JBZoo\Image\Image::fitToWidth PHP Метод

    public function fitToWidth($width)
    {
        $width = VarFilter::int($width);
        $height = $width * ($this->_height / $this->_width);
        return $this->resize($width, $height);
    }

 public function testIssue8()
 {
     $excepted = Helper::getExpected(__FUNCTION__ . '.png');
     $actual = Helper::getActual(__FUNCTION__ . '.png');
     $base = Helper::getOrig('issue-8/original.png');
     $img = new Image($base);
     if ($img->getHeight() != $img->getWidth()) {
         if ($img->getWidth() < 175) {
             $img->fitToWidth($img->getWidth());
         } else {
             $img->fitToWidth(175);
         }
     } else {
         $img->bestFit(175, 175);
     }
     $img->saveAs($actual);
     Helper::isFileEq($actual, $excepted);
 }