X API function to get the pixel content in a given range of the root window

Hi,

I'm developing a dekstop recorder app. I know about the XDamage
extension but I wouldn't use it because on 3d desktop the "damage" is
not detected.
I was thinking to use memcmp() to detect pixel changes. Which X API
function shall I use if I want to get the pixel content in a given
range of the root window?

Thanks,
Giuseppe

>On Nov 30, 11:20 am, "colossus" <colossu...@gmail.com> wrote:[color=blue]
> Which X API function shall I use if I want to get the pixel content in a given
> range of the root window?[/color]

Ok XGetImage() is what I need.
--
Colossus