Tests compositor basic rAF operation.
Advanced to 10ms
Advanced to 510ms
Advanced to 1000ms
Elasped time: 1000
Requesting first animation frame
Animation frame callback #1
Advanced to 1100ms
Elasped time: 1100
Animation frame callback #2
Advanced to 1200ms
Elasped time: 1200
Animation frame callback #3
Advanced to 1300ms
Elasped time: 1300
Animation frame callback #4
Advanced to 1400ms
Elasped time: 1400
Animation frame count: 4

Animation frame callback #5
Screenshot size: 800 x 600
Screenshot rgba: 0,0,50,255