1 files changed, 137 insertions, 0 deletions
diff --git a/patches/server/0686-Expose-vanilla-BiomeProvider-from-WorldInfo.patch b/patches/server/0686-Expose-vanilla-BiomeProvider-from-WorldInfo.patch
new file mode 100644
index 0000000000..2d40d8b668
--- /dev/null
+++ b/patches/server/0686-Expose-vanilla-BiomeProvider-from-WorldInfo.patch
@@ -0,0 +1,137 @@
+From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
+From: Jason Penilla <[email protected]>
+Date: Thu, 6 Jan 2022 15:59:06 -0800
+Subject: [PATCH] Expose vanilla BiomeProvider from WorldInfo
+
+
+diff --git a/src/main/java/net/minecraft/server/MinecraftServer.java b/src/main/java/net/minecraft/server/MinecraftServer.java
+index 7ee46b9f98794d1fec0a8feea71fd495f9199dd0..d19f2ca702ffa32c616ec821219079e2b784a460 100644
+--- a/src/main/java/net/minecraft/server/MinecraftServer.java
++++ b/src/main/java/net/minecraft/server/MinecraftServer.java
+@@ -597,7 +597,7 @@ public abstract class MinecraftServer extends ReentrantBlockableEventLoop<TickTa
+             List<CustomSpawner> list = ImmutableList.of(new PhantomSpawner(), new PatrolSpawner(), new CatSpawner(), new VillageSiege(), new WanderingTraderSpawner(iworlddataserver));
+             LevelStem worlddimension = (LevelStem) dimensions.get(dimensionKey);
+ 
+-            org.bukkit.generator.WorldInfo worldInfo = new org.bukkit.craftbukkit.generator.CraftWorldInfo(iworlddataserver, worldSession, org.bukkit.World.Environment.getEnvironment(dimension), worlddimension.type().value());
++            org.bukkit.generator.WorldInfo worldInfo = new org.bukkit.craftbukkit.generator.CraftWorldInfo(iworlddataserver, worldSession, org.bukkit.World.Environment.getEnvironment(dimension), worlddimension.type().value(), worlddimension.generator(), this.registryAccess()); // Paper - Expose vanilla BiomeProvider from WorldInfo
+             if (biomeProvider == null && gen != null) {
+                 biomeProvider = gen.getDefaultBiomeProvider(worldInfo);
+             }
+diff --git a/src/main/java/org/bukkit/craftbukkit/CraftServer.java b/src/main/java/org/bukkit/craftbukkit/CraftServer.java
+index c366992f3e48f9a3a69ba48491d678ba73e81d61..b3e1f987d31ef5a8f90bc366e248de86e93b9634 100644
+--- a/src/main/java/org/bukkit/craftbukkit/CraftServer.java
++++ b/src/main/java/org/bukkit/craftbukkit/CraftServer.java
+@@ -1272,7 +1272,7 @@ public final class CraftServer implements Server {
+         List<CustomSpawner> list = ImmutableList.of(new PhantomSpawner(), new PatrolSpawner(), new CatSpawner(), new VillageSiege(), new WanderingTraderSpawner(worlddata));
+         LevelStem worlddimension = iregistry.get(actualDimension);
+ 
+-        WorldInfo worldInfo = new CraftWorldInfo(worlddata, worldSession, creator.environment(), worlddimension.type().value());
++        WorldInfo worldInfo = new CraftWorldInfo(worlddata, worldSession, creator.environment(), worlddimension.type().value(), worlddimension.generator(), this.getHandle().getServer().registryAccess()); // Paper - Expose vanilla BiomeProvider from WorldInfo
+         if (biomeProvider == null && generator != null) {
+             biomeProvider = generator.getDefaultBiomeProvider(worldInfo);
+         }
+diff --git a/src/main/java/org/bukkit/craftbukkit/CraftWorld.java b/src/main/java/org/bukkit/craftbukkit/CraftWorld.java
+index df74b47477553bdee0b5faaf40835b94c41316dd..c787fbcef295f2108a6f843524c00cdea4660f27 100644
+--- a/src/main/java/org/bukkit/craftbukkit/CraftWorld.java
++++ b/src/main/java/org/bukkit/craftbukkit/CraftWorld.java
+@@ -211,6 +211,29 @@ public class CraftWorld extends CraftRegionAccessor implements World {
+     public int getPlayerCount() {
+         return world.players().size();
+     }
++
++    @Override
++    public BiomeProvider vanillaBiomeProvider() {
++        net.minecraft.server.level.ServerChunkCache serverCache = this.getHandle().chunkSource;
++
++        final net.minecraft.world.level.biome.BiomeSource biomeSource = serverCache.getGenerator().getBiomeSource();
++        final net.minecraft.world.level.biome.Climate.Sampler sampler = serverCache.randomState().sampler();
++
++        final List<Biome> possibleBiomes = biomeSource.possibleBiomes().stream()
++            .map(biome -> org.bukkit.craftbukkit.block.CraftBiome.minecraftHolderToBukkit(biome))
++            .toList();
++        return new BiomeProvider() {
++            @Override
++            public Biome getBiome(final org.bukkit.generator.WorldInfo worldInfo, final int x, final int y, final int z) {
++                return org.bukkit.craftbukkit.block.CraftBiome.minecraftHolderToBukkit(biomeSource.getNoiseBiome(x >> 2, y >> 2, z >> 2, sampler));
++            }
++
++            @Override
++            public List<Biome> getBiomes(final org.bukkit.generator.WorldInfo worldInfo) {
++                return possibleBiomes;
++            }
++        };
++    }
+     // Paper end
+ 
+     private static final Random rand = new Random();
+diff --git a/src/main/java/org/bukkit/craftbukkit/generator/CraftWorldInfo.java b/src/main/java/org/bukkit/craftbukkit/generator/CraftWorldInfo.java
+index 5d655d6cd3e23e0287069f8bdf77601487e862fd..cf57c6e9ce63f7b1d95d91ead2453409a31a5c52 100644
+--- a/src/main/java/org/bukkit/craftbukkit/generator/CraftWorldInfo.java
++++ b/src/main/java/org/bukkit/craftbukkit/generator/CraftWorldInfo.java
+@@ -17,8 +17,14 @@ public class CraftWorldInfo implements WorldInfo {
+     private final long seed;
+     private final int minHeight;
+     private final int maxHeight;
++    // Paper start
++    private final net.minecraft.world.level.chunk.ChunkGenerator vanillaChunkGenerator;
++    private final net.minecraft.core.RegistryAccess.Frozen registryAccess;
+ 
+-    public CraftWorldInfo(ServerLevelData worldDataServer, LevelStorageSource.LevelStorageAccess session, World.Environment environment, DimensionType dimensionManager) {
++    public CraftWorldInfo(ServerLevelData worldDataServer, LevelStorageSource.LevelStorageAccess session, World.Environment environment, DimensionType dimensionManager, net.minecraft.world.level.chunk.ChunkGenerator chunkGenerator, net.minecraft.core.RegistryAccess.Frozen registryAccess) {
++        this.registryAccess = registryAccess;
++        this.vanillaChunkGenerator = chunkGenerator;
++        // Paper end
+         this.name = worldDataServer.getLevelName();
+         this.uuid = WorldUUID.getUUID(session.levelDirectory.path().toFile());
+         this.environment = environment;
+@@ -27,15 +33,6 @@ public class CraftWorldInfo implements WorldInfo {
+         this.maxHeight = dimensionManager.minY() + dimensionManager.height();
+     }
+ 
+-    public CraftWorldInfo(String name, UUID uuid, World.Environment environment, long seed, int minHeight, int maxHeight) {
+-        this.name = name;
+-        this.uuid = uuid;
+-        this.environment = environment;
+-        this.seed = seed;
+-        this.minHeight = minHeight;
+-        this.maxHeight = maxHeight;
+-    }
+-
+     @Override
+     public String getName() {
+         return this.name;
+@@ -65,4 +62,34 @@ public class CraftWorldInfo implements WorldInfo {
+     public int getMaxHeight() {
+         return this.maxHeight;
+     }
++
++    // Paper start
++    @Override
++    public org.bukkit.generator.BiomeProvider vanillaBiomeProvider() {
++        final net.minecraft.world.level.levelgen.RandomState randomState;
++        if (vanillaChunkGenerator instanceof net.minecraft.world.level.levelgen.NoiseBasedChunkGenerator noiseBasedChunkGenerator) {
++            randomState = net.minecraft.world.level.levelgen.RandomState.create(noiseBasedChunkGenerator.generatorSettings().value(),
++                registryAccess.lookupOrThrow(net.minecraft.core.registries.Registries.NOISE), getSeed());
++        } else {
++            randomState = net.minecraft.world.level.levelgen.RandomState.create(net.minecraft.world.level.levelgen.NoiseGeneratorSettings.dummy(),
++                registryAccess.lookupOrThrow(net.minecraft.core.registries.Registries.NOISE), getSeed());
++        }
++
++        final java.util.List<org.bukkit.block.Biome> possibleBiomes = CraftWorldInfo.this.vanillaChunkGenerator.getBiomeSource().possibleBiomes().stream()
++            .map(biome -> org.bukkit.craftbukkit.block.CraftBiome.minecraftHolderToBukkit(biome))
++            .toList();
++        return new org.bukkit.generator.BiomeProvider() {
++            @Override
++            public org.bukkit.block.Biome getBiome(final WorldInfo worldInfo, final int x, final int y, final int z) {
++                return org.bukkit.craftbukkit.block.CraftBiome.minecraftHolderToBukkit(
++                    CraftWorldInfo.this.vanillaChunkGenerator.getBiomeSource().getNoiseBiome(x >> 2, y >> 2, z >> 2, randomState.sampler()));
++            }
++
++            @Override
++            public java.util.List<org.bukkit.block.Biome> getBiomes(final org.bukkit.generator.WorldInfo worldInfo) {
++                return possibleBiomes;
++            }
++        };
++    }
++    // Paper end
+ }