LookingGlass compat

Author: FalsePattern

build.gradle.kts

@@ -51,9 +51,13 @@ minecraft_fp {
 }
 
 repositories {
+    cursemavenEX()
     exclusive(maven("mavenpattern", "https://mvn.falsepattern.com/releases/"), "com.falsepattern")
 }
 
 dependencies {
     apiSplit("com.falsepattern:falsepatternlib-mc1.7.10:1.5.9")
+
+    //LookingGlass 0.2.0.01
+    compileOnly(deobfCurse("lookingglass-230541:2321557"))
 }

src/main/java/com/falsepattern/chunk/internal/mixin/mixins/common/lookingglass/PacketChunkInfoMixin.java

@@ -0,0 +1,113 @@
+/*
+ * ChunkAPI
+ *
+ * Copyright (C) 2023-2025 FalsePattern, The MEGA Team, LegacyModdingMC contributors
+ * All Rights Reserved
+ *
+ * The above copyright notice and this permission notice shall be included
+ * in all copies or substantial portions of the Software.
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Lesser General Public License as published by
+ * the Free Software Foundation, only version 3 of the License.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public License
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+
+package com.falsepattern.chunk.internal.mixin.mixins.common.lookingglass;
+
+import com.xcompwiz.lookingglass.log.LoggerUtils;
+import com.xcompwiz.lookingglass.network.LookingGlassPacketManager;
+import com.xcompwiz.lookingglass.network.packet.PacketChunkInfo;
+import com.xcompwiz.lookingglass.network.packet.PacketHandlerBase;
+import com.xcompwiz.lookingglass.network.packet.PacketRequestChunk;
+import io.netty.buffer.ByteBuf;
+import org.spongepowered.asm.mixin.Mixin;
+import org.spongepowered.asm.mixin.Overwrite;
+import org.spongepowered.asm.mixin.Shadow;
+
+import net.minecraft.entity.player.EntityPlayer;
+import net.minecraft.network.play.server.S21PacketChunkData;
+import net.minecraft.world.chunk.Chunk;
+import cpw.mods.fml.common.network.internal.FMLProxyPacket;
+
+import java.util.concurrent.Semaphore;
+
+@Mixin(PacketChunkInfo.class)
+public abstract class PacketChunkInfoMixin extends PacketHandlerBase {
+    @Shadow(remap = false) private static Semaphore deflateGate;
+
+    @Shadow(remap = false)
+    private static int deflate(byte[] chunkData, byte[] compressedChunkData) {
+        return 0;
+    }
+
+    @Shadow(remap = false) public abstract void handle(EntityPlayer player, byte[] chunkData, int dim, int xPos, int zPos, boolean reqinit, short yPos, short yMSBPos);
+
+    @Shadow(remap = false) protected abstract byte[] inflateChunkData(ByteBuf in, int compressedsize, int uncompressedsize);
+
+    /**
+     * @author FalsePattern
+     * @reason This class was just copied vanilla code.
+     */
+    @Overwrite(remap = false)
+    public static S21PacketChunkData.Extracted getMapChunkData(Chunk chunk, boolean forceUpdate, int subChunkMask) {
+        return S21PacketChunkData.func_149269_a(chunk, forceUpdate, subChunkMask);
+    }
+
+    /**
+     * @author FalsePattern
+     * @reason Wired up to ChunkAPI
+     */
+    @Overwrite(remap = false)
+    public static FMLProxyPacket createPacket(Chunk chunk, boolean forceUpdate, int subChunkMask, int dim) {
+        int xPos = chunk.xPosition;
+        int zPos = chunk.zPosition;
+        S21PacketChunkData.Extracted extracted = getMapChunkData(chunk, forceUpdate, subChunkMask);
+        int realSubChunkMask = extracted.field_150280_b;
+        byte[] chunkData = extracted.field_150282_a;
+        deflateGate.acquireUninterruptibly();
+        byte[] compressedChunkData = new byte[chunkData.length];
+        int len = deflate(chunkData, compressedChunkData);
+        deflateGate.release();
+        ByteBuf data = PacketHandlerBase.createDataBuffer(PacketChunkInfo.class);
+        data.writeInt(dim);
+        data.writeInt(xPos);
+        data.writeInt(zPos);
+        data.writeBoolean(forceUpdate);
+        data.writeShort((short)(realSubChunkMask & 0xFFFF));
+        data.writeInt(len);
+        data.writeInt(chunkData.length);
+        data.ensureWritable(len);
+        data.writeBytes(compressedChunkData, 0, len);
+        return buildPacket(data);
+    }
+
+    /**
+     * @author FalsePattern
+     * @reason Wired up to ChunkAPI
+     */
+    @Overwrite(remap = false)
+    public void handle(ByteBuf in, EntityPlayer player) {
+        int dim = in.readInt();
+        int xPos = in.readInt();
+        int zPos = in.readInt();
+        boolean forceUpdate = in.readBoolean();
+        int subChunkMask = in.readShort() & 0xFFFF;
+        int compressedSize = in.readInt();
+        int uncompressedSize = in.readInt();
+        byte[] chunkData = this.inflateChunkData(in, compressedSize, uncompressedSize);
+        if (chunkData == null) {
+            LookingGlassPacketManager.bus.sendToServer(PacketRequestChunk.createPacket(xPos, subChunkMask, zPos, dim));
+            LoggerUtils.error("Chunk decompression failed: \t%d\t\t%d : %d\n", subChunkMask, compressedSize, uncompressedSize);
+        } else {
+            this.handle(player, chunkData, dim, xPos, zPos, forceUpdate, (short) subChunkMask, (short)0);
+        }
+    }
+}

src/main/java/com/falsepattern/chunk/internal/mixin/plugin/Mixin.java

@@ -31,6 +31,7 @@
 import java.util.function.Predicate;
 
 import static com.falsepattern.lib.mixin.IMixin.PredicateHelpers.always;
+import static com.falsepattern.lib.mixin.IMixin.PredicateHelpers.require;
 
 @RequiredArgsConstructor
 public enum Mixin implements IMixin {
@@ -44,6 +45,10 @@ public enum Mixin implements IMixin {
 
     ChunkMixin(Side.CLIENT, always(), "vanilla.ChunkMixin"),
     NetHandlerPlayClientMixin(Side.CLIENT, always(), "vanilla.NetHandlerPlayClientMixin"),
+
+    //region Looking Glass
+    PacketChunkInfoMixin(Side.COMMON, require(TargetedMod.LOOKINGGLASS), "lookingglass.PacketChunkInfoMixin"),
+    //endregion
     ;
     // @formatter:on
 

src/main/java/com/falsepattern/chunk/internal/mixin/plugin/TargetedMod.java

@@ -28,8 +28,11 @@
 
 import java.util.function.Predicate;
 
+import static com.falsepattern.lib.mixin.ITargetedMod.PredicateHelpers.contains;
+
 @RequiredArgsConstructor
 public enum TargetedMod implements ITargetedMod {
+    LOOKINGGLASS("Looking Glass", false, contains("lookingglass-"))
     ;
 
     @Getter