title: How do I combine two ore more CIImage
body: <p>How do I combine two or more CIImage into another one. I tried using ciContext.drawImage. How do I get a CGImage from it ?? What I have understood is that I am writing into a context from which I should be able to get an Image. Please let me know if I have understood anything wrong.</p>
  
  <pre><code>let eaglContext = EAGLContext(API: .OpenGLES2)
  let ciContext = CIContext(EAGLContext: eaglContext)
  ciContext.drawImage(firstCIImage, inRect: firstRect, fromRect: secondRect)
  ciContext.drawImage(secondCIImage, inRect: secondRect, fromRect: secondRect)
  </code></pre>