Investigate how will work Matrix with byte data type for handling image

[toor1245]

need check how will be work matrix with System.Drawing.Image and other image library on other OS and define the best library for cross-platform.

[Dilorfin]

MatrixDotNet can be used with imaged. As proof of concept (work with one line bmp only...):

using System.Drawing;
using System.Runtime.InteropServices;
using MatrixDotNet;
using MatrixDotNet.Extensions.Conversion;

static class ImageExt
{
    public static byte[] toByteArray(this Image imageIn)
    {
        using var ms = new MemoryStream();
        imageIn.Save(ms, imageIn.RawFormat);
        return ms.ToArray();
    }

    public static int[] toRGBAIntArray(this Image imageIn)
    {
        var bytes = imageIn.toByteArray();
        var list = bytes.Skip(54).ToList();

        for (int i = 3; i < list.Count-3; i+=4)
        {
            list.Insert(i, 0);
        }

        byte[] arr = list.ToArray();

        return MemoryMarshal.Cast<byte, int>(arr).ToArray();
    }
}

class Program
{
    static int Main()
    {
        var image = Image.FromFile(@"D:\Projects\MatrixDotNet_ImagesTest\test.bmp");

        Matrix<int> a = new Matrix<int>(1, image.Width)
        {
            [0, State.Row] = image.toRGBAIntArray()
        };

        MatrixConverter.Reverse(a);

        byte[] rgba = MemoryMarshal.Cast<int, byte>(a[0, State.Row]).ToArray();

        Console.WriteLine(a);

        foreach (var b in rgba.Where((t, i) => t != 0).ToArray())
        {
            Console.WriteLine(b);
        }

        var file = File.Create(@"D:\Projects\MatrixDotNet_ImagesTest\test1.bmp");

        file.Write(image.toByteArray().Take(54).ToArray());
        file.Write(rgba.Where((t, i) => t != 0).ToArray());
        file.WriteByte(0);
        file.Close();

        return 0;
    }
}

[Dilorfin]

In proof of concept I used int for storing RGB data, however it's obviously has limitations, i.e. we can't work colors, just shuffle pixels. Idea of using bar bytes instead of ints as for me has even more problems.

So I think should be created possibility to work with logical structs or different abstraction. And I'm not sure if it is effective way of working with images.