1 | ###########################################################################
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2 | #
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3 | # ImagePlug.pm -- simple text plugin
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4 | # A component of the Greenstone digital library software
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5 | # from the New Zealand Digital Library Project at the
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6 | # University of Waikato, New Zealand.
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7 | #
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8 | # Copyright (C) 1999 New Zealand Digital Library Project
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9 | #
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10 | # This program is free software; you can redistribute it and/or modify
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11 | # it under the terms of the GNU General Public License as published by
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12 | # the Free Software Foundation; either version 2 of the License, or
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13 | # (at your option) any later version.
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14 | #
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15 | # This program is distributed in the hope that it will be useful,
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16 | # but WITHOUT ANY WARRANTY; without even the implied warranty of
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17 | # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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18 | # GNU General Public License for more details.
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19 | #
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20 | # You should have received a copy of the GNU General Public License
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21 | # along with this program; if not, write to the Free Software
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22 | # Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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23 | #
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24 | ###########################################################################
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25 |
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26 | package ImagePlug;
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27 |
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28 | use BasPlug;
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29 |
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30 | sub BEGIN {
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31 | @ISA = ('BasPlug');
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32 | }
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33 |
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34 | my $arguments =
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35 | [ { 'name' => "process_exp",
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36 | 'desc' => "{BasPlug.process_exp}",
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37 | 'type' => "regexp",
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38 | 'deft' => &get_default_process_exp(),
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39 | 'reqd' => "no" },
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40 | { 'name' => "noscaleup",
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41 | 'desc' => "{ImagePlug.noscaleup}",
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42 | 'type' => "flag",
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43 | 'reqd' => "no" },
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44 | { 'name' => "thumbnailsize",
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45 | 'desc' => "{ImagePlug.thumbnailsize}",
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46 | 'type' => "int",
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47 | 'deft' => "100",
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48 | 'reqd' => "no" },
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49 | { 'name' => "thumbnailtype",
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50 | 'desc' => "{ImagePlug.thumbnailtype}",
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51 | 'type' => "string",
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52 | 'deft' => "gif",
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53 | 'reqd' => "no" },
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54 | { 'name' => "screenviewsize",
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55 | 'desc' => "{ImagePlug.screenviewsize}",
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56 | 'type' => "int",
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57 | 'deft' => "0",
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58 | 'reqd' => "no" },
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59 | { 'name' => "screenviewtype",
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60 | 'desc' => "{ImagePlug.screenviewtype}",
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61 | 'type' => "string",
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62 | 'deft' => "jpg",
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63 | 'reqd' => "no" },
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64 | { 'name' => "converttotype",
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65 | 'desc' => "{ImagePlug.converttotype}",
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66 | 'type' => "string",
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67 | 'deft' => "",
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68 | 'reqd' => "no" },
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69 | { 'name' => "minimumsize",
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70 | 'desc' => "{ImagePlug.minimumsize}",
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71 | 'type' => "int",
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72 | 'deft' => "100",
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73 | 'reqd' => "no" } ];
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74 |
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75 | my $options = { 'name' => "ImagePlug",
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76 | 'desc' => "{ImagePlug.desc}",
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77 | 'abstract' => "no",
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78 | 'inherits' => "yes",
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79 | 'args' => $arguments };
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80 |
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81 |
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82 |
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83 | sub new {
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84 | my ($class) = @_;
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85 | my $plugin_name = shift (@_);
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86 | my $self = new BasPlug ("ImagePlug", @_);
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87 | $self->{'plugin_type'} = "ImagePlug";
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88 | # 14-05-02 To allow for proper inheritance of arguments - John Thompson
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89 | my $option_list = $self->{'option_list'};
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90 | push( @{$option_list}, $options );
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91 |
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92 | if (!parsargv::parse(\@_,
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93 | q^noscaleup^, \$self->{'noscaleup'},
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94 | q^converttotype/.*/^, \$self->{'converttotype'},
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95 | q^minimumsize/[0-9]*/100^, \$self->{'minimumsize'},
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96 |
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97 | q^thumbnailsize/[0-9]*/100^, \$self->{'thumbnailsize'},
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98 | q^thumbnailtype/.*/gif^, \$self->{'thumbnailtype'},
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99 | q^screenviewsize/[0-9]*/0^, \$self->{'screenviewsize'},
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100 | q^screenviewtype/.*/jpg^, \$self->{'screenviewtype'},
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101 | "allow_extra_options")) {
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102 |
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103 | print STDERR "\nImagePlug uses an incorrect option.\n";
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104 | print STDERR "Check your collect.cfg configuration file.\n";
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105 | $self->print_txt_usage(""); # Use default resource bundle
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106 | die "\n";
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107 | }
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108 |
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109 | # Check that ImageMagick is installed and available on the path (except for Windows 95/98)
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110 | if (!($ENV{'GSDLOS'} eq "windows" && !Win32::IsWinNT())) {
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111 | my $result = `identify 2>&1`;
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112 | if ($? == -1 || $? == 256) { # Linux and Windows return different values for "program not found"
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113 | $self->{'imagemagick_not_installed'} = 1;
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114 | }
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115 | }
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116 |
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117 | return bless $self, $class;
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118 | }
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119 |
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120 | sub get_default_process_exp {
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121 | my $self = shift (@_);
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122 |
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123 | return q^(?i)(\.jpe?g|\.gif|\.png|\.bmp|\.xbm|\.tif?f)$^;
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124 | }
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125 |
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126 | # this makes no sense for images
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127 | sub block_cover_image
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128 | {
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129 | my $self =shift (@_);
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130 | my ($filename) = @_;
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131 |
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132 | return;
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133 | }
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134 | # Create the thumbnail and screenview images, and discover the Image's
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135 | # size, width, and height using the convert utility.
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136 |
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137 | sub run_convert {
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138 | my $self = shift (@_);
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139 | my $filename = shift (@_); # filename with full path
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140 | my $file = shift (@_); # filename without path
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141 | my $doc_obj = shift (@_);
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142 | my $section = $doc_obj->get_top_section();
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143 |
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144 | my $verbosity = $self->{'verbosity'};
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145 | my $outhandle = $self->{'outhandle'};
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146 |
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147 | # check the filename is okay
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148 | return 0 if ($file eq "" || $filename eq "");
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149 |
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150 | # Code now extended to quote filenames in 'convert' commnads
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151 | # Allows spaces in filenames, but note needs spaces to be escaped in URL as well
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152 | # if ($filename =~ m/ /) {
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153 | # print $outhandle "ImagePlug: \"$filename\" contains a space. choking.\n";
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154 | # return undef;
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155 | # }
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156 |
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157 | my $minimumsize = $self->{'minimumsize'};
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158 | if (defined $minimumsize && (-s $filename < $minimumsize)) {
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159 | print $outhandle "ImagePlug: \"$filename\" too small, skipping\n"
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160 | if ($verbosity > 1);
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161 | }
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162 |
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163 |
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164 | # Convert the image to a new type (if required).
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165 | my $converttotype = $self->{'converttotype'};
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166 | my $originalfilename = ""; # only set if we do a conversion
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167 | my $type = "unknown";
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168 |
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169 |
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170 | if ($converttotype ne "" && $filename =~ m/$converttotype$/) {
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171 |
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172 | $originalfilename = $filename;
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173 | $filename = &util::get_tmp_filename() . ".$converttotype";
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174 | $self->{'tmp_filename'} = $filename;
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175 |
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176 | my $command = "convert -interlace plane -verbose \"$originalfilename\" \"$filename\"";
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177 | print $outhandle "$command\n" if ($verbosity > 2);
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178 | my $result = '';
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179 | $result = `$command`;
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180 | print $outhandle "RESULT = $result\n" if ($verbosity > 2);
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181 |
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182 | $type = $converttotype;
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183 | }
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184 |
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185 |
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186 | # Add the image metadata
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187 | my $url = $file;
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188 | $url =~ s/ /%20/g;
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189 |
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190 | $doc_obj->add_metadata ($section, "Image", $url);
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191 |
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192 | # Also want to set filename as 'Source' metadata to be
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193 | # consistent with other plugins
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194 | $doc_obj->add_metadata ($section, "Source", $url);
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195 |
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196 | my ($image_type, $image_width, $image_height, $image_size)
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197 | = &identify($filename, $outhandle, $verbosity);
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198 |
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199 | if ($image_type ne " ") {
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200 | $type = $image_type;
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201 | }
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202 |
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203 | $doc_obj->add_metadata ($section, "FileFormat", $type);
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204 | $doc_obj->add_metadata ($section, "FileSize", $image_size);
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205 |
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206 | $doc_obj->add_metadata ($section, "ImageType", $image_type);
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207 | $doc_obj->add_metadata ($section, "ImageWidth", $image_width);
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208 | $doc_obj->add_metadata ($section, "ImageHeight", $image_height);
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209 | $doc_obj->add_metadata ($section, "ImageSize", $image_size);
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210 |
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211 | $doc_obj->add_metadata ($section, "srclink",
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212 | "<a href=\"_httpcollection_/index/assoc/[assocfilepath]/[Image]\">");
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213 | $doc_obj->add_metadata ($section, "/srclink", "</a>");
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214 |
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215 | $doc_obj->add_metadata ($section, "srcicon", "<img src=\"_httpcollection_/index/assoc/[assocfilepath]/[Image]\" width=100>");
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216 |
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217 |
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218 | # Add the image as an associated file
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219 | $doc_obj->associate_file($filename,$file,"image/$type",$section);
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220 |
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221 |
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222 | # Make the thumbnail image
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223 | my $thumbnailsize = $self->{'thumbnailsize'} || 100;
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224 | my $thumbnailtype = $self->{'thumbnailtype'} || 'gif';
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225 |
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226 | my $thumbnailfile = &util::get_tmp_filename() . ".$thumbnailtype";
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227 | $self->{'tmp_filename2'} = $thumbnailfile;
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228 |
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229 | # Generate the thumbnail with convert
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230 | my $command = "convert -interlace plane -verbose -geometry $thumbnailsize"
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231 | . "x$thumbnailsize \"$filename\" \"$thumbnailfile\"";
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232 | print $outhandle "THUMBNAIL: $command\n" if ($verbosity > 2);
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233 | my $result = '';
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234 | $result = `$command 2>&1` ;
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235 | print $outhandle "THUMB RESULT: $result\n" if ($verbosity > 2);
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236 |
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237 | # Add the thumbnail as an associated file ...
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238 | if (-e "$thumbnailfile") {
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239 | $doc_obj->associate_file("$thumbnailfile", "thumbnail.$thumbnailtype",
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240 | "image/$thumbnailtype",$section);
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241 | $doc_obj->add_metadata ($section, "ThumbType", $thumbnailtype);
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242 | $doc_obj->add_metadata ($section, "Thumb", "thumbnail.$thumbnailtype");
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243 |
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244 | $doc_obj->add_metadata ($section, "thumbicon", "<img src=\"_httpcollection_/index/assoc/[assocfilepath]/[Thumb]\" width=[ThumbWidth] height=[ThumbHeight]>");
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245 | }
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246 |
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247 | # Extract Thumnail metadata from convert output
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248 | if ($result =~ m/[0-9]+x[0-9]+=>([0-9]+)x([0-9]+)/) {
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249 | $doc_obj->add_metadata ($section, "ThumbWidth", $1);
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250 | $doc_obj->add_metadata ($section, "ThumbHeight", $2);
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251 | }
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252 |
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253 | # Make a screen-sized version of the picture if requested
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254 | if ($self->{'screenviewsize'}) {
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255 |
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256 | # To do: if the actual image smaller than the screenview size,
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257 | # we should use the original !
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258 |
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259 | my $screenviewsize = $self->{'screenviewsize'};
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260 | my $screenviewtype = $self->{'screenviewtype'} || 'jpeg';
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261 | my $screenviewfilename = &util::get_tmp_filename() . ".$screenviewtype";
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262 | $self->{'tmp_filename3'} = $screenviewfilename;
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263 |
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264 | # make the screenview image
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265 | my $command = "convert -interlace plane -verbose -geometry $screenviewsize"
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266 | . "x$screenviewsize \"$filename\" \"$screenviewfilename\"";
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267 | print $outhandle "$command\n" if ($verbosity > 2);
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268 | my $result = "";
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269 | $result = `$command 2>&1` ;
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270 | print $outhandle "$result\n" if ($verbosity > 3);
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271 |
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272 | # get screenview dimensions, size and type
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273 | if ($result =~ m/[0-9]+x[0-9]+=>([0-9]+)x([0-9]+)/) {
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274 | $doc_obj->add_metadata ($section, "ScreenWidth", $1);
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275 | $doc_obj->add_metadata ($section, "ScreenHeight", $2);
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276 | }
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277 | else {
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278 | $doc_obj->add_metadata ($section, "ScreenWidth", $image_width);
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279 | $doc_obj->add_metadata ($section, "ScreenHeight", $image_height);
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280 | }
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281 |
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282 | #add the screenview as an associated file ...
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283 | if (-e "$screenviewfilename") {
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284 | $doc_obj->associate_file("$screenviewfilename", "screenview.$screenviewtype",
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285 | "image/$screenviewtype",$section);
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286 | $doc_obj->add_metadata ($section, "ScreenType", $screenviewtype);
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287 | $doc_obj->add_metadata ($section, "Screen", "screenview.$screenviewtype");
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288 |
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289 | $doc_obj->add_metadata ($section, "screenicon", "<img src=\"_httpcollection_/index/assoc/[assocfilepath]/[Screen]\" width=[ScreenWidth] height=[ScreenHeight]>");
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290 | } else {
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291 | print $outhandle "ImagePlug: couldn't find \"$screenviewfilename\"\n";
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292 | }
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293 | }
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294 |
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295 | return $type;
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296 |
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297 |
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298 | }
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299 |
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300 |
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301 |
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302 | # Discover the characteristics of an image file with the ImageMagick
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303 | # "identify" command.
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304 |
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305 | sub identify {
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306 | my ($image, $outhandle, $verbosity) = @_;
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307 |
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308 | # Use the ImageMagick "identify" command to get the file specs
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309 | my $command = "identify \"$image\" 2>&1";
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310 | print $outhandle "$command\n" if ($verbosity > 2);
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311 | my $result = '';
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312 | $result = `$command`;
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313 | print $outhandle "$result\n" if ($verbosity > 3);
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314 |
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315 | # Read the type, width, and height
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316 | my $type = 'unknown';
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317 | my $width = 'unknown';
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318 | my $height = 'unknown';
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319 |
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320 | my $image_safe = quotemeta $image;
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321 | if ($result =~ /^$image_safe (\w+) (\d+)x(\d+)/) {
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322 | $type = $1;
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323 | $width = $2;
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324 | $height = $3;
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325 | }
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326 |
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327 | # Read the size
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328 | my $size = "unknown";
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329 | if ($result =~ m/^.* ([0-9]+)b/) {
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330 | $size = $1;
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331 | }
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332 | elsif ($result =~ m/^.* ([0-9]+)(\.([0-9]+))?kb?/) {
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333 | $size = 1024 * $1;
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334 | if (defined($2)) {
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335 | $size = $size + (1024 * $2);
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336 | # Truncate size (it isn't going to be very accurate anyway)
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337 | $size = int($size);
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338 | }
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339 | }
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340 |
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341 | print $outhandle "file: $image:\t $type, $width, $height, $size\n"
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342 | if ($verbosity > 2);
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343 |
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344 | # Return the specs
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345 | return ($type, $width, $height, $size);
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346 | }
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347 |
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348 |
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349 | # The ImagePlug read() function. This function does all the right things
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350 | # to make general options work for a given plugin. It calls the process()
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351 | # function which does all the work specific to a plugin (like the old
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352 | # read functions used to do). Most plugins should define their own
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353 | # process() function and let this read() function keep control.
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354 | #
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355 | # ImagePlug overrides read() because there is no need to read the actual
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356 | # text of the file in, because the contents of the file is not text...
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357 | #
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358 | # Return number of files processed, undef if can't process
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359 | # Note that $base_dir might be "" and that $file might
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360 | # include directories
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361 |
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362 | sub read {
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363 | my $self = shift (@_);
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364 | my ($pluginfo, $base_dir, $file, $metadata, $processor, $maxdocs, $total_count, $gli) = @_;
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365 |
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366 | my $outhandle = $self->{'outhandle'};
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367 |
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368 | my $filename = &util::filename_cat($base_dir, $file);
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369 | return 0 if $self->{'block_exp'} ne "" && $filename =~ /$self->{'block_exp'}/;
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370 | if ($filename !~ /$self->{'process_exp'}/ || !-f $filename) {
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371 | return undef;
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372 | }
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373 |
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374 | print STDERR "<Processing n='$file' p='ImagePlug'>\n" if ($gli);
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375 | print $outhandle "ImagePlug processing $file\n"
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376 | if $self->{'verbosity'} > 1;
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377 |
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378 | # None of this works very well on Windows 95/98...
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379 | if ($ENV{'GSDLOS'} eq "windows" && !Win32::IsWinNT()) {
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380 | if ($gli) {
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381 | print STDERR "<ProcessingError n='$file' r='Windows 95/98 not supported'>\n";
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382 | }
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383 | print $outhandle "ImagePlug: Windows 95/98 not supported\n";
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384 | return -1;
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385 | }
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386 |
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387 | # None of this is going to work very well without ImageMagick...
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388 | if ($self->{'imagemagick_not_installed'}) {
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389 | if ($gli) {
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390 | print STDERR "<ProcessingError n='$file' r='ImageMagick not installed'>\n";
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391 | }
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392 | print $outhandle "ImagePlug: ImageMagick not installed\n";
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393 | return -1;
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394 | }
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395 |
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396 | #if there's a leading directory name, eat it...
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397 | $file =~ s/^.*[\/\\]//;
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398 |
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399 | # create a new document
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400 | my $doc_obj = new doc ($filename, "indexed_doc");
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401 | $doc_obj->set_OIDtype ($processor->{'OIDtype'});
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402 | $doc_obj->add_utf8_metadata($doc_obj->get_top_section(), "Plugin", "$self->{'plugin_type'}");
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403 |
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404 | #run convert to get the thumbnail and extract size and type info
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405 | my $result = run_convert($self, $filename, $file, $doc_obj);
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406 |
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407 | if (!defined $result)
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408 | {
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409 | if ($gli) {
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410 | print STDERR "<ProcessingError n='$file'>\n";
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411 | }
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412 | print $outhandle "ImagePlug: couldn't process \"$filename\"\n";
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413 | return -1; # error during processing
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414 | }
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415 |
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416 | #create an empty text string so we don't break downstream plugins
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417 | my $text = &gsprintf::lookup_string("{BasPlug.dummy_text}");
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418 | # include any metadata passed in from previous plugins
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419 | # note that this metadata is associated with the top level section
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420 | my $section = $doc_obj->get_top_section();
|
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421 | $self->extra_metadata ($doc_obj, $section, $metadata);
|
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422 |
|
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423 | # do plugin specific processing of doc_obj
|
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424 | unless (defined ($self->process(\$text, $pluginfo, $base_dir, $file, $metadata, $doc_obj))) {
|
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425 | print STDERR "<ProcessingError n='$file'>\n" if ($gli);
|
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426 | return -1;
|
---|
427 | }
|
---|
428 |
|
---|
429 | # do any automatic metadata extraction
|
---|
430 | $self->auto_extract_metadata ($doc_obj);
|
---|
431 |
|
---|
432 | # if we haven't found any Title so far, assign one
|
---|
433 | # this was shifted to here from inside read()
|
---|
434 | $self->title_fallback($doc_obj,$section,$file);
|
---|
435 | # add an OID
|
---|
436 | $doc_obj->set_OID();
|
---|
437 | $doc_obj->add_text($section, $text);
|
---|
438 |
|
---|
439 | # process the document
|
---|
440 | $processor->process($doc_obj);
|
---|
441 |
|
---|
442 | # clean up temporary files - we do this here instead of in
|
---|
443 | # run_convert becuase associated files aren't actually copied
|
---|
444 | # until after process has been run.
|
---|
445 | if (defined $self->{'tmp_filename'} &&
|
---|
446 | -e $self->{'tmp_filename'}) {
|
---|
447 | &util::rm($self->{'tmp_filename'})
|
---|
448 | }
|
---|
449 | if (defined $self->{'tmp_filename2'} &&
|
---|
450 | -e $self->{'tmp_filename2'}) {
|
---|
451 | &util::rm($self->{'tmp_filename2'})
|
---|
452 | }
|
---|
453 | if (defined $self->{'tmp_filename3'} &&
|
---|
454 | -e $self->{'tmp_filename3'}) {
|
---|
455 | &util::rm($self->{'tmp_filename3'})
|
---|
456 | }
|
---|
457 |
|
---|
458 | $self->{'num_processed'}++;
|
---|
459 |
|
---|
460 | return 1;
|
---|
461 | }
|
---|
462 |
|
---|
463 | # do plugin specific processing of doc_obj
|
---|
464 | sub process {
|
---|
465 | my $self = shift (@_);
|
---|
466 | my ($textref, $pluginfo, $base_dir, $file, $metadata, $doc_obj) = @_;
|
---|
467 | my $outhandle = $self->{'outhandle'};
|
---|
468 |
|
---|
469 | return 1;
|
---|
470 | }
|
---|
471 |
|
---|
472 | 1;
|
---|
473 |
|
---|
474 |
|
---|
475 |
|
---|
476 |
|
---|
477 |
|
---|
478 |
|
---|
479 |
|
---|
480 |
|
---|
481 |
|
---|
482 |
|
---|
483 |
|
---|