using System;
using System.IO;

namespace LibAPNG
{
    public class IHDRChunk : Chunk
    {
        public IHDRChunk(byte[] chunkBytes)
            : base(chunkBytes)
        {
        }

        public IHDRChunk(MemoryStream ms)
            : base(ms)
        {
        }

        public IHDRChunk(Chunk chunk)
            : base(chunk)
        {
        }

        public int Width { get; private set; }

        public int Height { get; private set; }

        public byte BitDepth { get; private set; }

        public byte ColorType { get; private set; }

        public byte CompressionMethod { get; private set; }

        public byte FilterMethod { get; private set; }

        public byte InterlaceMethod { get; private set; }

        protected override void ParseData(MemoryStream ms)
        {
            Width = Helper.ConvertEndian(ms.ReadInt32());
            Height = Helper.ConvertEndian(ms.ReadInt32());
            BitDepth = Convert.ToByte(ms.ReadByte());
            ColorType = Convert.ToByte(ms.ReadByte());
            CompressionMethod = Convert.ToByte(ms.ReadByte());
            FilterMethod = Convert.ToByte(ms.ReadByte());
            InterlaceMethod = Convert.ToByte(ms.ReadByte());
        }
    }
}