Verzeichnisstruktur phpBB-3.3.15
- Veröffentlicht
- 28.08.2024
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TypeWbmp.php
01 <?php
02
03 /**
04 * fast-image-size image type wbmp
05 * @package fast-image-size
06 * @copyright (c) Marc Alexander <admin@m-a-styles.de>
07 *
08 * For the full copyright and license information, please view the LICENSE
09 * file that was distributed with this source code.
10 */
11
12 namespace FastImageSize\Type;
13
14 class TypeWbmp extends TypeBase
15 {
16 /**
17 * {@inheritdoc}
18 */
19 public function getSize($filename)
20 {
21 $data = $this->fastImageSize->getImage($filename, 0, self::LONG_SIZE);
22
23 // Check if image is WBMP
24 if ($data === false || !$this->validWBMP($data))
25 {
26 return;
27 }
28
29 $size = unpack('Cwidth/Cheight', substr($data, self::SHORT_SIZE, self::SHORT_SIZE));
30
31 // Check if dimensions are valid. A file might be recognised as WBMP
32 // rather easily (see extra check for JPEG2000).
33 if (!$this->validDimensions($size))
34 {
35 return;
36 }
37
38 $this->fastImageSize->setSize($size);
39 $this->fastImageSize->setImageType(IMAGETYPE_WBMP);
40 }
41
42 /**
43 * Return if supplied data might be part of a valid WBMP file
44 *
45 * @param bool|string $data
46 *
47 * @return bool True if data might be part of a valid WBMP file, else false
48 */
49 protected function validWBMP($data)
50 {
51 return ord($data[0]) === 0 && ord($data[1]) === 0 && $data !== substr(TypeJp2::JPEG_2000_SIGNATURE, 0, self::LONG_SIZE);
52 }
53
54 /**
55 * Return whether dimensions are valid
56 *
57 * @param array $size Size array
58 *
59 * @return bool True if dimensions are valid, false if not
60 */
61 protected function validDimensions($size)
62 {
63 return $size['height'] > 0 && $size['width'] > 0;
64 }
65 }
66