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comparison e2gallerypro/e2upload/Backend/Assets/getid3/module.lib.image_size.php @ 3:3f6b44aa6b35 judyates

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[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
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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.lib.data-hash.php |
18 // | getID3() library file. |
19 // | dependencies: NONE. |
20 // +----------------------------------------------------------------------+
21 //
22 // $Id: module.lib.image_size.php,v 1.2 2006/11/02 10:48:02 ah Exp $
23
24
25
26 class getid3_lib_image_size
27 {
28
29 const GIF_SIG = "\x47\x49\x46"; // 'GIF'
30 const PNG_SIG = "\x89\x50\x4E\x47\x0D\x0A\x1A\x0A";
31 const JPG_SIG = "\xFF\xD8\xFF";
32 const JPG_SOS = "\xDA"; // Start Of Scan - image data start
33 const JPG_SOF0 = "\xC0"; // Start Of Frame N
34 const JPG_SOF1 = "\xC1"; // N indicates which compression process
35 const JPG_SOF2 = "\xC2"; // Only SOF0-SOF2 are now in common use
36 const JPG_SOF3 = "\xC3"; // NB: codes C4 and CC are *not* SOF markers
37 const JPG_SOF5 = "\xC5";
38 const JPG_SOF6 = "\xC6";
39 const JPG_SOF7 = "\xC7";
40 const JPG_SOF9 = "\xC9";
41 const JPG_SOF10 = "\xCA";
42 const JPG_SOF11 = "\xCB"; // NB: codes C4 and CC are *not* SOF markers
43 const JPG_SOF13 = "\xCD";
44 const JPG_SOF14 = "\xCE";
45 const JPG_SOF15 = "\xCF";
46 const JPG_EOI = "\xD9"; // End Of Image (end of datastream)
47
48
49 static public function get($img_data) {
50
51 $height = $width = $type = '';
52
53 if ((substr($img_data, 0, 3) == getid3_lib_image_size::GIF_SIG) && (strlen($img_data) > 10)) {
54
55 $dim = unpack('v2dim', substr($img_data, 6, 4));
56 $width = $dim['dim1'];
57 $height = $dim['dim2'];
58 $type = 1;
59
60 } elseif ((substr($img_data, 0, 8) == getid3_lib_image_size::PNG_SIG) && (strlen($img_data) > 24)) {
61
62 $dim = unpack('N2dim', substr($img_data, 16, 8));
63 $width = $dim['dim1'];
64 $height = $dim['dim2'];
65 $type = 3;
66
67 } elseif ((substr($img_data, 0, 3) == getid3_lib_image_size::JPG_SIG) && (strlen($img_data) > 4)) {
68
69 ///////////////// JPG CHUNK SCAN ////////////////////
70 $img_pos = $type = 2;
71 $buffer = strlen($img_data) - 2;
72 while ($img_pos < strlen($img_data)) {
73
74 // synchronize to the marker 0xFF
75 $img_pos = strpos($img_data, 0xFF, $img_pos) + 1;
76 $marker = $img_data[$img_pos];
77 do {
78 $marker = ord($img_data[$img_pos++]);
79 } while ($marker == 255);
80
81 // find dimensions of block
82 switch (chr($marker)) {
83
84 // Grab width/height from SOF segment (these are acceptable chunk types)
85 case getid3_lib_image_size::JPG_SOF0:
86 case getid3_lib_image_size::JPG_SOF1:
87 case getid3_lib_image_size::JPG_SOF2:
88 case getid3_lib_image_size::JPG_SOF3:
89 case getid3_lib_image_size::JPG_SOF5:
90 case getid3_lib_image_size::JPG_SOF6:
91 case getid3_lib_image_size::JPG_SOF7:
92 case getid3_lib_image_size::JPG_SOF9:
93 case getid3_lib_image_size::JPG_SOF10:
94 case getid3_lib_image_size::JPG_SOF11:
95 case getid3_lib_image_size::JPG_SOF13:
96 case getid3_lib_image_size::JPG_SOF14:
97 case getid3_lib_image_size::JPG_SOF15:
98 $dim = unpack('n2dim', substr($img_data, $img_pos + 3, 4));
99 $height = $dim['dim1'];
100 $width = $dim['dim2'];
101 break 2; // found it so exit
102
103 case getid3_lib_image_size::JPG_EOI:
104 case getid3_lib_image_size::JPG_SOS:
105 return false;
106
107 default: // We're not interested in other markers
108 $skiplen = (ord($img_data[$img_pos++]) << 8) + ord($img_data[$img_pos++]) - 2;
109 // if the skip is more than what we've read in, read more
110 $buffer -= $skiplen;
111 if ($buffer < 512) { // if the buffer of data is too low, read more file.
112 return false;
113 }
114 $img_pos += $skiplen;
115 break;
116 }
117 }
118 }
119
120 return array ($width, $height, $type);
121 } // end function
122
123
124 }
125
126 ?>