Mercurial > judyates

comparison e2gallerypro/e2upload/Backend/Assets/getid3/module.graphic.gif.php @ 3:3f6b44aa6b35 judyates

Find changesets by keywords (author, files, the commit message), revision number or hash, or revset expression.
[svn r4] added ability to buy stuff, from a Prints page, but it doesn't work well with the css, and it also has not been fitted into the perl make system.
author rlm
date Mon, 22 Feb 2010 08:02:39 -0500
parents
children
comparison
equal deleted inserted replaced
2:670229c4eb4b 3:3f6b44aa6b35
1 <?php
2 // +----------------------------------------------------------------------+
3 // | PHP version 5 |
4 // +----------------------------------------------------------------------+
5 // | Copyright (c) 2002-2006 James Heinrich, Allan Hansen |
6 // +----------------------------------------------------------------------+
7 // | This source file is subject to version 2 of the GPL license, |
8 // | that is bundled with this package in the file license.txt and is |
9 // | available through the world-wide-web at the following url: |
10 // | http://www.gnu.org/copyleft/gpl.html |
11 // +----------------------------------------------------------------------+
12 // | getID3() - http://getid3.sourceforge.net or http://www.getid3.org |
13 // +----------------------------------------------------------------------+
14 // | Authors: James Heinrich <infoØgetid3*org> |
15 // | Allan Hansen <ahØartemis*dk> |
16 // +----------------------------------------------------------------------+
17 // | module.graphic.gif.php |
18 // | Module for analyzing CompuServe GIF graphic files. |
19 // | dependencies: NONE |
20 // +----------------------------------------------------------------------+
21 //
22 // $Id: module.graphic.gif.php,v 1.2 2006/11/02 10:48:02 ah Exp $
23
24
25
26 class getid3_gif extends getid3_handler
27 {
28
29 public function Analyze() {
30
31 $getid3 = $this->getid3;
32
33 $getid3->info['fileformat'] = 'gif';
34 $getid3->info['video']['dataformat'] = 'gif';
35 $getid3->info['video']['lossless'] = true;
36 $getid3->info['video']['pixel_aspect_ratio'] = (float)1;
37
38 $getid3->info['gif']['header'] = array ();
39 $info_gif_header = &$getid3->info['gif']['header'];
40
41 fseek($getid3->fp, $getid3->info['avdataoffset'], SEEK_SET);
42 $gif_header = fread($getid3->fp, 13);
43
44 // Magic bytes
45 $info_gif_header['raw']['identifier'] = 'GIF';
46
47 getid3_lib::ReadSequence('LittleEndian2Int', $info_gif_header['raw'], $gif_header, 3,
48 array (
49 'version' => -3, // string
50 'width' => 2,
51 'height' => 2,
52 'flags' => 1,
53 'bg_color_index' => 1,
54 'aspect_ratio' => 1
55 )
56 );
57
58 $getid3->info['video']['resolution_x'] = $info_gif_header['raw']['width'];
59 $getid3->info['video']['resolution_y'] = $info_gif_header['raw']['height'];
60 $getid3->info['gif']['version'] = $info_gif_header['raw']['version'];
61
62 $info_gif_header['flags']['global_color_table'] = (bool)($info_gif_header['raw']['flags'] & 0x80);
63
64 if ($info_gif_header['raw']['flags'] & 0x80) {
65 // Number of bits per primary color available to the original image, minus 1
66 $info_gif_header['bits_per_pixel'] = 3 * ((($info_gif_header['raw']['flags'] & 0x70) >> 4) + 1);
67 } else {
68 $info_gif_header['bits_per_pixel'] = 0;
69 }
70
71 $info_gif_header['flags']['global_color_sorted'] = (bool)($info_gif_header['raw']['flags'] & 0x40);
72 if ($info_gif_header['flags']['global_color_table']) {
73 // the number of bytes contained in the Global Color Table. To determine that
74 // actual size of the color table, raise 2 to [the value of the field + 1]
75 $info_gif_header['global_color_size'] = pow(2, ($info_gif_header['raw']['flags'] & 0x07) + 1);
76 $getid3->info['video']['bits_per_sample'] = ($info_gif_header['raw']['flags'] & 0x07) + 1;
77 } else {
78 $info_gif_header['global_color_size'] = 0;
79 }
80
81 if ($info_gif_header['raw']['aspect_ratio'] != 0) {
82 // Aspect Ratio = (Pixel Aspect Ratio + 15) / 64
83 $info_gif_header['aspect_ratio'] = ($info_gif_header['raw']['aspect_ratio'] + 15) / 64;
84 }
85
86 return true;
87 }
88
89 }
90
91
92 ?>