1<?php
2/**
3 * Handler for Microsoft's bitmap format.
4 *
5 * This program is free software; you can redistribute it and/or modify
6 * it under the terms of the GNU General Public License as published by
7 * the Free Software Foundation; either version 2 of the License, or
8 * (at your option) any later version.
9 *
10 * This program is distributed in the hope that it will be useful,
11 * but WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
13 * GNU General Public License for more details.
14 *
15 * You should have received a copy of the GNU General Public License along
16 * with this program; if not, write to the Free Software Foundation, Inc.,
17 * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
18 * http://www.gnu.org/copyleft/gpl.html
19 *
20 * @file
21 * @ingroup Media
22 */
23
24/**
25 * Handler for Microsoft's bitmap format; getimagesize() doesn't
26 * support these files
27 *
28 * @ingroup Media
29 */
30class BmpHandler extends BitmapHandler {
31	/**
32	 * @param File $file
33	 * @return bool
34	 */
35	public function mustRender( $file ) {
36		return true;
37	}
38
39	/**
40	 * Render files as PNG
41	 *
42	 * @param string $ext
43	 * @param string $mime
44	 * @param array|null $params
45	 * @return array
46	 */
47	public function getThumbType( $ext, $mime, $params = null ) {
48		return [ 'png', 'image/png' ];
49	}
50
51	/**
52	 * Get width and height from the bmp header.
53	 *
54	 * @param File|FSFile $image
55	 * @param string $filename
56	 * @return array|false
57	 */
58	public function getImageSize( $image, $filename ) {
59		$f = fopen( $filename, 'rb' );
60		if ( !$f ) {
61			return false;
62		}
63		$header = fread( $f, 54 );
64		fclose( $f );
65
66		// Extract binary form of width and height from the header
67		$w = substr( $header, 18, 4 );
68		$h = substr( $header, 22, 4 );
69
70		// Convert the unsigned long 32 bits (little endian):
71		try {
72			$w = wfUnpack( 'V', $w, 4 );
73			$h = wfUnpack( 'V', $h, 4 );
74		} catch ( Exception $e ) {
75			return false;
76		}
77
78		return [ $w[1], $h[1] ];
79	}
80}
81