1 files changed, 6 insertions, 2 deletions
diff --git a/src/mbgl/map/transform_state.hpp b/src/mbgl/map/transform_state.hpp
index b9acad66f1..970dda2613 100644
--- a/src/mbgl/map/transform_state.hpp
+++ b/src/mbgl/map/transform_state.hpp
@@ -18,7 +18,7 @@ class TransformState {
     friend class Transform;
 
 public:
-    TransformState(ConstrainMode = ConstrainMode::HeightOnly);
+    TransformState(ConstrainMode = ConstrainMode::HeightOnly, ViewportMode = ViewportMode::Default);
 
     // Matrix
     void matrixFor(mat4&, const UnwrappedTileID&) const;
@@ -31,10 +31,13 @@ public:
     // North Orientation
     NorthOrientation getNorthOrientation() const;
     double getNorthOrientationAngle() const;
-    
+
     // Constrain mode
     ConstrainMode getConstrainMode() const;
 
+    // Viewport mode
+    ViewportMode getViewportMode() const;
+
     // Position
     LatLng getLatLng(LatLng::WrapMode = LatLng::Unwrapped) const;
     double pixel_x() const;
@@ -99,6 +102,7 @@ private:
 
 private:
     ConstrainMode constrainMode;
+    ViewportMode viewportMode;
 
     // animation state
     bool rotating = false;