layercoordinator.hh

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/*
 * Scroom - Generic viewer for 2D data
 * Copyright (C) 2009-2022 Kees-Jan Dijkzeul
 *
 * SPDX-License-Identifier: LGPL-2.1
 */
 
#pragma once
 
#include <map>
#include <utility>
 
#include <boost/enable_shared_from_this.hpp>
#include <boost/shared_ptr.hpp>
#include <boost/thread.hpp>
 
#include <scroom/tiledbitmaplayer.hh>
 
class LayerCoordinator
  : public TileInitialisationObserver
  , public virtual Scroom::Utils::Base
{
private:
  CompressedTile::Ptr                                targetTile;
  Tile::Ptr                                          targetTileData;
  std::map<CompressedTile::Ptr, std::pair<int, int>> sourceTiles;
  Scroom::Utils::StuffList                           registrations;
  LayerOperations::Ptr                               lo;
  boost::mutex                                       mut;
  int                                                unfinishedSourceTiles{0};
 
public:
  using Ptr = boost::shared_ptr<LayerCoordinator>;
 
  static Ptr create(CompressedTile::Ptr targetTile, LayerOperations::Ptr lo);
 
  ~LayerCoordinator() override;
  LayerCoordinator(const LayerCoordinator&)           = delete;
  LayerCoordinator(LayerCoordinator&&)                = delete;
  LayerCoordinator operator=(const LayerCoordinator&) = delete;
  LayerCoordinator operator=(LayerCoordinator&&)      = delete;
 
  void addSourceTile(int x, int y, const CompressedTile::Ptr& tile);
 
private:
  LayerCoordinator(CompressedTile::Ptr targetTile, LayerOperations::Ptr lo);
 
  void reduceSourceTile(const CompressedTile::Ptr& tile, ConstTile::Ptr const& tileData);
 
public:
  void tileFinished(const CompressedTile::Ptr& tile) override;
};