title: Cut circle out of image with RMagick
body: <p>I want to cut a circle out of an image using rmagick.</p>
  
  <p>Here's an example of what I'd like to be able to accomplish:</p>
  
  <p><a href="https://i.stack.imgur.com/BP20V.jpg" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/BP20V.jpg" alt="http://img375.imageshack.us/img375/1153/walterf.jpg"></a>
   --> <img src="https://i.stack.imgur.com/DFRZj.png" alt="http://img15.imageshack.us/img15/8129/circlethumb.png"></p>
  
  <p>It seems like I want to use <a href="http://studio.imagemagick.org/RMagick/doc/draw.html#circle" rel="nofollow noreferrer">http://studio.imagemagick.org/RMagick/doc/draw.html#circle</a> to cut a circle, and then clip_path to mask it, but the docs aren't very clear. Would anyone be able to point me in the right direction?</p>