third_party/WebKit/ManualTests/canvas-cursor.html

   1 <html>
   2 <body>
   3 This is a test of our ability to convert a canvas to a data url and use it as a cursor. We pass if the cursor animates smoothly and without flickering.<br>
   4 See https://bugs.webkit.org/show_bug.cgi?id=64321.
   5 <canvas id="c" width="40" height="40"></canvas>
   6 <script type="text/javascript">
   7 var icon = new Image;
   8 icon.src = 'resources/drag-image.png'
   9
  10 function drawArrow(angle) {
  11     var canvas = document.getElementById('c');
  12     canvas.width = canvas.width // reset canvas
  13     var ctx = canvas.getContext('2d');
  14
  15     ctx.translate(ctx.canvas.width / 2, ctx.canvas.height / 2);
  16     ctx.rotate(angle);
  17     ctx.drawImage(icon, -icon.width / 2, -icon.height / 2);
  18
  19     var x = 20;//Math.floor(Math.cos(angle) * icon.width / 2) + icon.width / 2;
  20     var y = 20;//Math.floor(Math.sin(angle) * icon.width / 2) + icon.width / 2;
  21
  22     var data = canvas.toDataURL();
  23     if (data)
  24         document.body.style.cursor = 'url('+data+') ' + x + ' ' + y + ', pointer';
  25     else
  26         console.log('failure');
  27 }
  28
  29 (function() {
  30     var angle = 0;
  31     var run = function() {
  32         angle += Math.PI / 16;
  33         drawArrow(angle);
  34         setTimeout(run, 100);
  35     };
  36     run();
  37 })();
  38     drawArrow();
  39 </script>
  40 </body>
  41 </html>