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120 lines
2.9 KiB
120 lines
2.9 KiB
2 years ago
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<!DOCTYPE html>
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<html lang="en">
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<head>
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<title>three.js webgl - worker - offscreen canvas</title>
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<meta charset="utf-8">
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<meta name="viewport" content="width=device-width, user-scalable=no, minimum-scale=1.0, maximum-scale=1.0">
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<link type="text/css" rel="stylesheet" href="main.css">
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<style>
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body {
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background-color: #fff;
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color: #444;
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}
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a {
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color: #08f;
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}
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canvas {
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display: inline-block;
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}
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#message {
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color: #ff0000;
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display: none;
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}
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#message > a {
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color: #ff0000;
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}
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#container {
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position: absolute;
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top: 50px;
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bottom: 70px;
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width: 100%;
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}
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#ui {
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position: absolute;
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bottom: 20px;
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width: 100%;
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text-align: center;
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}
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#button {
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border: 0;
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padding: 4px 6px;
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background: #dddddd;
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outline: none;
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}
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</style>
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</head>
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<body>
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<div id="info">
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<a href="https://threejs.org" target="_blank" rel="noopener noreferrer">three.js</a> - offscreen canvas (<a href="https://developer.mozilla.org/en-US/docs/Web/API/OffscreenCanvas" target="_blank" rel="noopener noreferrer">about</a>)<br/>
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<p id="message">Your browser does not support OffscreenCanvas. Check the browser support <a href="https://caniuse.com/#feat=offscreencanvas" target="_blank" rel="noopener noreferrer">here</a></p>
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</div>
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<div id="container">
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<canvas id="canvas1" style="width: 50%; height: 100%"></canvas><canvas id="canvas2" style="width: 50%; height: 100%"></canvas>
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</div>
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<div id="ui">
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<button id="button">START JANK</button><br/>
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<span id="result"></span>
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</div>
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<!-- Import maps polyfill -->
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<!-- Remove this when import maps will be widely supported -->
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<script async src="https://unpkg.com/es-module-shims@1.3.6/dist/es-module-shims.js"></script>
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<script type="importmap">
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{
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"imports": {
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"three": "../build/three.module.js",
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"three/addons/": "./jsm/"
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}
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}
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</script>
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<script type="module">
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import initJank from 'three/addons/offscreen/jank.js';
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import init from 'three/addons/offscreen/scene.js';
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// onscreen
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const canvas1 = document.getElementById( 'canvas1' );
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const canvas2 = document.getElementById( 'canvas2' );
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const width = canvas1.clientWidth;
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const height = canvas1.clientHeight;
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const pixelRatio = window.devicePixelRatio;
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init( canvas1, width, height, pixelRatio, './' );
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initJank();
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// offscreen
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if ( 'transferControlToOffscreen' in canvas2 ) {
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const offscreen = canvas2.transferControlToOffscreen();
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const worker = new Worker( 'jsm/offscreen/offscreen.js', { type: 'module' } );
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worker.postMessage( {
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drawingSurface: offscreen,
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width: canvas2.clientWidth,
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height: canvas2.clientHeight,
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pixelRatio: window.devicePixelRatio,
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path: '../../'
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}, [ offscreen ] );
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} else {
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document.getElementById( 'message' ).style.display = 'block';
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}
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</script>
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</body>
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</html>
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