third_party/WebKit/LayoutTests/media/video-canvas-source.html

   1 <html>
   2     <head>
   3         <title>Drawing to canvas using video with source element does not taint canvas</title>
   4         <script src=media-file.js></script>
   5         <script src=video-test.js></script>
   6         <script src="../resources/js-test.js"></script>
   7         <script>
   8             var ctx;
   9             var width;
  10             var height;
  11
  12             function canplaythrough()
  13             {
  14                 width = video.videoWidth / 2;
  15                 height = video.videoHeight / 2;
  16
  17                 ctx = canvas.getContext("2d");
  18                 video.pause();
  19                 ctx.drawImage(video, 0, 0, width, height);
  20                 shouldBeTrue("!!ctx.getImageData(0, 0, width, height)");
  21                 endTest();
  22             }
  23
  24             function start()
  25             {
  26                 description("Test to ensure we don't taint a canvas when drawing from a video the uses source elements rather than the src attribute");
  27                 findMediaElement();
  28                 canvas = document.getElementsByTagName('canvas')[0];
  29                 waitForEvent('canplaythrough', canplaythrough);
  30                 var mediaFile = findMediaFile("video", "content/counting");
  31                 disableFullTestDetailsPrinting();
  32                 runSilently("var source = document.createElement('source'); source.src = '" + mediaFile + "'; video.appendChild(source)");
  33                 enableFullTestDetailsPrinting();
  34             }
  35         </script>
  36     </head>
  37
  38     <body onload="start()" >
  39         <p id="description"></p>
  40         <video controls></video>
  41         <canvas width="160" height="120" ></canvas>
  42         <div id="console"></div>
  43     </body>
  44 </html>