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<!--
Copyright (c) 2019 The Khronos Group Inc.
Use of this source code is governed by an MIT-style license that can be
found in the LICENSE.txt file.
-->
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<title>Test for Timer Query objects with OffscreenCanvas</title>
<link rel="stylesheet" href="../../resources/js-test-style.css"/>
<script src="../../js/js-test-pre.js"></script>
<script src="../../js/webgl-test-utils.js"></script>
</head>
<body>
<div id="description"></div>
<div id="console"></div>
<script id='myWorker' type='text/worker'>
function tick(callback) {
function tickImpl() {
const res = callback();
if (res) {
if (requestAnimationFrame) {
requestAnimationFrame(tickImpl);
} else {
setTimeout(tickImpl, 10);
}
}
}
tickImpl();
}
self.onmessage = function(e) {
let canvas = new OffscreenCanvas(128, 128);
let gl = canvas.getContext("webgl2");
let ext = gl.getExtension("EXT_disjoint_timer_query_webgl2");
if (!ext) {
self.postMessage("PASSED - no EXT_disjoint_timer_query_webgl2 extension - this is legal");
return false;
}
let query = gl.createQuery();
gl.beginQuery(ext.TIME_ELAPSED_EXT, query);
gl.endQuery(ext.TIME_ELAPSED_EXT);
gl.clearColor(0.0, 1.0, 0.0, 1.0);
gl.clear(gl.COLOR_BUFFER_BIT);
tick(function() {
const status = gl.getQueryParameter(query, gl.QUERY_RESULT_AVAILABLE);
if (status) {
self.postMessage("PASSED - timer query object completed successfully on worker");
return false;
} else {
const err = gl.getError();
if (err != 0) {
self.postMessage("FAILED - GL error " + err);
return false;
}
}
return true;
});
};
</script>
<script>
"use strict";
description("This test ensures that timer query objects work with the WebGL 2.0 context created via OffscreenCanvas.");
if (!window.OffscreenCanvas) {
testPassed("No OffscreenCanvas support");
finishTest();
} else {
var blob = new Blob([document.getElementById('myWorker').textContent]);
var worker = new Worker(URL.createObjectURL(blob));
worker.onmessage = function(msg) {
if (msg.data.startsWith("PASSED")) {
testPassed(msg.data);
} else {
testFailed(msg.data);
}
finishTest();
}
worker.postMessage("Start Worker");
}
</script>
</body>
</html>