Javascriptings/parallax.html at master · methodog/Javascriptings · 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, user-scalable=no" />
	<meta name="apple-mobile-web-app-capable" content="yes">
	<meta name="apple-mobile-web-app-status-bar-style" content="black" />
  <title>iiif Perspective Viewer</title>
  <style type="text/css">
    html, body { height:100%; margin:0; }
    body { background:#000; font:14px/1 helvetica,arial,freesans,sans-serif; }
    .parallaxer { height:100%; width:100%; overflow:hidden; position:relative; left:0; top:0; user-select:none; }
    .parallaxer img { max-height:100%; max-width:100%; margin:auto; position:absolute; left:0; top:0; bottom:0; right:0; }
  </style>
</head>

<body>
<!--
  <img alt="" src="img/parallax/layer2.1.jpg"><img alt="" src="img/parallax/layer2.2.png"><img alt="" src="img/parallax/layer2.3.png"><img alt="" src="img/parallax/layer2.2.png"><img alt="" src="img/parallax/layer2.3.png">
  <img alt="" src="img/parallax/an_artists_studio_01.png"><img alt="" src="img/parallax/an_artists_studio_02.png"><img alt="" src="img/parallax/an_artists_studio_03.png"><img alt="" src="img/parallax/an_artists_studio_04.png"><img alt="" src="img/parallax/an_artists_studio_05.png"><img alt="" src="img/parallax/an_artists_studio_06.png">
-->
<div class="parallaxer js-parallaxer">
  <img alt="" src="img/parallax/small/a_printers_workshop_01.png"><img alt="" src="img/parallax/small/a_printers_workshop_02.png"><img alt="" src="img/parallax/small/a_printers_workshop_03.png"><img alt="" src="img/parallax/small/a_printers_workshop_04.png"><img alt="" src="img/parallax/small/a_printers_workshop_05.png"><img alt="" src="img/parallax/small/a_printers_workshop_06.png">
<!--
  <img alt="" src="img/parallax/Gestetner_01.png">
  <img alt="" src="img/parallax/Gestetner_02.png">
  <img alt="" src="img/parallax/Gestetner_03.png">
  <img alt="" src="img/parallax/Gestetner_04.png">
  <img alt="" src="img/parallax/Gestetner_05.png">
-->
<!--
  <img alt="" src="img/parallax/Gestetner_06.png">
-->
</div>

<script src="img/manifesto.bundle.js"></script>
<script type="text/javascript">
function getComputed(el,style){ if(window.getComputedStyle){ var y=document.defaultView.getComputedStyle(el,null).getPropertyValue(style); }else if(el.currentStyle){ if( style=='width' ){ y=el.getBoundingClientRect().right-el.getBoundingClientRect().left }else if( style=='height' ){ y=el.getBoundingClientRect().bottom-el.getBoundingClientRect().top }else{ var y=el.currentStyle[style] } } return parseFloat(y); }
function getEventXY (e) {
  const xy = [];
  if (e.touches && e.touches.length) {
    if (e.touches.length > 1) {
      xy[0] = (e.touches[0].pageX + e.touches[0].pageX) / 2;
      xy[1] = (e.touches[0].pageY + e.touches[0].pageY) / 2;
    } else {
      xy[0] = e.touches[0].pageX;
      xy[1] = e.touches[0].pageY;
    }
  } else {
    xy[0] = e.pageX;
    xy[1] = e.pageY;
  }
  return xy;
}

const parallaxer = document.querySelector(".js-parallaxer");

const painter = {
  id: 1,
  size: (el) => {
    el.wh = [parseInt(getComputed(el,'width')), Math.ceil(getComputed(el,'height'))];
    el.xy = [parseInt(getComputed(el,'left')), Math.ceil(getComputed(el,'top'))];
  },
  init: (el) => {
    el.imgs = el.getElementsByTagName('img');
    el.scale = 1;
    el.xlate = [0, 0];
    el.pinchDelta = 0;
    if (!el.paint) {
      el.id = el.id || 'parallaxer' + painter.id++;
      el.css = el.parentNode.insertBefore(document.createElement('style'), el);
      el.paint = () => {
        let css = '';
        let scalePlus = 0;
        if (el.scale > 6) { scalePlus = (el.scale - 6) / 30; }
        for (let i = 0; i <= el.imgs.length; i++) {
          css += `#${el.id} :nth-child(${i}){ transform: scale(${.5 + (el.scale * i * i / 100) + scalePlus}) translate(${-el.xlate[0] * i * i}%  , ${-el.xlate[1] * i * i}%); filter:blur(${i * i * el.scale / 300}px) }`;
        }
        window.requestAnimationFrame(() => { el.css.innerHTML = css });
      };
      el.move = (xy) => {
        el.xlate = xy;
      };
      el.zoom = (z) => {
        el.scale += z;
        if (el.scale < 1) {
          el.scale = 1;
        }
        else if (el.scale > 10) {
          el.scale = 10;
        }
      };
      el.paint();
      el.onmousemove = painter.touch.bind(null, el);
      el.onwheel = painter.touch.bind(null, el);
      el.ontouchmove = painter.touch.bind(null, el);
    }
  },
  touch: (el, e) => {
    const xyE = getEventXY(e);
    if (!el.w) { painter.size(el); }
    if (e.type === 'wheel'){
      el.zoom(e.deltaY > 0 ? -1 : 1);
    } else {
      if (e.touches && e.touches.length === 2) {
        const pinchDeltaPrevious = el.pinchDelta;
        el.pinchDelta = Math.sqrt(Math.pow(e.touches[0].pageX - e.touches[1].pageX, 2) + Math.pow(e.touches[0].pageY - e.touches[1].pageY, 2));
        if (pinchDeltaPrevious) {
          el.zoom((el.pinchDelta - pinchDeltaPrevious) / 300);
        }
      } else {
        el.move([(xyE[0] - (el.xy[0] + (el.wh[0] / 2))) / el.wh[0], (xyE[1] - (el.xy[1] + (el.wh[1] / 2))) / el.wh[1]]);
      }
    }
    el.paint();
  }
};

const qstr = new Map(location.search.slice(1).split('&').map(kv => kv.split('=')));
if (!qstr.has('manifest')) {
  console.log('try ?manifest=img/parallax/manifest_peepshow.p3.json');
  painter.init(parallaxer);
} else {
  parallaxer.innerHTML = '';
  manifesto.loadManifest(qstr.get('manifest')).then((manifest) => {
    const m = manifesto.create(manifest);
    const cvs = m.getSequences()[0].getCanvases();
    Array.from(cvs.reverse(), (cv) => {
      const im = parallaxer.appendChild(document.createElement('img'));
      if (cv.getImages().length) {
        // P2 manifest
        im.src = `${cv.getImages()[0].getResource().id.replace(/full\/full/, 'full/1200,')}.png`;
      } else if (cv.getContent().length) {
        // P3 manifest
        im.src = `${cv.getContent()[0].getBody()[0].id.replace(/full\/full/, 'full/1200,')}.png`;
      }
      painter.init(parallaxer);
    });
  });
}
</script>
</body>
</html>