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Xephyr

Langue: en

Version: xorg-server 1.9.0 (fedora - 01/12/10)

Section: 1 (Commandes utilisateur)

NAME

Xephyr - X server outputting to a window on a pre-existing X display

SYNOPSIS

Xephyr [:display] [option ...]

DESCRIPTION

Xephyr is a kdrive server that outputs to a window on a pre-existing "host" X display. Think Xnest but with support for modern extensions like composite, damage and randr.

Unlike Xnest which is an X proxy, i.e. limited to the capabilities of the host X server, Xephyr is a real X server which uses the host X server window as "framebuffer" via fast SHM XImages.

It also has support for "visually" debugging what the server is painting.

OPTIONS

-screen widthxheight
sets the screen size.
-parent id
uses exiting window id . If a -screen argument follows a -parent argument, this screen is embedded into the given window.
-host-cursor
set 'cursor acceleration': The host's cursor is reused. This is only really there to aid debugging by avoiding server paints for the cursor. Performance improvement is negligible.

SIGNALS

Send a SIGUSR1 to the server (e.g. pkill -USR1 Xephyr) to toggle the debugging mode. In this mode red rectangles are painted to screen areas getting painted before painting the actual content. The delay between this can be altered by setting a XEPHYR_PAUSE env var to a value in micro seconds.

CAVEATS

*
Rotated displays are currently updated via full blits. This is slower than a normal orientated display. Debug mode will therefore not be of much use rotated.
*
The '-host-cursor' cursor is static in its appearance.
*
The build gets a warning about 'nanosleep'. I think the various '-D' build flags are causing this. I haven't figured as yet how to work round it. It doesn't appear to break anything however.
*
Keyboard handling is basic but works.
Mouse button 5 probably won't work.

SEE ALSO

X(7), Xserver(1)

AUTHOR

Matthew Allum <mallum@o-hand.com> 2004
Ni Argo ? Ta morue marin
N'a bel liard. Rage t'écaille
Si sel lia cet égard raille
Banni rameur.. ô mât ô grain !

Cri à mat matelot amer :
"Case lien ultime ta bile
Ce célibat émit l'une île
Sacre ma tôle tam-tam air"

Cet artimon amirauté
Mal né - oh ! ce drakkar de l'âme
Mâle drakkar d'écho en lame
Tua, rima, n'omit raté

Pelé dur ce rameur calé
Dénia simoun et sirène
Je ne ris ténu ô misaine !
De la crue Mare Crudele

Plage. Le bac n'a l'abyssal
Ému ce lac rebat sa brume
Le mur basta ! berça l'écume
Las.. s'y balança bel égal

-- Rapilly, Robert