+ $policy_modules = array('policy_entropy', 'policy_occlude', 'policy_3dbitmap', 'policy_shape');

+ *

+ */

+ function draw_shape($type, $img, $x_min, $y_min, $x_max, $y_max, $color)

+ {

+ switch ($type)

+ {

+ case 'Square':

+ imagefilledpolygon($img, array($x_min, $y_max, $x_min, $y_min, $x_max, $y_min, $x_max, $y_max), 4, $color);

+ break;

+

+ case 'TriangleUp':

+ imagefilledpolygon($img, array($x_min, $y_max, ($x_min + $x_max) / 2, $y_min, $x_max, $y_max), 3, $color);

+ break;

+

+ case 'TriangleDown':

+ imagefilledpolygon($img, array($x_min, $y_min, ($x_min + $x_max) / 2, $y_max, $x_max, $y_min), 3, $color);

+ break;

+

+ case 'Circle':

+ imagefilledellipse($img, ($x_min + $x_max) / 2, ($y_min + $y_max) / 2, $x_max - $x_min, $y_max - $y_min, $color);

+ break;

+ }

+ }

+

+ /**

+ *

+ */

+ function draw_pattern($seed, $img, $x_min, $y_min, $x_max, $y_max, $colors, $thickness = 1)

+ {

+ $x_size = ($x_max - $x_min) / 4;

+ $y_size = ($y_max - $y_min) / 4;

+ $bitmap = substr($seed, 16, 4);

+ $numcolors = sizeof($colors) - 1;

+ for ($y = 0; $y < 4; ++$y)

+ {

+ $map = hexdec(substr($bitmap, $y, 1));

+ for ($x = 0; $x < 4; ++$x)

+ {

+ if ($map & (1 << $x))

+ {

+ $char = hexdec(substr($seed, ($y * 4) + $x, 1));

+ if (!($char >> 2))

+ {

+ switch ($char % 4)

+ {

+ case 0:

+ $shape = 'Circle';

+ break;

+

+ case 1:

+ $shape = 'Square';

+ break;

+

+ case 2:

+ $shape = 'TriangleUp';

+ break;

+

+ case 3:

+ $shape = 'TriangleDown';

+ break;

+ }

+ $this->draw_shape($shape, $img, $x_min + ($x * $x_size), $y_min + ($y * $y_size), $x_min + (($x + 1) * $x_size), $y_min + (($y + 1) * $y_size), $colors[array_rand($colors)]);

+ }

+ }

+ }

+ }

+

+ $cells = array();

+ for ($i = 0; $i < 6; ++$i)

+ {

+ $cells = hexdec(substr($seed, 20 + ($i * 2), 2));

+ $x1 = $cells % 4;

+ $cells = $cells >> 2;

+ $y1 = $cells % 4;

+ $cells = $cells >> 2;

+ $x2 = $cells % 4;

+ $cells = $cells >> 2;

+ $y2 = $cells % 4;

+ $x1_real = $x_min + (($x1 + 0.5) * $x_size);

+ $y1_real = $y_min + (($y1 + 0.5) * $y_size);

+ $x2_real = $x_min + (($x2 + 0.5) * $x_size);

+ $y2_real = $y_min + (($y2 + 0.5) * $y_size);

+ if ($thickness > 1)

+ {

+ imagesetthickness($img,$thickness);

+ }

+ imageline($img, $x1_real, $y1_real, $x2_real, $y2_real, $colors[array_rand($colors)]);

+ if ($thickness > 1)

+ {

+ imagesetthickness($img, 1);

+ }

+ }

+ }

+

+ /**

+ *

+ */

+ function get_char_string()

+ {

+ static $chars = false;

+ static $charcount = 0;

+ if (!$chars)

+ {

+ $chars = array_merge(range('A', 'Z'), range('1', '9'));

+ $charcount = sizeof($chars) - 1;

+ }

+ $word = '';

+ for ($i = mt_rand(6, 8); $i > 0; --$i)

+ {

+ $word .= $chars[mt_rand(0, $charcount)];

+ }

+ return $word;

+ }

+

+ /**

+ * shape

+ */

+ function policy_shape($code)

+ {

+ global $config;

+ // Generate image

+ $img_x = 800;

+ $img_y = 250;

+ $img = imagecreate($img_x, $img_y);

+

+ // Generate colors

+ $background = imagecolorallocate($img, mt_rand(155, 255), mt_rand(155, 255), mt_rand(155, 255));

+ imagefill($img, 0, 0, $background);

+

+ $random = array();

+ $fontcolors = array();

+ for ($i = 0; $i < 15; $i++)

+ {

+ $random[$i] = imagecolorallocate($img, mt_rand(0, 255), mt_rand(0, 255), mt_rand(0, 255));

+ $fontcolors[$i] = imagecolorallocate($img, mt_rand(0, 120), mt_rand(0, 120), mt_rand(0, 120));

+ }

+

+ // Generate code characters

+ $characters = array();

+ $sizes = array();

+ $bounding_boxes = array();

+ $width_avail = $img_x;

+ $code_num = sizeof($code);

+

+ // Add some line noise

+ if ($config['policy_shape_noise_line'])

+ {

+ $this->noise_line($img, 0, 0, $img_x, $img_y, $background, $fontcolors, $random);

+ }

+

+ $real = mt_rand(0, 3);

+ $patterns = array('', '', '', '');

+ for ($i = 32; $i > 0; --$i)

+ {

+ $patterns[$i % 4] .= str_pad(dechex(mt_rand(0, 65535)), 4, '0', STR_PAD_LEFT);

+ }

+

+ $char_class = $this->captcha_char('char_ttf');

+ for ($i = 0; $i < 4; ++$i)

+ {

+ if ($i)

+ {

+ $y = 5 + ($i * 60);

+ imageline($img, 550, $y, 650, $y, $fontcolors[0]);

+ }

+ $this->draw_pattern($patterns[$i], $img, 525, 10 + ($i * 60), 575, ($i + 1) * 60, $fontcolors);

+ if ($i == $real)

+ {

+ $this->draw_pattern($patterns[$i], $img, 25, 25, 225, 225, $fontcolors, 3);

+ for ($j = 0; $j < $code_num; ++$j)

+ {

+ $character = new $char_class($code[$j]);

+ $character->drawchar(25, 600 + ($j * 25), 35 + ($i * 60), $img, $background, $fontcolors);

+ }

+ }

+ else

+ {

+ $word = $this->get_char_string();

+ for ($j = strlen($word) - 1; $j >= 0; --$j)

+ {

+ $character = new $char_class(substr($word, $j, 1));

+ $character->drawchar(25, 600 + ($j * 25), 35 + ($i * 60), $img, $background, $fontcolors);

+ }

+ }

+ }

+

+ global $user;

+ imagestring($img, 6, 250, 50, $user->lang['CAPTCHA_LINE_1'], $fontcolors[0]);

+ imagestring($img, 6, 250, 100, $user->lang['CAPTCHA_LINE_2'], $fontcolors[0]);

+ imagestring($img, 6, 250, 150, $user->lang['CAPTCHA_LINE_3'], $fontcolors[0]);

+ imagestring($img, 6, 250, 200, $user->lang['CAPTCHA_LINE_4'], $fontcolors[0]);

+

+

+ // Add some pixel noise

+ if ($config['policy_shape_noise_pixel'])

+ {

+ $this->noise_pixel($img, 0, 0, $img_x, $img_y, $background, $fontcolors, $random, $config['policy_shape_noise_pixel']);

+ }

+

+ // Send image

+ $this->send_image($img);

+ }

+

+ /**

+ for ($i = 0; $i < $code_num; ++$i)

+ $code_num = sizeof($code);

+ for ($i = 0; $i < $code_num; ++$i)

+ for ($i = 0; $i < $code_num; ++$i)