1 files changed, 3 insertions, 0 deletions
diff --git a/src/mbgl/renderer/image_manager.hpp b/src/mbgl/renderer/image_manager.hpp
index 5ed6e237f0..7d5884edc1 100644
--- a/src/mbgl/renderer/image_manager.hpp
+++ b/src/mbgl/renderer/image_manager.hpp
@@ -47,6 +47,7 @@ public:
     void notifyIfMissingImageAdded();
     void reduceMemoryUse();
     void reduceMemoryUseIfCacheSizeExceedsLimit();
+    const std::set<std::string>& getAvailableImages() const;
 
     ImageVersionMap updatedImageVersions;
 
@@ -62,6 +63,8 @@ private:
     std::map<std::string, std::set<ImageRequestor*>> requestedImages;
     std::size_t requestedImagesCacheSize = 0ul;
     ImageMap images;
+    // Mirror of 'ImageMap images;' keys.
+    std::set<std::string> availableImages;
 
     ImageManagerObserver* observer = nullptr;
 };