EightBitNet/LR35902/ObjectAttribute.cs

// <copyright file="ObjectAttribute.cs" company="Adrian Conlon">
// Copyright (c) Adrian Conlon. All rights reserved.
// </copyright>
namespace EightBit
{
    namespace GameBoy
    {
        public class ObjectAttribute
        {
            public ObjectAttribute()
            {
            }

			public ObjectAttribute(Ram ram, ushort address)
            {
                this.PositionY = ram.Peek(address);
                this.PositionX = ram.Peek(++address);
                this.Pattern = ram.Peek(++address);
                this.Flags = ram.Peek(++address);
            }

            public byte PositionY { get; }
            public byte PositionX { get; }
            public byte Pattern { get; }
            public byte Flags { get; }

            public int Priority => this.Flags & (byte)Bits.Bit7;

            public bool HighPriority => this.Priority != 0;

            public bool LowPriority => this.Priority == 0;

            public bool FlipY => (this.Flags & (byte)Bits.Bit6) != 0;

            public bool FlipX => (this.Flags & (byte)Bits.Bit5) != 0;

            public int Palette => (this.Flags & (byte)Bits.Bit4) >> 3;  // TODO: Check this!
        }
    }
}