如何将我的应用程序的桌面图标设置为Linux: KDE, Gnome等等?

I have a cross platform program that runs on Windows, Linux and Macintosh. My windows version has an Icon but I don't know how to make have one for my Linux build. Is there a standard format for KDE, Gnome etc. or will I have to do something special for each one?I have a cross platform program that runs on Wi