/usr/share/php/Horde/Image/Effect/Imagick/DropShadow.php is in php-horde-image 2.5.2-1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
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/**
* Copyright 2007-2017 Horde LLC (http://www.horde.org/)
*
* See the enclosed file COPYING for license information (LGPL). If you
* did not receive this file, see http://www.horde.org/licenses/lgpl21.
*
* @author Michael J. Rubinsky <mrubinsk@horde.org>
* @category Horde
* @license http://www.horde.org/licenses/lgpl21 LGPL-2.1
* @package Image
*/
/**
* Image effect for adding a drop shadow.
*
* @author Michael J. Rubinsky <mrubinsk@horde.org>
* @category Horde
* @copyright 2007-2017 Horde LLC
* @license http://www.horde.org/licenses/lgpl21 LGPL-2.1
* @package Image
*/
class Horde_Image_Effect_Imagick_DropShadow extends Horde_Image_Effect
{
/**
* Valid parameters:
*
* @TODO
*
* @var array
*/
protected $_params = array(
'distance' => 5, // This is used as the x and y offset
'width' => 2, // ignored
'hexcolor' => '000000', // ignored
'angle' => 215, // ignored
'fade' => 3, // Sigma value
'padding' => 0,
'background' => 'none'
);
/**
* Applies the effect.
*/
public function apply()
{
// There is what *I* call a bug in the magickwand interface of Im that
// Imagick is compiled against. The X and Y parameters are ignored, and
// the distance of the shadow is determined *solely* by the sigma value
// which makes it pretty much impossible to have Imagick shadows look
// identical to Im shadows...
try {
$shadow = $this->_image->cloneImagickObject();
$shadow->setImageBackgroundColor(new ImagickPixel('black'));
$shadow->shadowImage(
80,
$this->_params['fade'],
$this->_params['distance'],
$this->_params['distance']
);
// If we explicitly request a background color, we need to compose
// an image of the background color with the shadow since the
// shadow is always generated with transparent background.
if ($this->_params['background'] != 'none') {
$size = $shadow->getImageGeometry();
$new = new Imagick();
$new->newImage($size['width'], $size['height'], new ImagickPixel($this->_params['background']));
$new->setImageFormat($this->_image->getType());
$new->compositeImage($shadow, Imagick::COMPOSITE_OVER, 0, 0);
$shadow->clear();
$shadow->addImage($new);
$new->destroy();
}
$shadow->compositeImage(
$this->_image->imagick, Imagick::COMPOSITE_OVER, 0, 0
);
if ($this->_params['padding']) {
$shadow->borderImage(
$this->_params['background'],
$this->_params['padding'],
$this->_params['padding']
);
}
$this->_image->imagick->clear();
$this->_image->imagick->addImage($shadow);
} catch (ImagickPixelException $e) {
throw new Horde_Image_Exception($e);
} catch (ImagickException $e) {
throw new Horde_Image_Exception($e);
}
$shadow->destroy();
$this->_image->clearGeometry();
}
}
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