using System;
using System.Collections.Generic;
using System.Drawing;
using System.Drawing.Imaging;
using System.IO;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using Tango.RemoteDesktop.Quantization;

namespace Tango.RemoteDesktop.Encoders
{
    public class Png8BitEncoder : FrameEncoder
    {
        public Png8BitEncoder(IFrame frame) : base(frame)
        {
        }

        public override MemoryStream ToStream()
        {
            MemoryStream ms = new MemoryStream();
            var quantizer = new OctreeQuantizer(256, true);
            var quantized = quantizer.Quantize(Frame.ToBitmap());

            ImageCodecInfo icf = GetEncoder(ImageFormat.Png);
            EncoderParameters parms = new EncoderParameters(1);
            EncoderParameter parm = new EncoderParameter(System.Drawing.Imaging.Encoder.ColorDepth, 8);
            parms.Param[0] = parm;
            quantized.Save(ms, icf, parms);

            ms.Position = 0;
            quantized.Dispose();

            return ms;
        }
    }
}