public function resize($maxwidth = 150, $maxheight = 150, $scale = true)
{
if (!$scale) {
$width = $maxwidth;
$height = $maxheight;
} else {
if ($this->width() < $maxwidth && $this->height() < $maxheight) {
$width = $this->width();
$height = $this->height();
} else {
if ($this->width() < $this->height()) {
$height = $maxheight;
$width = round($this->width() * $height / $this->height());
} else {
$width = $maxwidth;
$height = round($this->height() * $width / $this->width());
}
}
}
$new = new self();
$new->createtruecolor($width, $height);
$new->preparecopy($this);
$new->copyresampled($this->handle(), 0, 0, 0, 0, $width, $height, $this->width(), $this->height());
$this->sethandle($new->handle());
return $this;
}