Removed usage of dynamic geometry from traffic renderer

14 files changed, 110 insertions, 377 deletions

diff --git a/drape_frontend/backend_renderer.cpp b/drape_frontend/backend_renderer.cpp
index 733d52c07d..b7e913031f 100644
--- a/drape_frontend/backend_renderer.cpp
+++ b/drape_frontend/backend_renderer.cpp
@@ -109,9 +109,11 @@ void BackendRenderer::AcceptMessage(ref_ptr<Message> message)
       TTilesCollection tiles = m_requestedTiles->GetTiles();
       if (!tiles.empty())
       {
-        ScreenBase const screen = m_requestedTiles->GetScreen();
-        bool const have3dBuildings = m_requestedTiles->Have3dBuildings();
-        m_readManager->UpdateCoverage(screen, have3dBuildings, tiles, m_texMng);
+        ScreenBase screen;
+        bool have3dBuildings;
+        bool needRegenerateTraffic;
+        m_requestedTiles->GetParams(screen, have3dBuildings, needRegenerateTraffic);
+        m_readManager->UpdateCoverage(screen, have3dBuildings, needRegenerateTraffic, tiles, m_texMng);
         m_updateCurrentCountryFn(screen.ClipRect().Center(), (*tiles.begin()).m_zoomLevel);
       }
       break;
@@ -355,17 +357,9 @@ void BackendRenderer::AcceptMessage(ref_ptr<Message> message)
   case Message::UpdateTraffic:
     {
       ref_ptr<UpdateTrafficMessage> msg = message;
-      bool const needInvalidate = m_trafficGenerator->UpdateColoring(msg->GetSegmentsColoring());
-      if (m_trafficGenerator->IsColorsCacheRefreshed())
-      {
-        auto texCoords = m_trafficGenerator->ProcessCacheRefreshing();
-        m_commutator->PostMessage(ThreadsCommutator::RenderThread,
-                                  make_unique_dp<SetTrafficTexCoordsMessage>(move(texCoords)),
-                                  MessagePriority::Normal);
-      }
+      m_trafficGenerator->UpdateColoring(msg->GetSegmentsColoring());
       m_commutator->PostMessage(ThreadsCommutator::RenderThread,
-                                make_unique_dp<UpdateTrafficMessage>(move(msg->GetSegmentsColoring()),
-                                                                     needInvalidate),
+                                make_unique_dp<RegenerateTrafficMessage>(),
                                 MessagePriority::Normal);
       break;
     }
diff --git a/drape_frontend/drape_engine.cpp b/drape_frontend/drape_engine.cpp
index 4ebfd44fff..f3aa10355a 100644
--- a/drape_frontend/drape_engine.cpp
+++ b/drape_frontend/drape_engine.cpp
@@ -557,7 +557,7 @@ void DrapeEngine::UpdateTraffic(traffic::TrafficInfo const & info)
   segmentsColoring.emplace(info.GetMwmId(), info.GetColoring());
 
   m_threadCommutator->PostMessage(ThreadsCommutator::ResourceUploadThread,
-                                  make_unique_dp<UpdateTrafficMessage>(move(segmentsColoring), false),
+                                  make_unique_dp<UpdateTrafficMessage>(move(segmentsColoring)),
                                   MessagePriority::Normal);
 }
 
diff --git a/drape_frontend/frontend_renderer.cpp b/drape_frontend/frontend_renderer.cpp
index b7f6799f98..1baae0a487 100755
--- a/drape_frontend/frontend_renderer.cpp
+++ b/drape_frontend/frontend_renderer.cpp
@@ -132,7 +132,7 @@ FrontendRenderer::FrontendRenderer(Params const & params)
   , m_requestedTiles(params.m_requestedTiles)
   , m_maxGeneration(0)
   , m_needRestoreSize(false)
-  , m_trafficStateChanged(false)
+  , m_needRegenerateTraffic(false)
   , m_trafficEnabled(params.m_trafficEnabled)
 {
 #ifdef DRAW_INFO
@@ -748,26 +748,15 @@ void FrontendRenderer::AcceptMessage(ref_ptr<Message> message)
       ref_ptr<EnableTrafficMessage> msg = message;
       m_trafficEnabled = msg->IsTrafficEnabled();
       if (msg->IsTrafficEnabled())
-        m_trafficStateChanged = true;
+        m_needRegenerateTraffic = true;
       else
         m_trafficRenderer->ClearGLDependentResources();
       break;
     }
 
-  case Message::UpdateTraffic:
+  case Message::RegenerateTraffic:
     {
-      ref_ptr<UpdateTrafficMessage> msg = message;
-      if (msg->NeedInvalidate())
-        InvalidateRect(m_userEventStream.GetCurrentScreen().ClipRect());
-      else
-        m_trafficRenderer->UpdateTraffic(msg->GetSegmentsColoring());
-      break;
-    }
-
-  case Message::SetTrafficTexCoords:
-    {
-      ref_ptr<SetTrafficTexCoordsMessage> msg = message;
-      m_trafficRenderer->SetTexCoords(move(msg->AcceptTexCoords()));
+      m_needRegenerateTraffic = true;
       break;
     }
 
@@ -852,7 +841,7 @@ void FrontendRenderer::UpdateGLResources()
   // Request new tiles.
   ScreenBase screen = m_userEventStream.GetCurrentScreen();
   m_lastReadedModelView = screen;
-  m_requestedTiles->Set(screen, m_isIsometry || screen.isPerspective(), ResolveTileKeys(screen));
+  m_requestedTiles->Set(screen, m_isIsometry || screen.isPerspective(), m_needRegenerateTraffic, ResolveTileKeys(screen));
   m_commutator->PostMessage(ThreadsCommutator::ResourceUploadThread,
                             make_unique_dp<UpdateReadManagerMessage>(),
                             MessagePriority::UberHighSingleton);
@@ -907,7 +896,8 @@ void FrontendRenderer::InvalidateRect(m2::RectD const & gRect)
 
     // Request new tiles.
     m_lastReadedModelView = screen;
-    m_requestedTiles->Set(screen, m_isIsometry || screen.isPerspective(), ResolveTileKeys(screen));
+    m_requestedTiles->Set(screen, m_isIsometry || screen.isPerspective(),
+                          m_needRegenerateTraffic, ResolveTileKeys(screen));
     m_commutator->PostMessage(ThreadsCommutator::ResourceUploadThread,
                               make_unique_dp<UpdateReadManagerMessage>(),
                               MessagePriority::UberHighSingleton);
@@ -1738,7 +1728,7 @@ void FrontendRenderer::Routine::Do()
     isActiveFrame |= m_renderer.m_texMng->UpdateDynamicTextures();
     m_renderer.RenderScene(modelView);
 
-    if (modelViewChanged || m_renderer.m_trafficStateChanged)
+    if (modelViewChanged || m_renderer.m_needRegenerateTraffic)
       m_renderer.UpdateScene(modelView);
 
     isActiveFrame |= InterpolationHolder::Instance().Advance(frameTime);
@@ -1887,15 +1877,16 @@ void FrontendRenderer::UpdateScene(ScreenBase const & modelView)
   for (RenderLayer & layer : m_layers)
     layer.m_isDirty |= RemoveGroups(removePredicate, layer.m_renderGroups, make_ref(m_overlayTree));
 
-  if (m_trafficStateChanged || m_lastReadedModelView != modelView)
+  if (m_needRegenerateTraffic || m_lastReadedModelView != modelView)
   {
-    m_trafficStateChanged = false;
     EmitModelViewChanged(modelView);
     m_lastReadedModelView = modelView;
-    m_requestedTiles->Set(modelView, m_isIsometry || modelView.isPerspective(), ResolveTileKeys(modelView));
+    m_requestedTiles->Set(modelView, m_isIsometry || modelView.isPerspective(), m_needRegenerateTraffic,
+                          ResolveTileKeys(modelView));
     m_commutator->PostMessage(ThreadsCommutator::ResourceUploadThread,
                               make_unique_dp<UpdateReadManagerMessage>(),
                               MessagePriority::UberHighSingleton);
+    m_needRegenerateTraffic = false;
   }
 }
 
diff --git a/drape_frontend/frontend_renderer.hpp b/drape_frontend/frontend_renderer.hpp
index 115bf24e09..f9e717c0c2 100755
--- a/drape_frontend/frontend_renderer.hpp
+++ b/drape_frontend/frontend_renderer.hpp
@@ -343,7 +343,7 @@ private:
 
   bool m_needRestoreSize;
 
-  bool m_trafficStateChanged;
+  bool m_needRegenerateTraffic;
   bool m_trafficEnabled;
 
 #ifdef DEBUG
diff --git a/drape_frontend/message.hpp b/drape_frontend/message.hpp
index 429bbda4d0..dfccdf43f7 100644
--- a/drape_frontend/message.hpp
+++ b/drape_frontend/message.hpp
@@ -67,7 +67,7 @@ public:
     SetVisibleViewport,
     EnableTraffic,
     FlushTrafficGeometry,
-    SetTrafficTexCoords,
+    RegenerateTraffic,
     UpdateTraffic,
     FlushTrafficData,
     ClearTrafficData,
diff --git a/drape_frontend/message_subclasses.hpp b/drape_frontend/message_subclasses.hpp
index 8a2d882ae9..3812094ee7 100644
--- a/drape_frontend/message_subclasses.hpp
+++ b/drape_frontend/message_subclasses.hpp
@@ -1032,39 +1032,26 @@ private:
   TrafficSegmentsGeometry m_segments;
 };
 
-class SetTrafficTexCoordsMessage : public Message
+class RegenerateTrafficMessage : public Message
 {
 public:
-  explicit SetTrafficTexCoordsMessage(TrafficTexCoords && texCoords)
-    : m_texCoords(move(texCoords))
-  {}
-
-  Type GetType() const override { return Message::SetTrafficTexCoords; }
-  bool IsGLContextDependent() const override { return true; }
-
-  TrafficTexCoords && AcceptTexCoords() { return move(m_texCoords); }
-
-private:
-  TrafficTexCoords m_texCoords;
+  Type GetType() const override { return Message::RegenerateTraffic; }
 };
 
 class UpdateTrafficMessage : public Message
 {
 public:
-  UpdateTrafficMessage(TrafficSegmentsColoring && segmentsColoring, bool needInvalidate)
+  explicit UpdateTrafficMessage(TrafficSegmentsColoring && segmentsColoring)
     : m_segmentsColoring(move(segmentsColoring))
-    , m_needInvalidate(needInvalidate)
   {}
 
   Type GetType() const override { return Message::UpdateTraffic; }
   bool IsGLContextDependent() const override { return true; }
 
   TrafficSegmentsColoring & GetSegmentsColoring() { return m_segmentsColoring; }
-  bool NeedInvalidate() const { return m_needInvalidate; }
 
 private:
   TrafficSegmentsColoring m_segmentsColoring;
-  bool const m_needInvalidate;
 };
 
 class FlushTrafficDataMessage : public Message
diff --git a/drape_frontend/read_manager.cpp b/drape_frontend/read_manager.cpp
index a8fcae7570..d2b21c499d 100755
--- a/drape_frontend/read_manager.cpp
+++ b/drape_frontend/read_manager.cpp
@@ -86,13 +86,13 @@ void ReadManager::OnTaskFinished(threads::IRoutine * task)
   myPool.Return(t);
 }
 
-void ReadManager::UpdateCoverage(ScreenBase const & screen, bool have3dBuildings,
+void ReadManager::UpdateCoverage(ScreenBase const & screen, bool have3dBuildings, bool needRegenerateTraffic,
                                  TTilesCollection const & tiles, ref_ptr<dp::TextureManager> texMng)
 {
   m_modeChanged |= (m_have3dBuildings != have3dBuildings);
   m_have3dBuildings = have3dBuildings;
 
-  if (m_modeChanged || MustDropAllTiles(screen))
+  if (m_modeChanged || needRegenerateTraffic || MustDropAllTiles(screen))
   {
     m_modeChanged = false;
 
diff --git a/drape_frontend/read_manager.hpp b/drape_frontend/read_manager.hpp
index b4ea123851..6d295dce2b 100755
--- a/drape_frontend/read_manager.hpp
+++ b/drape_frontend/read_manager.hpp
@@ -30,7 +30,7 @@ public:
   ReadManager(ref_ptr<ThreadsCommutator> commutator, MapDataProvider & model,
               bool allow3dBuildings, bool trafficEnabled);
 
-  void UpdateCoverage(ScreenBase const & screen, bool have3dBuildings,
+  void UpdateCoverage(ScreenBase const & screen, bool have3dBuildings, bool needRegenerateTraffic,
                       TTilesCollection const & tiles, ref_ptr<dp::TextureManager> texMng);
   void Invalidate(TTilesCollection const & keyStorage);
   void InvalidateAll();
diff --git a/drape_frontend/requested_tiles.cpp b/drape_frontend/requested_tiles.cpp
index 3387d17f29..64c6932862 100755
--- a/drape_frontend/requested_tiles.cpp
+++ b/drape_frontend/requested_tiles.cpp
@@ -3,12 +3,14 @@
 namespace df
 {
 
-void RequestedTiles::Set(ScreenBase const & screen, bool have3dBuildings, TTilesCollection && tiles)
+void RequestedTiles::Set(ScreenBase const & screen, bool have3dBuildings,
+                         bool needRegenerateTraffic, TTilesCollection && tiles)
 {
   lock_guard<mutex> lock(m_mutex);
   m_tiles = move(tiles);
   m_screen = screen;
   m_have3dBuildings = have3dBuildings;
+  m_needRegenerateTraffic = needRegenerateTraffic;
 }
 
 TTilesCollection RequestedTiles::GetTiles()
@@ -21,16 +23,13 @@ TTilesCollection RequestedTiles::GetTiles()
   return tiles;
 }
 
-ScreenBase RequestedTiles::GetScreen()
+void RequestedTiles::GetParams(ScreenBase & screen, bool & have3dBuildings,
+                               bool & needRegenerateTraffic)
 {
   lock_guard<mutex> lock(m_mutex);
-  return m_screen;
-}
-
-bool RequestedTiles::Have3dBuildings()
-{
-  lock_guard<mutex> lock(m_mutex);
-  return m_have3dBuildings;
+  screen = m_screen;
+  have3dBuildings = m_have3dBuildings;
+  needRegenerateTraffic = m_needRegenerateTraffic;
 }
 
 bool RequestedTiles::CheckTileKey(TileKey const & tileKey) const
diff --git a/drape_frontend/requested_tiles.hpp b/drape_frontend/requested_tiles.hpp
index 891c69c2f1..a5945bee8d 100755
--- a/drape_frontend/requested_tiles.hpp
+++ b/drape_frontend/requested_tiles.hpp
@@ -13,16 +13,18 @@ class RequestedTiles
 {
 public:
   RequestedTiles() = default;
-  void Set(ScreenBase const & screen, bool have3dBuildings, TTilesCollection && tiles);
+  void Set(ScreenBase const & screen, bool have3dBuildings,
+           bool needRegenerateTraffic, TTilesCollection && tiles);
   TTilesCollection GetTiles();
-  ScreenBase GetScreen();
-  bool Have3dBuildings();
+  void GetParams(ScreenBase & screen, bool & have3dBuildings,
+                 bool & needRegenerateTraffic);
   bool CheckTileKey(TileKey const & tileKey) const;
 
 private:
   TTilesCollection m_tiles;
   ScreenBase m_screen;
   bool m_have3dBuildings = false;
+  bool m_needRegenerateTraffic = false;
   mutable mutex m_mutex;
 };
 
diff --git a/drape_frontend/traffic_generator.cpp b/drape_frontend/traffic_generator.cpp
index 40794bdb5e..418687003d 100644
--- a/drape_frontend/traffic_generator.cpp
+++ b/drape_frontend/traffic_generator.cpp
@@ -24,16 +24,15 @@ namespace df
 namespace
 {
 
-uint32_t const kDynamicStreamID = 0x7F;
-
 dp::BindingInfo const & GetTrafficStaticBindingInfo()
 {
   static unique_ptr<dp::BindingInfo> s_info;
   if (s_info == nullptr)
   {
-    dp::BindingFiller<TrafficStaticVertex> filler(2);
+    dp::BindingFiller<TrafficStaticVertex> filler(3);
     filler.FillDecl<TrafficStaticVertex::TPosition>("a_position");
     filler.FillDecl<TrafficStaticVertex::TNormal>("a_normal");
+    filler.FillDecl<TrafficStaticVertex::TTexCoord>("a_colorTexCoord");
     s_info.reset(new dp::BindingInfo(filler.m_info));
   }
   return *s_info;
@@ -44,40 +43,24 @@ dp::BindingInfo const & GetTrafficLineStaticBindingInfo()
   static unique_ptr<dp::BindingInfo> s_info;
   if (s_info == nullptr)
   {
-    dp::BindingFiller<TrafficLineStaticVertex> filler(1);
+    dp::BindingFiller<TrafficLineStaticVertex> filler(2);
     filler.FillDecl<TrafficLineStaticVertex::TPosition>("a_position");
+    filler.FillDecl<TrafficLineStaticVertex::TTexCoord>("a_colorTexCoord");
     s_info.reset(new dp::BindingInfo(filler.m_info));
   }
   return *s_info;
 }
 
-dp::BindingInfo const & GetTrafficDynamicBindingInfo()
-{
-  static unique_ptr<dp::BindingInfo> s_info;
-  if (s_info == nullptr)
-  {
-    dp::BindingFiller<TrafficDynamicVertex> filler(1, kDynamicStreamID);
-    filler.FillDecl<TrafficDynamicVertex::TTexCoord>("a_colorTexCoord");
-    s_info.reset(new dp::BindingInfo(filler.m_info));
-  }
-  return *s_info;
-}
-
-void SubmitStaticVertex(glsl::vec3 const & pivot, glsl::vec2 const & normal, float side, float offsetFromStart,
+void SubmitStaticVertex(glsl::vec3 const & pivot, glsl::vec2 const & normal, float side,
+                        float offsetFromStart, glsl::vec2 const & texCoord,
                         vector<TrafficStaticVertex> & staticGeom)
 {
-  staticGeom.emplace_back(pivot, TrafficStaticVertex::TNormal(normal, side, offsetFromStart));
-}
-
-void SubmitDynamicVertex(glsl::vec2 const & texCoord, vector<TrafficDynamicVertex> & dynamicGeom)
-{
-  dynamicGeom.emplace_back(texCoord);
+  staticGeom.emplace_back(pivot, TrafficStaticVertex::TNormal(normal, side, offsetFromStart), texCoord);
 }
 
 void GenerateCapTriangles(glsl::vec3 const & pivot, vector<glsl::vec2> const & normals,
                           dp::TextureManager::ColorRegion const & colorRegion,
-                          vector<TrafficStaticVertex> & staticGeometry,
-                          vector<TrafficDynamicVertex> & dynamicGeometry)
+                          vector<TrafficStaticVertex> & staticGeometry)
 {
   float const kEps = 1e-5;
   glsl::vec2 const uv = glsl::ToVec2(colorRegion.GetTexRect().Center());
@@ -85,100 +68,16 @@ void GenerateCapTriangles(glsl::vec3 const & pivot, vector<glsl::vec2> const & n
   for (int j = 0; j < trianglesCount; j++)
   {
     SubmitStaticVertex(pivot, normals[3 * j],
-                       glsl::length(normals[3 * j]) < kEps ? 0.0f : 1.0f, 0.0f, staticGeometry);
+                       glsl::length(normals[3 * j]) < kEps ? 0.0f : 1.0f, 0.0f, uv, staticGeometry);
     SubmitStaticVertex(pivot, normals[3 * j + 1],
-                       glsl::length(normals[3 * j + 1]) < kEps ? 0.0f : 1.0f, 0.0f, staticGeometry);
+                       glsl::length(normals[3 * j + 1]) < kEps ? 0.0f : 1.0f, 0.0f, uv, staticGeometry);
     SubmitStaticVertex(pivot, normals[3 * j + 2],
-                       glsl::length(normals[3 * j + 2]) < kEps ? 0.0f : 1.0f, 0.0f, staticGeometry);
-
-    for (int k = 0; k < 3; k++)
-      SubmitDynamicVertex(uv, dynamicGeometry);
+                       glsl::length(normals[3 * j + 2]) < kEps ? 0.0f : 1.0f, 0.0f, uv, staticGeometry);
   }
 }
 
 } // namespace
 
-TrafficHandle::TrafficHandle(traffic::TrafficInfo::RoadSegmentId const & segmentId, RoadClass const & roadClass,
-                             m2::RectD const & boundingBox, glsl::vec2 const & texCoord, size_t verticesCount)
-  : OverlayHandle(FeatureID(), dp::Anchor::Center, 0, false)
-  , m_segmentId(segmentId)
-  , m_roadClass(roadClass)
-  , m_boundingBox(boundingBox)
-  , m_needUpdate(false)
-{
-  ASSERT_NOT_EQUAL(verticesCount, 0, ());
-  m_buffer.resize(verticesCount);
-  for (size_t i = 0; i < m_buffer.size(); i++)
-    m_buffer[i] = texCoord;
-}
-
-void TrafficHandle::GetAttributeMutation(ref_ptr<dp::AttributeBufferMutator> mutator) const
-{
-  if (!m_needUpdate)
-    return;
-
-  TOffsetNode const & node = GetOffsetNode(kDynamicStreamID);
-  ASSERT(node.first.GetElementSize() == sizeof(TrafficDynamicVertex), ());
-  ASSERT(node.second.m_count == m_buffer.size(), ());
-
-  uint32_t const byteCount = m_buffer.size() * sizeof(TrafficDynamicVertex);
-  void * buffer = mutator->AllocateMutationBuffer(byteCount);
-  memcpy(buffer, m_buffer.data(), byteCount);
-
-  dp::MutateNode mutateNode;
-  mutateNode.m_region = node.second;
-  mutateNode.m_data = make_ref(buffer);
-  mutator->AddMutation(node.first, mutateNode);
-
-  m_needUpdate = false;
-}
-
-bool TrafficHandle::Update(ScreenBase const & screen)
-{
-  UNUSED_VALUE(screen);
-  return true;
-}
-
-bool TrafficHandle::IndexesRequired() const
-{
-  return false;
-}
-
-m2::RectD TrafficHandle::GetPixelRect(ScreenBase const & screen, bool perspective) const
-{
-  UNUSED_VALUE(screen);
-  UNUSED_VALUE(perspective);
-  return m2::RectD();
-}
-
-void TrafficHandle::GetPixelShape(ScreenBase const & screen, bool perspective, Rects & rects) const
-{
-  UNUSED_VALUE(screen);
-  UNUSED_VALUE(perspective);
-}
-
-void TrafficHandle::SetTexCoord(glsl::vec2 const & texCoord)
-{
-  for (size_t i = 0; i < m_buffer.size(); i++)
-    m_buffer[i] = texCoord;
-  m_needUpdate = true;
-}
-
-traffic::TrafficInfo::RoadSegmentId const & TrafficHandle::GetSegmentId() const
-{
-  return m_segmentId;
-}
-
-RoadClass const & TrafficHandle::GetRoadClass() const
-{
-  return m_roadClass;
-}
-
-m2::RectD const & TrafficHandle::GetBoundingBox() const
-{
-  return m_boundingBox;
-}
-
 void TrafficGenerator::Init()
 {
   int constexpr kBatchersCount = 3;
@@ -188,10 +87,7 @@ void TrafficGenerator::Init()
                                   kBatchSize, kBatchSize);
 
   m_providerLines.InitStream(0 /* stream index */, GetTrafficLineStaticBindingInfo(), nullptr);
-  m_providerLines.InitStream(1 /* stream index */, GetTrafficDynamicBindingInfo(), nullptr);
-
   m_providerTriangles.InitStream(0 /* stream index */, GetTrafficStaticBindingInfo(), nullptr);
-  m_providerTriangles.InitStream(1 /* stream index */, GetTrafficDynamicBindingInfo(), nullptr);
 }
 
 void TrafficGenerator::ClearGLDependentResources()
@@ -245,48 +141,33 @@ void TrafficGenerator::FlushSegmentsGeometry(TileKey const & tileKey, TrafficSeg
 
           ASSERT(m_colorsCacheValid, ());
           dp::TextureManager::ColorRegion const & colorRegion = m_colorsCache[static_cast<size_t>(segmentColoringIt->second)];
-          glsl::vec2 const uv = glsl::ToVec2(colorRegion.GetTexRect().Center());
 
           int width = 0;
           if (TrafficRenderer::CanBeRendereredAsLine(g.m_roadClass, tileKey.m_zoomLevel, width))
           {
             vector<TrafficLineStaticVertex> staticGeometry;
-            vector<TrafficDynamicVertex> dynamicGeometry;
-            GenerateLineSegment(colorRegion, g.m_polyline, tileKey.GetGlobalRect().Center(), depth,
-                                staticGeometry, dynamicGeometry);
-            ASSERT_EQUAL(staticGeometry.size(), dynamicGeometry.size(), ());
-
-            if ((staticGeometry.size() + dynamicGeometry.size()) == 0)
+            GenerateLineSegment(colorRegion, g.m_polyline, tileKey.GetGlobalRect().Center(), depth, staticGeometry);
+            if (staticGeometry.empty())
               continue;
 
-            drape_ptr<dp::OverlayHandle> handle = make_unique_dp<TrafficHandle>(sid, g.m_roadClass, g.m_polyline.GetLimitRect(), uv,
-                                                                                staticGeometry.size());
             m_providerLines.Reset(staticGeometry.size());
             m_providerLines.UpdateStream(0 /* stream index */, make_ref(staticGeometry.data()));
-            m_providerLines.UpdateStream(1 /* stream index */, make_ref(dynamicGeometry.data()));
 
             dp::GLState curLineState = lineState;
             curLineState.SetLineWidth(width);
-            batcher->InsertLineStrip(curLineState, make_ref(&m_providerLines), move(handle));
+            batcher->InsertLineStrip(curLineState, make_ref(&m_providerLines));
           }
           else
           {
             vector<TrafficStaticVertex> staticGeometry;
-            vector<TrafficDynamicVertex> dynamicGeometry;
             bool const generateCaps = (tileKey.m_zoomLevel > kGenerateCapsZoomLevel[static_cast<uint32_t>(g.m_roadClass)]);
-            GenerateSegment(colorRegion, g.m_polyline, tileKey.GetGlobalRect().Center(), generateCaps, depth,
-                            staticGeometry, dynamicGeometry);
-            ASSERT_EQUAL(staticGeometry.size(), dynamicGeometry.size(), ());
-
-            if ((staticGeometry.size() + dynamicGeometry.size()) == 0)
+            GenerateSegment(colorRegion, g.m_polyline, tileKey.GetGlobalRect().Center(), generateCaps, depth, staticGeometry);
+            if (staticGeometry.empty())
               continue;
 
-            drape_ptr<dp::OverlayHandle> handle = make_unique_dp<TrafficHandle>(sid, g.m_roadClass, g.m_polyline.GetLimitRect(), uv,
-                                                                                staticGeometry.size());
             m_providerTriangles.Reset(staticGeometry.size());
             m_providerTriangles.UpdateStream(0 /* stream index */, make_ref(staticGeometry.data()));
-            m_providerTriangles.UpdateStream(1 /* stream index */, make_ref(dynamicGeometry.data()));
-            batcher->InsertTriangleList(state, make_ref(&m_providerTriangles), move(handle));
+            batcher->InsertTriangleList(state, make_ref(&m_providerTriangles));
           }
         }
       }
@@ -299,16 +180,10 @@ void TrafficGenerator::FlushSegmentsGeometry(TileKey const & tileKey, TrafficSeg
   GLFunctions::glFlush();
 }
 
-bool TrafficGenerator::UpdateColoring(TrafficSegmentsColoring const & coloring)
+void TrafficGenerator::UpdateColoring(TrafficSegmentsColoring const & coloring)
 {
-  bool hasNew = false;
-  for (auto it = coloring.begin(); it != coloring.end(); ++it)
-  {
-    if (!hasNew && m_coloring.find(it->first) == m_coloring.end())
-      hasNew = true;
-    m_coloring[it->first] = it->second;
-  }
-  return hasNew;
+  for (auto const & p : coloring)
+    m_coloring[p.first] = p.second;
 }
 
 void TrafficGenerator::ClearCache()
@@ -334,21 +209,20 @@ void TrafficGenerator::FlushGeometry(TrafficBatcherKey const & key, dp::GLState
   renderData.m_bucket = move(buffer);
   renderData.m_mwmId = key.m_mwmId;
   renderData.m_tileKey = key.m_tileKey;
+  renderData.m_roadClass = key.m_roadClass;
   m_flushRenderDataFn(move(renderData));
 }
 
 void TrafficGenerator::GenerateSegment(dp::TextureManager::ColorRegion const & colorRegion,
                                        m2::PolylineD const & polyline, m2::PointD const & tileCenter,
-                                       bool generateCaps, float depth, vector<TrafficStaticVertex> & staticGeometry,
-                                       vector<TrafficDynamicVertex> & dynamicGeometry)
+                                       bool generateCaps, float depth, vector<TrafficStaticVertex> & staticGeometry)
 {
   vector<m2::PointD> const & path = polyline.GetPoints();
   ASSERT_GREATER(path.size(), 1, ());
 
   size_t const kAverageSize = path.size() * 4;
-  size_t const kAverageCapSize = 24;
+  size_t const kAverageCapSize = 12;
   staticGeometry.reserve(staticGeometry.size() + kAverageSize + kAverageCapSize * 2);
-  dynamicGeometry.reserve(dynamicGeometry.size() + kAverageSize + kAverageCapSize * 2);
 
   // Build geometry.
   glsl::vec2 firstPoint, firstTangent, firstLeftNormal, firstRightNormal;
@@ -383,14 +257,12 @@ void TrafficGenerator::GenerateSegment(dp::TextureManager::ColorRegion const & c
 
     glsl::vec3 const startPivot = glsl::vec3(p1, depth);
     glsl::vec3 const endPivot = glsl::vec3(p2, depth);
-    SubmitStaticVertex(startPivot, rightNormal, -1.0f, 0.0f, staticGeometry);
-    SubmitStaticVertex(startPivot, leftNormal, 1.0f, 0.0f, staticGeometry);
-    SubmitStaticVertex(endPivot, rightNormal, -1.0f, maskSize, staticGeometry);
-    SubmitStaticVertex(endPivot, rightNormal, -1.0f, maskSize, staticGeometry);
-    SubmitStaticVertex(startPivot, leftNormal, 1.0f, 0.0f, staticGeometry);
-    SubmitStaticVertex(endPivot, leftNormal, 1.0f, maskSize, staticGeometry);
-    for (int j = 0; j < 6; j++)
-      SubmitDynamicVertex(uv, dynamicGeometry);
+    SubmitStaticVertex(startPivot, rightNormal, -1.0f, 0.0f, uv, staticGeometry);
+    SubmitStaticVertex(startPivot, leftNormal, 1.0f, 0.0f, uv, staticGeometry);
+    SubmitStaticVertex(endPivot, rightNormal, -1.0f, maskSize, uv, staticGeometry);
+    SubmitStaticVertex(endPivot, rightNormal, -1.0f, maskSize, uv, staticGeometry);
+    SubmitStaticVertex(startPivot, leftNormal, 1.0f, 0.0f, uv, staticGeometry);
+    SubmitStaticVertex(endPivot, leftNormal, 1.0f, maskSize, uv, staticGeometry);
   }
 
   // Generate caps.
@@ -401,36 +273,31 @@ void TrafficGenerator::GenerateSegment(dp::TextureManager::ColorRegion const & c
     normals.reserve(kAverageCapSize);
     GenerateCapNormals(dp::RoundCap, firstLeftNormal, firstRightNormal, -firstTangent,
                        1.0f, true /* isStart */, normals, kSegmentsCount);
-    GenerateCapTriangles(glsl::vec3(firstPoint, depth), normals, colorRegion,
-                         staticGeometry, dynamicGeometry);
+    GenerateCapTriangles(glsl::vec3(firstPoint, depth), normals, colorRegion, staticGeometry);
 
     normals.clear();
     GenerateCapNormals(dp::RoundCap, lastLeftNormal, lastRightNormal, lastTangent,
                        1.0f, false /* isStart */, normals, kSegmentsCount);
-    GenerateCapTriangles(glsl::vec3(lastPoint, depth), normals, colorRegion,
-                         staticGeometry, dynamicGeometry);
+    GenerateCapTriangles(glsl::vec3(lastPoint, depth), normals, colorRegion, staticGeometry);
   }
 }
 
 void TrafficGenerator::GenerateLineSegment(dp::TextureManager::ColorRegion const & colorRegion,
                                            m2::PolylineD const & polyline, m2::PointD const & tileCenter,
-                                           float depth, vector<TrafficLineStaticVertex> & staticGeometry,
-                                           vector<TrafficDynamicVertex> & dynamicGeometry)
+                                           float depth, vector<TrafficLineStaticVertex> & staticGeometry)
 {
   vector<m2::PointD> const & path = polyline.GetPoints();
   ASSERT_GREATER(path.size(), 1, ());
 
   size_t const kAverageSize = path.size();
   staticGeometry.reserve(staticGeometry.size() + kAverageSize);
-  dynamicGeometry.reserve(dynamicGeometry.size() + kAverageSize);
 
   // Build geometry.
   glsl::vec2 const uv = glsl::ToVec2(colorRegion.GetTexRect().Center());
   for (size_t i = 0; i < path.size(); ++i)
   {
     glsl::vec2 const p = glsl::ToVec2(MapShape::ConvertToLocal(path[i], tileCenter, kShapeCoordScalar));
-    staticGeometry.emplace_back(glsl::vec3(p, depth));
-    SubmitDynamicVertex(uv, dynamicGeometry);
+    staticGeometry.emplace_back(glsl::vec3(p, depth), uv);
   }
 }
 
@@ -469,18 +336,7 @@ void TrafficGenerator::FillColorsCache(ref_ptr<dp::TextureManager> textures)
       m_colorsCache[i] = colorRegion;
     }
     m_colorsCacheValid = true;
-    m_colorsCacheRefreshed = true;
   }
 }
 
-TrafficTexCoords TrafficGenerator::ProcessCacheRefreshing()
-{
-  TrafficTexCoords result;
-  for (size_t i = 0; i < m_colorsCache.size(); i++)
-    result[i] = glsl::ToVec2(m_colorsCache[i].GetTexRect().Center());
-  m_colorsCacheRefreshed = false;
-  return result;
-}
-
 } // namespace df
-
diff --git a/drape_frontend/traffic_generator.hpp b/drape_frontend/traffic_generator.hpp
index ceacb32c19..0abbc1e34b 100644
--- a/drape_frontend/traffic_generator.hpp
+++ b/drape_frontend/traffic_generator.hpp
@@ -7,7 +7,6 @@
 #include "drape/color.hpp"
 #include "drape/glsl_types.hpp"
 #include "drape/glstate.hpp"
-#include "drape/overlay_handle.hpp"
 #include "drape/render_bucket.hpp"
 #include "drape/texture_manager.hpp"
 
@@ -79,16 +78,13 @@ using TrafficSegmentsGeometry = map<MwmSet::MwmId, vector<pair<traffic::TrafficI
                                                                TrafficSegmentGeometry>>>;
 using TrafficSegmentsColoring = map<MwmSet::MwmId, traffic::TrafficInfo::Coloring>;
 
-class TrafficHandle;
-
 struct TrafficRenderData
 {
   dp::GLState m_state;
   drape_ptr<dp::RenderBucket> m_bucket;
   TileKey m_tileKey;
   MwmSet::MwmId m_mwmId;
-  m2::RectD m_boundingBox;
-  vector<TrafficHandle *> m_handles;
+  RoadClass m_roadClass;
 
   TrafficRenderData(dp::GLState const & state) : m_state(state) {}
 };
@@ -97,69 +93,36 @@ struct TrafficStaticVertex
 {
   using TPosition = glsl::vec3;
   using TNormal = glsl::vec4;
+  using TTexCoord = glsl::vec2;
 
   TrafficStaticVertex() = default;
-  TrafficStaticVertex(TPosition const & position, TNormal const & normal)
+  TrafficStaticVertex(TPosition const & position, TNormal const & normal,
+                      TTexCoord const & colorTexCoord)
     : m_position(position)
     , m_normal(normal)
+    , m_colorTexCoord(colorTexCoord)
   {}
 
   TPosition m_position;
   TNormal m_normal;
+  TTexCoord m_colorTexCoord;
 };
 
 struct TrafficLineStaticVertex
 {
   using TPosition = glsl::vec3;
+  using TTexCoord = glsl::vec2;
 
   TrafficLineStaticVertex() = default;
-  TrafficLineStaticVertex(TPosition const & position)
+  TrafficLineStaticVertex(TPosition const & position, TTexCoord const & colorTexCoord)
     : m_position(position)
+    , m_colorTexCoord(colorTexCoord)
   {}
 
   TPosition m_position;
-};
-
-struct TrafficDynamicVertex
-{
-  using TTexCoord = glsl::vec2;
-
-  TrafficDynamicVertex() = default;
-  TrafficDynamicVertex(TTexCoord const & color)
-    : m_colorTexCoord(color)
-  {}
-
   TTexCoord m_colorTexCoord;
 };
 
-class TrafficHandle : public dp::OverlayHandle
-{
-  using TBase = dp::OverlayHandle;
-
-public:
-  TrafficHandle(traffic::TrafficInfo::RoadSegmentId const & segmentId, RoadClass const & roadClass,
-                m2::RectD const & boundingBox, glsl::vec2 const & texCoord,
-                size_t verticesCount);
-
-  void GetAttributeMutation(ref_ptr<dp::AttributeBufferMutator> mutator) const override;
-  bool Update(ScreenBase const & screen) override;
-  bool IndexesRequired() const override;
-  m2::RectD GetPixelRect(ScreenBase const & screen, bool perspective) const override;
-  void GetPixelShape(ScreenBase const & screen, bool perspective, Rects & rects) const override;
-
-  void SetTexCoord(glsl::vec2 const & texCoord);
-  traffic::TrafficInfo::RoadSegmentId const & GetSegmentId() const;
-  RoadClass const & GetRoadClass() const;
-  m2::RectD const & GetBoundingBox() const;
-
-private:
-  traffic::TrafficInfo::RoadSegmentId m_segmentId;
-  RoadClass m_roadClass;
-  vector<glsl::vec2> m_buffer;
-  m2::RectD m_boundingBox;
-  mutable bool m_needUpdate;
-};
-
 using TrafficTexCoords = unordered_map<size_t, glsl::vec2>;
 
 class TrafficGenerator final
@@ -169,8 +132,8 @@ public:
 
   explicit TrafficGenerator(TFlushRenderDataFn flushFn)
     : m_flushRenderDataFn(flushFn)
-    , m_providerTriangles(2 /* stream count */, 0 /* vertices count*/)
-    , m_providerLines(2 /* stream count */, 0 /* vertices count*/)
+    , m_providerTriangles(1 /* stream count */, 0 /* vertices count*/)
+    , m_providerLines(1 /* stream count */, 0 /* vertices count*/)
   {}
 
   void Init();
@@ -178,15 +141,12 @@ public:
 
   void FlushSegmentsGeometry(TileKey const & tileKey, TrafficSegmentsGeometry const & geom,
                              ref_ptr<dp::TextureManager> textures);
-  bool UpdateColoring(TrafficSegmentsColoring const & coloring);
+  void UpdateColoring(TrafficSegmentsColoring const & coloring);
 
   void ClearCache();
   void ClearCache(MwmSet::MwmId const & mwmId);
   void InvalidateTexturesCache();
 
-  bool IsColorsCacheRefreshed() const { return m_colorsCacheRefreshed; }
-  TrafficTexCoords ProcessCacheRefreshing();
-
   static df::ColorConstant GetColorBySpeedGroup(traffic::SpeedGroup const & speedGroup);
 
 private:
@@ -220,12 +180,10 @@ private:
 
   void GenerateSegment(dp::TextureManager::ColorRegion const & colorRegion,
                        m2::PolylineD const & polyline, m2::PointD const & tileCenter,
-                       bool generateCaps, float depth, vector<TrafficStaticVertex> & staticGeometry,
-                       vector<TrafficDynamicVertex> & dynamicGeometry);
+                       bool generateCaps, float depth, vector<TrafficStaticVertex> & staticGeometry);
   void GenerateLineSegment(dp::TextureManager::ColorRegion const & colorRegion,
                            m2::PolylineD const & polyline, m2::PointD const & tileCenter, float depth,
-                           vector<TrafficLineStaticVertex> & staticGeometry,
-                           vector<TrafficDynamicVertex> & dynamicGeometry);
+                           vector<TrafficLineStaticVertex> & staticGeometry);
   void FillColorsCache(ref_ptr<dp::TextureManager> textures);
 
   void FlushGeometry(TrafficBatcherKey const & key, dp::GLState const & state,
@@ -235,7 +193,6 @@ private:
 
   array<dp::TextureManager::ColorRegion, static_cast<size_t>(traffic::SpeedGroup::Count)> m_colorsCache;
   bool m_colorsCacheValid = false;
-  bool m_colorsCacheRefreshed = false;
 
   drape_ptr<BatchersPool<TrafficBatcherKey, TrafficBatcherKeyComparator>> m_batchersPool;
   TFlushRenderDataFn m_flushRenderDataFn;
diff --git a/drape_frontend/traffic_renderer.cpp b/drape_frontend/traffic_renderer.cpp
index 853148892a..6e781f72d6 100644
--- a/drape_frontend/traffic_renderer.cpp
+++ b/drape_frontend/traffic_renderer.cpp
@@ -111,14 +111,6 @@ void TrafficRenderer::AddRenderData(ref_ptr<dp::GpuProgramManager> mng, TrafficR
   ref_ptr<dp::GpuProgram> program = mng->GetProgram(rd.m_state.GetProgramIndex());
   program->Bind();
   rd.m_bucket->GetBuffer()->Build(program);
-
-  rd.m_handles.reserve(rd.m_bucket->GetOverlayHandlesCount());
-  for (size_t j = 0; j < rd.m_bucket->GetOverlayHandlesCount(); j++)
-  {
-    TrafficHandle * handle = static_cast<TrafficHandle *>(rd.m_bucket->GetOverlayHandle(j).get());
-    rd.m_handles.emplace_back(handle);
-    rd.m_boundingBox.Add(handle->GetBoundingBox());
-  }
 }
 
 void TrafficRenderer::OnUpdateViewport(CoverageResult const & coverage, int currentZoomLevel,
@@ -143,28 +135,6 @@ void TrafficRenderer::OnGeometryReady(int currentZoomLevel)
   }), m_renderData.end());
 }
 
-void TrafficRenderer::UpdateTraffic(TrafficSegmentsColoring const & trafficColoring)
-{
-  for (TrafficRenderData & renderData : m_renderData)
-  {
-    auto coloringIt = trafficColoring.find(renderData.m_mwmId);
-    if (coloringIt == trafficColoring.end())
-      continue;
-
-    for (size_t i = 0; i < renderData.m_handles.size(); i++)
-    {
-      auto it = coloringIt->second.find(renderData.m_handles[i]->GetSegmentId());
-      if (it != coloringIt->second.end())
-      {
-        auto texCoordIt = m_texCoords.find(static_cast<size_t>(it->second));
-        if (texCoordIt == m_texCoords.end())
-          continue;
-        renderData.m_handles[i]->SetTexCoord(texCoordIt->second);
-      }
-    }
-  }
-}
-
 void TrafficRenderer::RenderTraffic(ScreenBase const & screen, int zoomLevel, float opacity,
                                     ref_ptr<dp::GpuProgramManager> mng,
                                     dp::UniformValuesStorage const & commonUniforms)
@@ -172,8 +142,6 @@ void TrafficRenderer::RenderTraffic(ScreenBase const & screen, int zoomLevel, fl
   if (m_renderData.empty() || zoomLevel < kRoadClass0ZoomLevel)
     return;
 
-  m2::RectD const clipRect = screen.ClipRect();
-
   auto const style = GetStyleReader().GetCurrentStyle();
   dp::Color const lightArrowColor = df::GetColorConstant(style, df::TrafficArrowLight);
   dp::Color const darkArrowColor = df::GetColorConstant(style, df::TrafficArrowDark);
@@ -182,9 +150,6 @@ void TrafficRenderer::RenderTraffic(ScreenBase const & screen, int zoomLevel, fl
   GLFunctions::glClearDepth();
   for (TrafficRenderData & renderData : m_renderData)
   {
-    if (!clipRect.IsIntersect(renderData.m_boundingBox))
-      continue;
-
     if (renderData.m_state.GetDrawAsLine())
     {
       ref_ptr<dp::GpuProgram> program = mng->GetProgram(renderData.m_state.GetProgramIndex());
@@ -208,37 +173,30 @@ void TrafficRenderer::RenderTraffic(ScreenBase const & screen, int zoomLevel, fl
       int minVisibleArrowZoomLevel = kMinVisibleArrowZoomLevel;
       float outline = 0.0f;
 
-      if (renderData.m_bucket->GetOverlayHandlesCount() > 0)
+      int visibleZoomLevel = kRoadClass0ZoomLevel;
+      if (renderData.m_roadClass == RoadClass::Class0)
+      {
+        outline = (zoomLevel <= kOutlineMinZoomLevel ? 1.0 : 0.0);
+      }
+      else if (renderData.m_roadClass == RoadClass::Class1)
       {
-        TrafficHandle * handle = static_cast<TrafficHandle *>(renderData.m_bucket->GetOverlayHandle(0).get());
-        ASSERT(handle != nullptr, ());
-
-        int visibleZoomLevel = kRoadClass0ZoomLevel;
-        if (handle->GetRoadClass() == RoadClass::Class0)
-        {
-          outline = (zoomLevel <= kOutlineMinZoomLevel ? 1.0 : 0.0);
-        }
-        else if (handle->GetRoadClass() == RoadClass::Class1)
-        {
-          outline = (zoomLevel <= kOutlineMinZoomLevel ? 1.0 : 0.0);
-          visibleZoomLevel = kRoadClass1ZoomLevel;
-        }
-        else if (handle->GetRoadClass() == RoadClass::Class2)
-        {
-          visibleZoomLevel = kRoadClass2ZoomLevel;
-          minVisibleArrowZoomLevel = kRoadClass2MinVisibleArrowZoomLevel;
-        }
-
-        if (zoomLevel < visibleZoomLevel)
-          continue;
-
-        leftPixelHalfWidth = CalculateHalfWidth(screen, handle->GetRoadClass(), true /* left */);
-        invLeftPixelLength = 1.0f / (2.0f * leftPixelHalfWidth * kTrafficArrowAspect);
-        rightPixelHalfWidth = CalculateHalfWidth(screen, handle->GetRoadClass(), false /* left */);
-        float const kEps = 1e-5;
-        if (fabs(leftPixelHalfWidth) < kEps && fabs(rightPixelHalfWidth) < kEps)
-          continue;
+        outline = (zoomLevel <= kOutlineMinZoomLevel ? 1.0 : 0.0);
+        visibleZoomLevel = kRoadClass1ZoomLevel;
       }
+      else if (renderData.m_roadClass == RoadClass::Class2)
+      {
+        visibleZoomLevel = kRoadClass2ZoomLevel;
+        minVisibleArrowZoomLevel = kRoadClass2MinVisibleArrowZoomLevel;
+      }
+      if (zoomLevel < visibleZoomLevel)
+        continue;
+
+      leftPixelHalfWidth = CalculateHalfWidth(screen, renderData.m_roadClass, true /* left */);
+      invLeftPixelLength = 1.0f / (2.0f * leftPixelHalfWidth * kTrafficArrowAspect);
+      rightPixelHalfWidth = CalculateHalfWidth(screen, renderData.m_roadClass, false /* left */);
+      float const kEps = 1e-5;
+      if (fabs(leftPixelHalfWidth) < kEps && fabs(rightPixelHalfWidth) < kEps)
+        continue;
 
       ref_ptr<dp::GpuProgram> program = mng->GetProgram(renderData.m_state.GetProgramIndex());
       program->Bind();
@@ -264,15 +222,9 @@ void TrafficRenderer::RenderTraffic(ScreenBase const & screen, int zoomLevel, fl
   }
 }
 
-void TrafficRenderer::SetTexCoords(TrafficTexCoords && texCoords)
-{
-  m_texCoords = move(texCoords);
-}
-
 void TrafficRenderer::ClearGLDependentResources()
 {
   m_renderData.clear();
-  m_texCoords.clear();
 }
 
 void TrafficRenderer::Clear(MwmSet::MwmId const & mwmId)
diff --git a/drape_frontend/traffic_renderer.hpp b/drape_frontend/traffic_renderer.hpp
index b1bdc2f86e..b6cf3c78ad 100644
--- a/drape_frontend/traffic_renderer.hpp
+++ b/drape_frontend/traffic_renderer.hpp
@@ -23,10 +23,6 @@ public:
   void AddRenderData(ref_ptr<dp::GpuProgramManager> mng,
                      TrafficRenderData && renderData);
 
-  void SetTexCoords(TrafficTexCoords && texCoords);
-
-  void UpdateTraffic(TrafficSegmentsColoring const & trafficColoring);
-
   void RenderTraffic(ScreenBase const & screen, int zoomLevel, float opacity,
                      ref_ptr<dp::GpuProgramManager> mng,
                      dp::UniformValuesStorage const & commonUniforms);
@@ -47,7 +43,6 @@ private:
   static float GetPixelWidthInternal(RoadClass const & roadClass, int zoomLevel);
 
   vector<TrafficRenderData> m_renderData;
-  TrafficTexCoords m_texCoords;
 };
 
 } // namespace df