Convert .Net Bitmap() to MagickImage

Question

An upgrade from ImageMagick 7.17 to 7.22.2.1 NuGet results in the following error on the constructor of a MagickImage. I can't put my finger on the replacement methods. Help me locate the documentation. Thank you,

Argument 1: cannot convert from 'System.Drawing.Bitmap' to 'byte[]'

Code:

var bitmap = new Bitmap(somesource);
var m = new MagickImage(bitmap);

Answer 1

Bitmap reader was moved to Magic.NET.SystemDrawing.

var m = new MagickFactory();
MagickImage image = new MagickImage(m.Image.Create(objImage));

Answer 2

I've only just started playing with this, so this may not be great code, but it has worked for me so far.

public static Bitmap ToBitmap(this IMagickImage mimg, MagickFormat fmt = MagickFormat.Png24)
{
    Bitmap bmp = null;
    using (MemoryStream ms = new MemoryStream())
    {
        mimg.Write(ms, fmt);
        ms.Position = 0;
        bmp = (Bitmap)Bitmap.FromStream(ms);
    }
    return bmp;
}
public static IMagickImage ToMagickImage(this Bitmap bmp)
{
    IMagickImage img = null;
    MagickFactory f = new MagickFactory();
    using (MemoryStream ms = new MemoryStream())
    {
        bmp.Save(ms, ImageFormat.Bmp);
        ms.Position = 0;
        img = new MagickImage(f.Image.Create(ms));
    }
    return img;
}

Some ImageMagick operations seem to require a different format when writing to the stream, so you may need to play with the fmt parameter.

Answer 3

I ended up using both answers to use my bitmaps with MagickImageCollection().

using var collection = new MagickImageCollection();

for(var frame = 0; frame < _animation.Length; frame++) {
    Bitmap        bitmap        = _animation[frame];
    Bitmap        canvas        = new Bitmap(bitmap.Width, bitmap.Height);
    MagickFactory magickFactory = new MagickFactory();

    using MemoryStream memoryStream = new MemoryStream();
    using Graphics     graphics     = Graphics.FromImage(canvas);

    graphics.FillRectangle(Brushes.Transparent, 0, 0, bitmap.Width, bitmap.Height);
    graphics.DrawImage(bitmap, new Point(0, 0));

    canvas.Save(memoryStream, ImageFormat.Png);
    canvas.Dispose();

    collection.Add(new MagickImage(magickFactory.Image.Create((Bitmap)Image.FromStream(memoryStream))));
    collection[frame].AnimationDelay = 100;

    memoryStream.Close();
}

collection.Quantize(new QuantizeSettings { Colors = 256 });
collection.Write(dialog.FileName);
collection.Dispose();

I should note that I am using Magick.NET.SystemDrawing v4.0.19 and Magick.NET-Q16-AnyCPU v11.0.0 in this project. I hope this helps for future readers.