901d56f898
Allows for "pixel perfect" liveview instead of diffused view, to better match what's shown at https://kno.wled.ge/features/effects/. This will make it easier to see what the LEDs are doing, although it may not be as accurate a representation for installations with diffused LEDs. Includes fallback to CSS gradient method for browsers that don't support canvas.
138 lines
4.2 KiB
HTML
138 lines
4.2 KiB
HTML
<!DOCTYPE html>
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<html>
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<head>
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<meta name="viewport" content="width=device-width, initial-scale=1, minimum-scale=1">
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<meta charset="utf-8">
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<meta name="theme-color" content="#222222">
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<title>WLED Live Preview</title>
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<style>
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body {
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margin: 0;
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}
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#canv {
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background: black;
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filter: brightness(175%);
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width: 100%;
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height: 100%;
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position: absolute;
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}
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#canvas {
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width: 100%;
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height: 100%;
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position: absolute;
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}
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</style>
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<script>
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var ws;
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var c = document.getElementById('canvas');
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var ctx = c.getContext('2d');
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var tmout = null;
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function setCanvas() {
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c.width = document.documentElement.clientWidth;
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}
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setCanvas();
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function update() // via HTTP (/json/live)
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{
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if (document.hidden) {
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clearTimeout(tmout);
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tmout = setTimeout(update, 250);
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return;
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}
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fetch('./json/live')
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.then(res => {
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if (!res.ok) {
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clearTimeout(tmout);
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tmout = setTimeout(update, 2500);
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}
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return res.json();
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})
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.then(json => {
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var leddata = (data) => "#" + ((data.length > 6) ? data.substring(2) : data);
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var str = "linear-gradient(90deg,";
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var len = json.leds.length;
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if (typeof ctx === "object") { //canvas support
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setCanvas();
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ctx.clearRect(0, 0, c.width, c.height);
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for (i = 0; i < len; i++) {
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ctx.fillStyle = leddata(json.leds[i]);
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ctx.fillRect ( i * c.width / len, 0, c.width, c.height);
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}
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} else { //fallback to gradient method
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for (i = 0; i < len; i++) {
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str += leddata(json.leds[i]) + ((i < len -1) ? "," : "");
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}
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str += ")";
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document.getElementById("canv").style.background = str;
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}
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clearTimeout(tmout);
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tmout = setTimeout(update, 40);
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})
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.catch(function (error) {
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console.error("Peek HTTP error:",error);
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clearTimeout(tmout);
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tmout = setTimeout(update, 2500);
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})
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}
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function S() { // Startup function (onload)
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let wsOn = (window.location.href.indexOf("?ws") > 0);
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if (!wsOn) {update(); return;}
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// Initialize WebSocket connection
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try {
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ws = top.window.ws;
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} catch (e) {}
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if (ws && ws.readyState === WebSocket.OPEN) {
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//console.info("Peek uses top WS");
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ws.send("{'lv':true}");
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} else {
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//console.info("Peek WS opening");
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let l = window.location;
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let pathn = l.pathname;
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let paths = pathn.slice(1,pathn.endsWith('/')?-1:undefined).split("/");
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let url = l.origin.replace("http","ws");
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if (paths.length > 1) {
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url += "/" + paths[0];
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}
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ws = new WebSocket(url+"/ws");
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ws.onopen = function () {
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//console.info("Peek WS open");
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ws.send("{'lv':true}");
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}
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}
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ws.binaryType = "arraybuffer";
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ws.addEventListener('message', (e) => {
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try {
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if (toString.call(e.data) === '[object ArrayBuffer]') {
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let leds = new Uint8Array(event.data);
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if (leds[0] != 76) return; //'L'
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let len = leds.length;
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let start = leds[1]==2 ? 4 : 2; // 1 = 1D, 2 = 1D/2D (leds[2]=w, leds[3]=h)
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let rgb = (i) => `rgb(${leds[i]},${leds[i+1]},${leds[i+2]})`;
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if (typeof ctx === "object") { //canvas support
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setCanvas();
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ctx.clearRect(0, 0, c.width, c.height);
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for (i = start; i < len; i+=3) {
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ctx.fillStyle = rgb(i);
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ctx.fillRect ( (i - start) * c.width / (len - start), 0, c.width, c.height);
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}
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} else { //fallback to gradient method
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let str = "linear-gradient(90deg,";
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for (i = start; i < len; i+=3) {
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str += rgb(i) + ((i < len -3) ? "," : "");
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}
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str += ")";
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document.getElementById("canv").style.background = str;
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}
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}
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} catch (err) {
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console.error("Peek WS error:",err);
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}
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});
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}
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</script>
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</head>
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<body onload="S()">
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<div id="canv"><canvas id="canvas"></canvas></div>
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</body>
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</html>
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