ModernUO/Projects/Server/TileData.cs

/***************************************************************************
 *                                TileData.cs
 *                            -------------------
 *   begin                : May 1, 2002
 *   copyright            : (C) The RunUO Software Team
 *   email                : info@runuo.com
 *
 *   $Id$
 *
 ***************************************************************************/

/***************************************************************************
 *
 *   This program is free software; you can redistribute it and/or modify
 *   it under the terms of the GNU General Public License as published by
 *   the Free Software Foundation; either version 2 of the License, or
 *   (at your option) any later version.
 *
 ***************************************************************************/

using System;
using System.IO;
using System.Text;

namespace Server
{
    public struct LandData
    {
        public LandData(string name, TileFlag flags)
        {
            Name = name;
            Flags = flags;
        }

        public string Name { get; set; }

        public TileFlag Flags { get; set; }
    }

    public struct ItemData
    {
        private byte m_Weight;
        private byte m_Quality;
        private byte m_Quantity;
        private byte m_Value;
        private byte m_Height;

        public ItemData(string name, TileFlag flags, int weight, int quality, int quantity, int value, int height)
        {
            Name = name;
            Flags = flags;
            m_Weight = (byte)weight;
            m_Quality = (byte)quality;
            m_Quantity = (byte)quantity;
            m_Value = (byte)value;
            m_Height = (byte)height;
        }

        public string Name { get; set; }

        public TileFlag Flags { get; set; }

        public bool Bridge
        {
            get => (Flags & TileFlag.Bridge) != 0;
            set
            {
                if (value)
                    Flags |= TileFlag.Bridge;
                else
                    Flags &= ~TileFlag.Bridge;
            }
        }

        public bool Impassable
        {
            get => (Flags & TileFlag.Impassable) != 0;
            set
            {
                if (value)
                    Flags |= TileFlag.Impassable;
                else
                    Flags &= ~TileFlag.Impassable;
            }
        }

        public bool Surface
        {
            get => (Flags & TileFlag.Surface) != 0;
            set
            {
                if (value)
                    Flags |= TileFlag.Surface;
                else
                    Flags &= ~TileFlag.Surface;
            }
        }

        public int Weight
        {
            get => m_Weight;
            set => m_Weight = (byte)value;
        }

        public int Quality
        {
            get => m_Quality;
            set => m_Quality = (byte)value;
        }

        public int Quantity
        {
            get => m_Quantity;
            set => m_Quantity = (byte)value;
        }

        public int Value
        {
            get => m_Value;
            set => m_Value = (byte)value;
        }

        public int Height
        {
            get => m_Height;
            set => m_Height = (byte)value;
        }

        public int CalcHeight
        {
            get
            {
                if ((Flags & TileFlag.Bridge) != 0)
                    return m_Height / 2;
                return m_Height;
            }
        }
    }

    [Flags]
    public enum TileFlag : long
    {
        None = 0x00000000,
        Background = 0x00000001,
        Weapon = 0x00000002,
        Transparent = 0x00000004,
        Translucent = 0x00000008,
        Wall = 0x00000010,
        Damaging = 0x00000020,
        Impassable = 0x00000040,
        Wet = 0x00000080,
        Unknown1 = 0x00000100,
        Surface = 0x00000200,
        Bridge = 0x00000400,
        Generic = 0x00000800,
        Window = 0x00001000,
        NoShoot = 0x00002000,
        ArticleA = 0x00004000,
        ArticleAn = 0x00008000,
        Internal = 0x00010000,
        Foliage = 0x00020000,
        PartialHue = 0x00040000,
        Unknown2 = 0x00080000,
        Map = 0x00100000,
        Container = 0x00200000,
        Wearable = 0x00400000,
        LightSource = 0x00800000,
        Animation = 0x01000000,
        NoDiagonal = 0x02000000,
        Unknown3 = 0x04000000,
        Armor = 0x08000000,
        Roof = 0x10000000,
        Door = 0x20000000,
        StairBack = 0x40000000,
        StairRight = 0x80000000
    }

    public static class TileData
    {
        private static readonly byte[] m_StringBuffer = new byte[20];

        static TileData()
        {
            ItemTable = new ItemData[0x10000];
            LandTable = new LandData[0x4000];

            if (Core.IsRunningFromXUnit) return;

            var filePath = Core.FindDataFile("tiledata.mul");

            using var fs = new FileStream(filePath, FileMode.Open, FileAccess.Read, FileShare.Read);
            var bin = new BinaryReader(fs);

            var is7090 = fs.Length == 3188736;
            var is7000 = fs.Length == 1644544;

            for (var i = 0; i < 0x4000; i++)
            {
                // header
                if (is7090)
                {
                    if (i == 1 || i > 0 && (i & 0x1F) == 0)
                        bin.ReadInt32();
                }
                else if ((i & 0x1F) == 0)
                {
                    bin.ReadInt32();
                }

                var flags = (TileFlag)(is7090 ? bin.ReadInt64() : bin.ReadInt32());
                bin.ReadInt16(); // skip 2 bytes -- textureID

                LandTable[i] = new LandData(ReadNameString(bin), flags);
            }

            var length = is7090 ? 0x10000 :
                is7000 ? 0x8000 : 0x4000;

            for (var i = 0; i < length; i++)
            {
                if ((i & 0x1F) == 0) bin.ReadInt32(); // header

                var flags = (TileFlag)(is7090 ? bin.ReadInt64() : bin.ReadInt32());
                int weight = bin.ReadByte();
                int quality = bin.ReadByte();
                bin.ReadInt16();
                bin.ReadByte();
                int quantity = bin.ReadByte();
                bin.ReadInt32();
                bin.ReadByte();
                int value = bin.ReadByte();
                int height = bin.ReadByte();

                ItemTable[i] = new ItemData(
                    ReadNameString(bin),
                    flags,
                    weight,
                    quality,
                    quantity,
                    value,
                    height
                );
            }

            MaxLandValue = LandTable.Length - 1;
            MaxItemValue = ItemTable.Length - 1;
        }

        public static LandData[] LandTable { get; }

        public static ItemData[] ItemTable { get; }

        public static int MaxLandValue { get; }

        public static int MaxItemValue { get; }

        private static string ReadNameString(BinaryReader bin)
        {
            bin.Read(m_StringBuffer, 0, 20);

            var count = 0;

            while (count < 20)
            {
                if (m_StringBuffer[count] == 0)
                    break;

                count++;
            }

            return Encoding.ASCII.GetString(new ReadOnlySpan<byte>(m_StringBuffer, 0, count));
        }
    }
}