src/de/steamwar/lobby/LobbySystem.java

@@ -19,11 +19,12 @@
 
 package de.steamwar.lobby;
 
-import de.steamwar.lobby.command.ModifyCommand;
 import de.steamwar.lobby.command.FlyCommand;
 import de.steamwar.lobby.command.HologramCommand;
+import de.steamwar.lobby.command.ModifyCommand;
 import de.steamwar.lobby.command.PortalCommand;
 import de.steamwar.lobby.listener.*;
+import de.steamwar.lobby.map.CustomMapCommand;
 import de.steamwar.lobby.team.TeamPlayer;
 import de.steamwar.message.Message;
 import org.bukkit.plugin.java.JavaPlugin;
@@ -50,6 +51,7 @@ public class LobbySystem extends JavaPlugin {
         new HologramCommand();
         new FlyCommand();
         new ModifyCommand();
+        new CustomMapCommand();
 
         config = new Config(getConfig());
         new PlayerSpawn();
@@ -66,7 +68,6 @@ public class LobbySystem extends JavaPlugin {
         new AlphaWall(l -> l.getX() < 2977, AlphaWall.REFLECT_X);
         new AlphaWall(l -> l.getZ() > 892, AlphaWall.REFLECT_Z);
         new AlphaWall(l -> l.getZ() < 1794, AlphaWall.REFLECT_Z);
-
     }
 
     @Override

src/de/steamwar/lobby/listener/WorldInteraction.java

@@ -22,20 +22,41 @@ package de.steamwar.lobby.listener;
 import de.steamwar.lobby.command.ModifyCommand;
 import org.bukkit.Material;
 import org.bukkit.entity.HumanEntity;
+import org.bukkit.entity.ItemFrame;
 import org.bukkit.entity.Player;
 import org.bukkit.event.EventHandler;
 import org.bukkit.event.block.Action;
 import org.bukkit.event.block.BlockBreakEvent;
 import org.bukkit.event.block.BlockPhysicsEvent;
 import org.bukkit.event.block.BlockPlaceEvent;
+import org.bukkit.event.entity.EntityDamageByEntityEvent;
 import org.bukkit.event.entity.EntityDamageEvent;
 import org.bukkit.event.entity.FoodLevelChangeEvent;
 import org.bukkit.event.hanging.HangingBreakByEntityEvent;
+import org.bukkit.event.hanging.HangingBreakEvent;
 import org.bukkit.event.player.PlayerInteractEvent;
+import org.bukkit.event.server.MapInitializeEvent;
 import org.bukkit.util.Vector;
 
 public class WorldInteraction extends BasicListener {
 
+    @EventHandler
+    public void onEntityDamageByEntity(EntityDamageByEntityEvent event) {
+        if (!(event.getDamager() instanceof Player)) {
+            return;
+        }
+        if(!ModifyCommand.modifying((Player) event.getDamager())) {
+            event.setCancelled(true);
+            return;
+        }
+        if (!(event.getEntity() instanceof ItemFrame)) {
+            return;
+        }
+        ItemFrame itemFrame = (ItemFrame) event.getEntity();
+        ((Player) event.getDamager()).getInventory().addItem(itemFrame.getItem());
+        itemFrame.setItem(null);
+    }
+
     @EventHandler
     public void handleEntityDamage(EntityDamageEvent event) {
         event.setCancelled(true);

src/de/steamwar/lobby/map/CustomMap.java

@@ -0,0 +1,110 @@
+/*
+ * This file is a part of the SteamWar software.
+ *
+ * Copyright (C) 2022  SteamWar.de-Serverteam
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU Affero General Public License for more details.
+ *
+ * You should have received a copy of the GNU Affero General Public License
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+
+package de.steamwar.lobby.map;
+
+import net.minecraft.server.v1_15_R1.WorldMap;
+import org.bukkit.Bukkit;
+import org.bukkit.Material;
+import org.bukkit.craftbukkit.v1_15_R1.map.CraftMapView;
+import org.bukkit.entity.Player;
+import org.bukkit.inventory.ItemStack;
+import org.bukkit.inventory.meta.MapMeta;
+import org.bukkit.map.MapPalette;
+
+import java.awt.*;
+import java.awt.image.BufferedImage;
+import java.lang.reflect.Field;
+
+public class CustomMap {
+
+    public CustomMap(Player player, BufferedImage image) {
+        if (image.getWidth() % 128 != 0) {
+            throw new IllegalArgumentException("Image width must be a multiple of 128");
+        }
+        if (image.getHeight() % 128 != 0) {
+            throw new IllegalArgumentException("Image height must be a multiple of 128");
+        }
+
+        BufferedImage bufferedImage = new BufferedImage(image.getWidth(), image.getHeight(), BufferedImage.TYPE_INT_RGB);
+        for (int y = 0; y < image.getHeight(); y++) {
+            for (int x = 0; x < image.getWidth(); x++) {
+                Color oldPixel = new Color(image.getRGB(x, y));
+                Color newPixel = getNearest(oldPixel);
+                bufferedImage.setRGB(x, y, newPixel.getRGB());
+                int quantErrorRed = oldPixel.getRed() - newPixel.getRed();
+                int quantErrorGreen = oldPixel.getGreen() - newPixel.getGreen();
+                int quantErrorBlue = oldPixel.getBlue() - newPixel.getBlue();
+                if (x < image.getWidth() - 1) {
+                    image.setRGB(x + 1, y, updateViaQuantError(new Color(image.getRGB(x + 1, y)), quantErrorRed, quantErrorGreen, quantErrorBlue, 7 / 16.0).getRGB());
+                }
+                if (x > 0) {
+                    image.setRGB(x - 1, y, updateViaQuantError(new Color(image.getRGB(x - 1, y)), quantErrorRed, quantErrorGreen, quantErrorBlue, 3 / 16.0).getRGB());
+                }
+                if (y < image.getHeight() - 1) {
+                    image.setRGB(x, y + 1, updateViaQuantError(new Color(image.getRGB(x, y + 1)), quantErrorRed, quantErrorGreen, quantErrorBlue, 5 / 16.0).getRGB());
+                    if (x < image.getWidth() - 1) {
+                        image.setRGB(x + 1, y + 1, updateViaQuantError(new Color(image.getRGB(x + 1, y + 1)), quantErrorRed, quantErrorGreen, quantErrorBlue, 1 / 16.0).getRGB());
+                    }
+                }
+            }
+        }
+
+        for (int x = 0; x < bufferedImage.getWidth(); x += 128) {
+            for (int y = 0; y < bufferedImage.getHeight(); y += 128) {
+                BufferedImage subImage = bufferedImage.getSubimage(x, y, 128, 128);
+                CraftMapView craftMapView = (CraftMapView) Bukkit.createMap(player.getWorld());
+                try {
+                    Field field = CraftMapView.class.getDeclaredField("worldMap");
+                    field.setAccessible(true);
+                    WorldMap worldMap = (WorldMap) field.get(craftMapView);
+                    for (int sx = 0; sx < 128; sx++) {
+                        for (int sy = 0; sy < 128; sy++) {
+                            byte color = MapPalette.matchColor(new Color(subImage.getRGB(sx, sy)));
+                            worldMap.colors[sx + sy * 128] = color;
+                        }
+                    }
+                    craftMapView.setLocked(true);
+                } catch (IllegalAccessException | NoSuchFieldException e) {
+                    throw new SecurityException(e.getMessage(), e);
+                }
+                ItemStack itemStack = new ItemStack(Material.FILLED_MAP, 1);
+                MapMeta mapMeta = (MapMeta) itemStack.getItemMeta();
+                mapMeta.setMapView(craftMapView);
+                itemStack.setItemMeta(mapMeta);
+                player.getInventory().addItem(itemStack);
+            }
+        }
+    }
+
+    private Color updateViaQuantError(Color color, int quantErrorRed, int quantErrorGreen, int quantErrorBlue, double multiplier) {
+        int newRed = (int) (color.getRed() + quantErrorRed * multiplier);
+        int newGreen = (int) (color.getGreen() + quantErrorGreen * multiplier);
+        int newBlue = (int) (color.getBlue() + quantErrorBlue * multiplier);
+        return new Color(clamp(newRed), clamp(newGreen), clamp(newBlue));
+    }
+
+    private int clamp(int value) {
+        return Math.max(0, Math.min(255, value));
+    }
+
+    private static Color getNearest(Color color) {
+        return MapPalette.getColor(MapPalette.matchColor(color));
+    }
+}

src/de/steamwar/lobby/map/CustomMapCommand.java

@@ -0,0 +1,80 @@
+/*
+ * This file is a part of the SteamWar software.
+ *
+ * Copyright (C) 2022  SteamWar.de-Serverteam
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU Affero General Public License for more details.
+ *
+ * You should have received a copy of the GNU Affero General Public License
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+
+package de.steamwar.lobby.map;
+
+import de.steamwar.command.GuardChecker;
+import de.steamwar.command.GuardResult;
+import de.steamwar.command.SWCommand;
+import de.steamwar.command.TypeMapper;
+import de.steamwar.sql.SteamwarUser;
+import de.steamwar.sql.UserGroup;
+import lombok.SneakyThrows;
+import org.bukkit.command.CommandSender;
+import org.bukkit.entity.Player;
+
+import javax.imageio.ImageIO;
+import java.io.File;
+import java.util.List;
+
+public class CustomMapCommand extends SWCommand {
+
+    public CustomMapCommand() {
+        super("map");
+    }
+
+    @Register
+    @SneakyThrows
+    public void render(@Guard Player p, File file) {
+        if (SteamwarUser.get(p).getUserGroup() != UserGroup.Developer) {
+            return;
+        }
+        if (!file.exists()) {
+            p.sendMessage("§cDiese Datei existiert nicht!");
+            return;
+        }
+        new CustomMap(p, ImageIO.read(file));
+    }
+
+    @ClassGuard(value = Player.class, local = true)
+    public GuardChecker getGuardChecker() {
+        return (commandSender, guardCheckType, strings, s) -> {
+            Player player = (Player) commandSender;
+            if (SteamwarUser.get(player).getUserGroup() == UserGroup.Developer) {
+                return GuardResult.ALLOWED;
+            }
+            return GuardResult.DENIED;
+        };
+    }
+
+    @ClassMapper(value = File.class, local = true)
+    public TypeMapper<File> getTypeMapper() {
+        return new TypeMapper<File>() {
+            @Override
+            public List<String> tabCompletes(CommandSender commandSender, String[] strings, String s) {
+                return null;
+            }
+
+            @Override
+            public File map(CommandSender commandSender, String[] previousArguments, String s) {
+                return new File(s);
+            }
+        };
+    }
+}