axmol/cocos/2d/CCTMXTiledMap.cpp

/****************************************************************************
Copyright (c) 2010-2012 cocos2d-x.org
Copyright (c) 2009-2010 Ricardo Quesada
Copyright (c) 2011      Zynga Inc.

http://www.cocos2d-x.org

Permission is hereby granted, free of charge, to any person obtaining a copy
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IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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****************************************************************************/
#include "CCTMXTiledMap.h"
#include "CCTMXXMLParser.h"
#include "CCTMXLayer.h"
#include "CCSprite.h"
#include <algorithm>

NS_CC_BEGIN

// implementation TMXTiledMap

TMXTiledMap * TMXTiledMap::create(const std::string& tmxFile)
{
    TMXTiledMap *ret = new 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 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, "TMXTiledMap: tmx file should not be empty");
    
    setContentSize(Size::ZERO);

    TMXMapInfo *mapInfo = TMXMapInfo::create(tmxFile);

    if (! mapInfo)
    {
        return false;
    }
    CCASSERT( !mapInfo->getTilesets().empty(), "TMXTiledMap: 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(), "TMXTiledMap: 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);
    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();
    if (tilesets.size()>0)
    {
        TMXTilesetInfo* tileset = nullptr;
        for (auto iter = tilesets.crbegin(); iter != tilesets.crend(); ++iter)
        {
            tileset = *iter;
            if (tileset)
            {
                for( unsigned int y=0; y < size.height; y++ )
                {
                    for( unsigned int x=0; x < size.width; x++ ) 
                    {
                        unsigned int pos = (unsigned int)(x + size.width * y);
                        unsigned int 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.*/

                        // XXX: 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 & kFlippedMask) >= tileset->_firstGid )
                                return tileset;
                        }
                    }
                }        
            }
        }
    }

    // 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();
    std::for_each(layers.begin(), layers.end(), [&idx, this, &mapInfo](TMXLayerInfo* layerInfo){
        if (layerInfo && layerInfo->_visible)
        {
            TMXLayer *child = parseLayer(layerInfo, mapInfo);
            addChild((Node*)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)
    {
        TMXObjectGroup* objectGroup = nullptr;
        for (auto iter = _objectGroups.cbegin(); iter != _objectGroups.cend(); ++iter)
        {
            objectGroup = *iter;
            if (objectGroup && objectGroup->getGroupName() == groupName)
            {
                return objectGroup;
            }
        }
    }

    // objectGroup not found
    return nullptr;
}

Value TMXTiledMap::getProperty(const std::string& propertyName) const
{
    if (_properties.find(propertyName) != _properties.end())
        return _properties.at(propertyName);
    
    return Value();
}

Value TMXTiledMap::getPropertiesForGID(int GID) const
{
    if (_tileProperties.find(GID) != _tileProperties.end())
        return _tileProperties.at(GID);
    
    return Value();
}

std::string TMXTiledMap::getDescription() const
{
    return StringUtils::format("<TMXTiledMap | Tag = %d, Layers = %zd", _tag, _children.size());
}


NS_CC_END