/libs/cocos2d/CCTMXTiledMap.m

  1/*
  2 * cocos2d for iPhone: http://www.cocos2d-iphone.org
  3 *
  4 * Copyright (c) 2009-2010 Ricardo Quesada
  5 * 
  6 * Permission is hereby granted, free of charge, to any person obtaining a copy
  7 * of this software and associated documentation files (the "Software"), to deal
  8 * in the Software without restriction, including without limitation the rights
  9 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
 10 * copies of the Software, and to permit persons to whom the Software is
 11 * furnished to do so, subject to the following conditions:
 12 * 
 13 * The above copyright notice and this permission notice shall be included in
 14 * all copies or substantial portions of the Software.
 15 * 
 16 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 17 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 18 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 19 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 20 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 21 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
 22 * THE SOFTWARE.
 23 *
 24 *
 25 * TMX Tiled Map support:
 26 * http://www.mapeditor.org
 27 *
 28 */
 29
 30#import "CCTMXTiledMap.h"
 31#import "CCTMXXMLParser.h"
 32#import "CCTMXLayer.h"
 33#import "CCTMXObjectGroup.h"
 34#import "CCSprite.h"
 35#import "CCSpriteSheet.h"
 36#import "CCTextureCache.h"
 37#import "Support/CGPointExtension.h"
 38
 39
 40#pragma mark -
 41#pragma mark CCTMXTiledMap
 42
 43@interface CCTMXTiledMap (Private)
 44-(id) parseLayer:(CCTMXLayerInfo*)layer map:(CCTMXMapInfo*)mapInfo;
 45-(CCTMXTilesetInfo*) tilesetForLayer:(CCTMXLayerInfo*)layerInfo map:(CCTMXMapInfo*)mapInfo;
 46@end
 47
 48@implementation CCTMXTiledMap
 49@synthesize mapSize=mapSize_;
 50@synthesize tileSize=tileSize_;
 51@synthesize mapOrientation=mapOrientation_;
 52@synthesize objectGroups=objectGroups_;
 53@synthesize properties=properties_;
 54
 55+(id) tiledMapWithTMXFile:(NSString*)tmxFile
 56{
 57	return [[[self alloc] initWithTMXFile:tmxFile] autorelease];
 58}
 59
 60-(id) initWithTMXFile:(NSString*)tmxFile
 61{
 62	NSAssert(tmxFile != nil, @"TMXTiledMap: tmx file should not bi nil");
 63
 64	if ((self=[super init])) {
 65		
 66		[self setContentSize:CGSizeZero];
 67
 68		CCTMXMapInfo *mapInfo = [CCTMXMapInfo formatWithTMXFile:tmxFile];
 69		
 70		NSAssert( [mapInfo.tilesets count] != 0, @"TMXTiledMap: Map not found. Please check the filename.");
 71		
 72		mapSize_ = mapInfo.mapSize;
 73		tileSize_ = mapInfo.tileSize;
 74		mapOrientation_ = mapInfo.orientation;
 75		objectGroups_ = [mapInfo.objectGroups retain];
 76		properties_ = [mapInfo.properties retain];
 77		tileProperties_ = [mapInfo.tileProperties retain];
 78				
 79		int idx=0;
 80
 81		for( CCTMXLayerInfo *layerInfo in mapInfo.layers ) {
 82			
 83			if( layerInfo.visible ) {
 84				id child = [self parseLayer:layerInfo map:mapInfo];
 85				[self addChild:child z:idx tag:idx];
 86				
 87				// update content size with the max size
 88				CGSize childSize = [child contentSize];
 89				CGSize currentSize = [self contentSize];
 90				currentSize.width = MAX( currentSize.width, childSize.width );
 91				currentSize.height = MAX( currentSize.height, childSize.height );
 92				[self setContentSize:currentSize];
 93	
 94				idx++;
 95			}			
 96		}		
 97	}
 98
 99	return self;
100}
101
102-(void) dealloc
103{
104	[objectGroups_ release];
105	[properties_ release];
106	[tileProperties_ release];
107	[super dealloc];
108}
109
110// private
111-(id) parseLayer:(CCTMXLayerInfo*)layerInfo map:(CCTMXMapInfo*)mapInfo
112{
113	CCTMXTilesetInfo *tileset = [self tilesetForLayer:layerInfo map:mapInfo];
114	CCTMXLayer *layer = [CCTMXLayer layerWithTilesetInfo:tileset layerInfo:layerInfo mapInfo:mapInfo];
115
116	// tell the layerinfo to release the ownership of the tiles map.
117	layerInfo.ownTiles = NO;
118
119	[layer setupTiles];
120	
121	return layer;
122}
123
124-(CCTMXTilesetInfo*) tilesetForLayer:(CCTMXLayerInfo*)layerInfo map:(CCTMXMapInfo*)mapInfo
125{
126	CFByteOrder o = CFByteOrderGetCurrent();
127	
128	CGSize size = layerInfo.layerSize;
129
130	id iter = [mapInfo.tilesets reverseObjectEnumerator];
131	for( CCTMXTilesetInfo* tileset in iter) {
132		for( unsigned int y=0; y < size.height; y++ ) {
133			for( unsigned int x=0; x < size.width; x++ ) {
134				
135				unsigned int pos = x + size.width * y;
136				unsigned int gid = layerInfo.tiles[ pos ];
137				
138				// gid are stored in little endian.
139				// if host is big endian, then swap
140				if( o == CFByteOrderBigEndian )
141					gid = CFSwapInt32( gid );
142				
143				// XXX: gid == 0 --> empty tile
144				if( gid != 0 ) {
145					
146					// Optimization: quick return
147					// if the layer is invalid (more than 1 tileset per layer) an assert will be thrown later
148					if( gid >= tileset.firstGid )
149						return tileset;
150				}
151			}
152		}		
153	}
154	
155	// If all the tiles are 0, return empty tileset
156	CCLOG(@"cocos2d: Warning: TMX Layer '%@' has no tiles", layerInfo.name);
157	return nil;
158}
159
160
161// public
162
163-(CCTMXLayer*) layerNamed:(NSString *)layerName 
164{
165	for( CCTMXLayer *layer in children_ ) {
166		if([layer isKindOfClass:[CCTMXLayer class]]){
167			if( [layer.layerName isEqual:layerName] )
168				return layer;
169		}
170	}
171	
172	// layer not found
173	return nil;
174}
175
176-(CCTMXObjectGroup*) objectGroupNamed:(NSString *)groupName 
177{
178	for( CCTMXObjectGroup *objectGroup in objectGroups_ ) {
179		if( [objectGroup.groupName isEqual:groupName] )
180			return objectGroup;
181		}
182	
183	// objectGroup not found
184	return nil;
185}
186
187// XXX deprecated
188-(CCTMXObjectGroup*) groupNamed:(NSString *)groupName 
189{
190	return [self objectGroupNamed:groupName];
191}
192
193-(id) propertyNamed:(NSString *)propertyName 
194{
195	return [properties_ valueForKey:propertyName];
196}
197-(NSDictionary*)propertiesForGID:(unsigned int)GID{
198	return [tileProperties_ objectForKey:[NSNumber numberWithInt:GID]];
199}
200@end
201