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Factor out updateTileUsage

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This commit is contained in:
Tom Payne
2013-01-17 11:51:38 +01:00
parent 9fbabc3696
commit b880ab80ee
3 changed files with 30 additions and 31 deletions
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26
src/ol/renderer/layerrenderer.js
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@@ -3,6 +3,7 @@ goog.provide('ol.renderer.Layer');
goog.require('goog.events');
goog.require('goog.events.EventType');
goog.require('ol.Object');
goog.require('ol.TileRange');
goog.require('ol.layer.Layer');
goog.require('ol.layer.LayerProperty');
@@ -125,3 +126,28 @@ ol.renderer.Layer.prototype.handleLayerSaturationChange = goog.nullFunction;
* @protected
*/
ol.renderer.Layer.prototype.handleLayerVisibleChange = goog.nullFunction;
/**
* @protected
* @param {Object.<string, Object.<string, ol.TileRange>>} tileUsage Tile usage.
* @param {ol.source.Source} source Source.
* @param {number} z Z.
* @param {ol.TileRange} tileRange Tile range.
*/
ol.renderer.Layer.prototype.updateTileUsage =
function(tileUsage, source, z, tileRange) {
// FIXME should we use tilesToDrawByZ instead?
var sourceKey = goog.getUid(source).toString();
var zKey = z.toString();
if (sourceKey in tileUsage) {
if (z in tileUsage[sourceKey]) {
tileUsage[sourceKey][zKey].extend(tileRange);
} else {
tileUsage[sourceKey][zKey] = tileRange;
}
} else {
tileUsage[sourceKey] = {};
tileUsage[sourceKey][zKey] = tileRange;
}
};