Adding dynamic images to PDF File

[redbrad0]

I have the following code to add a image to a PDF file, but this is a static image. How can I add a dynamic image that is either generated by calling a URL or a PHP class that generates the PNG code?

 

Code to add static image

$this->image('/home/public_html/images/Logo_white.png', 420, 4, 150, 0, null, null);