JBZoo\Image\Image::thumbnail PHP Метод

    public function thumbnail($width, $height = null, $topIsZero = false)
    {
        $width = VarFilter::int($width);
        $height = VarFilter::int($height);
        // Determine height
        $height = $height ?: $width;
        // Determine aspect ratios
        $currentAspectRatio = $this->_height / $this->_width;
        $newAspectRatio = $height / $width;
        // Fit to height/width
        if ($newAspectRatio > $currentAspectRatio) {
            $this->fitToHeight($height);
        } else {
            $this->fitToWidth($width);
        }
        $left = floor($this->_width / 2 - $width / 2);
        $top = floor($this->_height / 2 - $height / 2);
        // Return trimmed image
        $right = $width + $left;
        $bottom = $height + $top;
        if ($topIsZero) {
            $bottom -= $top;
            $top = 0;
        }
        return $this->crop($left, $top, $right, $bottom);
    }

 public function testUnsupportedFormat()
 {
     $excepted = Helper::getExpected(__FUNCTION__ . '.png');
     $actual = Helper::getActual(__FUNCTION__ . '.tmp');
     $original = Helper::getOrig('1x1.tmp');
     if (copy($original, $actual)) {
         $img = new Image($actual);
         $info = $img->thumbnail(100, 200)->save()->getInfo();
         is('image/gif', $info['mime']);
         is(100, $info['width']);
         is(200, $info['height']);
         Helper::isFileEq($actual, $excepted);
     } else {
         fail('Can\'t copy original file!');
     }
 }