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<?php |
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namespace image\components\drivers; |
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use image\components\Kohana\Image; |
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use yii\base\ErrorException; |
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use \Imagick; |
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use \ImagickPixel; |
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/** |
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* Support for image manipulation using [Imagick](http://php.net/Imagick). |
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* |
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* @package image\components\drivers |
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* @category Drivers |
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* @author Tamas Mihalik [email protected] |
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* @copyright (c) 2009-2012,2018 Kohana Team |
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* @license http://kohanaphp.com/license.html |
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*/ |
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class Image_Imagick extends Image implements DriverInterface |
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{ |
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/** |
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* @var Imagick image magick object |
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*/ |
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protected $im; |
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/** |
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* Checks if ImageMagick is enabled. |
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* |
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* @throws ErrorException |
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* @return boolean |
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*/ |
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public static function check() |
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{ |
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if (!extension_loaded('imagick')) { |
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throw new ErrorException('Imagick is not installed, or the extension is not loaded'); |
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} |
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return Image_Imagick::$_checked = true; |
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} |
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/** |
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* Runs [Image_Imagick::check] and loads the image. |
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* |
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* @return void |
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* @param $file |
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* @throws ErrorException |
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* @throws \ImagickException |
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*/ |
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public function __construct($file) |
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{ |
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if (!Image_Imagick::$_checked) { |
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// Run the install check |
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Image_Imagick::check(); |
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} |
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parent::__construct($file); |
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$this->im = new Imagick; |
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$this->im->readImage($file); |
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// Force RGB colorspace if we are using non-RGB |
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$imageColorspace = $this->im->getImageColorspace(); |
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if ($imageColorspace !== Imagick::COLORSPACE_RGB && |
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$imageColorspace !== Imagick::COLORSPACE_SRGB |
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) { |
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$imageColorspace = Imagick::COLORSPACE_RGB; |
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} |
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if ($this->im->getImageColorspace() !== $imageColorspace) { |
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$this->im->transformImageColorspace($imageColorspace); |
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} |
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$this->im->setColorspace($imageColorspace); |
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if (!$this->im->getImageAlphaChannel()) { |
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// Force the image to have an alpha channel |
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$this->im->setImageAlphaChannel(Imagick::ALPHACHANNEL_SET); |
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} |
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} |
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/** |
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* Destroys the loaded image to free up resources. |
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* |
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* @return void |
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*/ |
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public function __destruct() |
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{ |
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$this->im->clear(); |
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$this->im->destroy(); |
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} |
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public function _do_resize($width, $height) |
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{ |
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if ($this->im->scaleImage($width, $height)) { |
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// Reset the width and height |
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$this->width = $this->im->getImageWidth(); |
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$this->height = $this->im->getImageHeight(); |
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return true; |
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} |
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return false; |
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} |
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/** |
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* Adaptation the image. |
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* |
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* @param integer $width image width |
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* @param integer $height image height |
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* @param integer $bg_width background width |
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* @param integer $bg_height background height |
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* @param integer $offset_x offset from the left |
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* @param integer $offset_y offset from the top |
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* @throws \ImagickException |
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*/ |
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public function _do_adapt($width, $height, $bg_width, $bg_height, $offset_x, $offset_y) |
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{ |
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$image = new Imagick(); |
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$image->newImage($bg_width, $bg_height, "none"); |
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$image->compositeImage($this->im, Imagick::COMPOSITE_ADD, $offset_x, $offset_y); |
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$this->im->clear(); |
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$this->im->destroy(); |
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$this->im = $image; |
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$this->width = $bg_width; |
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$this->height = $bg_height; |
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} |
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public function _do_crop($width, $height, $offset_x, $offset_y) |
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{ |
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if ($this->im->cropImage($width, $height, $offset_x, $offset_y)) { |
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// Reset the width and height |
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$this->width = $this->im->getImageWidth(); |
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$this->height = $this->im->getImageHeight(); |
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// Trim off hidden areas |
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$this->im->setImagePage($this->width, $this->height, 0, 0); |
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return true; |
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} |
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return false; |
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} |
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public function _do_rotate($degrees) |
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{ |
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if ($this->im->rotateImage(new ImagickPixel('transparent'), $degrees)) { |
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// Reset the width and height |
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$this->width = $this->im->getImageWidth(); |
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$this->height = $this->im->getImageHeight(); |
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// Trim off hidden areas |
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$this->im->setImagePage($this->width, $this->height, 0, 0); |
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return true; |
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} |
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return false; |
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} |
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public function _do_flip($direction) |
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{ |
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if ($direction === Image::HORIZONTAL) { |
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return $this->im->flopImage(); |
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} else { |
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return $this->im->flipImage(); |
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} |
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} |
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public function _do_sharpen($amount) |
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{ |
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// IM not support $amount under 5 (0.15) |
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$amount = ($amount < 5) ? 5 : $amount; |
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// Amount should be in the range of 0.0 to 3.0 |
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$amount = ($amount * 3.0) / 100; |
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return $this->im->sharpenImage(0, $amount); |
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} |
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public function _do_reflection($height, $opacity, $fade_in) |
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{ |
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// Clone the current image and flip it for reflection |
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$reflection = $this->im->clone(); |
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$reflection->flipImage(); |
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// Crop the reflection to the selected height |
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$reflection->cropImage($this->width, $height, 0, 0); |
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$reflection->setImagePage($this->width, $height, 0, 0); |
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// Select the fade direction |
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$direction = array('transparent', 'black'); |
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if ($fade_in) { |
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// Change the direction of the fade |
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$direction = array_reverse($direction); |
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} |
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// Create a gradient for fading |
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$fade = new Imagick; |
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$fade->newPseudoImage($reflection->getImageWidth(), $reflection->getImageHeight(), vsprintf('gradient:%s-%s', $direction)); |
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// Apply the fade alpha channel to the reflection |
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$reflection->compositeImage($fade, Imagick::COMPOSITE_DSTOUT, 0, 0); |
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// NOTE: Using setImageOpacity will destroy alpha channels! |
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$reflection->evaluateImage(Imagick::EVALUATE_MULTIPLY, $opacity / 100, Imagick::CHANNEL_ALPHA); |
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// Create a new container to hold the image and reflection |
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$image = new Imagick; |
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$image->newImage($this->width, $this->height + $height, new ImagickPixel); |
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// Force the image to have an alpha channel |
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$image->setImageAlphaChannel(Imagick::ALPHACHANNEL_SET); |
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// Force the background color to be transparent |
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// $image->setImageBackgroundColor(new ImagickPixel('transparent')); |
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// Place the image and reflection into the container |
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if ($image->compositeImage($this->im, Imagick::COMPOSITE_SRC, 0, 0) |
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&& $image->compositeImage($reflection, Imagick::COMPOSITE_OVER, 0, $this->height)) { |
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// Replace the current image with the reflected image |
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$this->im = $image; |
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// Reset the width and height |
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$this->width = $this->im->getImageWidth(); |
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$this->height = $this->im->getImageHeight(); |
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return true; |
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} |
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return false; |
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} |
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/** |
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* @param \image\components\Kohana\Image $image |
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* @param int $offset_x |
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* @param int $offset_y |
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* @param int $opacity |
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* @return bool |
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* @throws \ImagickException |
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*/ |
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public function _do_watermark(\image\components\Kohana\Image $image, $offset_x, $offset_y, $opacity) |
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{ |
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// Convert the Image intance into an Imagick instance |
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$watermark = new Imagick; |
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$watermark->readImageBlob($image->render(), $image->file); |
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if ($this->im->getImageColorspace() !== $this->im->getColorspace()) { |
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$watermark->transformImageColorspace($this->im->getColorspace()); |
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} |
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if ($watermark->getImageAlphaChannel() !== Imagick::ALPHACHANNEL_ACTIVATE) { |
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// Force the image to have an alpha channel |
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$watermark->setImageAlphaChannel(Imagick::ALPHACHANNEL_OPAQUE); |
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} |
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if ($opacity < 100) { |
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// NOTE: Using setImageOpacity will destroy current alpha channels! |
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$watermark->evaluateImage(Imagick::EVALUATE_MULTIPLY, $opacity / 100, Imagick::CHANNEL_ALPHA); |
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} |
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// Apply the watermark to the image |
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return $this->im->compositeImage($watermark, Imagick::COMPOSITE_DISSOLVE, $offset_x, $offset_y); |
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} |
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public function _do_background($r, $g, $b, $opacity) |
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{ |
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// Create a RGB color for the background |
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$color = sprintf('rgb(%d, %d, %d)', $r, $g, $b); |
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// Create a new image for the background |
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$background = new Imagick; |
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$background->newImage($this->width, $this->height, new ImagickPixel($color)); |
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if (!$background->getImageAlphaChannel()) { |
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// Force the image to have an alpha channel |
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$background->setImageAlphaChannel(Imagick::ALPHACHANNEL_SET); |
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} |
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// Clear the background image |
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$background->setImageBackgroundColor(new ImagickPixel('transparent')); |
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// NOTE: Using setImageOpacity will destroy current alpha channels! |
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$background->evaluateImage(Imagick::EVALUATE_MULTIPLY, $opacity / 100, Imagick::CHANNEL_ALPHA); |
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if ($background->compositeImage($this->im, Imagick::COMPOSITE_DISSOLVE, 0, 0)) { |
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// Replace the current image with the new image |
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$this->im = $background; |
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return true; |
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} |
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return false; |
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} |
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public function _do_save($file, $quality) |
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{ |
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// Get the image format and type |
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list($format, $type) = $this->_get_imagetype(pathinfo($file, PATHINFO_EXTENSION)); |
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// Set the output image type |
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$this->im->setFormat($format); |
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// Set the output quality |
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$this->im->setImageCompressionQuality($quality); |
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// Sets the image compression |
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// progressive jpeg |
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$this->im->setInterlaceScheme(Imagick::INTERLACE_PLANE); |
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if ($this->im->writeImage($file)) { |
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// Reset the image type and mime type |
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$this->type = $type; |
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$this->mime = image_type_to_mime_type($type); |
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return true; |
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} |
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return false; |
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} |
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public function _do_render($type, $quality) |
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{ |
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// Get the image format and type |
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list($format, $type) = $this->_get_imagetype($type); |
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// Set the output image type |
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$this->im->setFormat($format); |
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// Set the output quality |
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$this->im->setImageCompressionQuality($quality); |
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// Reset the image type and mime type |
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$this->type = $type; |
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$this->mime = image_type_to_mime_type($type); |
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return (string)$this->im; |
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} |
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/** |
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* Get the image type and format for an extension. |
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* |
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* @param string $extension image extension: png, jpg, etc |
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* @return array IMAGETYPE_* constant |
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* @throws ErrorException |
344
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*/ |
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public function _get_imagetype($extension) |
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{ |
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// Normalize the extension to a format |
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$format = strtolower($extension); |
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switch ($format) { |
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case 'jpg': |
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case 'jpeg': |
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$type = IMAGETYPE_JPEG; |
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break; |
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case 'gif': |
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$type = IMAGETYPE_GIF; |
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break; |
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case 'png': |
359
|
|
|
$type = IMAGETYPE_PNG; |
360
|
|
|
break; |
361
|
|
|
default: |
362
|
|
|
throw new ErrorException(sprintf('Installed ImageMagick does not support %s images', $extension)); |
363
|
|
|
break; |
364
|
|
|
} |
365
|
|
|
|
366
|
|
|
return [$format, $type]; |
367
|
|
|
} |
368
|
|
|
} // End Kohana_Image_Imagick |
369
|
|
|
|
In the issue above, the returned value is violating the contract defined by the mentioned interface.
Let's take a look at an example: