| 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 |
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| 35 | my $arguments = [ { 'name' => "process_exp",
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| 36 | 'desc' => "A perl regular expression to match against filenames. Matching filenames will be processed by this plugin. Each plugin has its own default process_exp. e.g HTMLPlug defaults to '(?i)\.html?\$' i.e. all documents ending in .htm or .html (case-insensitive).",
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| 37 | 'type' => "string",
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| 38 | 'deft' => q^(?i)(\.jpe?g|\.gif|\.png|\.bmp|\.xbm|\.tif?f)$^,
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| 39 | 'reqd' => "no" },
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| 40 | { 'name' => "noscaleup",
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| 41 | 'desc' => "Don't scale up small images when making thumbnails.",
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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' => "Make thumbnails of size nxn.",
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| 46 | 'type' => "int",
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| 47 | 'reqd' => "no" },
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| 48 | { 'name' => "thumbnailtype",
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| 49 | 'desc' => "Make thumbnails in format 's'.",
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| 50 | 'type' => "string",
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| 51 | 'reqd' => "no" },
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| 52 | { 'name' => "screenviewsize",
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| 53 | 'desc' => "If set, makes an image of size n for screen display and sets Screen, ScreenSize, ScreenWidth and ScreenHeight metadata. By default it is not set.",
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| 54 | 'type' => "int",
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| 55 | 'reqd' => "no" },
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| 56 | { 'name' => "screenviewtype",
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| 57 | 'desc' => "If -screenviewsize is set, this sets the screen display image type. Defaults to jpg.",
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| 58 | 'type' => "string",
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| 59 | 'deft' => "jpg",
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| 60 | 'reqd' => "no" },
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| 61 | { 'name' => "convertto",
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| 62 | 'desc' => "Convert main image to.",
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| 63 | 'type' => "string",
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| 64 | 'reqd' => "no" },
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| 65 | { 'name' => "minimumsize",
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| 66 | 'desc' => "Ignore images smaller than n bytes.",
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| 67 | 'type' => "int",
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| 68 | 'reqd' => "no" } ];
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| 69 |
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| 70 | my $options = { 'name' => "ImagePlug",
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| 71 | 'desc' => "",
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| 72 | 'inherits' => "yes",
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| 73 | 'args' => $arguments };
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| 74 |
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| 75 |
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| 76 | sub print_usage {
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| 77 | my ($plugin_name) = @_;
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| 78 |
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| 79 | print STDERR "
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| 80 | usage: plugin ImagePlug [options]
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| 81 |
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| 82 | -noscaleup Don't scale up small images when making thumbnails
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| 83 |
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| 84 | -thumbnailsize n Make thumbnails of size nxn
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| 85 |
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| 86 | -thumbnailtype s Make thumbnails in format 's'
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| 87 |
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| 88 | -screenviewsize n If set, makes an image of size n for screen display
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| 89 | and sets Screen, ScreenSize, ScrrenWidth and Screeneight
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| 90 | metadata. By default it is not set.
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| 91 |
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| 92 | -screenviewtype s If -screenviewsize is set, this sets the screen display
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| 93 | image type. Defaults to jpg.
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| 94 |
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| 95 | -convertto s Convert main inage to (gif|png|jpg)
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| 96 |
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| 97 | -minimumsize n Ignore images smaller than n bytes
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| 98 |
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| 99 | "
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| 100 | }
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| 101 |
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| 102 |
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| 103 | sub new {
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| 104 | my ($class) = @_;
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| 105 | my $plugin_name = shift (@_);
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| 106 | my $self = new BasPlug ("ImagePlug", @_);
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| 107 |
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| 108 | # 14-05-02 To allow for proper inheritance of arguments - John Thompson
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| 109 | my $option_list = $self->{'option_list'};
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| 110 | push( @{$option_list}, $options );
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| 111 |
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| 112 | if (!parsargv::parse(\@_,
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| 113 | q^noscaleup^, \$self->{'noscaleup'},
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| 114 | q^converttotype/.*/^, \$self->{'converttotype'},
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| 115 | q^minimumsize/[0-9]*/100^, \$self->{'minimumsize'},
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| 116 |
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| 117 | q^thumbnailsize/[0-9]*/100^, \$self->{'thumbnailsize'},
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| 118 | q^thumbnailtype/.*/gif^, \$self->{'thumbnailtype'},
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| 119 | q^screenviewsize/[0-9]*/0^, \$self->{'screenviewsize'},
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| 120 | q^screenviewtype/.*/jpg^, \$self->{'screenviewtype'},
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| 121 | "allow_extra_options")) {
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| 122 |
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| 123 | print STDERR "\nImagePlug uses an incorrect option.\n";
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| 124 | print STDERR "Check your collect.cfg configuration file.\n";
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| 125 | &print_usage($plugin_name);
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| 126 | die "\n";
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| 127 | }
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| 128 |
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| 129 | return bless $self, $class;
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| 130 | }
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| 131 |
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| 132 |
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| 133 | sub get_default_process_exp {
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| 134 | my $self = shift (@_);
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| 135 |
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| 136 | return q^(?i)(\.jpe?g|\.gif|\.png|\.bmp|\.xbm|\.tif?f)$^;
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| 137 | }
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| 138 |
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| 139 |
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| 140 | # Create the thumbnail and screenview images, and discover the Image's
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| 141 | # size, width, and height using the convert utility.
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| 142 |
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| 143 | sub run_convert {
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| 144 | my $self = shift (@_);
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| 145 | my $filename = shift (@_); # filename with full path
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| 146 | my $file = shift (@_); # filename without path
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| 147 | my $doc_obj = shift (@_);
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| 148 | my $section = $doc_obj->get_top_section();
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| 149 |
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| 150 | my $verbosity = $self->{'verbosity'};
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| 151 | my $outhandle = $self->{'outhandle'};
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| 152 |
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| 153 | # check the filename is okay
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| 154 | return 0 if ($file eq "" || $filename eq "");
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| 155 |
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| 156 | # Code now extended to quote filenames in 'convert' commnads
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| 157 | # Allows spaces in filenames, but note needs spaces to be escaped in URL as well
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| 158 | # if ($filename =~ m/ /) {
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| 159 | # print $outhandle "ImagePlug: \"$filename\" contains a space. choking.\n";
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| 160 | # return undef;
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| 161 | # }
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| 162 |
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| 163 | my $minimumsize = $self->{'minimumsize'};
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| 164 | if (defined $minimumsize && (-s $filename < $minimumsize)) {
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| 165 | print $outhandle "ImagePlug: \"$filename\" too small, skipping\n"
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| 166 | if ($verbosity > 1);
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| 167 | }
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| 168 |
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| 169 | # Convert the image to a new type (if required).
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| 170 | my $converttotype = $self->{'converttotype'};
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| 171 | my $originalfilename = ""; # only set if we do a conversion
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| 172 | my $type = "unknown";
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| 173 |
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| 174 | if ($converttotype ne "" && $filename =~ m/$converttotype$/) {
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| 175 |
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| 176 | $originalfilename = $filename;
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| 177 | $filename = &util::get_tmp_filename() . ".$converttotype";
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| 178 | $self->{'tmp_filename'} = $filename;
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| 179 |
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| 180 | my $command = "convert -interlace plane -verbose \"$originalfilename\" \"$filename\"";
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| 181 | print $outhandle "$command\n" if ($verbosity > 2);
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| 182 | my $result = '';
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| 183 | $result = `$command`;
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| 184 | print $outhandle "$result\n" if ($verbosity > 3);
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| 185 |
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| 186 | $type = $converttotype;
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| 187 | }
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| 188 |
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| 189 | # Add the image metadata
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| 190 | my $url = $file;
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| 191 | $url =~ s/ /%20/g;
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| 192 |
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| 193 | $doc_obj->add_metadata ($section, "Image", $url);
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| 194 |
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| 195 | # Also want to set filename as 'Source' metadata to be
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| 196 | # consistent with other plugins
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| 197 | $doc_obj->add_metadata ($section, "Source", $url);
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| 198 |
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| 199 | my ($image_type, $image_width, $image_height, $image_size)
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| 200 | = &identify($filename, $outhandle, $verbosity);
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| 201 |
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| 202 | $doc_obj->add_metadata ($section, "ImageType", $image_type);
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| 203 | $doc_obj->add_metadata ($section, "ImageWidth", $image_width);
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| 204 | $doc_obj->add_metadata ($section, "ImageHeight", $image_height);
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| 205 | $doc_obj->add_metadata ($section, "ImageSize", $image_size);
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| 206 |
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| 207 | # Add the image as an associated file
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| 208 | $doc_obj->associate_file($filename,$file,"image/$type",$section);
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| 209 |
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| 210 | # Make the thumbnail image
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| 211 | my $thumbnailsize = $self->{'thumbnailsize'} || 100;
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| 212 | my $thumbnailtype = $self->{'thumbnailtype'} || 'gif';
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| 213 | my $thumbnailfile = &util::get_tmp_filename() . ".$thumbnailtype";
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| 214 | $self->{'tmp_filename2'} = $thumbnailfile;
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| 215 |
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| 216 | # Generate the thumbnail with convert
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| 217 | my $command = "convert -interlace plane -verbose -geometry $thumbnailsize"
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| 218 | . "x$thumbnailsize \"$filename\" \"$thumbnailfile\"";
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| 219 | print $outhandle "$command\n" if ($verbosity > 2);
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| 220 | my $result = '';
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| 221 | $result = `$command 2>&1` ;
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| 222 | print $outhandle "$result\n" if ($verbosity > 3);
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| 223 |
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| 224 | # Add the thumbnail as an associated file ...
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| 225 | if (-e "$thumbnailfile") {
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| 226 | $doc_obj->associate_file("$thumbnailfile", "thumbnail.$thumbnailtype",
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| 227 | "image/$thumbnailtype",$section);
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| 228 | $doc_obj->add_metadata ($section, "ThumbType", $thumbnailtype);
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| 229 | $doc_obj->add_metadata ($section, "Thumb", "thumbnail.$thumbnailtype");
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| 230 | }
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| 231 |
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| 232 | # Extract Thumnail metadata from convert output
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| 233 | if ($result =~ m/[0-9]+x[0-9]+=>([0-9]+)x([0-9]+)/) {
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| 234 | $doc_obj->add_metadata ($section, "ThumbWidth", $1);
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| 235 | $doc_obj->add_metadata ($section, "ThumbHeight", $2);
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| 236 | }
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| 237 |
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| 238 | # Make a screen-sized version of the picture if requested
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| 239 | if ($self->{'screenviewsize'}) {
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| 240 |
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| 241 | # To do: if the actual image smaller than the screenview size,
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| 242 | # we should use the original !
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| 243 |
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| 244 | my $screenviewsize = $self->{'screenviewsize'};
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| 245 | my $screenviewtype = $self->{'screenviewtype'} || 'jpeg';
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| 246 | my $screenviewfilename = &util::get_tmp_filename() . ".$screenviewtype";
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| 247 | $self->{'tmp_filename3'} = $screenviewfilename;
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| 248 |
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| 249 | # make the screenview image
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| 250 | my $command = "convert -interlace plane -verbose -geometry $screenviewsize"
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| 251 | . "x$screenviewsize \"$filename\" \"$screenviewfilename\"";
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| 252 | print $outhandle "$command\n" if ($verbosity > 2);
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| 253 | my $result = "";
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| 254 | $result = `$command 2>&1` ;
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| 255 | print $outhandle "$result\n" if ($verbosity > 3);
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| 256 |
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| 257 | # get screenview dimensions, size and type
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| 258 | if ($result =~ m/[0-9]+x[0-9]+=>([0-9]+)x([0-9]+)/) {
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| 259 | $doc_obj->add_metadata ($section, "ScreenWidth", $1);
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| 260 | $doc_obj->add_metadata ($section, "ScreenHeight", $2);
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| 261 | }
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| 262 |
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| 263 | #add the screenview as an associated file ...
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| 264 | if (-e "$screenviewfilename") {
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| 265 | $doc_obj->associate_file("$screenviewfilename", "screenview.$screenviewtype",
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| 266 | "image/$screenviewtype",$section);
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| 267 | $doc_obj->add_metadata ($section, "ScreenType", $screenviewtype);
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| 268 | $doc_obj->add_metadata ($section, "Screen", "screenview.$screenviewtype");
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| 269 | } else {
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| 270 | print $outhandle "ImagePlug: couldn't find \"$screenviewfilename\"\n";
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| 271 | }
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| 272 | }
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| 273 |
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| 274 | return $type;
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| 275 | }
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| 276 |
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| 277 |
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| 278 | # Discover the characteristics of an image file with the ImageMagick
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| 279 | # "identify" command.
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| 280 |
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| 281 | sub identify {
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| 282 | my ($image, $outhandle, $verbosity) = @_;
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| 283 |
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| 284 | # Use the ImageMagick "identify" command to get the file specs
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| 285 | my $command = "identify $image 2>&1";
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| 286 | print $outhandle "$command\n" if ($verbosity > 2);
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| 287 | my $result = '';
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| 288 | $result = `$command`;
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| 289 | print $outhandle "$result\n" if ($verbosity > 3);
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| 290 |
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| 291 | # Read the type, width, and height
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| 292 | my $type = 'unknown';
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| 293 | my $width = 'unknown';
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| 294 | my $height = 'unknown';
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| 295 |
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| 296 | if ($result =~ /^$image (\w+) (\d+)x(\d+)/) {
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| 297 | $type = $1;
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| 298 | $width = $2;
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| 299 | $height = $3;
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| 300 | }
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| 301 |
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| 302 | # Read the size
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| 303 | my $size = "unknown";
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| 304 | if ($result =~ m/^.* ([0-9]+)b/) {
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| 305 | $size = $1;
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| 306 | } elsif ($result =~ m/^.* ([0-9]+)kb/) {
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| 307 | $size = 1024 * $1;
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| 308 | }
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| 309 |
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| 310 | print $outhandle "file: $image:\t $type, $width, $height, $size\n"
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| 311 | if ($verbosity > 2);
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| 312 |
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| 313 | # Return the specs
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| 314 | return ($type, $width, $height, $size);
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| 315 | }
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| 316 |
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| 317 |
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| 318 | # The ImagePlug read() function. This function does all the right things
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| 319 | # to make general options work for a given plugin. It calls the process()
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| 320 | # function which does all the work specific to a plugin (like the old
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| 321 | # read functions used to do). Most plugins should define their own
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| 322 | # process() function and let this read() function keep control.
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| 323 | #
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| 324 | # ImagePlug overrides read() because there is no need to read the actual
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| 325 | # text of the file in, because the contents of the file is not text...
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| 326 | #
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| 327 | # Return number of files processed, undef if can't process
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| 328 | # Note that $base_dir might be "" and that $file might
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| 329 | # include directories
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| 330 |
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| 331 | sub read {
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| 332 | my $self = shift (@_);
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| 333 | my ($pluginfo, $base_dir, $file, $metadata, $processor, $maxdocs) = @_;
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| 334 |
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| 335 | my $outhandle = $self->{'outhandle'};
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| 336 |
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| 337 | my $filename = &util::filename_cat($base_dir, $file);
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| 338 | return 0 if $self->{'block_exp'} ne "" && $filename =~ /$self->{'block_exp'}/;
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| 339 | if ($filename !~ /$self->{'process_exp'}/ || !-f $filename) {
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| 340 | return undef;
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| 341 | }
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| 342 | print $outhandle "ImagePlug processing \"$filename\"\n"
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| 343 | if $self->{'verbosity'} > 1;
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| 344 |
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| 345 | #if there's a leading directory name, eat it...
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| 346 | $file =~ s/^.*[\/\\]//;
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| 347 |
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| 348 | # create a new document
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| 349 | my $doc_obj = new doc ($filename, "indexed_doc");
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| 350 | $doc_obj->set_OIDtype ($processor->{'OIDtype'});
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| 351 |
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| 352 | #run convert to get the thumbnail and extract size and type info
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| 353 | my $result = run_convert($self, $filename, $file, $doc_obj);
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| 354 |
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| 355 | if (!defined $result)
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| 356 | {
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| 357 | print "ImagePlug: couldn't process \"$filename\"\n";
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| 358 | return 0;
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| 359 | }
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| 360 |
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| 361 | #create an empty text string so we don't break downstream plugins
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| 362 | my $text = "Dummy text to sidestep display bug.";
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| 363 |
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| 364 | # include any metadata passed in from previous plugins
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| 365 | # note that this metadata is associated with the top level section
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| 366 | my $section = $doc_obj->get_top_section();
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| 367 | $self->extra_metadata ($doc_obj, $section, $metadata);
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| 368 |
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| 369 | # do plugin specific processing of doc_obj
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| 370 | return undef unless defined ($self->process (\$text, $pluginfo, $base_dir,
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| 371 | $file, $metadata, $doc_obj));
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| 372 |
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| 373 | # do any automatic metadata extraction
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| 374 | $self->auto_extract_metadata ($doc_obj);
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| 375 |
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| 376 | # add an OID
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| 377 | $doc_obj->set_OID();
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| 378 | $doc_obj->add_text($section, $text);
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| 379 |
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| 380 | # process the document
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| 381 | $processor->process($doc_obj);
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| 382 |
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| 383 | # clean up temporary files - we do this here instead of in
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| 384 | # run_convert becuase associated files aren't actually copied
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| 385 | # until after process has been run.
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| 386 | if (defined $self->{'tmp_filename'} &&
|
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| 387 | -e $self->{'tmp_filename'}) {
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| 388 | &util::rm($self->{'tmp_filename'})
|
|---|
| 389 | }
|
|---|
| 390 | if (defined $self->{'tmp_filename2'} &&
|
|---|
| 391 | -e $self->{'tmp_filename2'}) {
|
|---|
| 392 | &util::rm($self->{'tmp_filename2'})
|
|---|
| 393 | }
|
|---|
| 394 | if (defined $self->{'tmp_filename3'} &&
|
|---|
| 395 | -e $self->{'tmp_filename3'}) {
|
|---|
| 396 | &util::rm($self->{'tmp_filename3'})
|
|---|
| 397 | }
|
|---|
| 398 |
|
|---|
| 399 | $self->{'num_processed'}++;
|
|---|
| 400 |
|
|---|
| 401 | return 1;
|
|---|
| 402 | }
|
|---|
| 403 |
|
|---|
| 404 | # do plugin specific processing of doc_obj
|
|---|
| 405 | sub process {
|
|---|
| 406 | my $self = shift (@_);
|
|---|
| 407 | my ($textref, $pluginfo, $base_dir, $file, $metadata, $doc_obj) = @_;
|
|---|
| 408 | my $outhandle = $self->{'outhandle'};
|
|---|
| 409 |
|
|---|
| 410 | return 1;
|
|---|
| 411 | }
|
|---|
| 412 |
|
|---|
| 413 | 1;
|
|---|
