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<!DOCTYPE html>
<meta charset='UTF-8'>
<!-- Viewport size change in WebGL and submit it to the VR device as a base64 image.
If this fails, something is seriously wrong. -->
<html class="reftest-wait">
<head>
<script type='text/javascript' src='webgl-util.js'></script>
<script type='text/javascript' src="VRSimulationDriver.js"></script>
<script id="vs" type="x-shader/x-vertex">
attribute vec2 aVertCoord;
void main(void) {
gl_Position = vec4(aVertCoord, 0.0, 1.0);
}
</script>
<script id="fs" type="x-shader/x-fragment">
precision mediump float;
void main(void) {
gl_FragColor = vec4(1.0, 0.0, 0.0, 1.0);
}
</script>
<script type='text/javascript'>
'use strict';
var submitResult = null;
var vrDisplay = null;
var webglCanvas = null;
var gl = null;
var prog = null;
var img = null;
// The resolution is 540 : 300 (the ratio of 2160 * 1200, like Vive and Oculus)
const eyeWidth = 270;
const eyeHeight = 300;
function setStatus(text) {
var elem = document.getElementById('status');
elem.innerHTML = text;
}
function initVRMock() {
VRServiceTest = navigator.requestVRServiceTest();
if (!VRServiceTest) {
setStatus('VRServiceTest get failed.');
return;
}
VRSimulationDriver.AttachWebVRDisplay().then(() => {
VRSimulationDriver.SetEyeResolution(eyeWidth, eyeHeight);
VRSimulationDriver.UpdateVRDisplay();
}).then(() => {
// Looking for VR displays
if (navigator.getVRDisplays) {
submitResult = new VRSubmitFrameResult();
navigator.getVRDisplays().then(function (displays) {
if (displays.length > 0) {
window.addEventListener('vrdisplaypresentchange', onVRPresentChange, false);
vrDisplay = displays[0];
vrDisplay.requestPresent([{ source: webglCanvas }]);
vrDisplay.requestAnimationFrame(onAnimationFrame);
}
});
}
});
}
function onVRPresentChange() {
if (vrDisplay && vrDisplay.isPresenting) {
const leftEye = vrDisplay.getEyeParameters("left");
const rightEye = vrDisplay.getEyeParameters("right");
if (leftEye.renderWidth != rightEye.renderWidth ||
leftEye.renderWidth != eyeWidth) {
setStatus('renderWidth is not equal to eyeWidth.');
}
if (leftEye.renderHeight != rightEye.renderHeight ||
leftEye.renderHeight != eyeHeight) {
setStatus('renderHeight is not equal to eyeHeight.');
}
webglCanvas.width = leftEye.renderWidth * 2;
webglCanvas.height = leftEye.renderHeight;
}
}
function onAnimationFrame() {
if (!vrDisplay.isPresenting) {
return;
}
gl.clearColor(0.0, 1.0, 0.0, 1.0);
gl.clear(gl.COLOR_BUFFER_BIT);
// Presenting render a stereo view.
gl.viewport(0, 0, webglCanvas.width * 0.5, webglCanvas.height);
gl.drawArrays(gl.TRIANGLE_STRIP, 0, 4);
gl.viewport(webglCanvas.width * 0.5, 0, webglCanvas.width * 0.5, webglCanvas.height);
gl.drawArrays(gl.TRIANGLE_STRIP, 0, 4);
// Indicate VRDisplay we're done rendering.
vrDisplay.submitFrame();
if (vrDisplay.getSubmitFrameResult(submitResult)) {
if (!img) {
img = document.createElement("img");
img.onload = function(){
// img width will not be eyeWidth * 2 (540), it would
// be 544. It is because D3D11 CopyResource changes
// the destination image size.
if ((img.height == eyeHeight)) {
webglCanvas.style.display = 'none';
vrDisplay.exitPresent();
setTimeout(testComplete, 0);
}
};
img.src = submitResult.base64Image;
document.body.appendChild(img);
} else {
img.src = submitResult.base64Image;
}
}
vrDisplay.requestAnimationFrame(onAnimationFrame);
}
function runTest() {
webglCanvas = document.getElementById('canvas');
gl = webglCanvas.getContext('webgl');
if (!gl) {
setStatus('WebGL context creation failed.');
return;
}
gl.disable(gl.DEPTH_TEST);
prog = WebGLUtil.createProgramByIds(gl, 'vs', 'fs');
if (!prog) {
setStatus('Program linking failed.');
return;
}
prog.aVertCoord = gl.getAttribLocation(prog, "aVertCoord");
var vertCoordArr = new Float32Array([
-0.5, -0.5,
0.5, -0.5,
-0.5, 0.5,
0.5, 0.5,
]);
var vertCoordBuff = gl.createBuffer();
gl.bindBuffer(gl.ARRAY_BUFFER, vertCoordBuff);
gl.bufferData(gl.ARRAY_BUFFER, vertCoordArr, gl.STATIC_DRAW);
gl.useProgram(prog);
gl.enableVertexAttribArray(prog.aVertCoord);
gl.vertexAttribPointer(prog.aVertCoord, 2, gl.FLOAT, false, 0, 0);
initVRMock();
}
function testComplete() {
document.documentElement.removeAttribute("class");
}
</script>
</head>
<body onload='runTest();'>
<canvas id='canvas' width='128' height='128'></canvas>
<div id='status'></div>
</body>
</html>
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