Returning min and max route altitude and units.

2 files changed, 37 insertions, 4 deletions

diff --git a/map/framework.cpp b/map/framework.cpp
index 92f3bccb53..9f5e13fdad 100644
--- a/map/framework.cpp
+++ b/map/framework.cpp
@@ -2988,7 +2988,9 @@ bool Framework::OriginalFeatureHasDefaultName(FeatureID const & fid) const
 bool Framework::HasRouteAltitude() const { return m_routingSession.HasRouteAltitude(); }
 
 bool Framework::GenerateRouteAltitudeChart(uint32_t width, uint32_t height,
-                                           vector<uint8_t> & imageRGBAData) const
+                                           vector<uint8_t> & imageRGBAData,
+                                           int32_t & minRouteAltitude, int32_t & maxRouteAltitude,
+                                           measurement_utils::Units & altitudeUnits) const
 {
   feature::TAltitudes altitudes;
   vector<double> segDistance;
@@ -2997,6 +2999,29 @@ bool Framework::GenerateRouteAltitudeChart(uint32_t width, uint32_t height,
     return false;
   segDistance.insert(segDistance.begin(), 0.0);
 
-  return maps::GenerateChart(width, height, segDistance, altitudes,
-                             GetMapStyle(), imageRGBAData);
+  if (altitudes.empty())
+    return false;
+
+  if (!maps::GenerateChart(width, height, segDistance, altitudes, GetMapStyle(), imageRGBAData))
+    return false;
+
+  auto const minMaxIt = minmax_element(altitudes.cbegin(), altitudes.cend());
+  feature::TAltitude const minRouteAltitudeM = *minMaxIt.first;
+  feature::TAltitude const maxRouteAltitudeM = *minMaxIt.second;
+
+  altitudeUnits = measurement_utils::Units::Metric;
+  UNUSED_VALUE(settings::Get(settings::kMeasurementUnits, altitudeUnits));
+
+  switch (altitudeUnits)
+  {
+  case measurement_utils::Units::Imperial:
+    minRouteAltitude = measurement_utils::MetersToFeet(minRouteAltitudeM);
+    maxRouteAltitude = measurement_utils::MetersToFeet(maxRouteAltitudeM);
+    break;
+  case measurement_utils::Units::Metric:
+    minRouteAltitude = minRouteAltitudeM;
+    maxRouteAltitude = maxRouteAltitudeM;
+    break;
+  }
+  return true;
 }
diff --git a/map/framework.hpp b/map/framework.hpp
index 0b96e79f15..64511e7b6c 100644
--- a/map/framework.hpp
+++ b/map/framework.hpp
@@ -729,13 +729,21 @@ public:
   /// false otherwise.
   bool HasRouteAltitude() const;
   /// \brief Generates 4 bytes per point image (RGBA) and put the data to |imageRGBAData|.
+  /// \param width is width of chart shall be generated in pixels.
+  /// \param height is height of chart shall be generated in pixels.
+  /// \param imageRGBAData is bits of result image in RGBA.
+  /// \param minRouteAltitude is min altitude along the route in altitudeUnits.
+  /// \param maxRouteAltitude is max altitude along the route in altitudeUnits.
+  /// \param altitudeUnits is units (meters or feet) which is used to pass min and max altitudes.
   /// \returns If there is valid route info and the chart was generated returns true
   /// and false otherwise. If the method returns true it is guaranteed that the size of
   /// |imageRGBAData| is not zero.
   /// \note If HasRouteAltitude() method returns true, GenerateRouteAltitudeChart(...)
   /// could return false if route was deleted or rebuilt between the calls.
   bool GenerateRouteAltitudeChart(uint32_t width, uint32_t height,
-                                  vector<uint8_t> & imageRGBAData) const;
+                                  vector<uint8_t> & imageRGBAData,
+                                  int32_t & minRouteAltitude, int32_t & maxRouteAltitude,
+                                  measurement_utils::Units & altitudeUnits) const;
 
 public:
   /// @name Editor interface.