Initial Kohana install

[speedfreak] / Server / system / libraries / drivers / Captcha / Black.php

diff --git a/Server/system/libraries/drivers/Captcha/Black.php b/Server/system/libraries/drivers/Captcha/Black.php
new file mode 100644 (file)
index 0000000..6a2e222
--- /dev/null
+++ b/Server/system/libraries/drivers/Captcha/Black.php
@@ -0,0 +1,72 @@
+<?php defined('SYSPATH') OR die('No direct access allowed.');
+/**
+ * Captcha driver for "black" style.
+ *
+ * $Id: Black.php 3769 2008-12-15 00:48:56Z zombor $
+ *
+ * @package    Captcha
+ * @author     Kohana Team
+ * @copyright  (c) 2007-2008 Kohana Team
+ * @license    http://kohanaphp.com/license.html
+ */
+class Captcha_Black_Driver extends Captcha_Driver {
+
+       /**
+        * Generates a new Captcha challenge.
+        *
+        * @return  string  the challenge answer
+        */
+       public function generate_challenge()
+       {
+               // Complexity setting is used as character count
+               return text::random('distinct', max(1, ceil(Captcha::$config['complexity'] / 1.5)));
+       }
+
+       /**
+        * Outputs the Captcha image.
+        *
+        * @param   boolean  html output
+        * @return  mixed
+        */
+       public function render($html)
+       {
+               // Creates a black image to start from
+               $this->image_create(Captcha::$config['background']);
+
+               // Add random white/gray arcs, amount depends on complexity setting
+               $count = (Captcha::$config['width'] + Captcha::$config['height']) / 2;
+               $count = $count / 5 * min(10, Captcha::$config['complexity']);
+               for ($i = 0; $i < $count; $i++)
+               {
+                       imagesetthickness($this->image, mt_rand(1, 2));
+                       $color = imagecolorallocatealpha($this->image, 255, 255, 255, mt_rand(0, 120));
+                       imagearc($this->image, mt_rand(-Captcha::$config['width'], Captcha::$config['width']), mt_rand(-Captcha::$config['height'], Captcha::$config['height']), mt_rand(-Captcha::$config['width'], Captcha::$config['width']), mt_rand(-Captcha::$config['height'], Captcha::$config['height']), mt_rand(0, 360), mt_rand(0, 360), $color);
+               }
+
+               // Use different fonts if available
+               $font = Captcha::$config['fontpath'].Captcha::$config['fonts'][array_rand(Captcha::$config['fonts'])];
+
+               // Draw the character's white shadows
+               $size = (int) min(Captcha::$config['height'] / 2, Captcha::$config['width'] * 0.8 / strlen($this->response));
+               $angle = mt_rand(-15 + strlen($this->response), 15 - strlen($this->response));
+               $x = mt_rand(1, Captcha::$config['width'] * 0.9 - $size * strlen($this->response));
+               $y = ((Captcha::$config['height'] - $size) / 2) + $size;
+               $color = imagecolorallocate($this->image, 255, 255, 255);
+               imagefttext($this->image, $size, $angle, $x + 1, $y + 1, $color, $font, $this->response);
+
+               // Add more shadows for lower complexities
+               (Captcha::$config['complexity'] < 10) and imagefttext($this->image, $size, $angle, $x - 1, $y - 1, $color, $font , $this->response);
+               (Captcha::$config['complexity'] < 8)  and imagefttext($this->image, $size, $angle, $x - 2, $y + 2, $color, $font , $this->response);
+               (Captcha::$config['complexity'] < 6)  and imagefttext($this->image, $size, $angle, $x + 2, $y - 2, $color, $font , $this->response);
+               (Captcha::$config['complexity'] < 4)  and imagefttext($this->image, $size, $angle, $x + 3, $y + 3, $color, $font , $this->response);
+               (Captcha::$config['complexity'] < 2)  and imagefttext($this->image, $size, $angle, $x - 3, $y - 3, $color, $font , $this->response);
+
+               // Finally draw the foreground characters
+               $color = imagecolorallocate($this->image, 0, 0, 0);
+               imagefttext($this->image, $size, $angle, $x, $y, $color, $font, $this->response);
+
+               // Output
+               return $this->image_render($html);
+       }
+
+} // End Captcha Black Driver Class
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