includes/captcha/engine_potpourri.php
author Dan
Wed, 26 Mar 2008 02:56:23 -0400
changeset 509 175df10e0b56
parent 507 586fd7d3202d
child 536 218a627eb53e
permissions -rw-r--r--
Added a copy of Firebug Lite for debugging purposes. License is uncertain but being treated as MPL. (If is is not MPL then it is under something more permissive that permits relicensing anyway)
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<?php
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/*
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 * Enano - an open-source CMS capable of wiki functions, Drupal-like sidebar blocks, and everything in between
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 * Version 1.1.3 (Caoineag alpha 3)
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 * Copyright (C) 2006-2007 Dan Fuhry
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 * captcha.php - visual confirmation system used during registration
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 *
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 * This program is Free Software; you can redistribute and/or modify it under the terms of the GNU General Public License
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 * as published by the Free Software Foundation; either version 2 of the License, or (at your option) any later version.
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 *
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 * This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied
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 * warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for details.
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 */
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/**
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 * A more complex captcha engine that relies on GD.
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 * @package Enano
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 * @subpackage User management
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 * @copyright 2007-2008 Dan Fuhry
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 * @copyright 2002-2008 phpBB Group
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 */
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class captcha_engine_potpourri extends captcha_base
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{
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  var $captcha_config;
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  function __construct($sid, $r = false)
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  {
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    parent::__construct($sid, $r);
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    $hex = Array('0', '1', '2', '3', '4', '5', '6', '7', '8', '9', 'A', 'B', 'C', 'D', 'E', 'F');
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    $latticecolor = '#';
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    for ( $i = 0; $i < 6; $i++ )
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      $latticecolor .= $hex[mt_rand(0, 15)];
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    $this->captcha_config = array (
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      'width' => '350',
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      'height' => '90',
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      'background_color' => '#E5ECF9',
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      'jpeg' => '0',
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      'jpeg_quality' => '95',
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      'pre_letters' => '1',
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      'pre_letters_great' => '0',
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      'font' => '1',
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      'chess' => '2',
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      'ellipses' => '2',
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      'arcs' => '2',
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      'lines' => '2',
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      'image' => '0',
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      'gammacorrect' => '0.8',
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      'foreground_lattice_x' => (string)mt_rand(25, 30),
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      'foreground_lattice_y' => (string)mt_rand(25, 30),
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      'lattice_color' => $latticecolor,
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    );
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  }
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  function make_image()
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  {
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    $code = $this->get_code();
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    // Prefs
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    $total_width = $this->captcha_config['width'];
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    $total_height = $this->captcha_config['height'];
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    $hex_bg_color = $this->get_rgb($this->captcha_config['background_color']);
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    $bg_color = array();
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    $bg_color = explode(",", $hex_bg_color);
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    $jpeg = $this->captcha_config['jpeg'];
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    $img_quality = $this->captcha_config['jpeg_quality'];
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    // Max quality is 95
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    $pre_letters = $this->captcha_config['pre_letters'];
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    $pre_letter_great = $this->captcha_config['pre_letters_great'];
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    $rnd_font = $this->captcha_config['font'];
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    $chess = $this->captcha_config['chess'];
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    $ellipses = $this->captcha_config['ellipses'];
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    $arcs = $this->captcha_config['arcs'];
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    $lines = $this->captcha_config['lines'];
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    $image = $this->captcha_config['image'];
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    $gammacorrect = $this->captcha_config['gammacorrect'];
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    $foreground_lattice_y = $this->captcha_config['foreground_lattice_y'];
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    $foreground_lattice_x = $this->captcha_config['foreground_lattice_x'];
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    $hex_lattice_color = $this->get_rgb($this->captcha_config['lattice_color']);
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    $rgb_lattice_color = array();
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    $rgb_lattice_color = explode(",", $hex_lattice_color);
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    $font_debug = false;
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    // Fonts and images init
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    if ($image)
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    {
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      $bg_imgs = array();
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      if ($img_dir = opendir(ENANO_ROOT.'/includes/captcha/pics/'))
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      {
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        while (true == ($file = @readdir($img_dir))) 
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        { 
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          if ((substr(strtolower($file), -3) == 'jpg') || (substr(strtolower($file), -3) == 'gif'))    
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          {         
6ae6e387a0e3 Implemented a new CAPTCHA API; the frontend ($session->{make,get}_captcha) is API-compatible but the backend (the captcha class) is deprecated.
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   103
            $bg_imgs[] = $file; 
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   104
          }     
6ae6e387a0e3 Implemented a new CAPTCHA API; the frontend ($session->{make,get}_captcha) is API-compatible but the backend (the captcha class) is deprecated.
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   105
        }
6ae6e387a0e3 Implemented a new CAPTCHA API; the frontend ($session->{make,get}_captcha) is API-compatible but the backend (the captcha class) is deprecated.
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parents:
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   106
        closedir($img_dir);
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diff changeset
   107
      }
6ae6e387a0e3 Implemented a new CAPTCHA API; the frontend ($session->{make,get}_captcha) is API-compatible but the backend (the captcha class) is deprecated.
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parents:
diff changeset
   108
      // Grab a random Background Image or set FALSE if none was found
6ae6e387a0e3 Implemented a new CAPTCHA API; the frontend ($session->{make,get}_captcha) is API-compatible but the backend (the captcha class) is deprecated.
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parents:
diff changeset
   109
      $bg_img = ( count($bg_imgs) ) ? rand(0, (count($bg_imgs)-1)) : false;
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diff changeset
   110
    }
6ae6e387a0e3 Implemented a new CAPTCHA API; the frontend ($session->{make,get}_captcha) is API-compatible but the backend (the captcha class) is deprecated.
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diff changeset
   111
    
6ae6e387a0e3 Implemented a new CAPTCHA API; the frontend ($session->{make,get}_captcha) is API-compatible but the backend (the captcha class) is deprecated.
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diff changeset
   112
    $fonts = array();
6ae6e387a0e3 Implemented a new CAPTCHA API; the frontend ($session->{make,get}_captcha) is API-compatible but the backend (the captcha class) is deprecated.
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   113
    if ($fonts_dir = opendir(ENANO_ROOT . '/includes/captcha/fonts/'))
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parents:
diff changeset
   114
    {
6ae6e387a0e3 Implemented a new CAPTCHA API; the frontend ($session->{make,get}_captcha) is API-compatible but the backend (the captcha class) is deprecated.
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   115
      while (true == ($file = @readdir($fonts_dir))) 
6ae6e387a0e3 Implemented a new CAPTCHA API; the frontend ($session->{make,get}_captcha) is API-compatible but the backend (the captcha class) is deprecated.
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parents:
diff changeset
   116
      { 
6ae6e387a0e3 Implemented a new CAPTCHA API; the frontend ($session->{make,get}_captcha) is API-compatible but the backend (the captcha class) is deprecated.
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   117
        if ((substr(strtolower($file), strlen($file)-3, strlen($file)) == 'ttf'))
6ae6e387a0e3 Implemented a new CAPTCHA API; the frontend ($session->{make,get}_captcha) is API-compatible but the backend (the captcha class) is deprecated.
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parents:
diff changeset
   118
        {
6ae6e387a0e3 Implemented a new CAPTCHA API; the frontend ($session->{make,get}_captcha) is API-compatible but the backend (the captcha class) is deprecated.
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   119
          $fonts[] = $file; 
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   120
        }     
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   121
      }
6ae6e387a0e3 Implemented a new CAPTCHA API; the frontend ($session->{make,get}_captcha) is API-compatible but the backend (the captcha class) is deprecated.
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   122
      closedir($fonts_dir);
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diff changeset
   123
    } else {
6ae6e387a0e3 Implemented a new CAPTCHA API; the frontend ($session->{make,get}_captcha) is API-compatible but the backend (the captcha class) is deprecated.
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   124
      die('Error reading directory: '.ENANO_ROOT.'/includes/captcha/fonts/');
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   125
    }
6ae6e387a0e3 Implemented a new CAPTCHA API; the frontend ($session->{make,get}_captcha) is API-compatible but the backend (the captcha class) is deprecated.
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   126
    $font = mt_rand(0, (count($fonts)-1));
6ae6e387a0e3 Implemented a new CAPTCHA API; the frontend ($session->{make,get}_captcha) is API-compatible but the backend (the captcha class) is deprecated.
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   127
    
6ae6e387a0e3 Implemented a new CAPTCHA API; the frontend ($session->{make,get}_captcha) is API-compatible but the backend (the captcha class) is deprecated.
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   128
    // Generate
6ae6e387a0e3 Implemented a new CAPTCHA API; the frontend ($session->{make,get}_captcha) is API-compatible but the backend (the captcha class) is deprecated.
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   129
    $image = ($this->gdVersion() >= 2) ? imagecreatetruecolor($total_width, $total_height) : imagecreate($total_width, $total_height);
6ae6e387a0e3 Implemented a new CAPTCHA API; the frontend ($session->{make,get}_captcha) is API-compatible but the backend (the captcha class) is deprecated.
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   130
    $background_color = imagecolorallocate($image, $bg_color[0], $bg_color[1], $bg_color[2]);
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   131
    imagefill($image, 0, 0, $background_color);
6ae6e387a0e3 Implemented a new CAPTCHA API; the frontend ($session->{make,get}_captcha) is API-compatible but the backend (the captcha class) is deprecated.
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diff changeset
   132
    
6ae6e387a0e3 Implemented a new CAPTCHA API; the frontend ($session->{make,get}_captcha) is API-compatible but the backend (the captcha class) is deprecated.
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   133
    // Generate backgrund
6ae6e387a0e3 Implemented a new CAPTCHA API; the frontend ($session->{make,get}_captcha) is API-compatible but the backend (the captcha class) is deprecated.
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   134
    if ($chess == '1' || $chess == '2' && rand(0,1))
6ae6e387a0e3 Implemented a new CAPTCHA API; the frontend ($session->{make,get}_captcha) is API-compatible but the backend (the captcha class) is deprecated.
Dan
parents:
diff changeset
   135
    {
6ae6e387a0e3 Implemented a new CAPTCHA API; the frontend ($session->{make,get}_captcha) is API-compatible but the backend (the captcha class) is deprecated.
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   136
      // Draw rectangles
6ae6e387a0e3 Implemented a new CAPTCHA API; the frontend ($session->{make,get}_captcha) is API-compatible but the backend (the captcha class) is deprecated.
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diff changeset
   137
      for($i = 0; $i <= 8; $i++)
6ae6e387a0e3 Implemented a new CAPTCHA API; the frontend ($session->{make,get}_captcha) is API-compatible but the backend (the captcha class) is deprecated.
Dan
parents:
diff changeset
   138
      {
6ae6e387a0e3 Implemented a new CAPTCHA API; the frontend ($session->{make,get}_captcha) is API-compatible but the backend (the captcha class) is deprecated.
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diff changeset
   139
        $rectanglecolor = imagecolorallocate($image, rand(100,200),rand(100,200),rand(100,200));
6ae6e387a0e3 Implemented a new CAPTCHA API; the frontend ($session->{make,get}_captcha) is API-compatible but the backend (the captcha class) is deprecated.
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diff changeset
   140
        imagefilledrectangle($image, 0, 0, round($total_width-($total_width/8*$i)), round($total_height), $rectanglecolor);
6ae6e387a0e3 Implemented a new CAPTCHA API; the frontend ($session->{make,get}_captcha) is API-compatible but the backend (the captcha class) is deprecated.
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diff changeset
   141
        $rectanglecolor = imagecolorallocate($image, rand(100,200),rand(100,200),rand(100,200));
6ae6e387a0e3 Implemented a new CAPTCHA API; the frontend ($session->{make,get}_captcha) is API-compatible but the backend (the captcha class) is deprecated.
Dan
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diff changeset
   142
        imagefilledrectangle($image, 0, 0, round($total_width-($total_width/8*$i)), round($total_height/2), $rectanglecolor);
6ae6e387a0e3 Implemented a new CAPTCHA API; the frontend ($session->{make,get}_captcha) is API-compatible but the backend (the captcha class) is deprecated.
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diff changeset
   143
      }
6ae6e387a0e3 Implemented a new CAPTCHA API; the frontend ($session->{make,get}_captcha) is API-compatible but the backend (the captcha class) is deprecated.
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diff changeset
   144
    }
6ae6e387a0e3 Implemented a new CAPTCHA API; the frontend ($session->{make,get}_captcha) is API-compatible but the backend (the captcha class) is deprecated.
Dan
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diff changeset
   145
    if ($ellipses == '1' || $ellipses == '2' && rand(0,1))
6ae6e387a0e3 Implemented a new CAPTCHA API; the frontend ($session->{make,get}_captcha) is API-compatible but the backend (the captcha class) is deprecated.
Dan
parents:
diff changeset
   146
    {
6ae6e387a0e3 Implemented a new CAPTCHA API; the frontend ($session->{make,get}_captcha) is API-compatible but the backend (the captcha class) is deprecated.
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diff changeset
   147
      // Draw random ellipses
6ae6e387a0e3 Implemented a new CAPTCHA API; the frontend ($session->{make,get}_captcha) is API-compatible but the backend (the captcha class) is deprecated.
Dan
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diff changeset
   148
      for ($i = 1; $i <= 60; $i++)
6ae6e387a0e3 Implemented a new CAPTCHA API; the frontend ($session->{make,get}_captcha) is API-compatible but the backend (the captcha class) is deprecated.
Dan
parents:
diff changeset
   149
      {
6ae6e387a0e3 Implemented a new CAPTCHA API; the frontend ($session->{make,get}_captcha) is API-compatible but the backend (the captcha class) is deprecated.
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diff changeset
   150
        $ellipsecolor = imagecolorallocate($image, rand(100,250),rand(100,250),rand(100,250));
6ae6e387a0e3 Implemented a new CAPTCHA API; the frontend ($session->{make,get}_captcha) is API-compatible but the backend (the captcha class) is deprecated.
Dan
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diff changeset
   151
        imagefilledellipse($image, round(rand(0, $total_width)), round(rand(0, $total_height)), round(rand(0, $total_width/8)), round(rand(0, $total_height/4)), $ellipsecolor);	
6ae6e387a0e3 Implemented a new CAPTCHA API; the frontend ($session->{make,get}_captcha) is API-compatible but the backend (the captcha class) is deprecated.
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diff changeset
   152
      }
6ae6e387a0e3 Implemented a new CAPTCHA API; the frontend ($session->{make,get}_captcha) is API-compatible but the backend (the captcha class) is deprecated.
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diff changeset
   153
    }
6ae6e387a0e3 Implemented a new CAPTCHA API; the frontend ($session->{make,get}_captcha) is API-compatible but the backend (the captcha class) is deprecated.
Dan
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diff changeset
   154
    if ($arcs == '1' || $arcs == '2' && rand(0,1))
6ae6e387a0e3 Implemented a new CAPTCHA API; the frontend ($session->{make,get}_captcha) is API-compatible but the backend (the captcha class) is deprecated.
Dan
parents:
diff changeset
   155
    {
6ae6e387a0e3 Implemented a new CAPTCHA API; the frontend ($session->{make,get}_captcha) is API-compatible but the backend (the captcha class) is deprecated.
Dan
parents:
diff changeset
   156
      // Draw random partial ellipses
6ae6e387a0e3 Implemented a new CAPTCHA API; the frontend ($session->{make,get}_captcha) is API-compatible but the backend (the captcha class) is deprecated.
Dan
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diff changeset
   157
      for ($i = 0; $i <= 30; $i++)
6ae6e387a0e3 Implemented a new CAPTCHA API; the frontend ($session->{make,get}_captcha) is API-compatible but the backend (the captcha class) is deprecated.
Dan
parents:
diff changeset
   158
      {
6ae6e387a0e3 Implemented a new CAPTCHA API; the frontend ($session->{make,get}_captcha) is API-compatible but the backend (the captcha class) is deprecated.
Dan
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diff changeset
   159
        $linecolor = imagecolorallocate($image, rand(120,255),rand(120,255),rand(120,255));
6ae6e387a0e3 Implemented a new CAPTCHA API; the frontend ($session->{make,get}_captcha) is API-compatible but the backend (the captcha class) is deprecated.
Dan
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diff changeset
   160
        $cx = round(rand(1, $total_width));
6ae6e387a0e3 Implemented a new CAPTCHA API; the frontend ($session->{make,get}_captcha) is API-compatible but the backend (the captcha class) is deprecated.
Dan
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diff changeset
   161
        $cy = round(rand(1, $total_height));
6ae6e387a0e3 Implemented a new CAPTCHA API; the frontend ($session->{make,get}_captcha) is API-compatible but the backend (the captcha class) is deprecated.
Dan
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diff changeset
   162
        $int_w = round(rand(1, $total_width/2));
6ae6e387a0e3 Implemented a new CAPTCHA API; the frontend ($session->{make,get}_captcha) is API-compatible but the backend (the captcha class) is deprecated.
Dan
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diff changeset
   163
        $int_h = round(rand(1, $total_height));
6ae6e387a0e3 Implemented a new CAPTCHA API; the frontend ($session->{make,get}_captcha) is API-compatible but the backend (the captcha class) is deprecated.
Dan
parents:
diff changeset
   164
        imagearc($image, $cx, $cy, $int_w, $int_h, round(rand(0, 190)), round(rand(191, 360)), $linecolor);
6ae6e387a0e3 Implemented a new CAPTCHA API; the frontend ($session->{make,get}_captcha) is API-compatible but the backend (the captcha class) is deprecated.
Dan
parents:
diff changeset
   165
        imagearc($image, $cx-1, $cy-1, $int_w, $int_h, round(rand(0, 190)), round(rand(191, 360)), $linecolor);
6ae6e387a0e3 Implemented a new CAPTCHA API; the frontend ($session->{make,get}_captcha) is API-compatible but the backend (the captcha class) is deprecated.
Dan
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diff changeset
   166
      }
6ae6e387a0e3 Implemented a new CAPTCHA API; the frontend ($session->{make,get}_captcha) is API-compatible but the backend (the captcha class) is deprecated.
Dan
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diff changeset
   167
    }
6ae6e387a0e3 Implemented a new CAPTCHA API; the frontend ($session->{make,get}_captcha) is API-compatible but the backend (the captcha class) is deprecated.
Dan
parents:
diff changeset
   168
    if ($lines == '1' || $lines == '2' && rand(0,1))
6ae6e387a0e3 Implemented a new CAPTCHA API; the frontend ($session->{make,get}_captcha) is API-compatible but the backend (the captcha class) is deprecated.
Dan
parents:
diff changeset
   169
    {
6ae6e387a0e3 Implemented a new CAPTCHA API; the frontend ($session->{make,get}_captcha) is API-compatible but the backend (the captcha class) is deprecated.
Dan
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diff changeset
   170
      // Draw random lines
6ae6e387a0e3 Implemented a new CAPTCHA API; the frontend ($session->{make,get}_captcha) is API-compatible but the backend (the captcha class) is deprecated.
Dan
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diff changeset
   171
      for ($i = 0; $i <= 50; $i++)
6ae6e387a0e3 Implemented a new CAPTCHA API; the frontend ($session->{make,get}_captcha) is API-compatible but the backend (the captcha class) is deprecated.
Dan
parents:
diff changeset
   172
      {
6ae6e387a0e3 Implemented a new CAPTCHA API; the frontend ($session->{make,get}_captcha) is API-compatible but the backend (the captcha class) is deprecated.
Dan
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diff changeset
   173
        $linecolor = imagecolorallocate($image, rand(120,255),rand(120,255),rand(120,255));
6ae6e387a0e3 Implemented a new CAPTCHA API; the frontend ($session->{make,get}_captcha) is API-compatible but the backend (the captcha class) is deprecated.
Dan
parents:
diff changeset
   174
        imageline($image, round(rand(1, $total_width*3)), round(rand(1, $total_height*5)), round(rand(1, $total_width/2)), round(rand(1, $total_height*2)), $linecolor);
6ae6e387a0e3 Implemented a new CAPTCHA API; the frontend ($session->{make,get}_captcha) is API-compatible but the backend (the captcha class) is deprecated.
Dan
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diff changeset
   175
      }
6ae6e387a0e3 Implemented a new CAPTCHA API; the frontend ($session->{make,get}_captcha) is API-compatible but the backend (the captcha class) is deprecated.
Dan
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diff changeset
   176
    }
6ae6e387a0e3 Implemented a new CAPTCHA API; the frontend ($session->{make,get}_captcha) is API-compatible but the backend (the captcha class) is deprecated.
Dan
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diff changeset
   177
    
6ae6e387a0e3 Implemented a new CAPTCHA API; the frontend ($session->{make,get}_captcha) is API-compatible but the backend (the captcha class) is deprecated.
Dan
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diff changeset
   178
    $text_color_array = array('255,51,0', '51,77,255', '204,51,102', '0,153,0', '255,166,2', '255,0,255', '255,0,0', '0,255,0', '0,0,255', '0,255,255');
6ae6e387a0e3 Implemented a new CAPTCHA API; the frontend ($session->{make,get}_captcha) is API-compatible but the backend (the captcha class) is deprecated.
Dan
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diff changeset
   179
    shuffle($text_color_array);
6ae6e387a0e3 Implemented a new CAPTCHA API; the frontend ($session->{make,get}_captcha) is API-compatible but the backend (the captcha class) is deprecated.
Dan
parents:
diff changeset
   180
    $pre_text_color_array = array('255,71,20', '71,20,224', '224,71,122', '20,173,20', '255,186,22', '25,25,25');
6ae6e387a0e3 Implemented a new CAPTCHA API; the frontend ($session->{make,get}_captcha) is API-compatible but the backend (the captcha class) is deprecated.
Dan
parents:
diff changeset
   181
    shuffle($pre_text_color_array);
6ae6e387a0e3 Implemented a new CAPTCHA API; the frontend ($session->{make,get}_captcha) is API-compatible but the backend (the captcha class) is deprecated.
Dan
parents:
diff changeset
   182
    $white = imagecolorallocate($image, 255, 255, 255);
6ae6e387a0e3 Implemented a new CAPTCHA API; the frontend ($session->{make,get}_captcha) is API-compatible but the backend (the captcha class) is deprecated.
Dan
parents:
diff changeset
   183
    $gray = imagecolorallocate($image, 100, 100, 100);
6ae6e387a0e3 Implemented a new CAPTCHA API; the frontend ($session->{make,get}_captcha) is API-compatible but the backend (the captcha class) is deprecated.
Dan
parents:
diff changeset
   184
    $black = imagecolorallocate($image, 0, 0, 0);
6ae6e387a0e3 Implemented a new CAPTCHA API; the frontend ($session->{make,get}_captcha) is API-compatible but the backend (the captcha class) is deprecated.
Dan
parents:
diff changeset
   185
    $lattice_color = imagecolorallocate($image, $rgb_lattice_color[0], $rgb_lattice_color[1], $rgb_lattice_color[2]);
6ae6e387a0e3 Implemented a new CAPTCHA API; the frontend ($session->{make,get}_captcha) is API-compatible but the backend (the captcha class) is deprecated.
Dan
parents:
diff changeset
   186
    
6ae6e387a0e3 Implemented a new CAPTCHA API; the frontend ($session->{make,get}_captcha) is API-compatible but the backend (the captcha class) is deprecated.
Dan
parents:
diff changeset
   187
    $x_char_position = (round(($total_width - 12) / strlen($code)) + mt_rand(-3, 5));
6ae6e387a0e3 Implemented a new CAPTCHA API; the frontend ($session->{make,get}_captcha) is API-compatible but the backend (the captcha class) is deprecated.
Dan
parents:
diff changeset
   188
    
6ae6e387a0e3 Implemented a new CAPTCHA API; the frontend ($session->{make,get}_captcha) is API-compatible but the backend (the captcha class) is deprecated.
Dan
parents:
diff changeset
   189
    for ($i = 0; $i < strlen($code); $i++)
6ae6e387a0e3 Implemented a new CAPTCHA API; the frontend ($session->{make,get}_captcha) is API-compatible but the backend (the captcha class) is deprecated.
Dan
parents:
diff changeset
   190
    {
6ae6e387a0e3 Implemented a new CAPTCHA API; the frontend ($session->{make,get}_captcha) is API-compatible but the backend (the captcha class) is deprecated.
Dan
parents:
diff changeset
   191
      mt_srand((double)microtime()*1000000);
6ae6e387a0e3 Implemented a new CAPTCHA API; the frontend ($session->{make,get}_captcha) is API-compatible but the backend (the captcha class) is deprecated.
Dan
parents:
diff changeset
   192
    
6ae6e387a0e3 Implemented a new CAPTCHA API; the frontend ($session->{make,get}_captcha) is API-compatible but the backend (the captcha class) is deprecated.
Dan
parents:
diff changeset
   193
      $char = $code{$i};
6ae6e387a0e3 Implemented a new CAPTCHA API; the frontend ($session->{make,get}_captcha) is API-compatible but the backend (the captcha class) is deprecated.
Dan
parents:
diff changeset
   194
      $size = mt_rand(floor($total_height / 3.5), ceil($total_height / 2.8));
6ae6e387a0e3 Implemented a new CAPTCHA API; the frontend ($session->{make,get}_captcha) is API-compatible but the backend (the captcha class) is deprecated.
Dan
parents:
diff changeset
   195
      $font = ($rnd_font) ? rand(0, (count($fonts)-1)) : $font;
6ae6e387a0e3 Implemented a new CAPTCHA API; the frontend ($session->{make,get}_captcha) is API-compatible but the backend (the captcha class) is deprecated.
Dan
parents:
diff changeset
   196
      $angle = mt_rand(-30, 30);
6ae6e387a0e3 Implemented a new CAPTCHA API; the frontend ($session->{make,get}_captcha) is API-compatible but the backend (the captcha class) is deprecated.
Dan
parents:
diff changeset
   197
    
6ae6e387a0e3 Implemented a new CAPTCHA API; the frontend ($session->{make,get}_captcha) is API-compatible but the backend (the captcha class) is deprecated.
Dan
parents:
diff changeset
   198
      $char_pos = array();
6ae6e387a0e3 Implemented a new CAPTCHA API; the frontend ($session->{make,get}_captcha) is API-compatible but the backend (the captcha class) is deprecated.
Dan
parents:
diff changeset
   199
      $char_pos = imagettfbbox($size, $angle, ENANO_ROOT.'/includes/captcha/fonts/'.$fonts[$font], $char);
6ae6e387a0e3 Implemented a new CAPTCHA API; the frontend ($session->{make,get}_captcha) is API-compatible but the backend (the captcha class) is deprecated.
Dan
parents:
diff changeset
   200
      $letter_width = abs($char_pos[0]) + abs($char_pos[4]);
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      $letter_height = abs($char_pos[1]) + abs($char_pos[5]);
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      $x_pos = ($x_char_position / 4) + ($i * $x_char_position);
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      ($i == strlen($code)-1 && $x_pos >= ($total_width - ($letter_width + 5))) ? $x_pos = ($total_width - ($letter_width + 5)) : '';
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      $y_pos = mt_rand(($size * 1.4 ), $total_height - ($size * 0.4));
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    //	Pre letters
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      $size = ($pre_letter_great) ? $size + (2 * $pre_letters) : $size - (2 * $pre_letters);
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      for ($count = 1; $count <= $pre_letters; $count++)
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      {
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        $pre_angle = $angle + mt_rand(-20, 20);
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        $text_color = $pre_text_color_array[mt_rand(0,count($pre_text_color_array)-1)];
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        $text_color = explode(",", $text_color);
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        $textcolor = imagecolorallocate($image, $text_color[0], $text_color[1], $text_color[2]);
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        imagettftext($image, $size, $pre_angle, $x_pos, $y_pos-2, $white, ENANO_ROOT.'/includes/captcha/fonts/'.$fonts[$font], $char);
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        imagettftext($image, $size, $pre_angle, $x_pos+2, $y_pos, $black, ENANO_ROOT.'/includes/captcha/fonts/'.$fonts[$font], $char);
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        imagettftext($image, $size, $pre_angle, $x_pos+1, $y_pos-1, $textcolor, ENANO_ROOT.'/includes/captcha/fonts/'.$fonts[$font], $char);
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        $size = ($pre_letter_great) ? $size - 2 : $size + 2;
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      }
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    //	Final letters
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      $text_color = $text_color_array[mt_rand(0,count($text_color_array)-1)];
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      $text_color = explode(",", $text_color);
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      $textcolor = imagecolorallocate($image, $text_color[0], $text_color[1], $text_color[2]);
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      imagettftext($image, $size, $angle, $x_pos, $y_pos-2, $white, ENANO_ROOT.'/includes/captcha/fonts/'.$fonts[$font], $char);
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      imagettftext($image, $size, $angle, $x_pos+2, $y_pos, $black, ENANO_ROOT.'/includes/captcha/fonts/'.$fonts[$font], $char);
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      imagettftext($image, $size, $angle, $x_pos+1, $y_pos-1, $textcolor, ENANO_ROOT.'/includes/captcha/fonts/'.$fonts[$font], $char);
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    }
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    ($gammacorrect) ? imagegammacorrect($image, 1.0, $gammacorrect) : '';
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    // Generate a white lattice in foreground
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    if ($foreground_lattice_y)
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    {
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      // x lines
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      $ih = round($total_height / $foreground_lattice_y);
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      for ($i = 0; $i <= $ih; $i++)
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      {
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        imageline($image, 0, $i*$foreground_lattice_y, $total_width, $i*$foreground_lattice_y, $lattice_color);
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      }
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    }
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    if ($foreground_lattice_x)
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    {
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      // y lines
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      $iw = round($total_width / $foreground_lattice_x);
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      for ($i = 0; $i <= $iw; $i++)
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      {
6ae6e387a0e3 Implemented a new CAPTCHA API; the frontend ($session->{make,get}_captcha) is API-compatible but the backend (the captcha class) is deprecated.
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        imageline($image, $i*$foreground_lattice_x, 0, $i*$foreground_lattice_x, $total_height, $lattice_color);
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      }
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    }
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   256
    
6ae6e387a0e3 Implemented a new CAPTCHA API; the frontend ($session->{make,get}_captcha) is API-compatible but the backend (the captcha class) is deprecated.
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   257
    // Font debug
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   258
    if ($font_debug && !$rnd_font)
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   259
    {
6ae6e387a0e3 Implemented a new CAPTCHA API; the frontend ($session->{make,get}_captcha) is API-compatible but the backend (the captcha class) is deprecated.
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      imagestring($image, 5, 2, 0, $fonts[$font], $white);
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   261
      imagestring($image, 5, 5, 0, $fonts[$font], $white);
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      imagestring($image, 5, 4, 2, $fonts[$font], $gray);
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   263
      imagestring($image, 5, 3, 1, $fonts[$font], $black);
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   264
    }
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   265
    
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   266
    // Display
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   267
    header("Last-Modified: " . gmdate("D, d M Y H:i:s") ." GMT"); 
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    header("Pragma: no-cache"); 
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   269
    header("Cache-Control: no-store, no-cache, max-age=0, must-revalidate");
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   270
    (!$jpeg) ? header("Content-Type: image/png") : header("Content-Type: image/jpeg");
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   271
    
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   272
    (!$jpeg) ? imagepng($image) : imagejpeg($image, '', $img_quality);
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   273
    imagedestroy($image);
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   274
  }
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   275
  
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   276
  // Function get_rgb by Frank Burian
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   277
  // http://www.phpfuncs.org/?content=show&id=46
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   278
  function get_rgb($hex) { 
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   279
    $hex_array = array(0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 
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        'A' => 10, 'B' => 11, 'C' => 12, 'D' => 13, 'E' => 14, 
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   281
        'F' => 15); 
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   282
    $hex = str_replace('#', '', strtoupper($hex)); 
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   283
    if (($length = strlen($hex)) == 3) { 
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   284
        $hex = $hex{0}.$hex{0}.$hex{1}.$hex{1}.$hex{2}.$hex{2}; 
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   285
        $length = 6; 
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   286
    } 
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   287
    if ($length != 6 or strlen(str_replace(array_keys($hex_array), '', $hex))) 
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   288
        return NULL; 
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   289
    $rgb['r'] = $hex_array[$hex{0}] * 16 + $hex_array[$hex{1}]; 
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   290
    $rgb['g'] = $hex_array[$hex{2}] * 16 + $hex_array[$hex{3}]; 
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   291
    $rgb['b']= $hex_array[$hex{4}] * 16 + $hex_array[$hex{5}]; 
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   292
    return $rgb['r'].','.$rgb['g'].','.$rgb['b']; 
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   293
  }
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   294
  
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   295
  // Function  gdVersion by Hagan Fox
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   296
  // http://de3.php.net/manual/en/function.gd-info.php#52481
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  function gdVersion($user_ver = 0)
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  {
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     if (! extension_loaded('gd')) { return; }
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     static $gd_ver = 0;
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     // Just accept the specified setting if it's 1.
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     if ($user_ver == 1) { $gd_ver = 1; return 1; }
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     // Use the static variable if function was called previously.
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     if ($user_ver !=2 && $gd_ver > 0 ) { return $gd_ver; }
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     // Use the gd_info() function if possible.
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     if (function_exists('gd_info')) {
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         $ver_info = gd_info();
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         preg_match('/\d/', $ver_info['GD Version'], $match);
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         $gd_ver = $match[0];
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         return $match[0];
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     }
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     // If phpinfo() is disabled use a specified / fail-safe choice...
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     if (preg_match('/phpinfo/', ini_get('disable_functions'))) {
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         if ($user_ver == 2) {
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             $gd_ver = 2;
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             return 2;
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         } else {
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             $gd_ver = 1;
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             return 1;
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         }
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     }
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     // ...otherwise use phpinfo().
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     ob_start();
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     phpinfo(8);
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     $info = ob_get_contents();
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     ob_end_clean();
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     $info = stristr($info, 'gd version');
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     preg_match('/\d/', $info, $match);
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     $gd_ver = $match[0];
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     return $match[0];
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  }
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}