<?php
define("IMG_BLOCK_ULX",0);
define("IMG_BLOCK_ULY",1);
define("IMG_BLOCK_URX",2);
define("IMG_BLOCK_URY",3);
define("IMG_BLOCK_ORX",4);
define("IMG_BLOCK_ORY",5);
define("IMG_BLOCK_OLX",6);
define("IMG_BLOCK_OLY",7);

class CImageGenerator
{
	function CImageGenerator()
	{
		$this->msFontPath=str_replace("\\","/",dirname(__FILE__))."/ttf/";
		$this->masFonts["arial"]=$this->msFontPath."arial.ttf";
		$this->masFonts["cour"]=$this->msFontPath."arial.ttf";
		$this->masFonts["rotis"]=$this->msFontPath."arial.ttf";
	}
	function generateRandomKey($lLength)
	{
		for($i=0;$i<$lLength;$i++)
		{
			$asReturn[]=chr(mt_rand(65,90));
		}
		return join($asReturn);
	}
	function generateRandomKeyImage($sRandomKey=false)
	{
		if($sRandomKey===false)
			 $sRandomKey=$this->generateRandomKey(10);
		$this->pImage=imagecreate(400,80);
		$white=imagecolorallocate($this->pImage,255,255,255);
		$black=imagecolorallocate($this->pImage,0,0,0);
		$xPos=10;
		$size=20;
		$yPos=30;
		for($i=0;$i<strlen($sRandomKey);$i++)
		{
			$sFontPath=$this->masFonts[$this->getRandomFont()];
			$angle=mt_rand(-10,10);
			 
			$char=substr($sRandomKey,$i,1);
			if(!$asDataOf=@imagettfbbox($size,$angle,$sFontPath,$char))
			{
				return false;
			}
			
			if(!@imagettftext($this->pImage,$size,$angle,$xPos,$yPos,$this->getRandomCol(),$sFontPath,$char))
			{
				return false;
			}
			$xAdd=abs(max(abs($asDataOf[IMG_BLOCK_URX])+abs($asDataOf[IMG_BLOCK_ULX]),abs($asDataOf[IMG_BLOCK_ORX])+abs($asDataOf[IMG_BLOCK_OLX])));
			$xPos+=$xAdd;
		}
	
	}
	function PNG()
	{
		imagepng($this->pImage);//,"c:/test.png");
	}
	function getRandomCol()
	{
		$a=mt_rand(0,50);
		$b=mt_rand(0,100);
		$upper=max($a,$b);
		$lower=min($a,$b);
		return imagecolorallocate($this->pImage,mt_rand(10,200),mt_rand(10,200),mt_rand(10,200));
	}
	function getRandomFont()
	{
		$asFont[0]="rotis";
		$asFont[1]="arial";
		return "arial";
		
		return $asFont[mt_rand(0,1)];
	}
}?>