includes/media/BMP.php

   1 <?php
   2 /**
   3  * Handler for Microsoft's bitmap format
   4  *
   5  * @file
   6  * @ingroup Media
   7  */
   8
   9 /**
  10  * Handler for Microsoft's bitmap format; getimagesize() doesn't
  11  * support these files
  12  *
  13  * @ingroup Media
  14  */
  15 class BmpHandler extends BitmapHandler {
  16         // We never want to use .bmp in an <img/> tag
  17         function mustRender( $file ) {
  18                 return true;
  19         }
  20
  21         // Render files as PNG
  22         function getThumbType( $text, $mime, $params = null ) {
  23                 return array( 'png', 'image/png' );
  24         }
  25
  26         /*
  27          * Get width and height from the bmp header.
  28          */
  29         function getImageSize( $image, $filename ) {
  30                 $f = fopen( $filename, 'r' );
  31                 if(!$f) return false;
  32                 $header = fread( $f, 54 );
  33                 fclose($f);
  34
  35                 // Extract binary form of width and height from the header
  36                 $w = substr( $header, 18, 4);
  37                 $h = substr( $header, 22, 4);
  38
  39                 // Convert the unsigned long 32 bits (little endian):
  40                 $w = unpack( 'V' , $w );
  41                 $h = unpack( 'V' , $h );
  42                 return array( $w[1], $h[1] );
  43         }
  44 }