Pop\Graph\Graph::__construct PHP Method

    public function __construct($options, $forceGd = false)
    {
        if (!isset($options['filename'])) {
            throw new Exception('Error: You must pass a filename in the $options parameter.');
        }
        if (isset($options['width']) && isset($options['height']) && is_numeric($options['width']) && is_numeric($options['height'])) {
            $this->width = $options['width'];
            $this->height = $options['height'];
        } else {
            throw new Exception('Error: You must either pass a valid width and height or a valid image in the $options parameter.');
        }
        if (isset($options['background']) && is_array($options['background']) && count($options['background']) == 3) {
            $background = new Rgb($options['background'][0], $options['background'][1], $options['background'][2]);
        } else {
            $background = null;
        }
        $this->fontColor = new Rgb(0, 0, 0);
        $this->axisColor = new Rgb(0, 0, 0);
        $this->showXColor = new Rgb(200, 200, 200);
        $this->showYColor = new Rgb(200, 200, 200);
        if (stripos($options['filename'], '.pdf') !== false) {
            $this->adapter = new Pdf($options['filename'], null, $this->width, $this->height);
        } else {
            if (stripos($options['filename'], '.svg') !== false) {
                $class = '\\Pop\\Image\\Svg';
            } else {
                if ($forceGd || !\Pop\Image\Imagick::isInstalled()) {
                    $class = '\\Pop\\Image\\Gd';
                } else {
                    $class = '\\Pop\\Image\\Imagick';
                }
            }
            $this->adapter = new $class($options['filename'], $this->width, $this->height, $background);
        }
    }