public function generate($width, $height)
    {
        $sparkline = imagecreatetruecolor($width, $height);
        imagealphablending($sparkline, false);
        imagecopyresampled(
            $sparkline,
            $this->resource,
            0,
            0,
            0,
            0,
            $width,
            $height,
            $this->width,
            $this->height
        );
        imagesavealpha($sparkline, true);
        imagedestroy($this->resource);

        return $sparkline;
    }
public function generate($width, $height)
    {
        $sparkline = imagecreatetruecolor($width, $height);
        imagealphablending($sparkline, false);
        imagecopyresampled(
            $sparkline,
            $this->resource,
            0,
            0,
            0,
            0,
            $width,
            $height,
            $this->width,
            $this->height
        );
        imagesavealpha($sparkline, true);
        imagedestroy($this->resource);

        return $sparkline;
    }
@param $width
@param $height

@return resource