title: Is it possible to get this "chroma-shift" effect with OpenGL shaders
body: <p>I'd like to be able to produce this effect, to be specific, the color-crawl / color-shift.</p>
  
  <p><img src="https://i.stack.imgur.com/SL7SA.png" alt="color shift"></p>
  
  <p>Is this possible with OpenGL shaders, or do I need to use another technique?</p>
  
  <p>I'm new to OpenGL and I'd like try this as a getting started exercise, however if there's a better way of doing this, ultimately I want to produce this effect.</p>
  
  <p>FYI I'm using Cinder as my OpenGL framework.</p>
  
  <p>I know this isn't much information, but I'm having trouble even finding out what this effect is really called, so I can't google it.</p>