root/gsdl/trunk/perllib/plugins/ImagePlugin.pm @ 16849

Revision 16849, 3.8 KB (checked in by kjdon, 11 years ago)

fixed a bad error in previous commit where I had put super::init instead of super::begin in the begin method

  • Property svn:keywords set to Author Date Id Revision
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1###########################################################################
2#
3# ImagePlugin.pm -- for processing standalone images
4# A component of the Greenstone digital library software
5# from the New Zealand Digital Library Project at the
6# University of Waikato, New Zealand.
7#
8# Copyright (C) 1999 New Zealand Digital Library Project
9#
10# This program is free software; you can redistribute it and/or modify
11# it under the terms of the GNU General Public License as published by
12# the Free Software Foundation; either version 2 of the License, or
13# (at your option) any later version.
14#
15# This program is distributed in the hope that it will be useful,
16# but WITHOUT ANY WARRANTY; without even the implied warranty of
17# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
18# GNU General Public License for more details.
19#
20# You should have received a copy of the GNU General Public License
21# along with this program; if not, write to the Free Software
22# Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
23#
24###########################################################################
25
26package ImagePlugin;
27
28use BasePlugin;
29use ImageConverter;
30
31use strict;
32no strict 'refs'; # allow filehandles to be variables and viceversa
33
34sub BEGIN {
35    @ImagePlugin::ISA = ('BasePlugin', 'ImageConverter');
36}
37
38my $arguments =
39    [ { 'name' => "process_exp",
40    'desc' => "{BasePlugin.process_exp}",
41    'type' => "regexp",
42    'deft' => &get_default_process_exp(),
43    'reqd' => "no" },
44      ];
45
46my $options = { 'name'     => "ImagePlugin",
47        'desc'     => "{ImagePlugin.desc}",
48        'abstract' => "no",
49        'inherits' => "yes",
50        'args'     => $arguments };
51
52
53
54sub new {
55    my ($class) = shift (@_);
56    my ($pluginlist,$inputargs,$hashArgOptLists) = @_;
57    push(@$pluginlist, $class);
58
59    push(@{$hashArgOptLists->{"ArgList"}},@{$arguments});
60    push(@{$hashArgOptLists->{"OptList"}},$options);
61
62    new ImageConverter($pluginlist, $inputargs, $hashArgOptLists);
63    my $self = new BasePlugin($pluginlist, $inputargs, $hashArgOptLists);
64
65    return bless $self, $class;
66}
67
68sub init {
69    my $self = shift (@_);
70    my ($verbosity, $outhandle, $failhandle) = @_;
71
72    print STDERR "calling super init\n";
73    $self->SUPER::init(@_);
74    print STDERR "after\n";
75    print $outhandle "print to outhandle\n";
76    $self->ImageConverter::init();
77}
78
79sub begin {
80    my $self = shift (@_);
81    my ($pluginfo, $base_dir, $processor, $maxdocs) = @_;
82
83    $self->SUPER::begin(@_);
84    $self->ImageConverter::begin();
85}
86
87sub get_default_process_exp {
88    my $self = shift (@_);
89
90    return q^(?i)(\.jpe?g|\.gif|\.png|\.bmp|\.xbm|\.tif?f)$^;
91}
92
93# this makes no sense for images
94sub block_cover_image
95{
96    my $self =shift (@_);
97    my ($filename) = @_;
98
99    return;
100}
101
102# do plugin specific processing of doc_obj
103sub process {
104    my $self = shift (@_);
105    # options??
106    my ($pluginfo, $base_dir, $file, $metadata, $doc_obj, $gli) = @_;
107
108
109    my $outhandle = $self->{'outhandle'};
110    my ($filename_full_path, $filename_no_path) = &util::get_full_filenames($base_dir, $file);
111
112    if ($self->{'image_conversion_available'} == 1) {
113    my $utf8_filename_no_path = $self->filepath_to_utf8($filename_no_path);
114    my $url_encoded_filename = &unicode::url_encode($utf8_filename_no_path);
115    $self->generate_images($filename_full_path, $url_encoded_filename, $doc_obj, $doc_obj->get_top_section()); # should we check the return value?
116    } else {
117    # do some basic stuff
118    # associate the image, fileformat, mimetype, srclink, srcicon
119    # do this if image magick not installed. but also if generate hasn't worked?? what about images too small?
120    }
121    #we have no text - adds dummy text and NoText metadata
122    $self->add_dummy_text($doc_obj, $doc_obj->get_top_section());
123
124    return 1;
125
126}
127
128sub clean_up_after_doc_obj_processing {
129    my $self = shift(@_);
130   
131    $self->ImageConverter::clean_up_temporary_files();
132}
133
1341;
135
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