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- <!-- Licensed under a BSD license. See license.html for license -->
- <!DOCTYPE html>
- <html>
- <head>
- <meta charset="utf-8">
- <meta name="viewport" content="width=device-width, initial-scale=1.0, user-scalable=yes">
- <title>Three.js - OffscreenCanvas</title>
- <style>
- html, body {
- height: 100%;
- margin: 0;
- }
- #c {
- width: 100%;
- height: 100%;
- display: block;
- }
- #noOffscreenCanvas {
- display: flex;
- width: 100%;
- height: 100%;
- align-items: center;
- justify-content: center;
- background: red;
- color: white;
- }
- </style>
- </head>
- <body>
- <canvas id="c"></canvas>
- <div id="noOffscreenCanvas" style="display:none;">
- <div>no OffscreenCanvas support</div>
- </div>
- </body>
- <script type="module">
- function main() { /* eslint consistent-return: 0 */
- const canvas = document.querySelector( '#c' );
- if ( ! canvas.transferControlToOffscreen ) {
- canvas.style.display = 'none';
- document.querySelector( '#noOffscreenCanvas' ).style.display = '';
- return;
- }
- const offscreen = canvas.transferControlToOffscreen();
- const worker = new Worker( 'offscreencanvas-cubes.js', { type: 'module' } );
- worker.postMessage( { type: 'main', canvas: offscreen }, [ offscreen ] );
- function sendSize() {
- worker.postMessage( {
- type: 'size',
- width: canvas.clientWidth,
- height: canvas.clientHeight,
- } );
- }
- window.addEventListener( 'resize', sendSize );
- sendSize();
- }
- main();
- </script>
- </html>
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