title: current transform being applied by canvas
body: <p>How can I determine the current transform that's being applied by an html5 canvas.</p>
  
  <p>It seems that it only supports two methods for dealing with transforms "transform", "setTransform" but I can't seem to discover the results of applying the transforms.</p>
  
  <p>Short of tracking them all myself and duplicating the the matrix mathematics that it must be doing natively, how can I figure out the current transform?</p>