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 org.jetbrains.annotations.NotNull;
   6 import ru.deadsoftware.cavedroid.CaveGame;
   7
   8 import java.io.*;
   9 import java.nio.ByteBuffer;
  10
  11 public class GameSaver {
  12
  13     private static final int VERSION = 0;
  14
  15     @NotNull
  16     private static byte[] intToBytes(int i) {
  17         return ByteBuffer.allocate(4).putInt(i).array();
  18     }
  19
  20     private static void saveMap(@NotNull FileHandle file, @NotNull int[][] map) throws IOException {
  21         int rl, bl;
  22         int width = map.length;
  23         int height = map[0].length;
  24         BufferedOutputStream out = new BufferedOutputStream(file.write(false));
  25         out.write(intToBytes(VERSION));
  26         out.write(intToBytes(width));
  27         out.write(intToBytes(height));
  28         for (int y = 0; y < height; y++) {
  29             bl = map[0][y];
  30             rl = 0;
  31             for (int[] ints : map) {
  32                 if (ints[y] != bl) {
  33                     out.write(intToBytes(rl));
  34                     out.write(intToBytes(bl));
  35                     rl = 0;
  36                     bl = ints[y];
  37                 }
  38                 rl++;
  39             }
  40             out.write(intToBytes(rl));
  41             out.write(intToBytes(bl));
  42         }
  43         out.flush();
  44         out.close();
  45     }
  46
  47     @NotNull
  48     private static int[][] loadMap(@NotNull FileHandle file) throws Exception {
  49         int[][] map;
  50         int ver, width, height;
  51         int rl, bl;
  52         DataInputStream in = new DataInputStream(file.read());
  53         ver = in.readInt();
  54         if (VERSION == ver) {
  55             width = in.readInt();
  56             height = in.readInt();
  57             map = new int[width][height];
  58             for (int y = 0; y < height; y++) {
  59                 for (int x = 0; x < width; x += rl) {
  60                     rl = in.readInt();
  61                     bl = in.readInt();
  62                     for (int i = x; i < x + rl; i++) map[i][y] = bl;
  63                 }
  64             }
  65             in.close();
  66         } else throw new Exception("version mismatch");
  67         return map;
  68     }
  69
  70     public static GameProc load() {
  71         FileHandle file = Gdx.files.absolute(CaveGame.GAME_FOLDER + "/saves/game.sav");
  72         GameProc gameProc = null;
  73         try {
  74             ObjectInputStream in = new ObjectInputStream(file.read());
  75             int ver = in.readInt();
  76             if (VERSION == ver) gameProc = (GameProc) in.readObject();
  77             else throw new Exception("version mismatch");
  78             in.close();
  79             gameProc.world = new GameWorld(
  80                     loadMap(Gdx.files.absolute(CaveGame.GAME_FOLDER + "/saves/foremap.sav")),
  81                     loadMap(Gdx.files.absolute(CaveGame.GAME_FOLDER + "/saves/backmap.sav"))
  82             );
  83             gameProc.physics = new GamePhysics();
  84             gameProc.input = new GameInput();
  85         } catch (Exception e) {
  86             Gdx.app.error("GameSaver", e.getMessage(), e);
  87             Gdx.app.exit();
  88         }
  89         return gameProc;
  90     }
  91
  92     public static void save(GameProc gp) {
  93         FileHandle file = Gdx.files.absolute(CaveGame.GAME_FOLDER + "/saves/");
  94         file.mkdirs();
  95         file = Gdx.files.absolute(CaveGame.GAME_FOLDER + "/saves/game.sav");
  96         try {
  97             ObjectOutputStream out = new ObjectOutputStream(file.write(false));
  98             out.writeInt(VERSION);
  99             out.writeObject(gp);
 100             out.close();
 101             saveMap(Gdx.files.absolute(CaveGame.GAME_FOLDER + "/saves/foremap.sav"), gp.world.getFullForeMap());
 102             saveMap(Gdx.files.absolute(CaveGame.GAME_FOLDER + "/saves/backmap.sav"), gp.world.getFullBackMap());
 103         } catch (Exception e) {
 104             e.printStackTrace();
 105         }
 106     }
 107
 108     public static boolean exists() {
 109         return (Gdx.files.absolute(CaveGame.GAME_FOLDER + "/saves/game.sav").exists() &&
 110                 Gdx.files.absolute(CaveGame.GAME_FOLDER + "/saves/foremap.sav").exists() &&
 111                 Gdx.files.absolute(CaveGame.GAME_FOLDER + "/saves/backmap.sav").exists());
 112     }
 113
 114 }