1 files changed, 146 insertions, 0 deletions
diff --git a/patches/server/0824-Allow-delegation-to-vanilla-chunk-gen.patch b/patches/server/0824-Allow-delegation-to-vanilla-chunk-gen.patch
new file mode 100644
index 0000000000..b3d9977a49
--- /dev/null
+++ b/patches/server/0824-Allow-delegation-to-vanilla-chunk-gen.patch
@@ -0,0 +1,146 @@
+From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
+From: MiniDigger <[email protected]>
+Date: Wed, 29 Apr 2020 02:10:32 +0200
+Subject: [PATCH] Allow delegation to vanilla chunk gen
+
+
+diff --git a/src/main/java/org/bukkit/craftbukkit/CraftServer.java b/src/main/java/org/bukkit/craftbukkit/CraftServer.java
+index 02e25451737841001363f4697fd05b1e2c6240cd..d91abf93f2a06f73d3124f4fcff2491fe8d36655 100644
+--- a/src/main/java/org/bukkit/craftbukkit/CraftServer.java
++++ b/src/main/java/org/bukkit/craftbukkit/CraftServer.java
+@@ -2287,6 +2287,107 @@ public final class CraftServer implements Server {
+         return new OldCraftChunkData(world.getMinHeight(), world.getMaxHeight(), handle.registryAccess().registryOrThrow(Registry.BIOME_REGISTRY), world); // Paper - Anti-Xray - Add parameters
+     }
+ 
++    // Paper start
++    private static final List<net.minecraft.world.level.chunk.ChunkStatus> VANILLA_GEN_STATUSES = List.of(
++        net.minecraft.world.level.chunk.ChunkStatus.EMPTY,
++        net.minecraft.world.level.chunk.ChunkStatus.STRUCTURE_STARTS,
++        net.minecraft.world.level.chunk.ChunkStatus.STRUCTURE_REFERENCES,
++        net.minecraft.world.level.chunk.ChunkStatus.BIOMES,
++        net.minecraft.world.level.chunk.ChunkStatus.NOISE,
++        net.minecraft.world.level.chunk.ChunkStatus.SURFACE,
++        net.minecraft.world.level.chunk.ChunkStatus.CARVERS,
++        net.minecraft.world.level.chunk.ChunkStatus.LIQUID_CARVERS,
++        net.minecraft.world.level.chunk.ChunkStatus.FEATURES,
++        net.minecraft.world.level.chunk.ChunkStatus.LIGHT
++    );
++
++    @net.minecraft.MethodsReturnNonnullByDefault
++    private static final class PaperEmptyLevelChunk extends net.minecraft.world.level.chunk.EmptyLevelChunk {
++        private final net.minecraft.world.level.biome.Biome biome;
++
++        public PaperEmptyLevelChunk(net.minecraft.world.level.Level world, net.minecraft.world.level.ChunkPos pos) {
++            super(world, pos);
++            this.biome = this.level.registryAccess().registryOrThrow(Registry.BIOME_REGISTRY).getOrThrow(net.minecraft.world.level.biome.Biomes.PLAINS);
++        }
++
++        @Override
++        public net.minecraft.world.level.biome.Biome getNoiseBiome(int biomeX, int biomeY, int biomeZ) {
++            return this.biome;
++        }
++
++        @Override
++        public void markPosForPostprocessing(BlockPos pos) {}
++    }
++
++    @Override
++    @Deprecated(forRemoval = true)
++    public ChunkGenerator.ChunkData createVanillaChunkData(World world, int x, int z) {
++        // do bunch of vanilla shit
++        final net.minecraft.server.level.ServerLevel serverLevel = ((CraftWorld) world).getHandle();
++        final Registry<net.minecraft.world.level.biome.Biome> biomeRegistry = serverLevel.getServer().registryAccess().registryOrThrow(Registry.BIOME_REGISTRY);
++        final net.minecraft.world.level.chunk.ProtoChunk protoChunk = new net.minecraft.world.level.chunk.ProtoChunk(
++            new net.minecraft.world.level.ChunkPos(x, z),
++            net.minecraft.world.level.chunk.UpgradeData.EMPTY,
++            serverLevel,
++            biomeRegistry,
++            null
++        );
++
++        final net.minecraft.world.level.chunk.ChunkGenerator chunkGenerator;
++        if (serverLevel.chunkSource.getGenerator() instanceof org.bukkit.craftbukkit.generator.CustomChunkGenerator bukkit) {
++            chunkGenerator = bukkit.delegate;
++        } else {
++            chunkGenerator = serverLevel.chunkSource.getGenerator();
++        }
++
++        final net.minecraft.world.level.ChunkPos chunkPos = new net.minecraft.world.level.ChunkPos(x, z);
++        final net.minecraft.util.thread.ProcessorMailbox<Runnable> mailbox = net.minecraft.util.thread.ProcessorMailbox.create(
++            net.minecraft.Util.backgroundExecutor(),
++            "CraftServer#createVanillaChunkData(worldName='" + world.getName() + "', x='" + x + "', z='" + z + "')"
++        );
++        for (final net.minecraft.world.level.chunk.ChunkStatus chunkStatus : VANILLA_GEN_STATUSES) {
++            final List<net.minecraft.world.level.chunk.ChunkAccess> chunks = Lists.newArrayList();
++            final int statusRange = Math.max(1, chunkStatus.getRange());
++
++            for (int zz = chunkPos.z - statusRange; zz <= chunkPos.z + statusRange; ++zz) {
++                for (int xx = chunkPos.x - statusRange; xx <= chunkPos.x + statusRange; ++xx) {
++                    if (xx == chunkPos.x && zz == chunkPos.z) {
++                        chunks.add(protoChunk);
++                    } else {
++                        final net.minecraft.world.level.chunk.ChunkAccess chunk = new PaperEmptyLevelChunk(serverLevel, new net.minecraft.world.level.ChunkPos(xx, zz));
++                        chunks.add(chunk);
++                    }
++                }
++            }
++
++            chunkStatus.generate(
++                mailbox::tell,
++                serverLevel,
++                chunkGenerator,
++                serverLevel.getStructureManager(),
++                serverLevel.chunkSource.getLightEngine(),
++                chunk -> {
++                    throw new UnsupportedOperationException("Not creating full chunks here");
++                },
++                chunks,
++                true
++            ).thenAccept(either -> {
++                if (chunkStatus == net.minecraft.world.level.chunk.ChunkStatus.NOISE) {
++                    either.left().ifPresent(chunk -> net.minecraft.world.level.levelgen.Heightmap.primeHeightmaps(chunk, net.minecraft.world.level.chunk.ChunkStatus.POST_FEATURES));
++                }
++            }).join();
++        }
++
++        // get empty object
++        OldCraftChunkData data = (OldCraftChunkData) this.createChunkData(world);
++        // copy over generated sections
++        data.getLights().addAll(protoChunk.getLights().toList());
++        data.setRawChunkData(protoChunk.getSections());
++        // hooray!
++        return data;
++    }
++    // Paper end
++
+     @Override
+     public BossBar createBossBar(String title, BarColor color, BarStyle style, BarFlag... flags) {
+         return new CraftBossBar(title, color, style, flags);
+diff --git a/src/main/java/org/bukkit/craftbukkit/generator/OldCraftChunkData.java b/src/main/java/org/bukkit/craftbukkit/generator/OldCraftChunkData.java
+index 6f6bf950cd15b34031618782c82824cf0b191ff8..8d8c7d84a76b11e14ee252e93349d495eec77957 100644
+--- a/src/main/java/org/bukkit/craftbukkit/generator/OldCraftChunkData.java
++++ b/src/main/java/org/bukkit/craftbukkit/generator/OldCraftChunkData.java
+@@ -23,7 +23,7 @@ import org.bukkit.material.MaterialData;
+ public final class OldCraftChunkData implements ChunkGenerator.ChunkData {
+     private final int minHeight;
+     private final int maxHeight;
+-    private final LevelChunkSection[] sections;
++    private LevelChunkSection[] sections; // Paper
+     private final Registry<net.minecraft.world.level.biome.Biome> biomes;
+     private Set<BlockPos> tiles;
+     private final Set<BlockPos> lights = new HashSet<>();
+@@ -194,7 +194,13 @@ public final class OldCraftChunkData implements ChunkGenerator.ChunkData {
+         return this.tiles;
+     }
+ 
+-    Set<BlockPos> getLights() {
++    public Set<BlockPos> getLights() { // Paper
+         return this.lights;
+     }
++
++    // Paper start
++    public void setRawChunkData(LevelChunkSection[] sections) {
++        this.sections = sections;
++    }
++    // Paper end
+ }