GdThumb::calcWidth PHP Method

    protected function calcWidth($width, $height)
    {
        $newWidthPercentage = 100 * $this->maxWidth / $width;
        $newHeight = $height * $newWidthPercentage / 100;
        return array('newWidth' => intval($this->maxWidth), 'newHeight' => intval($newHeight));
    }