1: <?php
 2: /**
 3:  * Simple composite effect for composing multiple images. This effect assumes
 4:  * that all images being passed in are already the desired size.
 5:  *
 6:  * Copyright 2009-2012 Horde LLC (http://www.horde.org/)
 7:  *
 8:  * @author  Michael J. Rubinsky <mrubinsk@horde.org>
 9:  * @package Image
10:  */
11: class Horde_Image_Effect_Imagick_Composite extends Horde_Image_Effect
12: {
13:     /**
14:      * Valid parameters for border effects:
15:      *
16:      * 'images'  - an array of Horde_Image objects to overlay.
17:      *
18:      *  ...and ONE of the following. If both are provided, the behaviour is
19:      *  undefined.
20:      *
21:      * 'gravity'    - the ImageMagick gravity constant describing placement
22:      *                (IM driver only so far, not imagick)
23:      *
24:      * 'x' and 'y'  - coordinates for the overlay placement.
25:      *
26:      * @var array
27:      */
28:     protected $_params = array();
29: 
30:     /**
31:      * Draw the border.
32:      *
33:      * This draws the configured border to the provided image. Beware,
34:      * that every pixel inside the border clipping will be overwritten
35:      * with the background color.
36:      */
37:     public function apply()
38:     {
39:         foreach ($this->_params['images'] as $image) {
40:             $topimg = new Imagick();
41:             $topimg->clear();
42:             $topimg->readImageBlob($image->raw());
43: 
44:             /* Calculate center for composite (gravity center)*/
45:             $geometry = $this->_image->imagick->getImageGeometry();
46:             $x = $geometry['width'] / 2;
47:             $y = $geometry['height'] / 2;
48: 
49:             if (isset($this->_params['x']) && isset($this->_params['y'])) {
50:                 $x = $this->_params['x'];
51:                 $y = $this->_params['y'];
52:             }
53:             $this->_image->_imagick->compositeImage($topimg, Imagick::COMPOSITE_OVER, $x, $y);
54:         }
55:         return true;
56:     }
57: 
58: }