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         // We never want to use .bmp in an <img/> tag
  15         function mustRender( $file ) {
  16                 return true;
  17         }
  18
  19         // Render files as PNG
  20         function getThumbType( $text, $mime ) {
  21                 return array( 'png', 'image/png' );
  22         }
  23
  24         /*
  25          * Get width and height from the bmp header.
  26          */
  27         function getImageSize( $image, $filename ) {
  28                 $f = fopen( $filename, 'r' );
  29                 if(!$f) return false;
  30                 $header = fread( $f, 54 );
  31                 fclose($f);
  32
  33                 // Extract binary form of width and height from the header
  34                 $w = substr( $header, 18, 4);
  35                 $h = substr( $header, 22, 4);
  36
  37                 // Convert the unsigned long 32 bits (little endian):
  38                 $w = unpack( 'V' , $w );
  39                 $h = unpack( 'V' , $h );
  40                 return array( $w[1], $h[1] );
  41         }
  42 }