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Paper/patches/server/0919-Add-getChunkSnapshot-includeLightData-parameter.patch
Spottedleaf 8c5b837e05 Rework async chunk api implementation
Firstly, the old methods all routed to the CompletableFuture method.
However, the CF method could not guarantee that if the caller
was off-main that the future would be "completed" on-main. Since
the callback methods used the CF one, this meant that the callback
methods did not guarantee that the callbacks were to be called on
the main thread.

Now, all methods route to getChunkAtAsync(x, z, gen, urgent, cb)
so that the methods with the callback are guaranteed to invoke
the callback on the main thread. The CF behavior remains unchanged;
it may still appear to complete on main if invoked off-main.

Secondly, remove the scheduleOnMain invocation in the async
chunk completion. This unnecessarily delays the callback
by 1 tick.

Thirdly, add getChunksAtAsync(minX, minZ, maxX, maxZ, ...) which
will load chunks within an area. This method is provided as a helper
as keeping all chunks loaded within an area can be complicated to
implement for plugins (due to the lacking ticket API), and is
already implemented internally anyways.

Fourthly, remove the ticket addition that occured with getChunkAt
and getChunkAtAsync. The ticket addition may delay the unloading
of the chunk unnecessarily. It also fixes a very rare timing bug
where the future/callback would be completed after the chunk
unloads.
2024-11-18 23:00:59 -08:00

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Diff

From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
From: Warrior <50800980+Warriorrrr@users.noreply.github.com>
Date: Sat, 10 Feb 2024 10:03:48 +0100
Subject: [PATCH] Add getChunkSnapshot includeLightData parameter
diff --git a/src/main/java/org/bukkit/craftbukkit/CraftChunk.java b/src/main/java/org/bukkit/craftbukkit/CraftChunk.java
index 887a17a0833064eb5701222e5fb6f5ccf9511588..5fc9e8e969debb3e15ed474b36a1c48b086d0449 100644
--- a/src/main/java/org/bukkit/craftbukkit/CraftChunk.java
+++ b/src/main/java/org/bukkit/craftbukkit/CraftChunk.java
@@ -328,12 +328,21 @@ public class CraftChunk implements Chunk {
@Override
public ChunkSnapshot getChunkSnapshot(boolean includeMaxBlockY, boolean includeBiome, boolean includeBiomeTempRain) {
+ // Paper start - Add getChunkSnapshot includeLightData parameter
+ return getChunkSnapshot(includeMaxBlockY, includeBiome, includeBiomeTempRain, true);
+ }
+
+ @Override
+ public ChunkSnapshot getChunkSnapshot(boolean includeMaxBlockY, boolean includeBiome, boolean includeBiomeTempRain, boolean includeLightData) {
+ // Paper end - Add getChunkSnapshot includeLightData parameter
ChunkAccess chunk = this.getHandle(ChunkStatus.FULL);
LevelChunkSection[] cs = chunk.getSections();
PalettedContainer[] sectionBlockIDs = new PalettedContainer[cs.length];
- byte[][] sectionSkyLights = new byte[cs.length][];
- byte[][] sectionEmitLights = new byte[cs.length][];
+ // Paper start - Add getChunkSnapshot includeLightData parameter
+ byte[][] sectionSkyLights = includeLightData ? new byte[cs.length][] : null;
+ byte[][] sectionEmitLights = includeLightData ? new byte[cs.length][] : null;
+ // Paper end - Add getChunkSnapshot includeLightData parameter
boolean[] sectionEmpty = new boolean[cs.length];
PalettedContainerRO<Holder<net.minecraft.world.level.biome.Biome>>[] biome = (includeBiome || includeBiomeTempRain) ? new PalettedContainer[cs.length] : null;
@@ -350,6 +359,7 @@ public class CraftChunk implements Chunk {
}
// Paper end - Fix ChunkSnapshot#isSectionEmpty(int)
+ if (includeLightData) { // Paper - Add getChunkSnapshot includeLightData parameter
LevelLightEngine lightengine = this.worldServer.getLightEngine();
DataLayer skyLightArray = lightengine.getLayerListener(LightLayer.SKY).getDataLayerData(SectionPos.of(this.x, chunk.getSectionYFromSectionIndex(i), this.z)); // SPIGOT-7498: Convert section index
if (skyLightArray == null) {
@@ -365,6 +375,7 @@ public class CraftChunk implements Chunk {
sectionEmitLights[i] = new byte[2048];
System.arraycopy(emitLightArray.getData(), 0, sectionEmitLights[i], 0, 2048);
}
+ } // Paper - Add getChunkSnapshot includeLightData parameter
if (biome != null) {
biome[i] = ((PalettedContainer<Holder<net.minecraft.world.level.biome.Biome>>) cs[i].getBiomes()).copy(); // Paper - Perf: use copy instead of round tripping with codecs
diff --git a/src/main/java/org/bukkit/craftbukkit/CraftChunkSnapshot.java b/src/main/java/org/bukkit/craftbukkit/CraftChunkSnapshot.java
index c88e4ba701b2a2325b76478b7f47278157afd2ef..ddcbdbcbfeb6efe0a587b1181505423cc9d2c951 100644
--- a/src/main/java/org/bukkit/craftbukkit/CraftChunkSnapshot.java
+++ b/src/main/java/org/bukkit/craftbukkit/CraftChunkSnapshot.java
@@ -119,6 +119,7 @@ public class CraftChunkSnapshot implements ChunkSnapshot {
@Override
public final int getBlockSkyLight(int x, int y, int z) {
+ Preconditions.checkState(this.skylight != null, "ChunkSnapshot created without light data. Please call getSnapshot with includeLightData=true"); // Paper - Add getChunkSnapshot includeLightData parameter
this.validateChunkCoordinates(x, y, z);
int off = ((y & 0xF) << 7) | (z << 3) | (x >> 1);
@@ -127,6 +128,7 @@ public class CraftChunkSnapshot implements ChunkSnapshot {
@Override
public final int getBlockEmittedLight(int x, int y, int z) {
+ Preconditions.checkState(this.emitlight != null, "ChunkSnapshot created without light data. Please call getSnapshot with includeLightData=true"); // Paper - Add getChunkSnapshot includeLightData parameter
this.validateChunkCoordinates(x, y, z);
int off = ((y & 0xF) << 7) | (z << 3) | (x >> 1);