only update the render order array when there are changes to tiles

2015-08-20 15:34:32 -04:00
parent 038b65eded
commit fd98607c5f
4 changed files with 27 additions and 21 deletions
--- a/src/mbgl/map/source.cpp
+++ b/src/mbgl/map/source.cpp
@@ -529,9 +529,14 @@ void Source::invalidateTiles(const std::unordered_set<TileID, TileID::Hash>& ids
 }

 void Source::updateTilePtrs() {
-    tilePtrs.clear();
+    std::vector<Tile*> newPtrs;
    for (const auto& pair : tiles) {
-        tilePtrs.push_back(pair.second.get());
+        newPtrs.push_back(pair.second.get());
+    }
+
+    if (tilePtrs != newPtrs) {
+        tilePtrs = newPtrs;
+        emitTileLoaded(true);
    }
 }