Use List and Map, fixes duplicate block ids in palette causing issues

common/src/main/java/us/myles/ViaVersion/api/minecraft/chunks/ChunkSection.java

@@ -1,11 +1,14 @@
 package us.myles.ViaVersion.api.minecraft.chunks;
 
-import com.google.common.collect.BiMap;
-import com.google.common.collect.HashBiMap;
 import io.netty.buffer.ByteBuf;
 import lombok.Getter;
 import lombok.Setter;
 
+import java.util.ArrayList;
+import java.util.HashMap;
+import java.util.List;
+import java.util.Map;
+
 public class ChunkSection {
     /**
      * Size (dimensions) of blocks in a chunks section.
@@ -15,8 +18,8 @@ public class ChunkSection {
      * Length of the sky and block light nibble arrays.
      */
     public static final int LIGHT_LENGTH = 16 * 16 * 16 / 2; // size * size * size / 2 (nibble bit count)
-    @Getter
+    private List<Integer> palette = new ArrayList<>();
-    private BiMap<Integer, Integer> palette = HashBiMap.create();
+    private Map<Integer, Integer> inversePalette = new HashMap<>();
     private final int[] blocks;
     private NibbleArray blockLight;
     private NibbleArray skyLight;
@@ -27,7 +30,8 @@ public class ChunkSection {
     public ChunkSection() {
         this.blocks = new int[SIZE];
         this.blockLight = new NibbleArray(SIZE);
-        palette.put(0, 0);
+        palette.add(0);
+        inversePalette.put(0, 0);
     }
 
     /**
@@ -58,12 +62,12 @@ public class ChunkSection {
 
     public int getFlatBlock(int x, int y, int z) {
         int index = blocks[index(x, y, z)];
-        return palette.inverse().get(index);
+        return palette.get(index);
     }
 
     public int getFlatBlock(int idx) {
         int index = blocks[idx];
-        return palette.inverse().get(index);
+        return palette.get(index);
     }
 
     public void setBlock(int idx, int type, int data) {
@@ -84,16 +88,32 @@ public class ChunkSection {
 
     public int getPaletteEntry(int index) {
         if (index < 0 || index >= palette.size()) throw new IndexOutOfBoundsException();
-        return palette.inverse().get(index);
+        return palette.get(index);
     }
 
     public void setPaletteEntry(int index, int id) {
         if (index < 0 || index >= palette.size()) throw new IndexOutOfBoundsException();
-        palette.forcePut(id, index);
+        palette.set(index, id);
+        inversePalette.put(id, index);
     }
 
     public void replacePaletteEntry(int oldId, int newId) {
-        if (palette.containsKey(oldId)) palette.put(newId, palette.remove(oldId));
+    	Integer index = inversePalette.remove(oldId);
+    	if (index == null) return;
+    	inversePalette.put(newId, index);
+	    for (int i = 0; i < palette.size(); i++) {
+		    if (palette.get(i) == oldId) palette.set(i, newId);
+	    }
+    }
+
+    public void addPaletteEntry(int id) {
+    	inversePalette.put(id, palette.size());
+    	palette.add(id);
+    }
+
+    public void clearPalette() {
+    	palette.clear();
+    	inversePalette.clear();
     }
 
     /**
@@ -104,9 +124,11 @@ public class ChunkSection {
      * @param id  The raw or flat id of the block
      */
     public void setFlatBlock(int idx, int id) {
-        Integer index = palette.get(id);
+	    Integer index = inversePalette.get(id);
 	    if (index == null) {
-            palette.put(id, index = palette.size());
+		    index = palette.size();
+		    palette.add(id);
+		    inversePalette.put(id, index);
 	    }
 
 	    blocks[idx] = index;

common/src/main/java/us/myles/ViaVersion/api/type/types/version/ChunkSectionType1_13.java

@@ -1,6 +1,5 @@
 package us.myles.ViaVersion.api.type.types.version;
 
-import com.google.common.collect.BiMap;
 import io.netty.buffer.ByteBuf;
 import us.myles.ViaVersion.api.minecraft.chunks.ChunkSection;
 import us.myles.ViaVersion.api.type.Type;
@@ -14,8 +13,6 @@ public class ChunkSectionType1_13 extends Type<ChunkSection> {
     @Override
     public ChunkSection read(ByteBuf buffer) throws Exception {
         ChunkSection chunkSection = new ChunkSection();
-        BiMap<Integer, Integer> palette = chunkSection.getPalette();
-        palette.clear();
 
         // Reaad bits per block
         int bitsPerBlock = buffer.readUnsignedByte();
@@ -32,8 +29,9 @@ public class ChunkSectionType1_13 extends Type<ChunkSection> {
         }
         int paletteLength = bitsPerBlock == 14 ? 0 : Type.VAR_INT.read(buffer);
         // Read palette
+        chunkSection.clearPalette();
         for (int i = 0; i < paletteLength; i++) {
-            palette.put(Type.VAR_INT.read(buffer), palette.size());
+            chunkSection.addPaletteEntry(Type.VAR_INT.read(buffer));
         }
 
         // Read blocks
@@ -68,10 +66,8 @@ public class ChunkSectionType1_13 extends Type<ChunkSection> {
 
     @Override
     public void write(ByteBuf buffer, ChunkSection chunkSection) throws Exception {
-        BiMap<Integer, Integer> palette = chunkSection.getPalette();
-
         int bitsPerBlock = 4;
-        while (palette.size() > 1 << bitsPerBlock) {
+        while (chunkSection.getPaletteSize() > 1 << bitsPerBlock) {
             bitsPerBlock += 1;
         }
 
@@ -85,9 +81,9 @@ public class ChunkSectionType1_13 extends Type<ChunkSection> {
 
         // Write pallet (or not)
         if (bitsPerBlock != 14) {
-            Type.VAR_INT.write(buffer, palette.size());
+            Type.VAR_INT.write(buffer, chunkSection.getPaletteSize());
-            for (int i = 0; i < palette.size(); i++) {
+            for (int i = 0; i < chunkSection.getPaletteSize(); i++) {
-                Type.VAR_INT.write(buffer, palette.inverse().get(i));
+                Type.VAR_INT.write(buffer, chunkSection.getPaletteEntry(i));
             }
         }
 

common/src/main/java/us/myles/ViaVersion/api/type/types/version/ChunkSectionType1_8.java

@@ -17,7 +17,7 @@ public class ChunkSectionType1_8 extends Type<ChunkSection> {
     @Override
     public ChunkSection read(ByteBuf buffer) throws Exception {
         ChunkSection chunkSection = new ChunkSection();
-        chunkSection.getPalette().clear();
+        chunkSection.clearPalette();
 
         byte[] blockData = new byte[ChunkSection.SIZE * 2];
         buffer.readBytes(blockData);

common/src/main/java/us/myles/ViaVersion/api/type/types/version/ChunkSectionType1_9.java

@@ -14,8 +14,6 @@ public class ChunkSectionType1_9 extends Type<ChunkSection> {
     @Override
     public ChunkSection read(ByteBuf buffer) throws Exception {
         ChunkSection chunkSection = new ChunkSection();
-        BiMap<Integer, Integer> palette = chunkSection.getPalette();
-        palette.clear();
 
         // Reaad bits per block
         int bitsPerBlock = buffer.readUnsignedByte();
@@ -32,9 +30,10 @@ public class ChunkSectionType1_9 extends Type<ChunkSection> {
         }
         int paletteLength = Type.VAR_INT.read(buffer);
         // Read palette
+        chunkSection.clearPalette();
         for (int i = 0; i < paletteLength; i++) {
             if (bitsPerBlock != 13) {
-                palette.put(Type.VAR_INT.read(buffer), palette.size());
+                chunkSection.addPaletteEntry(Type.VAR_INT.read(buffer));
             } else {
                 Type.VAR_INT.read(buffer);
             }
@@ -72,19 +71,17 @@ public class ChunkSectionType1_9 extends Type<ChunkSection> {
 
     @Override
     public void write(ByteBuf buffer, ChunkSection chunkSection) throws Exception {
-        BiMap<Integer, Integer> palette = chunkSection.getPalette();
-
         int bitsPerBlock = 4;
-        while (palette.size() > 1 << bitsPerBlock) {
+        while (chunkSection.getPaletteSize() > 1 << bitsPerBlock) {
             bitsPerBlock += 1;
         }
         long maxEntryValue = (1L << bitsPerBlock) - 1;
         buffer.writeByte(bitsPerBlock);
 
         // Write pallet
-        Type.VAR_INT.write(buffer, palette.size());
+        Type.VAR_INT.write(buffer, chunkSection.getPaletteSize());
-        for (int i = 0; i < palette.size(); i++) {
+        for (int i = 0; i < chunkSection.getPaletteSize(); i++) {
-            Type.VAR_INT.write(buffer, palette.inverse().get(i));
+            Type.VAR_INT.write(buffer, chunkSection.getPaletteEntry(i));
         }
 
         int length = (int) Math.ceil(ChunkSection.SIZE * bitsPerBlock / 64.0);