tor-browser

The Tor Browser
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offscreencanvas-sync.html (2365B)

      1 <!--
      2 Copyright (c) 2019 The Khronos Group Inc.
      3 Use of this source code is governed by an MIT-style license that can be
      4 found in the LICENSE.txt file.
      5 -->
      6 <!DOCTYPE html>
      7 <html>
      8 <head>
      9 <meta charset="utf-8">
     10 <title>Test for Sync objects with OffscreenCanvas</title>
     11 <link rel="stylesheet" href="../../resources/js-test-style.css"/>
     12 <script src="../../js/js-test-pre.js"></script>
     13 <script src="../../js/webgl-test-utils.js"></script>
     14 </head>
     15 <body>
     16  <div id="description"></div>
     17  <div id="console"></div>
     18  <script id='myWorker' type='text/worker'>
     19  function tick(callback) {
     20      function tickImpl() {
     21          const res = callback();
     22          if (res) {
     23              if (requestAnimationFrame) {
     24                  requestAnimationFrame(tickImpl);
     25              } else {
     26                  setTimeout(tickImpl, 10);
     27              }
     28          }
     29      }
     30 
     31      tickImpl();
     32  }
     33 
     34  self.onmessage = function(e) {
     35      let canvas = new OffscreenCanvas(128, 128);
     36      let gl = canvas.getContext("webgl2");
     37      let sync = gl.fenceSync(gl.SYNC_GPU_COMMANDS_COMPLETE, 0);
     38      gl.clearColor(0.0, 1.0, 0.0, 1.0);
     39      gl.clear(gl.COLOR_BUFFER_BIT);
     40      tick(function() {
     41          const status = gl.getSyncParameter(sync, gl.SYNC_STATUS);
     42          if (status == gl.SIGNALED) {
     43              self.postMessage("PASSED - Sync object signaled successfully from worker");
     44              return false;
     45          } else {
     46              const err = gl.getError();
     47              if (err != 0) {
     48                  self.postMessage("FAILED - GL error " + err);
     49                  return false;
     50              }
     51          }
     52          return true;
     53      });
     54  };
     55  </script>
     56  <script>
     57    "use strict";
     58    description("This test ensures that sync objects work with the WebGL 2.0 context created via OffscreenCanvas.");
     59    if (!window.OffscreenCanvas) {
     60        testPassed("No OffscreenCanvas support");
     61        finishTest();
     62    } else {
     63      var blob = new Blob([document.getElementById("myWorker").textContent]);
     64      var worker = new Worker(URL.createObjectURL(blob));
     65      worker.onmessage = function(msg) {
     66          if (msg.data.startsWith("PASSED")) {
     67              testPassed(msg.data);
     68          } else {
     69              testFailed(msg.data);
     70          }
     71          finishTest();
     72      }
     73      worker.postMessage("Start Worker");
     74    }
     75  </script>
     76 </body>
     77 </html>