UVtools/UVtools.Core/FileFormats/CXDLPv1File.cs

/*
 *                     GNU AFFERO GENERAL PUBLIC LICENSE
 *                       Version 3, 19 November 2007
 *  Copyright (C) 2007 Free Software Foundation, Inc. <https://fsf.org/>
 *  Everyone is permitted to copy and distribute verbatim copies
 *  of this license document, but changing it is not allowed.
 */

using BinarySerialization;
using Emgu.CV;
using Emgu.CV.Structure;
using System;
using System.Collections.Generic;
using System.Diagnostics;
using System.Drawing;
using System.Globalization;
using System.IO;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using UVtools.Core.Extensions;
using UVtools.Core.Layers;
using UVtools.Core.Operations;

namespace UVtools.Core.FileFormats;

public class CXDLPv1File : FileFormat
{
    #region Constants
    private const byte HEADER_SIZE = 9; // CXSW3DV2
    private const string HEADER_VALUE = "CXSW3DV2";
    #endregion

    #region Sub Classes
    #region Header
    public sealed class Header
    {
        /// <summary>
        /// Gets the size of the header
        /// </summary>
        [FieldOrder(0)]
        [FieldEndianness(Endianness.Big)]
        public uint HeaderSize { get; set; } = HEADER_SIZE;

        /// <summary>
        /// Gets the header name
        /// </summary>
        [FieldOrder(1)]
        [FieldLength(HEADER_SIZE)]
        [SerializeAs(SerializedType.TerminatedString)]
        public string HeaderValue { get; set; } = HEADER_VALUE;

        /// <summary>
        /// Gets the number of records in the layer table
        /// </summary>
        [FieldOrder(2)]
        [FieldEndianness(Endianness.Big)]
        public ushort LayerCount { get; set; }

        /// <summary>
        /// Gets the printer resolution along X axis, in pixels. This information is critical to correctly decoding layer images.
        /// </summary>
        [FieldOrder(3)]
        [FieldEndianness(Endianness.Big)]
        public ushort ResolutionX { get; set; }

        /// <summary>
        /// Gets the printer resolution along Y axis, in pixels. This information is critical to correctly decoding layer images.
        /// </summary>
        [FieldOrder(4)]
        [FieldEndianness(Endianness.Big)]
        public ushort ResolutionY { get; set; }

        public void Validate()
        {
            if (HeaderSize != HEADER_SIZE || HeaderValue != HEADER_VALUE)
            {
                throw new FileLoadException("Not a valid CXDLP file!");
            }
        }

        public override string ToString()
        {
            return $"{nameof(HeaderSize)}: {HeaderSize}, {nameof(HeaderValue)}: {HeaderValue}, {nameof(LayerCount)}: {LayerCount}, {nameof(ResolutionX)}: {ResolutionX}, {nameof(ResolutionY)}: {ResolutionY}";
        }
    }

    #endregion

    #region SlicerInfo
    // Address: 363407
    public sealed class SlicerInfo
    {
        [FieldOrder(0)]
        [FieldEndianness(Endianness.Big)]
        public uint DisplayWidthDataSize { get; set; } = 20;

        [FieldOrder(1)]
        [FieldLength(nameof(DisplayWidthDataSize))]
        public byte[] DisplayWidthBytes { get; set; } = null!;

        [FieldOrder(2)]
        [FieldEndianness(Endianness.Big)]
        public uint DisplayHeightDataSize { get; set; } = 20;

        [FieldOrder(3)]
        [FieldLength(nameof(DisplayHeightDataSize))]
        public byte[] DisplayHeightBytes { get; set; } = null!;

        [FieldOrder(4)]
        [FieldEndianness(Endianness.Big)]
        public uint LayerHeightDataSize { get; set; } = 16;

        [FieldOrder(5)]
        [FieldLength(nameof(LayerHeightDataSize))]
        public byte[] LayerHeightBytes { get; set; } = null!;

        [FieldOrder(6)]
        [FieldEndianness(Endianness.Big)]
        public ushort WaitTimeBeforeCure { get; set; }

        [FieldOrder(7)]
        [FieldEndianness(Endianness.Big)]
        public ushort ExposureTime { get; set; }

        [FieldOrder(8)]
        [FieldEndianness(Endianness.Big)]
        public ushort BottomExposureTime { get; set; }

        [FieldOrder(9)]
        [FieldEndianness(Endianness.Big)]
        public ushort BottomLayersCount { get; set; }

        [FieldOrder(10)]
        [FieldEndianness(Endianness.Big)]
        public ushort BottomLiftHeight { get; set; }

        [FieldOrder(11)]
        [FieldEndianness(Endianness.Big)]
        public ushort BottomLiftSpeed { get; set; }

        [FieldOrder(12)]
        [FieldEndianness(Endianness.Big)]
        public ushort LiftHeight { get; set; }

        [FieldOrder(13)]
        [FieldEndianness(Endianness.Big)]
        public ushort LiftSpeed { get; set; }

        [FieldOrder(14)]
        [FieldEndianness(Endianness.Big)]
        public ushort RetractSpeed { get; set; }

        [FieldOrder(15)]
        [FieldEndianness(Endianness.Big)]
        public ushort BottomLightPWM { get; set; } = 255;

        [FieldOrder(16)]
        [FieldEndianness(Endianness.Big)]
        public ushort LightPWM { get; set; } = 255;

        public override string ToString()
        {
            return $"{nameof(DisplayWidthDataSize)}: {DisplayWidthDataSize}, {nameof(DisplayWidthBytes)}: {DisplayWidthBytes}, {nameof(DisplayHeightDataSize)}: {DisplayHeightDataSize}, {nameof(DisplayHeightBytes)}: {DisplayHeightBytes}, {nameof(LayerHeightDataSize)}: {LayerHeightDataSize}, {nameof(LayerHeightBytes)}: {LayerHeightBytes}, {nameof(ExposureTime)}: {ExposureTime}, {nameof(WaitTimeBeforeCure)}: {WaitTimeBeforeCure}, {nameof(BottomExposureTime)}: {BottomExposureTime}, {nameof(BottomLayersCount)}: {BottomLayersCount}, {nameof(BottomLiftHeight)}: {BottomLiftHeight}, {nameof(BottomLiftSpeed)}: {BottomLiftSpeed}, {nameof(LiftHeight)}: {LiftHeight}, {nameof(LiftSpeed)}: {LiftSpeed}, {nameof(RetractSpeed)}: {RetractSpeed}, {nameof(BottomLightPWM)}: {BottomLightPWM}, {nameof(LightPWM)}: {LightPWM}";
        }
    }
    #endregion

    #region Layer Def

    public sealed class PreLayer
    {
        [FieldOrder(0)]
        [FieldEndianness(Endianness.Big)]
        public uint Unknown { get; set; }

        public PreLayer()
        {
        }

        public PreLayer(uint unknown)
        {
            Unknown = unknown;
        }
    }

    public sealed class LayerDef
    {
        public static byte[] GetHeaderBytes(uint unknown, uint lineCount)
        {
            var bytes = new byte[8];
            BitExtensions.ToBytesBigEndian(unknown, bytes);
            BitExtensions.ToBytesBigEndian(lineCount, bytes, 4);
            return bytes;
        }

        [FieldOrder(0)] [FieldEndianness(Endianness.Big)] public uint Unknown { get; set; }
        [FieldOrder(1)] [FieldEndianness(Endianness.Big)] public uint LineCount { get; set; }
        [FieldOrder(2)] [FieldCount(nameof(LineCount))] public LayerLine[] Lines { get; set; } = Array.Empty<LayerLine>();
        [FieldOrder(3)] public PageBreak PageBreak { get; set; } = new();

        public LayerDef() { }

        public LayerDef(uint unknown, uint lineCount, LayerLine[] lines)
        {
            Unknown = unknown;
            LineCount = lineCount;
            Lines = lines;
        }
    }

    public sealed class LayerLine
    {
        public const byte CoordinateCount = 5;
        [FieldOrder(0)] [FieldCount(CoordinateCount)] public byte[] Coordinates { get; set; } = new byte[CoordinateCount];
        //[FieldOrder(0)] [FieldEndianness(Endianness.Big)] [FieldBitLength(13)] public ushort StartY { get; set; }
        //[FieldOrder(1)] [FieldEndianness(Endianness.Big)] [FieldBitLength(13)] public ushort EndY { get; set; }
        //[FieldOrder(2)] [FieldEndianness(Endianness.Big)] [FieldBitLength(14)] public ushort StartX { get; set; }
        [FieldOrder(1)] public byte Gray { get; set; }

        [Ignore] public ushort StartY => (ushort)((((Coordinates[0] << 8) + Coordinates[1]) >> 3) & 0x1FFF); // 13 bits

        [Ignore] public ushort EndY => (ushort)((((Coordinates[1] << 16) + (Coordinates[2] << 8) + Coordinates[3]) >> 6) & 0x1FFF); // 13 bits

        [Ignore] public ushort StartX => (ushort)(((Coordinates[3] << 8) + Coordinates[4]) & 0x3FFF); // 14 bits
        [Ignore] public ushort Length => (ushort)(EndY - StartY);

        public static byte[] GetBytes(ushort startY, ushort endY, ushort startX, byte gray)
        {
            var bytes = new byte[CoordinateCount + 1];
            bytes[0] = (byte)((startY >> 5) & 0xFF);
            bytes[1] = (byte)(((startY << 3) + (endY >> 10)) & 0xFF);
            bytes[2] = (byte)((endY >> 2) & 0xFF);
            bytes[3] = (byte)(((endY << 6) + (startX >> 8)) & 0xFF);
            bytes[4] = (byte)startX;
            bytes[5] = gray;
            return bytes;
        }

        public LayerLine() { }

        public LayerLine(ushort startY, ushort endY, ushort startX, byte gray)
        {
            Coordinates[0] = (byte)((startY >> 5) & 0xFF);
            Coordinates[1] = (byte)(((startY << 3) + (endY >> 10)) & 0xFF);
            Coordinates[2] = (byte)((endY >> 2) & 0xFF);
            Coordinates[3] = (byte)(((endY << 6) + (startX >> 8)) & 0xFF);
            Coordinates[4] = (byte)startX;
            /*StartY = startY;
            EndY = endY;
            StartX = startX;*/
            Gray = gray;
        }

        public override string ToString()
        {
            return $"{nameof(Gray)}: {Gray}, {nameof(StartY)}: {StartY}, {nameof(EndY)}: {EndY}, {nameof(StartX)}: {StartX}, {nameof(Length)}: {Length}";
        }
    }

    public sealed class PageBreak
    {
        public static byte[] Bytes => new byte[] { 0x0D, 0x0A };

        [FieldOrder(0)] public byte Line { get; set; } = 0x0D;
        [FieldOrder(1)] public byte Break { get; set; } = 0x0A;
    }

    #endregion

    #region Footer
    public sealed class Footer
    {
        /// <summary>
        /// Gets the size of the header
        /// </summary>
        [FieldOrder(0)]
        [FieldEndianness(Endianness.Big)]
        public uint FooterSize { get; set; } = HEADER_SIZE;

        /// <summary>
        /// Gets the header name
        /// </summary>
        [FieldOrder(1)]
        [FieldLength(HEADER_SIZE)]
        [SerializeAs(SerializedType.TerminatedString)]
        public string FooterValue { get; set; } = HEADER_VALUE;

        [FieldOrder(2)]
        [FieldEndianness(Endianness.Big)]
        public uint Unknown { get; set; } = 7;

        public void Validate()
        {
            if (FooterSize != HEADER_SIZE || FooterValue != HEADER_VALUE)
            {
                throw new FileLoadException("Not a valid CXDLP file!");
            }
        }
    }
    #endregion

    #endregion

    #region Properties

    public Header HeaderSettings { get; protected internal set; } = new();
    public SlicerInfo SlicerInfoSettings { get; protected internal set; } = new();
    public Footer FooterSettings { get; protected internal set; } = new();

    public override FileFormatType FileType => FileFormatType.Binary;

    public override FileExtension[] FileExtensions { get; } = {
        new(typeof(CXDLPv1File), "v1.cxdlp", "Creality CXDLP v1"),
    };

    public override PrintParameterModifier[]? PrintParameterModifiers { get; } =
    {
        PrintParameterModifier.BottomLayerCount,

        PrintParameterModifier.WaitTimeBeforeCure,

        PrintParameterModifier.BottomExposureTime,
        PrintParameterModifier.ExposureTime,

        PrintParameterModifier.BottomLiftHeight,
        PrintParameterModifier.BottomLiftSpeed,
        PrintParameterModifier.LiftHeight,
        PrintParameterModifier.LiftSpeed,
        PrintParameterModifier.RetractSpeed,

        PrintParameterModifier.BottomLightPWM,
        PrintParameterModifier.LightPWM,
    };

    public override Size[]? ThumbnailsOriginalSize { get; } =
    {
        new(116, 116),
        new(290, 290),
        new(290, 290)
    };

    public override uint ResolutionX
    {
        get => HeaderSettings.ResolutionX;
        set
        {
            HeaderSettings.ResolutionX = (ushort)value;
            RaisePropertyChanged();
        }
    }

    public override uint ResolutionY
    {
        get => HeaderSettings.ResolutionY;
        set
        {
            HeaderSettings.ResolutionY = (ushort)value;
            RaisePropertyChanged();
        }
    }

    public override float DisplayWidth
    {
        get => float.Parse(Encoding.ASCII.GetString(SlicerInfoSettings.DisplayWidthBytes.Where(b => b != 0).ToArray()));
        set
        {
            string str = Math.Round(value, 2).ToString(CultureInfo.InvariantCulture);
            SlicerInfoSettings.DisplayWidthDataSize = (uint)(str.Length * 2);
            var data = new byte[SlicerInfoSettings.DisplayWidthDataSize];
            for (var i = 0; i < str.Length; i++)
            {
                data[i * 2 + 1] = System.Convert.ToByte(str[i]);
            }

            SlicerInfoSettings.DisplayWidthBytes = data;
            RaisePropertyChanged();
        }
    }

    public override float DisplayHeight
    {
        get => float.Parse(Encoding.ASCII.GetString(SlicerInfoSettings.DisplayHeightBytes.Where(b => b != 0).ToArray()));
        set
        {
            string str = Math.Round(value, 2).ToString(CultureInfo.InvariantCulture);
            SlicerInfoSettings.DisplayHeightDataSize = (uint)(str.Length * 2);
            var data = new byte[SlicerInfoSettings.DisplayHeightDataSize];
            for (var i = 0; i < str.Length; i++)
            {
                data[i * 2 + 1] = System.Convert.ToByte(str[i]);
            }

            SlicerInfoSettings.DisplayHeightBytes = data;
            RaisePropertyChanged();
        }
    }

    public override float LayerHeight
    {
        get => float.Parse(Encoding.ASCII.GetString(SlicerInfoSettings.LayerHeightBytes.Where(b => b != 0).ToArray()));
        set
        {
            string str = Layer.RoundHeight(value).ToString(CultureInfo.InvariantCulture);
            SlicerInfoSettings.LayerHeightDataSize = (uint)(str.Length * 2);
            var data = new byte[SlicerInfoSettings.LayerHeightDataSize];
            for (var i = 0; i < str.Length; i++)
            {
                data[i * 2 + 1] = System.Convert.ToByte(str[i]);
            }

            SlicerInfoSettings.LayerHeightBytes = data;
            RaisePropertyChanged();
        }
    }

    public override uint LayerCount
    {
        get => base.LayerCount;
        set => base.LayerCount = HeaderSettings.LayerCount = (ushort)base.LayerCount;
    }

    public override ushort BottomLayerCount
    {
        get => SlicerInfoSettings.BottomLayersCount;
        set => base.BottomLayerCount = SlicerInfoSettings.BottomLayersCount = value;
    }

    public override float BottomWaitTimeBeforeCure => WaitTimeBeforeCure;

    public override float WaitTimeBeforeCure
    {
        get => SlicerInfoSettings.WaitTimeBeforeCure;
        set => base.WaitTimeBeforeCure = SlicerInfoSettings.WaitTimeBeforeCure = (ushort)value;
    }

    public override float BottomExposureTime
    {
        get => SlicerInfoSettings.BottomExposureTime;
        set => base.BottomExposureTime = SlicerInfoSettings.BottomExposureTime = (ushort)value;
    }

    public override float ExposureTime
    {
        get => SlicerInfoSettings.ExposureTime;
        set => base.ExposureTime = SlicerInfoSettings.ExposureTime = (ushort)value;
    }

    public override float BottomLiftHeight
    {
        get => SlicerInfoSettings.BottomLiftHeight;
        set => base.BottomLiftHeight = SlicerInfoSettings.BottomLiftHeight = (ushort)value;
    }

    public override float LiftHeight
    {
        get => SlicerInfoSettings.LiftHeight;
        set => base.LiftHeight = SlicerInfoSettings.LiftHeight = (ushort)value;
    }

    public override float BottomLiftSpeed
    {
        get => SlicerInfoSettings.BottomLiftSpeed;
        set => base.BottomLiftSpeed = SlicerInfoSettings.BottomLiftSpeed = (ushort)value;
    }

    public override float LiftSpeed
    {
        get => SlicerInfoSettings.LiftSpeed;
        set => base.LiftSpeed = SlicerInfoSettings.LiftSpeed = (ushort)value;
    }

    public override float BottomRetractSpeed => RetractSpeed;

    public override float RetractSpeed
    {
        get => SlicerInfoSettings.RetractSpeed;
        set => base.RetractSpeed = SlicerInfoSettings.RetractSpeed = (ushort)value;
    }

    public override byte BottomLightPWM
    {
        get => (byte)SlicerInfoSettings.BottomLightPWM;
        set => base.BottomLightPWM = (byte)(SlicerInfoSettings.BottomLightPWM = value);
    }

    public override byte LightPWM
    {
        get => (byte)SlicerInfoSettings.LightPWM;
        set => base.LightPWM = (byte)(SlicerInfoSettings.LightPWM = value);
    }

    public override object[] Configs => new object[] { HeaderSettings, SlicerInfoSettings, FooterSettings };

    #endregion

    #region Constructors
    #endregion

    #region Methods

    protected override void EncodeInternally(OperationProgress progress)
    {
        using var outputFile = new FileStream(TemporaryOutputFileFullPath, FileMode.Create, FileAccess.Write);

        if (ResolutionX == 2560 && ResolutionY == 1620)
        {
            MachineName = "CL-60";
        }
        else if (ResolutionX == 3840 && ResolutionY == 2400)
        {
            MachineName = "CL-89";
        }

        var pageBreak = PageBreak.Bytes;

        Helpers.SerializeWriteFileStream(outputFile, HeaderSettings);

        var previews = new byte[ThumbnailsOriginalSize!.Length][];

        // Previews
        Parallel.For(0, previews.Length, CoreSettings.GetParallelOptions(progress), previewIndex =>
        {
            var encodeLength = ThumbnailsOriginalSize[previewIndex].Area() * 2;
            if (Thumbnails[previewIndex] is null)
            {
                previews[previewIndex] = new byte[encodeLength];
                return;
            }

            previews[previewIndex] = EncodeImage(DATATYPE_RGB565_BE, Thumbnails[previewIndex]!);

            if (encodeLength != previews[previewIndex].Length)
            {
                throw new FileLoadException($"Preview encode incomplete encode, expected: {previews[previewIndex].Length}, encoded: {encodeLength}");
            }
        });

        for (int i = 0; i < ThumbnailsOriginalSize.Length; i++)
        {
            Helpers.SerializeWriteFileStream(outputFile, previews[i]);
            outputFile.WriteBytes(pageBreak);
            previews[i] = null!;
        }
        Helpers.SerializeWriteFileStream(outputFile, SlicerInfoSettings);

        progress.Reset(OperationProgress.StatusEncodeLayers, LayerCount);
            

        for (int layerIndex = 0; layerIndex < LayerCount; layerIndex++)
        {
            outputFile.WriteBytes(BitExtensions.ToBytesBigEndian(this[layerIndex].NonZeroPixelCount));
        }
        outputFile.WriteBytes(pageBreak);

        var layerBytes = new List<byte>[LayerCount];
        foreach (var batch in BatchLayersIndexes())
        {
            Parallel.ForEach(batch, CoreSettings.GetParallelOptions(progress), layerIndex =>
            {
                var layer = this[layerIndex];
                using (var mat = layer.LayerMat)
                {
                    var span = mat.GetDataByteSpan();

                    layerBytes[layerIndex] = new();

                    uint lineCount = 0;

                    for (int x = layer.BoundingRectangle.X; x < layer.BoundingRectangle.Right; x++)
                    {
                        int y = layer.BoundingRectangle.Y;
                        int startY = -1;
                        byte lastColor = 0;
                        for (; y < layer.BoundingRectangle.Bottom; y++)
                        {
                            int pos = mat.GetPixelPos(x, y);
                            byte color = span[pos];

                            if (lastColor == color && color != 0) continue;

                            if (startY >= 0)
                            {
                                layerBytes[layerIndex].AddRange(LayerLine.GetBytes((ushort)startY, (ushort)(y - 1),
                                    (ushort)x, lastColor));
                                lineCount++;
                            }

                            startY = color == 0 ? -1 : y;

                            lastColor = color;
                        }

                        if (startY >= 0)
                        {
                            layerBytes[layerIndex].AddRange(LayerLine.GetBytes((ushort)startY, (ushort)(y - 1),
                                (ushort)x, lastColor));
                            lineCount++;
                        }
                    }

                    layerBytes[layerIndex].InsertRange(0, LayerDef.GetHeaderBytes(layer.NonZeroPixelCount, lineCount));
                    layerBytes[layerIndex].AddRange(pageBreak);
                }

                progress.LockAndIncrement();
            });

            foreach (var layerIndex in batch)
            {
                outputFile.WriteBytes(layerBytes[layerIndex].ToArray());
                layerBytes[layerIndex] = null!;
            }
        }


        Helpers.SerializeWriteFileStream(outputFile, FooterSettings);

        Debug.WriteLine("Encode Results:");
        Debug.WriteLine(HeaderSettings);
        Debug.WriteLine(SlicerInfoSettings);
        Debug.WriteLine("-End-");
    }

    protected override void DecodeInternally(OperationProgress progress)
    {
        using var inputFile = new FileStream(FileFullPath!, FileMode.Open, FileAccess.Read);
        HeaderSettings = Helpers.Deserialize<Header>(inputFile);
        HeaderSettings.Validate();

        Debug.WriteLine(HeaderSettings);

        byte[][] previews = new byte[ThumbnailsOriginalSize!.Length][];
        for (int i = 0; i < ThumbnailsOriginalSize.Length; i++)
        {
            previews[i] = new byte[ThumbnailsOriginalSize[i].Area() * 2];
            inputFile.ReadBytes(previews[i]);
            inputFile.Seek(2, SeekOrigin.Current);
        }

        Parallel.For(0, previews.Length, CoreSettings.GetParallelOptions(progress), previewIndex =>
        {
            Thumbnails[previewIndex] = DecodeImage(DATATYPE_RGB565_BE, previews[previewIndex], ThumbnailsOriginalSize[previewIndex]);
            previews[previewIndex] = null!;
        });


        SlicerInfoSettings = Helpers.Deserialize<SlicerInfo>(inputFile);
        Debug.WriteLine(SlicerInfoSettings);

        Init(HeaderSettings.LayerCount, DecodeType == FileDecodeType.Partial);
        inputFile.Seek(LayerCount * 4 + 2, SeekOrigin.Current); // Skip pre layers


        if (DecodeType == FileDecodeType.Full)
        {
            progress.Reset(OperationProgress.StatusDecodeLayers, LayerCount);
            var linesBytes = new byte[LayerCount][];
            foreach (var batch in BatchLayersIndexes())
            {
                foreach (var layerIndex in batch)
                {
                    progress.ThrowIfCancellationRequested();

                    inputFile.Seek(4, SeekOrigin.Current);
                    var lineCount = BitExtensions.ToUIntBigEndian(inputFile.ReadBytes(4));

                    linesBytes[layerIndex] = new byte[lineCount * 6];
                    inputFile.ReadBytes(linesBytes[layerIndex]);
                    inputFile.Seek(2, SeekOrigin.Current);

                }

                Parallel.ForEach(batch, CoreSettings.GetParallelOptions(progress), layerIndex =>
                {
                    using (var mat = EmguExtensions.InitMat(Resolution))
                    {
                        for (int i = 0; i < linesBytes[layerIndex].Length; i++)
                        {
                            LayerLine line = new()
                            {
                                Coordinates =
                                {
                                    [0] = linesBytes[layerIndex][i++],
                                    [1] = linesBytes[layerIndex][i++],
                                    [2] = linesBytes[layerIndex][i++],
                                    [3] = linesBytes[layerIndex][i++],
                                    [4] = linesBytes[layerIndex][i++]
                                },
                                Gray = linesBytes[layerIndex][i]
                            };

                            CvInvoke.Line(mat, new Point(line.StartX, line.StartY),
                                new Point(line.StartX, line.EndY),
                                new MCvScalar(line.Gray));
                        }

                        linesBytes[layerIndex] = null!;

                        _layers[layerIndex] = new Layer((uint)layerIndex, mat, this);
                    }

                    progress.LockAndIncrement();
                });
            }
        }
        else // Partial read
        {
            inputFile.Seek(-Helpers.Serializer.SizeOf(FooterSettings), SeekOrigin.End);
        }

        FooterSettings = Helpers.Deserialize<Footer>(inputFile);
        FooterSettings.Validate();
    }

    protected override void PartialSaveInternally(OperationProgress progress)
    {
        var offset = Helpers.Serializer.SizeOf(HeaderSettings);
        foreach (var size in ThumbnailsOriginalSize!)
        {
            offset += size.Area() * 2 + 2; // + page break
        }

        using var outputFile = new FileStream(TemporaryOutputFileFullPath, FileMode.Open, FileAccess.Write);
        outputFile.Seek(offset, SeekOrigin.Begin);
        Helpers.SerializeWriteFileStream(outputFile, SlicerInfoSettings);
    }

    #endregion
}