2 files changed, 9 insertions, 1 deletions
diff --git a/include/mbgl/map/map.hpp b/include/mbgl/map/map.hpp
index f2e605141b..c190088088 100644
--- a/include/mbgl/map/map.hpp
+++ b/include/mbgl/map/map.hpp
@@ -45,7 +45,8 @@ class Map : private util::noncopyable {
 public:
     explicit Map(View&, FileSource&,
                  MapMode mapMode = MapMode::Continuous,
-                 GLContextMode contextMode = GLContextMode::Unique);
+                 GLContextMode contextMode = GLContextMode::Unique,
+                 ConstrainMode constrainMode = ConstrainMode::HeightOnly);
     ~Map();
 
     // Pauses the render thread. The render thread will stop running but will not be terminated and will not lose state until resumed.
diff --git a/include/mbgl/map/mode.hpp b/include/mbgl/map/mode.hpp
index 6ad9af5c74..8b65baf99f 100644
--- a/include/mbgl/map/mode.hpp
+++ b/include/mbgl/map/mode.hpp
@@ -19,6 +19,13 @@ enum class GLContextMode : uint8_t {
     Shared,
 };
 
+// We can choose to constrain the map both horizontally or vertically, or only
+// vertically e.g. while panning.
+enum class ConstrainMode : uint8_t {
+    HeightOnly,
+    WidthAndHeight,
+};
+
 } // namespace mbgl
 
 #endif // MBGL_MAP_MODE