Method InvalidateRect

libs/drape_frontend/frontend_renderer.cpp:1106–1144

}

void FrontendRenderer::InvalidateRect(m2::RectD const & gRect)
{
  ScreenBase const screen = m_userEventStream.GetCurrentScreen();
  m2::RectD rect = gRect;
  if (rect.Intersect(screen.ClipRect()))
  {
    // Find tiles to invalidate.
    TTilesCollection tiles;
    int const dataZoomLevel = ClipTileZoomByMaxDataZoom(GetCurrentZoom());
    CalcTilesCoverage(rect, dataZoomLevel, [this, &rect, &tiles](int tileX, int tileY)
    {
      TileKey const key(tileX, tileY, GetCurrentZoom());
      if (rect.IsIntersect(key.GetGlobalRect()))
        tiles.insert(key);
    });

    // Remove tiles to invalidate from screen.
    auto eraseFunction = [&tiles](drape_ptr<RenderGroup> const & group)
    { return tiles.find(group->GetTileKey()) != tiles.end(); };
    for (RenderLayer & layer : m_layers)
    {
      RemoveGroups(eraseFunction, layer.m_renderGroups, make_ref(m_overlayTree));
      layer.m_isDirty = true;
    }

    // Remove tiles to invalidate from backend renderer.
    BaseBlockingMessage::Blocker blocker;
    m_commutator->PostMessage(ThreadsCommutator::ResourceUploadThread,
                              make_unique_dp<InvalidateReadManagerRectMessage>(blocker, tiles), MessagePriority::High);
    blocker.Wait();

    // Request new tiles.
    m_lastReadedModelView = screen;
    m_requestedTiles->Set(screen, m_isIsometry || screen.isPerspective(), m_forceUpdateScene, m_forceUpdateUserMarks,
                          ResolveTileKeys(screen));
    m_commutator->PostMessage(ThreadsCommutator::ResourceUploadThread, make_unique_dp<UpdateReadManagerMessage>(),
                              MessagePriority::UberHighSingleton);
  }
}

void FrontendRenderer::OnResize(ScreenBase const & screen)
{