[core] Invalidate cached tiles of disabled sources on relayout

src/mbgl/style/source_impl.hpp

@@ -51,6 +51,9 @@ public:
     // Removes all tiles (by putting them into the cache).
     void removeTiles();
 
+    // Remove all tiles and clear the cache.
+    void invalidateTiles();
+
     // Request that all loaded tiles re-run the layout operation on the existing source
     // data with fresh style information.
     void reloadTiles();
@@ -92,15 +95,14 @@ public:
     void detach();
 
 protected:
-    void invalidateTiles();
-    void removeStaleTiles(const std::set<OverscaledTileID>&);
-
     Source& base;
     SourceObserver* observer = nullptr;
     std::map<OverscaledTileID, std::unique_ptr<Tile>> tiles;
     TileCache cache;
 
 private:
+    void removeStaleTiles(const std::set<OverscaledTileID>&);
+
     // TileObserver implementation.
     void onTileChanged(Tile&) override;
     void onTileError(Tile&, std::exception_ptr) override;

src/mbgl/style/style.cpp

@@ -279,6 +279,8 @@ void Style::relayout() {
         Source* source = getSource(sourceID);
         if (source && source->baseImpl->enabled) {
             source->baseImpl->reloadTiles();
+        } else if (source) {
+            source->baseImpl->invalidateTiles();
         }
     }
     updateBatch.sourceIDs.clear();