papermc/CraftBukkit-Patches/0019-Add-oreobfuscator-for-Spigot.patch

From 7d1bdfd3999b89c9d6e2d0aae359942a1686f3f7 Mon Sep 17 00:00:00 2001
From: lishid <lishid@gmail.com>
Date: Mon, 21 Jan 2013 16:59:04 +1100
Subject: [PATCH] Add oreobfuscator for Spigot.

---
 src/main/java/net/minecraft/server/Explosion.java  |  1 +
 .../net/minecraft/server/Packet51MapChunk.java     |  1 +
 .../net/minecraft/server/Packet56MapChunkBulk.java | 21 ++++-
 .../minecraft/server/PlayerInteractManager.java    |  5 ++
 .../java/org/bukkit/craftbukkit/CraftServer.java   |  5 ++
 .../java/org/bukkit/craftbukkit/CraftWorld.java    |  4 +
 .../bukkit/craftbukkit/OrebfuscatorManager.java    | 95 ++++++++++++++++++++++
 src/main/java/org/bukkit/craftbukkit/Spigot.java   |  4 +
 src/main/resources/configurations/bukkit.yml       |  5 ++
 9 files changed, 140 insertions(+), 1 deletion(-)
 create mode 100644 src/main/java/org/bukkit/craftbukkit/OrebfuscatorManager.java

diff --git a/src/main/java/net/minecraft/server/Explosion.java b/src/main/java/net/minecraft/server/Explosion.java
index ba2f88f..8d5b1d8 100644
--- a/src/main/java/net/minecraft/server/Explosion.java
+++ b/src/main/java/net/minecraft/server/Explosion.java
@@ -240,6 +240,7 @@ public class Explosion {
                 j = chunkposition.y;
                 k = chunkposition.z;
                 l = this.world.getTypeId(i, j, k);
+                org.bukkit.craftbukkit.OrebfuscatorManager.updateNearbyBlocks(world, i, j, k); // Spigot (Orebfuscator)
                 if (flag) {
                     double d0 = (double) ((float) i + this.world.random.nextFloat());
                     double d1 = (double) ((float) j + this.world.random.nextFloat());
diff --git a/src/main/java/net/minecraft/server/Packet51MapChunk.java b/src/main/java/net/minecraft/server/Packet51MapChunk.java
index b51d90c..365116a 100644
--- a/src/main/java/net/minecraft/server/Packet51MapChunk.java
+++ b/src/main/java/net/minecraft/server/Packet51MapChunk.java
@@ -46,6 +46,7 @@ public class Packet51MapChunk extends Packet {
 
         this.d = chunkmap.c;
         this.c = chunkmap.b;
+        org.bukkit.craftbukkit.OrebfuscatorManager.obfuscate(chunk.x, chunk.z, i, chunkmap.a, chunk.world); // Spigot (Orebfuscator)
 
         try {
             this.inflatedBuffer = chunkmap.a;
diff --git a/src/main/java/net/minecraft/server/Packet56MapChunkBulk.java b/src/main/java/net/minecraft/server/Packet56MapChunkBulk.java
index 867ebd3..9d5cee7 100644
--- a/src/main/java/net/minecraft/server/Packet56MapChunkBulk.java
+++ b/src/main/java/net/minecraft/server/Packet56MapChunkBulk.java
@@ -28,6 +28,7 @@ public class Packet56MapChunkBulk extends Packet {
         }
     };
     // CraftBukkit end
+    private World world; // Spigot (Orebfuscator) Keep track of world
 
     public Packet56MapChunkBulk() {}
 
@@ -46,6 +47,9 @@ public class Packet56MapChunkBulk extends Packet {
             Chunk chunk = (Chunk) list.get(k);
             ChunkMap chunkmap = Packet51MapChunk.a(chunk, true, '\uffff');
 
+            world = chunk.world; // Spigot (Orebfuscator)
+            /* Spigot (Orebfuscator) - Don't use the build buffer yet. Copy to it more efficiently once the chunk is obfuscated
+            // Moved to compress()
             if (buildBuffer.length < j + chunkmap.a.length) {
                 byte[] abyte = new byte[j + chunkmap.a.length];
 
@@ -53,7 +57,7 @@ public class Packet56MapChunkBulk extends Packet {
                 buildBuffer = abyte;
             }
 
-            System.arraycopy(chunkmap.a, 0, buildBuffer, j, chunkmap.a.length);
+            System.arraycopy(chunkmap.a, 0, buildBuffer, j, chunkmap.a.length); */
             j += chunkmap.a.length;
             this.c[k] = chunk.x;
             this.d[k] = chunk.z;
@@ -82,6 +86,21 @@ public class Packet56MapChunkBulk extends Packet {
             return;
         }
 
+        // Spigot (Orebfuscator) start - Obfuscate chunks
+        int finalBufferSize = 0;
+        for (int i = 0; i < a.length; i++) {
+            org.bukkit.craftbukkit.OrebfuscatorManager.obfuscate(c[i], d[i], a[i], inflatedBuffers[i], world);
+            finalBufferSize += inflatedBuffers[i].length;
+        }
+
+        // Now it's time to efficiently copy the chunk to the build buffer
+        buildBuffer = new byte[finalBufferSize];
+        int bufferLocation = 0;
+        for (int i = 0; i < a.length; i++) {
+            System.arraycopy(inflatedBuffers[i], 0, buildBuffer, bufferLocation, inflatedBuffers[i].length);
+            bufferLocation += inflatedBuffers[i].length;
+        }
+        // Spigot (Orebfuscator) end
         Deflater deflater = localDeflater.get();
         deflater.reset();
         deflater.setInput(this.buildBuffer);
diff --git a/src/main/java/net/minecraft/server/PlayerInteractManager.java b/src/main/java/net/minecraft/server/PlayerInteractManager.java
index 5faee12..55f9ffa 100644
--- a/src/main/java/net/minecraft/server/PlayerInteractManager.java
+++ b/src/main/java/net/minecraft/server/PlayerInteractManager.java
@@ -291,6 +291,11 @@ public class PlayerInteractManager {
                 }
                 return false;
             }
+            // Spigot (Orebfuscator) start
+            else {
+                org.bukkit.craftbukkit.OrebfuscatorManager.updateNearbyBlocks(world, i, j, k);
+            }
+            // Spigot (Orebfuscator) end
         }
 
         if (false) { // Never trigger
diff --git a/src/main/java/org/bukkit/craftbukkit/CraftServer.java b/src/main/java/org/bukkit/craftbukkit/CraftServer.java
index a7785b7..ef52f32 100644
--- a/src/main/java/org/bukkit/craftbukkit/CraftServer.java
+++ b/src/main/java/org/bukkit/craftbukkit/CraftServer.java
@@ -163,6 +163,11 @@ public final class CraftServer implements Server {
     private WarningState warningState = WarningState.DEFAULT;
     private final BooleanWrapper online = new BooleanWrapper();
 
+    // Orebfuscator use
+    public boolean orebfuscatorEnabled = false;
+    public int orebfuscatorUpdateRadius = 2;
+    public List<String> orebfuscatorDisabledWorlds;
+
     private final class BooleanWrapper {
         private boolean value = true;
     }
diff --git a/src/main/java/org/bukkit/craftbukkit/CraftWorld.java b/src/main/java/org/bukkit/craftbukkit/CraftWorld.java
index 94e07fe..21bd64a 100644
--- a/src/main/java/org/bukkit/craftbukkit/CraftWorld.java
+++ b/src/main/java/org/bukkit/craftbukkit/CraftWorld.java
@@ -119,6 +119,8 @@ public class CraftWorld implements World {
         viewDistance = Bukkit.getServer().getViewDistance();
         viewDistance = configuration.getInt("world-settings." + name + ".view-distance", viewDistance);
 
+        obfuscated = !world.getServer().orebfuscatorDisabledWorlds.contains(name);
+
         server.getLogger().info("-------------- Spigot ----------------");
         server.getLogger().info("-------- World Settings For [" + name + "] --------");
         server.getLogger().info("Growth Per Chunk: " + growthPerTick);
@@ -135,6 +137,7 @@ public class CraftWorld implements World {
         server.getLogger().info("Tree Growth Modifier: " + treeGrowthModifier);
         server.getLogger().info("Mushroom Growth Modifier: " + mushroomGrowthModifier);
         server.getLogger().info("View distance: " + viewDistance);
+        server.getLogger().info("Oreobfuscator: " + obfuscated);
         server.getLogger().info("-------------------------------------------------");
         // Spigot end
     }
@@ -146,6 +149,7 @@ public class CraftWorld implements World {
     public int mobSpawnRange = 4;
     public int aggregateTicks = 4;
     public int viewDistance;
+    public boolean obfuscated = false;
     //Crop growth rates:
     public int wheatGrowthModifier = 100;
     public int cactusGrowthModifier = 100;
diff --git a/src/main/java/org/bukkit/craftbukkit/OrebfuscatorManager.java b/src/main/java/org/bukkit/craftbukkit/OrebfuscatorManager.java
new file mode 100644
index 0000000..7178dfb
--- /dev/null
+++ b/src/main/java/org/bukkit/craftbukkit/OrebfuscatorManager.java
@@ -0,0 +1,95 @@
+package org.bukkit.craftbukkit;
+
+import net.minecraft.server.Block;
+import net.minecraft.server.World;
+
+public class OrebfuscatorManager {
+
+    // Used to keep track of which blocks to obfuscate
+    private static boolean[] obfuscateBlocks = new boolean[Short.MAX_VALUE];
+
+    // Default blocks
+    static {
+        obfuscateBlocks[Block.STONE.id] = true;
+        obfuscateBlocks[Block.GOLD_ORE.id] = true;
+        obfuscateBlocks[Block.IRON_ORE.id] = true;
+        obfuscateBlocks[Block.COAL_ORE.id] = true;
+        obfuscateBlocks[Block.LAPIS_ORE.id] = true;
+        obfuscateBlocks[Block.CHEST.id] = true;
+        obfuscateBlocks[Block.DIAMOND_ORE.id] = true;
+        obfuscateBlocks[Block.REDSTONE_ORE.id] = true;
+        obfuscateBlocks[Block.GLOWING_REDSTONE_ORE.id] = true;
+        obfuscateBlocks[Block.EMERALD_ORE.id] = true;
+        obfuscateBlocks[Block.ENDER_CHEST.id] = true;
+    }
+
+    public static void updateNearbyBlocks(World world, int x, int y, int z) {
+        updateNearbyBlocks(world, x, y, z, world.getServer().orebfuscatorUpdateRadius);
+    }
+
+    public static void obfuscate(int chunkX, int chunkY, int bitmask, byte[] buffer, World world) {
+        if (world.getServer().orebfuscatorEnabled && world.getWorld().obfuscated) {
+            int initialRadius = 1;
+            int index = 0;
+            int startX = chunkX << 4;
+            int startZ = chunkY << 4;
+            for (int i = 0; i < 16; i++) {
+                // If the bitmask indicates this chunk is sent...
+                if ((bitmask & 1 << i) != 0) {
+                    for (int y = 0; y < 16; y++) {
+                        for (int z = 0; z < 16; z++) {
+                            for (int x = 0; x < 16; x++) {
+                                byte data = buffer[index];
+                                // Check if the block should be obfuscated for the default engine modes
+                                if (obfuscateBlocks[data & 0xFF]) {
+                                    if (initialRadius == 0 || !areAjacentBlocksTransparent(world, startX + x, (i << 4) + y, startZ + z, initialRadius)) {
+                                        // Replace with stone
+                                        buffer[index] = (byte) Block.STONE.id;
+                                    }
+                                }
+                                if (++index >= buffer.length) {
+                                    return;
+                                }
+                            }
+                        }
+                    }
+                }
+            }
+        }
+    }
+
+    private static void updateNearbyBlocks(World world, int x, int y, int z, int radius) {
+        if (world.getServer().orebfuscatorEnabled && world.getWorld().obfuscated && world.isLoaded(x, y, z)) {
+            // Get block id
+            int id = world.getTypeId(x, y, z);
+
+            // See if it needs update
+            if (obfuscateBlocks[id]) {
+                // Send the update
+                world.notify(x, y, z);
+            }
+
+            // Check other blocks for updates
+            if (radius != 0) {
+                updateNearbyBlocks(world, x + 1, y, z, radius - 1);
+                updateNearbyBlocks(world, x - 1, y, z, radius - 1);
+                updateNearbyBlocks(world, x, y + 1, z, radius - 1);
+                updateNearbyBlocks(world, x, y - 1, z, radius - 1);
+                updateNearbyBlocks(world, x, y, z + 1, radius - 1);
+                updateNearbyBlocks(world, x, y, z - 1, radius - 1);
+            }
+        }
+    }
+
+    private static boolean areAjacentBlocksTransparent(World world, int x, int y, int z, int radius) {
+        return y > 0 && y <= world.getHeight()
+                && world.isLoaded(x, y, z)
+                && !Block.i(world.getTypeId(x, y, z))
+                || (radius > 0 && (areAjacentBlocksTransparent(world, x, y + 1, z, radius - 1)
+                || areAjacentBlocksTransparent(world, x, y - 1, z, radius - 1)
+                || areAjacentBlocksTransparent(world, x + 1, y, z, radius - 1)
+                || areAjacentBlocksTransparent(world, x - 1, y, z, radius - 1)
+                || areAjacentBlocksTransparent(world, x, y, z + 1, radius - 1)
+                || areAjacentBlocksTransparent(world, x, y, z - 1, radius - 1)));
+    }
+}
diff --git a/src/main/java/org/bukkit/craftbukkit/Spigot.java b/src/main/java/org/bukkit/craftbukkit/Spigot.java
index 30bc542..ccb1cc7 100644
--- a/src/main/java/org/bukkit/craftbukkit/Spigot.java
+++ b/src/main/java/org/bukkit/craftbukkit/Spigot.java
@@ -23,6 +23,10 @@ public class Spigot {
         server.commandComplete = configuration.getBoolean("settings.command-complete", true);
         server.spamGuardExclusions = configuration.getStringList("settings.spam-exclusions");
 
+        server.orebfuscatorEnabled = configuration.getBoolean("orebfuscator.enable", false);
+        server.orebfuscatorUpdateRadius = configuration.getInt("orebfuscator.update-radius", 2);
+        server.orebfuscatorDisabledWorlds = configuration.getStringList("orebfuscator.disabled-worlds");
+
         if (server.chunkGCPeriod == 0) {
             server.getLogger().severe("[Spigot] You should not disable chunk-gc. Resetting period-in-ticks to 600 ticks.");
             server.chunkGCPeriod = 600;
diff --git a/src/main/resources/configurations/bukkit.yml b/src/main/resources/configurations/bukkit.yml
index 9d6d613..6931712 100644
--- a/src/main/resources/configurations/bukkit.yml
+++ b/src/main/resources/configurations/bukkit.yml
@@ -84,3 +84,8 @@ database:
     driver: org.sqlite.JDBC
     password: walrus
     url: jdbc:sqlite:{DIR}{NAME}.db
+orebfuscator:
+    enable: false
+    update-radius: 2
+    disabled-worlds:
+       - world_the_end
-- 
1.8.1-rc2