[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.

1 files changed, 7 insertions, 0 deletions

diff --git a/src/mbgl/renderer/sources/render_geojson_source.hpp b/src/mbgl/renderer/sources/render_geojson_source.hpp
index 6351c5f6f8..c23559c09a 100644
--- a/src/mbgl/renderer/sources/render_geojson_source.hpp
+++ b/src/mbgl/renderer/sources/render_geojson_source.hpp
@@ -13,6 +13,7 @@ class GeoJSONData;
 class RenderGeoJSONSource : public RenderSource {
 public:
     RenderGeoJSONSource(Immutable<style::GeoJSONSource::Impl>);
+    ~RenderGeoJSONSource() final;
 
     bool isLoaded() const final;
 
@@ -37,6 +38,12 @@ public:
     std::vector<Feature>
     querySourceFeatures(const SourceQueryOptions&) const final;
 
+    FeatureExtensionValue
+    queryFeatureExtensions(const Feature& feature,
+                           const std::string& extension,
+                           const std::string& extensionField,
+                           const optional<std::map<std::string, Value>>& args) const final;
+
     void reduceMemoryUse() final;
     void dumpDebugLogs() const final;