1.1 --- /dev/null	Thu Jan 01 00:00:00 1970 +0000
     1.2 +++ b/e2gallerypro/e2upload/Backend/Assets/getid3/module.lib.image_size.php	Mon Feb 22 08:02:39 2010 -0500
     1.3 @@ -0,0 +1,126 @@
     1.4 +<?php
     1.5 +// +----------------------------------------------------------------------+
     1.6 +// | PHP version 5                                                        |
     1.7 +// +----------------------------------------------------------------------+
     1.8 +// | Copyright (c) 2002-2006 James Heinrich, Allan Hansen                 |
     1.9 +// +----------------------------------------------------------------------+
    1.10 +// | This source file is subject to version 2 of the GPL license,         |
    1.11 +// | that is bundled with this package in the file license.txt and is     |
    1.12 +// | available through the world-wide-web at the following url:           |
    1.13 +// | http://www.gnu.org/copyleft/gpl.html                                 |
    1.14 +// +----------------------------------------------------------------------+
    1.15 +// | getID3() - http://getid3.sourceforge.net or http://www.getid3.org    |
    1.16 +// +----------------------------------------------------------------------+
    1.17 +// | Authors: James Heinrich <infoØgetid3*org>                            |
    1.18 +// |          Allan Hansen <ahØartemis*dk>                                |
    1.19 +// +----------------------------------------------------------------------+
    1.20 +// | module.lib.data-hash.php                                             |
    1.21 +// | getID3() library file.                                               |
    1.22 +// | dependencies: NONE.                                                  |
    1.23 +// +----------------------------------------------------------------------+
    1.24 +//
    1.25 +// $Id: module.lib.image_size.php,v 1.2 2006/11/02 10:48:02 ah Exp $
    1.26 +
    1.27 +
    1.28 +
    1.29 +class getid3_lib_image_size
    1.30 +{
    1.31 +    
    1.32 +    const GIF_SIG   = "\x47\x49\x46";                           // 'GIF'
    1.33 +    const PNG_SIG   = "\x89\x50\x4E\x47\x0D\x0A\x1A\x0A";
    1.34 +    const JPG_SIG   = "\xFF\xD8\xFF";
    1.35 +    const JPG_SOS   = "\xDA";                                   // Start Of Scan - image data start
    1.36 +    const JPG_SOF0  = "\xC0";                                   // Start Of Frame N
    1.37 +    const JPG_SOF1  = "\xC1";                                   // N indicates which compression process
    1.38 +    const JPG_SOF2  = "\xC2";                                   // Only SOF0-SOF2 are now in common use
    1.39 +    const JPG_SOF3  = "\xC3";                                   // NB: codes C4 and CC are *not* SOF markers
    1.40 +    const JPG_SOF5  = "\xC5";                                   
    1.41 +    const JPG_SOF6  = "\xC6";                                   
    1.42 +    const JPG_SOF7  = "\xC7";                                   
    1.43 +    const JPG_SOF9  = "\xC9";                                   
    1.44 +    const JPG_SOF10 = "\xCA";                                   
    1.45 +    const JPG_SOF11 = "\xCB";                                   // NB: codes C4 and CC are *not* SOF markers
    1.46 +    const JPG_SOF13 = "\xCD";                                   
    1.47 +    const JPG_SOF14 = "\xCE";                                   
    1.48 +    const JPG_SOF15 = "\xCF";                                   
    1.49 +    const JPG_EOI   = "\xD9";                                   // End Of Image (end of datastream)
    1.50 +
    1.51 +
    1.52 +    static public function get($img_data) {
    1.53 +
    1.54 +        $height = $width  = $type   = '';
    1.55 +        
    1.56 +        if ((substr($img_data, 0, 3) == getid3_lib_image_size::GIF_SIG) && (strlen($img_data) > 10)) {
    1.57 +            
    1.58 +            $dim = unpack('v2dim', substr($img_data, 6, 4));
    1.59 +            $width  = $dim['dim1'];
    1.60 +            $height = $dim['dim2'];
    1.61 +            $type = 1;
    1.62 +            
    1.63 +        } elseif ((substr($img_data, 0, 8) == getid3_lib_image_size::PNG_SIG) && (strlen($img_data) > 24)) {
    1.64 +            
    1.65 +            $dim = unpack('N2dim', substr($img_data, 16, 8));
    1.66 +            $width  = $dim['dim1'];
    1.67 +            $height = $dim['dim2'];
    1.68 +            $type = 3;
    1.69 +            
    1.70 +        } elseif ((substr($img_data, 0, 3) == getid3_lib_image_size::JPG_SIG) && (strlen($img_data) > 4)) {
    1.71 +            
    1.72 +            ///////////////// JPG CHUNK SCAN ////////////////////
    1.73 +            $img_pos = $type = 2;
    1.74 +            $buffer = strlen($img_data) - 2;
    1.75 +            while ($img_pos < strlen($img_data)) {
    1.76 +            
    1.77 +                // synchronize to the marker 0xFF
    1.78 +                $img_pos = strpos($img_data, 0xFF, $img_pos) + 1;
    1.79 +                $marker = $img_data[$img_pos];
    1.80 +                do {
    1.81 +                    $marker = ord($img_data[$img_pos++]);
    1.82 +                } while ($marker == 255);
    1.83 +            
    1.84 +                // find dimensions of block
    1.85 +                switch (chr($marker)) {
    1.86 +            
    1.87 +                    // Grab width/height from SOF segment (these are acceptable chunk types)
    1.88 +                    case getid3_lib_image_size::JPG_SOF0:
    1.89 +                    case getid3_lib_image_size::JPG_SOF1:
    1.90 +                    case getid3_lib_image_size::JPG_SOF2:
    1.91 +                    case getid3_lib_image_size::JPG_SOF3:
    1.92 +                    case getid3_lib_image_size::JPG_SOF5:
    1.93 +                    case getid3_lib_image_size::JPG_SOF6:
    1.94 +                    case getid3_lib_image_size::JPG_SOF7:
    1.95 +                    case getid3_lib_image_size::JPG_SOF9:
    1.96 +                    case getid3_lib_image_size::JPG_SOF10:
    1.97 +                    case getid3_lib_image_size::JPG_SOF11:
    1.98 +                    case getid3_lib_image_size::JPG_SOF13:
    1.99 +                    case getid3_lib_image_size::JPG_SOF14:
   1.100 +                    case getid3_lib_image_size::JPG_SOF15:
   1.101 +                        $dim = unpack('n2dim', substr($img_data, $img_pos + 3, 4));
   1.102 +                        $height = $dim['dim1'];
   1.103 +                        $width  = $dim['dim2'];
   1.104 +                        break 2; // found it so exit
   1.105 +            
   1.106 +                    case getid3_lib_image_size::JPG_EOI:
   1.107 +                    case getid3_lib_image_size::JPG_SOS:
   1.108 +                        return false;      
   1.109 +            
   1.110 +                    default:   // We're not interested in other markers
   1.111 +                        $skiplen = (ord($img_data[$img_pos++]) << 8) + ord($img_data[$img_pos++]) - 2;
   1.112 +                        // if the skip is more than what we've read in, read more
   1.113 +                        $buffer -= $skiplen;
   1.114 +                        if ($buffer < 512) { // if the buffer of data is too low, read more file.
   1.115 +                            return false; 
   1.116 +                        }
   1.117 +                        $img_pos += $skiplen;
   1.118 +                        break;
   1.119 +                } 
   1.120 +            } 
   1.121 +        } 
   1.122 +
   1.123 +        return array ($width, $height, $type);
   1.124 +    } // end function
   1.125 +
   1.126 +
   1.127 +}
   1.128 +
   1.129 +?>
   1.130 \ No newline at end of file