Penumbra/Penumbra.GameData/Structs/GmpEntry.cs

using System.IO;

namespace Penumbra.GameData.Structs
{
    public struct GmpEntry
    {
        public bool Enabled
        {
            get => ( Value & 1 ) == 1;
            set
            {
                if( value )
                {
                    Value |= 1ul;
                }
                else
                {
                    Value &= ~1ul;
                }
            }
        }

        public bool Animated
        {
            get => ( Value & 2 ) == 2;
            set
            {
                if( value )
                {
                    Value |= 2ul;
                }
                else
                {
                    Value &= ~2ul;
                }
            }
        }

        public ushort RotationA
        {
            get => ( ushort )( ( Value >> 2 ) & 0x3FF );
            set => Value = ( Value & ~0xFFCul ) | ( ( value & 0x3FFul ) << 2 );
        }

        public ushort RotationB
        {
            get => ( ushort )( ( Value >> 12 ) & 0x3FF );
            set => Value = ( Value & ~0x3FF000ul ) | ( ( value & 0x3FFul ) << 12 );
        }

        public ushort RotationC
        {
            get => ( ushort )( ( Value >> 22 ) & 0x3FF );
            set => Value = ( Value & ~0xFFC00000ul ) | ( ( value & 0x3FFul ) << 22 );
        }

        public byte UnknownA
        {
            get => ( byte )( ( Value >> 32 ) & 0x0F );
            set => Value = ( Value & ~0x0F00000000ul ) | ( ( value & 0x0Ful ) << 32 );
        }

        public byte UnknownB
        {
            get => ( byte )( ( Value >> 36 ) & 0x0F );
            set => Value = ( Value & ~0xF000000000ul ) | ( ( value & 0x0Ful ) << 36 );
        }

        public byte UnknownTotal
        {
            get => ( byte )( ( Value >> 32 ) & 0xFF );
            set => Value = ( Value & ~0xFF00000000ul ) | ( ( value & 0xFFul ) << 32 );
        }

        public ulong Value { get; set; }

        public static GmpEntry FromTexToolsMeta( byte[] data )
        {
            GmpEntry  ret    = new();
            using var reader = new BinaryReader( new MemoryStream( data ) );
            ret.Value        = reader.ReadUInt32();
            ret.UnknownTotal = data[ 4 ];
            return ret;
        }

        public static implicit operator ulong( GmpEntry entry )
            => entry.Value;

        public static explicit operator GmpEntry( ulong entry )
            => new() { Value = entry };
    }
}