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and another CAPTCHA setting - add new noise shapes to the noise array for more variations.

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git-svn-id: file:///svn/phpbb/branches/phpBB-3_0_0@9320 89ea8834-ac86-4346-8a33-228a782c2dd0
This commit is contained in:
Henry Sudhof
2009-02-08 14:15:49 +00:00
parent 12c605755f
commit 6f486b0499
7 changed files with 77 additions and 3 deletions
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63
phpBB/includes/captcha/captcha_gd.php
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@@ -53,11 +53,12 @@ class captcha
$bg_colours = array_splice($scheme, mt_rand(6, 12));
// Generate code characters
$characters = $sizes = $bounding_boxes = array();
$characters = $sizes = $bounding_boxes = $noise = array();
$width_avail = $this->width - 15;
$code_len = strlen($code);
$captcha_bitmaps = $this->captcha_bitmaps();
$noise_bitmaps = $this->captcha_noise_bitmaps();
for ($i = 0; $i < $code_len; ++$i)
{
$characters[$i] = new char_cube3d($captcha_bitmaps, $code[$i]);
@@ -70,6 +71,7 @@ class captcha
$bounding_boxes[$i] = $box;
}
// Redistribute leftover x-space
$offset = array();
for ($i = 0; $i < $code_len; ++$i)
@@ -110,6 +112,26 @@ class captcha
$characters[$i]->drawchar($sizes[$i], $xoffset, $yoffset, $img, $colour->get_resource('background'), $scheme);
$xoffset += $dimm[2];
}
if ($config['captcha_gd_3d_noise'])
{
for ($i = 0; $i < $code_len; ++$i)
{
$noise[$i] = new char_cube3d($noise_bitmaps, mt_rand(1, 1 + count($noise_bitmaps)));
list($min, $max) = $noise[$i]->range();
//$box = $noise[$i]->dimensions($sizes[$i]);
}
$xoffset = 0;
for ($i = 0; $i < $code_len; ++$i)
{
$dimm = $bounding_boxes[$i];
$xoffset += ($offset[$i] - $dimm[0]);
$yoffset = mt_rand(-$dimm[1], $this->height - $dimm[3]);
$noise[$i]->drawchar($sizes[$i], $xoffset, $yoffset, $img, $colour->get_resource('background'), $scheme);
$xoffset += $dimm[2];
}
}
if ($config['captcha_gd_wave'])
{
$this->wave($img);
@@ -206,6 +228,45 @@ class captcha
imagesetthickness($img, 1);
}
function captcha_noise_bitmaps()
{
return array(
'width' => 9,
'height' => 5,
'data' => array(
1 => array(
array(1,0,0,0,1,0,0,0,0),
array(1,0,0,0,0,1,0,0,0),
array(1,0,0,0,0,1,0,0,0),
array(1,0,0,0,0,1,0,0,0),
array(1,0,0,0,0,0,1,0,0),
),
2 => array(
array(1,1,1,1,1,1,1,1,1),
array(0,0,0,0,0,0,0,1,0),
array(0,0,0,0,0,0,0,0,0),
array(0,0,0,0,0,0,0,0,0),
array(0,0,0,0,0,0,0,0,0),
),
3 => array(
array(1,0,0,0,0,0,0,0,0),
array(1,0,0,0,0,0,0,0,0),
array(1,0,0,0,0,0,0,0,0),
array(1,0,0,0,0,0,0,0,0),
array(1,0,0,0,0,0,0,0,0),
),
4 => array(
array(1,0,1,0,1,0,0,1,1),
array(0,0,0,0,0,0,0,1,0),
array(1,0,1,0,1,0,1,0,0),
array(0,0,0,0,0,0,0,0,0),
array(1,0,1,0,1,0,1,0,0),
),
));
}
/**
* Return bitmaps
*/