From a1ca06e304a14582a90b258e817ec6f17d72fb11 Mon Sep 17 00:00:00 2001
From: Alexander Shalamov <alexander.shalamov@mapbox.com>
Date: Wed, 14 Nov 2018 16:30:10 +0200
Subject: [core] Introduce Renderer::queryFeatureExtension API

New interface allows it's users to query additional information about
feature that was provided by qRF interface. This is particularly
useful for clustered features.
---
 src/mbgl/renderer/render_source.hpp | 9 +++++++++
 1 file changed, 9 insertions(+)

(limited to 'src/mbgl/renderer/render_source.hpp')

diff --git a/src/mbgl/renderer/render_source.hpp b/src/mbgl/renderer/render_source.hpp
index dc80cb1dc6..31c26fd09a 100644
--- a/src/mbgl/renderer/render_source.hpp
+++ b/src/mbgl/renderer/render_source.hpp
@@ -4,6 +4,7 @@
 #include <mbgl/tile/tile_observer.hpp>
 #include <mbgl/util/mat4.hpp>
 #include <mbgl/util/geo.hpp>
+#include <mbgl/util/geojson.hpp>
 #include <mbgl/util/feature.hpp>
 #include <mbgl/style/source_impl.hpp>
 #include <mbgl/style/layer_impl.hpp>
@@ -70,6 +71,14 @@ public:
     virtual std::vector<Feature>
     querySourceFeatures(const SourceQueryOptions&) const = 0;
 
+    virtual FeatureExtensionValue
+    queryFeatureExtensions(const Feature&,
+                           const std::string&,
+                           const std::string&,
+                           const optional<std::map<std::string, Value>>&) const {
+        return {};
+    }
+
     virtual void reduceMemoryUse() = 0;
 
     virtual void dumpDebugLogs() const = 0;
-- 
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