third_party/webxr_test_pages/webxr-samples/mirroring.html - chromium/src - Git at Google

 <!doctype html>
 <!--
 Copyright 2018 The Immersive Web Community Group

 Permission is hereby granted, free of charge, to any person obtaining a copy of
 this software and associated documentation files (the "Software"), to deal in
 the Software without restriction, including without limitation the rights to
 use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of
 the Software, and to permit persons to whom the Software is furnished to do so,
 subject to the following conditions:

 The above copyright notice and this permission notice shall be included in all
 copies or substantial portions of the Software.

 THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS
 FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR
 COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER
 IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
 CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
 -->
 <html>
   <head>
     <meta charset='utf-8'>
     <meta name='viewport' content='width=device-width, initial-scale=1, user-scalable=no'>
     <meta name='mobile-web-app-capable' content='yes'>
     <meta name='apple-mobile-web-app-capable' content='yes'>

     <!-- Origin Trial Token, feature = WebXR Device API, origin = https://immersive-web.github.io, expires = 2018-08-28 -->
 <meta http-equiv="origin-trial" data-feature="WebXR Device API" data-expires="2018-08-28" content="AnNpu7ceXvLew05ccD8Zr1OZsdZiB2hLQKK82kTTMDwF7oRKtP3QEJ4RzkeHrmB8Sq0vSV6ZNmszpBCZ0I8p9gAAAABceyJvcmlnaW4iOiJodHRwczovL2ltbWVyc2l2ZS13ZWIuZ2l0aHViLmlvOjQ0MyIsImZlYXR1cmUiOiJXZWJYUkRldmljZSIsImV4cGlyeSI6MTUzNTQxNDQwMH0=">

     <title>Mirroring</title>

     <link href='css/common.css' rel='stylesheet'></link>

     <!--The polyfill is not needed for browser that have native API support,
         but is linked by these samples for wider compatibility.-->
     <!--script src='https://cdn.jsdelivr.net/npm/webxr-polyfill@latest/build/webxr-polyfill.js'></script-->
     <script src='js/webxr-polyfill.js'></script>

     <script src='js/webxr-button.js'></script>
   </head>
   <body>
     <header>
       <details open>
         <summary>Mirroring</summary>
         <p>
           This sample demonstrates how to present a simple WebGL scene to a
           XRDevice while mirroring to a context. The scene is not rendered to
           the page prior to XR presentation. Mirroring has no effect on mobile
           or standalone devices.
           <a class="back" href="./">Back</a>
         </p>
       </details>
     </header>
     <main style='text-align: center;'>
       <p>Click 'Enter XR' to see content</p>
     </main>
     <script type="module">
       import {Scene} from './js/cottontail/src/scenes/scene.js';
       import {Renderer, createWebGLContext} from './js/cottontail/src/core/renderer.js';
       import {Gltf2Node} from './js/cottontail/src/nodes/gltf2.js';
       import {QueryArgs} from './js/cottontail/src/util/query-args.js';
       import {SkyboxNode} from './js/cottontail/src/nodes/skybox.js';

       // If requested, initialize the WebXR polyfill
       if (QueryArgs.getBool('allowPolyfill', false)) {
         var polyfill = new WebXRPolyfill();
       }

       // XR globals.
       let xrButton = null;
       let xrRefSpace = null;

       // WebGL scene globals.
       let gl = null;
       let renderer = null;
       let scene = new Scene();
       scene.addNode(new Gltf2Node({url: '../media/gltf/space/space.gltf'}));
       scene.addNode(new SkyboxNode({url: '../media/textures/milky-way-4k.png'}));

       function initXR() {
         xrButton = new XRDeviceButton({
           onRequestSession: onRequestSession,
           onEndSession: onEndSession,
           supportedSessionTypes: ['immersive-vr']
         });
         document.querySelector('header').appendChild(xrButton.domElement);
       }

       function onRequestSession() {
         navigator.xr.requestSession('immersive-vr').then((session) => {
           // In order to mirror an exclusive session, we must provide
           // an XRPresentationContext, which indicates the canvas that will
           // contain results of the session's rendering.
           let outputCanvas = document.createElement('canvas');

           // Add the canvas to the document.
           document.body.appendChild(outputCanvas);

           // Providing an outputContext to an exclusive session indicates that
           // it should be used as the mirror destination.
           session.updateRenderState({ outputContext: outputCanvas.getContext('xrpresent') });
           onSessionStarted(session);
         });
       }

       function onSessionStarted(session) {
         xrButton.setSession(session);

         session.addEventListener('end', onSessionEnded);

         if (!gl) {
           gl = createWebGLContext({
             xrCompatible: true
           });

           renderer = new Renderer(gl);

           scene.setRenderer(renderer);
         }

         session.updateRenderState({ baseLayer: new XRWebGLLayer(session, gl) });

         session.requestReferenceSpace({ type: 'stationary', subtype: 'eye-level' }).then((refSpace) => {
           xrRefSpace = refSpace;

           session.requestAnimationFrame(onXRFrame);
         });
       }

       function onEndSession(session) {
         session.end();
       }

       function onSessionEnded(event) {
         xrButton.setSession(null);

         // Remove the output canvas from the document.
         if (event.session.renderState.outputContext) {
           document.body.removeChild(event.session.renderState.outputContext.canvas);
         }

         gl = null;
       }

       function onXRFrame(t, frame) {
         let session = frame.session;

         scene.startFrame();

         session.requestAnimationFrame(onXRFrame);

         let pose = frame.getViewerPose(xrRefSpace);

         if (pose) {
           gl.bindFramebuffer(gl.FRAMEBUFFER, session.renderState.baseLayer.framebuffer);
           gl.clear(gl.COLOR_BUFFER_BIT | gl.DEPTH_BUFFER_BIT);

           for (let view of pose.views) {
             let viewport = session.renderState.baseLayer.getViewport(view);
             gl.viewport(viewport.x, viewport.y,
                         viewport.width, viewport.height);

             scene.draw(view.projectionMatrix, view.transform.inverse.matrix);
           }
         }

         // Per-frame scene teardown. Nothing WebXR specific here.
         scene.endFrame();
       }

       // Start the XR application.
       initXR();
     </script>
   </body>
 </html>
	<!doctype html>
	<!--
	Copyright 2018 The Immersive Web Community Group

	Permission is hereby granted, free of charge, to any person obtaining a copy of
	this software and associated documentation files (the "Software"), to deal in
	the Software without restriction, including without limitation the rights to
	use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of
	the Software, and to permit persons to whom the Software is furnished to do so,
	subject to the following conditions:

	The above copyright notice and this permission notice shall be included in all
	copies or substantial portions of the Software.

	THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
	IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS
	FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR
	COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER
	IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
	CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
	-->
	<html>
	<head>
	<meta charset='utf-8'>
	<meta name='viewport' content='width=device-width, initial-scale=1, user-scalable=no'>
	<meta name='mobile-web-app-capable' content='yes'>
	<meta name='apple-mobile-web-app-capable' content='yes'>

	<!-- Origin Trial Token, feature = WebXR Device API, origin = https://immersive-web.github.io, expires = 2018-08-28 -->
	<meta http-equiv="origin-trial" data-feature="WebXR Device API" data-expires="2018-08-28" content="AnNpu7ceXvLew05ccD8Zr1OZsdZiB2hLQKK82kTTMDwF7oRKtP3QEJ4RzkeHrmB8Sq0vSV6ZNmszpBCZ0I8p9gAAAABceyJvcmlnaW4iOiJodHRwczovL2ltbWVyc2l2ZS13ZWIuZ2l0aHViLmlvOjQ0MyIsImZlYXR1cmUiOiJXZWJYUkRldmljZSIsImV4cGlyeSI6MTUzNTQxNDQwMH0=">

	<title>Mirroring</title>

	<link href='css/common.css' rel='stylesheet'></link>

	<!--The polyfill is not needed for browser that have native API support,
	but is linked by these samples for wider compatibility.-->
	<!--script src='https://cdn.jsdelivr.net/npm/webxr-polyfill@latest/build/webxr-polyfill.js'></script-->
	<script src='js/webxr-polyfill.js'></script>

	<script src='js/webxr-button.js'></script>
	</head>
	<body>
	<header>
	<details open>
	<summary>Mirroring</summary>
	<p>
	This sample demonstrates how to present a simple WebGL scene to a
	XRDevice while mirroring to a context. The scene is not rendered to
	the page prior to XR presentation. Mirroring has no effect on mobile
	or standalone devices.
	<a class="back" href="./">Back</a>
	</p>
	</details>
	</header>
	<main style='text-align: center;'>
	<p>Click 'Enter XR' to see content</p>
	</main>
	<script type="module">
	import {Scene} from './js/cottontail/src/scenes/scene.js';
	import {Renderer, createWebGLContext} from './js/cottontail/src/core/renderer.js';
	import {Gltf2Node} from './js/cottontail/src/nodes/gltf2.js';
	import {QueryArgs} from './js/cottontail/src/util/query-args.js';
	import {SkyboxNode} from './js/cottontail/src/nodes/skybox.js';

	// If requested, initialize the WebXR polyfill
	if (QueryArgs.getBool('allowPolyfill', false)) {
	var polyfill = new WebXRPolyfill();
	}

	// XR globals.
	let xrButton = null;
	let xrRefSpace = null;

	// WebGL scene globals.
	let gl = null;
	let renderer = null;
	let scene = new Scene();
	scene.addNode(new Gltf2Node({url: '../media/gltf/space/space.gltf'}));
	scene.addNode(new SkyboxNode({url: '../media/textures/milky-way-4k.png'}));

	function initXR() {
	xrButton = new XRDeviceButton({
	onRequestSession: onRequestSession,
	onEndSession: onEndSession,
	supportedSessionTypes: ['immersive-vr']
	});
	document.querySelector('header').appendChild(xrButton.domElement);
	}

	function onRequestSession() {
	navigator.xr.requestSession('immersive-vr').then((session) => {
	// In order to mirror an exclusive session, we must provide
	// an XRPresentationContext, which indicates the canvas that will
	// contain results of the session's rendering.
	let outputCanvas = document.createElement('canvas');

	// Add the canvas to the document.
	document.body.appendChild(outputCanvas);

	// Providing an outputContext to an exclusive session indicates that
	// it should be used as the mirror destination.
	session.updateRenderState({ outputContext: outputCanvas.getContext('xrpresent') });
	onSessionStarted(session);
	});
	}

	function onSessionStarted(session) {
	xrButton.setSession(session);

	session.addEventListener('end', onSessionEnded);

	if (!gl) {
	gl = createWebGLContext({
	xrCompatible: true
	});

	renderer = new Renderer(gl);

	scene.setRenderer(renderer);
	}

	session.updateRenderState({ baseLayer: new XRWebGLLayer(session, gl) });

	session.requestReferenceSpace({ type: 'stationary', subtype: 'eye-level' }).then((refSpace) => {
	xrRefSpace = refSpace;

	session.requestAnimationFrame(onXRFrame);
	});
	}

	function onEndSession(session) {
	session.end();
	}

	function onSessionEnded(event) {
	xrButton.setSession(null);

	// Remove the output canvas from the document.
	if (event.session.renderState.outputContext) {
	document.body.removeChild(event.session.renderState.outputContext.canvas);
	}

	gl = null;
	}

	function onXRFrame(t, frame) {
	let session = frame.session;

	scene.startFrame();

	session.requestAnimationFrame(onXRFrame);

	let pose = frame.getViewerPose(xrRefSpace);

	if (pose) {
	gl.bindFramebuffer(gl.FRAMEBUFFER, session.renderState.baseLayer.framebuffer);
	gl.clear(gl.COLOR_BUFFER_BIT \| gl.DEPTH_BUFFER_BIT);

	for (let view of pose.views) {
	let viewport = session.renderState.baseLayer.getViewport(view);
	gl.viewport(viewport.x, viewport.y,
	viewport.width, viewport.height);

	scene.draw(view.projectionMatrix, view.transform.inverse.matrix);
	}
	}

	// Per-frame scene teardown. Nothing WebXR specific here.
	scene.endFrame();
	}

	// Start the XR application.
	initXR();
	</script>
	</body>
	</html>