1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
|
<?php
/**
* Handler for PNG images.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License along
* with this program; if not, write to the Free Software Foundation, Inc.,
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
* http://www.gnu.org/copyleft/gpl.html
*
* @file
* @ingroup Media
*/
/**
* Handler for PNG images.
*
* @ingroup Media
*/
class PNGHandler extends BitmapHandler {
const BROKEN_FILE = '0';
/**
* @param File $image
* @param string $filename
* @return string
*/
function getMetadata( $image, $filename ) {
try {
$metadata = BitmapMetadataHandler::PNG( $filename );
} catch( Exception $e ) {
// Broken file?
wfDebug( __METHOD__ . ': ' . $e->getMessage() . "\n" );
return self::BROKEN_FILE;
}
return serialize( $metadata );
}
/**
* @param $image File
* @return array|bool
*/
function formatMetadata( $image ) {
$meta = $image->getMetadata();
if ( !$meta ) {
return false;
}
$meta = unserialize( $meta );
if ( !isset( $meta['metadata'] ) || count( $meta['metadata'] ) <= 1 ) {
return false;
}
if ( isset( $meta['metadata']['_MW_PNG_VERSION'] ) ) {
unset( $meta['metadata']['_MW_PNG_VERSION'] );
}
return $this->formatMetadataHelper( $meta['metadata'] );
}
/**
* @param $image File
* @return bool
*/
function isAnimatedImage( $image ) {
$ser = $image->getMetadata();
if ( $ser ) {
$metadata = unserialize( $ser );
if( $metadata['frameCount'] > 1 ) return true;
}
return false;
}
/**
* We do not support making APNG thumbnails, so always false
* @param $image File
* @return bool false
*/
function canAnimateThumbnail( $image ) {
return false;
}
function getMetadataType( $image ) {
return 'parsed-png';
}
function isMetadataValid( $image, $metadata ) {
if ( $metadata === self::BROKEN_FILE ) {
// Do not repetitivly regenerate metadata on broken file.
return self::METADATA_GOOD;
}
wfSuppressWarnings();
$data = unserialize( $metadata );
wfRestoreWarnings();
if ( !$data || !is_array( $data ) ) {
wfDebug( __METHOD__ . ' invalid png metadata' );
return self::METADATA_BAD;
}
if ( !isset( $data['metadata']['_MW_PNG_VERSION'] )
|| $data['metadata']['_MW_PNG_VERSION'] != PNGMetadataExtractor::VERSION ) {
wfDebug( __METHOD__ . ' old but compatible png metadata' );
return self::METADATA_COMPATIBLE;
}
return self::METADATA_GOOD;
}
/**
* @param $image File
* @return string
*/
function getLongDesc( $image ) {
global $wgLang;
$original = parent::getLongDesc( $image );
wfSuppressWarnings();
$metadata = unserialize( $image->getMetadata() );
wfRestoreWarnings();
if( !$metadata || $metadata['frameCount'] <= 0 )
return $original;
$info = array();
$info[] = $original;
if ( $metadata['loopCount'] == 0 ) {
$info[] = wfMessage( 'file-info-png-looped' )->parse();
} elseif ( $metadata['loopCount'] > 1 ) {
$info[] = wfMessage( 'file-info-png-repeat' )->numParams( $metadata['loopCount'] )->parse();
}
if ( $metadata['frameCount'] > 0 ) {
$info[] = wfMessage( 'file-info-png-frames' )->numParams( $metadata['frameCount'] )->parse();
}
if ( $metadata['duration'] ) {
$info[] = $wgLang->formatTimePeriod( $metadata['duration'] );
}
return $wgLang->commaList( $info );
}
}
|
