//! \file       ImageI.cs
//! \date       Sat Sep 10 17:06:39 2016
//! \brief      ScrPlayer image format.
//
// Copyright (C) 2016 by morkt
//
// Permission is hereby granted, free of charge, to any person obtaining a copy
// of this software and associated documentation files (the "Software"), to
// deal in the Software without restriction, including without limitation the
// rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
// sell copies of the Software, and to permit persons to whom the Software is
// furnished to do so, subject to the following conditions:
//
// The above copyright notice and this permission notice shall be included in
// all copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
// FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
// IN THE SOFTWARE.
//

using System;
using System.ComponentModel.Composition;
using System.IO;
using System.Windows.Media;
using GameRes.Utility;

namespace GameRes.Formats.ScrPlayer
{
    [Export(typeof(ImageFormat))]
    public class Img2Format : ImageFormat
    {
        public override string         Tag { get { return "IMG2"; } }
        public override string Description { get { return "ScrPlayer image format"; } }
        public override uint     Signature { get { return 0x32474D49; } } // 'IMG2'

        public Img2Format ()
        {
            Extensions = new string[] { "i" };
        }

        public override ImageMetaData ReadMetaData (IBinaryStream stream)
        {
            var header = stream.ReadHeader (0x20);
            return new ImageMetaData
            {
                Width   = header.ToUInt16 (0xC),
                Height  = header.ToUInt16 (0xE),
                BPP     = header.ToUInt16 (0x10),
            };
        }

        public override ImageData Read (IBinaryStream stream, ImageMetaData info)
        {
            using (var reader = new Img2Reader (stream.AsStream, info))
            {
                reader.Unpack();
                return ImageData.Create (info, reader.Format, null, reader.Data);
            }
        }

        public override void Write (Stream file, ImageData image)
        {
            throw new System.NotImplementedException ("Img2Format.Write not implemented");
        }
    }

    internal class Img2BitStream : BitStream
    {
        public Img2BitStream (Stream file, bool leave_open = false) : base (file, leave_open)
        {
        }

        public int GetBits (byte[] table, int count)
        {
            int n = PeekBits (count);
            if (-1 == n)
                throw new EndOfStreamException();
            n *= 2;
            count = table[n];
            m_bits >>= count;
            m_cached_bits -= count;
            return table[n + 1];
        }

        public int PeekBits (int count)
        {
            while (m_cached_bits < count)
            {
                int b = m_input.ReadByte();
                if (-1 == b)
                    return -1;
                m_bits |= b << m_cached_bits;
                m_cached_bits += 8;
            }
            return m_bits & ((1 << count) - 1);
        }
    }

    internal sealed class Img2Reader : IDisposable
    {
        Img2BitStream   m_input;
        byte[]          m_output;
        int             m_width;
        int             m_height;
        int             m_stride;
        bool            m_has_alpha;

        public byte[]        Data { get { return m_output; } }
        public PixelFormat Format { get; private set; }

        public Img2Reader (Stream input, ImageMetaData info)
        {
            m_input = new Img2BitStream (input, true);
            m_width = (int)info.Width;
            m_height = (int)info.Height;
            m_stride = m_width * 4;
            m_output = new byte[m_stride * m_height];
            m_has_alpha = 32 == info.BPP;
            Format = m_has_alpha ? PixelFormats.Bgra32 : PixelFormats.Bgr32;
        }

        public void Unpack ()
        {
            m_input.Input.Position = 0x20;
            if (m_has_alpha)
                Unpack32bpp();
            else
                Unpack24bpp();
        }

        void Unpack24bpp ()
        {
            var rows = new int[3];
            var offset_table = OffsetTable.Clone() as int[];
            for (int y = 0; y < m_height; ++y)
            {
                int dst = rows[0];
                for (int x = 0; x < m_width; )
                {
                    int ctl = m_input.GetBits (ControlTable1, 13);
                    if (0xB8 == ctl)
                        ctl += m_input.GetBits (ControlTable2, 13);

                    int pos = m_input.GetBits (PosTable24, 6) * 2;
                    int x_offset = offset_table[pos];
                    int y_offset = offset_table[pos + 1];
                    if (pos > 0)
                    {
                        offset_table[pos]   = offset_table[pos-2];
                        offset_table[pos+1] = offset_table[pos-1];
                        offset_table[pos-2] = x_offset;
                        offset_table[pos-1] = y_offset;
                    }

                    int src = rows[y_offset] + (x + x_offset) * 4;
                    if (ctl >= 0xD8)
                    {
                        int count = ctl - 0xD6;
                        Binary.CopyOverlapped (m_output, src, dst, count * 4);
                        dst += count * 4;
                        x += count;
                    }
                    else
                    {
                        for (int j = 2; j >= 0; --j)
                        {
                            byte r = RgbBits[j,ctl];
                            if (0xFD == r)
                                r = GetDelta (DeltaTable);

                            m_output[dst+j] = (byte)(m_output[src+j] - r);
                        }
                        dst += 4;
                        ++x;
                    }
                }
                rows[2] = rows[1];
                rows[1] = rows[0];
                rows[0] += m_stride;
            }
        }

        void Unpack32bpp ()
        {
            for (int i = 3; i < m_stride; i += 4)
                m_output[i] = 0xFF;
            var rows = new int[3];
            var offset_table = OffsetTable.Clone() as int[];
            for (int y = 0; y < m_height; ++y)
            {
                int dst = rows[0];
                for (int x = 0; x < m_width; )
                {
                    int ctl = m_input.GetBits (ControlTable1, 13);
                    if (0xB8 == ctl)
                        ctl += m_input.GetBits (ControlTable2, 13);

                    int t = m_input.GetBits (ControlTable32, 9) * 2;
                    int pos = PosTable32[t] * 2;
                    bool diff_alpha = PosTable32[t + 1] != 0;

                    int x_offset = offset_table[pos];
                    int y_offset = offset_table[pos + 1];
                    if (pos > 0)
                    {
                        offset_table[pos]   = offset_table[pos-2];
                        offset_table[pos+1] = offset_table[pos-1];
                        offset_table[pos-2] = x_offset;
                        offset_table[pos-1] = y_offset;
                    }

                    int src = rows[y_offset] + (x + x_offset) * 4;
                    if (ctl >= 0xD8)
                    {
                        int count = ctl - 0xD6;
                        Binary.CopyOverlapped (m_output, src, dst, count * 4);
                        dst += count * 4;
                        x += count;
                    }
                    else
                    {
                        for (int j = 2; j >= 0; --j)
                        {
                            byte r = RgbBits[j,ctl];
                            if (0xFD == r)
                                r = GetDelta (DeltaTable);

                            m_output[dst+j] = (byte)(m_output[src+j] - r);
                        }
                        byte alpha = 0;
                        if (diff_alpha)
                            alpha = GetDelta (AlphaTable);

                        m_output[dst+3] = (byte)(m_output[src+3] - alpha);
                        dst += 4;
                        ++x;
                    }
                }
                rows[2] = rows[1];
                rows[1] = rows[0];
                rows[0] += m_stride;
            }
        }

        byte GetDelta (byte[] table)
        {
            int delta = m_input.GetBits (ColorBitsTable1, 10);
            if (0x41 == delta)
                delta += m_input.GetBits (ColorBitsTable2, 10);
            return table[delta];
        }

        static byte[] LoadResource (string name)
        {
            var type = typeof(Img2Reader);
            var assembly = type.Assembly;
            using (var stream = assembly.GetManifestResourceStream (type.Namespace+'.'+name))
            {
                if (null == stream)
                    return null;
                var data = new byte[stream.Length];
                stream.Read (data, 0, data.Length);
                return data;
            }
        }

        #region IDisposable Members
        bool _disposed = false;
        public void Dispose ()
        {
            if (!_disposed)
            {
                m_input.Dispose();
                _disposed = true;
            }
        }
        #endregion

        #region Bitmap tables
        static readonly Lazy<byte[]> s_control_table1 = new Lazy<byte[]> (() => LoadResource ("ControlTable1"));
        static readonly Lazy<byte[]> s_control_table2 = new Lazy<byte[]> (() => LoadResource ("ControlTable2"));
        static readonly Lazy<byte[]> s_control_table32 = new Lazy<byte[]> (() => LoadResource ("ControlTable32"));
        static readonly Lazy<byte[]> s_color_bits1 = new Lazy<byte[]> (() => LoadResource ("ColorBitsTable1"));
        static readonly Lazy<byte[]> s_color_bits2 = new Lazy<byte[]> (() => LoadResource ("ColorBitsTable2"));

        static byte[] ControlTable1   { get { return s_control_table1.Value; } }
        static byte[] ControlTable2   { get { return s_control_table2.Value; } }
        static byte[] ControlTable32  { get { return s_control_table32.Value; } }
        static byte[] ColorBitsTable1 { get { return s_color_bits1.Value; } }
        static byte[] ColorBitsTable2 { get { return s_color_bits2.Value; } }

        static readonly byte[] PosTable24 = {
            0x01, 0x00, 0x06, 0x07, 0x01, 0x00, 0x06, 0x09, 0x01, 0x00, 0x03, 0x01, 0x01, 0x00, 0x03, 0x02,
            0x01, 0x00, 0x04, 0x03, 0x01, 0x00, 0x04, 0x04, 0x01, 0x00, 0x03, 0x01, 0x01, 0x00, 0x03, 0x02,
            0x01, 0x00, 0x05, 0x05, 0x01, 0x00, 0x05, 0x06, 0x01, 0x00, 0x03, 0x01, 0x01, 0x00, 0x03, 0x02,
            0x01, 0x00, 0x04, 0x03, 0x01, 0x00, 0x04, 0x04, 0x01, 0x00, 0x03, 0x01, 0x01, 0x00, 0x03, 0x02,
            0x01, 0x00, 0x06, 0x08, 0x01, 0x00, 0x06, 0x0A, 0x01, 0x00, 0x03, 0x01, 0x01, 0x00, 0x03, 0x02,
            0x01, 0x00, 0x04, 0x03, 0x01, 0x00, 0x04, 0x04, 0x01, 0x00, 0x03, 0x01, 0x01, 0x00, 0x03, 0x02,
            0x01, 0x00, 0x05, 0x05, 0x01, 0x00, 0x05, 0x06, 0x01, 0x00, 0x03, 0x01, 0x01, 0x00, 0x03, 0x02,
            0x01, 0x00, 0x04, 0x03, 0x01, 0x00, 0x04, 0x04, 0x01, 0x00, 0x03, 0x01, 0x01, 0x00, 0x03, 0x02,
        };
        static readonly int[] PosTable32 = {
            0, 0, 1, 0, 2, 0, 3, 0, 4, 0, 5, 0, 6, 0, 7, 0, 8, 0, 9, 0, 10, 0,
            0, 1, 1, 1, 2, 1, 3, 1, 4, 1, 5, 1, 6, 1, 7, 1, 8, 1, 9, 1, 10, 1
        };
        static readonly byte[] DeltaTable = {
            0x03, 0xFD, 0x04, 0xFC, 0x05, 0xFB, 0x06, 0xFA, 0x07, 0xF9, 0x08, 0xF8, 0x09, 0xF7, 0x0A, 0xF6,
            0x0B, 0xF5, 0x0C, 0xF4, 0x0D, 0xF3, 0x0E, 0xF2, 0x0F, 0xF1, 0x10, 0xF0, 0x11, 0xEF, 0x12, 0xEE,
            0x13, 0xED, 0x14, 0xEC, 0x15, 0xEB, 0x16, 0xEA, 0x17, 0xE9, 0x18, 0xE8, 0x19, 0xE7, 0x1A, 0xE6,
            0x1B, 0xE5, 0x1C, 0xE4, 0x1D, 0xE3, 0x1E, 0xE2, 0x1F, 0xE1, 0x20, 0xE0, 0x21, 0xDF, 0x22, 0xDE,
            0x23, 0xDD, 0x24, 0xDC, 0x25, 0xDB, 0x26, 0xDA, 0x27, 0xD9, 0x28, 0xD8, 0x29, 0xD7, 0x2A, 0xD6,
            0x2B, 0xD5, 0x2C, 0xD4, 0x2D, 0xD3, 0x2E, 0xD2, 0x2F, 0xD1, 0x30, 0xD0, 0x31, 0xCF, 0x32, 0xCE,
            0x33, 0xCD, 0x34, 0xCC, 0x35, 0xCB, 0x36, 0xCA, 0x37, 0xC9, 0x38, 0xC8, 0x39, 0xC7, 0x3A, 0xC6,
            0x3B, 0xC5, 0x3C, 0xC4, 0x3D, 0xC3, 0x3E, 0xC2, 0x3F, 0xC1, 0x40, 0xC0, 0x41, 0xBF, 0x42, 0xBE,
            0x43, 0xBD, 0x44, 0xBC, 0x45, 0xBB, 0x46, 0xBA, 0x47, 0xB9, 0x48, 0xB8, 0x49, 0xB7, 0x4A, 0xB6,
            0x4B, 0xB5, 0x4C, 0xB4, 0x4D, 0xB3, 0x4E, 0xB2, 0x4F, 0xB1, 0x50, 0xB0, 0x51, 0xAF, 0x52, 0xAE,
            0x53, 0xAD, 0x54, 0xAC, 0x55, 0xAB, 0x56, 0xAA, 0x57, 0xA9, 0x58, 0xA8, 0x59, 0xA7, 0x5A, 0xA6,
            0x5B, 0xA5, 0x5C, 0xA4, 0x5D, 0xA3, 0x5E, 0xA2, 0x5F, 0xA1, 0x60, 0xA0, 0x61, 0x9F, 0x62, 0x9E,
            0x63, 0x9D, 0x64, 0x9C, 0x65, 0x9B, 0x66, 0x9A, 0x67, 0x99, 0x68, 0x98, 0x69, 0x97, 0x6A, 0x96,
            0x6B, 0x95, 0x6C, 0x94, 0x6D, 0x93, 0x6E, 0x92, 0x6F, 0x91, 0x70, 0x90, 0x71, 0x8F, 0x72, 0x8E,
            0x73, 0x8D, 0x74, 0x8C, 0x75, 0x8B, 0x76, 0x8A, 0x77, 0x89, 0x78, 0x88, 0x79, 0x87, 0x7A, 0x86,
            0x7B, 0x85, 0x7C, 0x84, 0x7D, 0x83, 0x7E, 0x82, 0x7F, 0x81, 0x80, 0x00, 0x00, 0x00, 0x00, 0x00,
        };
        static readonly byte[] AlphaTable = {
            0x01, 0xFF, 0x02, 0xFE, 0x03, 0xFD, 0x04, 0xFC, 0x05, 0xFB, 0x06, 0xFA, 0x07, 0xF9, 0x08, 0xF8,
            0x09, 0xF7, 0x0A, 0xF6, 0x0B, 0xF5, 0x0C, 0xF4, 0x0D, 0xF3, 0x0E, 0xF2, 0x0F, 0xF1, 0x10, 0xF0,
            0x11, 0xEF, 0x12, 0xEE, 0x13, 0xED, 0x14, 0xEC, 0x15, 0xEB, 0x16, 0xEA, 0x17, 0xE9, 0x18, 0xE8,
            0x19, 0xE7, 0x1A, 0xE6, 0x1B, 0xE5, 0x1C, 0xE4, 0x1D, 0xE3, 0x1E, 0xE2, 0x1F, 0xE1, 0x20, 0xE0,
            0x21, 0xDF, 0x22, 0xDE, 0x23, 0xDD, 0x24, 0xDC, 0x25, 0xDB, 0x26, 0xDA, 0x27, 0xD9, 0x28, 0xD8,
            0x29, 0xD7, 0x2A, 0xD6, 0x2B, 0xD5, 0x2C, 0xD4, 0x2D, 0xD3, 0x2E, 0xD2, 0x2F, 0xD1, 0x30, 0xD0,
            0x31, 0xCF, 0x32, 0xCE, 0x33, 0xCD, 0x34, 0xCC, 0x35, 0xCB, 0x36, 0xCA, 0x37, 0xC9, 0x38, 0xC8,
            0x39, 0xC7, 0x3A, 0xC6, 0x3B, 0xC5, 0x3C, 0xC4, 0x3D, 0xC3, 0x3E, 0xC2, 0x3F, 0xC1, 0x40, 0xC0,
            0x41, 0xBF, 0x42, 0xBE, 0x43, 0xBD, 0x44, 0xBC, 0x45, 0xBB, 0x46, 0xBA, 0x47, 0xB9, 0x48, 0xB8,
            0x49, 0xB7, 0x4A, 0xB6, 0x4B, 0xB5, 0x4C, 0xB4, 0x4D, 0xB3, 0x4E, 0xB2, 0x4F, 0xB1, 0x50, 0xB0,
            0x51, 0xAF, 0x52, 0xAE, 0x53, 0xAD, 0x54, 0xAC, 0x55, 0xAB, 0x56, 0xAA, 0x57, 0xA9, 0x58, 0xA8,
            0x59, 0xA7, 0x5A, 0xA6, 0x5B, 0xA5, 0x5C, 0xA4, 0x5D, 0xA3, 0x5E, 0xA2, 0x5F, 0xA1, 0x60, 0xA0,
            0x61, 0x9F, 0x62, 0x9E, 0x63, 0x9D, 0x64, 0x9C, 0x65, 0x9B, 0x66, 0x9A, 0x67, 0x99, 0x68, 0x98,
            0x69, 0x97, 0x6A, 0x96, 0x6B, 0x95, 0x6C, 0x94, 0x6D, 0x93, 0x6E, 0x92, 0x6F, 0x91, 0x70, 0x90,
            0x71, 0x8F, 0x72, 0x8E, 0x73, 0x8D, 0x74, 0x8C, 0x75, 0x8B, 0x76, 0x8A, 0x77, 0x89, 0x78, 0x88,
            0x79, 0x87, 0x7A, 0x86, 0x7B, 0x85, 0x7C, 0x84, 0x7D, 0x83, 0x7E, 0x82, 0x7F, 0x81, 0x80, 0x00,
        };
        static readonly byte[,] RgbBits = {
            {
                0xFD, 0xFE, 0xFF, 0x00, 0x01, 0x02, 0xFD, 0xFE, 0xFF, 0x00, 0x01, 0x02, 0xFD, 0xFE, 0xFF, 0x00,
                0x01, 0x02, 0xFD, 0xFE, 0xFF, 0x00, 0x01, 0x02, 0xFD, 0xFE, 0xFF, 0x00, 0x01, 0x02, 0xFD, 0xFE,
                0xFF, 0x00, 0x01, 0x02, 0xFD, 0xFE, 0xFF, 0x00, 0x01, 0x02, 0xFD, 0xFE, 0xFF, 0x00, 0x01, 0x02,
                0xFD, 0xFE, 0xFF, 0x00, 0x01, 0x02, 0xFD, 0xFE, 0xFF, 0x00, 0x01, 0x02, 0xFD, 0xFE, 0xFF, 0x00,
                0x01, 0x02, 0xFD, 0xFE, 0xFF, 0x00, 0x01, 0x02, 0xFD, 0xFE, 0xFF, 0x00, 0x01, 0x02, 0xFD, 0xFE,
                0xFF, 0x00, 0x01, 0x02, 0xFD, 0xFE, 0xFF, 0x00, 0x01, 0x02, 0xFD, 0xFE, 0xFF, 0x00, 0x01, 0x02,
                0xFD, 0xFE, 0xFF, 0x00, 0x01, 0x02, 0xFD, 0xFE, 0xFF, 0x00, 0x01, 0x02, 0xFD, 0xFE, 0xFF, 0x00,
                0x01, 0x02, 0xFD, 0xFE, 0xFF, 0x00, 0x01, 0x02, 0xFD, 0xFE, 0xFF, 0x00, 0x01, 0x02, 0xFD, 0xFE,
                0xFF, 0x00, 0x01, 0x02, 0xFD, 0xFE, 0xFF, 0x00, 0x01, 0x02, 0xFD, 0xFE, 0xFF, 0x00, 0x01, 0x02,
                0xFD, 0xFE, 0xFF, 0x00, 0x01, 0x02, 0xFD, 0xFE, 0xFF, 0x00, 0x01, 0x02, 0xFD, 0xFE, 0xFF, 0x00,
                0x01, 0x02, 0xFD, 0xFE, 0xFF, 0x00, 0x01, 0x02, 0xFD, 0xFE, 0xFF, 0x00, 0x01, 0x02, 0xFD, 0xFE,
                0xFF, 0x00, 0x01, 0x02, 0xFD, 0xFE, 0xFF, 0x00, 0x01, 0x02, 0xFD, 0xFE, 0xFF, 0x00, 0x01, 0x02,
                0xFD, 0xFE, 0xFF, 0x00, 0x01, 0x02, 0xFD, 0xFE, 0xFF, 0x00, 0x01, 0x02, 0xFD, 0xFE, 0xFF, 0x00,
                0x01, 0x02, 0xFD, 0xFE, 0xFF, 0x00, 0x01, 0x02,
            },
            {
                0xFD, 0xFD, 0xFD, 0xFD, 0xFD, 0xFD, 0xFE, 0xFE, 0xFE, 0xFE, 0xFE, 0xFE, 0xFF, 0xFF, 0xFF, 0xFF,
                0xFF, 0xFF, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x02, 0x02,
                0x02, 0x02, 0x02, 0x02, 0xFD, 0xFD, 0xFD, 0xFD, 0xFD, 0xFD, 0xFE, 0xFE, 0xFE, 0xFE, 0xFE, 0xFE,
                0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x01, 0x01, 0x01, 0x01,
                0x01, 0x01, 0x02, 0x02, 0x02, 0x02, 0x02, 0x02, 0xFD, 0xFD, 0xFD, 0xFD, 0xFD, 0xFD, 0xFE, 0xFE,
                0xFE, 0xFE, 0xFE, 0xFE, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
                0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x02, 0x02, 0x02, 0x02, 0x02, 0x02, 0xFD, 0xFD, 0xFD, 0xFD,
                0xFD, 0xFD, 0xFE, 0xFE, 0xFE, 0xFE, 0xFE, 0xFE, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0x00, 0x00,
                0x00, 0x00, 0x00, 0x00, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x02, 0x02, 0x02, 0x02, 0x02, 0x02,
                0xFD, 0xFD, 0xFD, 0xFD, 0xFD, 0xFD, 0xFE, 0xFE, 0xFE, 0xFE, 0xFE, 0xFE, 0xFF, 0xFF, 0xFF, 0xFF,
                0xFF, 0xFF, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x02, 0x02,
                0x02, 0x02, 0x02, 0x02, 0xFD, 0xFD, 0xFD, 0xFD, 0xFD, 0xFD, 0xFE, 0xFE, 0xFE, 0xFE, 0xFE, 0xFE,
                0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x01, 0x01, 0x01, 0x01,
                0x01, 0x01, 0x02, 0x02, 0x02, 0x02, 0x02, 0x02,
            },
            {
                0xFD, 0xFD, 0xFD, 0xFD, 0xFD, 0xFD, 0xFD, 0xFD, 0xFD, 0xFD, 0xFD, 0xFD, 0xFD, 0xFD, 0xFD, 0xFD,
                0xFD, 0xFD, 0xFD, 0xFD, 0xFD, 0xFD, 0xFD, 0xFD, 0xFD, 0xFD, 0xFD, 0xFD, 0xFD, 0xFD, 0xFD, 0xFD,
                0xFD, 0xFD, 0xFD, 0xFD, 0xFE, 0xFE, 0xFE, 0xFE, 0xFE, 0xFE, 0xFE, 0xFE, 0xFE, 0xFE, 0xFE, 0xFE,
                0xFE, 0xFE, 0xFE, 0xFE, 0xFE, 0xFE, 0xFE, 0xFE, 0xFE, 0xFE, 0xFE, 0xFE, 0xFE, 0xFE, 0xFE, 0xFE,
                0xFE, 0xFE, 0xFE, 0xFE, 0xFE, 0xFE, 0xFE, 0xFE, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF,
                0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF,
                0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0x00, 0x00, 0x00, 0x00,
                0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
                0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
                0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01,
                0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01,
                0x01, 0x01, 0x01, 0x01, 0x02, 0x02, 0x02, 0x02, 0x02, 0x02, 0x02, 0x02, 0x02, 0x02, 0x02, 0x02,
                0x02, 0x02, 0x02, 0x02, 0x02, 0x02, 0x02, 0x02, 0x02, 0x02, 0x02, 0x02, 0x02, 0x02, 0x02, 0x02,
                0x02, 0x02, 0x02, 0x02, 0x02, 0x02, 0x02, 0x02,
            }
        };
        static readonly int[] OffsetTable = {
            -1, 0, 0, 1, 1, 1, -1, 1, 2, 1, -2, 1, -2, 0, 0, 2, 1, 2, -1, 2, -3, 0,
        };
        #endregion
    }
}
