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<?php |
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namespace Soluble\Media\Converter; |
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use Soluble\Media\BoxDimension; |
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use Imagine\Imagick\Imagine as ImagickImagine; |
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use Imagine\Gd\Imagine as GdImagine; |
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use Imagine\Image\ImageInterface; |
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use Imagine\Image\Box; |
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use Zend\Cache\Storage\StorageInterface; |
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class ImageConverter implements ConverterInterface |
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{ |
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protected $default_backend = 'gd'; |
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protected $supported_backends = ['gd', 'imagick']; |
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protected $backend; |
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protected $default_quality = 90; |
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/** |
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* |
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* @var boolean |
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*/ |
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protected $cacheEnabled = false; |
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/** |
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* |
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* @var StorageInterface |
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*/ |
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protected $cacheStorage; |
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/** |
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* |
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* @param array $params |
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*/ |
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public function __construct(array $params = []) |
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{ |
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if (array_key_exists('backend', $params)) { |
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$this->setBackend($params['backend']); |
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} else { |
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$this->setBackend($this->default_backend); |
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} |
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} |
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/** |
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* Set the backend gd of imagick to use |
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* |
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* @param string $backend (gd/imagick) |
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* |
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* @throws Exception\UnsupportedBackendException |
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* @return \Soluble\Media\Converter\ImageConverter |
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*/ |
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public function setBackend($backend) |
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{ |
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if (!is_string($backend)) { |
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throw new Exception\InvalidArgumentException(__METHOD__ . " backend parameter must be a valid string."); |
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} |
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if (!in_array($backend, $this->supported_backends)) { |
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$valid_backends = implode(',', $this->supported_backends); |
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throw new Exception\UnsupportedBackendException(__METHOD__ . " Backend '$backend' is not supported, supported backends are '$valid_backends'''"); |
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} |
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$this->backend = $backend; |
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return $this; |
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} |
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/** |
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* |
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* @param string $filename |
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* @param \Soluble\Media\BoxDimension $box |
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* @param string $format |
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* @param int $quality |
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* @throws \Soluble\Media\Converter\Exception |
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* @throws \Exception |
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*/ |
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public function getThumbnail($filename, BoxDimension $box, $format = null, $quality = null) |
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{ |
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$width = $box->getWidth(); |
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$height = $box->getHeight(); |
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if ($quality === null) { |
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$quality = $this->default_quality; |
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} |
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$cache_key = md5("$filename/$width/$height/$quality/$format"); |
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if ($this->cacheEnabled && $this->cacheStorage->hasItem($cache_key)) { |
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$cacheMd = $this->cacheStorage->getMetadata($cache_key); |
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if ($cacheMd['mtime'] < filemtime($filename)) { |
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// invalid cache |
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$binaryContent = $this->generateThumbnail($filename, $box, $format, $quality); |
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$this->cacheStorage->setItem($cache_key, $binaryContent); |
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} else { |
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$binaryContent = $this->cacheStorage->getItem($cache_key); |
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} |
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} else { |
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$binaryContent = $this->generateThumbnail($filename, $box, $format, $quality); |
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$this->cacheStorage->setItem($cache_key, $binaryContent); |
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} |
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switch ($format) { |
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case 'jpg': |
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$content_type = 'image/jpeg'; |
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break; |
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case 'png': |
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$content_type = 'image/png'; |
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break; |
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case 'gif': |
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$content_type = 'image/gif'; |
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break; |
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default: |
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throw new \Exception("Unsupported format '$format'"); |
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} |
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header("Content-type: $content_type", true); |
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header("Accept-Ranges: bytes", true); |
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header("Cache-control: max-age=2592000, public", true); |
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header("Content-Disposition: inline; filename=\"$filename\";", true); |
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header('Last-Modified: '. gmdate('D, d M Y H:i:s', filemtime($filename)).' GMT', true); |
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header('Expires: ' . gmdate('D, d M Y H:i:s', strtotime('+1 years')) . ' GMT', true); |
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//header('Content-Disposition: attachment; filename="downloaded.pdf"'); |
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header('Pragma: cache', true); |
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echo $binaryContent; |
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die(); |
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} |
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protected function generateThumbnail($filename, BoxDimension $box, $format = null, $quality = null, $strip = true) |
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{ |
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$width = $box->getWidth(); |
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$height = $box->getHeight(); |
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try { |
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$imagine = $this->getImagine(); |
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if ($imagine instanceof ImagickImagine) { |
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$filter = ImageInterface::FILTER_LANCZOS; |
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/** |
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* BESSEL : 53k |
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* LANCZOS: 54.5k |
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* GAUSSIAN: 52k |
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* MITCHELL: 53k |
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jpegtran -optimize 14610.jpg > 14610_test.jpg |
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*/ |
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} else { |
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$filter = ImageInterface::FILTER_UNDEFINED; |
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} |
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$image = $imagine->open($filename); |
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// Get dimension by keeping proportions |
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$size = $image->getSize(); |
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$ratio_x = $size->getWidth() / $width; |
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$ratio_y = $size->getHeight() / $height; |
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$max_ratio = max($ratio_x, $ratio_y); |
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$new_width = (int) ($size->getWidth() / $max_ratio); |
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$new_height = (int) ($size->getHeight() / $max_ratio); |
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$newSize = new Box($new_width, $new_height); |
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if ($strip) { |
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$image->strip(); |
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} |
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//$image->interlace(ImageInterface::INTERLACE_LINE); |
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$image->resize($newSize, $filter); |
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$options = [ |
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'quality' => $quality, |
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'flatten' => true, |
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//'resolution-units' => ImageInterface::RESOLUTION_PIXELSPERINCH, |
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//'resolution-y' => 72, |
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//'resolution-x' => 72, |
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]; |
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//var_dump(get_class($image));die(); |
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$content = $image->get($format, $options); |
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} catch (\Exception $e) { |
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// ERROR 403 ? |
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//var_dump($e); |
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//die(); |
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throw $e; |
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} |
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return $content; |
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} |
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/** |
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* |
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* @param string $backend |
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* @return |
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*/ |
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protected function getImagine($backend = null) |
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{ |
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if ($backend === null) { |
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$backend = $this->backend; |
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} |
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switch (strtolower($backend)) { |
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case 'imagick': |
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$imagine = new ImagickImagine(); |
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break; |
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case 'gd': |
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$imagine = new GdImagine(); |
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break; |
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default: |
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throw new \Exception("Library '$backend' not supported"); |
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} |
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return $imagine; |
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} |
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/** |
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* |
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* @param StorageInterface $storage |
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* @return \Soluble\Media\Converter\ImageConverter |
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*/ |
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public function setCache(StorageInterface $storage) |
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{ |
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$this->cacheStorage = $storage; |
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$this->cacheEnabled = true; |
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return $this; |
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} |
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/** |
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* Unset cache (primarly for unit testing) |
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* @return \Soluble\Media\Converter\ImageConverter |
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*/ |
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public function unsetCache() |
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{ |
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$this->cacheEnabled = false; |
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$this->cacheStorage = null; |
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return $this; |
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} |
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} |
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belgattitude /
solublecomponents
