@interface PackedImages : NSObject {
   NSMutableDictionary *_nameToImage;
}

- (id) init:(NSString*)packFileName;
- (Image*) getImageNamed:(NSString*)name;
- (BOOL) hasImageNamed:(NSString*)name;

@end


@implementation PackedImages

- (id) init:(NSString*)packFileName {
   self = [super init];
   if (!self) return nil;

   _nameToImage = [[NSMutableDictionary alloc] init];

   NSString *packPath = [[NSBundle mainBundle] pathForResource:packFileName ofType:@"pack"];
   NSLog(@"Loading packed images: %@", packPath);

   FILE *file = fopen([packPath UTF8String], "rt");
   Image *pageImage = nil;
   while (true) {
      char nameString[256];
      if (fscanf(file, "%s", &nameString) == EOF) {
         [pageImage release];
         break;
      }
      NSString *name = [NSString stringWithCString:nameString encoding:NSASCIIStringEncoding];
      if ([name length] == 0) {
         [pageImage release];
         pageImage = nil;
      } else if (pageImage == nil) {
         pageImage = [[Image alloc] initWithImageNamed:name];
      } else {
         int left, top, right, bottom, offsetX, offsetY, index;
         fscanf(file, "%d", &left);
         fscanf(file, "%d", &top);
         fscanf(file, "%d", &right);
         fscanf(file, "%d", &bottom);
         fscanf(file, "%d", &offsetX);
         fscanf(file, "%d", &offsetY);
         if (!fscanf(file, "%d", &index)) index = 9999999;
         Image *image = [[Image alloc] initWithSubImage:pageImage rect:CGRectMake(left, top, right - left, bottom - top)];
         [image setOffset:offsetX y:offsetY];
         [_nameToImage setValue:image forKey:name];
         [image release];
      }
   }

   return self;
}

- (Image*) getImageNamed:(NSString*)name {
   Image* image = [_nameToImage valueForKey:name];
   if (image == nil) NSLog(@"WARN: Packed image not found: %@", name);
   return image;
}

- (BOOL) hasImageNamed:(NSString*)name {
   return [_nameToImage valueForKey:name] != nil;
}

- (void) dealloc {
   [_nameToImage release];
   [super dealloc];
}

@end