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<?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) 2005-2010 Zend Technologies USA Inc. (http://www.zend.com)
* @license http://framework.zend.com/license/new-bsd New BSD License
* @version $Id: GrayScale.php 20096 2010-01-06 02:05:09Z bkarwin $
*/
/** Internally used classes */
require_once 'Zend/Pdf/Element/Numeric.php';
/** Zend_Pdf_Color */
require_once 'Zend/Pdf/Color.php';
/**
* GrayScale color implementation
*
* @category Zend
* @package Zend_Pdf
* @copyright Copyright (c) 2005-2010 Zend Technologies USA Inc. (http://www.zend.com)
* @license http://framework.zend.com/license/new-bsd New BSD License
*/
class Zend_Pdf_Color_GrayScale extends Zend_Pdf_Color
{
/**
* GrayLevel.
* 0.0 (black) - 1.0 (white)
*
* @var Zend_Pdf_Element_Numeric
*/
private $_grayLevel;
/**
* Object constructor
*
* @param float $grayLevel
*/
public function __construct($grayLevel)
{
if ($grayLevel < 0) { $grayLevel = 0; }
if ($grayLevel > 1) { $grayLevel = 1; }
$this->_grayLevel = new Zend_Pdf_Element_Numeric($grayLevel);
}
/**
* Instructions, which can be directly inserted into content stream
* to switch color.
* Color set instructions differ for stroking and nonstroking operations.
*
* @param boolean $stroking
* @return string
*/
public function instructions($stroking)
{
return $this->_grayLevel->toString() . ($stroking? " G\n" : " g\n");
}
/**
* Get color components (color space dependent)
*
* @return array
*/
public function getComponents()
{
return array($this->_grayLevel->value);
}
}
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