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Unable to obtain information about the image
"marc1706/fast-image-size": "^1.1",
marc1706\fast-image-size\lib\Type\TypePng.php
<?php
/**
* fast-image-size image type png
* @package fast-image-size
* @copyright (c) Marc Alexander <[email protected]>
*
* For the full copyright and license information, please view the LICENSE
* file that was distributed with this source code.
*/
namespace FastImageSize\Type;
class TypePng extends TypeBase
{
/** @var string PNG header */
const PNG_HEADER = "\x89\x50\x4e\x47\x0d\x0a\x1a\x0a";
/** @var int PNG IHDR offset */
const PNG_IHDR_OFFSET = 12;
/**
* {@inheritdoc}
*/
public function getSize($filename)
{
// Retrieve image data including the header, the IHDR tag, and the
// following 2 chunks for the image width and height
$data = $this->fastImageSize->getImage($filename, 0, self::PNG_IHDR_OFFSET + 3 * self::LONG_SIZE);
// Check if header fits expected format specified by RFC 2083
if (substr($data, 0, self::PNG_IHDR_OFFSET - self::LONG_SIZE) !== self::PNG_HEADER || substr($data, self::PNG_IHDR_OFFSET, self::LONG_SIZE) !== 'IHDR')
{
// Returned here
return;
}
$size = unpack('Nwidth/Nheight', substr($data, self::PNG_IHDR_OFFSET + self::LONG_SIZE, self::LONG_SIZE * 2));
$this->fastImageSize->setSize($size);
$this->fastImageSize->setImageType(IMAGETYPE_PNG);
}
}
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