'Image.FromStream throws Parameter is not valid error only on linux

I have some Unit Tests made in .net core that checks if the file which is uploaded from angular frontend is actually resized on the backend.

I have a service that is used in the tests, containing following method :

public byte[] ResizeImage(IFormFile formFile)
    {
        Image imgFromStream;
        using (var memStream = new MemoryStream())
        {
            formFile.CopyTo(memStream);
            memStream.Position = 0;

            Console.WriteLine("$$$$$$$ LENGTH  :" + memStream.Length);
            Console.WriteLine("$$$$$$$ CAN READ :" + memStream.CanRead);
          

   
 ->>>>>           imgFromStream = System.Drawing.Image.FromStream(memStream, false,false);

            Image thumbnail = imgFromStream.GetThumbnailImage(280, 90, () => false, IntPtr.Zero);

            var imageByteArray = new byte[0];

            using (MemoryStream mStream = new MemoryStream())
            {
                thumbnail.Save(mStream, ImageFormat.Png);
                imageByteArray = mStream.ToArray();
            }
            imgFromStream.Dispose();
            thumbnail.Dispose();
            return imageByteArray;
        }

    }

The issue is that only on Linux machine, the tests are failing from the line with (---->>>). I've tried with ImageConverter, linux has a bad opinion for that too and it is still not working. I'm out of ideas.

StackTrace :   at System.Drawing.Image.InitializeFromStream(Stream stream)
at System.Drawing.Image.LoadFromStream(Stream stream, Boolean keepAlive)
at System.Drawing.Image.FromStream(Stream stream, Boolean useEmbeddedColorManagement, Boolean validateImageData)

The method that creates the Image for tests :

 public Image ByteArrayToImage(byte[] byteArrayIn)
    {
        int size = (int)Math.Sqrt(byteArrayIn.Length);

        Bitmap bitmap = new Bitmap(size, size, PixelFormat.Format32bppArgb);
        BitmapData bitmapData = bitmap.LockBits(new Rectangle(0, 0, bitmap.Width, bitmap.Height), ImageLockMode.ReadWrite, bitmap.PixelFormat);

        try
        {
            for (int rowIndex = 0; rowIndex < bitmapData.Height; ++rowIndex)
                Marshal.Copy(byteArrayIn, rowIndex * bitmap.Width, bitmapData.Scan0 + rowIndex * bitmapData.Stride, bitmap.Width);
        }
        finally
        {
            bitmap.UnlockBits(bitmapData);
        }

        return bitmap;
    }

And the byteArrayIn parameter is generated :

     private byte[] GenerateImageByteArray(int sizeInMb)
    {
        Random rnd = new Random();


        Byte[] b = new Byte[sizeInMb * 1024 * 1024]; // convert mb to byte
        rnd.NextBytes(b);

        //This conversion is needed because the GetThumbnail method from the Service will throw an error
        //A random generated byte array can not be converted into a thumbnail
        //Only if it's from an image
        var image = ByteArrayToImage(b);
        var imageByteArray = new byte[0];
        using (MemoryStream mStream = new MemoryStream())
        {
            image.Save(mStream, ImageFormat.Png);
            imageByteArray=mStream.ToArray();
        }

        return imageByteArray;
    }
c++sharplinuximageasp.net-corefile-upload


Solution 1:[1]

If you want to use System.Drawing.Common on linux you need to install GDI+ support libraries:

sudo apt install libc6-dev 
sudo apt install libgdiplus

Solution 2:[2]

While not specified by the OP, if you are using .NET 6, System.Drawing.Common is only supported on Linux via a backwards compatibility runtime config setting. It is completely deprecated in .NET 7.

From MSDN:

To use these APIs for cross-platform apps, migrate to one of the following libraries:

Alternatively, you can enable support for non-Windows platforms in .NET 6 by setting the System.Drawing.EnableUnixSupport runtime configuration switch to true in the runtimeconfig.json (runtimeconfig.template.json) file:

{
   "configProperties": {
      "System.Drawing.EnableUnixSupport": true
   }
}

This configuration switch was added to give cross-platform apps that depend heavily on this package time to migrate to more modern libraries. However, non-Windows bugs will not be fixed. In addition, this switch has been removed in .NET 7.

See here for more info - System.Drawing.Common only supported on Windows

Sources

This article follows the attribution requirements of Stack Overflow and is licensed under CC BY-SA 3.0.

Source: Stack Overflow

Solution Source
Solution 1 LazZiya
Solution 2 Dave Black

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