[core] Added Viewport mode

Satisfies embedding platforms that requires the viewport coordinate
systems to be set according to its standards e.g. viewport mirrored
vertically.

1 files changed, 6 insertions, 2 deletions

diff --git a/src/mbgl/map/transform.hpp b/src/mbgl/map/transform.hpp
index 7d3bdceb99..cd2d7a33f3 100644
--- a/src/mbgl/map/transform.hpp
+++ b/src/mbgl/map/transform.hpp
@@ -20,7 +20,7 @@ class View;
 
 class Transform : private util::noncopyable {
 public:
-    Transform(View&, ConstrainMode);
+    Transform(View&, ConstrainMode, ViewportMode);
 
     // Map view
     bool resize(std::array<uint16_t, 2> size);
@@ -132,11 +132,15 @@ public:
     // North Orientation
     void setNorthOrientation(NorthOrientation);
     NorthOrientation getNorthOrientation() const;
-    
+
     // Constrain mode
     void setConstrainMode(ConstrainMode);
     ConstrainMode getConstrainMode() const;
 
+    // Viewport mode
+    void setViewportMode(ViewportMode);
+    ViewportMode getViewportMode() const;
+
     // Transitions
     bool inTransition() const;
     Update updateTransitions(const TimePoint& now);