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Code Issues Releases Wiki Activity

New option for the GD VC. Parameters need some more tweaking

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git-svn-id: file:///svn/phpbb/branches/phpBB-3_0_0@9283 89ea8834-ac86-4346-8a33-228a782c2dd0
This commit is contained in:
Henry Sudhof
2009-01-21 13:37:50 +00:00
parent fce20fd898
commit 7103900847
6 changed files with 55 additions and 6 deletions
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43
phpBB/includes/captcha/captcha_gd.php
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@@ -27,6 +27,7 @@ class captcha
var $width = 360;
var $height = 96;
/**
* Create the image containing $code with a seed of $seed
*/
@@ -34,7 +35,7 @@ class captcha
{
global $config;
srand($seed);
mt_srand($seed);
//mt_srand($seed);
// Create image
$img = imagecreatetruecolor($this->width, $this->height);
@@ -98,8 +99,8 @@ class captcha
imagedashedline($img, mt_rand($x -3, $x + 3), mt_rand(0, 4), mt_rand($x -3, $x + 3), mt_rand($this->height - 5, $this->height), $current_colour);
}
}
$xoffset = 5;
for ($i = 0; $i < $code_len; ++$i)
{
$dimm = $bounding_boxes[$i];
@@ -109,12 +110,14 @@ class captcha
$characters[$i]->drawchar($sizes[$i], $xoffset, $yoffset, $img, $colour->get_resource('background'), $scheme);
$xoffset += $dimm[2];
}
if ($config['captcha_gd_wave'])
{
$this->wave($img);
}
if ($config['captcha_gd_foreground_noise'])
{
$this->noise_line($img, 0, 0, $this->width, $this->height, $colour->get_resource('background'), $scheme, $bg_colours);
}
// Send image
header('Content-Type: image/png');
header('Cache-control: no-cache, no-store');
@@ -122,6 +125,38 @@ class captcha
imagedestroy($img);
}
/**
* Sinus
*/
function wave($img)
{
global $config;
$period_x = mt_rand(8,18);
$period_y = mt_rand(5,14);
$amp_x = mt_rand(5,10);
$amp_y = mt_rand(2,4);
$socket = mt_rand(0,100);
$dampen_x = mt_rand($this->width/5, $this->width/2);
$dampen_y = mt_rand($this->height/5, $this->height/2);
$direction_x = (mt_rand (0, 1));
$direction_y = (mt_rand (0, 1));
for ($i = 0; $i < $this->width; $i++)
{
$dir = ($direction_x) ? $i : ($this->width - $i);
imagecopy($img, $img, $i-1, sin($socket+ $i/($period_x + $dir/$dampen_x)) * $amp_x, $i, 0, 1, $this->height);
}
$socket = mt_rand(0,100);
for ($i = 0; $i < $this->height; $i++)
{
$dir = ($direction_y) ? $i : ($this->height - $i);
imagecopy($img, $img ,sin($socket + $i/($period_y + ($dir)/$dampen_y)) * $amp_y, $i-1, 0, $i, $this->width, 1);
}
return $img;
}
/**
* Noise line
*/