How to cleanup wl_surface contents - previous display on screen ?

[bhushanjcool]

Hi,

I am working on sample application based on opengl and wayland.

When I exit the application, I am destroying buffer and surfaces and other resources still the contents of the buffer are not getting cleaned up. I see the previous drawings are still on the screen.

I used this as an attempt:
wl_surface::attach(0, 0, 0);
wl_surface::commit();

Still its not working.
Please give some hints.

Thanks,
Bhushan.

[daniels]

committing a NULL buffer to a surface will remove the surface from the screen. if you are using weston and desktop-shell, the background will be displayed instead of the buffer contents. but if there's no background surface, the old contents will remain.