New cpp folder structure

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

libs/drape_frontend/overlay_batcher.hpp

@@ -0,0 +1,51 @@
+#pragma once
+
+#include "drape_frontend/render_state_extension.hpp"
+#include "drape_frontend/tile_key.hpp"
+
+#include "drape/batcher.hpp"
+#include "drape/pointers.hpp"
+
+#include <vector>
+#include <utility>
+
+namespace dp
+{
+class TextureManager;
+class RenderBucket;
+}  // namespace dp
+
+namespace df
+{
+class MapShape;
+
+struct OverlayRenderData
+{
+  TileKey m_tileKey;
+  dp::RenderState m_state;
+  drape_ptr<dp::RenderBucket> m_bucket;
+
+  OverlayRenderData(TileKey const & key, dp::RenderState const & state,
+                    drape_ptr<dp::RenderBucket> && bucket)
+    : m_tileKey(key), m_state(state), m_bucket(std::move(bucket))
+  {}
+};
+
+using TOverlaysRenderData = std::vector<OverlayRenderData>;
+
+class OverlayBatcher
+{
+public:
+  explicit OverlayBatcher(TileKey const & key);
+  void Batch(ref_ptr<dp::GraphicsContext> context, drape_ptr<MapShape> const & shape,
+             ref_ptr<dp::TextureManager> texMng);
+  void Finish(ref_ptr<dp::GraphicsContext> context, TOverlaysRenderData & data);
+
+private:
+  void FlushGeometry(TileKey const & key, dp::RenderState const & state,
+                     drape_ptr<dp::RenderBucket> && bucket);
+
+  dp::Batcher m_batcher;
+  TOverlaysRenderData m_data;
+};
+}  // namespace df