2022-07-26 11:08:26 +02:00
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<!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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</style>
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</head>
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<body>
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2022-07-28 16:13:31 +02:00
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<canvas id="liveviewCanvas">
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LiveView
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</canvas>
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2022-07-26 11:08:26 +02:00
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<script>
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var canvas = document.getElementById('liveviewCanvas');
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2022-07-28 16:13:31 +02:00
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canvas.width = window.innerWidth * 0.98; //remove scroll bars
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canvas.height = window.innerHeight * 0.98; //remove scroll bars
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2022-07-26 11:08:26 +02:00
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var leds = "";
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var matrixWidth = 0;
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var pixelsPerLed = 0;
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// Check for canvas support
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if (canvas.getContext) {
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// Access the rendering context
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var ctx = canvas.getContext('2d');
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//In case of pixels
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// // ImageData object
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// var imageData = ctx.getImageData(0, 0, canvas.width, canvas.height);
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// // One-dimensional array containing the data in the RGBA order
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// var data = imageData.data;
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// function drawLedPixels(x, y, r, g, b, a) { //old
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// // console.log(x, y, r, g, b, a);
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// for (right = 0; right < pixelsPerLed; right++) {
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// for (down = 0; down < pixelsPerLed; down++) {
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// ff = (x * pixelsPerLed + right + (y * pixelsPerLed + down) * matrixWidth * pixelsPerLed) * 4;
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// // if (x==15 && y==15)
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// // console.log("ff=" + x + " * " + pixelsPerLed + " +" + right + " + (" + y + " * " + pixelsPerLed + " +" + down + ") * " + matrixWidth + ") * 4 = " + ff, data.length); //(5*10+1 + (12*10+1) * 16) * 4 = (51 + 121*16) * 4
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// data[ff + 0] = r;
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// data[ff + 1] = g;
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// data[ff + 2] = b;
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// data[ff + 3] = a;
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// }
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// }
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// }
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function drawLedCircles(x, y, r, g, b, a) {
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ctx.fillStyle = `rgb(${r},${g},${b})`;
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ctx.beginPath();
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2022-07-28 16:13:31 +02:00
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ctx.arc(x*pixelsPerLed+pixelsPerLed*0.5, y*pixelsPerLed+pixelsPerLed*0.5, pixelsPerLed*0.4, 0, 2 * Math.PI);
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2022-07-26 11:08:26 +02:00
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ctx.fill();
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}
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function paintLeds() {
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// data represents the Uint8ClampedArray containing the data
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// in the RGBA order [r0, g0, b0, a0, r1, g1, b1, a1, ..., rn, gn, bn, an]
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2022-07-28 16:13:31 +02:00
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for (i = 4; i < leds.length; i+=3) {
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let ff = (i-4)/3;
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2022-07-26 11:08:26 +02:00
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drawLedCircles(ff%matrixWidth, Math.floor(ff/matrixWidth), leds[i], leds[i+1], leds[i+2], 255)
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}
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// ctx.putImageData(imageData, 0, 0); //in case of drawLedPixels
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}
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}
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function updatePreview(ledsp) {
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leds = ledsp;
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2022-07-28 16:13:31 +02:00
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matrixWidth = leds[2];
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matrixHeight = leds[3];
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pixelsPerLed = Math.min(canvas.width / matrixWidth, canvas.height / matrixHeight);
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// console.log(canvas.width, matrixWidth, canvas.height, matrixHeight, pixelsPerLed, leds);
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2022-07-26 11:08:26 +02:00
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paintLeds();
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}
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function getLiveJson(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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2022-07-28 16:13:31 +02:00
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if (leds[0] != 76) return; //'L', set in ws.cpp
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2022-07-26 11:08:26 +02:00
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updatePreview(leds);
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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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var ws;
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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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ws = new WebSocket((window.location.protocol == "https:"?"wss":"ws")+"://"+document.location.host+"/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',getLiveJson);
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</script>
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</body>
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</html>
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