text: /****************************************************************************
  Copyright (c) 2009-2010 Ricardo Quesada
  Copyright (c) 2010-2012 cocos2d-x.org
  Copyright (c) 2011      Zynga Inc.
  Copyright (c) 2013-2017 Chukong Technologies Inc.
  
  http://www.cocos2d-x.org
  
  Permission is hereby granted, free of charge, to any person obtaining a copy
  of this software and associated documentation files (the "Software"), to deal
  in the Software without restriction, including without limitation the rights
  to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
  copies of the Software, and to permit persons to whom the Software is
  furnished to do so, subject to the following conditions:
  
  The above copyright notice and this permission notice shall be included in
  all copies or substantial portions of the Software.
  
  THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
  AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
  LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
  OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
  THE SOFTWARE.
  ****************************************************************************/
  #include "2d/CCFastTMXTiledMap.h"
  #include "2d/CCFastTMXLayer.h"
  #include "base/ccUTF8.h"
  
  NS_CC_BEGIN
  namespace experimental {
  
  // implementation FastTMXTiledMap
  
  TMXTiledMap * TMXTiledMap::create(const std::string& tmxFile)
  {
      TMXTiledMap *ret = new (std::nothrow) TMXTiledMap();
      if (ret->initWithTMXFile(tmxFile))
      {
          ret->autorelease();
          return ret;
      }
      CC_SAFE_DELETE(ret);
      return nullptr;
  }
  
  TMXTiledMap* TMXTiledMap::createWithXML(const std::string& tmxString, const std::string& resourcePath)
  {
      TMXTiledMap *ret = new (std::nothrow) TMXTiledMap();
      if (ret->initWithXML(tmxString, resourcePath))
      {
          ret->autorelease();
          return ret;
      }
      CC_SAFE_DELETE(ret);
      return nullptr;
  }
  
  bool TMXTiledMap::initWithTMXFile(const std::string& tmxFile)
  {
      CCASSERT(tmxFile.size()>0, "FastTMXTiledMap: tmx file should not be empty");
      
      setContentSize(Size::ZERO);
  
      TMXMapInfo *mapInfo = TMXMapInfo::create(tmxFile);
  
      if (! mapInfo)
      {
          return false;
      }
      CCASSERT( !mapInfo->getTilesets().empty(), "FastTMXTiledMap: Map not found. Please check the filename.");
      buildWithMapInfo(mapInfo);
  
      return true;
  }
  
  bool TMXTiledMap::initWithXML(const std::string& tmxString, const std::string& resourcePath)
  {
      setContentSize(Size::ZERO);
  
      TMXMapInfo *mapInfo = TMXMapInfo::createWithXML(tmxString, resourcePath);
  
      CCASSERT( !mapInfo->getTilesets().empty(), "FastTMXTiledMap: Map not found. Please check the filename.");
      buildWithMapInfo(mapInfo);
  
      return true;
  }
  
  TMXTiledMap::TMXTiledMap()
      :_mapSize(Size::ZERO)
      ,_tileSize(Size::ZERO)        
  {
  }
  
  TMXTiledMap::~TMXTiledMap()
  {
  }
  
  // private
  TMXLayer * TMXTiledMap::parseLayer(TMXLayerInfo *layerInfo, TMXMapInfo *mapInfo)
  {
      TMXTilesetInfo *tileset = tilesetForLayer(layerInfo, mapInfo);
      if (tileset == nullptr)
          return nullptr;
      
      TMXLayer *layer = TMXLayer::create(tileset, layerInfo, mapInfo);
  
      // tell the layerinfo to release the ownership of the tiles map.
      layerInfo->_ownTiles = false;
      layer->setupTiles();
  
      return layer;
  }
  
  TMXTilesetInfo * TMXTiledMap::tilesetForLayer(TMXLayerInfo *layerInfo, TMXMapInfo *mapInfo)
  {
      Size size = layerInfo->_layerSize;
      auto& tilesets = mapInfo->getTilesets();
  
      for (auto iter = tilesets.crbegin(), iterCrend = tilesets.crend(); iter != iterCrend; ++iter)
      {
          TMXTilesetInfo* tilesetInfo = *iter;
          if (tilesetInfo)
          {
              for( int y=0; y < size.height; y++ )
              {
                  for( int x=0; x < size.width; x++ )
                  {
                      uint32_t pos = static_cast<uint32_t>(x + size.width * y);
                      uint32_t gid = layerInfo->_tiles[ pos ];
                      
                      // gid are stored in little endian.
                      // if host is big endian, then swap
                      //if( o == CFByteOrderBigEndian )
                      //    gid = CFSwapInt32( gid );
                      /* We support little endian.*/
                      
                      // FIXME: gid == 0 --> empty tile
                      if( gid != 0 )
                      {
                          // Optimization: quick return
                          // if the layer is invalid (more than 1 tileset per layer) an CCAssert will be thrown later
                          if( (gid & kTMXFlippedMask)
                              >= static_cast<uint32_t>(tilesetInfo->_firstGid))
                          {
                              return tilesetInfo;
                          }
                      }
                  }
              }
          }
      }
  
      // If all the tiles are 0, return empty tileset
      CCLOG("cocos2d: Warning: TMX Layer '%s' has no tiles", layerInfo->_name.c_str());
      return nullptr;
  }
  
  void TMXTiledMap::buildWithMapInfo(TMXMapInfo* mapInfo)
  {
      _mapSize = mapInfo->getMapSize();
      _tileSize = mapInfo->getTileSize();
      _mapOrientation = mapInfo->getOrientation();
  
      _objectGroups = mapInfo->getObjectGroups();
  
      _properties = mapInfo->getProperties();
  
      _tileProperties = mapInfo->getTileProperties();
  
      int idx=0;
  
      auto& layers = mapInfo->getLayers();
      for(const auto &layerInfo : layers) {
          if (layerInfo->_visible)
          {
              TMXLayer *child = parseLayer(layerInfo, mapInfo);
              if (child == nullptr) {
                  idx++;
                  continue;
              }
              addChild(child, idx, idx);
              
              // update content size with the max size
              const Size& childSize = child->getContentSize();
              Size currentSize = this->getContentSize();
              currentSize.width = std::max( currentSize.width, childSize.width );
              currentSize.height = std::max( currentSize.height, childSize.height );
              this->setContentSize(currentSize);
              
              idx++;
          }
      }
  }
  
  // public
  TMXLayer * TMXTiledMap::getLayer(const std::string& layerName) const
  {
      CCASSERT(layerName.size() > 0, "Invalid layer name!");
      
      for (auto& child : _children)
      {
          TMXLayer* layer = dynamic_cast<TMXLayer*>(child);
          if(layer)
          {
              if(layerName.compare( layer->getLayerName()) == 0)
              {
                  return layer;
              }
          }
      }
  
      // layer not found
      return nullptr;
  }
  
  TMXObjectGroup * TMXTiledMap::getObjectGroup(const std::string& groupName) const
  {
      CCASSERT(groupName.size() > 0, "Invalid group name!");
  
      if (_objectGroups.size()>0)
      {
          for (const auto& objectGroup : _objectGroups)
          {
              if (objectGroup && objectGroup->getGroupName() == groupName)
              {
                  return objectGroup;
              }
          }
      }
  
      // objectGroup not found
      return nullptr;
  }
  
  Value TMXTiledMap::getProperty(const std::string& propertyName) const
  {
      auto propsItr = _properties.find(propertyName);
      if (propsItr != _properties.end())
          return propsItr->second;
      
      return Value();
  }
  
  Value TMXTiledMap::getPropertiesForGID(int GID) const
  {
      auto propsItr = _tileProperties.find(GID);
      if (propsItr != _tileProperties.end())
          return propsItr->second;
      
      return Value();
  }
  
  std::string TMXTiledMap::getDescription() const
  {
      return StringUtils::format("<FastTMXTiledMap | Tag = %d, Layers = %d", _tag, static_cast<int>(_children.size()));
  }
  
  } //end of namespace experimental
  
  NS_CC_END
  
  