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<!DOCTYPE html>
<html>
<head>
<title>Lottie Filmstrip Capture</title>
<meta charset="utf-8" />
<meta http-equiv="X-UA-Compatible" content="IE=egde,chrome=1">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<script src="/lottie.js" type="text/javascript" charset="utf-8"></script>
<style type="text/css" media="screen">
body,
main,
.anim {
margin: 0;
padding: 0;
}
main {
display: flex;
width: 1000px;
height: 1000px;
flex-flow: row wrap;
}
</style>
</head>
<body>
<main>
<div class=anim></div>
</main>
<script type="text/javascript" charset="utf-8">
(function () {
const TILE_COUNT = 5; // Number of tiles in x or y direction.
const TARGET_SIZE = 1000; // Image size in pixels both x and y direction.
const PATH = '/lottie.json';
// This global is used by puppeteer to determine if all tiles have finished drawing.
window._tileCount = 0;
// First load the animation for just a single tile
// so we can read out some values and calculate what
// the filmstrip should look like.
let anim = lottie.loadAnimation({
container: document.querySelector('.anim'),
renderer: 'svg',
loop: false,
autoplay: true,
path: PATH,
rendererSettings: {
preserveAspectRatio:'xMidYMid meet'
},
});
anim.addEventListener('data_ready', e => {
// Once the first tile is loaded, calculate what
// the filmstrip should look like.
let width = anim.animationData.w;
let height = anim.animationData.h;
let scale = TARGET_SIZE / (TILE_COUNT * Math.max(width, height));
let tileWidth = Math.ceil(scale * width);
let tileHeight = Math.ceil(scale * height);
let inPoint = anim.animationData.ip || 0;
let outPoint = anim.animationData.op || anim.animationData.totalFrames - 1;
let frameStep = (outPoint - inPoint) / (TILE_COUNT * TILE_COUNT - 1);
let main = document.querySelector('main');
let renderer = 'svg';
let hash = window.location.hash;
if (hash) {
renderer = hash.slice(1);
}
// Clear out the first div now that our measurements are done.
main.firstElementChild.remove();
// Add in the 5x5 tiled divs.
for (let i = 0; i < (TILE_COUNT*TILE_COUNT); i++) {
let div = document.createElement('div');
div.classList.add('anim');
div.style.width = tileWidth + 'px';
div.style.height = tileHeight + 'px';
main.appendChild(div);
let frameStop = i * frameStep;
let anim = lottie.loadAnimation({
container: div,
renderer: renderer,
loop: false,
autoplay: true,
path: PATH,
rendererSettings: {
preserveAspectRatio:'xMidYMid meet'
},
});
anim.addEventListener('enterFrame', (e) => {
if (Math.round(anim.currentFrame) >= frameStop) {
anim.pause();
window._tileCount += 1;
}
});
}
});
})();
</script>
</body>
</html>
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