dom/canvas/test/webgl-conf/checkout/conformance/offscreencanvas/offscreencanvas-timer-query.html

   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 Timer Query 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("webgl");
  37       let ext = gl.getExtension("EXT_disjoint_timer_query");
  38       if (!ext) {
  39           self.postMessage("PASSED - no EXT_disjoint_timer_query extension - this is legal");
  40           return false;
  41       }
  42       let query = ext.createQueryEXT();
  43       ext.beginQueryEXT(ext.TIME_ELAPSED_EXT, query);
  44       ext.endQueryEXT(ext.TIME_ELAPSED_EXT);
  45       gl.clearColor(0.0, 1.0, 0.0, 1.0);
  46       gl.clear(gl.COLOR_BUFFER_BIT);
  47       tick(function() {
  48           const status = ext.getQueryObjectEXT(query, ext.QUERY_RESULT_AVAILABLE_EXT);
  49           if (status) {
  50               self.postMessage("PASSED - timer query object completed successfully on worker");
  51               return false;
  52           } else {
  53               const err = gl.getError();
  54               if (err != 0) {
  55                   self.postMessage("FAILED - GL error " + err);
  56                   return false;
  57               }
  58           }
  59           return true;
  60       });
  61   };
  62   </script>
  63   <script>
  64     "use strict";
  65     description("This test ensures that timer query objects work with the WebGL 1.0 context created via OffscreenCanvas.");
  66     if (!window.OffscreenCanvas) {
  67         testPassed("No OffscreenCanvas support");
  68         finishTest();
  69     } else {
  70       var blob = new Blob([document.getElementById('myWorker').textContent]);
  71       var worker = new Worker(URL.createObjectURL(blob));
  72       worker.onmessage = function(msg) {
  73           if (msg.data.startsWith("PASSED")) {
  74               testPassed(msg.data);
  75           } else {
  76               testFailed(msg.data);
  77           }
  78           finishTest();
  79       }
  80       worker.postMessage("Start Worker");
  81     }
  82   </script>
  83 </body>
  84 </html>