layout/reftests/webm-video/webm-alpha-capture.html

   1 <!DOCTYPE HTML>
   2 <html class="reftest-wait">
   3 <meta charset="utf-8">
   4 <title>Test that if a WebM video has an alpha channel, it is displayed correctly when captured.</title>
   5 <script>
   6 async function runTest() {
   7   const v = document.createElement("video");
   8   document.body.appendChild(v);
   9   const vout = document.createElement("video");
  10   document.body.appendChild(vout);
  11   v.preload = "auto";
  12   v.src = "webm-alpha.webm";
  13   await new Promise(r => v.onloadeddata = r);
  14   vout.srcObject = v.mozCaptureStream();
  15   v.play();
  16   await new Promise(r => vout.onloadeddata = r);
  17   document.documentElement.removeAttribute("class");
  18 }
  19 </script>
  20 <body style="background:grey;" onload="runTest()">
  21 </body>
  22 </html>