Saving a buffer as jpeg

I know I've seen a library somewhere in the past that could do this, but all of my searching is finding nothing now. Does anyone know how I can save image buffers as jpeg instead of bmp?

Is that FreeImage?

I guess FreeImage can do so, since JPG is no longer a licensed patent, AFAIK. It was wrapped for blitz, se eg. here:
http://www.blitzbasic.com/Community/posts.php?topic=57729#642113

Awesome, I'll give it a shot. Thanks!