core/src/ru/deadsoftware/cavedroid/game/GameSaver.java

   1 package ru.deadsoftware.cavedroid.game;
   2
   3 import com.badlogic.gdx.Gdx;
   4 import com.badlogic.gdx.files.FileHandle;
   5 import ru.deadsoftware.cavedroid.CaveGame;
   6
   7 import java.io.*;
   8 import java.nio.ByteBuffer;
   9
  10 public class GameSaver {
  11
  12     private static final int VERSION = 0;
  13
  14     private static byte[] intToBytes(int i) {
  15         return ByteBuffer.allocate(4).putInt(i).array();
  16     }
  17
  18     private static void saveMap(FileHandle file, int[][] map) throws IOException {
  19         int rl, bl;
  20         int width = map.length;
  21         int height = map[0].length;
  22         BufferedOutputStream out = new BufferedOutputStream(file.write(false));
  23         out.write(intToBytes(VERSION));
  24         out.write(intToBytes(width));
  25         out.write(intToBytes(height));
  26         for (int y = 0; y < height; y++) {
  27             bl = map[0][y];
  28             rl = 0;
  29             for (int x = 0; x < width; x++) {
  30                 if (map[x][y] != bl) {
  31                     out.write(intToBytes(rl));
  32                     out.write(intToBytes(bl));
  33                     rl = 0;
  34                     bl = map[x][y];
  35                 }
  36                 rl++;
  37             }
  38             out.write(intToBytes(rl));
  39             out.write(intToBytes(bl));
  40         }
  41         out.flush();
  42         out.close();
  43     }
  44
  45     private static int[][] loadMap(FileHandle file) throws Exception {
  46         int[][] map;
  47         int ver, width, height;
  48         int rl, bl;
  49         DataInputStream in = new DataInputStream(file.read());
  50         ver = in.readInt();
  51         if (VERSION == ver) {
  52             width = in.readInt();
  53             height = in.readInt();
  54             map = new int[width][height];
  55             for (int y = 0; y < height; y++) {
  56                 for (int x = 0; x < width; x += rl) {
  57                     rl = in.readInt();
  58                     bl = in.readInt();
  59                     for (int i = x; i < x + rl; i++) map[i][y] = bl;
  60                 }
  61             }
  62             in.close();
  63         } else throw new Exception("version mismatch");
  64         return map;
  65     }
  66
  67     public static GameProc load() {
  68         FileHandle file = Gdx.files.absolute(CaveGame.GAME_FOLDER + "/saves/game.sav");
  69         GameProc gameProc = null;
  70         try {
  71             ObjectInputStream in = new ObjectInputStream(file.read());
  72             int ver = in.readInt();
  73             if (VERSION == ver) gameProc = (GameProc) in.readObject();
  74             else throw new Exception("version mismatch");
  75             in.close();
  76             gameProc.world = new GameWorld();
  77             gameProc.world.setMaps(
  78                     loadMap(Gdx.files.absolute(CaveGame.GAME_FOLDER + "/saves/foremap.sav")),
  79                     loadMap(Gdx.files.absolute(CaveGame.GAME_FOLDER + "/saves/backmap.sav"))
  80             );
  81             gameProc.physics = new GamePhysics();
  82             gameProc.resetRenderer();
  83         } catch (Exception e) {
  84             Gdx.app.error("GameSaver", e.getMessage(), e);
  85             Gdx.app.exit();
  86         }
  87         return gameProc;
  88     }
  89
  90     public static void save(GameProc gp) {
  91         FileHandle file = Gdx.files.absolute(CaveGame.GAME_FOLDER + "/saves/");
  92         file.mkdirs();
  93         file = Gdx.files.absolute(CaveGame.GAME_FOLDER + "/saves/game.sav");
  94         try {
  95             ObjectOutputStream out = new ObjectOutputStream(file.write(false));
  96             out.writeInt(VERSION);
  97             out.writeObject(gp);
  98             out.close();
  99             saveMap(Gdx.files.absolute(CaveGame.GAME_FOLDER + "/saves/foremap.sav"), gp.world.getFullForeMap());
 100             saveMap(Gdx.files.absolute(CaveGame.GAME_FOLDER + "/saves/backmap.sav"), gp.world.getFullBackMap());
 101         } catch (Exception e) {
 102             e.printStackTrace();
 103         }
 104     }
 105
 106     public static boolean exists() {
 107         return (Gdx.files.absolute(CaveGame.GAME_FOLDER + "/saves/game.sav").exists() &&
 108                 Gdx.files.absolute(CaveGame.GAME_FOLDER + "/saves/foremap.sav").exists() &&
 109                 Gdx.files.absolute(CaveGame.GAME_FOLDER + "/saves/backmap.sav").exists());
 110     }
 111
 112 }