1 files changed, 15 insertions, 0 deletions
diff --git a/include/mbgl/tile/tile_necessity.hpp b/include/mbgl/tile/tile_necessity.hpp
new file mode 100644
index 0000000000..e51bf51d10
--- /dev/null
+++ b/include/mbgl/tile/tile_necessity.hpp
@@ -0,0 +1,15 @@
+#pragma once
+
+namespace mbgl {
+
+// Tiles can have two states: optional or required.
+// - optional means that only low-cost actions should be taken to obtain the data
+//   (e.g. load from cache, but accept stale data)
+// - required means that every effort should be taken to obtain the data (e.g. load
+//   from internet and keep the data fresh if it expires)
+enum class TileNecessity : bool {
+    Optional = false,
+    Required = true,
+};
+
+} // namespace mbgl