title: skew and animate image on canvas
body: <p>I want to skew and animate image on a canvas. I can draw Image on canvas but how to skew and animate it after drawing? How to get reference of the image which is drawn on canvas?</p>
  
  <p>I can draw image on canvas like this</p>
  
  <pre><code>var ctx = document.getElementById('canvas').getContext('2d');
  ctx.drawImage(image, sx, sy, sWidth, sHeight, dx, dy, dWidth, dHeight);
  </code></pre>