title: Is there something special I must know when drawing images in core graphics?
body: <p>Before the retina display came to iOS, I've developed some controls which are drawn using stretchable images and lots of core graphics code.</p>
  
  <p>Now I tested it on a retina display device, and the graphics are misplaced and distorted. Everything else that's loaded with @2x suffix and UIImage imageNamed works fine.</p>
  
  <p>I assume there must be some special considerations when using images in core graphics. For example, I obtain the CGImage from an UIImage very often. </p>
  
  <p>Does anyone know?</p>