Pekka Paalanen
0de22a38e6
Add the missing feedback flags to the Presentation extension protocol specification. These flags are slightly different from the previous RFCv3.1 definition: http://lists.freedesktop.org/archives/wayland-devel/2014-March/013598.html Now, all compositors are safe to use 0 as the flags if they don't bother setting them properly. 0 is the "worst case" with the least guarantees. The meaning of ZERO_COPY is not exactly the opposite of the old COPY flag. ZERO_COPY is more strict, but applies only to that one surface. Therefore it can be used to verify a zero-copy video playback pipeline, also to a hardware overlay. There is no longer a flag to clearly indicate if the final presentation was done by a copy or a page flip. ZERO_COPY forbids the copy, but VSYNC alone does allow copy in case it cannot tear. It is possible to have first a compositing pass, and then another copy into the frontbuffer, and still set VSYNC if it cannot tear. Usually "cannot tear" is too hard to guarantee with a copy, so it often implies a page flip. Signed-off-by: Pekka Paalanen <pekka.paalanen@collabora.co.uk> Reviewed-by: Mario Kleiner <mario.kleiner.de@gmail.com> Tested-by: Mario Kleiner <mario.kleiner.de@gmail.com>
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 building weston and its dependencies. The test suite can be invoked via `make check`; see http://wayland.freedesktop.org/testing.html for additional details.