<?php
header('Content-Type: image/png');

if(!isset($_SESSION)) session_start();

$captchalen=5;
$captchax=rand(1,100);
$captchay=rand(1,35);
$captchastring="";
$origin="";

$charset=str_split("ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz123456789");
for($i=0; $i<$captchalen; $i++) {
	$char=$charset[rand(0, (count($charset)-1))];
	$captchastring.=$char." ";
	$origin.=$char;
}
$_SESSION['CAPTCHA']=$origin;


//imagettftext 

$im = imagecreatetruecolor(250,100);

//Get the list of images
$dir=opendir("./Images");
$image_array = array();
$ac = 0;

while(($curr=readdir($dir)) != false) {

if ($curr == ".." || $curr == ".")
continue;

if(is_file("./Images/" . $curr)) {
$image_array[$ac] = $curr;
$ac++;
}
}
closedir($dir);


//Get the list of fonts
$dir=opendir("./Fonts");
$font_array = array();
$ac = 0;

while(($curr=readdir($dir)) != false) {

if ($curr == ".." || $curr == ".")
continue;

if(is_file("./Fonts/" . $curr)) {
$font_array[$ac] = $curr;
$ac++;
}
}
closedir($dir);


$image_file = $image_array[rand(0,count($image_array) - 1)];

$bg_im = imagecreatefromjpeg("./Images/" . $image_file);

$width = imagesx($bg_im);
$height = imagesy($bg_im);

$src_x = rand(0, $width - 250);
$src_y = rand(0, $height - 100);

imagecopyresampled($im, $bg_im, 0, 0, $src_x, $src_y, 250, 100, 250, 100);

$r_c = array();
$g_c = array();
$b_c = array();

for ($i = 1; $i <= 5; $i++)
{

$x_pos = rand(($i - 1) * 50 + 10, $i * 40);

$y_pos = rand(40, 80);

$r = 0;
$g = 0;
$b = 0;

for ($x=0; $x<=2; $x++)
{
for ($y=0; $y<=2; $y++)
{
$rgb = imagecolorat($im, $x_pos + 12 + ($x * 2), $y_pos - 15 + ($y * 2));
$r += ($rgb >> 16) & 0xFF;
$g += ($rgb >> 8) & 0xFF;
$b += $rgb & 0xFF;
}
}


$r = -($r / 9) + 255;
$g = -($g / 9) + 255;
$b = -($b / 9) + 255;

$slashcolour = imagecolorallocate($im, $r, $g, $b);
imageline($im, rand(0, 250), 0, rand(0, 250), 100, $slashcolour);

//$rgb = imagecolorat($im, $x_pos + 8 + ($x * 2), $y_pos + 10 + ($y * 2));
//$r = -(($rgb >> 16) & 0xFF) + 255;
//$g = -(($rgb >> 8) & 0xFF) + 255;
//$b = -($rgb & 0xFF) + 255;


if ($r + $g + $b < 383)
{
$r -= 30;
$g -= 30;
$b -= 30;
} else {
$r += 30;
$g += 30;
$b += 30;
}

if ($r > 255)
$r = 255;
if ($g > 255)
$g = 255;
if ($b > 255)
$b = 255;

if ($r < 0)
$r = 0;
if ($g < 0)
$g = 0;
if ($b < 0)
$b = 0;

if ($r + $g + $b > 250 && $r + $g + $b < 550 && abs((($r + $g + $b) / 3) - $r) < 50 && abs((($r + $g + $b) / 3) - $g) < 50 && abs((($r + $g + $b) / 3) - $b) < 50)
{
if ($r + $g + $b < 383)
{
$r -= 70;
$g -= 70;
$b -= 70;
} else {
$r += 70;
$g += 70;
$b += 70;
}
}

$r_c[$i - 1] = $r;
$g_c[$i - 1] = $g;
$b_c[$i - 1] = $b;

$textcolor=imagecolorallocate($im, $r, $g, $b);


$font_file = "./Fonts/" . $font_array[rand(0,count($font_array) - 1)];

imagettftext($im, rand(26, 32), rand(-30, 30), $x_pos, $y_pos, $textcolor, $font_file, substr($origin, $i - 1, 1));

}


for ($i = 0; $i <= 4; $i++)
{
if (rand(0,1) == 0)
continue;

$slashcolour = imagecolorallocate($im, $r_c[$i], $g_c[$i], $b_c[$i]);
imageline($im, rand(0, 250), 0, rand(0, 250), 100, $slashcolour);
}

imagepng($im);
?>