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