$toWidth = $toWidth !== false ? $toWidth : $this->width;
        $toHeight = $toHeight !== false ? $toHeight : $this->height;

        if($proportional)
        {
            $newHeight = $toHeight;
            $newWidth = round($newHeight / $this->height * $this->width);


            if($newWidth > $toWidth)
            {
                $newWidth = $toWidth;
                $newHeight = round($newWidth / $this->width * $this->height);
            }
        }
        else
        {
            $newWidth = $toWidth;
            $newHeight = $toHeight;
        }

        $newImage = imagecreatetruecolor($newWidth, $newHeight);

        $this->preserveTransparency($newImage);

        imagecopyresampled($newImage, $this->image, 0, 0, 0, 0, $newWidth, $newHeight, $this->width, $this->height);

    public function crop($width, $height, $startX = false, $startY = false)
    {
    	$width = (int) $width;
    	$height = (int) $height;

		//Centered crop
     	$startX = $startX === false ? floor(($this->width - $width) / 2) : intval($startX);
    	$startY = $startY === false ? floor(($this->height - $height) / 2) : intval($startY);

    	//Check dimensions
    	$startX = max(0, min($this->width, $startX));
    	$startY = max(0, min($this->height, $startY));
    	$width = min($width, $this->width - $startX);
    	$height = min($height, $this->height - $startY);


		$newImage = imagecreatetruecolor($width, $height);

		imagecopyresampled($newImage, $this->image, 0, 0, $startX, $startY, $width, $height, $width, $height);

    }