title: What is the difference between the two weston-simple examples?
body: <p>what difference between weston-simple-egl and weston-simple-shm?</p>
  
  <p>1) weston-simple-egl</p>
  
  <p><img src="https://i.stack.imgur.com/AuKgm.jpg" alt="weston-simple-egl"></p>
  
  <p>2) weston-simple-shm</p>
  
  <p><img src="https://i.stack.imgur.com/LCBca.jpg" alt="weston-simple-shm"></p>