<?php

// $Id: ttf_image.php 915 2009-01-21 19:27:01Z Ruebenwurzel $

/*

 Website Baker Project <http://www.websitebaker.org/>
 Copyright (C) 2004-2009, Ryan Djurovich

 Website Baker is free software; you can redistribute it and/or modify
 it under the terms of the GNU General Public License as published by
 the Free Software Foundation; either version 2 of the License, or
 (at your option) any later version.

 Website Baker is distributed in the hope that it will be useful,
 but WITHOUT ANY WARRANTY; without even the implied warranty of
 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 GNU General Public License for more details.

 You should have received a copy of the GNU General Public License
 along with Website Baker; if not, write to the Free Software
 Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA

*/

require_once("../../../config.php");
require_once(WB_PATH.'/include/captcha/captcha.php');

if(!isset($_SESSION['captcha_time']))
	exit;
unset($_SESSION['captcha_time']);

// get lists of fonts and backgrounds
require_once(WB_PATH.'/framework/functions.php');
$t_fonts = file_list(WB_PATH.'/include/captcha/fonts');
$t_bgs = file_list(WB_PATH.'/include/captcha/backgrounds');
$fonts = array();
$bgs = array();
foreach($t_fonts as $file) if(eregi('\.ttf$',$file)) $fonts[]=$file;
foreach($t_bgs as $file) if(eregi('\.png$',$file)) $bgs[]=$file;

// make random string
if(!function_exists('randomString')) {
	function randomString($len) {
		list($usec, $sec) = explode(' ', microtime());
		mt_srand((float)$sec + ((float)$usec * 100000));
		//$possible="ABCDEFGHJKLMNPRSTUVWXYZabcdefghkmnpqrstuvwxyz23456789";
		$possible="abdfhkrsvwxz23456789";
		$str="";
		while(strlen($str)<$len) {
			$str.=substr($possible,(mt_rand()%(strlen($possible))),1);
		}
		return($str);
	}
}
$text = randomString(5); // number of characters
$_SESSION['captcha'] = $text; 

// choose a font and background
$font = $fonts[array_rand($fonts)];
$bg = $bgs[array_rand($bgs)];
// get image-dimensions
list($width, $height, $type, $attr) = getimagesize($bg);

// create reload-image
$reload = ImageCreateFromPNG(WB_PATH.'/include/captcha/reload_140_40.png'); // reload-overlay

if(mt_rand(0,2)==0) { // 1 out of 3

	// draw each character individualy
	$image = ImageCreateFromPNG($bg); // background image
	$grey = mt_rand(0,50);
	$color = ImageColorAllocate($image, $grey, $grey, $grey); // font-color
	$ttf = $font;
	$ttfsize = 25; // fontsize
	$count = 0;
	$image_failed = true;
	$angle = mt_rand(-15,15);
	$x = mt_rand(10,25);
	$y = mt_rand($height-10,$height-2);
	do {
		for($i=0;$i<strlen($text);$i++) {
			$res = imagettftext($image, $ttfsize, $angle, $x, $y, $color, $ttf, $text{$i});
			$angle = mt_rand(-15,15);
			$x = mt_rand($res[4],$res[4]+10);
			$y = mt_rand($height-15,$height-5);
		}
		if($res[4] > $width) {
			$image_failed = true;
		} else {
			$image_failed = false;
		}
		if(++$count > 4) // too many tries! Use the image
			break;
	} while($image_failed);
	
} else {
	
	// draw whole string at once
	$image_failed = true;
	$count=0;
	do {
		$image = ImageCreateFromPNG($bg); // background image
		$grey = mt_rand(0,50);
		$color = ImageColorAllocate($image, $grey, $grey, $grey); // font-color
		$ttf = $font;
		$ttfsize = 25; // fontsize
		$angle = mt_rand(0,5);
		$x = mt_rand(5,30);
		$y = mt_rand($height-10,$height-2);
		$res = imagettftext($image, $ttfsize, $angle, $x, $y, $color, $ttf, $text);
		// check if text fits into the image
		if(($res[0]>0 && $res[0]<$width) && ($res[1]>0 && $res[1]<$height) && 
			 ($res[2]>0 && $res[2]<$width) && ($res[3]>0 && $res[3]<$height) && 
			 ($res[4]>0 && $res[4]<$width) && ($res[5]>0 && $res[5]<$height) && 
			 ($res[6]>0 && $res[6]<$width) && ($res[7]>0 && $res[7]<$height)
		) {
			$image_failed = false;
		}
		if(++$count > 4) // too many tries! Use the image
			break;
	} while($image_failed);
	
}

imagealphablending($reload, TRUE);
imagesavealpha($reload, TRUE);

// overlay
imagecopy($reload, $image, 0,0,0,0, 140,40);
imagedestroy($image);
$image = $reload;

captcha_header();
ob_start();
imagepng($image);
header("Content-Length: ".ob_get_length()); 
ob_end_flush();
imagedestroy($image);

?>