background grid

include/llmr/map/source.hpp

@@ -37,6 +37,7 @@ public:
 
     bool update();
     void updateMatrices(const TransformState &transform);
+    bool viewportTileParsed();
     void drawClippingMasks();
     size_t getTileCount() const;
     void render(const LayerDescription& layer_desc, const BucketDescription &bucket_desc);