From 591af0021bfb8b9fdfd803b55fb6c18a24c46943 Mon Sep 17 00:00:00 2001
From: John Firebaugh <john.firebaugh@gmail.com>
Date: Tue, 30 May 2017 13:40:36 -0700
Subject: [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
---
 include/mbgl/style/data_driven_property_value.hpp | 4 ++++
 include/mbgl/style/property_value.hpp             | 4 ++++
 2 files changed, 8 insertions(+)

(limited to 'include/mbgl/style')

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
-- 
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