GrayScale.php

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<?php
#require_once 'Zend/Pdf/Element/Numeric.php';


#require_once 'Zend/Pdf/Color.php';

class Zend_Pdf_Color_GrayScale extends Zend_Pdf_Color
{
    private $_grayLevel;

    public function __construct($grayLevel)
    {
        if ($grayLevel < 0) { $grayLevel = 0; }
        if ($grayLevel > 1) { $grayLevel = 1; }

        $this->_grayLevel = new Zend_Pdf_Element_Numeric($grayLevel);
    }

    public function instructions($stroking)
    {
        return $this->_grayLevel->toString() . ($stroking? " G\n" : " g\n");
    }

    public function getComponents()
    {
        return array($this->_grayLevel->value);
    }
}