3b70b66fa9
When accumulating damage in the repaint loop, the opaque region of surfaces in other planes is added to the overall opaque region. This causes surface->clip to contain the areas obscured by surfaces in other planes. Change it to contain only the opaque region of surfaces in the primary plane This fixes a bug where moving a window that was just moved from the primary plane to another would leave artifacts on the screen. The problem was that the damage generated by weston_surface_move_to_plane() would be clipped on weston_surface_redraw(), leaving the contets below it unchanged. Moving the overlaid surface would no longer generate damage on the primary plane, so the contents would remain unchanged (i.e. wrong) indefinitely.
Weston Weston is the reference implementation of a Wayland compositor, and a useful compositor in its own right. Weston has various backends that lets it run on Linux kernel modesetting and evdev input as well as under X11. Weston ships with a few example clients, from simple clients that demonstrate certain aspects of the protocol to more complete clients and a simplistic toolkit. There is also a quite capable terminal emulator (weston-terminal) and an toy/example desktop shell. Finally, weston also provides integration with the Xorg server and can pull X clients into the Wayland desktop and act as a X window manager. Refer to http://wayland.freedesktop.org/building.html for buiding weston and its dependencies.