blur the backbuffer

anyone got a routine that can do an all over blur to the GL backbuffers ? would be most cool if anyone had one.


Gaussian blur hack:

read the back buffer (to texture/bitmap/wjatever) and redraw it with different offsets located within a circle. If you draw n images then change the colour scale to 1/n


do you know anywhere where i can find ‘Gaussian blur’ code ? sounds just like what i need to do.