1: <?php
 2: /**
 3:  * Image effect for adding a drop shadow.
 4:  *
 5:  * Copyright 2007-2012 Horde LLC (http://www.horde.org/)
 6:  *
 7:  * @author  Michael J. Rubinsky <mrubinsk@horde.org>
 8:  * @package Image
 9:  */
10: class Horde_Image_Effect_Imagick_DropShadow extends Horde_Image_Effect
11: {
12:     /**
13:      * Valid parameters: Most are currently ignored for the im version
14:      * of this effect.
15:      *
16:      * @TODO
17:      *
18:      * @var array
19:      */
20:     protected $_params = array('distance' => 5, // This is used as the x and y offset
21:                                'width' => 2,
22:                                'hexcolor' => '000000',
23:                                'angle' => 215,
24:                                'fade' => 3, // Sigma value
25:                                'padding' => 0,
26:                                'background' => 'none');
27: 
28:     /**
29:      * Apply the effect.
30:      *
31:      * @return boolean
32:      */
33:     public function apply()
34:     {
35:         // There is what *I* call a bug in the magickwand interface of Im that
36:         // Imagick is compiled against. The X and Y parameters are ignored, and
37:         // the distance of the shadow is determined *solely* by the sigma value
38:         // which makes it pretty much impossible to have Imagick shadows look
39:         // identical to Im shadows...
40:         $shadow = $this->_image->imagick->clone();
41:         $shadow->setImageBackgroundColor(new ImagickPixel('black'));
42:         $shadow->shadowImage(80, $this->_params['fade'],
43:                              $this->_params['distance'],
44:                              $this->_params['distance']);
45: 
46:         $shadow->compositeImage($this->_image->imagick, Imagick::COMPOSITE_OVER, 0, 0);
47: 
48:         if ($this->_params['padding']) {
49:             $shadow->borderImage($this->_params['background'],
50:                                                 $this->_params['padding'],
51:                                                 $this->_params['padding']);
52:         }
53:         $this->_image->imagick->clear();
54:         $this->_image->imagick->addImage($shadow);
55:         $shadow->destroy();
56: 
57:         $this->_image->clearGeometry();
58: 
59:         return true;
60:     }
61: 
62: }