ImageCodecInfo.GetImageEncoders() throws fatal exception in 9.0.0 package.

[bitbound]

.NET version

9.0

Did it work in .NET Framework?

Yes

Did it work in any of the earlier releases of .NET Core or .NET 5+?

Yes. It worked in 8.0.x.

Issue description

ImageCodecInfo.GetImageEncoders() throws a fatal exception in the 9.0.0 version of System.Drawing.Common.

Steps to reproduce

Exception in 9.0

Working in 8.0

[JeremyKuhne]

@bitbound you can work around this by getting one of the Brushes or Pens, etc.

Validation that GDI+ is initialized slipped through in this use case. Need to check other places PInvokes come from the Core assembly.

Will fix and put up for servicing.

[bitbound]

@JeremyKuhne Thanks for the reply. I'm not sure what you mean about Brushes/Pens, though. I'm not seeing how I'd get an ImageCodecInfo out of one of them. Nevermind. I understand what you mean now about the initialization.

If it helps, here's my use case. This is in a desktop console app (Windows only). Is there another way to adjust encoding quality that'd work around this issue? Or would you recommend migrating to SkiaSharp?

  private readonly ImageCodecInfo _jpegEncoder = ImageCodecInfo
    .GetImageEncoders()
    .First(x => x.FormatID == ImageFormat.Jpeg.Guid);

  public byte[] EncodeJpeg(Bitmap bitmap, int quality)
  {
    using var ms = new MemoryStream();
    using var encoderParams = new EncoderParameters(1);
    encoderParams.Param[0] = new EncoderParameter(Encoder.Quality, quality);
    bitmap.Save(ms, _jpegEncoder, encoderParams);
    return ms.GetBuffer();
  }

[JeremyKuhne]

@bitbound presumably you're ok.

Since I wasn't super clear here, you can just access a static resource to work around this until we get a servicing fix. So _ = Pens.Black; or something like that before calling the affected methods. There is one other path I missed, but that is less likely to be hit (getting the halftone palette).

[JeremyKuhne]

Need to service .NET 9.

[JeremyKuhne]

Actually, the only method I missed in .NET 9 was GetImageEncoders.