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<?php |
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declare(strict_types=1); |
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/** |
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* @copyright Copyright (c) 2018-2019 Branko Kokanovic <[email protected]> |
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* @copyright Copyright (c) 2018-2020 Matias De lellis <[email protected]> |
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* |
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* @author Branko Kokanovic <[email protected]> |
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* |
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* @license GNU AGPL version 3 or any later version |
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* |
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* This program is free software: you can redistribute it and/or modify |
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* it under the terms of the GNU Affero General Public License as |
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* published by the Free Software Foundation, either version 3 of the |
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* License, or (at your option) any later version. |
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* |
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* This program is distributed in the hope that it will be useful, |
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* but WITHOUT ANY WARRANTY; without even the implied warranty of |
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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* GNU Affero General Public License for more details. |
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* |
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* You should have received a copy of the GNU Affero General Public License |
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* along with this program. If not, see <http://www.gnu.org/licenses/>. |
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* |
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*/ |
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namespace OCA\FaceRecognition\Helper; |
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use OCP\Image; |
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use OCP\ILogger; |
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use OCP\ITempManager; |
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class TempImage extends Image { |
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/** @var string */ |
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private $imagePath; |
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/** @var string */ |
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private $tempPath; |
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/** @var string */ |
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private $preferredMimeType; |
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/** @var int */ |
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private $maxImageArea; |
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/** @var ITempManager */ |
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private $tempManager; |
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/** @var int */ |
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private $minImageSide; |
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/** @var float */ |
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private $ratio = -1.0; |
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/** @var bool */ |
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private $skipped = false; |
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public function __construct(string $imagePath, |
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string $preferredMimeType, |
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int $maxImageArea, |
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int $minImageSide) |
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{ |
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parent::__construct(); |
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$this->imagePath = $imagePath; |
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$this->preferredMimeType = $preferredMimeType; |
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$this->maxImageArea = $maxImageArea; |
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$this->minImageSide = $minImageSide; |
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$this->tempManager = \OC::$server->getTempManager(); |
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$this->prepareImage(); |
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} |
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public function __destruct() { |
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$this->tempManager->clean(); |
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} |
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/** |
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* Get the path of temporary image |
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* |
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* @return string |
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*/ |
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public function getTempPath(): string { |
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return $this->tempPath; |
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} |
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/** |
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* Obtain the ratio of the temporary image against the original |
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* |
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* @return float |
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*/ |
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2 |
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public function getRatio(): float { |
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2 |
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return $this->ratio; |
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} |
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/** Return if image was skipped |
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* |
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* @return bool |
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*/ |
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public function getSkipped(): bool { |
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return $this->skipped; |
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} |
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/** |
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* Obtain a temporary image according to the imposed restrictions. |
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* |
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*/ |
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private function prepareImage() { |
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$this->loadFromFile($this->imagePath); |
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$this->fixOrientation(); |
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if (!$this->valid()) { |
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throw new \RuntimeException("Image is not valid, probably cannot be loaded"); |
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} |
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if ((imagesx($this->resource()) < $this->minImageSide) || |
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(imagesy($this->resource()) < $this->minImageSide)) { |
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$this->skipped = true; |
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return; |
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} |
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$this->ratio = $this->resizeImage(); |
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$this->tempPath = $this->tempManager->getTemporaryFile(); |
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$this->save($this->tempPath, $this->preferredMimeType); |
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} |
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/** |
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* Resizes the image to reach max image area, but preserving ratio. |
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* |
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* @return float Ratio of resize. 1 if there was no resize |
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*/ |
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private function resizeImage(): float { |
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$widthOrig = imagesx($this->resource()); |
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$heightOrig = imagesy($this->resource()); |
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if (($widthOrig <= 0) || ($heightOrig <= 0)) { |
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$message = "Image is having non-positive width or height, cannot continue"; |
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throw new \RuntimeException($message); |
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} |
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$areaRatio = $this->maxImageArea / ($widthOrig * $heightOrig); |
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$scaleFactor = sqrt($areaRatio); |
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$newWidth = intval(round($widthOrig * $scaleFactor)); |
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$newHeight = intval(round($heightOrig * $scaleFactor)); |
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$success = $this->preciseResize($newWidth, $newHeight); |
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if ($success === false) { |
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throw new \RuntimeException("Error during image resize"); |
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} |
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return 1 / $scaleFactor; |
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} |
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} |
matiasdelellis /
facerecognition
