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Prefix is mostly an independent system from the host. Therefore it is possible to get full CJK features within Prefix despite of the host.

In this guide, a solution of app-emacs/scim-bridge-el in app-editors/emacs running on x11-wm/xpra is given.

The remote X server

x11-wm/xpra is the "screen for X", it allows you to run X programs, usually on a remote host and direct their display to your local machine.

In most of the cases, Prefix does not have access to the real input/output devices such as the keyboard and display on the host. It is preferrable to only use dummy drivers.

FILE ${EPREFIX}/etc/portage/make.conf

Install xpra,

root #emerge --ask x11-wm/xpra

Next, install standard X and CJK fonts:

root #emerge --ask media-fonts/font-misc-misc media-fonts/efont-unicode media-fonts/wqy-bitmapfont media-fonts/font-adobe-75dpi media-fonts/font-adobe-100dpi
The fonts listed here are only a suggestion. Feel free to compile your own list.

Setup fonts for Xpra

Tell Xpra to use Xorg instead of Xvfb.

FILE ${EPREFIX}/etc/xpra/xpra.conf
xvfb=Xorg -dpi 96 -noreset -nolisten tcp +extension GLX +extension RANDR +extension RENDER -logfile ${HOME}/.xpra/Xorg.${DISPLAY}.log -config /home/benda/gnto/etc/xpra/xorg.conf
Replace /home/benda/gnto with your own EPREFIX value.

The location of the fonts needs to be told to the Xorg of Xpra. Fonts from the host can be used, too.

FILE ${EPREFIX}/etc/xpra/xorg.conf
Section "Files"
  FontPath "/home/benda/gnto/usr/share/fonts/wqy-bitmapfont"
  FontPath "catalogue:/etc/X11/fontpath.d"

The wqy-bitmapfont line are quite straight forward, while the second line is special to a RHEL-like host.

Start Xpra

Start Xpra and verify the fonts are installed:

user $xpra start :10
user $export DISPLAY=:10
user $xlsfonts | grep '9x15\|wenquanyi'
-wenquanyi-wenquanyi bitmap song-medium-r-normal--13-130-75-75-p-80-iso10646-1
-wenquanyi-wenquanyi bitmap song-medium-r-normal--15-150-75-75-p-80-iso10646-1
-wenquanyi-wenquanyi bitmap song-medium-r-normal--16-160-75-75-p-80-iso10646-1

Consult the xpra homepage for its basic usage.

Emacs and SCIM

app-emacs/scim-bridge-el will pull in app-editor/emacs and app-i18n/scim.

root #emerge --ask app-emacs/scim-bridge-el

Follow the tips in the Emacs wiki to have your scim-bridge-el setup in Emacs.