atem-html-source/display.html at master · bakedpanda/atem-html-source · GitHub

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<!DOCTYPE html>
<!--
    Copyright (C) 2026  Chris Whitehouse (bakedpanda)

    This program is free software: you can redistribute it and/or modify
    it under the terms of the GNU General Public License as published by
    the Free Software Foundation, either version 3 of the License, or
    (at your option) any later version.

    This program is distributed in the hope that it will be useful,
    but WITHOUT ANY WARRANTY; without even the implied warranty of
    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    GNU General Public License for more details.

    You should have received a copy of the GNU General Public License
    along with this program.  If not, see <https://www.gnu.org/licenses/>.
-->
<html lang="en">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<title>ATEM Display Output</title>
<style>
  * { margin: 0; padding: 0; box-sizing: border-box; }
  html, body {
    width: 100%;
    height: 100%;
    overflow: hidden;
    background: #000;
  }
  #output-frame {
    width: 100%;
    height: 100%;
    position: relative;
    overflow: hidden;
  }
  #user-css { }
  #user-content {
    width: 100%;
    height: 100%;
    position: relative;
    z-index: 1;
  }
  #overlay {
    position: fixed;
    z-index: 100;
    pointer-events: none;
  }
  #overlay.bottom-left  { bottom: 0; left: 0; }
  #overlay.bottom-right { bottom: 0; right: 0; }
  #overlay.top-left     { top: 0; left: 0; }
  #overlay.top-right    { top: 0; right: 0; }
  #overlay.center       { top: 50%; left: 50%; transform: translate(-50%, -50%); }
</style>
</head>
<body>
<div id="output-frame">
  <style id="user-css"></style>
  <div id="user-content"></div>
  <div id="overlay"></div>
</div>

<script>
const WS_URL = `ws://${location.host}`;
let ws;
let reconnectTimer;

function applyConfig(config) {
  const frame = document.getElementById('output-frame');
  const content = document.getElementById('user-content');
  const cssEl = document.getElementById('user-css');
  const overlay = document.getElementById('overlay');

  // Background
  frame.style.background = config.backgroundColor || '#000';

  // Custom CSS
  cssEl.textContent = config.customCss || '';

  // Content mode
  content.innerHTML = '';
  if (config.mode === 'html') {
    content.innerHTML = config.html || '';
  } else if (config.mode === 'image' && config.imageUrl) {
    const img = document.createElement('img');
    img.src = config.imageUrl;
    img.style.cssText = 'width:100%;height:100%;object-fit:contain;';
    content.appendChild(img);
  } else if (config.mode === 'color') {
    // background color already applied above
  }

  // Overlay
  overlay.className = 'overlay ' + (config.overlayPosition || 'bottom-left');
  if (config.overlayEnabled && config.overlayText) {
    overlay.style.cssText = config.overlayStyle || '';
    overlay.textContent = config.overlayText;
    overlay.style.display = 'block';
  } else {
    overlay.style.display = 'none';
  }

  // Resolution hint — Chromium will be launched at the right res,
  // but we note it here for reference
  document.title = `ATEM Output [${config.resolution || '1920x1080'} @ ${config.framerate || '25'}fps]`;
}

function connect() {
  ws = new WebSocket(WS_URL);

  ws.onmessage = (e) => {
    try {
      const msg = JSON.parse(e.data);
      if (msg.type === 'config') applyConfig(msg.config);
    } catch {}
  };

  ws.onclose = () => {
    clearTimeout(reconnectTimer);
    reconnectTimer = setTimeout(connect, 2000);
  };

  ws.onerror = () => ws.close();
}

// Initial load via REST in case WS is slow
fetch('/api/config')
  .then(r => r.json())
  .then(applyConfig)
  .catch(() => {});

connect();
</script>
</body>
</html>