<?php
require_once("DMT-captcha-config.php");

class DMTcaptcha{

 function DMTcaptcha(){
 require(dirname(__FILE__).'/DMT-captcha-config.php');
			while(true){
				$this->keystring='';
				for($i=0;$i<$length;$i++)
					$this->keystring.=$use_symbols{mt_rand(0,$use_symbols_len-1)};
				if(!preg_match('/cb|rn|rm|mm|co|do|db|qp|qb|dp|ww/', $this->keystring)) break;
			}
			$im=imagecreatefrompng(dirname(__FILE__)."/DMT_captcha_fonts/back".mt_rand(1,$back_count).".png");
   			$border_color = imagecolorallocate($im, 255, 0, 0);
			$width = imagesx($im);
			$height = imagesy($im);
			
			$font_color = imagecolorresolve($im, $scolor[$simbol_color][0], $scolor[$simbol_color][1],$scolor[$simbol_color][2]);
   			//imagerectangle($im, 0,0,IMAGESX($im)-1,imagesy($im)-1 , $border_color);//$this->$border_color
   			$angle=0;
			$px=$margin_left;
			if ($inline){
			imagettftext($im, mt_rand($font_size_min,$font_size_max),$angle, $px, $margin_top, $font_color,dirname(__FILE__)."/DMT_captcha_fonts/font".mt_rand(1,$font_count).".ttf",$this->keystring);
			} else
			For($i=0;$i<$length;$i++){
									if ($rotate_simbol){
    									$angle=mt_rand(-30,30);
    									if ($angle<0) $angle=360+$angle;
									}
									imagettftext($im, mt_rand($font_size_min,$font_size_max),$angle, $px, $margin_top, $font_color,dirname(__FILE__)."/DMT_captcha_fonts/font".mt_rand(1,$font_count).".ttf",$this->keystring[$i]);
   									$px+=$font_width+mt_rand($rand_bsimb_min,$rand_bsimb_max); 
									}
		$rand=mt_rand(0,1);
		if ($rand)$rand=-1; else $rand=1;
		image_make_pomexi($im,$font_size_min,$shum_count);
		//$im=ImageSkew($im,$im,mt_rand(-10,10),mt_rand(0,360));
		wave_region($im,0,0,$width,$height,$rand*mt_rand($amplitude_min,$amplitude_max),mt_rand(40,50));
		header('Expires: Sat, 17 May 2008 05:00:00 GMT'); 
		header("Last-Modified: " . gmdate("D, d M Y H:i:s") . " GMT");
		header('Cache-Control: no-store, no-cache, must-revalidate'); 
		header('Cache-Control: post-check=0, pre-check=0', FALSE); 
		header('Pragma: no-cache');  
		if(function_exists("imagepng")){
			header("Content-Type: image/x-png");
			imagepng($im);
		}else if(function_exists("imagegif")){
			header("Content-Type: image/gif");
			imagegif($im);
		}elseif(function_exists("imagejpeg")){
			header("Content-Type: image/jpeg");
			imagejpeg($im, null, $jpeg_quality);
		}
 }
 	function getKeyString(){
		return $this->keystring;
	}
}

function image_make_pomexi(&$im,$size,$colch){
   $max_x=imagesx($im);
   $max_y=imagesy($im);
	for ($i=0;$i<$colch;$i++){
	$size=mt_rand(10,$size);
				$px1=mt_rand(0,$max_x);
				$py1=mt_rand(0,$max_y);
				$col=imagecolorresolve($im, rand(1,255), rand(1,255), rand(1,255)); 
				$pk1=mt_rand(0,1);
				if ($pk1===0)$pk1=-1; else $pk1=1;
				$pk2=mt_rand(0,1);
				if ($pk2===0)$pk2=-1; else $pk2=1;
				switch (mt_rand(1,3)){
    				case 1: imagerectangle($im,$px1,$py1,$px1+$size*$pk1,$py1+$size*$pk2,$col); break;
    				case 2: imageline($im,$px1,$py1,$px1+$size*$pk1,$py1+$size*$pk2,$col); break;
    				case 3: imageellipse($im,$px1,$py1,$size*$pk1,$size*$pk2,$col); break;
				}
			}	
	}

function wave_region($img, $x, $y, $width, $height,$amplitude = 4.5,$period = 30){
        $mult = 2;
        $img2 = imagecreatetruecolor($width * $mult, $height * $mult);
        imagecopyresampled ($img2,$img,0,0,$x,$y,$width * $mult,$height * $mult,$width, $height);
        for ($i = 0;$i < ($width * $mult);$i += 2)
           imagecopy($img2,$img2,$x + $i - 2,$y + sin($i / $period) * $amplitude,$x + $i,$y, 2,($height * $mult));
        imagecopyresampled($img,$img2,$x,$y,0,0,$width, $height,$width * $mult,$height * $mult);
        imagedestroy($img2);
 }
 
 function ImageSkew($pImage,$iSource, $pAngle, $pDirection = 0) {  
  // Source image  
  $width = imagesx($pImage);
  $height = imagesy($pImage); 
  $iCanvas = @imagecreate($width, $height);  
  $cCyan = imagecolorallocate($iCanvas, 255, 255, 255);  
  imagefill($iCanvas, 0, 0, $cCyan);  
  $diff = ($pAngle / 90);  
  $currentHeight = $height;  
  $currentY = 0; 
  if ($pDirection == 1) { 
    $currentHeight = 0;  
    $currentY = $height; 
  } 
  for ($i = 0; $i < $width; $i++) {  
    if ($pDirection == 0) { 
      imagecopyresampled($iCanvas, $iSource, $i, $currentY, $i, 0, 1, $currentHeight, 1, $height);  
    } else { 
      imagecopyresampled($iCanvas, $iSource, ($width - $i), $currentY, ($width - $i), 0, 1, $currentHeight, 1, $height);  
    } 
    if ($pDirection == 0) { 
      $currentHeight = $currentHeight - ($diff * 2);  
      $currentY = ($height - $currentHeight) / 2;  
    } else { 
      $currentHeight = $height - ( $i * ($diff * 2) ); 
      $currentY = ($height - $currentHeight) / 2;  
    } 
  }
  return $iCanvas;  
} 
 
?>