..--..--../Jpegless.html at main · FrankSx/..--..--.. · GitHub

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<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<title>Endless JPEG</title>
<meta name="color-scheme" content="dark">
<style>
  :root { color-scheme: dark; }
  * { box-sizing: border-box; }
  html, body {
    height: 100%;
    margin: 0;
    background: #000;
    color: #e5e7eb;
    overflow: hidden;
    font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono", monospace;
  }
  #stage {
    position: fixed;
    inset: 0;
    width: 100vw;
    height: 100vh;
    background: #050508;
  }
  #stage image {
    width: 100%;
    height: 100%;
    transform: scale(1.02);
    filter: contrast(1.05) saturate(1.1);
    image-rendering: auto;
  }
  .hud {
    position: fixed;
    top: 20px;
    left: 20px;
    z-index: 10;
    background: rgba(6,6,10,0.72);
    border: 1px solid rgba(255,255,255,0.08);
    border-radius: 16px;
    padding: 14px 16px 12px;
    min-width: 230px;
    backdrop-filter: blur(18px) saturate(140%);
    -webkit-backdrop-filter: blur(18px) saturate(140%);
    box-shadow: 0 10px 30px rgba(0,0,0,0.55), inset 0 1px 0 rgba(255,255,255,0.04);
  }
  .title {
    font-weight: 600;
    letter-spacing: 0.14em;
    font-size: 13px;
    margin-bottom: 12px;
    color: #fafafa;
    display: flex;
    align-items: center;
    gap: 8px;
  }
  .title span {
    color: #9ca3af;
    font-weight: 400;
    letter-spacing: 0.1em;
  }
  .dot {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background: #ef4444;
    box-shadow: 0 0 10px #ef4444aa;
    animation: pulse 1.8s infinite;
  }
  @keyframes pulse {
    0%,100% { opacity: 1; transform: scale(1); }
    50% { opacity: 0.6; transform: scale(0.85); }
  }
  .grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 10px 16px;
  }
  .grid > div {
    display: flex;
    flex-direction: column;
    gap: 3px;
  }
  label {
    font-size: 10px;
    text-transform: uppercase;
    letter-spacing: 0.08em;
    color: #71717a;
  }
  value {
    font-size: 15px;
    color: #f4f4f5;
    font-variant-numeric: tabular-nums;
  }
  .pipeline {
    margin-top: 12px;
    padding-top: 10px;
    border-top: 1px solid rgba(255,255,255,0.07);
    font-size: 10px;
    color: #7a7a82;
    letter-spacing: 0.04em;
    line-height: 1.4;
  }
  .vignette {
    position: fixed;
    inset: 0;
    pointer-events: none;
    background: radial-gradient(ellipse at center, transparent 55%, rgba(0,0,0,0.7) 100%);
    z-index: 5;
  }
  .grain {
    position: fixed;
    inset: -20%;
    pointer-events: none;
    z-index: 6;
    opacity: 0.035;
    mix-blend-mode: screen;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='160' height='160'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='3' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)'/%3E%3C/svg%3E");
    animation: drift 8s linear infinite;
  }
  @keyframes drift { to { transform: translate(10%,10%); } }
  @media (max-width: 640px) {
    .hud { top: 12px; left: 12px; right: 12px; min-width: 0; padding: 12px 14px; }
    .grid { gap: 8px 12px; }
  }
</style>
</head>
<body>
  <!-- Fullscreen SVG stage -->
  <svg id="stage" xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink" viewBox="0 0 1920 1080" preserveAspectRatio="xMidYMid slice">
    <image id="jpeg" x="0" y="0" width="1920" height="1080" preserveAspectRatio="xMidYMid slice"/>
  </svg>

  <div class="vignette"></div>
  <div class="grain"></div>

  <div class="hud" aria-live="polite">
    <div class="title"><span class="dot"></span>ENDLESS <span>· JPEG</span></div>
    <div class="grid">
      <div><label>FPS</label><value id="fps">0</value></div>
      <div><label>Frame</label><value id="frame">0</value></div>
      <div><label>Size</label><value><span id="size">0</span> KB</value></div>
      <div><label>Res</label><value id="res">0×0</value></div>
    </div>
    <div class="pipeline">canvas → toDataURL('image/jpeg',0.8) → svg:image[href] → html</div>
  </div>

<script>
/*
ENDLESS JPEG
How it works (the pipeline):
1. CANVAS: An offscreen HTMLCanvas draws evolving generative art each tick (flowing plasma noise)
2. JPEG:  canvas.toDataURL('image/jpeg', 0.8) encodes the current pixels to a JPEG data URL
3. SVG:   The data URL is assigned to <svg><image href="..."> – SVG becomes the display surface
4. HTML:  The SVG fills the viewport, so you see a continuously re-compressed JPEG stream

This is intentionally wasteful and beautiful – mimicking a live JPEG encoder.
*/

(() => {
  const svgImage = document.getElementById('jpeg');
  const fpsEl = document.getElementById('fps');
  const frameEl = document.getElementById('frame');
  const sizeEl = document.getElementById('size');
  const resEl = document.getElementById('res');

  // Offscreen canvas (never added to DOM)
  const canvas = document.createElement('canvas');
  const ctx = canvas.getContext('2d', { willReadFrequently: true });
  let imgData;

  // Size the canvas to balance quality vs speed
  function resize() {
    const scale = 0.5;
    const w = Math.max(320, Math.min(640, Math.floor(window.innerWidth * scale)));
    const h = Math.max(180, Math.min(360, Math.floor(window.innerHeight * scale)));
    if (canvas.width !== w || canvas.height !== h) {
      canvas.width = w;
      canvas.height = h;
      imgData = ctx.createImageData(w, h);
      resEl.textContent = `${w}×${h}`;
    }
  }
  const debounce = (fn, ms) => { let t; return (...a) => { clearTimeout(t); t = setTimeout(() => fn(...a), ms); }; };
  window.addEventListener('resize', debounce(resize, 200));
  resize();

  // Generative art: flowing plasma with color shifts
  function drawPlasma(now) {
    const t = now * 0.0004;
    const w = canvas.width, h = canvas.height;
    const data = imgData.data;
    const cx = w * 0.5 + Math.cos(t * 0.7) * w * 0.22;
    const cy = h * 0.5 + Math.sin(t * 0.6) * h * 0.22;

    let i = 0;
    for (let y = 0; y < h; y++) {
      const ny = (y / h) - 0.5;
      for (let x = 0; x < w; x++) {
        const nx = (x / w) - 0.5;
        const dx = x - cx, dy = y - cy;
        const dist = Math.hypot(nx * 1.6, ny * 1.6);

        // Multiple sine layers create organic flow
        let v = Math.sin(x * 0.015 + t * 2.1);
        v += Math.sin(y * 0.018 - t * 1.7);
        v += Math.sin((nx + ny) * 8 + t * 1.3);
        v += Math.sin(dist * 12 - t * 3.2) * 0.8;
        v += Math.cos(Math.atan2(dy, dx) * 2.5 + t * 2.0) * 0.5;
        v *= 0.2;

        // Time-based color rotation
        const r = 128 + 127 * Math.sin(v * Math.PI + t * 1.1);
        const g = 128 + 127 * Math.sin(v * Math.PI + t * 1.1 + 2.094);
        const b = 128 + 127 * Math.sin(v * Math.PI + t * 1.1 + 4.188);

        // Slight banding to emphasize JPEG artifacts
        data[i++] = (r & 0xF8); // floor to 8
        data[i++] = (g & 0xFC); // floor to 4
        data[i++] = (b & 0xF8);
        data[i++] = 255;
      }
    }
    ctx.putImageData(imgData, 0, 0);

    // Add a very subtle feedback blur to smear like JPEG generations
    ctx.globalAlpha = 0.06;
    ctx.globalCompositeOperation = 'screen';
    ctx.drawImage(canvas, 0.5, 0, w, h, 0, 0, w, h);
    ctx.globalAlpha = 1;
    ctx.globalCompositeOperation = 'source-over';
  }

  let lastEmit = 0;
  let frames = 0, lastFpsTime = performance.now(), fps = 0;
  let frameCount = 0;

  function tick(now) {
    requestAnimationFrame(tick);

    // FPS counter
    frames++;
    if (now - lastFpsTime >= 1000) {
      fps = Math.round(frames * 1000 / (now - lastFpsTime));
      frames = 0;
      lastFpsTime = now;
      fpsEl.textContent = fps;
    }

    // Throttle encode to ~12-15 fps to keep it efficient
    if (now - lastEmit < 75) return;
    lastEmit = now;

    drawPlasma(now);
    frameCount++;
    frameEl.textContent = frameCount.toLocaleString();

    // 2. Encode to JPEG
    const jpegUrl = canvas.toDataURL('image/jpeg', 0.8);

    // 3. Push into SVG <image>
    // Set both href and xlink:href for widest support
    svgImage.setAttribute('href', jpegUrl);
    svgImage.setAttributeNS('http://www.w3.org/1999/xlink', 'href', jpegUrl);

    // 4. Update stats
    const kb = ((jpegUrl.length * 3) / 4 / 1024).toFixed(1); // rough base64 size
    sizeEl.textContent = kb;
  }

  // Kick off
  requestAnimationFrame(tick);
})();
</script>
</body>
</html>