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chore: import upstream snapshot with attribution
2026-07-13 12:58:35 +08:00

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<!doctype html>
<html lang="en">
<head>
<meta charset="UTF-8" />
<meta name="viewport" content="width=1920, height=1080" />
<title>Vignette — Demo</title>
<script src="https://cdn.jsdelivr.net/npm/gsap@3.14.2/dist/gsap.min.js"></script>
<style>
* {
margin: 0;
padding: 0;
box-sizing: border-box;
}
html,
body {
margin: 0;
width: 1920px;
height: 1080px;
overflow: hidden;
background: #000;
}
</style>
</head>
<body>
<div
id="demo"
data-composition-id="vignette-demo"
data-width="1920"
data-height="1080"
data-duration="5"
>
<!-- Backdrop: a layered "cinematic still" — a warm key light at upper-left,
a teal rim light at lower-right, and a soft global glow. The vignette
overlay reads against this so the effect is unambiguous. -->
<div class="demo-bg">
<!-- Subject shapes — a stylized "moon" centered, with subtle haze rings
so the eye has something to anchor on. Without a subject the demo
looks like an abstract gradient and the vignette gets lost. -->
<div class="demo-haze haze-far"></div>
<div class="demo-haze haze-near"></div>
<div class="demo-subject"></div>
<div class="demo-text">
<div class="demo-title">
<span class="ch">V</span><span class="ch">I</span><span class="ch">G</span
><span class="ch">N</span><span class="ch">E</span><span class="ch">T</span
><span class="ch">T</span><span class="ch">E</span>
</div>
<div class="demo-subtitle">Frame the eye. Hold the moment.</div>
</div>
</div>
<!-- The vignette component -->
<div
id="hf-vignette"
style="
position: absolute;
top: 0;
left: 0;
width: 100%;
height: 100%;
pointer-events: none;
z-index: 90;
"
></div>
<style>
.demo-bg {
width: 1920px;
height: 1080px;
background:
radial-gradient(
circle at 22% 28%,
rgba(255, 196, 130, 0.85),
rgba(255, 196, 130, 0) 38%
),
radial-gradient(circle at 78% 78%, rgba(64, 175, 200, 0.55), rgba(64, 175, 200, 0) 42%),
radial-gradient(circle at 50% 50%, #3b2616 0%, #1a0e07 68%, #060403 100%);
position: relative;
overflow: hidden;
font-family: "Inter", "Helvetica Neue", Helvetica, Arial, sans-serif;
}
.demo-haze {
position: absolute;
left: 50%;
top: 50%;
border-radius: 50%;
transform: translate(-50%, -50%) scale(1);
pointer-events: none;
opacity: 0;
}
.haze-far {
width: 1400px;
height: 1400px;
background: radial-gradient(
circle,
rgba(255, 220, 180, 0.18),
rgba(255, 220, 180, 0) 65%
);
filter: blur(40px);
}
.haze-near {
width: 900px;
height: 900px;
background: radial-gradient(
circle,
rgba(255, 240, 210, 0.32),
rgba(255, 240, 210, 0) 60%
);
filter: blur(20px);
}
.demo-subject {
position: absolute;
left: 50%;
top: 50%;
width: 520px;
height: 520px;
border-radius: 50%;
transform: translate(-50%, -50%);
background: radial-gradient(
circle at 35% 32%,
#fff6e0 0%,
#f4c47e 28%,
#b87a3f 62%,
#6b3d1c 88%,
#2a1607 100%
);
box-shadow:
inset -40px -40px 80px rgba(0, 0, 0, 0.55),
0 0 120px rgba(255, 180, 100, 0.35);
opacity: 0;
}
.demo-text {
position: absolute;
left: 0;
right: 0;
bottom: 12%;
display: flex;
flex-direction: column;
align-items: center;
gap: 14px;
pointer-events: none;
/* Sits above the subject in document order; below the vignette in z-index */
z-index: 5;
}
.demo-title {
font-size: 108px;
font-weight: 800;
letter-spacing: 0.18em;
color: #f6ecd0;
text-shadow: 0 4px 24px rgba(0, 0, 0, 0.55);
opacity: 0;
}
.demo-title .ch {
display: inline-block;
}
.demo-subtitle {
font-size: 30px;
font-weight: 400;
letter-spacing: 0.32em;
text-transform: uppercase;
color: rgba(246, 236, 208, 0.72);
opacity: 0;
}
#hf-vignette {
background: radial-gradient(
var(--vignette-shape, ellipse) at center,
transparent var(--vignette-size, 45%),
var(--vignette-color, rgba(0, 0, 0, 0.7)) var(--vignette-edge, 100%)
);
}
</style>
<script>
(function () {
const tl = gsap.timeline({ paused: true });
// Reveal the backdrop subject and haze first so the vignette has
// something to frame. Without a subject the effect reads as a flat
// dark gradient — uninteresting in a still preview.
tl.to(".haze-far", { opacity: 1, duration: 0.8, ease: "power2.out" }, 0.0);
tl.to(".haze-near", { opacity: 1, duration: 0.8, ease: "power2.out" }, 0.15);
tl.to(".demo-subject", { opacity: 1, scale: 1, duration: 1.0, ease: "power3.out" }, 0.1);
// Title + subtitle settle in. The letters settle from wider spacing to their
// resting spacing — the faithful smooth equivalent of a letter-spacing tween is a
// per-glyph x spread (transform, sub-pixel smooth), NOT a uniform scale (which
// would resize the glyphs instead of closing the gaps). letter-spacing holds at
// its CSS resting 0.18em; each glyph starts offset by the extra gap the original
// tween opened — (0.32em 0.18em) × 108px ≈ 15.12px per gap — and converges to 0,
// centered about the word (8 chars → center at index 3.5).
tl.fromTo(
".demo-title",
{ opacity: 0, y: 18 },
{ opacity: 1, y: 0, duration: 1.0, ease: "power3.out" },
0.6,
);
tl.from(
".demo-title .ch",
{ x: (i) => (i - 3.5) * 15.12, duration: 1.0, ease: "power3.out" },
0.6,
);
tl.to(".demo-subtitle", { opacity: 1, duration: 0.8, ease: "power3.out" }, 1.0);
// Vignette: start visibly soft (so viewers see the unframed scene),
// then ramp to a strong cinematic vignette and hold through the
// capture-time peak (~3.0s, picked to match the catalog thumbnail
// sampling at `Math.min(3.0, duration * 0.6)` for duration=5).
gsap.set("#hf-vignette", {
"--vignette-color": "rgba(0, 0, 0, 0.35)",
"--vignette-size": "70%",
"--vignette-edge": "100%",
});
tl.to(
"#hf-vignette",
{
"--vignette-color": "rgba(0, 0, 0, 0.92)",
"--vignette-size": "26%",
duration: 1.6,
ease: "power2.inOut",
},
1.4,
);
// Gentle breathing for the video loop so the effect reads as alive,
// not static. Keeps the still-frame at peak intensity around t≈3s.
tl.to(
"#hf-vignette",
{ "--vignette-size": "32%", duration: 0.9, ease: "sine.inOut" },
3.4,
);
tl.to(
"#hf-vignette",
{ "--vignette-size": "26%", duration: 0.9, ease: "sine.inOut" },
4.3,
);
window.__timelines = window.__timelines || {};
window.__timelines["vignette-demo"] = tl;
})();
</script>
</div>
</body>
</html>