Paper/patches/server/1036-Always-send-Banner-patterns-to-the-client.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: Shane Freeder <theboyetronic@gmail.com>
Date: Sun, 20 Oct 2024 18:23:59 +0100
Subject: [PATCH] Always send Banner patterns to the client
The mojang client will not remove patterns from a Banner when none
are sent inside of an update packet, given that this is not an expected
flow for them, this is not all too surprising. So, we shall resort to always
sending the patterns over the network for update packets.
diff --git a/src/main/java/net/minecraft/world/level/block/entity/BannerBlockEntity.java b/src/main/java/net/minecraft/world/level/block/entity/BannerBlockEntity.java
index 98bc87fe5d153cc4927f7e1b4a02f61d9dd019a0..9528935a120f7d5a1fdb1a796854478e8a83f833 100644
--- a/src/main/java/net/minecraft/world/level/block/entity/BannerBlockEntity.java
+++ b/src/main/java/net/minecraft/world/level/block/entity/BannerBlockEntity.java
@@ -63,7 +63,7 @@ public class BannerBlockEntity extends BlockEntity implements Nameable {
@Override
protected void saveAdditional(CompoundTag nbt, HolderLookup.Provider registries) {
super.saveAdditional(nbt, registries);
- if (!this.patterns.equals(BannerPatternLayers.EMPTY)) {
+ if (!this.patterns.equals(BannerPatternLayers.EMPTY) || serialisingForNetwork.get()) { // Paper - always send patterns to client
nbt.put("patterns", (Tag) BannerPatternLayers.CODEC.encodeStart(registries.createSerializationContext(NbtOps.INSTANCE), this.patterns).getOrThrow());
}
@@ -95,9 +95,18 @@ public class BannerBlockEntity extends BlockEntity implements Nameable {
return ClientboundBlockEntityDataPacket.create(this);
}
+ // Paper start - always send patterns to client
+ ThreadLocal<Boolean> serialisingForNetwork = ThreadLocal.withInitial(() -> Boolean.FALSE);
@Override
public CompoundTag getUpdateTag(HolderLookup.Provider registries) {
+ final Boolean wasSerialisingForNetwork = serialisingForNetwork.get();
+ try {
+ serialisingForNetwork.set(Boolean.TRUE);
return this.saveWithoutMetadata(registries);
+ } finally {
+ serialisingForNetwork.set(wasSerialisingForNetwork);
+ }
+ // Paper end - always send patterns to client
}
public BannerPatternLayers getPatterns() {