includes/media/BMP.php

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