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<?php |
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namespace Del; |
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use Del\Image\Exception\NotFoundException; |
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use Del\Image\Exception\NothingLoadedException; |
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use Del\Image\Strategy\GifStrategy; |
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use Del\Image\Strategy\ImageTypeStrategyInterface; |
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use Del\Image\Strategy\JpegStrategy; |
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use Del\Image\Strategy\PngStrategy; |
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class Image |
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{ |
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/** @var resource $image */ |
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private $image; |
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/** @var string $fileName */ |
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private $fileName; |
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/** @var ImageTypeStrategyInterface $strategy */ |
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private $strategy; |
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/** @var array $strategies */ |
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private $strategies = [ |
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IMAGETYPE_JPEG => JpegStrategy::class, |
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IMAGETYPE_GIF => GifStrategy::class, |
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IMAGETYPE_PNG => PngStrategy::class, |
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]; |
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/** |
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* @param string $filename |
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*/ |
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public function __construct($filename = null) |
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{ |
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if ($filename !== null) { |
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$this->fileName = $filename; |
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$this->load($filename); |
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} |
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} |
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/** |
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* @param $path |
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* @throws NotFoundException |
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*/ |
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private function checkFileExists($path) |
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{ |
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if (!file_exists($path)) { |
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throw new NotFoundException("$path does not exist"); |
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} |
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} |
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/** |
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* @param string $filename |
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* @throws NotFoundException |
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*/ |
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public function load($filename) |
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{ |
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$this->checkFileExists($filename); |
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$index = getimagesize($filename)[2]; |
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$this->strategy = new $this->strategies[$index](); |
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$this->image = $this->strategy->create($filename); |
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} |
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/** |
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* @param ImageTypeStrategyInterface $imageTypeStrategy |
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*/ |
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public function setImageStrategy(ImageTypeStrategyInterface $imageTypeStrategy): void |
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{ |
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$this->strategy = $imageTypeStrategy; |
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} |
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/** |
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* @param string $filename |
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* @param int $compression |
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* @param string $permissions |
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*/ |
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public function save($filename = null, $permissions = null, $compression = 100) |
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{ |
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$filename = ($filename) ?: $this->fileName; |
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$this->strategy->save($this->image, $filename, $compression); |
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$this->setPermissions($filename, $permissions); |
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} |
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/** |
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* @param $filename |
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* @param $permissions |
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*/ |
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private function setPermissions($filename, $permissions) |
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{ |
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if ($permissions !== null) { |
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chmod($filename, $permissions); |
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} |
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} |
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/** |
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* @param bool $return either output directly |
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* @return null|string image contents |
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*/ |
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public function output($return = false) |
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{ |
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$contents = null; |
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if ($return) { |
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ob_start(); |
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} |
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$this->renderImage(); |
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if ($return) { |
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$contents = ob_get_flush(); |
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} |
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return $contents; |
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} |
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private function renderImage() |
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{ |
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$this->strategy->render($this->image); |
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} |
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/** |
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* @return int |
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*/ |
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public function getWidth() |
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{ |
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return imagesx($this->image); |
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} |
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/** |
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* @return int |
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*/ |
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public function getHeight() |
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{ |
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return imagesy($this->image); |
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} |
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/** |
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* @param int $height |
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*/ |
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public function resizeToHeight($height) |
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{ |
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$ratio = $height / $this->getHeight(); |
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$width = $this->getWidth() * $ratio; |
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$this->resize($width, $height); |
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} |
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/** |
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* @param int $width |
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*/ |
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public function resizeToWidth($width) |
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{ |
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$ratio = $width / $this->getWidth(); |
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$height = $this->getHeight() * $ratio; |
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$this->resize($width, $height); |
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} |
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/** |
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* @param int $scale % |
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*/ |
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public function scale($scale) |
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{ |
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$width = $this->getWidth() * $scale / 100; |
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$height = $this->getHeight() * $scale / 100; |
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$this->resize($width, $height); |
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} |
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/** |
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* @param int $width |
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* @param int $height |
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*/ |
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public function resizeAndCrop($width, $height) |
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{ |
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$targetRatio = $width / $height; |
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$actualRatio = $this->getWidth() / $this->getHeight(); |
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if ($targetRatio == $actualRatio) { |
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// Scale to size |
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$this->resize($width, $height); |
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} elseif ($targetRatio > $actualRatio) { |
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// Resize to width, crop extra height |
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$this->resizeToWidth($width); |
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$this->crop($width, $height); |
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} else { |
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// Resize to height, crop additional width |
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$this->resizeToHeight($height); |
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$this->crop($width, $height); |
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} |
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} |
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/** |
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* Now with added Transparency resizing feature |
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* @param int $width |
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* @param int $height |
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*/ |
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public function resize($width, $height) |
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{ |
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$newImage = imagecreatetruecolor($width, $height); |
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$this->strategy->handleTransparency($newImage, $this->image); |
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// Now resample the image |
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imagecopyresampled($newImage, $this->image, 0, 0, 0, 0, $width, $height, $this->getWidth(), $this->getHeight()); |
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// And allocate to $this |
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$this->image = $newImage; |
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} |
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/** |
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* @param int $width |
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* @param int $height |
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* @param string $trim |
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*/ |
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public function crop($width, $height, $trim = 'center') |
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{ |
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$offsetX = 0; |
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$offsetY = 0; |
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$currentWidth = $this->getWidth(); |
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$currentHeight = $this->getHeight(); |
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if ($trim != 'left') { |
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$offsetX = $this->getOffsetX($currentWidth, $width, $trim); |
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$offsetY = $this->getOffsetY($currentHeight, $height, $trim); |
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} |
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$newImage = imagecreatetruecolor($width, $height); |
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imagecopyresampled($newImage, $this->image, 0, 0, $offsetX, $offsetY, $width, $height, $width, $height); |
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$this->image = $newImage; |
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} |
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/** |
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* @param $currentWidth |
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* @param $width |
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* @param $trim |
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* @return float|int |
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*/ |
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private function getOffsetX($currentWidth, $width, $trim) |
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{ |
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$offsetX = 0; |
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if ($currentWidth > $width) { |
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$diff = $currentWidth - $width; |
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$offsetX = ($trim == 'center') ? $diff / 2 : $diff; //full diff for trim right |
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} |
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return $offsetX; |
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} |
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/** |
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* @param $currentHeight |
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* @param $height |
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* @param $trim |
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* @return float|int |
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*/ |
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private function getOffsetY($currentHeight, $height, $trim) |
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{ |
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$offsetY = 0; |
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if ($currentHeight > $height) { |
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$diff = $currentHeight - $height; |
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$offsetY = ($trim == 'center') ? $diff / 2 : $diff; |
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} |
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return $offsetY; |
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} |
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/** |
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* @return mixed |
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* @throws NothingLoadedException |
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*/ |
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public function getHeader() |
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{ |
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if (!$this->strategy) { |
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throw new NothingLoadedException(); |
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} |
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return $this->strategy->getContentType(); |
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} |
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/** |
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* Frees up memory |
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*/ |
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public function destroy() |
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{ |
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imagedestroy($this->image); |
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} |
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} |