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annotate scripts/plot/private/__ghostscript__.m @ 11009:064aaf82222f

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Print via a pipeline.
author Ben Abbott <bpabbott@mac.com>
date Tue, 21 Sep 2010 21:22:44 -0400
parents ee9d74048827
children 92bb25c0da9e
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1 ## Copyright (C) 2010 Ben Abbott
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2 ##
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3 ## This program is free software; you can redistribute it and/or modify
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4 ## it under the terms of the GNU General Public License as published by
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5 ## the Free Software Foundation; either version 2 of the License, or
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6 ## (at your option) any later version.
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7 ##
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8 ## This program is distributed in the hope that it will be useful,
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9 ## but WITHOUT ANY WARRANTY; without even the implied warranty of
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10 ## MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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11 ## GNU General Public License for more details.
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12 ##
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13 ## You should have received a copy of the GNU General Public License
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14 ## along with Octave; see the file COPYING. If not, see
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15 ## <http://www.gnu.org/licenses/>.
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16
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17 ## -*- texinfo -*-
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18 ## @deftypefn {Function File} {} __ghostscript__ (@var{@dots{}})
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19 ## Undocumented internal function.
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20 ## @end deftypefn
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21
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22 ## Author: Ben Abbott <bpabbott@mac.com>
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23 ## Created: 2010-07-26
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24
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25 function [gs_cmd, cleanup_cmd] = __ghostscript__ (varargin);
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26
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27 opts.binary = "";
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28 opts.source = "-";
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29 opts.output = "-";
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30 opts.device = "";
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31 opts.epscrop = false;
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32 opts.antialiasing = false;
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33 opts.resolution = 150;
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34 opts.papersize = "";
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35 opts.pageoffset = [0 0];
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36 opts.debug = false;
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37 opts.level = [];
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38 opts.prepend = "";
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39
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40 offsetfile = "";
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41 offset_ps = {};
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42 cleanup_cmd = "";
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43
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44 args = varargin;
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45 n = find (cellfun (@isstruct, args));
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46 if (! isempty (n))
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47 f = fieldnames (args{n});
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48 for m = 1:numel(f)
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49 opts.(f{m}) = args{n}.(f{m});
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50 endfor
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51 args(n) = [];
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52 endif
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53 for n = 1:2:numel(args)
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54 opts.(args{n}) = args{n+1};
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55 endfor
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56
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57 if (isempty (opts.papersize))
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58 format_for_printer = false;
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59 else
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60 format_for_printer = true;
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61 endif
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62
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63 gs_opts = sprintf ("-dQUIET -dNOPAUSE -dBATCH -dSAFER -sDEVICE=%s", opts.device);
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64
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65 if (! isempty (opts.level) && ismember (opts.level, [1, 2, 3]))
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66 gs_opts = sprintf ("%s -dLanguageLevel=%d", gs_opts, round (opts.level));
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67 endif
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68
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69 if (opts.antialiasing && isempty (strfind (opts.device, "write")))
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70 ## Apply anti-aliasing to all bitmap formats/devices
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71 gs_opts = sprintf ("%s -dTextAlphaBits=4 -dGraphicsAlphaBits=4", gs_opts);
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72 gs_opts = sprintf ("%s -r%dx%d", gs_opts, [1, 1] * opts.resolution);
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73 elseif (any (strcmp (opts.device, {"pswrite", "ps2write", "pdfwrite"})))
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74 gs_opts = sprintf ("%s -dEmbedAllFonts=true", gs_opts);
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75 if (strcmp (opts.device, "pdfwrite"))
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76 ## Optimize for loading
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77 gs_opts = sprintf ("%s -dOptimize=true", gs_opts);
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78 endif
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79 endif
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80
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81 if (opts.epscrop)
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82 ## papersize is specified by the eps bbox
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83 gs_opts = sprintf ("%s -dEPSCrop", gs_opts);
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84 endif
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85 if (format_for_printer)
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86 if (ischar (opts.papersize))
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87 gs_opts = sprintf ("%s -sPAPERSIZE=%s", gs_opts, opts.papersize);
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88 elseif (isnumeric (opts.papersize) && numel (opts.papersize) == 2)
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89 gs_opts = sprintf ("%s -dDEVICEWIDTHPOINTS=%d -dDEVICEHEIGHTPOINTS=%d",
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90 gs_opts, opts.papersize);
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91 if (opts.papersize(1) > opts.papersize(2))
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92 ## Lanscape mode: This option will result in automatic rotation of the
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93 ## document page if the requested page size matches one
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94 ## of the default page sizes
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95 gs_opts = sprintf ("%s -dNORANGEPAGESIZE", gs_opts);
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96 endif
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97 else
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98 error ("print:badpapersize", "__ghostscript__.m: invalid 'papersize'")
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99 endif
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100 gs_opts = sprintf ("%s -dFIXEDMEDIA", gs_opts);
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101 ## "pageoffset" is relative to the coordinates, not the BBox LLHC.
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102 str = sprintf ("%s [%d %d] %s", "<< /Margins [0 0] /.HWMargins [0 0 0 0] /PageOffset",
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103 opts.pageoffset, ">> setpagedevice");
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104 offset_ps = {"%!PS-Adobe-3.0", str, "%%EOF"};
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105 if (isfield (opts, "offsetfile"))
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106 offsetfile = opts.offsetfile;
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107 cleanup_cmd = "";
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108 else
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109 offsetfile = strcat (tmpnam (), ".ps");
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110 cleanup_cmd = sprintf ("rm %s", offsetfile);
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111 endif
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112 unwind_protect
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113 fid = fopen (offsetfile, "w");
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114 if (fid == -1)
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115 error ("print:fopenfailed", "__ghostscript__.m: fopen() failed.");
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116 endif
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117 fprintf (fid, "%s\n", offset_ps{:})
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118 unwind_protect_cleanup
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119 status = fclose (fid);
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120 if (status == -1)
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121 error ("print:fclosefailed", "__ghostscript__.m: fclose() failed.");
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122 endif
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123 end_unwind_protect
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124 if (opts.debug)
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125 fprintf ("---- begin %s ----\n", offsetfile)
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126 fprintf ("%s\n", offset_ps{:})
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127 fprintf ("----- end %s -----\n", offsetfile)
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128 endif
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129 endif
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130
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131 if (isempty (opts.output))
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132 cmd = sprintf ("%s %s", opts.binary, gs_opts);
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133 else
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134 cmd = sprintf ("%s %s -sOutputFile=%s", opts.binary, gs_opts, opts.output);
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135 endif
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136 if (! isempty (opts.prepend)
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137 && any (strcmpi (opts.device, {"pswrite", "ps2write", "pdfwrite"})))
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138 ## FIXME - Fonts get may be mangled when appending ps/ps2.
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139 ## See "How to concatenate several PS files" at the link,
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140 ## http://en.wikibooks.org/wiki/PostScript_FAQ
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141 cmd = sprintf ("%s %s", cmd, opts.prepend);
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142 endif
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143 if (! isempty (offsetfile) && format_for_printer)
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144 cmd = sprintf ("%s %s", cmd, offsetfile);
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145 endif
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146 if (! isempty (opts.source))
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147 cmd = sprintf ("%s %s", cmd, opts.source);
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148 endif
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149
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150 if (opts.debug)
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151 fprintf ("Ghostscript command: '%s'\n", cmd);
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152 endif
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153
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154 gs_cmd = cmd;
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155
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156 endfunction
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157
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158