gdk_draw_image with alpha compositing on X?

["Matthew Allen" <list sydneyband com au>]

Hi,

I'm calling gdk_draw_image with a 32-bit per pixel image with some pixels having alpha=0 and some with 
alpha=255, and the transparent pixels come through as black (not surprisingly). What is the correct was to 
get that on to the screen? (for Win32 and X)

Regards
--
Matthew Allen