public function generate($text)
{
if (!function_exists('gd_info')) {
return '';
}
$textlen = strlen($text);
// We convert the hash into an array of integers.
$this->VALUES = array();
for ($i = 0; $i < $textlen; $i = $i + 2) {
array_push($this->VALUES, hexdec(substr($text, $i, 2)));
}
$this->VALUES_INDEX = 0;
// to walk the array.
// Then use these integers to drive the creation of an image.
$image = imagecreatetruecolor($this->width, $this->height);
$r = $r0 = $this->getInt();
$g = $g0 = $this->getInt();
$b = $b0 = $this->getInt();
// First, create an image with a specific gradient background.
$op = 'v';
if ($this->getInt() % 2 == 0) {
$op = 'h';
}
$image = $this->degrade($image, $op, array($r0, $g0, $b0), array(0, 0, 0));
for ($i = 0; $i < 7; ++$i) {
$action = $this->getInt();
$color = imagecolorallocate($image, $r, $g, $b);
$r = $r0 = ($r0 + $this->getInt() / 25) % 256;
$g = $g0 = ($g0 + $this->getInt() / 25) % 256;
$b = $b0 = ($b0 + $this->getInt() / 25) % 256;
$this->drawshape($image, $action, $color);
}
$color = imagecolorallocate($image, $this->getInt(), $this->getInt(), $this->getInt());
$this->drawshape($image, $this->getInt(), $color);
ob_start();
imagepng($image);
$imagedata = ob_get_contents();
ob_end_clean();
imagedestroy($image);
return $imagedata;
} /**
* Set nickname.
*
* @access public
* @param string $nickname
* @throws Exception
* @return void
*/
public function setNickname($nickname)
{
if (!Sjcl::isValid($nickname)) {
throw new Exception('Invalid data.', 66);
}
$this->_data->meta->nickname = $nickname;
// If a nickname is provided, we generate an icon based on a SHA512 HMAC
// of the users IP. (We assume that if the user did not enter a nickname,
// the user wants to be anonymous and we will not generate an icon.)
$icon = $this->_conf->getKey('icon');
if ($icon != 'none') {
$pngdata = '';
$hmac = TrafficLimiter::getHash();
if ($icon == 'identicon') {
$identicon = new Identicon();
$pngdata = $identicon->getImageDataUri($hmac, 16);
} elseif ($icon == 'vizhash') {
$vh = new Vizhash16x16();
$pngdata = 'data:image/png;base64,' . base64_encode($vh->generate($hmac));
}
if ($pngdata != '') {
$this->_data->meta->vizhash = $pngdata;
}
}
// Once the icon is generated, we do not keep the IP address hash.
}