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-<html xmlns="http://www.w3.org/1999/xhtml">
- <head>
- <title>Vector Features Performance Test</title>
- <style type="text/css">
- body {
- font-size: 0.8em;
- }
- p {
- padding-top: 1em;
- }
- #map {
- width: 512px;
- height: 512px;
- border: 1px solid black;
- }
- </style>
-
- <script src="../../lib/Firebug/firebug.js"></script>
- <script src="../../lib/OpenLayers.js"></script>
- <script type="text/javascript">
- var map, vectorLayer, drawFeature, features
-
- var run = 0;
-
- function nextRun() {
- window.setTimeout(function() {
- if (run < 5) {
- vectorLayer.removeFeatures(features);
- }
- }, 900);
-
- window.setTimeout(function(){
- run++;
-
- switch(run) {
- case 1:
- console.log("First run - feature bboxes will be cached");
- map.setCenter(new OpenLayers.LonLat(-22.5, -22.5), 3);
- vectorTestNew()
- break;
- case 2:
- console.log("Test with all features inside extent");
- vectorTestOld();
- break;
- case 3:
- vectorTestNew();
- break;
- case 4:
- console.log("Test with some features outside extent");
- map.setCenter(new OpenLayers.LonLat(-22.5, -22.5), 5);
- vectorTestOld();
- break;
- case 5:
- vectorTestNew();
- break;
- }
- }, 1000);
- }
-
- function vectorTestOld(){
- vectorLayer.renderer.drawFeature = function(feature, style) {
- if(style == null) {
- style = feature.style;
- }
- if (feature.geometry) {
- this.drawGeometry(feature.geometry, style, feature.id);
- }
- };
-
- console.time("addFeaturesOld");
- vectorLayer.addFeatures(features);
- console.timeEnd("addFeaturesOld");
- }
-
- function vectorTestNew() {
- vectorLayer.renderer.drawFeature = OpenLayers.Renderer[vectorLayer.renderer.CLASS_NAME.split(".")[2]].prototype.drawFeature;
-
- console.time("addFeatures");
- vectorLayer.addFeatures(features);
- console.timeEnd("addFeatures");
- }
-
- function init(){
- // allow testing of specific renderers via "?renderer=Canvas", etc
- var renderer = OpenLayers.Util.getParameters(window.location.href).renderer;
- renderer = (renderer) ? [renderer] : OpenLayers.Layer.Vector.prototype.renderers;
-
- map = new OpenLayers.Map('map');
-
- vectorLayer = new OpenLayers.Layer.Vector("Vector Layer", {
- isBaseLayer: true,
- renderers: renderer
- });
-
- map.addLayers([vectorLayer]);
- map.addControl(new OpenLayers.Control.MousePosition());
- map.setCenter(new OpenLayers.LonLat(-22.5, -22.5), 3);
-
- vectorLayer.events.register("featuresadded", this, nextRun);
-
- features = new Array(200);
- var x, y
- for (var i = 0; i < 200; i++) {
- x = -Math.random()*45;
- y = -Math.random()*45;
- features[i] = new OpenLayers.Feature.Vector(
- new OpenLayers.Geometry.LinearRing([
- new OpenLayers.Geometry.Point(
- -Math.random()*5+x, -Math.random()*5+y),
- new OpenLayers.Geometry.Point(
- -Math.random()*5+x, -Math.random()*5+y),
- new OpenLayers.Geometry.Point(
- -Math.random()*5+x, -Math.random()*5+y),
- new OpenLayers.Geometry.Point(
- -Math.random()*5+x, -Math.random()*5+y),
- new OpenLayers.Geometry.Point(
- -Math.random()*5+x, -Math.random()*5+y),
- new OpenLayers.Geometry.Point(
- -Math.random()*5+x, -Math.random()*5+y),
- new OpenLayers.Geometry.Point(
- -Math.random()*5+x, -Math.random()*5+y),
- new OpenLayers.Geometry.Point(
- -Math.random()*5+x, -Math.random()*5+y),
- new OpenLayers.Geometry.Point(
- -Math.random()*5+x, -Math.random()*5+y),
- new OpenLayers.Geometry.Point(
- -Math.random()*5+x, -Math.random()*5+y)
- ]));
-
- }
-
- nextRun();
- }
- </script>
- </head>
- <body onload="init()">
- <h1 id="title">New Rendering - Vector Features Performance Test</h1>
- <div id="map"></div>
- <p>
- This test examines if checking for a feature being inside the visible
- extent before rendering it has an impact on performance. Open the Firebug
- console after running this test (hit F12) to see the results.
- <br/>
- After the performance test, you can drag around the map to see how the new
- vector rendering feels where features get rendered only when they are visible
- inside the map extent.
- </p>
- </body>
-</html>