Method UpdateScene

libs/drape_frontend/frontend_renderer.cpp:2542–2574

}

void FrontendRenderer::UpdateScene(ScreenBase const & modelView)
{
  TRACE_SECTION("[drape] UpdateScene");
  ResolveZoomLevel(modelView);

  m_gpsTrackRenderer->Update();

  auto removePredicate = [this](drape_ptr<RenderGroup> const & group)
  {
    uint32_t constexpr kMaxGenerationRange = 5;
    TileKey const & key = group->GetTileKey();

    return ((GetDepthLayer(group->GetState()) == DepthLayer::OverlayLayer ||
             GetDepthLayer(group->GetState()) == DepthLayer::OverlayUnderBuildingLayer) &&
            key.m_zoomLevel > GetCurrentZoom()) ||
           (m_maxGeneration - key.m_generation > kMaxGenerationRange) ||
           (group->IsUserMark() && (m_maxUserMarksGeneration - key.m_userMarksGeneration > kMaxGenerationRange));
  };
  for (RenderLayer & layer : m_layers)
    layer.m_isDirty |= RemoveGroups(removePredicate, layer.m_renderGroups, make_ref(m_overlayTree));

  if (m_forceUpdateScene || m_forceUpdateUserMarks || m_lastReadedModelView != modelView)
  {
    EmitModelViewChanged(modelView);
    m_lastReadedModelView = modelView;
    m_requestedTiles->Set(modelView, m_isIsometry || modelView.isPerspective(), m_forceUpdateScene,
                          m_forceUpdateUserMarks, ResolveTileKeys(modelView));
    m_commutator->PostMessage(ThreadsCommutator::ResourceUploadThread, make_unique_dp<UpdateReadManagerMessage>(),
                              MessagePriority::UberHighSingleton);
    m_forceUpdateScene = false;
    m_forceUpdateUserMarks = false;
  }
}

void FrontendRenderer::EmitModelViewChanged(ScreenBase const & modelView) const
{