includes/captcha/engine_potpourri.php
author Dan
Sun, 11 Jan 2009 21:36:36 -0500
changeset 809 ae4ef502f742
parent 801 eb8b23f11744
child 1081 745200a9cc2a
permissions -rw-r--r--
DBAL: Fixed issues with die_json() and multiline responses from {mysql,pg_last}_error()
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
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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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eb8b23f11744 Two big commits in one day I know, but redid password storage to use HMAC-SHA1. Consolidated much AES processing to three core methods in session that should handle everything automagically. Installation works; upgrades should. Rebranded as 1.1.6.
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 * Version 1.1.6 (Caoineag beta 1)
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218a627eb53e Rebrand as 1.1.4 (Caoineag alpha 4)
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 * Copyright (C) 2006-2008 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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}