title: How do you draw individual pixels on the iPhone?
body: <p>I am interested in making a game that depend on pixels, drawing
  every pixel one at a time.</p>
  
  <p>But I am having an extremely hard time finding barebones source code
  showing how to do this.  Does everything have to go through OpenGL?</p>
  
  <p>I know there is a sample in the devkit, but that does not plot 1 pixel, it plots a big
  circle, and I need 1 pixel mapping.</p>
  
  <p>Is there a barebones sample that allows a simple register of finger
  input and drawing 1 pixel where you hit the screen?</p>