title: Canvas drawing and Retina display: doable?
body: <p>Working with phoneGap implementing drawing with Canvas. The catch we've run into is that canvas expects specific pixel dimensions. This is fine except that the iPhone 4's Retina display, from a CSS/Webkit POV is still 320px wide, even though technically there are 640 actual screen pixels.</p>
  
  <p>Is there anyway to accommodate the retina display using Canvas on Webkit while preserving compatibility with non-retina displays?</p>