Initial revision

21 files changed, 1438 insertions, 0 deletions

diff --git a/AUTHORS b/AUTHORS
new file mode 100644
index 0000000..e69de29
--- /dev/null
+++ b/AUTHORS
diff --git a/COPYING b/COPYING
new file mode 100644
index 0000000..a671455
--- /dev/null
+++ b/COPYING
@@ -0,0 +1,19 @@
+$Id$
+
+Permission to use, copy, modify, distribute, and sell this software and its
+documentation for any purpose is hereby granted without fee, provided that
+the above copyright notice appear in all copies and that both that
+copyright notice and this permission notice appear in supporting
+documentation, and that the name of the authors not be used in
+advertising or publicity pertaining to distribution of the software without
+specific, written prior permission.  The authors make no
+representations about the suitability of this software for any purpose.  It
+is provided "as is" without express or implied warranty.
+
+THE AUTHORS DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE,
+INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO
+EVENT SHALL THE AUTHORS BE LIABLE FOR ANY SPECIAL, INDIRECT OR
+CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE,
+DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER
+TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
+PERFORMANCE OF THIS SOFTWARE.
diff --git a/ChangeLog b/ChangeLog
new file mode 100644
index 0000000..e69de29
--- /dev/null
+++ b/ChangeLog
diff --git a/INSTALL b/INSTALL
new file mode 100644
index 0000000..54caf7c
--- /dev/null
+++ b/INSTALL
@@ -0,0 +1,229 @@
+Copyright (C) 1994, 1995, 1996, 1999, 2000, 2001, 2002 Free Software
+Foundation, Inc.
+
+   This file is free documentation; the Free Software Foundation gives
+unlimited permission to copy, distribute and modify it.
+
+Basic Installation
+==================
+
+   These are generic installation instructions.
+
+   The `configure' shell script attempts to guess correct values for
+various system-dependent variables used during compilation.  It uses
+those values to create a `Makefile' in each directory of the package.
+It may also create one or more `.h' files containing system-dependent
+definitions.  Finally, it creates a shell script `config.status' that
+you can run in the future to recreate the current configuration, and a
+file `config.log' containing compiler output (useful mainly for
+debugging `configure').
+
+   It can also use an optional file (typically called `config.cache'
+and enabled with `--cache-file=config.cache' or simply `-C') that saves
+the results of its tests to speed up reconfiguring.  (Caching is
+disabled by default to prevent problems with accidental use of stale
+cache files.)
+
+   If you need to do unusual things to compile the package, please try
+to figure out how `configure' could check whether to do them, and mail
+diffs or instructions to the address given in the `README' so they can
+be considered for the next release.  If you are using the cache, and at
+some point `config.cache' contains results you don't want to keep, you
+may remove or edit it.
+
+   The file `configure.ac' (or `configure.in') is used to create
+`configure' by a program called `autoconf'.  You only need
+`configure.ac' if you want to change it or regenerate `configure' using
+a newer version of `autoconf'.
+
+The simplest way to compile this package is:
+
+  1. `cd' to the directory containing the package's source code and type
+     `./configure' to configure the package for your system.  If you're
+     using `csh' on an old version of System V, you might need to type
+     `sh ./configure' instead to prevent `csh' from trying to execute
+     `configure' itself.
+
+     Running `configure' takes awhile.  While running, it prints some
+     messages telling which features it is checking for.
+
+  2. Type `make' to compile the package.
+
+  3. Optionally, type `make check' to run any self-tests that come with
+     the package.
+
+  4. Type `make install' to install the programs and any data files and
+     documentation.
+
+  5. You can remove the program binaries and object files from the
+     source code directory by typing `make clean'.  To also remove the
+     files that `configure' created (so you can compile the package for
+     a different kind of computer), type `make distclean'.  There is
+     also a `make maintainer-clean' target, but that is intended mainly
+     for the package's developers.  If you use it, you may have to get
+     all sorts of other programs in order to regenerate files that came
+     with the distribution.
+
+Compilers and Options
+=====================
+
+   Some systems require unusual options for compilation or linking that
+the `configure' script does not know about.  Run `./configure --help'
+for details on some of the pertinent environment variables.
+
+   You can give `configure' initial values for configuration parameters
+by setting variables in the command line or in the environment.  Here
+is an example:
+
+     ./configure CC=c89 CFLAGS=-O2 LIBS=-lposix
+
+   *Note Defining Variables::, for more details.
+
+Compiling For Multiple Architectures
+====================================
+
+   You can compile the package for more than one kind of computer at the
+same time, by placing the object files for each architecture in their
+own directory.  To do this, you must use a version of `make' that
+supports the `VPATH' variable, such as GNU `make'.  `cd' to the
+directory where you want the object files and executables to go and run
+the `configure' script.  `configure' automatically checks for the
+source code in the directory that `configure' is in and in `..'.
+
+   If you have to use a `make' that does not support the `VPATH'
+variable, you have to compile the package for one architecture at a
+time in the source code directory.  After you have installed the
+package for one architecture, use `make distclean' before reconfiguring
+for another architecture.
+
+Installation Names
+==================
+
+   By default, `make install' will install the package's files in
+`/usr/local/bin', `/usr/local/man', etc.  You can specify an
+installation prefix other than `/usr/local' by giving `configure' the
+option `--prefix=PATH'.
+
+   You can specify separate installation prefixes for
+architecture-specific files and architecture-independent files.  If you
+give `configure' the option `--exec-prefix=PATH', the package will use
+PATH as the prefix for installing programs and libraries.
+Documentation and other data files will still use the regular prefix.
+
+   In addition, if you use an unusual directory layout you can give
+options like `--bindir=PATH' to specify different values for particular
+kinds of files.  Run `configure --help' for a list of the directories
+you can set and what kinds of files go in them.
+
+   If the package supports it, you can cause programs to be installed
+with an extra prefix or suffix on their names by giving `configure' the
+option `--program-prefix=PREFIX' or `--program-suffix=SUFFIX'.
+
+Optional Features
+=================
+
+   Some packages pay attention to `--enable-FEATURE' options to
+`configure', where FEATURE indicates an optional part of the package.
+They may also pay attention to `--with-PACKAGE' options, where PACKAGE
+is something like `gnu-as' or `x' (for the X Window System).  The
+`README' should mention any `--enable-' and `--with-' options that the
+package recognizes.
+
+   For packages that use the X Window System, `configure' can usually
+find the X include and library files automatically, but if it doesn't,
+you can use the `configure' options `--x-includes=DIR' and
+`--x-libraries=DIR' to specify their locations.
+
+Specifying the System Type
+==========================
+
+   There may be some features `configure' cannot figure out
+automatically, but needs to determine by the type of machine the package
+will run on.  Usually, assuming the package is built to be run on the
+_same_ architectures, `configure' can figure that out, but if it prints
+a message saying it cannot guess the machine type, give it the
+`--build=TYPE' option.  TYPE can either be a short name for the system
+type, such as `sun4', or a canonical name which has the form:
+
+     CPU-COMPANY-SYSTEM
+
+where SYSTEM can have one of these forms:
+
+     OS KERNEL-OS
+
+   See the file `config.sub' for the possible values of each field.  If
+`config.sub' isn't included in this package, then this package doesn't
+need to know the machine type.
+
+   If you are _building_ compiler tools for cross-compiling, you should
+use the `--target=TYPE' option to select the type of system they will
+produce code for.
+
+   If you want to _use_ a cross compiler, that generates code for a
+platform different from the build platform, you should specify the
+"host" platform (i.e., that on which the generated programs will
+eventually be run) with `--host=TYPE'.
+
+Sharing Defaults
+================
+
+   If you want to set default values for `configure' scripts to share,
+you can create a site shell script called `config.site' that gives
+default values for variables like `CC', `cache_file', and `prefix'.
+`configure' looks for `PREFIX/share/config.site' if it exists, then
+`PREFIX/etc/config.site' if it exists.  Or, you can set the
+`CONFIG_SITE' environment variable to the location of the site script.
+A warning: not all `configure' scripts look for a site script.
+
+Defining Variables
+==================
+
+   Variables not defined in a site shell script can be set in the
+environment passed to `configure'.  However, some packages may run
+configure again during the build, and the customized values of these
+variables may be lost.  In order to avoid this problem, you should set
+them in the `configure' command line, using `VAR=value'.  For example:
+
+     ./configure CC=/usr/local2/bin/gcc
+
+will cause the specified gcc to be used as the C compiler (unless it is
+overridden in the site shell script).
+
+`configure' Invocation
+======================
+
+   `configure' recognizes the following options to control how it
+operates.
+
+`--help'
+`-h'
+     Print a summary of the options to `configure', and exit.
+
+`--version'
+`-V'
+     Print the version of Autoconf used to generate the `configure'
+     script, and exit.
+
+`--cache-file=FILE'
+     Enable the cache: use and save the results of the tests in FILE,
+     traditionally `config.cache'.  FILE defaults to `/dev/null' to
+     disable caching.
+
+`--config-cache'
+`-C'
+     Alias for `--cache-file=config.cache'.
+
+`--quiet'
+`--silent'
+`-q'
+     Do not print messages saying which checks are being made.  To
+     suppress all normal output, redirect it to `/dev/null' (any error
+     messages will still be shown).
+
+`--srcdir=DIR'
+     Look for the package's source code in directory DIR.  Usually
+     `configure' can determine that directory automatically.
+
+`configure' also accepts some other, not widely useful, options.  Run
+`configure --help' for more details.
+
diff --git a/Makefile.am b/Makefile.am
new file mode 100644
index 0000000..8b34de1
--- /dev/null
+++ b/Makefile.am
@@ -0,0 +1,57 @@
+# 
+#  $Id$
+# 
+#  Copyright © 2004 @AUTHORS@
+# 
+#  Permission to use, copy, modify, distribute, and sell this software and its
+#  documentation for any purpose is hereby granted without fee, provided that
+#  the above copyright notice appear in all copies and that both that
+#  copyright notice and this permission notice appear in supporting
+#  documentation, and that the name of the authors not be used in
+#  advertising or publicity pertaining to distribution of the software without
+#  specific, written prior permission.  The authors make no
+#  representations about the suitability of this software for any purpose.  It
+#  is provided "as is" without express or implied warranty.
+# 
+#  THE AUTHORS DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE,
+#  INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO
+#  EVENT SHALL THE AUTHORS BE LIABLE FOR ANY SPECIAL, INDIRECT OR
+#  CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE,
+#  DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER
+#  TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
+#  PERFORMANCE OF THIS SOFTWARE.
+#
+
+PROGRAM=lightpipe
+
+man_MANS=lightpipe.1
+
+LOCAL_DOCS=$(man_MANS)
+
+AM_CFLAGS = $(LIGHTPIPE_CFLAGS)	$(WARN_CFLAGS)
+
+bin_PROGRAMS = lightpipe
+
+lib_LTLIBRARIES = liblightpipe.la
+
+liblightpipe_la_SOURCES = \
+	lpapi.c \
+	lpdamage.c \
+	lpdisplay.c \
+	lpevent.c \
+	lpimage.c \
+	lpinit.c \
+	lpint.h \
+	lptable.c
+
+liblightpipeincludedir = $(includedir)/X11/extensions
+liblightpipeinclude_HEADERS = lightpipe.h
+
+pkgconfigdir = $(libdir)/pkgconfig
+pkgconfig_DATA = lightpipe.pc
+
+EXTRA_DIST=$(LOCAL_DOCS) lightpipe.pc.in autogen.sh
+
+lightpipe_SOURCES = lightpipe.c
+
+lightpipe_LDADD = $(LIGHTPIPE_LIBS) liblightpipe.la
diff --git a/NEWS b/NEWS
new file mode 100644
index 0000000..e69de29
--- /dev/null
+++ b/NEWS
diff --git a/README b/README
new file mode 100644
index 0000000..e69de29
--- /dev/null
+++ b/README
diff --git a/autogen.sh b/autogen.sh
new file mode 100755
index 0000000..b1376df
--- /dev/null
+++ b/autogen.sh
@@ -0,0 +1,3 @@
+#! /bin/sh
+autoreconf -v --install || exit 1
+./configure --enable-maintainer-mode "$@"
diff --git a/configure.ac b/configure.ac
new file mode 100644
index 0000000..97f8d9c
--- /dev/null
+++ b/configure.ac
@@ -0,0 +1,51 @@
+dnl
+dnl $Id$
+dnl
+dnl Copyright © 2004 Keith Packard
+dnl
+dnl Permission to use, copy, modify, distribute, and sell this software and its
+dnl documentation for any purpose is hereby granted without fee, provided that
+dnl the above copyright notice appear in all copies and that both that
+dnl copyright notice and this permission notice appear in supporting
+dnl documentation, and that the name of the authors not be used in
+dnl advertising or publicity pertaining to distribution of the software without
+dnl specific, written prior permission.  The authors make no
+dnl representations about the suitability of this software for any purpose.  It
+dnl is provided "as is" without express or implied warranty.
+dnl
+dnl THE AUTHORS DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE,
+dnl INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO
+dnl EVENT SHALL THE AUTHORS BE LIABLE FOR ANY SPECIAL, INDIRECT OR
+dnl CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE,
+dnl DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER
+dnl TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
+dnl PERFORMANCE OF THIS SOFTWARE.
+dnl
+
+AC_PREREQ(2.57)
+AC_INIT([lightpipe],0.0.0,[keithp@freedesktop.org],lightpipe)
+AC_CONFIG_SRCDIR([Makefile.am])
+AM_INIT_AUTOMAKE([dist-bzip2])
+AM_MAINTAINER_MODE
+AM_CONFIG_HEADER(config.h)
+
+AC_PROG_CC
+AC_PROG_INSTALL
+AC_PROG_LN_S
+AC_LIBTOOL_WIN32_DLL
+AM_PROG_LIBTOOL
+AC_PROG_MAKE_SET
+
+PKG_CHECK_MODULES(LIGHTPIPE, xdamage xcomposite xext x11)
+
+WARN_CFLAGS=""
+
+if test "x$GCC" = "xyes"; then
+	WARN_CFLAGS="-Wall -Wpointer-arith -Wstrict-prototypes \
+	-Wmissing-prototypes -Wmissing-declarations \
+	-Wnested-externs -fno-strict-aliasing"
+fi
+AC_SUBST(WARN_CFLAGS)
+
+AC_OUTPUT([Makefile
+	   lightpipe.pc])
diff --git a/lightpipe.1 b/lightpipe.1
new file mode 100644
index 0000000..5649cc6
--- /dev/null
+++ b/lightpipe.1
@@ -0,0 +1,34 @@
+.\"
+.\" Copyright 2001 Keith Packard, member of The XFree86 Project, Inc..\"
+.\" Permission to use, copy, modify, distribute, and sell this software and its
+.\" documentation for any purpose is hereby granted without fee, provided that
+.\" the above copyright notice appear in all copies and that both that
+.\" copyright notice and this permission notice appear in supporting
+.\" documentation, and that the name of Keith Packard not be used in
+.\" advertising or publicity pertaining to distribution of the software without
+.\" specific, written prior permission.  Keith Packard makes no
+.\" representations about the suitability of this software for any purpose.  It
+.\" is provided "as is" without express or implied warranty.
+.\"
+.\" KEITH PACKARD DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE,
+.\" INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO
+.\" EVENT SHALL KEITH PACKARD BE LIABLE FOR ANY SPECIAL, INDIRECT OR
+.\" CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE,
+.\" DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER
+.\" TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
+.\" PERFORMANCE OF THIS SOFTWARE.
+.\"
+.\"
+.\" $XFree86: xc/programs/xrandr/xrandr.man,v 1.6 2003/06/12 14:12:39 eich Exp $
+.\"
+.TH LIGHTPIPE 1 "Version 1.0" "X.Org"
+.SH NAME
+lightpipe \- pump X windows from one display to another
+.SH SYNOPSIS
+.B "lightpipe"
+.SH DESCRIPTION
+.SH "SEE ALSO"
+Xdamage(3)
+.SH AUTHORS
+Keith Packard,
+Cambridge Research Laboratory, HP Labs, HP.
diff --git a/lightpipe.c b/lightpipe.c
new file mode 100644
index 0000000..1c6deae
--- /dev/null
+++ b/lightpipe.c
@@ -0,0 +1,113 @@
+/*
+ * $Id$
+ *
+ * Copyright © 2004 Keith Packard
+ *
+ * Permission to use, copy, modify, distribute, and sell this software and its
+ * documentation for any purpose is hereby granted without fee, provided that
+ * the above copyright notice appear in all copies and that both that
+ * copyright notice and this permission notice appear in supporting
+ * documentation, and that the name of Keith Packard not be used in
+ * advertising or publicity pertaining to distribution of the software without
+ * specific, written prior permission.  Keith Packard makes no
+ * representations about the suitability of this software for any purpose.  It
+ * is provided "as is" without express or implied warranty.
+ *
+ * KEITH PACKARD DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE,
+ * INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO
+ * EVENT SHALL KEITH PACKARD BE LIABLE FOR ANY SPECIAL, INDIRECT OR
+ * CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE,
+ * DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER
+ * TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
+ * PERFORMANCE OF THIS SOFTWARE.
+ */
+
+#include "lightpipe.h"
+#include <stdlib.h>
+#include <stdio.h>
+#include <X11/Xlib.h>
+#include <X11/Xatom.h>
+#include <X11/Xutil.h>
+
+int
+main (int argc, char **argv)
+{
+    Display		*display;
+    Display		*new_display;
+    Window		window;
+    Window		new = 0;
+    int			new_width, new_height;
+    XLightPipeWindow	*lpw;
+    GC			gc;
+
+    if (argc != 4)
+    {
+	fprintf (stderr, "usage: %s <src-dpy> <window-id> <dst-dpy>\n",
+		 argv[0]);
+	exit (1);
+    }
+	
+    display = XOpenDisplay (argv[1]);
+    window = strtol (argv[2], 0, 0);
+    new_display = XOpenDisplay (argv[3]);
+    XLightPipeInit ();
+    XLightPipeAttendWindow (display, window);
+    gc = XCreateGC (new_display, RootWindow (new_display, DefaultScreen (new_display)), 0, 0);
+    for (;;)
+    {
+	lpw = XLightPipeCheckWindow (display, window, True);
+	if (!new)
+	{
+	    XWMHints		    *wmhints;
+	    XSizeHints		    *normalhints;
+	    XClassHint		    *classhint;
+	    char		    *name = "lightpipe";
+	    new = XCreateSimpleWindow (new_display, RootWindow (new_display,
+							DefaultScreen (new_display)),
+				       0, 0, lpw->geometry.width,
+				       lpw->geometry.height,
+				       0, 0, 0);
+	    normalhints = XAllocSizeHints ();
+	    normalhints->flags = 0;
+	    normalhints->x = 0;
+	    normalhints->y = 0;
+	    normalhints->width = lpw->geometry.width;
+	    normalhints->height = lpw->geometry.height;
+
+	    classhint = XAllocClassHint ();
+	    classhint->res_name = "lightpipe";
+	    classhint->res_class = "Lightpipe";
+
+	    wmhints = XAllocWMHints ();
+	    wmhints->flags = InputHint;
+	    wmhints->input = False;
+
+	    Xutf8SetWMProperties (new_display, new, name, name, 0, 0, 
+				  normalhints, wmhints, classhint);
+	    XFree (wmhints);
+	    XFree (classhint);
+	    XFree (normalhints);
+
+	    XMapWindow (new_display, new);
+	    new_width = lpw->geometry.width;
+	    new_height = lpw->geometry.height;
+	}
+	if (new_width != lpw->geometry.width ||
+	    new_height != lpw->geometry.height)
+	{
+	    new_width = lpw->geometry.width;
+	    new_height = lpw->geometry.height;
+	    XResizeWindow (new_display, new, new_width, new_height);
+	}
+	printf ("%dx%d+%d+%d\n",
+		lpw->damage.width, lpw->damage.height, lpw->damage.x, lpw->damage.y);
+	XPutImage (new_display, new, gc, lpw->image,
+		   lpw->damage.x, lpw->damage.y,
+		   lpw->damage.x, lpw->damage.y,
+		   lpw->damage.width,
+		   lpw->damage.height);
+	XFlush (new_display);
+	XLightPipeRelease (display, lpw);
+    }
+    return 0;
+}
diff --git a/lightpipe.h b/lightpipe.h
new file mode 100644
index 0000000..de12b42
--- /dev/null
+++ b/lightpipe.h
@@ -0,0 +1,86 @@
+/*
+ * $Id$
+ *
+ * Copyright © 2004 Keith Packard
+ *
+ * Permission to use, copy, modify, distribute, and sell this software and its
+ * documentation for any purpose is hereby granted without fee, provided that
+ * the above copyright notice appear in all copies and that both that
+ * copyright notice and this permission notice appear in supporting
+ * documentation, and that the name of Keith Packard not be used in
+ * advertising or publicity pertaining to distribution of the software without
+ * specific, written prior permission.  Keith Packard makes no
+ * representations about the suitability of this software for any purpose.  It
+ * is provided "as is" without express or implied warranty.
+ *
+ * KEITH PACKARD DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE,
+ * INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO
+ * EVENT SHALL KEITH PACKARD BE LIABLE FOR ANY SPECIAL, INDIRECT OR
+ * CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE,
+ * DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER
+ * TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
+ * PERFORMANCE OF THIS SOFTWARE.
+ */
+
+#include <X11/Xlib.h>
+
+typedef struct {
+    XRectangle	geometry;	/* in screen space, read-only */
+    int		border_width;	/* read-only */
+    XRectangle	damage;		/* in window space, client may modify */
+    XImage	*image;		/* read-only */
+} XLightPipeWindow;
+
+/*
+ * Initialize library. Must be called before first XOpenDisplay call
+ */
+
+void
+XLightPipeInit (void);
+
+/*
+ * Start monitoring window, returns success boolean
+ */
+
+Bool
+XLightPipeAttendWindow (Display *display, Window window);
+
+/*
+ * Start monitoring all sub windows; create/destroy handled
+ * automagically
+ */
+
+Bool
+XLightPipeAttendSubwindows (Display *display, Window window);
+
+/*
+ * Stop monitoring window.  Note that monitoring is automatically
+ * disabled if the window is destroyed
+ */
+
+void
+XLightPipeIgnoreWindow (Display *display, Window window);
+
+/*
+ * Returns XLightPipeWindow structure if there is any damage,
+ * else 0.  The XLightPipeWindow structure is 'locked' on return
+ * and must be 'released' before any other calls to the library
+ * including XLightPipeIgnoreWindow.
+ */
+
+XLightPipeWindow *
+XLightPipeCheckWindow (Display *display, Window window, Bool block);
+
+/*
+ * Returns a random window containing damage, 0 if none
+ */
+XLightPipeWindow *
+XLightPipeCheckAny (Display *display, Bool block);
+
+/*
+ * Release the XLightPipeWindow structure so that
+ * additional damage can be added.
+ */
+
+void
+XLightPipeRelease (Display *display, XLightPipeWindow *lpw);
diff --git a/lightpipe.pc.in b/lightpipe.pc.in
new file mode 100644
index 0000000..879b051
--- /dev/null
+++ b/lightpipe.pc.in
@@ -0,0 +1,10 @@
+prefix=@prefix@
+exec_prefix=@exec_prefix@
+libdir=@libdir@
+includedir=@includedir@
+
+Name: lightpipe
+Description: Light Pipe  Library
+Version: @PACKAGE_VERSION@
+Cflags: -I${includedir} @LIGHTPIPE_CFLAGS@
+Libs: -L${libdir} -llightpipe @LIGHTPIPE_LIBS@ @X_LIBS@
diff --git a/lpapi.c b/lpapi.c
new file mode 100644
index 0000000..5579093
--- /dev/null
+++ b/lpapi.c
@@ -0,0 +1,125 @@
+/*
+ * $Id$
+ *
+ * Copyright © 2004 Keith Packard
+ *
+ * Permission to use, copy, modify, distribute, and sell this software and its
+ * documentation for any purpose is hereby granted without fee, provided that
+ * the above copyright notice appear in all copies and that both that
+ * copyright notice and this permission notice appear in supporting
+ * documentation, and that the name of Keith Packard not be used in
+ * advertising or publicity pertaining to distribution of the software without
+ * specific, written prior permission.  Keith Packard makes no
+ * representations about the suitability of this software for any purpose.  It
+ * is provided "as is" without express or implied warranty.
+ *
+ * KEITH PACKARD DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE,
+ * INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO
+ * EVENT SHALL KEITH PACKARD BE LIABLE FOR ANY SPECIAL, INDIRECT OR
+ * CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE,
+ * DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER
+ * TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
+ * PERFORMANCE OF THIS SOFTWARE.
+ */
+
+#include "lpint.h"
+
+/*
+ * Initialize library. Must be called before first XOpenDisplay call
+ */
+
+void
+XLightPipeInit (void)
+{
+}
+
+/*
+ * Start monitoring window, returns success boolean
+ */
+
+Bool
+XLightPipeAttendWindow (Display *display, Window window)
+{
+    return add_window  (display, window) ? True : False;
+}
+
+/*
+ * Start monitoring all sub windows; create/destroy handled
+ * automagically
+ */
+
+Bool
+XLightPipeAttendSubwindows (Display *display, Window window)
+{
+    return False;
+}
+
+/*
+ * Stop monitoring window.  Note that monitoring is automatically
+ * disabled if the window is destroyed
+ */
+
+void
+XLightPipeIgnoreWindow (Display *display, Window window)
+{
+    remove_window (display, window);
+}
+
+/*
+ * Returns XLightPipeWindow structure if there is any damage,
+ * else 0.  The XLightPipeWindow structure is 'locked' on return
+ * and must be 'released' before any other calls to the library
+ * including XLightPipeIgnoreWindow.
+ */
+
+XLightPipeWindow *
+XLightPipeCheckWindow (Display *display, Window window, Bool block)
+{
+    light_pipe_window	*lpw;
+    
+    do {
+	process_events (display);
+	for (lpw = find_damaged (display); lpw; lpw = lpw->next_damaged)
+	{
+	    if (lpw->window == window)
+	    {
+		update_window (lpw);
+		return &lpw->public;
+	    }
+	}
+    } while (!block || await_event (display));
+    return 0;
+}
+
+/*
+ * Returns a random window containing damage, 0 if none
+ */
+XLightPipeWindow *
+XLightPipeCheckAny (Display *display, Bool block)
+{
+    light_pipe_window	*lpw;
+    
+    do {
+	process_events (display);
+	lpw = find_damaged (display);
+	if (lpw)
+	{
+	    update_window (lpw);
+	    return &lpw->public;
+	}
+    } while (!block || await_event (display));
+    return 0;
+}
+
+/*
+ * Release the XLightPipeWindow structure so that
+ * additional damage can be added.
+ */
+
+void
+XLightPipeRelease (Display *display, XLightPipeWindow *xlpw)
+{
+    light_pipe_window	*lpw = (light_pipe_window *) xlpw;
+
+    undamage_window (lpw);
+}
diff --git a/lpdamage.c b/lpdamage.c
new file mode 100644
index 0000000..d87c66a
--- /dev/null
+++ b/lpdamage.c
@@ -0,0 +1,126 @@
+/*
+ * $Id$
+ *
+ * Copyright © 2004 Keith Packard
+ *
+ * Permission to use, copy, modify, distribute, and sell this software and its
+ * documentation for any purpose is hereby granted without fee, provided that
+ * the above copyright notice appear in all copies and that both that
+ * copyright notice and this permission notice appear in supporting
+ * documentation, and that the name of Keith Packard not be used in
+ * advertising or publicity pertaining to distribution of the software without
+ * specific, written prior permission.  Keith Packard makes no
+ * representations about the suitability of this software for any purpose.  It
+ * is provided "as is" without express or implied warranty.
+ *
+ * KEITH PACKARD DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE,
+ * INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO
+ * EVENT SHALL KEITH PACKARD BE LIABLE FOR ANY SPECIAL, INDIRECT OR
+ * CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE,
+ * DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER
+ * TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
+ * PERFORMANCE OF THIS SOFTWARE.
+ */
+
+#include "lpint.h"
+
+static void
+add_damage (light_pipe_window *lpw)
+{
+    light_pipe_display	*lpd = find_display (lpw->display);
+    light_pipe_window	**prev;
+
+    if (!lpd)
+	return;
+    for (prev = &lpd->damaged; *prev; prev = &(*prev)->next_damaged)
+	if ((*prev) == lpw)
+	    return;
+    lpw->next_damaged = *prev;
+    *prev = lpw;
+}
+
+static void
+remove_damage (light_pipe_window *lpw)
+{
+    light_pipe_display	*lpd = find_display (lpw->display);
+    light_pipe_window	**prev;
+    
+    if (!lpd)
+	return;
+    for (prev = &lpd->damaged; *prev; prev = &(*prev)->next_damaged)
+	if ((*prev) == lpw)
+	{
+	    *prev = lpw->next_damaged;
+	    break;
+	}
+}
+
+void
+damage_window (light_pipe_window *lpw, int x, int y, int width, int height)
+{
+    add_damage (lpw);
+    if (lpw->public.damage.width == 0)
+    {
+	lpw->public.damage.x = x;
+	lpw->public.damage.y = y;
+	lpw->public.damage.width = width;
+	lpw->public.damage.height = height;
+    }
+    else
+    {
+	int old_x2 = lpw->public.damage.x + lpw->public.damage.width;
+	int old_y2 = lpw->public.damage.y + lpw->public.damage.height;
+	int new_x2 = x + width;
+	int new_y2 = y + height;
+
+	if (x < lpw->public.damage.x)
+	    lpw->public.damage.x = x;
+	if (new_x2 > old_x2)
+	    old_x2 = new_x2;
+	lpw->public.damage.width = old_x2 - lpw->public.damage.x;
+	if (y < lpw->public.damage.y)
+	    lpw->public.damage.y = y;
+	if (new_y2 > old_y2)
+	    old_y2 = new_y2;
+	lpw->public.damage.height = old_y2 - lpw->public.damage.y;
+    }
+}
+
+void
+update_window (light_pipe_window *lpw)
+{
+    if (lpw->public.damage.width && lpw->public.damage.height)
+    {
+	XFixesSetRegion (lpw->display,
+			 lpw->repair,
+			 &lpw->public.damage,
+			 1);
+	XDamageSubtract (lpw->display,
+			 lpw->damage,
+			 lpw->repair,
+			 None);
+	update_region (lpw, 
+		       lpw->public.damage.x,
+		       lpw->public.damage.y,
+		       lpw->public.damage.width,
+		       lpw->public.damage.height);
+	XSync (lpw->display, False);
+    }
+}
+
+void
+undamage_window (light_pipe_window *lpw)
+{
+    remove_damage (lpw);
+    lpw->public.damage.x = lpw->public.damage.y = 0;
+    lpw->public.damage.width = lpw->public.damage.height = 0;
+}
+
+light_pipe_window *
+find_damaged (Display *display)
+{
+    light_pipe_display	*lpd;
+
+    lpd = find_display (display);
+    return lpd->damaged;
+}
diff --git a/lpdisplay.c b/lpdisplay.c
new file mode 100644
index 0000000..cd666ec
--- /dev/null
+++ b/lpdisplay.c
@@ -0,0 +1,68 @@
+/*
+ * $Id$
+ *
+ * Copyright © 2004 Keith Packard
+ *
+ * Permission to use, copy, modify, distribute, and sell this software and its
+ * documentation for any purpose is hereby granted without fee, provided that
+ * the above copyright notice appear in all copies and that both that
+ * copyright notice and this permission notice appear in supporting
+ * documentation, and that the name of Keith Packard not be used in
+ * advertising or publicity pertaining to distribution of the software without
+ * specific, written prior permission.  Keith Packard makes no
+ * representations about the suitability of this software for any purpose.  It
+ * is provided "as is" without express or implied warranty.
+ *
+ * KEITH PACKARD DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE,
+ * INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO
+ * EVENT SHALL KEITH PACKARD BE LIABLE FOR ANY SPECIAL, INDIRECT OR
+ * CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE,
+ * DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER
+ * TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
+ * PERFORMANCE OF THIS SOFTWARE.
+ */
+
+#include "lpint.h"
+
+static Bool
+init_display (light_pipe_display *lpd)
+{
+    if (!XFixesQueryExtension (lpd->display, 
+			       &lpd->xfixes.event_base,
+			       &lpd->xfixes.error_base))
+	return False;
+    if (!XDamageQueryExtension (lpd->display, 
+				&lpd->damage.event_base,
+				&lpd->damage.error_base))
+	return False;
+    if (!XCompositeQueryExtension (lpd->display,
+				   &lpd->composite.event_base,
+				   &lpd->composite.error_base))
+	return False;
+    return True;
+}
+
+light_pipe_display *
+find_display (Display *display)
+{
+    light_pipe_display	*lpd;
+
+    if (XFindContext (display, 0, lp_context (), (XPointer *) &lpd) == 0)
+	return lpd;
+    lpd = malloc (sizeof (light_pipe_display));
+    if (!lpd)
+	return 0;
+    lpd->display = display;
+    lpd->damaged = 0;
+    if (!init_display (lpd))
+    {
+	free (lpd);
+	return 0;
+    }
+    if (XSaveContext (display, 0, lp_context (), (char *) lpd) != 0)
+    {
+	free (lpd);
+	return 0;
+    }
+    return lpd;
+}
diff --git a/lpevent.c b/lpevent.c
new file mode 100644
index 0000000..334fe98
--- /dev/null
+++ b/lpevent.c
@@ -0,0 +1,114 @@
+/*
+ * $Id$
+ *
+ * Copyright © 2004 Keith Packard
+ *
+ * Permission to use, copy, modify, distribute, and sell this software and its
+ * documentation for any purpose is hereby granted without fee, provided that
+ * the above copyright notice appear in all copies and that both that
+ * copyright notice and this permission notice appear in supporting
+ * documentation, and that the name of Keith Packard not be used in
+ * advertising or publicity pertaining to distribution of the software without
+ * specific, written prior permission.  Keith Packard makes no
+ * representations about the suitability of this software for any purpose.  It
+ * is provided "as is" without express or implied warranty.
+ *
+ * KEITH PACKARD DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE,
+ * INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO
+ * EVENT SHALL KEITH PACKARD BE LIABLE FOR ANY SPECIAL, INDIRECT OR
+ * CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE,
+ * DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER
+ * TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
+ * PERFORMANCE OF THIS SOFTWARE.
+ */
+
+#include "lpint.h"
+
+static void
+process_destroy_notify (XDestroyWindowEvent *event)
+{
+    remove_window (event->display, event->window);
+}
+
+static void
+process_configure_notify (XConfigureEvent *event)
+{
+    light_pipe_window	*lpw = find_window (event->display, event->window);
+
+    if (!lpw)
+	return;
+    if (event->width != lpw->public.geometry.width ||
+	event->height != lpw->public.geometry.height)
+    {
+	lpw->public.geometry.width = event->width;
+	lpw->public.geometry.height = event->height;
+	destroy_window_image (lpw);
+	create_window_image (lpw);
+	damage_window (lpw, 0, 0, event->width, event->height);
+    }
+    lpw->public.geometry.x = event->x;
+    lpw->public.geometry.y = event->y;
+    lpw->public.border_width = event->border_width;
+}
+
+static void
+process_damage_notify (XDamageNotifyEvent *event)
+{
+    light_pipe_window	*lpw = find_window (event->display, event->drawable);
+
+    if (!lpw)
+	return;
+    damage_window (lpw, 
+		   event->area.x,
+		   event->area.y,
+		   event->area.width,
+		   event->area.height);
+}
+
+static void
+process_event (XEvent *event)
+{
+    Display		*display = event->xany.display;
+    light_pipe_display	*lpd = find_display (display);
+
+    if (!lpd)
+	return;
+    switch (event->type) {
+    case DestroyNotify:
+	process_destroy_notify ((XDestroyWindowEvent *) event);
+	return;
+    case ConfigureNotify:
+	process_configure_notify ((XConfigureEvent *) event);
+	return;
+    default:
+	break;
+    }
+    switch (event->type - lpd->damage.event_base) {
+    case XDamageNotify:
+	process_damage_notify ((XDamageNotifyEvent *) event);
+	return;
+    default:
+	break;
+    }
+}
+
+Bool
+await_event (Display *display)
+{
+    XEvent  event;
+
+    XPeekEvent (display, &event);
+    return True;
+}
+
+void
+process_events (Display *display)
+{
+    while (XPending (display))
+    {
+	XEvent	event;
+
+	XNextEvent (display, &event);
+	process_event (&event);
+    }
+}
diff --git a/lpimage.c b/lpimage.c
new file mode 100644
index 0000000..f797b6c
--- /dev/null
+++ b/lpimage.c
@@ -0,0 +1,112 @@
+/*
+ * $Id$
+ *
+ * Copyright © 2004 Keith Packard
+ *
+ * Permission to use, copy, modify, distribute, and sell this software and its
+ * documentation for any purpose is hereby granted without fee, provided that
+ * the above copyright notice appear in all copies and that both that
+ * copyright notice and this permission notice appear in supporting
+ * documentation, and that the name of Keith Packard not be used in
+ * advertising or publicity pertaining to distribution of the software without
+ * specific, written prior permission.  Keith Packard makes no
+ * representations about the suitability of this software for any purpose.  It
+ * is provided "as is" without express or implied warranty.
+ *
+ * KEITH PACKARD DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE,
+ * INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO
+ * EVENT SHALL KEITH PACKARD BE LIABLE FOR ANY SPECIAL, INDIRECT OR
+ * CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE,
+ * DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER
+ * TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
+ * PERFORMANCE OF THIS SOFTWARE.
+ */
+
+#include "lpint.h"
+
+Bool
+create_window_image (light_pipe_window *lpw)
+{
+    int		image_size;
+    XGCValues	gcv;
+    
+    lpw->public.image = XCreateImage (lpw->display,
+				      lpw->visual,
+				      lpw->depth,
+				      ZPixmap,
+				      0,
+				      0,
+				      lpw->public.geometry.width,
+				      lpw->public.geometry.height,
+				      32,
+				      0);
+    if (!lpw->public.image)
+	return False;
+    image_size = (lpw->public.image->bytes_per_line * 
+		  lpw->public.geometry.height);
+    if (!image_size)
+    {
+	XDestroyImage (lpw->public.image);
+	return False;
+    }
+    lpw->shm_info.shmid = shmget (IPC_PRIVATE, image_size, IPC_CREAT|0600);
+    if (lpw->shm_info.shmid < 0)
+    {
+	XDestroyImage (lpw->public.image);
+	lpw->public.image = 0;
+	return False;
+    }
+    lpw->shm_info.shmaddr = (char *) shmat (lpw->shm_info.shmid, 0, 0);
+    if (lpw->shm_info.shmaddr == ((char *) -1))
+    {
+	XDestroyImage (lpw->public.image);
+	lpw->public.image = 0;
+	shmctl (lpw->shm_info.shmid, IPC_RMID, 0);
+	return False;
+    }
+    XShmAttach (lpw->display, &lpw->shm_info);
+    lpw->public.image->data = lpw->shm_info.shmaddr;
+    lpw->public.image->obdata = (char *) &lpw->shm_info;
+    lpw->shm_pixmap = XShmCreatePixmap (lpw->display,
+					lpw->window,
+					lpw->public.image->data,
+					&lpw->shm_info,
+					lpw->public.geometry.width,
+					lpw->public.geometry.height,
+					lpw->depth);
+    gcv.graphics_exposures = False;
+    gcv.subwindow_mode = IncludeInferiors;
+    lpw->shm_gc = XCreateGC (lpw->display,
+			     lpw->window,
+			     GCGraphicsExposures|GCSubwindowMode,
+			     &gcv);
+    return True;
+}
+
+void
+destroy_window_image (light_pipe_window *lpw)
+{
+    if (lpw->public.image)
+    {
+	XShmDetach (lpw->display, &lpw->shm_info);
+	XSync (lpw->display, False);
+	(void) shmdt (&lpw->shm_info.shmaddr);
+	(void) shmctl (lpw->shm_info.shmid, IPC_RMID, 0);
+	lpw->public.image->data = 0;
+	lpw->public.image->obdata = 0;
+	XDestroyImage (lpw->public.image);
+	XFreePixmap (lpw->display, lpw->shm_pixmap);
+	XFreeGC (lpw->display, lpw->shm_gc);
+	lpw->public.image = 0;
+    }
+}
+
+void
+update_region (light_pipe_window *lpw, int x, int y, int width, int height)
+{
+    XCopyArea (lpw->display,
+	       lpw->window,
+	       lpw->shm_pixmap,
+	       lpw->shm_gc,
+	       x, y, width, height, x, y);
+}
diff --git a/lpinit.c b/lpinit.c
new file mode 100644
index 0000000..4c3aa87
--- /dev/null
+++ b/lpinit.c
@@ -0,0 +1,83 @@
+/*
+ * $Id$
+ *
+ * Copyright © 2004 Keith Packard
+ *
+ * Permission to use, copy, modify, distribute, and sell this software and its
+ * documentation for any purpose is hereby granted without fee, provided that
+ * the above copyright notice appear in all copies and that both that
+ * copyright notice and this permission notice appear in supporting
+ * documentation, and that the name of Keith Packard not be used in
+ * advertising or publicity pertaining to distribution of the software without
+ * specific, written prior permission.  Keith Packard makes no
+ * representations about the suitability of this software for any purpose.  It
+ * is provided "as is" without express or implied warranty.
+ *
+ * KEITH PACKARD DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE,
+ * INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO
+ * EVENT SHALL KEITH PACKARD BE LIABLE FOR ANY SPECIAL, INDIRECT OR
+ * CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE,
+ * DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER
+ * TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
+ * PERFORMANCE OF THIS SOFTWARE.
+ */
+
+#include "lpint.h"
+
+Bool
+init_window (Display *display, Window window, light_pipe_window *lpw)
+{
+    XWindowAttributes	attr;
+    
+    lpw->display = display;
+    lpw->window = window;
+    XSelectInput (display, window, LP_WINDOW_EVENT_MASK);
+    if (!XGetWindowAttributes (display, window, &attr))
+	return False;
+    
+    lpw->public.geometry.x = attr.x;
+    lpw->public.geometry.y = attr.y;
+    lpw->public.geometry.width = attr.width;
+    lpw->public.geometry.height = attr.height;
+    lpw->public.border_width = attr.border_width;
+
+    lpw->public.damage.x = 0;
+    lpw->public.damage.y = 0;
+    lpw->public.damage.width = 0;
+    lpw->public.damage.height = 0;
+    
+    lpw->public.image = 0;
+
+    lpw->display = display;
+    lpw->window = window;
+    lpw->visual = attr.visual;
+    lpw->depth = attr.depth;
+
+    lpw->damage = XDamageCreate (display, window, XDamageReportBoundingBox);
+
+    lpw->repair = XFixesCreateRegion (display, 0, 0);
+
+    XCompositeRedirectWindow (display, window, CompositeRedirectAutomatic);
+
+    lpw->next_damaged = 0;
+
+    if (!create_window_image (lpw))
+    {
+	XSelectInput (display, window, 0);
+	return False;
+    }
+    
+    if (attr.map_state == IsViewable)
+	damage_window (lpw, 0, 0, attr.width, attr.height);
+    return True;
+}
+
+void
+fini_window (Display *display, Window window, light_pipe_window *lpw)
+{
+    XSelectInput (display, window, 0);
+    undamage_window (lpw);
+    XCompositeUnredirectWindow (display, window, CompositeRedirectAutomatic);
+    XDamageDestroy (display, lpw->damage);
+    destroy_window_image (lpw);
+}
diff --git a/lpint.h b/lpint.h
new file mode 100644
index 0000000..7386bd3
--- /dev/null
+++ b/lpint.h
@@ -0,0 +1,127 @@
+/*
+ * $Id$
+ *
+ * Copyright © 2004 Keith Packard
+ *
+ * Permission to use, copy, modify, distribute, and sell this software and its
+ * documentation for any purpose is hereby granted without fee, provided that
+ * the above copyright notice appear in all copies and that both that
+ * copyright notice and this permission notice appear in supporting
+ * documentation, and that the name of Keith Packard not be used in
+ * advertising or publicity pertaining to distribution of the software without
+ * specific, written prior permission.  Keith Packard makes no
+ * representations about the suitability of this software for any purpose.  It
+ * is provided "as is" without express or implied warranty.
+ *
+ * KEITH PACKARD DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE,
+ * INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO
+ * EVENT SHALL KEITH PACKARD BE LIABLE FOR ANY SPECIAL, INDIRECT OR
+ * CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE,
+ * DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER
+ * TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
+ * PERFORMANCE OF THIS SOFTWARE.
+ */
+
+#include "lightpipe.h"
+#include <X11/extensions/Xdamage.h>
+#include <X11/extensions/Xcomposite.h>
+#include <X11/extensions/XShm.h>
+#include <X11/Xresource.h>
+#include <X11/Xutil.h>
+#include <sys/types.h>
+#include <sys/ipc.h>
+#include <sys/shm.h>
+#include <stdlib.h>
+
+#define LP_WINDOW_EVENT_MASK (StructureNotifyMask)
+
+typedef struct _light_pipe_window {
+    XLightPipeWindow	public;
+    Display		*display;
+    Window		window;
+    Visual		*visual;
+    int			depth;
+    XShmSegmentInfo	shm_info;
+    Pixmap		shm_pixmap;
+    GC			shm_gc;
+    Damage		damage;
+    XserverRegion	repair;
+    struct _light_pipe_window	*next_damaged;
+} light_pipe_window;
+
+typedef struct _light_pipe_extension {
+    int			event_base;
+    int			error_base;
+} light_pipe_extension;
+
+typedef struct _light_pipe_display {
+    Display		    *display;
+    light_pipe_window	    *damaged;
+    light_pipe_extension    xfixes;
+    light_pipe_extension    damage;
+    light_pipe_extension    composite;
+} light_pipe_display;
+
+/* lpdamage.c */
+
+/* mark area as damaged */
+void
+damage_window (light_pipe_window *lpw, int x, int y, int width, int height);
+
+/* synchronize local copy of window with remote */
+void
+update_window (light_pipe_window *lpw);
+
+/* mark window as entirely undamaged */
+void
+undamage_window (light_pipe_window *lpw);
+
+light_pipe_window *
+find_damaged (Display *display);
+
+/* lpdisplay.c */
+
+light_pipe_display *
+find_display (Display *display);
+
+/* lpevent.c */
+
+Bool
+await_event (Display *display);
+
+void
+process_events (Display *display);
+
+/* lptable.c */
+
+int
+lp_context (void);
+
+light_pipe_window *
+find_window (Display *display, Window window);
+
+light_pipe_window *
+add_window (Display *display, Window window);
+
+void
+remove_window (Display *display, Window window);
+
+/* lpimage.c */
+
+Bool
+create_window_image (light_pipe_window *lpw);
+
+void
+destroy_window_image (light_pipe_window *lpw);
+ 
+void
+update_region (light_pipe_window *lpw, int x, int y, int width, int height);
+
+/* lpinit.c */
+
+Bool
+init_window (Display *display, Window window, light_pipe_window *lpw);
+
+void
+fini_window (Display *display, Window window, light_pipe_window *lpw);
+
diff --git a/lptable.c b/lptable.c
new file mode 100644
index 0000000..12aad9b
--- /dev/null
+++ b/lptable.c
@@ -0,0 +1,81 @@
+/*
+ * $Id$
+ *
+ * Copyright © 2004 Keith Packard
+ *
+ * Permission to use, copy, modify, distribute, and sell this software and its
+ * documentation for any purpose is hereby granted without fee, provided that
+ * the above copyright notice appear in all copies and that both that
+ * copyright notice and this permission notice appear in supporting
+ * documentation, and that the name of Keith Packard not be used in
+ * advertising or publicity pertaining to distribution of the software without
+ * specific, written prior permission.  Keith Packard makes no
+ * representations about the suitability of this software for any purpose.  It
+ * is provided "as is" without express or implied warranty.
+ *
+ * KEITH PACKARD DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE,
+ * INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO
+ * EVENT SHALL KEITH PACKARD BE LIABLE FOR ANY SPECIAL, INDIRECT OR
+ * CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE,
+ * DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER
+ * TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
+ * PERFORMANCE OF THIS SOFTWARE.
+ */
+
+#include "lpint.h"
+
+int
+lp_context (void)
+{
+    static int	context;
+
+    while (!context)
+	context = XUniqueContext ();
+    return context;
+}
+
+light_pipe_window *
+find_window (Display *display, Window window)
+{
+    light_pipe_window	*lpw;
+
+    if (XFindContext (display, window, lp_context (), (XPointer *) &lpw) != 0)
+	return 0;
+    return lpw;
+}
+
+light_pipe_window *
+add_window (Display *display, Window window)
+{
+    light_pipe_window	*lpw;
+
+    if (XFindContext (display, window, lp_context (), (XPointer *) &lpw) == 0)
+	return 0;
+    lpw = malloc (sizeof (light_pipe_window));
+    if (!lpw)
+	return 0;
+    if (XSaveContext (display, window, lp_context (), (char *) lpw) != 0)
+    {
+	free (lpw);
+	return 0;
+    }
+    if (!init_window (display, window, lpw))
+    {
+	XDeleteContext (display, window, lp_context());
+	free (lpw);
+	return 0;
+    }
+    return lpw;
+}
+
+void
+remove_window (Display *display, Window window)
+{
+    light_pipe_window	*lpw;
+
+    if (!XFindContext (display, window, lp_context (), (XPointer *) &lpw))
+	return;
+    (void) XDeleteContext (display, window, lp_context ());
+    fini_window (display, window, lpw);
+    free (lpw);
+}