includes/media/BMP.php

   1 <?php
   2 /**
   3  * @file
   4  * @ingroup Media
   5  */
   6
   7 /**
   8  * Handler for Microsoft's bitmap format; getimagesize() doesn't
   9  * support these files
  10  *
  11  * @ingroup Media
  12  */
  13 class BmpHandler extends BitmapHandler {
  14
  15         /*
  16          * Get width and height from the bmp header.
  17          */
  18         function getImageSize( $image, $filename ) {
  19                 $f = fopen( $filename, 'r' );
  20                 if(!$f) return false;
  21                 $header = fread( $f, 54 );
  22                 fclose($f);
  23
  24                 // Extract binary form of width and height from the header
  25                 $w = substr( $header, 18, 4);
  26                 $h = substr( $header, 22, 4);
  27
  28                 // Convert the unsigned long 32 bits (little endian):
  29                 $w = unpack( 'V' , $w );
  30                 $h = unpack( 'V' , $h );
  31                 return array( $w[1], $h[1] );
  32         }
  33 }