output.html

<!DOCTYPE html>
<html lang="zh-CN">
<head>
  <meta charset="UTF-8" />
  <meta name="viewport" content="width=device-width, initial-scale=1.0" />
  <title>Creative Output</title>
  <link rel="preconnect" href="https://fonts.googleapis.com" />
  <link rel="preconnect" href="https://fonts.gstatic.com" crossorigin />
  <link href="https://fonts.googleapis.com/css2?family=Inter:wght@400;500&display=swap" rel="stylesheet" />
  <style>
    * { margin: 0; padding: 0; box-sizing: border-box; }
    body {
      background: #000;
      overflow: hidden;
      font-family: 'Inter', sans-serif;
      width: 100vw;
      height: 100vh;
    }
    canvas {
      display: block;
      width: 100%;
      height: 100%;
    }
    #fullscreen-btn {
      position: fixed;
      top: 12px;
      right: 12px;
      z-index: 100;
      background: rgba(255,255,255,0.1);
      backdrop-filter: blur(10px);
      border: 1px solid rgba(255,255,255,0.15);
      color: #fff;
      padding: 8px 14px;
      border-radius: 8px;
      cursor: pointer;
      font-size: 13px;
      font-family: 'Inter', sans-serif;
      transition: all 0.2s ease;
      opacity: 0;
    }
    body:hover #fullscreen-btn { opacity: 1; }
    #fullscreen-btn:hover {
      background: rgba(255,255,255,0.2);
      transform: scale(1.05);
    }
  </style>
</head>
<body>
  <canvas id="output-canvas"></canvas>
  <button id="fullscreen-btn">⛶ 全屏</button>
  <script type="module">
    const canvas = document.getElementById('output-canvas');
    const ctx = canvas.getContext('2d');
    const fsBtn = document.getElementById('fullscreen-btn');

    function resize() {
      canvas.width = window.innerWidth;
      canvas.height = window.innerHeight;
    }
    window.addEventListener('resize', resize);
    resize();

    // Fullscreen toggle
    fsBtn.addEventListener('click', () => {
      if (!document.fullscreenElement) {
        document.documentElement.requestFullscreen();
      } else {
        document.exitFullscreen();
      }
    });

    // Listen for render data from parent
    window.addEventListener('message', (e) => {
      if (e.data && e.data.type === 'render') {
        const img = new Image();
        img.onload = () => {
          ctx.clearRect(0, 0, canvas.width, canvas.height);
          ctx.drawImage(img, 0, 0, canvas.width, canvas.height);
        };
        img.src = e.data.dataUrl;
      }
    });

    // Notify parent we're ready
    if (window.opener) {
      window.opener.postMessage({ type: 'output-ready', windowId: new URLSearchParams(location.search).get('id') }, '*');
    }
  </script>
</body>
</html>