[core] Refactor RenderSource updates

* Eliminate updateBatch in favor of diffing layers and detecting changes to properties upon which layout depends.
* Replace RenderSource::{update,remove,invalidate,reload}Tiles with a single update method
* Replace TilePyramid::{update,remove,invalidate,reload}Tiles with a single update method
* Remove Style& dependency TODO from GeometryTile and TileParameters

2 files changed, 8 insertions, 0 deletions

diff --git a/include/mbgl/style/data_driven_property_value.hpp b/include/mbgl/style/data_driven_property_value.hpp
index 12a369abb1..090ee0f59b 100644
--- a/include/mbgl/style/data_driven_property_value.hpp
+++ b/include/mbgl/style/data_driven_property_value.hpp
@@ -59,6 +59,10 @@ public:
     auto evaluate(const Evaluator& evaluator, TimePoint = {}) const {
         return Value::visit(value, evaluator);
     }
+
+    bool hasDataDrivenPropertyDifference(const DataDrivenPropertyValue<T>& other) const {
+        return *this != other && (isDataDriven() || other.isDataDriven());
+    }
 };
 
 } // namespace style
diff --git a/include/mbgl/style/property_value.hpp b/include/mbgl/style/property_value.hpp
index 5259eecf2a..02d3a31148 100644
--- a/include/mbgl/style/property_value.hpp
+++ b/include/mbgl/style/property_value.hpp
@@ -38,6 +38,10 @@ public:
     auto evaluate(const Evaluator& evaluator, TimePoint = {}) const {
         return Value::visit(value, evaluator);
     }
+
+    bool hasDataDrivenPropertyDifference(const PropertyValue<T>&) const {
+        return false;
+    }
 };
 
 } // namespace style