Webgl Tiles

<!--
  示例：OpenLayers WebGL 瓦片图层
  要点：WebGLTile 用 GPU 渲染普通栅格瓦片，可与默认 Canvas 渲染的 TileLayer 切换对比
  依赖：OpenLayers 10.3.1 · jsDelivr CDN
-->
<!DOCTYPE html>
<html lang="zh-CN">
<head>
<meta name="robots" content="noindex,follow">
<meta charset="utf-8">
<meta name="viewport" content="width=device-width, initial-scale=1">
<title>WebGL 瓦片图层</title>
<link rel="stylesheet" href="https://cdn.jsdelivr.net/npm/ol@10.3.1/ol.css">
<style>
  html,body{height:100%;margin:0}
  body{display:flex;flex-direction:column;overflow:hidden;
       font:13px/1.6 -apple-system,"Segoe UI","PingFang SC",sans-serif}
  .bar{flex:0 0 auto;padding:8px 12px;background:#f6f7f9;border-bottom:1px solid #e3e6ea;
       display:flex;gap:10px;align-items:center;flex-wrap:wrap;font-size:12px;color:#58606e}
  .bar label{display:flex;gap:5px;align-items:center;cursor:pointer}
  .bar select,.bar input[type=range]{font-size:12px}
  .bar .val{font-family:ui-monospace,Consolas,monospace;color:#1f5fd0;min-width:44px}
  .bar .sep{width:1px;height:16px;background:#d8dce2}
  #map{flex:1 1 auto;min-height:0;background:#eef0f3}
</style>
</head>
<body>
<div class="bar">
  <label>渲染器
    <select id="renderer">
      <option value="webgl">WebGLTile</option>
      <option value="canvas">TileLayer</option>
    </select>
  </label>
  <span class="sep"></span>
  <span id="info">当前：WebGLTile</span>
</div>
<div id="map"></div>
<script src="https://cdn.jsdelivr.net/npm/ol@10.3.1/dist/ol.js"></script>
<script>
(function () {
  'use strict';

  if (typeof ol === 'undefined') {
    document.getElementById('map').textContent = 'OpenLayers 加载失败，请检查能否访问 cdn.jsdelivr.net';
    return;
  }


  var webglLayer = new ol.layer.WebGLTile({
    source: new ol.source.XYZ({url: 'https://server.arcgisonline.com/ArcGIS/rest/services/World_Street_Map/MapServer/tile/{z}/{y}/{x}', attributions: 'Tiles © Esri'}),
    visible: true
  });

  var canvasLayer = new ol.layer.Tile({
    source: new ol.source.XYZ({url: 'https://server.arcgisonline.com/ArcGIS/rest/services/World_Street_Map/MapServer/tile/{z}/{y}/{x}', attributions: 'Tiles © Esri'}),
    visible: false
  });

  var map = new ol.Map({
    target: 'map',
    layers: [canvasLayer, webglLayer],
    view: new ol.View({
      center: ol.proj.fromLonLat([116.391, 39.907]),
      zoom: 9
    })
  });

  document.getElementById('renderer').addEventListener('change', function (evt) {
    var webgl = evt.target.value === 'webgl';
    webglLayer.setVisible(webgl);
    canvasLayer.setVisible(!webgl);
    document.getElementById('info').textContent =
      '当前：' + (webgl ? 'WebGLTile' : 'TileLayer');
  });

})();
</script>
</body>
</html>