implement functions for patterns

It introduces a new function type, FadedStopsFunction, that transitions
between the stops values instead of interpolating between them.

1 files changed, 2 insertions, 0 deletions

diff --git a/src/mbgl/style/style.hpp b/src/mbgl/style/style.hpp
index e9205712ef..434b394217 100644
--- a/src/mbgl/style/style.hpp
+++ b/src/mbgl/style/style.hpp
@@ -3,6 +3,7 @@
 
 #include <mbgl/style/property_transition.hpp>
 #include <mbgl/style/style_source.hpp>
+#include <mbgl/style/zoom_history.hpp>
 
 #include <mbgl/util/time.hpp>
 #include <mbgl/util/uv.hpp>
@@ -49,6 +50,7 @@ private:
     PropertyTransition defaultTransition;
     bool initial_render_complete = false;
     std::unique_ptr<uv::rwlock> mtx;
+    ZoomHistory zoomHistory;
 };
 
 }