1 files changed, 15 insertions, 0 deletions
diff --git a/src/mbgl/renderer/tile_mask.hpp b/src/mbgl/renderer/tile_mask.hpp
new file mode 100644
index 0000000000..5f24d63ba4
--- /dev/null
+++ b/src/mbgl/renderer/tile_mask.hpp
@@ -0,0 +1,15 @@
+#pragma once
+
+#include <mbgl/tile/tile_id.hpp>
+
+#include <set>
+
+namespace mbgl {
+
+// A TileMask is a set of TileIDs that describe what part of a tile should be rendered. It omits
+// those parts of the tile that are covered by other/better tiles. If the entire tile should be
+// rendered, it contains the { 0, 0, 0 } tile. If it's empty, no part of the tile will be rendered.
+// TileMasks are typically generated with algorithm::updateTileMasks().
+using TileMask = std::set<CanonicalTileID>;
+
+} // namespace mbgl