1. Introduction
2. Building
2.1 Building from source on fedora
2.2 Building from source with your own Xserver
3. Running

= 1. Introduction =
Xspice is an X server and Spice server in one. It consists of a wrapper script
for executing Xorg with the right parameters and environment variables, a
module names spiceqxl_drv.so implementing three drivers: a video mostly
code identical to the guest qxl X driver, and keyboard and mouse reading from
the spice inputs channel.

Xspice allows regular X connections, while a spice client provides the keyboard
and mouse and video output.

Spice client disconnections don't impact X client connections.

Xserver's select loop is reused to service spice client sockets
and the qxl driver is reused together with some of the qemu qxl device code

The following changes have been done to the qxl driver.
 * it creates only one memslot, covering the whole of memory (much like
  spice does in simple display mode, i.e. vga, and the tester does)
 * it invokes the whole of the qxl device from qemu, patching in both
  directions.
  * io becomes a function call instead of iob
  * irq becomes a function call instead of setting a flag
  * it runs spice server directly
   * it is linked with spice-server.

The protocol is unchanged.

= 2. Building =
== 2.1 Building from source on fedora ==

The changes for ubuntu/debian should be minimal:
 * location of drivers for Xorg (just where you put any qxl_drv.so etc.)
 * location of Xorg config files

In fedora they are: (note the lib64 - replace with lib if running on 32 bit
fedora)

DRV_DIR=/usr/lib64/xorg/modules/drivers
XORG_CONF_DIR=/etc/X11

git clone git://anongit.freedesktop.org/xorg/driver/xf86-video-qxl
sudo yum install spice-server-devel spice-protocol

cd xspice
autoreconf -i && ./configure --enable-xspice && make
sudo cp src/.libs/spiceqxl_drv.so $DRV_DIR
sudo cp spiceqxl.xorg $XORG_CONF_DIR

Note: spiceqxl.org is copied to $XORG_CONF_DIR because Xorg only looks in a
very particular config file path, and "." is not there (nor are absolute file
names allowed unless Xorg is run as root).

== 2.2 Building from source with your own Xserver ==

Building the whole xserver is lengthier but can be done without
any root permissions.

This assumes you already have spice-protocol and spice-server
installed into $TEST prefix below.

TEST=/store/test
grab xserver, xspice, xextproto and xkbcomp

for src in git://anongit.freedesktop.org/xorg/proto/xextproto \
git://anongit.freedesktop.org/xorg/app/xkbcomp \
git://anongit.freedesktop.org/xorg/xserver \
git://anongit.freedesktop.org/xorg/lib/libxkbfile \
git://git.freedesktop.org/git/spice/spice-protocol
git://anongit.freedesktop.org/xorg/driver/xf86-video-qxl; do git clone $src; done

build and install into some non common prefix (not to overwrite
your existing server) - note that this is just for testing. This
should all work with the default server as well, but that server
requires root generally and this is undesireable for testing (and
running actually).

export PKG_CONFIG_PATH=${TEST}/lib/pkgconfig
(cd xextproto; ./autogen.sh --prefix=$TEST --without-xmlto && make install)
(cd xserver; ./autogen.sh --prefix=$TEST && make install)
(cd xkbcomp; ./autogen.sh --prefix=$TEST && make install)
(cd libxkbfile; ./autogen.sh --prefix=$TEST && make install)
(cd spice-protocol; ./autogen.sh --prefix=$TEST  --datadir=$TEST/lib && make install)
(cd xspice; ./autogen.sh --prefix=$TEST && make install)

mkdir -p $TEST/etc/X11

place the tested config below in $TEST/etc/X11/spiceqxl.xorg.conf.

last bit is a little ugly (FIXME), copy over the xkb bits from the existing X11
installation:
mkdir -p $TEST/share/X11
cp -R /usr/share/X11/xkb $TEST/share/X11

= 3. Running =
$XORG is either your own built $TEST/bin/Xorg or just the default Xorg

Run server with:
export XSPICE_PORT=5900
$XORG -noreset -config spiceqxl.xorg.conf :3.0

Or equivalently:
./xspice --port 5900 :3.0

Run X clients as usual by setting DISPLAY=:3.0

Run a spice client:
spicec -h localhost -p 5900