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Merge pull request #437 from twpayne/throttle-image-loads

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Throttle image requests
This commit is contained in:
Tom Payne
2013-04-05 07:24:13 -07:00
parent 3b416c485b 0e12d16c37
commit bcdff5a011
2 changed files with 27 additions and 7 deletions
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18
src/ol/map.js
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@@ -77,6 +77,18 @@ ol.ENABLE_DOM = true;
ol.ENABLE_WEBGL = true;
/**
* @define {number} Maximum number of simultaneously loading tiles.
*/
ol.MAXIMUM_TILES_LOADING = 8;
/**
* @define {number} Maximum new tile loads per frame.
*/
ol.MAXIMUM_NEW_TILE_LOADS_PER_FRAME = 2;
/**
* @enum {string}
*/
@@ -273,7 +285,9 @@ ol.Map = function(mapOptions) {
* @private
* @type {ol.TileQueue}
*/
this.tileQueue_ = new ol.TileQueue(goog.bind(this.getTilePriority, this),
this.tileQueue_ = new ol.TileQueue(
ol.MAXIMUM_TILES_LOADING,
goog.bind(this.getTilePriority, this),
goog.bind(this.handleTileChange_, this));
goog.events.listen(this, ol.Object.getChangedEventType(ol.MapProperty.VIEW),
@@ -555,7 +569,7 @@ ol.Map.prototype.handleMapBrowserEvent = function(mapBrowserEvent) {
*/
ol.Map.prototype.handlePostRender = function() {
this.tileQueue_.reprioritize(); // FIXME only call if needed
this.tileQueue_.loadMoreTiles();
this.tileQueue_.loadMoreTiles(ol.MAXIMUM_NEW_TILE_LOADS_PER_FRAME);
var postRenderFunctions = this.postRenderFunctions_;
var i;