77 lines
2.0 KiB
PHP
77 lines
2.0 KiB
PHP
<?php
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/**
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* Zend Framework
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*
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* LICENSE
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*
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* This source file is subject to the new BSD license that is bundled
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* with this package in the file LICENSE.txt.
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* It is also available through the world-wide-web at this URL:
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* http://framework.zend.com/license/new-bsd
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* If you did not receive a copy of the license and are unable to
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* obtain it through the world-wide-web, please send an email
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* to license@zend.com so we can send you a copy immediately.
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*
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* @category Zend
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* @package Zend_Pdf
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* @copyright Copyright (c) 2005-2008 Zend Technologies USA Inc. (http://www.zend.com)
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* @license http://framework.zend.com/license/new-bsd New BSD License
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*/
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/** Zend_Pdf_Color */
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require_once 'Zend/Pdf/Color.php';
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/** Zend_Pdf_Element_Numeric */
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require_once 'Zend/Pdf/Element/Numeric.php';
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/**
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* GrayScale color implementation
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*
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* @category Zend
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* @package Zend_Pdf
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* @copyright Copyright (c) 2005-2008 Zend Technologies USA Inc. (http://www.zend.com)
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* @license http://framework.zend.com/license/new-bsd New BSD License
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*/
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class Zend_Pdf_Color_GrayScale extends Zend_Pdf_Color
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{
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/**
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* GrayLevel.
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* 0.0 (black) - 1.0 (white)
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*
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* @var Zend_Pdf_Element_Numeric
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*/
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private $_grayLevel;
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/**
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* Object constructor
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*
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* @param float $grayLevel
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*/
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public function __construct($grayLevel)
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{
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$this->_grayLevel = new Zend_Pdf_Element_Numeric($grayLevel);
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if ($this->_grayLevel->value < 0) {
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$this->_grayLevel->value = 0;
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}
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if ($this->_grayLevel->value > 1) {
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$this->_grayLevel->value = 1;
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}
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}
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/**
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* Instructions, which can be directly inserted into content stream
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* to switch color.
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* Color set instructions differ for stroking and nonstroking operations.
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*
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* @param boolean $stroking
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* @return string
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*/
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public function instructions($stroking)
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{
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return $this->_grayLevel->toString() . ($stroking? " G\n" : " g\n");
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}
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}
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