cn.nukkit.level.util.PalettedBlockStorage Maven / Gradle / Ivy
package cn.nukkit.level.util;
import cn.nukkit.level.GlobalBlockPalette;
import cn.nukkit.utils.BinaryStream;
import it.unimi.dsi.fastutil.ints.IntArrayList;
import it.unimi.dsi.fastutil.ints.IntList;
import java.util.function.IntConsumer;
public class PalettedBlockStorage {
private static final int SIZE = 4096;
public final IntList palette;
public BitArray bitArray;
public PalettedBlockStorage() {
this(BitArrayVersion.V2);
}
public PalettedBlockStorage(BitArrayVersion version) {
this.bitArray = version.createPalette(SIZE);
this.palette = new IntArrayList(16);
// Air is at the start of every palette.
// Except biome palette !!!
this.palette.add(GlobalBlockPalette.getOrCreateRuntimeId(0));
}
public PalettedBlockStorage(BitArray bitArray, IntList palette) {
this.palette = palette;
this.bitArray = bitArray;
}
private PalettedBlockStorage(BitArrayVersion version, int defaultState) {
this.bitArray = version.createPalette(SIZE);
this.palette = new IntArrayList(16);
this.palette.add(defaultState);
}
public static PalettedBlockStorage createFromBlockPalette(BitArrayVersion version) {
int runtimeId = GlobalBlockPalette.getOrCreateRuntimeId(0); // Air is first
return new PalettedBlockStorage(version, runtimeId);
}
public static PalettedBlockStorage createWithDefaultState(int defaultState) {
return createWithDefaultState(BitArrayVersion.V2, defaultState);
}
public static PalettedBlockStorage createWithDefaultState(BitArrayVersion version, int defaultState) {
return new PalettedBlockStorage(version, defaultState);
}
private int getPaletteHeader(BitArrayVersion version, boolean runtime) {
return (version.getId() << 1) | (runtime ? 1 : 0);
}
public void setBlock(int index, int runtimeId) {
try {
int id = this.idFor(runtimeId);
this.bitArray.set(index, id);
} catch (IllegalArgumentException e) {
throw new IllegalArgumentException("Unable to set block runtime ID: " + runtimeId + ", palette: " + palette, e);
}
}
public void writeTo(BinaryStream stream) {
stream.putByte((byte) getPaletteHeader(bitArray.getVersion(), true));
for (int word : bitArray.getWords()) {
stream.putLInt(word);
}
stream.putVarInt(palette.size());
palette.forEach((IntConsumer) stream::putVarInt);
}
private void onResize(BitArrayVersion version) {
BitArray newBitArray = version.createPalette(SIZE);
for (int i = 0; i < SIZE; i++) {
newBitArray.set(i, this.bitArray.get(i));
}
this.bitArray = newBitArray;
}
private int idFor(int runtimeId) {
int index = this.palette.indexOf(runtimeId);
if (index != -1) {
return index;
}
index = this.palette.size();
BitArrayVersion version = this.bitArray.getVersion();
if (index > version.getMaxEntryValue()) {
BitArrayVersion next = version.next();
if (next != null) {
this.onResize(next);
}
}
this.palette.add(runtimeId);
return index;
}
public boolean isEmpty() {
if (this.palette.size() == 1) {
return true;
}
for (int word : this.bitArray.getWords()) {
if (Integer.toUnsignedLong(word) != 0L) {
return false;
}
}
return true;
}
public PalettedBlockStorage copy() {
return new PalettedBlockStorage(this.bitArray.copy(), new IntArrayList(this.palette));
}
public void setBlock(int x, int y, int z, int runtimeId) {
this.setBlock((x << 8) | (z << 4) | y, runtimeId);
}
}
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