varargin)
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26
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27 if (nargin < 2 || ! (isnumeric (img) || islogical (img)))
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28 print_usage ("imwrite");
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29 endif
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30
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31 [filename, ext, map, param_list] = imwrite_filename (varargin{:});
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32
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33 if (isempty (img))
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34 error ("imwrite: invalid empty image");
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35 elseif (issparse (img) || issparse (map))
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36 error ("imwrite: sparse images are not supported");
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37 endif
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38
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39 if (rem (numel (param_list), 2) != 0)
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40 error ("imwrite: no pair for all arguments (odd number left)");
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41 endif
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42
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43 ## set default for options
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44 options = struct ("writemode", "overwrite",
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45 "quality", 75,
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46 "delaytime", ones (1, size (img, 4)) *500, # 0.5 seconds
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47 "loopcount", 0, ## this is actually Inf
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48 "alpha", cast ([], class (img)));
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49
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50 for idx = 1:2:numel (param_list)
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51
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52 switch (tolower (param_list{idx}))
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53
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54 case "alpha"
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55 options.alpha = param_list{idx+1};
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56 if (! isnumeric (options.alpha))
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57 error ("imwrite: value for %s option must be a numeric matrix",
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58 param_list{idx});
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59 elseif (size (options.alpha, 3) != 1)
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60 error ("imwrite: 3rd dimension of matrix for %s must be singleton",
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61 param_list{idx});
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62 elseif (ndims (options.alpha) > 4 ||
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63 any (size (options.alpha)([1 2]) != size (img)([1 2])) ||
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64 size (options.alpha, 4) != size (img, 4))
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65 error ("imwrite: matrix for %s must have same dimension as image",
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66 param_list{idx});
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67 endif
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68
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69 case "delaytime"
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70 options.delaytime = param_list{idx+1};
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71 if (! isnumeric (options.delaytime))
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72 error ("imwrite: value for %s option must be numeric",
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73 param_list{idx});
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74 endif
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75 options.delaytime *= 100; # convert to 1/100ths of second
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76 if (isscalar (options.delaytime))
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77 options.delaytime(1:size (img, 4)) = options.delaytime;
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78 elseif (size (img, 4) != numel (options.delaytime))
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79 error ("imwrite: value for %s must either be a scalar or the number of frames",
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80 param_list{idx});
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81 endif
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82 if (any (options.delaytime(:) < 0) || any (options.delaytime(:) > 65535))
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83 error ("imwrite: value for %s must be between 0 and 655.35 seconds",
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84 param_list{idx});
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85 endif
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86
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87 case "loopcount"
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88 options.loopcount = param_list{idx+1};
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89 if (! isscalar (options.loopcount) || ! isnumeric (options.loopcount)
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90 || (! isinf (options.loopcount) && (options.loopcount < 0 ||
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91 options.loopcount > 65535)))
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92 error ("imwrite: value for %s must be Inf or between 0 and 65535",
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93 param_list{idx});
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94 endif
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95 ## Graphics Magick is a bit weird here. A value of 0 will be an
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96 ## infinite loop, a value of 1, will really be no loop, while a
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97 ## value of 2 or more will be that number of loops (checked
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98 ## with GNOME image viewer). This means that there is no way
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99 ## to make it loop only once. See
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100 ## https://sourceforge.net/p/graphicsmagick/bugs/249/
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101 ## There is also the problem of setting this when there is only
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102 ## a single frame. See
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103 ## https://sourceforge.net/p/graphicsmagick/bugs/248/
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104 if (isinf (options.loopcount))
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105 options.loopcount = 0;
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106 elseif (options.loopcount == 0 || options.loopcount == 1)
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107 options.loopcount++;
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108 endif
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109 options.loopcount = floor (options.loopcount);
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110
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111 case "quality",
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112 options.quality = param_list{idx+1};
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113 if (! isnumeric (options.quality) || ! isscalar (options.quality)
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114 || options.quality < 0 || options.quality > 100)
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115 error ("imwrite: value for %s option must be a scalar between 0 and 100",
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116 param_list{idx});
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117 endif
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118 options.quality = round (options.quality);
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119
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120 case "writemode",
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121 options.writemode = param_list{idx+1};
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122 if (! ischar (options.writemode)
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123 || ! any (strcmpi (options.writemode, {"append", "overwrite"})))
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124 error ('imwrite: value for %s option must be "append" or "overwrite"',
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125 param_list{idx});
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126 endif
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127 options.writemode = tolower (options.writemode);
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128
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129 otherwise
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130 error ("imwrite: invalid PARAMETER `%s'", param_list{idx});
16988
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131
54b75bed4bc7 imwrite: implement WriteMode option.
Carnë Draug <carandraug@octave.org>
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132 endswitch
54b75bed4bc7 imwrite: implement WriteMode option.
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133 endfor
54b75bed4bc7 imwrite: implement WriteMode option.
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134
54b75bed4bc7 imwrite: implement WriteMode option.
Carnë Draug <carandraug@octave.org>
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135 if (! isempty (map))
54b75bed4bc7 imwrite: implement WriteMode option.
Carnë Draug <carandraug@octave.org>
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136 if (! iscolormap (map))
54b75bed4bc7 imwrite: implement WriteMode option.
Carnë Draug <carandraug@octave.org>
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137 error ("imwrite: invalid MAP for indexed image");
54b75bed4bc7 imwrite: implement WriteMode option.
Carnë Draug <carandraug@octave.org>
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138 elseif (ndims (img) != 2 && ndims (img) != 4)
54b75bed4bc7 imwrite: implement WriteMode option.
Carnë Draug <carandraug@octave.org>
parents: 16965
diff changeset
139 error ("imwrite: indexed image must have 2 or 4 dimensions (found %i)", ndims (img));
16916
59f575e504dc Connect imwrite with imformats.
Carnë Draug <carandraug@octave.org>
parents:
diff changeset
140 endif
17850
45e325002810 imwrite: fill colormap with black (RGB 0,0,0) for missing colors (bug #33615)
Carnë Draug <carandraug@octave.org>
parents: 17744
diff changeset
141
45e325002810 imwrite: fill colormap with black (RGB 0,0,0) for missing colors (bug #33615)
Carnë Draug <carandraug@octave.org>
parents: 17744
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142 ## Fill in the colormap as required with rgb (0, 0, 0) (bug #33615)
45e325002810 imwrite: fill colormap with black (RGB 0,0,0) for missing colors (bug #33615)
Carnë Draug <carandraug@octave.org>
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143 nColors = rows (map);
45e325002810 imwrite: fill colormap with black (RGB 0,0,0) for missing colors (bug #33615)
Carnë Draug <carandraug@octave.org>
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diff changeset
144 if (any (strcmp (class (img), {"uint8", "uint16", "logical"})))
45e325002810 imwrite: fill colormap with black (RGB 0,0,0) for missing colors (bug #33615)
Carnë Draug <carandraug@octave.org>
parents: 17744
diff changeset
145 required_colors = max (img(:)) +1;
45e325002810 imwrite: fill colormap with black (RGB 0,0,0) for missing colors (bug #33615)
Carnë Draug <carandraug@octave.org>
parents: 17744
diff changeset
146 else
45e325002810 imwrite: fill colormap with black (RGB 0,0,0) for missing colors (bug #33615)
Carnë Draug <carandraug@octave.org>
parents: 17744
diff changeset
147 required_colors = max (img(:));
45e325002810 imwrite: fill colormap with black (RGB 0,0,0) for missing colors (bug #33615)
Carnë Draug <carandraug@octave.org>
parents: 17744
diff changeset
148 endif
45e325002810 imwrite: fill colormap with black (RGB 0,0,0) for missing colors (bug #33615)
Carnë Draug <carandraug@octave.org>
parents: 17744
diff changeset
149 if (nColors < required_colors)
45e325002810 imwrite: fill colormap with black (RGB 0,0,0) for missing colors (bug #33615)
Carnë Draug <carandraug@octave.org>
parents: 17744
diff changeset
150 warning ("imwrite: MAP has not enough colors. Filling with black");
45e325002810 imwrite: fill colormap with black (RGB 0,0,0) for missing colors (bug #33615)
Carnë Draug <carandraug@octave.org>
parents: 17744
diff changeset
151 map(nColors+1:required_colors,:) = 0;
45e325002810 imwrite: fill colormap with black (RGB 0,0,0) for missing colors (bug #33615)
Carnë Draug <carandraug@octave.org>
parents: 17744
diff changeset
152 endif
45e325002810 imwrite: fill colormap with black (RGB 0,0,0) for missing colors (bug #33615)
Carnë Draug <carandraug@octave.org>
parents: 17744
diff changeset
153
17226
46805642048f Implement writing of indexed images.
Carnë Draug <carandraug@octave.org>
parents: 17176
diff changeset
154 ## If the image is floating point, then we convert it to integer (makes
46805642048f Implement writing of indexed images.
Carnë Draug <carandraug@octave.org>
parents: 17176
diff changeset
155 ## it easier in __magick_write__ since it only handles integers. Also,
46805642048f Implement writing of indexed images.
Carnë Draug <carandraug@octave.org>
parents: 17176
diff changeset
156 ## if it's floating point, it has an offset of 1
46805642048f Implement writing of indexed images.
Carnë Draug <carandraug@octave.org>
parents: 17176
diff changeset
157 if (isfloat (img))
46805642048f Implement writing of indexed images.
Carnë Draug <carandraug@octave.org>
parents: 17176
diff changeset
158 if (rows (map) <= 256)
46805642048f Implement writing of indexed images.
Carnë Draug <carandraug@octave.org>
parents: 17176
diff changeset
159 img = uint8 (img - 1);
46805642048f Implement writing of indexed images.
Carnë Draug <carandraug@octave.org>
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diff changeset
160 else
46805642048f Implement writing of indexed images.
Carnë Draug <carandraug@octave.org>
parents: 17176
diff changeset
161 img = uint16 (img - 1);
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Carnë Draug <carandraug@octave.org>
parents: 17176
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162 endif
16916
59f575e504dc Connect imwrite with imformats.
Carnë Draug <carandraug@octave.org>
parents:
diff changeset
163 endif
59f575e504dc Connect imwrite with imformats.
Carnë Draug <carandraug@octave.org>
parents:
diff changeset
164 endif
59f575e504dc Connect imwrite with imformats.
Carnë Draug <carandraug@octave.org>
parents:
diff changeset
165
16988
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Carnë Draug <carandraug@octave.org>
parents: 16965
diff changeset
166 if (ndims (img) > 4)
54b75bed4bc7 imwrite: implement WriteMode option.
Carnë Draug <carandraug@octave.org>
parents: 16965
diff changeset
167 error ("imwrite: invalid %d-dimensional image data", ndims (img));
17226
46805642048f Implement writing of indexed images.
Carnë Draug <carandraug@octave.org>
parents: 17176
diff changeset
168 elseif (all (size (img, 3) != [1 3 4]))
46805642048f Implement writing of indexed images.
Carnë Draug <carandraug@octave.org>
parents: 17176
diff changeset
169 ## 1, 3, or 4 for grayscle, RGB, and CMYK respectively
46805642048f Implement writing of indexed images.
Carnë Draug <carandraug@octave.org>
parents: 17176
diff changeset
170 error ("imwrite: IMG 3rd dimension must be 1, 3, or 4");
16988
54b75bed4bc7 imwrite: implement WriteMode option.
Carnë Draug <carandraug@octave.org>
parents: 16965
diff changeset
171 endif
54b75bed4bc7 imwrite: implement WriteMode option.
Carnë Draug <carandraug@octave.org>
parents: 16965
diff changeset
172
54b75bed4bc7 imwrite: implement WriteMode option.
Carnë Draug <carandraug@octave.org>
parents: 16965
diff changeset
173 __magick_write__ (filename, ext, img, map, options);
54b75bed4bc7 imwrite: implement WriteMode option.
Carnë Draug <carandraug@octave.org>
parents: 16965
diff changeset
174
16916
59f575e504dc Connect imwrite with imformats.
Carnë Draug <carandraug@octave.org>
parents:
diff changeset
175 endfunction
17338
1c89599167a6 maint: End m-files with 1 blank line.
Rik <rik@octave.org>
parents: 17332
diff changeset
176