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01a13871de
Patch documentation to come Issues with the old system that are fixed now: - World generation does not scale with cpu cores effectively. - Relies on the main thread for scheduling and maintaining chunk state, dropping chunk load/generate rates at lower tps. - Unreliable prioritisation of chunk gen/load calls that block the main thread. - Shutdown logic is utterly unreliable, as it has to wait for all chunks to unload - is it guaranteed that the chunk system is in a state on shutdown that it can reliably do this? Watchdog shutdown also typically failed due to thread checks, which is now resolved. - Saving of data is not unified (i.e can save chunk data without saving entity data, poses problems for desync if shutdown is really abnormal. - Entities are not loaded with chunks. This caused quite a bit of headache for Chunk#getEntities API, but now the new chunk system loads entities with chunks so that they are ready whenever the chunk loads in. Effectively brings the behavior back to 1.16 era, but still storing entities in their own separate regionfiles. The above list is not complete. The patch documentation will complete it. New chunk system hard relies on starlight and dataconverter, and most importantly the new concurrent utilities in ConcurrentUtil. Some of the old async chunk i/o interface (i.e the old file io thread reroutes _some_ calls to the new file io thread) is kept for plugin compat reasons. It will be removed in the next major version of minecraft. The old legacy chunk system patches have been moved to the removed folder in case we need them again.
108 lines
6.5 KiB
Diff
108 lines
6.5 KiB
Diff
From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
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From: Noah van der Aa <ndvdaa@gmail.com>
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Date: Tue, 3 Aug 2021 17:28:27 +0200
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Subject: [PATCH] Hide unnecessary itemmeta from clients
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diff --git a/src/main/java/net/minecraft/server/level/ServerEntity.java b/src/main/java/net/minecraft/server/level/ServerEntity.java
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index 319dfa82dff1fe188a52bed5aa2d39575853b793..919758363c7b703cb200582768e68c97ce5c807a 100644
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--- a/src/main/java/net/minecraft/server/level/ServerEntity.java
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+++ b/src/main/java/net/minecraft/server/level/ServerEntity.java
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@@ -311,7 +311,7 @@ public class ServerEntity {
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if (!itemstack.isEmpty()) {
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// Paper start - prevent oversized data
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final ItemStack sanitized = LivingEntity.sanitizeItemStack(itemstack.copy(), false);
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- list.add(Pair.of(enumitemslot, sanitized));
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+ list.add(Pair.of(enumitemslot, ((LivingEntity) this.entity).stripMeta(sanitized, false))); // Paper - remove unnecessary item meta
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// Paper end
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}
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}
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diff --git a/src/main/java/net/minecraft/server/network/ServerGamePacketListenerImpl.java b/src/main/java/net/minecraft/server/network/ServerGamePacketListenerImpl.java
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index 678c0b1c37b16e405205933a16f0d2d29359fd12..1d024bfbada440c93b1174568feaa67544f7f0d2 100644
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--- a/src/main/java/net/minecraft/server/network/ServerGamePacketListenerImpl.java
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+++ b/src/main/java/net/minecraft/server/network/ServerGamePacketListenerImpl.java
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@@ -2816,8 +2816,8 @@ public class ServerGamePacketListenerImpl implements ServerPlayerConnection, Tic
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}
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// Paper end
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// SPIGOT-7136 - Allays
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- if (entity instanceof Allay) {
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- ServerGamePacketListenerImpl.this.send(new ClientboundSetEquipmentPacket(entity.getId(), Arrays.stream(net.minecraft.world.entity.EquipmentSlot.values()).map((slot) -> Pair.of(slot, ((LivingEntity) entity).getItemBySlot(slot).copy())).collect(Collectors.toList())));
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+ if (entity instanceof Allay allay) { // Paper
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+ ServerGamePacketListenerImpl.this.send(new ClientboundSetEquipmentPacket(entity.getId(), Arrays.stream(net.minecraft.world.entity.EquipmentSlot.values()).map((slot) -> Pair.of(slot, allay.stripMeta(allay.getItemBySlot(slot), true))).collect(Collectors.toList()))); // Paper - remove unnecessary item meta
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player.containerMenu.sendAllDataToRemote();
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}
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}
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diff --git a/src/main/java/net/minecraft/world/entity/LivingEntity.java b/src/main/java/net/minecraft/world/entity/LivingEntity.java
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index e7560eb298b563231407de832a81bb2c97e3c4cf..d6ecdeab398d7bfde3d760ada0374245f03014b3 100644
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--- a/src/main/java/net/minecraft/world/entity/LivingEntity.java
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+++ b/src/main/java/net/minecraft/world/entity/LivingEntity.java
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@@ -3136,7 +3136,7 @@ public abstract class LivingEntity extends Entity {
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// Paper start - prevent oversized data
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ItemStack toSend = sanitizeItemStack(itemstack1, true);
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- list.add(Pair.of(enumitemslot, toSend));
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+ list.add(Pair.of(enumitemslot, stripMeta(toSend, toSend == itemstack1))); // Paper - hide unnecessary item meta
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// Paper end
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switch (enumitemslot.getType()) {
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case HAND:
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@@ -3150,6 +3150,59 @@ public abstract class LivingEntity extends Entity {
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((ServerLevel) this.level).getChunkSource().broadcast(this, new ClientboundSetEquipmentPacket(this.getId(), list));
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}
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+ // Paper start - hide unnecessary item meta
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+ public ItemStack stripMeta(final ItemStack itemStack, final boolean copyItemStack) {
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+ if (itemStack.isEmpty() || (!itemStack.hasTag() && itemStack.getCount() < 2)) {
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+ return itemStack;
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+ }
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+
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+ final ItemStack copy = copyItemStack ? itemStack.copy() : itemStack;
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+ if (level.paperConfig().anticheat.obfuscation.items.hideDurability) {
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+ // Only show damage values for elytra's, since they show a different texture when broken.
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+ if (!copy.is(Items.ELYTRA) || copy.getDamageValue() < copy.getMaxDamage() - 1) {
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+ copy.setDamageValue(0);
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+ }
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+ }
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+
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+ if (level.paperConfig().anticheat.obfuscation.items.hideItemmeta) {
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+ // Some resource packs show different textures when there is more than one item. Since this shouldn't provide a big advantage,
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+ // we'll tell the client if there's one or (more than) two items.
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+ copy.setCount(copy.getCount() > 1 ? 2 : 1);
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+ // We can't just strip out display, leather helmets still use the display.color tag.
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+ final CompoundTag tag = copy.getTag();
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+ if (tag != null) {
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+ if (tag.get("display") instanceof CompoundTag displayTag) {
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+ displayTag.remove("Lore");
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+ displayTag.remove("Name");
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+ }
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+
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+ if (tag.get("Enchantments") instanceof ListTag enchantmentsTag && !enchantmentsTag.isEmpty()) {
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+ // The client still renders items with the enchantment glow if the enchantments tag contains at least one (empty) child.
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+ ListTag enchantments = new ListTag();
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+ CompoundTag fakeEnchantment = new CompoundTag();
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+ // Soul speed boots generate client side particles.
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+ if (EnchantmentHelper.getItemEnchantmentLevel(Enchantments.SOUL_SPEED, itemStack) > 0) {
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+ fakeEnchantment.putString("id", org.bukkit.enchantments.Enchantment.SOUL_SPEED.getKey().asString());
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+ fakeEnchantment.putInt("lvl", 1);
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+ }
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+ enchantments.add(fakeEnchantment);
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+ tag.put("Enchantments", enchantments);
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+ }
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+ tag.remove("AttributeModifiers");
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+
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+ // Books
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+ tag.remove("author");
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+ tag.remove("filtered_title");
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+ tag.remove("pages");
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+ tag.remove("filtered_pages");
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+ tag.remove("title");
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+ tag.remove("generation");
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+ }
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+ }
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+ return copy;
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+ }
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+ // Paper end
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+
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// Paper start - prevent oversized data
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public static ItemStack sanitizeItemStack(final ItemStack itemStack, final boolean copyItemStack) {
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if (itemStack.isEmpty() || !itemStack.hasTag()) {
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