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Commit tile-reuse branch back to trunk. This branch offers numerous performance

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improvements in the form of reduced memory use and lower element creating costs,
hopefully making the OpenLayers code more usable in internet explorer as well
as less of a memory hog in Firefox and other browsers. Additionally, a buffer
is available around the main map grid which allows tiles to be loaded outside
of the viewing area for faster dragging.


git-svn-id: http://svn.openlayers.org/trunk/openlayers@1137 dc9f47b5-9b13-0410-9fdd-eb0c1a62fdaf
This commit is contained in:
crschmidt
2006-08-09 03:47:33 +00:00
parent 51ac2b4acf
commit 0ba7961df4
9 changed files with 194 additions and 105 deletions
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32
lib/OpenLayers/Tile/Image.js
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@@ -10,7 +10,7 @@ OpenLayers.Tile.Image.prototype =
Object.extend( new OpenLayers.Tile(), {
/** @type DOMElement img */
imgDiv:null,
imgDiv: null,
/**
* @constructor
@@ -35,23 +35,45 @@ OpenLayers.Tile.Image.prototype =
/**
*/
draw:function(transparent) {
if (transparent) {
draw:function() {
if (this.layer.alpha) {
this.imgDiv = OpenLayers.Util.createAlphaImageDiv(null,
this.position,
this.size,
this.url,
"absolute");
"absolute",
null,
null,
true);
} else {
this.imgDiv = OpenLayers.Util.createImage(null,
this.position,
this.size,
this.url,
"absolute");
"absolute",
null,
true);
}
this.layer.div.appendChild(this.imgDiv);
},
moveTo: function (bounds, position) {
this.url = this.layer.getURL(bounds);
OpenLayers.Tile.prototype.moveTo.apply(this, arguments);
},
redraw: function () {
this.imgDiv.style.display = "none";
if (this.layer.alpha) {
OpenLayers.Util.modifyAlphaImageDiv(this.imgDiv,
null, this.position, this.size, this.url);
} else {
this.imgDiv.src = this.url;
OpenLayers.Util.modifyDOMElement(this.imgDiv,
null, this.position, this.size) ;
}
},
/** @final @type String */
CLASS_NAME: "OpenLayers.Tile.Image"
}