show image of current buffer in frame buffer (/dev/fbX)

Hello,

Is it possible to display in some way the current content of frame buffer ?
I have some issue that on rendering to /dev/fb2 with one application
(psplash), it goes to the correct output, but using another
application (qt) it always goes to /dev/fb2 (even if I static link
/dev/fb0 to /dev/fb2).
I thought that if I can display the content of frame buffer, it will
help me understand what's going wrong.

Regards,
Ran