leftypol/inc/Service/Media/DefaultImageMetadataReader.php

<?php
namespace Vichan\Service\Media;

use Vichan\Data\ImageMetadataResult;
use Vichan\Data\MagickMetadataReader;


/**
 * Do not use this if you can.
 *
 * Some formats may contain no image or may contain multiple images. In these cases, getimagesize() might not be
 * able to properly determine the image size. getimagesize() will return zero for width and height in these cases.
 *
 * getimagesize() is agnostic of any image metadata.
 * If e.g. the Exif Orientation flag is set to a value which rotates the image by 90 or 270 degress, index 0 and 1
 * are swapped, i.e. the contain the height and width, respectively.
 */
class DefaultImageMetadataReader implements ImageMetadataReader {
	public function getMetadata(string $file_path): ImageMetadataResult {
		$ret = \getimagesize($file_path, $info);
		if ($ret === false) {
			throw new \RuntimeException("Could not read image sizes of '$file_path'");
		}
		if ($ret[2] == \IMAGETYPE_UNKNOWN) {
			throw new \RuntimeException("Error '$file_path' is not an image");
		}
		return new ImageMetadataResult($ret[0], $ret[1], $ret['mime']);
	}
}