/MapView/Map/RMDBTileImage.m

http://github.com/route-me/route-me · Objective C · 58 lines · 18 code · 8 blank · 32 comment · 4 complexity · d5d33c4ad255cab102eb3b2968b947e4 MD5 · raw file

  1. //
  2. // RMDBTileImage.m
  3. //
  4. // Copyright (c) 2009, Frank Schroeder, SharpMind GbR
  5. // All rights reserved.
  6. //
  7. // Redistribution and use in source and binary forms, with or without
  8. // modification, are permitted provided that the following conditions are met:
  9. //
  10. // * Redistributions of source code must retain the above copyright notice, this
  11. // list of conditions and the following disclaimer.
  12. // * Redistributions in binary form must reproduce the above copyright notice,
  13. // this list of conditions and the following disclaimer in the documentation
  14. // and/or other materials provided with the distribution.
  15. //
  16. // THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
  17. // AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  18. // IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  19. // ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
  20. // LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
  21. // CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
  22. // SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
  23. // INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
  24. // CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
  25. // ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
  26. // POSSIBILITY OF SUCH DAMAGE.
  27. // RMDBTileImage is a tile image implementation for the RMDBMapSource.
  28. //
  29. // See RMDBMapSource.m for a full documentation on the database schema.
  30. //
  31. #import "RMDBTileImage.h"
  32. #define FMDBErrorCheck(db) { if ([db hadError]) { NSLog(@"DB error %d on line %d: %@", [db lastErrorCode], __LINE__, [db lastErrorMessage]); } }
  33. @implementation RMDBTileImage
  34. - (id)initWithTile:(RMTile)_tile fromDB:(FMDatabase*)db {
  35. self = [super initWithTile:_tile];
  36. if (self != nil) {
  37. // get the unique key for the tile
  38. NSNumber* key = [NSNumber numberWithLongLong:RMTileKey(_tile)];
  39. RMLog(@"fetching tile %@ (y:%d, x:%d)@%d", key, _tile.y, _tile.x, _tile.zoom);
  40. // fetch the image from the db
  41. FMResultSet* rs = [db executeQuery:@"select image from tiles where tilekey = ?", key];
  42. FMDBErrorCheck(db);
  43. if ([rs next]) {
  44. [self updateImageUsingImage:[[[UIImage alloc] initWithData:[rs dataForColumn:@"image"]] autorelease]];
  45. }
  46. [rs close];
  47. }
  48. return self;
  49. }
  50. @end