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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all copies or substantial portions of the Software.

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IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
THE SOFTWARE.
****************************************************************************/
#include "CCTMXTiledMap.h"
#include "CCTMXXMLParser.h"
#include "CCTMXLayer.h"
#include "CCSprite.h"

NS_CC_BEGIN

// implementation TMXTiledMap

TMXTiledMap * TMXTiledMap::create(const char *tmxFile)
{
    TMXTiledMap *pRet = new TMXTiledMap();
    if (pRet->initWithTMXFile(tmxFile))
    {
        pRet->autorelease();
        return pRet;
    }
    CC_SAFE_DELETE(pRet);
    return NULL;
}

TMXTiledMap* TMXTiledMap::createWithXML(const char* tmxString, const char* resourcePath)
{
    TMXTiledMap *pRet = new TMXTiledMap();
    if (pRet->initWithXML(tmxString, resourcePath))
    {
        pRet->autorelease();
        return pRet;
    }
    CC_SAFE_DELETE(pRet);
    return NULL;
}

bool TMXTiledMap::initWithTMXFile(const char *tmxFile)
{
    CCASSERT(tmxFile != NULL && strlen(tmxFile)>0, "TMXTiledMap: tmx file should not bi NULL");
    
    setContentSize(Size::ZERO);

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

    if (! mapInfo)
    {
        return false;
    }
    CCASSERT( mapInfo->getTilesets()->count() != 0, "TMXTiledMap: Map not found. Please check the filename.");
    buildWithMapInfo(mapInfo);

    return true;
}

bool TMXTiledMap::initWithXML(const char* tmxString, const char* resourcePath)
{
    setContentSize(Size::ZERO);

    TMXMapInfo *mapInfo = TMXMapInfo::createWithXML(tmxString, resourcePath);

    CCASSERT( mapInfo->getTilesets()->count() != 0, "TMXTiledMap: Map not found. Please check the filename.");
    buildWithMapInfo(mapInfo);

    return true;
}

TMXTiledMap::TMXTiledMap()
    :_mapSize(Size::ZERO)
    ,_tileSize(Size::ZERO)        
    ,_objectGroups(NULL)
    ,_properties(NULL)
    ,_tileProperties(NULL)
{
}
TMXTiledMap::~TMXTiledMap()
{
    CC_SAFE_RELEASE(_properties);
    CC_SAFE_RELEASE(_objectGroups);
    CC_SAFE_RELEASE(_tileProperties);
}

// 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;
    Array* tilesets = mapInfo->getTilesets();
    if (tilesets && tilesets->count()>0)
    {
        TMXTilesetInfo* tileset = NULL;
        Object* pObj = NULL;
        CCARRAY_FOREACH_REVERSE(tilesets, pObj)
        {
            tileset = static_cast<TMXTilesetInfo*>(pObj);
            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 NULL;
}

void TMXTiledMap::buildWithMapInfo(TMXMapInfo* mapInfo)
{
    _mapSize = mapInfo->getMapSize();
    _tileSize = mapInfo->getTileSize();
    _mapOrientation = mapInfo->getOrientation();

    CC_SAFE_RELEASE(_objectGroups);
    _objectGroups = mapInfo->getObjectGroups();
    CC_SAFE_RETAIN(_objectGroups);

    CC_SAFE_RELEASE(_properties);
    _properties = mapInfo->getProperties();
    CC_SAFE_RETAIN(_properties);

    CC_SAFE_RELEASE(_tileProperties);
    _tileProperties = mapInfo->getTileProperties();
    CC_SAFE_RETAIN(_tileProperties);

    int idx=0;

    Array* layers = mapInfo->getLayers();
    if (layers && layers->count()>0)
    {
        TMXLayerInfo* layerInfo = NULL;
        Object* pObj = NULL;
        CCARRAY_FOREACH(layers, pObj)
        {
            layerInfo = static_cast<TMXLayerInfo*>(pObj);
            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 = MAX( currentSize.width, childSize.width );
                currentSize.height = MAX( currentSize.height, childSize.height );
                this->setContentSize(currentSize);

                idx++;
            }
        }
    }
}

// public
TMXLayer * TMXTiledMap::getLayer(const char *layerName) const
{
    CCASSERT(layerName != NULL && strlen(layerName) > 0, "Invalid layer name!");
    Object* pObj = NULL;
    CCARRAY_FOREACH(_children, pObj) 
    {
        TMXLayer* layer = dynamic_cast<TMXLayer*>(pObj);
        if(layer)
        {
            if(0 == strcmp(layer->getLayerName(), layerName))
            {
                return layer;
            }
        }
    }

    // layer not found
    return NULL;
}

TMXObjectGroup * TMXTiledMap::getObjectGroup(const char *groupName) const
{
    CCASSERT(groupName != NULL && strlen(groupName) > 0, "Invalid group name!");

    std::string sGroupName = groupName;
    if (_objectGroups && _objectGroups->count()>0)
    {
        TMXObjectGroup* objectGroup = NULL;
        Object* pObj = NULL;
        CCARRAY_FOREACH(_objectGroups, pObj)
        {
            objectGroup = static_cast<TMXObjectGroup*>(pObj);
            if (objectGroup && objectGroup->getGroupName() == sGroupName)
            {
                return objectGroup;
            }
        }
    }

    // objectGroup not found
    return NULL;
}

String* TMXTiledMap::getProperty(const char *propertyName) const
{
    return static_cast<String*>(_properties->objectForKey(propertyName));
}

Dictionary* TMXTiledMap::getPropertiesForGID(int GID) const
{
    return static_cast<Dictionary*>(_tileProperties->objectForKey(GID));
}
        

NS_CC_END