ec1cc10821
- [X] Converts design state detailed packet - [X] Removes `Packet` class - [X] Removes `Send(Packet)` function signatures - [X] Removes `PacketWriter` class - [X] Updates dependencies.
268 lines
9.7 KiB
C#
268 lines
9.7 KiB
C#
/*************************************************************************
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* ModernUO *
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* Copyright (C) 2019-2021 - ModernUO Development Team *
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* Email: hi@modernuo.com *
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* File: HousePackets.cs *
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* *
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* This program is free software: you can redistribute it and/or modify *
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* it under the terms of the GNU General Public License as published by *
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* the Free Software Foundation, either version 3 of the License, or *
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* (at your option) any later version. *
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* *
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* You should have received a copy of the GNU General Public License *
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* along with this program. If not, see <http://www.gnu.org/licenses/>. *
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*************************************************************************/
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using System;
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using System.Buffers;
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using System.IO;
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using System.IO.Compression;
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using System.Runtime.CompilerServices;
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using Server.Network;
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namespace Server.Multis
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{
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public static class HousePackets
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{
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public static void SendBeginHouseCustomization(this NetState ns, Serial house)
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{
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if (ns == null)
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{
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return;
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}
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var writer = new SpanWriter(stackalloc byte[17]);
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writer.Write((byte)0xBF); // Packet Id
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writer.Write((ushort)17);
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writer.Write((short)0x20); // Sub-packet
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writer.Write(house);
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writer.Write((byte)0x04); // command
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writer.Write((ushort)0x0000);
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writer.Write((ushort)0xFFFF);
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writer.Write((ushort)0xFFFF);
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writer.Write((byte)0xFF);
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ns.Send(writer.Span);
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}
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public static void SendEndHouseCustomization(this NetState ns, Serial house)
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{
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if (ns == null)
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{
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return;
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}
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var writer = new SpanWriter(stackalloc byte[17]);
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writer.Write((byte)0xBF); // Packet Id
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writer.Write((ushort)17);
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writer.Write((short)0x20); // Sub-packet
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writer.Write(house);
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writer.Write((byte)0x05); // command
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writer.Write((ushort)0x0000);
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writer.Write((ushort)0xFFFF);
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writer.Write((ushort)0xFFFF);
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writer.Write((byte)0xFF);
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ns.Send(writer.Span);
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}
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public static void SendDesignStateGeneral(this NetState ns, Serial house, int revision)
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{
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if (ns == null)
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{
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return;
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}
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var writer = new SpanWriter(stackalloc byte[13]);
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writer.Write((byte)0xBF); // Packet Id
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writer.Write((ushort)13);
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writer.Write((short)0x1D); // Sub-packet
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writer.Write(house);
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writer.Write(revision);
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ns.Send(writer.Span);
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}
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private const int planeCount = 9;
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private const int planeLength = 0x400; // ItemID (max 1024 items per plane within the design grid)
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private const int stairsCount = 6;
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private const int stairsLength = 5; // ItemID, X, Y, Z (max 4500 items)
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private const int stairsPerBuffer = 750;
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// Maximum size of the packed packet (31988 bytes)
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private static readonly int maxPacketLength =
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18 +
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(Zlib.MaxPackSize(planeLength) + 4) * planeCount + // 9369
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(Zlib.MaxPackSize(stairsPerBuffer * stairsLength) + 4) * stairsCount; // 22602
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public static byte[] CreateHouseDesignStateDetailed(uint serial, int revision, MultiComponentList components)
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{
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var xMin = components.Min.X;
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var yMin = components.Min.Y;
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var xMax = components.Max.X;
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var yMax = components.Max.Y;
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var tiles = components.List;
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const int totalPlaneLength = planeLength * planeCount;
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const int stairsBufferLength = stairsPerBuffer * stairsLength;
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const int maxUnpackedSize = totalPlaneLength + stairsBufferLength * stairsCount;
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using var inflatedWriter = new SpanWriter(maxUnpackedSize);
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Span<bool> planesUsed = stackalloc bool[9];
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var index = 0;
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var stairsIndex = totalPlaneLength;
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var totalStairsUsed = 0;
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var width = xMax - xMin + 1;
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var height = yMax - yMin + 1;
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for (var i = 0; i < tiles.Length; ++i)
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{
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var mte = tiles[i];
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var x = mte.OffsetX - xMin;
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var y = mte.OffsetY - yMin;
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int z = mte.OffsetZ;
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var floor = TileData.ItemTable[mte.ItemId & TileData.MaxItemValue].Height <= 0;
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int plane = z switch
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{
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0 => 0,
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7 => 1,
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27 => 2,
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47 => 3,
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67 => 4,
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_ => -1
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};
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if (plane > -1)
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{
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int size;
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if (plane == 0)
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{
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size = height;
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}
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else if (floor)
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{
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size = height - 2;
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x -= 1;
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y -= 1;
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}
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else
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{
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size = height - 1;
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plane += 4;
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}
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index = (x * size + y) * 2;
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if (x >= 0 && y >= 0 && y < size && index + 1 < 0x400)
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{
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var planeUsed = planesUsed[plane];
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if (!planeUsed)
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{
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inflatedWriter.Seek(plane * planeLength, SeekOrigin.Begin);
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inflatedWriter.Clear(planeLength);
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planesUsed[plane] = true;
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}
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inflatedWriter.Seek(index, SeekOrigin.Begin);
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inflatedWriter.Write(mte.ItemId);
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continue;
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}
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}
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inflatedWriter.Seek(stairsIndex, SeekOrigin.Begin);
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inflatedWriter.Write(mte.ItemId);
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inflatedWriter.Write((byte)mte.OffsetX);
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inflatedWriter.Write((byte)mte.OffsetY);
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inflatedWriter.Write((byte)mte.OffsetZ);
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stairsIndex = inflatedWriter.Position;
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totalStairsUsed++;
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}
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var buffer = GC.AllocateUninitializedArray<byte>(maxPacketLength);
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var writer = new SpanWriter(buffer);
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writer.Write((byte)0xD8); // Packet ID
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writer.Seek(2, SeekOrigin.Current); // Length
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writer.Write((byte)0x03); // Compression Type
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writer.Write((byte)0x00); // Unknown
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writer.Write(serial);
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writer.Write(revision);
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writer.Write((short)tiles.Length);
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writer.Seek(3, SeekOrigin.Current); // Buffer Length, Plane Count
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var totalPlanes = 0;
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var totalLength = 1; // includes plane count
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for (var i = 0; i < planeCount; i++)
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{
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if (!planesUsed[i])
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{
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inflatedWriter.Seek(planeCount, SeekOrigin.Current);
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continue;
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}
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int size = i switch
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{
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0 => width * height * 2,
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< 5 => (width - 1) * (height - 2) * 2,
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_ => width * (height - 1) * 2
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};
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var source = inflatedWriter.RawBuffer.Slice(i * planeLength, size);
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writer.Write((byte)(0x20 | i));
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WritePacked(source, ref writer, out int destLength);
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totalLength += 4 + destLength;
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totalPlanes++;
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}
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index = 0;
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while (totalStairsUsed > 0)
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{
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var count = Math.Min(stairsPerBuffer, totalStairsUsed);
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totalStairsUsed -= count;
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var start = totalPlaneLength + index * stairsLength;
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var size = count * 5;
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var source = inflatedWriter.RawBuffer.Slice(start, size);
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writer.Write((byte)(9 + index++));
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WritePacked(source, ref writer, out int destLength);
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totalLength += 4 + destLength;
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totalPlanes++;
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}
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writer.Seek(15, SeekOrigin.Begin);
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writer.Write((short)totalLength);
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writer.Write((byte)totalPlanes);
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writer.WritePacketLength();
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// TODO: Avoid this somehow.
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Array.Resize(ref buffer, writer.BytesWritten);
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return buffer;
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}
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[MethodImpl(MethodImplOptions.AggressiveInlining)]
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private static void WritePacked(ReadOnlySpan<byte> source, ref SpanWriter writer, out int length)
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{
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var size = source.Length;
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var dest = writer.RawBuffer.Slice(writer.Position + 3);
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length = dest.Length;
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var ce = Zlib.Pack(dest, ref length, source, ZlibQuality.Default);
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if (ce != ZlibError.Okay)
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{
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Console.WriteLine("ZLib error: {0} (#{1})", ce, (int)ce);
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length = 0;
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size = 0;
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}
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writer.Write((byte)size);
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writer.Write((byte)length);
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writer.Write((byte)(((size >> 4) & 0xF0) | ((length >> 8) & 0xF)));
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writer.Seek(length, SeekOrigin.Current);
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}
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}
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}
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