New cpp folder structure

Signed-off-by: Alexander Borsuk <me@alex.bio>

libs/drape_frontend/drape_api.hpp

@@ -0,0 +1,73 @@
+#pragma once
+
+#include "drape_frontend/drape_engine_safe_ptr.hpp"
+
+#include "drape/color.hpp"
+#include "drape/pointers.hpp"
+
+#include "geometry/point2d.hpp"
+
+#include <mutex>
+#include <string>
+#include <unordered_map>
+#include <vector>
+
+namespace df
+{
+struct DrapeApiLineData
+{
+  DrapeApiLineData() = default;
+
+  DrapeApiLineData(std::vector<m2::PointD> const & points,
+                   dp::Color const & color)
+    : m_points(points)
+    , m_color(color)
+  {}
+
+  DrapeApiLineData & ShowPoints(bool markPoints)
+  {
+    m_showPoints = true;
+    m_markPoints = markPoints;
+    return *this;
+  }
+
+  DrapeApiLineData & Width(float width)
+  {
+    m_width = width;
+    return *this;
+  }
+
+  DrapeApiLineData & ShowId()
+  {
+    m_showId = true;
+    return *this;
+  }
+
+  std::vector<m2::PointD> m_points;
+  float m_width = 1.0f;
+  dp::Color m_color;
+
+  bool m_showPoints = false;
+  bool m_markPoints = false;
+  bool m_showId = false;
+};
+
+class DrapeApi
+{
+public:
+  using TLines = std::unordered_map<std::string, DrapeApiLineData>;
+
+  DrapeApi() = default;
+
+  void SetDrapeEngine(ref_ptr<DrapeEngine> engine);
+
+  void AddLine(std::string const & id, DrapeApiLineData const & data);
+  void RemoveLine(std::string const & id);
+  void Clear();
+  void Invalidate();
+
+private:
+  DrapeEngineSafePtr m_engine;
+  TLines m_lines;
+};
+}  // namespace df