dom/canvas/test/reftest/1758968-1.html

   1 <canvas id="canvas" width="100" height="100"></canvas>
   2 <script>
   3   var can = document.getElementById('canvas');
   4   var ctx = can.getContext('2d');
   5
   6   ctx.shadowOffsetX = 24;
   7   ctx.shadowOffsetY = 24;
   8   ctx.shadowColor = 'blue';
   9   ctx.shadowBlur = 20;
  10
  11   ctx.rect(0,0,100,50);
  12   ctx.clip();
  13
  14   ctx.fillStyle = 'black';
  15   ctx.fillRect(0,0,40,40);
  16 </script>