<?php

/**

 * Zend Framework

 *

 * LICENSE

 *

 * This source file is subject to the new BSD license that is bundled

 * with this package in the file LICENSE.txt.

 * It is also available through the world-wide-web at this URL:

 * http://framework.zend.com/license/new-bsd

 * If you did not receive a copy of the license and are unable to

 * obtain it through the world-wide-web, please send an email

 * to license@zend.com so we can send you a copy immediately.

 *

 * @category   Zend

 * @package    Zend_Pdf

 * @copyright  Copyright (c) 2005-2012 Zend Technologies USA Inc. (http://www.zend.com)

 * @license    http://framework.zend.com/license/new-bsd     New BSD License

 * @version    $Id: Color.php 24593 2012-01-05 20:35:02Z matthew $

 */

/**

 * PDF provides a powerfull facilities for specifying the colors of graphics objects.

 * This class encapsulates color behaviour.

 *

 * Some colors interact with PDF document (create additional objects in a PDF),

 * others don't do it. That is defined in a subclasses.

 *

 * @package    Zend_Pdf

 * @copyright  Copyright (c) 2005-2012 Zend Technologies USA Inc. (http://www.zend.com)

 * @license    http://framework.zend.com/license/new-bsd     New BSD License

 */

abstract class Zend_Pdf_Color

{

    /**

     * Instructions, which can be directly inserted into content stream

     * to switch color.

     * Color set instructions differ for stroking and nonstroking operations.

     *

     * @param boolean $stroking

     * @return string

     */

    abstract public function instructions($stroking);

    /**

     * Get color components (color space dependent)

     *

     * @return array

     */

    abstract public function getComponents();

}