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
  15     private static byte[] intToBytes(int i) {
  16         return ByteBuffer.allocate(4).putInt(i).array();
  17     }
  18
  19     private static void saveMap(FileHandle file, int[][] map) throws IOException {
  20         int rl, bl;
  21         int width = map.length;
  22         int height = map[0].length;
  23         BufferedOutputStream out = new BufferedOutputStream(file.write(false));
  24         out.write(intToBytes(VERSION));
  25         out.write(intToBytes(width));
  26         out.write(intToBytes(height));
  27         for (int y = 0; y < height; y++) {
  28             bl = map[0][y];
  29             rl = 0;
  30             for (int[] ints : map) {
  31                 if (ints[y] != bl) {
  32                     out.write(intToBytes(rl));
  33                     out.write(intToBytes(bl));
  34                     rl = 0;
  35                     bl = ints[y];
  36                 }
  37                 rl++;
  38             }
  39             out.write(intToBytes(rl));
  40             out.write(intToBytes(bl));
  41         }
  42         out.flush();
  43         out.close();
  44     }
  45
  46
  47     private static int[][] loadMap(FileHandle file) throws Exception {
  48         int[][] map;
  49         int ver, width, height;
  50         int rl, bl;
  51         DataInputStream in = new DataInputStream(file.read());
  52         ver = in.readInt();
  53         if (VERSION == ver) {
  54             width = in.readInt();
  55             height = in.readInt();
  56             map = new int[width][height];
  57             for (int y = 0; y < height; y++) {
  58                 for (int x = 0; x < width; x += rl) {
  59                     rl = in.readInt();
  60                     bl = in.readInt();
  61                     for (int i = x; i < x + rl; i++) map[i][y] = bl;
  62                 }
  63             }
  64             in.close();
  65         } else throw new Exception("version mismatch");
  66         return map;
  67     }
  68
  69     public static GameProc load() {
  70         FileHandle file = Gdx.files.absolute(CaveGame.GAME_FOLDER + "/saves/game.sav");
  71         GameProc gameProc = null;
  72         try {
  73             ObjectInputStream in = new ObjectInputStream(file.read());
  74             int ver = in.readInt();
  75             if (VERSION == ver) gameProc = (GameProc) in.readObject();
  76             else throw new Exception("version mismatch");
  77             in.close();
  78             gameProc.world = new GameWorld(
  79                     loadMap(Gdx.files.absolute(CaveGame.GAME_FOLDER + "/saves/foremap.sav")),
  80                     loadMap(Gdx.files.absolute(CaveGame.GAME_FOLDER + "/saves/backmap.sav"))
  81             );
  82             gameProc.physics = new GamePhysics();
  83             gameProc.input = new GameInput();
  84         } catch (Exception e) {
  85             Gdx.app.error("GameSaver", e.getMessage(), e);
  86             Gdx.app.exit();
  87         }
  88         return gameProc;
  89     }
  90
  91     public static void save(GameProc gp) {
  92         FileHandle file = Gdx.files.absolute(CaveGame.GAME_FOLDER + "/saves/");
  93         file.mkdirs();
  94         file = Gdx.files.absolute(CaveGame.GAME_FOLDER + "/saves/game.sav");
  95         try {
  96             ObjectOutputStream out = new ObjectOutputStream(file.write(false));
  97             out.writeInt(VERSION);
  98             out.writeObject(gp);
  99             out.close();
 100             saveMap(Gdx.files.absolute(CaveGame.GAME_FOLDER + "/saves/foremap.sav"), gp.world.getFullForeMap());
 101             saveMap(Gdx.files.absolute(CaveGame.GAME_FOLDER + "/saves/backmap.sav"), gp.world.getFullBackMap());
 102         } catch (Exception e) {
 103             e.printStackTrace();
 104         }
 105     }
 106
 107     public static boolean exists() {
 108         return (Gdx.files.absolute(CaveGame.GAME_FOLDER + "/saves/game.sav").exists() &&
 109                 Gdx.files.absolute(CaveGame.GAME_FOLDER + "/saves/foremap.sav").exists() &&
 110                 Gdx.files.absolute(CaveGame.GAME_FOLDER + "/saves/backmap.sav").exists());
 111     }
 112
 113 }