From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
From: NONPLAYT <76615486+NONPLAYT@users.noreply.github.com>
Date: Sat, 8 Mar 2025 13:27:07 +0300
Subject: [PATCH] ModernFix: compact_bit_storage

This patch is based on following mixins:
* "org/embeddedt/modernfix/common/mixin/perf/compact_bit_storage/PalettedContainerMixin.java"
By: embeddedt <42941056+embeddedt@users.noreply.github.com>
As part of: ModernFix (https://github.com/embeddedt/ModernFix)
Licensed under: GPL-3.0 (https://www.gnu.org/licenses/gpl-3.0.html)

diff --git a/net/minecraft/world/level/chunk/PalettedContainer.java b/net/minecraft/world/level/chunk/PalettedContainer.java
index a512609aaa823b940ed269c981fc9beec49a126e..2829ebdda8e9ad8945fe7d3f96c3cdaad798a40a 100644
--- a/net/minecraft/world/level/chunk/PalettedContainer.java
+++ b/net/minecraft/world/level/chunk/PalettedContainer.java
@@ -275,6 +275,28 @@ public class PalettedContainer<T> implements PaletteResize<T>, PalettedContainer
             data.palette.read(buffer);
             buffer.readFixedSizeLongArray(data.storage.getRaw());
             this.data = data;
+            // DivineMC start - ModernFix: compact_bit_storage
+            if (org.bxteam.divinemc.DivineConfig.useCompactBitStorage && _byte > 1) {
+                long[] storageArray = this.data.storage.getRaw();
+                boolean empty = true;
+                for (long l : storageArray) {
+                    if (l != 0) {
+                        empty = false;
+                        break;
+                    }
+                }
+                if (empty && storageArray.length > 0) {
+                    T value;
+                    try {
+                        value = this.data.palette.valueFor(0);
+                    } catch (RuntimeException e) {
+                        return;
+                    }
+                    this.data = this.createOrReuseData(null, 0);
+                    this.data.palette.idFor(value);
+                }
+            }
+            // DivineMC end - ModernFix: compact_bit_storage
             this.addPresetValues(); // Paper - Anti-Xray - Add preset values (inefficient, but this isn't used by the server)
             this.updateData(this.data); // Paper - optimise palette reads
         } finally {