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Enable ol.TileRange re-use

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This commit is contained in:
Tom Payne
2013-04-09 15:53:31 +02:00
parent 7a4672d429
commit e30109913e
2 changed files with 26 additions and 15 deletions
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src/ol/tilegrid/xyztilegrid.js
+8 -5
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@@ -42,11 +42,13 @@ goog.inherits(ol.tilegrid.XYZ, ol.tilegrid.TileGrid);
/**
* @inheritDoc
*/
ol.tilegrid.XYZ.prototype.getTileCoordChildTileRange = function(tileCoord) {
ol.tilegrid.XYZ.prototype.getTileCoordChildTileRange =
function(tileCoord, opt_tileRange) {
if (tileCoord.z < this.maxZoom_) {
return new ol.TileRange(
return ol.TileRange.createOrUpdate(
tileCoord.x << 1, tileCoord.y << 1,
tileCoord.x + 1 << 1, tileCoord.y + 1 << 1);
tileCoord.x + 1 << 1, tileCoord.y + 1 << 1,
opt_tileRange);
} else {
return null;
}
@@ -57,8 +59,9 @@ ol.tilegrid.XYZ.prototype.getTileCoordChildTileRange = function(tileCoord) {
* @inheritDoc
*/
ol.tilegrid.XYZ.prototype.forEachTileCoordParentTileRange =
function(tileCoord, callback, opt_obj) {
var tileRange = new ol.TileRange(0, 0, tileCoord.x, tileCoord.y);
function(tileCoord, callback, opt_obj, opt_tileRange) {
var tileRange = ol.TileRange.createOrUpdate(
0, 0, tileCoord.x, tileCoord.y, opt_tileRange);
var z;
for (z = tileCoord.z - 1; z >= 0; --z) {
tileRange.minX = tileRange.maxX >>= 1;