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68 lines
2.2 KiB
C#
68 lines
2.2 KiB
C#
// ClassicalSharp copyright 2014-2016 UnknownShadow200 | Licensed under MIT
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// Part of fCraft | Copyright (c) 2009-2014 Matvei Stefarov <me@matvei.org> | BSD-3 | See LICENSE.txt
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using System;
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using System.IO;
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using System.IO.Compression;
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using ClassicalSharp.Entities;
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namespace ClassicalSharp.Map {
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/// <summary> Exports a world to a FCMv3 map file (fCraft server map) </summary>
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public sealed class MapFcm3Exporter : IMapFormatExporter {
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const uint Identifier = 0x0FC2AF40;
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const byte Revision = 13;
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const int chunkSize = 128 * 128 * 128;
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public void Save( Stream stream, Game game ) {
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World map = game.World;
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LocalPlayer p = game.LocalPlayer;
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BinaryWriter w = new BinaryWriter( stream );
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w.Write( Identifier );
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w.Write( Revision );
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w.Write( (short)map.Width );
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w.Write( (short)map.Height );
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w.Write( (short)map.Length );
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w.Write( (int)(p.Spawn.X * 32) );
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w.Write( (int)(p.Spawn.Y * 32) );
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w.Write( (int)(p.Spawn.Z * 32) );
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w.Write( Utils.DegreesToPacked( p.SpawnYaw ) );
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w.Write( Utils.DegreesToPacked( p.SpawnPitch ) );
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w.Write( 0 ); // Date modified
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w.Write( 0 ); // Date created
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w.Write( map.Uuid.ToByteArray() );
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w.Write( (byte)1 ); // layer count
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// skip over index and metacount
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long indexOffset = stream.Position;
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w.Seek( 29, SeekOrigin.Current );
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long offset = stream.Position;
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byte[] blocks = map.mapData;
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using( DeflateStream ds = new DeflateStream( stream, CompressionMode.Compress, true ) ) {
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for( int i = 0; i < blocks.Length; i += chunkSize ) {
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int len = Math.Min( chunkSize, blocks.Length - i );
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ds.Write( blocks, i, len );
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}
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}
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int compressedLength = (int)(stream.Position - offset);
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// come back to write the index
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w.BaseStream.Seek( indexOffset, SeekOrigin.Begin );
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w.Write( (byte)0 ); // data layer type (Blocks)
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w.Write( offset ); // offset, in bytes, from start of stream
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w.Write( compressedLength ); // compressed length, in bytes
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w.Write( 0 ); // general purpose field
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w.Write( 1 ); // element size
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w.Write( map.mapData.Length ); // element count
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w.Write( 0 ); // No metadata
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}
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}
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} |