title: How can I render an image with Padrino?
body: <p>I need to create image files on-the-fly in my controller with RMagick and send them to browser. Looks like it's very simple, but I can't find a way. I've tried just simply <code>render</code> them, but it fails due to data is binary. I've also tried to use <code>send_data</code>, but Padrino says it doesn't know about such method.</p>
  
  <p>So, what have I missed? How can I solve this problem?</p>