9.5/_image_info_8php_source.html

<?php

namespace ‪TYPO3\CMS\Core\Type\File;


/*

 * This file is part of the TYPO3 CMS project.

 *

 * It is free software; you can redistribute it and/or modify it under

 * the terms of the GNU General Public License, either version 2

 * of the License, or any later version.

 *

 * For the full copyright and license information, please read the

 * LICENSE.txt file that was distributed with this source code.

 *

 * The TYPO3 project - inspiring people to share!

 */

use Psr\Log\LoggerAwareInterface;

use Psr\Log\LoggerAwareTrait;

use ‪TYPO3\CMS\Core\Imaging\GraphicalFunctions;

use ‪TYPO3\CMS\Core\Utility\GeneralUtility;


class ‪ImageInfo extends ‪FileInfo implements LoggerAwareInterface

{

    use LoggerAwareTrait;


    protected ‪$imageSizes;


    public function ‪getWidth()

    {

        ‪$imageSizes = $this->‪getImageSizes();

        return ‪$imageSizes[0];

    }


    public function ‪getHeight()

    {

        ‪$imageSizes = $this->‪getImageSizes();

        return ‪$imageSizes[1];

    }


    protected function ‪getExifAwareImageSize(string $imageFile)

    {

        $size = false;

        if (function_exists('getimagesize')) {

            $size = @getimagesize($imageFile);

        }

        if ($size === false) {

            return false;

        }

        [$width, $height] = $size;


        if (function_exists('exif_read_data')) {

            $exif = @exif_read_data($imageFile);

            // see: http://sylvana.net/jpegcrop/exif_orientation.html

            if (isset($exif['Orientation']) && $exif['Orientation'] >= 5 && $exif['Orientation'] <= 8) {

                return [$height, $width];

            }

        }


        return [$width, $height];

    }


    protected function ‪getImageSizes()

    {

        if ($this->imageSizes === null) {

            $this->imageSizes = $this->‪getExifAwareImageSize($this->getPathname());


            // Try SVG first as SVG size detection with IM/GM leads to an error output

            if ($this->imageSizes === false && $this->‪getMimeType() === 'image/svg+xml') {

                $this->imageSizes = $this->‪extractSvgImageSizes();

            }

            // Fallback to IM/GM identify

            if ($this->imageSizes === false) {

                $graphicalFunctions = GeneralUtility::makeInstance(GraphicalFunctions::class);

                $this->imageSizes = $graphicalFunctions->imageMagickIdentify($this->getPathname());

            }


            // In case the image size could not be retrieved, log the incident as a warning.

            if (empty($this->imageSizes)) {

                $this->logger->warning('I could not retrieve the image size for file ' . $this->getPathname());

                $this->imageSizes = [0, 0];

            }

        }

        return ‪$this->imageSizes;

    }


    protected function ‪extractSvgImageSizes()

    {

        $imagesSizes = [];


        $fileContent = file_get_contents($this->getPathname());

        // Disables the functionality to allow external entities to be loaded when parsing the XML, must be kept

        $previousValueOfEntityLoader = libxml_disable_entity_loader(true);

        $xml = simplexml_load_string($fileContent, 'SimpleXMLElement', LIBXML_NOERROR | LIBXML_NOWARNING);


        // If something went wrong with simpleXml don't try to read information

        if ($xml === false) {

            return false;

        }


        libxml_disable_entity_loader($previousValueOfEntityLoader);

        $xmlAttributes = $xml->attributes();


        // First check if width+height are set

        if (!empty($xmlAttributes['width']) && !empty($xmlAttributes['height'])) {

            $imagesSizes = [(int)$xmlAttributes['width'], (int)$xmlAttributes['height']];

        } elseif (!empty($xmlAttributes['viewBox'])) {

            // Fallback to viewBox

            $viewBox = explode(' ', $xmlAttributes['viewBox']);

            $imagesSizes = [(int)$viewBox[2], (int)$viewBox[3]];

        }


        return $imagesSizes !== [] ? $imagesSizes : false;

    }

}