43 lines
		
	
	
	
		
			2.8 KiB
			
		
	
	
	
		
			Diff
		
	
	
	
	
	
			
		
		
	
	
			43 lines
		
	
	
	
		
			2.8 KiB
			
		
	
	
	
		
			Diff
		
	
	
	
	
	
From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
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From: Jason Penilla <11360596+jpenilla@users.noreply.github.com>
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Date: Thu, 9 Dec 2021 00:08:11 -0800
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Subject: [PATCH] Fix ChunkSnapshot#isSectionEmpty(int) and optimize
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 PalettedContainer copying by not using codecs
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diff --git a/src/main/java/org/bukkit/craftbukkit/CraftChunk.java b/src/main/java/org/bukkit/craftbukkit/CraftChunk.java
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index 0000000000000000000000000000000000000000..0000000000000000000000000000000000000000 100644
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--- a/src/main/java/org/bukkit/craftbukkit/CraftChunk.java
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+++ b/src/main/java/org/bukkit/craftbukkit/CraftChunk.java
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@@ -0,0 +0,0 @@ public class CraftChunk implements Chunk {
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         PalettedContainerRO<Holder<net.minecraft.world.level.biome.Biome>>[] biome = (includeBiome || includeBiomeTempRain) ? new PalettedContainer[cs.length] : null;
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         Registry<net.minecraft.world.level.biome.Biome> iregistry = this.worldServer.registryAccess().registryOrThrow(Registries.BIOME);
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-        Codec<PalettedContainerRO<Holder<net.minecraft.world.level.biome.Biome>>> biomeCodec = PalettedContainer.codecRO(iregistry.asHolderIdMap(), iregistry.holderByNameCodec(), PalettedContainer.Strategy.SECTION_BIOMES, iregistry.getHolderOrThrow(Biomes.PLAINS));
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         for (int i = 0; i < cs.length; i++) {
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-            CompoundTag data = new CompoundTag();
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-            data.put("block_states", ChunkSerializer.BLOCK_STATE_CODEC.encodeStart(NbtOps.INSTANCE, cs[i].getStates()).get().left().get());
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-            sectionBlockIDs[i] = ChunkSerializer.BLOCK_STATE_CODEC.parse(NbtOps.INSTANCE, data.getCompound("block_states")).get().left().get();
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+            // Paper start
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+            sectionEmpty[i] = cs[i].hasOnlyAir(); // Paper - fix sectionEmpty array not being filled
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+            if (!sectionEmpty[i]) {
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+                sectionBlockIDs[i] = cs[i].getStates().copy(); // Paper - use copy instead of round tripping with codecs
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+            } else {
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+                sectionBlockIDs[i] = CraftChunk.emptyBlockIDs; // Paper - use cached instance for empty block sections
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+            }
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+            // Paper end
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             LevelLightEngine lightengine = this.worldServer.getLightEngine();
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             DataLayer skyLightArray = lightengine.getLayerListener(LightLayer.SKY).getDataLayerData(SectionPos.of(x, i, z));
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@@ -0,0 +0,0 @@ public class CraftChunk implements Chunk {
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             }
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             if (biome != null) {
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-                data.put("biomes", biomeCodec.encodeStart(NbtOps.INSTANCE, cs[i].getBiomes()).get().left().get());
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-                biome[i] = biomeCodec.parse(NbtOps.INSTANCE, data.getCompound("biomes")).get().left().get();
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+                biome[i] = ((PalettedContainer<Holder<net.minecraft.world.level.biome.Biome>>) cs[i].getBiomes()).copy(); // Paper - use copy instead of round tripping with codecs
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             }
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         }
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