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<?php |
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/* |
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* This file is part of the `liip/LiipImagineBundle` project. |
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* |
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* (c) https://github.com/liip/LiipImagineBundle/graphs/contributors |
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* |
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* For the full copyright and license information, please view the LICENSE.md |
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* file that was distributed with this source code. |
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*/ |
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namespace Liip\ImagineBundle\Imagine\Filter\Loader; |
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use Imagine\Filter\Basic\Resize; |
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use Imagine\Image\Box; |
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use Imagine\Image\ImageInterface; |
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/** |
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* Scale filter. |
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* |
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* @author Devi Prasad <https://github.com/deviprsd21> |
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*/ |
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class ScaleFilterLoader implements LoaderInterface |
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{ |
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/** |
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* @var string |
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*/ |
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protected $dimensionKey; |
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/** |
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* @var string |
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*/ |
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protected $ratioKey; |
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/** |
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* @var bool |
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*/ |
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protected $absoluteRatio; |
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public function __construct($dimensionKey = 'dim', $ratioKey = 'to', $absoluteRatio = true) |
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{ |
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$this->dimensionKey = $dimensionKey; |
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$this->ratioKey = $ratioKey; |
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$this->absoluteRatio = $absoluteRatio; |
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} |
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/** |
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* {@inheritdoc} |
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*/ |
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public function load(ImageInterface $image, array $options = []) |
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{ |
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if (!isset($options[$this->dimensionKey]) && !isset($options[$this->ratioKey])) { |
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throw new \InvalidArgumentException("Missing $this->dimensionKey or $this->ratioKey option."); |
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} |
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$size = $image->getSize(); |
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$origWidth = $size->getWidth(); |
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$origHeight = $size->getHeight(); |
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$ratio = 1; |
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if (isset($options[$this->ratioKey])) { |
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$ratio = $this->absoluteRatio ? $options[$this->ratioKey] : $this->calcAbsoluteRatio($options[$this->ratioKey]); |
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} elseif (isset($options[$this->dimensionKey])) { |
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$size = $options[$this->dimensionKey]; |
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$width = isset($size[0]) ? $size[0] : null; |
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$height = isset($size[1]) ? $size[1] : null; |
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$widthRatio = $width / $origWidth; |
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$heightRatio = $height / $origHeight; |
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if (null === $width || null === $height) { |
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$ratio = max($widthRatio, $heightRatio); |
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} else { |
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$ratio = ('min' === $this->dimensionKey) ? max($widthRatio, $heightRatio) : min($widthRatio, $heightRatio); |
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} |
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} |
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if ($this->isImageProcessable($ratio)) { |
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$filter = new Resize(new Box(round($origWidth * $ratio), round($origHeight * $ratio))); |
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return $filter->apply($image); |
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} |
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return $image; |
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} |
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protected function calcAbsoluteRatio($ratio) |
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{ |
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return $ratio; |
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} |
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protected function isImageProcessable($ratio) |
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{ |
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return true; |
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} |
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} |
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