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-rw-r--r--patches/server/0811-Always-parse-protochunk-light-sources-unless-it-is-m.patch53
1 files changed, 53 insertions, 0 deletions
diff --git a/patches/server/0811-Always-parse-protochunk-light-sources-unless-it-is-m.patch b/patches/server/0811-Always-parse-protochunk-light-sources-unless-it-is-m.patch
new file mode 100644
index 0000000000..96c4a80599
--- /dev/null
+++ b/patches/server/0811-Always-parse-protochunk-light-sources-unless-it-is-m.patch
@@ -0,0 +1,53 @@
+From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
+From: Spottedleaf <[email protected]>
+Date: Mon, 23 Aug 2021 04:50:05 -0700
+Subject: [PATCH] Always parse protochunk light sources unless it is marked as
+ non-lit
+
+Chunks not marked as lit will always go through the light engine,
+so they should always have their block sources parsed.
+
+diff --git a/src/main/java/net/minecraft/world/level/chunk/storage/ChunkSerializer.java b/src/main/java/net/minecraft/world/level/chunk/storage/ChunkSerializer.java
+index 2ade441dc4456d1670a81a3f58d4aa54d2888c19..300c95a3839954b9e631aa4d76c131a5c2d96394 100644
+--- a/src/main/java/net/minecraft/world/level/chunk/storage/ChunkSerializer.java
++++ b/src/main/java/net/minecraft/world/level/chunk/storage/ChunkSerializer.java
+@@ -304,16 +304,33 @@ public class ChunkSerializer {
+ BelowZeroRetrogen belowzeroretrogen = protochunk.getBelowZeroRetrogen();
+ boolean flag2 = chunkstatus.isOrAfter(ChunkStatus.LIGHT) || belowzeroretrogen != null && belowzeroretrogen.targetStatus().isOrAfter(ChunkStatus.LIGHT);
+
+- if (!flag && flag2) {
+- Iterator iterator = BlockPos.betweenClosed(chunkPos.getMinBlockX(), world.getMinBuildHeight(), chunkPos.getMinBlockZ(), chunkPos.getMaxBlockX(), world.getMaxBuildHeight() - 1, chunkPos.getMaxBlockZ()).iterator();
++ if (!flag) { // Paper - fix incorrect parsing of blocks that emit light - it should always parse it, unless the chunk is marked as lit
++ // Paper start - let's make sure the implementation isn't as slow as possible
++ int offX = chunkPos.x << 4;
++ int offZ = chunkPos.z << 4;
++
++ int minChunkSection = io.papermc.paper.util.WorldUtil.getMinSection(world);
++ int maxChunkSection = io.papermc.paper.util.WorldUtil.getMaxSection(world);
++
++ LevelChunkSection[] sections = achunksection;
++ for (int sectionY = minChunkSection; sectionY <= maxChunkSection; ++sectionY) {
++ LevelChunkSection section = sections[sectionY - minChunkSection];
++ if (section == null || section.hasOnlyAir()) {
++ // no sources in empty sections
++ continue;
++ }
++ int offY = sectionY << 4;
+
+- while (iterator.hasNext()) {
+- BlockPos blockposition = (BlockPos) iterator.next();
++ for (int index = 0; index < (16 * 16 * 16); ++index) {
++ if (section.states.get(index).getLightEmission() <= 0) {
++ continue;
++ }
+
+- if (((ChunkAccess) object).getBlockState(blockposition).getLightEmission() != 0) {
+- protochunk.addLight(blockposition);
++ // index = x | (z << 4) | (y << 8)
++ protochunk.addLight(new BlockPos(offX | (index & 15), offY | (index >>> 8), offZ | ((index >>> 4) & 15)));
+ }
+ }
++ // Paper end
+ }
+ }
+