WLED/wled00/data/liveviewws.htm

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<!DOCTYPE html>
<html>
<head>
<meta name="viewport" content="width=device-width, initial-scale=1, minimum-scale=1">
<meta charset="utf-8">
<meta name="theme-color" content="#222222">
<title>WLED Live Preview</title>
<style>
body {
margin: 0;
}
#canv {
background: black;
filter: brightness(175%);
width: 100%;
height: 100%;
position: absolute;
}
</style>
</head>
<body>
<div id="canv" />
<script>
function updatePreview(leds) {
var str = "linear-gradient(90deg,";
var len = leds.length;
for (i = 2; i < len; i+=3) {
str += `rgb(${leds[i]},${leds[i+1]},${leds[i+2]})`;
if (i < len -3) str += ","
}
str += ")";
document.getElementById("canv").style.background = str;
}
function getLiveJson(e) {
try {
if (toString.call(e.data) === '[object ArrayBuffer]') {
let leds = new Uint8Array(event.data);
if (leds[0] != 76) return; //'L'
updatePreview(leds);
}
}
catch (err) {
console.error("Peek WS error:",err);
}
}
var ws = top.window.ws;
if (ws && ws.readyState === WebSocket.OPEN) {
console.info("Peek uses top WS");
ws.send("{'lv':true}");
} else {
console.info("Peek WS opening");
ws = new WebSocket("ws://"+document.location.host+"/ws");
ws.onopen = function () {
console.info("Peek WS open");
ws.send("{'lv':true}");
}
}
ws.binaryType = "arraybuffer";
ws.addEventListener('message',getLiveJson);
</script>
</body>
</html>