Convert WMF to JPG

Question

Is there anyone that can point me in the right direction?
I want to be able to convert some wmf-files to jpg using .net (C# or VB - doesn't matter).

Where should I start?

Answer 1

The .NET Framework supports a number of image formats including WMF which means its simply a matter of loading the image and then resaving it ala:

         using System.Drawing;
         using System.Drawing.Imaging;

         ...

         Image i = Image.FromFile("InputFile.wmf");
         i.Save("DestinationFile.jpg", ImageFormat.Jpeg);

Answer 2

Wow - that's pretty easy!

Unfortunately, if the wmf-file has a white surrounding area, it becomes black after the convertion to jpg?
Any suggestions?

Answer 3

If I recall correctly, WMF files do not store a background color which causes them to be transparent and when you convert it as we did previously, the color ends up being no color at all (ie black).

In order to fix that we need to do a little more, namely create a new image, set it's background color and then paint the WMF file on top of it.

            Image i = Image.FromFile("SomeFile.wmf", true);

           

            Bitmap b = new Bitmap(i);

           

            Graphics g = Graphics.FromImage(b);

           

            g.Clear(Color.White);

           

            g.DrawImage(i, 0, 0, i.Width, i.Height);

           

            b.Save("C:\OutputFile.jpg", ImageFormat.Jpeg);

Answer 4

Perfect!

Thank you very much for your help!