third_party/WebKit/LayoutTests/fast/canvas/canvas-partial-invalidation-zoomed.html

   1 <!DOCTYPE html>
   2 <html>
   3 <body style="zoom: 1.5">
   4   <p>An all green square should appear below</p>
   5   <canvas id="A" width=300 height=300></canvas>
   6   <script type="text/javascript" charset="utf-8">
   7     if (window.testRunner)
   8         testRunner.waitUntilDone();
   9     var context;
  10
  11     window.onload = function() {
  12       context = document.getElementById("A").getContext("2d");
  13       context.fillStyle = 'red';
  14       context.fillRect(1, 1, 298, 298);
  15       requestAnimationFrame(doUpdate1);
  16     }
  17
  18     function doUpdate1() {
  19       context.fillStyle = 'red';
  20       context.fillRect(1, 1, 298, 298);
  21       // We need to chain 2 rAFs because the first rAF may be called
  22       // before the initial presentation.
  23       requestAnimationFrame(doUpdate2);
  24     }
  25
  26     function doUpdate2() {
  27       context.fillStyle = 'green';
  28       context.fillRect(1, 1, 298, 298);
  29       testRunner.notifyDone();
  30     }
  31
  32   </script>
  33 </body>
  34 </html>