1 files changed, 18 insertions, 0 deletions
diff --git a/src/mbgl/renderer/render_source_observer.hpp b/src/mbgl/renderer/render_source_observer.hpp
new file mode 100644
index 0000000000..792a18db2b
--- /dev/null
+++ b/src/mbgl/renderer/render_source_observer.hpp
@@ -0,0 +1,18 @@
+#pragma once
+
+#include <exception>
+
+namespace mbgl {
+
+class RenderSource;
+class OverscaledTileID;
+
+class RenderSourceObserver {
+public:
+    virtual ~RenderSourceObserver() = default;
+
+    virtual void onTileChanged(RenderSource&, const OverscaledTileID&) {}
+    virtual void onTileError(RenderSource&, const OverscaledTileID&, std::exception_ptr) {}
+};
+
+} // namespace mbgl