JPEG encoder unavailable for GDI+ on mono (CentOS)

Question

I have installed mono 3.2.6 on CentOS 6.4. I need to create JPEG bitmap, but the following method does not return proper mime type:

ImageCodecInfo jpegImageCodecInfo = ImageCodecInfo.GetImageEncoders().FirstOrDefault(x => x.MimeType.Equals("image/jpeg"));

ImageCodecInfo.GetImageEncoders() returns only image/bmp and image/png. I already have installed libjpeg-turbo and libjpeg-turbo-devel with libjpeg-turbo-static, but with no effect. What could be the reason?

Answer 1

Ok, finally we managed to solve the problem.

Problem was that libgdiplus could not find the proper version of libjpeg.so. The newest version of libjpeg.so provided with libjpeg-turbo was 62 while the required version is 90. Finally we used the newest version of libjpeg available at http://www.ijg.org/.

If you encounter similar problem you should first install proper (>=90) version of libjpeg.so then copy it to /usr/lib64/ and then recompile libgdiplus. That should fix it.