[core] Add RendererState::{pixelForLatLng,latLngForPixel}

1 files changed, 10 insertions, 4 deletions

diff --git a/include/mbgl/renderer/renderer_state.hpp b/include/mbgl/renderer/renderer_state.hpp
index 27985ae996..71011389ec 100644
--- a/include/mbgl/renderer/renderer_state.hpp
+++ b/include/mbgl/renderer/renderer_state.hpp
@@ -15,16 +15,22 @@ class RendererState {
 public:
 
     // Obtains a CameraOptions out of a given UpdateParameters object.
-    static CameraOptions getCameraOptions(UpdateParameters&, const EdgeInsets& = {});
+    static CameraOptions getCameraOptions(const UpdateParameters&, const EdgeInsets& = {});
 
     // Returns whether an image with the given ID exists from a given UpdateParamters object.
-    static bool hasImage(UpdateParameters&, const std::string& id);
+    static bool hasImage(const UpdateParameters&, const std::string& id);
 
     // Returns whether a layer with the given ID exists from a given UpdateParamters object.
-    static bool hasLayer(UpdateParameters&, const std::string& id);
+    static bool hasLayer(const UpdateParameters&, const std::string& id);
 
     // Returns whether a source with the given ID exists from a given UpdateParamters object.
-    static bool hasSource(UpdateParameters&, const std::string& id);
+    static bool hasSource(const UpdateParameters&, const std::string& id);
+
+    // Obtains the geographical coordinate out of a given screen coordinate.
+    static ScreenCoordinate pixelForLatLng(const UpdateParameters&, const LatLng&);
+
+    // Obtains the screen coordinate out of a given geographical coordinate.
+    static LatLng latLngForPixel(const UpdateParameters&, const ScreenCoordinate&);
 };
 
 } // namespace mbgl