126 lines
3.5 KiB
Java
126 lines
3.5 KiB
Java
package com.hypixel.hytale.protocol.packets.worldmap;
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import com.hypixel.hytale.protocol.io.ValidationResult;
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import io.netty.buffer.ByteBuf;
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import java.util.Objects;
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import javax.annotation.Nonnull;
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import javax.annotation.Nullable;
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public class MapChunk {
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public static final int NULLABLE_BIT_FIELD_SIZE = 1;
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public static final int FIXED_BLOCK_SIZE = 9;
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public static final int VARIABLE_FIELD_COUNT = 1;
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public static final int VARIABLE_BLOCK_START = 9;
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public static final int MAX_SIZE = 16384023;
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public int chunkX;
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public int chunkZ;
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@Nullable
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public MapImage image;
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public MapChunk() {
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}
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public MapChunk(int chunkX, int chunkZ, @Nullable MapImage image) {
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this.chunkX = chunkX;
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this.chunkZ = chunkZ;
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this.image = image;
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}
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public MapChunk(@Nonnull MapChunk other) {
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this.chunkX = other.chunkX;
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this.chunkZ = other.chunkZ;
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this.image = other.image;
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}
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@Nonnull
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public static MapChunk deserialize(@Nonnull ByteBuf buf, int offset) {
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MapChunk obj = new MapChunk();
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byte nullBits = buf.getByte(offset);
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obj.chunkX = buf.getIntLE(offset + 1);
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obj.chunkZ = buf.getIntLE(offset + 5);
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int pos = offset + 9;
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if ((nullBits & 1) != 0) {
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obj.image = MapImage.deserialize(buf, pos);
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pos += MapImage.computeBytesConsumed(buf, pos);
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}
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return obj;
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}
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public static int computeBytesConsumed(@Nonnull ByteBuf buf, int offset) {
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byte nullBits = buf.getByte(offset);
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int pos = offset + 9;
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if ((nullBits & 1) != 0) {
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pos += MapImage.computeBytesConsumed(buf, pos);
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}
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return pos - offset;
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}
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public void serialize(@Nonnull ByteBuf buf) {
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byte nullBits = 0;
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if (this.image != null) {
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nullBits = (byte)(nullBits | 1);
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}
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buf.writeByte(nullBits);
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buf.writeIntLE(this.chunkX);
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buf.writeIntLE(this.chunkZ);
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if (this.image != null) {
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this.image.serialize(buf);
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}
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}
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public int computeSize() {
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int size = 9;
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if (this.image != null) {
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size += this.image.computeSize();
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}
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return size;
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}
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public static ValidationResult validateStructure(@Nonnull ByteBuf buffer, int offset) {
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if (buffer.readableBytes() - offset < 9) {
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return ValidationResult.error("Buffer too small: expected at least 9 bytes");
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} else {
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byte nullBits = buffer.getByte(offset);
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int pos = offset + 9;
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if ((nullBits & 1) != 0) {
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ValidationResult imageResult = MapImage.validateStructure(buffer, pos);
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if (!imageResult.isValid()) {
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return ValidationResult.error("Invalid Image: " + imageResult.error());
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}
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pos += MapImage.computeBytesConsumed(buffer, pos);
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}
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return ValidationResult.OK;
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}
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}
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public MapChunk clone() {
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MapChunk copy = new MapChunk();
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copy.chunkX = this.chunkX;
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copy.chunkZ = this.chunkZ;
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copy.image = this.image != null ? this.image.clone() : null;
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return copy;
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}
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@Override
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public boolean equals(Object obj) {
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if (this == obj) {
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return true;
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} else {
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return !(obj instanceof MapChunk other)
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? false
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: this.chunkX == other.chunkX && this.chunkZ == other.chunkZ && Objects.equals(this.image, other.image);
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}
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}
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@Override
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public int hashCode() {
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return Objects.hash(this.chunkX, this.chunkZ, this.image);
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}
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}
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