title: How to draw Pixel Perfectly on iPhone 6 Plus?
body: <p>Given the iPhone 6 Plus is downscaling from 1242x2208 to 1080x1920, and UIKit is doing that, are there other ways of drawing to the screen that permit absolute (pixel perfect) drawing without downscaling?</p>
  
  <p>I imagine, but am not sure, that OpenGL and Metal can draw pixel perfect graphics on iPhone 6 Plus, but don't know how. And am a little confused as to what Core Animation's coordinate systems mean, as I've read elsewhere that it might be able to do pixel perfect drawing, regardless of the Point system.</p>