Death to Multibuffer extension

The rationale behind is because no sane application will use this when we have
modern APIs such DRI2. Besides, as a fact, xfree86 server has already
deprecated this extension in 1998:

    http://www.xfree86.org/3.3.6/isc7.html

Signed-off-by: Tiago Vignatti <tiago.vignatti@nokia.com>

13 files changed, 0 insertions, 3725 deletions

diff --git a/Xext/Makefile.am b/Xext/Makefile.am
index 53cbc1fbd..fa007aa91 100644
--- a/Xext/Makefile.am
+++ b/Xext/Makefile.am
@@ -99,13 +99,6 @@ BUILTIN_SRCS += $(XCALIBRATE_SRCS)
 # XCalibrate needs tslib
 endif
 
-# Multi-buffering extension
-MULTIBUFFER_SRCS = mbuf.c
-EXTRA_MULTIBUFFER_SRCS = mbufbf.c mbufpx.c
-if MULTIBUFFER
-MODULE_SRCS  += $(MULTIBUFFER_SRCS)
-endif
-
 # XF86 Big Font extension
 BIGFONT_SRCS = xf86bigfont.c xf86bigfontsrv.h
 if XF86BIGFONT
@@ -140,8 +133,6 @@ EXTRA_DIST = \
 	$(XSELINUX_SRCS) \
 	$(XCALIBRATE_SRCS) \
 	$(XINERAMA_SRCS) \
-	$(MULTIBUFFER_SRCS) \
-	$(EXTRA_MULTIBUFFER_SRCS) \
 	$(FONTCACHE_SRCS) \
 	$(BIGFONT_SRCS) \
 	$(DPMS_SRCS) \
diff --git a/Xext/mbuf.c b/Xext/mbuf.c
deleted file mode 100644
index aacb9cfde..000000000
--- a/Xext/mbuf.c
+++ /dev/null
@@ -1,2014 +0,0 @@
-/************************************************************
-
-Copyright 1989, 1998  The Open Group
-
-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.
-
-The above copyright notice and this permission notice shall be included in
-all copies or substantial portions of the Software.
-
-THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
-IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
-FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL THE
-OPEN GROUP BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN
-AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
-CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
-
-Except as contained in this notice, the name of The Open Group shall not be
-used in advertising or otherwise to promote the sale, use or other dealings
-in this Software without prior written authorization from The Open Group.
-
-********************************************************/
-
-#ifdef HAVE_DIX_CONFIG_H
-#include <dix-config.h>
-#endif
-
-#include <X11/X.h>
-#include <X11/Xproto.h>
-#include "window.h"
-#include "os.h"
-#include "windowstr.h"
-#include "scrnintstr.h"
-#include "pixmapstr.h"
-#include "gcstruct.h"
-#include "extnsionst.h"
-#include "dixstruct.h"
-#include "resource.h"
-#include "opaque.h"
-#include "sleepuntil.h"
-#include "inputstr.h"
-#include <X11/extensions/multibufconst.h>
-#include <X11/extensions/multibufproto.h>
-
-#include <stdio.h>
-#if !defined(WIN32)
-#include <sys/time.h>
-#endif
-
-/* given an OtherClientPtr obj, get the ClientPtr */
-#define rClient(obj) (clients[CLIENT_ID((obj)->resource)])
-
-/* given a MultibufferPtr b, get the ClientPtr */
-#define bClient(b)   (clients[CLIENT_ID(b->pPixmap->drawable.id)])
-
-#define ValidEventMasks (ExposureMask|MultibufferClobberNotifyMask|MultibufferUpdateNotifyMask)
-
-/* The _Multibuffer and _Multibuffers structures below refer to each other,
- * so we need this forward declaration
- */
-typedef struct _Multibuffers	*MultibuffersPtr;
-
-/*
- * per-Multibuffer data
- */
-typedef struct _Multibuffer {
-    MultibuffersPtr pMultibuffers;  /* associated window data */
-    Mask	    eventMask;	    /* MultibufferClobberNotifyMask|ExposureMask|MultibufferUpdateNotifyMask */
-    Mask	    otherEventMask; /* mask of all other clients event masks */
-    OtherClients    *otherClients;  /* other clients that want events */
-    int		    number;	    /* index of this buffer into array */
-    int		    side;	    /* always Mono */
-    int		    clobber;	    /* Unclobbered, PartiallyClobbered, FullClobbered */
-    PixmapPtr	    pPixmap;	    /* associated pixmap */
-} MultibufferRec, *MultibufferPtr;
-
-/*
- * per-window data
- */
-
-typedef struct _Multibuffers {
-    WindowPtr	pWindow;		/* associated window */
-    int		numMultibuffer;		/* count of buffers */
-    int		refcnt;			/* ref count for delete */
-    int		displayedMultibuffer;	/* currently active buffer */
-    int		updateAction;		/* Undefined, Background, Untouched, Copied */
-    int		updateHint;		/* Frequent, Intermittent, Static */
-    int		windowMode;		/* always Mono */
-
-    TimeStamp	lastUpdate;		/* time of last update */
-
-    unsigned short	width, height;	/* last known window size */
-    short		x, y;		/* for static gravity */
-
-    MultibufferPtr	buffers;        /* array of numMultibuffer buffers */
-} MultibuffersRec;
-
-/*
- * per-screen data
- */
-typedef struct _MultibufferScreen {
-    PositionWindowProcPtr PositionWindow;		/* pWin, x,y */
-} MultibufferScreenRec, *MultibufferScreenPtr;
-
-/*
- * per display-image-buffers request data.
- */
-
-typedef struct _DisplayRequest {
-    struct _DisplayRequest	*next;
-    TimeStamp			activateTime;
-    ClientPtr			pClient;
-    XID				id;
-} DisplayRequestRec, *DisplayRequestPtr;
-
-#define DestroyWindowMask		(1L<<0)
-#define PositionWindowMask		(1L<<1)
-#define PostValidateTreeMask		(1L<<2)
-#define ClipNotifyMask			(1L<<3)
-#define WindowExposuresMask		(1L<<4)
-#define CopyWindowMask			(1L<<5)
-#define ClearToBackgroundMask		(1L<<6)
-#define ChangeWindowAttributesMask	(1L<<7)
-
-extern int		MultibufferScreenIndex;
-extern int		MultibufferWindowIndex;
-
-extern RESTYPE		MultibufferDrawableResType;
-
-extern void		MultibufferUpdate(	/* pMbuffer, time */
-				MultibufferPtr /* pMultibuffer */,
-				CARD32 /* time */
-				);
-extern void		MultibufferExpose(	/* pMbuffer, pRegion */
-				MultibufferPtr /* pMultibuffer */,
-				RegionPtr /* pRegion */
-				);
-extern void		MultibufferClobber(	/* pMbuffer */
-				MultibufferPtr /* pMultibuffer */
-				);
-
-typedef struct _mbufWindow	*mbufWindowPtr;
-
-void DestroyImageBuffers (WindowPtr	pWin);
-
-/*
- * per-buffer data
- */
-
-#define MB_DISPLAYED_BUFFER(pMBWindow) \
-    ((pMBWindow)->buffers + (pMBWindow)->displayedMultibuffer)
-
-typedef struct _mbufBuffer {
-    mbufWindowPtr   pMBWindow;	    /* associated window data */
-    Mask	    eventMask;	    /* client event mask */
-    Mask	    otherEventMask; /* union of other clients' event masks */
-    OtherClientsPtr otherClients;   /* other clients that want events */
-    int		    number;	    /* index of this buffer into array */
-    int		    side;	    /* stero side: always Mono */
-    int		    clobber;	    /* clober state */
-    DrawablePtr	    pDrawable;	    /* associated drawable */
-} mbufBufferRec, *mbufBufferPtr;
-
-
-/*
- * per-window data
- */
-
-#define MB_WINDOW_PRIV(pWin) \
-    ((mbufWindowPtr)((pWin)->devPrivates[MultibufferWindowIndex].ptr))
-
-typedef struct _mbufWindow {
-    WindowPtr	pWindow;		/* associated window */
-    int		numMultibuffer;		/* count of buffers */
-    mbufBufferPtr buffers;		/* array of (numMultibuffer) buffers */
-    int		displayedMultibuffer;	/* currently active buffer */
-    int		updateAction;		/* Undefined, Background,
-					   Untouched, Copied */
-    int		updateHint;		/* Frequent, Intermittent, Static */
-    int		windowMode;		/* always Mono */
-    TimeStamp	lastUpdate;		/* time of last update */
-    short		x, y;		/* for static gravity */
-    unsigned short	width, height;	/* last known window size */
-    DevUnion		devPrivate;
-} mbufWindowRec;
-
-
-/*
- * per-screen data
- */
-
-#define MB_SCREEN_PRIV(pScreen) \
-    ((mbufScreenPtr)((pScreen)->devPrivates[MultibufferScreenIndex].ptr))
-
-typedef struct _mbufScreen {
-    long mbufWindowCount;		/* count of multibuffered windows */
-
-    /* Wrap pScreen->DestroyWindow */
-    DestroyWindowProcPtr DestroyWindow;
-    long funcsWrapped;			/* flags which functions are wrapped */
-
-    /* Initialized by device-dependent section */
-    int  nInfo;				/* number of buffer info rec's */
-    xMbufBufferInfo *pInfo;		/* buffer info (for Normal buffers) */
-
-    int  (* CreateImageBuffers)(
-		WindowPtr		/* pWin */,
-		int			/* nbuf */,
-		XID *			/* ids */,
-		int			/* action */,
-		int			/* hint */
-		);
-    void (* DestroyImageBuffers)(
-		WindowPtr		/* pWin */
-		);
-    void (* DisplayImageBuffers)(
-		ScreenPtr		/* pScreen */,
-		mbufBufferPtr *		/* ppMBBuffer */,
-		mbufWindowPtr *		/* ppMBWindow */,
-		int			/* nbuf */
-		);
-    void (* ClearImageBufferArea)(
-		mbufBufferPtr		/* pMBBuffer */,
-		short			/* x */,
-		short			/* y */,
-		unsigned short		/* width */,
-		unsigned short		/* height */,
-		Bool			/* exposures */
-		);
-    Bool (* ChangeMBufferAttributes)(	/* pMBWindow, vmask */
-		/* FIXME */
-		);
-    Bool (* ChangeBufferAttributes)(	/* pMBBuffer, vmask */
-		/* FIXME */
-		);
-    void (* DeleteBufferDrawable)(
-		DrawablePtr		/* pDrawable */
-		);
-    void (* WrapScreenFuncs)(
-		ScreenPtr		/* pScreen */
-		);
-    void (* ResetProc)(
-		ScreenPtr		/* pScreen */
-		);
-    DevUnion	devPrivate;
-} mbufScreenRec, *mbufScreenPtr;
-
-
-/* Privates to mbufScreenRec */
-
-#ifdef _MULTIBUF_PIXMAP_
-#define MB_SCREEN_PRIV_PIXMAP(pScreen) \
-    ((mbufPixmapPrivPtr) MB_SCREEN_PRIV((pScreen))->devPrivate.ptr)
-
-typedef struct _mbufPixmapPriv
-{
-    /* Pointers to wrapped functions */
-    PositionWindowProcPtr PositionWindow;		/* pWin, x,y */
-    long funcsWrapped;			/* flags which functions are wrapped */
-} mbufPixmapPrivRec, *mbufPixmapPrivPtr;
-#endif /* _MULTIBUF_PIXMAP_ */
-
-
-#ifdef _MULTIBUF_BUFFER_
-
-extern int frameWindowPrivateIndex;
-
-#define MB_SCREEN_PRIV_BUFFER(pScreen) \
-    ((mbufBufferPrivPtr) MB_SCREEN_PRIV((pScreen))->devPrivate.ptr)
-
-typedef struct _mbufBufferPriv
-{
-    DevUnion	*frameBuffer;	/* Array of screen framebuffers */
-    DevUnion	selectPlane;	/* Plane(s) that select displayed buffer */
-
-    /*
-     * Note: subtractRgn and unionRgn may overlap. subtractRgn is a union
-     * of all the old clipLists of the windows that are displaying
-     * the backbuffer. unionRgn is the union of all the new clipLists
-     * of the same windows.
-     */
-
-    RegionRec	backBuffer;	/* Area of screen displaying back buffer */
-    RegionRec   subtractRgn;	/* Regions lost to backBuffer   */
-    RegionRec   unionRgn;	/* Regions gained by backBuffer */
-    Bool	rgnChanged;	/* TRUE if "backBuffer" needs to be updated */
-
-    void (* CopyBufferBits)();	/* pMBWindow, srcBufferNum, dstBufferNum */
-    void (* DrawSelectPlane)();	/* pScreen, selectPlane, pRegion, bufferNum */
-
-    /* Pointers to wrapped functions */
-    PostValidateTreeProcPtr	PostValidateTree; /* pParent, pChild, kind */
-    ClipNotifyProcPtr		ClipNotify;       /* pWin, dx, dy */
-    WindowExposuresProcPtr	WindowExposures;  /* pWin, pRegion */
-    CopyWindowProcPtr		CopyWindow;       /* pWin, oldPt, pOldRegion */
-    ClearToBackgroundProcPtr	ClearToBackground; /* pWin, x,y,w,h, sendExpose */
-    ChangeWindowAttributesProcPtr ChangeWindowAttributes; /* pWin, vmask */
-    long funcsWrapped;			/* flags which functions are wrapped */
-    unsigned  inClearToBackground:1;	/* used by WindowExposure */
-} mbufBufferPrivRec, *mbufBufferPrivPtr;
-#endif /* _MULTIBUF_BUFFER_ */
-
-static int		MultibufferEventBase;
-static int		MultibufferErrorBase;
-static int MultibufferScreenPrivKeyIndex;
-static DevPrivateKey MultibufferScreenPrivKey = &MultibufferScreenPrivKeyIndex;
-static int MultibufferWindowPrivKeyIndex;
-static DevPrivateKey MultibufferWindowPrivKey = &MultibufferWindowPrivKeyIndex;
-
-static void		PerformDisplayRequest (
-				MultibuffersPtr * /* ppMultibuffers */,
-				MultibufferPtr * /* pMultibuffer */,
-				int /* nbuf */
-				);
-static Bool		QueueDisplayRequest (
-				ClientPtr /* client */,
-				TimeStamp /* activateTime */
-				);
-
-static void		BumpTimeStamp (
-				TimeStamp * /* ts */,
-				CARD32 /* inc */
-				);
-
-static void		AliasMultibuffer (
-				MultibuffersPtr /* pMultibuffers */,
-				int /* i */
-				);
-static void		RecalculateMultibufferOtherEvents (
-				MultibufferPtr /* pMultibuffer */
-				);
-static int		EventSelectForMultibuffer(
-				MultibufferPtr /* pMultibuffer */,
-				ClientPtr /* client */,
-				Mask /* mask */
-				);
-
-/*
- * The Pixmap associated with a buffer can be found as a resource
- * with this type
- */
-RESTYPE			MultibufferDrawableResType;
-static int		MultibufferDrawableDelete (
-				pointer /* value */,
-				XID /* id */
-				);
-/*
- * The per-buffer data can be found as a resource with this type.
- * the resource id of the per-buffer data is the same as the resource
- * id of the pixmap
- */
-static RESTYPE		MultibufferResType;
-static int		MultibufferDelete (
-				pointer /* value */,
-				XID /* id */
-				);
-
-/*
- * The per-window data can be found as a resource with this type,
- * using the window resource id
- */
-static RESTYPE		MultibuffersResType;
-static int		MultibuffersDelete (
-				pointer /* value */,
-				XID /* id */
-				);
-
-/*
- * Clients other than the buffer creator attach event masks in
- * OtherClient structures; each has a resource of this type.
- */
-static RESTYPE		OtherClientResType;
-static int		OtherClientDelete (
-				pointer /* value */,
-				XID /* id */
-				);
-
-/****************
- * MultibufferExtensionInit
- *
- * Called from InitExtensions in main()
- *
- ****************/
-
-extern DISPATCH_PROC(ProcGetBufferAttributes);
-
-static DISPATCH_PROC(ProcClearImageBufferArea);
-static DISPATCH_PROC(ProcCreateImageBuffers);
-static DISPATCH_PROC(ProcDestroyImageBuffers);
-static DISPATCH_PROC(ProcDisplayImageBuffers);
-static DISPATCH_PROC(ProcGetBufferInfo);
-static DISPATCH_PROC(ProcGetBufferVersion);
-static DISPATCH_PROC(ProcGetMBufferAttributes);
-static DISPATCH_PROC(ProcMultibufferDispatch);
-static DISPATCH_PROC(ProcSetBufferAttributes);
-static DISPATCH_PROC(ProcSetMBufferAttributes);
-static DISPATCH_PROC(SProcClearImageBufferArea);
-static DISPATCH_PROC(SProcCreateImageBuffers);
-static DISPATCH_PROC(SProcDestroyImageBuffers);
-static DISPATCH_PROC(SProcDisplayImageBuffers);
-static DISPATCH_PROC(SProcGetBufferAttributes);
-static DISPATCH_PROC(SProcGetBufferInfo);
-static DISPATCH_PROC(SProcGetBufferVersion);
-static DISPATCH_PROC(SProcGetMBufferAttributes);
-static DISPATCH_PROC(SProcMultibufferDispatch);
-static DISPATCH_PROC(SProcSetBufferAttributes);
-static DISPATCH_PROC(SProcSetMBufferAttributes);
-
-static void		MultibufferResetProc(
-				ExtensionEntry * /* extEntry */
-				);
-static void		SClobberNotifyEvent(
-				xMbufClobberNotifyEvent * /* from */,
-				xMbufClobberNotifyEvent	* /* to */
-				);
-static void		SUpdateNotifyEvent(
-				xMbufUpdateNotifyEvent * /* from */,
-				xMbufUpdateNotifyEvent * /* to */
-				);
-static Bool		MultibufferPositionWindow(
-				WindowPtr /* pWin */,
-				int /* x */,
-				int /* y */
-				);
-
-static void		SetupBackgroundPainter (
-				WindowPtr /* pWin */,
-				GCPtr /* pGC */
-				);
-
-static int		DeliverEventsToMultibuffer (
-				MultibufferPtr /* pMultibuffer */,
-				xEvent * /* pEvents */,
-				int /* count */,
-				Mask /* filter */
-				);
-
-void
-MultibufferExtensionInit()
-{
-    ExtensionEntry	    *extEntry;
-    int			    i, j;
-    ScreenPtr		    pScreen;
-    MultibufferScreenPtr    pMultibufferScreen;
-
-    for (i = 0; i < screenInfo.numScreens; i++)
-    {
-	pScreen = screenInfo.screens[i];
-	if (!(pMultibufferScreen = xalloc (sizeof (MultibufferScreenRec))))
-	{
-	    for (j = 0; j < i; j++)
-		xfree (dixLookupPrivate(&screenInfo.screens[j]->devPrivates, MultibufferScreenPrivKey));
-	    return;
-	}
-	dixSetPrivate(&pScreen->devPrivates, MultibufferScreenPrivKey, pMultibufferScreen);
-	/*
- 	 * wrap PositionWindow to resize the pixmap when the window
-	 * changes size
- 	 */
-	pMultibufferScreen->PositionWindow = pScreen->PositionWindow;
-	pScreen->PositionWindow = MultibufferPositionWindow;
-    }
-    /*
-     * create the resource types
-     */
-    MultibufferDrawableResType =
-	CreateNewResourceType(MultibufferDrawableDelete, "MultibufferDrawable");
-    if (MultiBufferDrawableResType)
-	MultibufferDrawableResType |= RC_DRAWABLE;
-    MultibufferResType = CreateNewResourceType(MultibufferDelete,
-					       "MultibufferBuffer");
-    MultibuffersResType = CreateNewResourceType(MultibuffersDelete,
-						"MultibufferWindow");
-    OtherClientResType = CreateNewResourceType(OtherClientDelete,
-					       "MultibufferOtherClient");
-    if (MultibufferDrawableResType && MultibufferResType &&
-	MultibuffersResType && 	OtherClientResType &&
-	(extEntry = AddExtension(MULTIBUFFER_PROTOCOL_NAME,
-				 MultibufferNumberEvents, 
-				 MultibufferNumberErrors,
-				 ProcMultibufferDispatch, SProcMultibufferDispatch,
-				 MultibufferResetProc, StandardMinorOpcode)))
-    {
-	MultibufferEventBase = extEntry->eventBase;
-	MultibufferErrorBase = extEntry->errorBase;
-	EventSwapVector[MultibufferEventBase + MultibufferClobberNotify] = (EventSwapPtr) SClobberNotifyEvent;
-	EventSwapVector[MultibufferEventBase + MultibufferUpdateNotify] = (EventSwapPtr) SUpdateNotifyEvent;
-    }
-}
-
-/*ARGSUSED*/
-static void
-MultibufferResetProc (extEntry)
-ExtensionEntry	*extEntry;
-{
-    int			    i;
-    ScreenPtr		    pScreen;
-    MultibufferScreenPtr    pMultibufferScreen;
-    
-    for (i = 0; i < screenInfo.numScreens; i++)
-    {
-	pScreen = screenInfo.screens[i];
-	if ((pMultibufferScreen = (MultibufferScreenPtr)dixLookupPrivate(&pScreen->devPrivates, MultibufferScreenPrivKey)))
-	{
-	    pScreen->PositionWindow = pMultibufferScreen->PositionWindow;
-	    xfree (pMultibufferScreen);
-	}
-    }
-}
-
-static int
-ProcGetBufferVersion (client)
-    ClientPtr	client;
-{
-    xMbufGetBufferVersionReply	rep;
-    int		n;
-
-    REQUEST_SIZE_MATCH (xMbufGetBufferVersionReq);
-    rep.type = X_Reply;
-    rep.length = 0;
-    rep.sequenceNumber = client->sequence;
-    rep.majorVersion = MULTIBUFFER_MAJOR_VERSION;
-    rep.minorVersion = MULTIBUFFER_MINOR_VERSION;
-    if (client->swapped) {
-    	swaps(&rep.sequenceNumber, n);
-    	swapl(&rep.length, n);
-    }
-    WriteToClient(client, sizeof (xMbufGetBufferVersionReply), (char *)&rep);
-    return (client->noClientException);
-}
-
-static void
-SetupBackgroundPainter (pWin, pGC)
-    WindowPtr	pWin;
-    GCPtr	pGC;
-{
-    pointer	    gcvalues[4];
-    int		    ts_x_origin, ts_y_origin;
-    PixUnion	    background;
-    int		    backgroundState;
-    Mask	    gcmask;
-
-    /*
-     * First take care of any ParentRelative stuff by altering the
-     * tile/stipple origin to match the coordinates of the upper-left
-     * corner of the first ancestor without a ParentRelative background.
-     * This coordinate is, of course, negative.
-     */
-
-    ts_x_origin = ts_y_origin = 0;
-    while (pWin->backgroundState == ParentRelative) {
-	ts_x_origin -= pWin->origin.x;
-	ts_y_origin -= pWin->origin.y;
-	pWin = pWin->parent;
-    }
-    backgroundState = pWin->backgroundState;
-    background = pWin->background;
-
-    switch (backgroundState)
-    {
-    case BackgroundPixel:
-	gcvalues[0] = (pointer) background.pixel;
-	gcvalues[1] = (pointer) FillSolid;
-	gcmask = GCForeground|GCFillStyle;
-	break;
-
-    case BackgroundPixmap:
-	gcvalues[0] = (pointer) FillTiled;
-	gcvalues[1] = (pointer) background.pixmap;
-	gcvalues[2] = (pointer)(long) ts_x_origin;
-	gcvalues[3] = (pointer)(long) ts_y_origin;
-	gcmask = GCFillStyle|GCTile|GCTileStipXOrigin|GCTileStipYOrigin;
-	break;
-
-    default:
-	gcvalues[0] = (pointer) GXnoop;
-	gcmask = GCFunction;
-    }
-    DoChangeGC(pGC, gcmask, (XID *)gcvalues, TRUE);
-}
-
-int
-CreateImageBuffers (pWin, nbuf, ids, action, hint)
-    WindowPtr	pWin;
-    int		nbuf;
-    XID		*ids;
-    int		action;
-    int		hint;
-{
-    MultibuffersPtr	pMultibuffers;
-    MultibufferPtr	pMultibuffer;
-    ScreenPtr		pScreen;
-    int			width, height, depth;
-    int			i;
-    GCPtr		pClearGC = NULL;
-    xRectangle		clearRect;
-
-    DestroyImageBuffers(pWin);
-    pMultibuffers = xalloc (sizeof (MultibuffersRec) + nbuf * sizeof (MultibufferRec));
-    if (!pMultibuffers)
-	return BadAlloc;
-    pMultibuffers->pWindow = pWin;
-    pMultibuffers->buffers = (MultibufferPtr) (pMultibuffers + 1);
-    pMultibuffers->refcnt = pMultibuffers->numMultibuffer = 0;
-    if (!AddResource (pWin->drawable.id, MultibuffersResType, (pointer) pMultibuffers))
-	return BadAlloc;
-    width = pWin->drawable.width;
-    height = pWin->drawable.height;
-    depth = pWin->drawable.depth;
-    pScreen = pWin->drawable.pScreen;
-
-    if (pWin->backgroundState != None)
-    {
-	pClearGC = GetScratchGC (pWin->drawable.depth, pScreen);
-	SetupBackgroundPainter (pWin, pClearGC);
-	clearRect.x = clearRect.y = 0;
-	clearRect.width = width;
-	clearRect.height = height;
-    }
-
-    for (i = 0; i < nbuf; i++)
-    {
-	pMultibuffer = &pMultibuffers->buffers[i];
-	pMultibuffer->eventMask = 0L;
-	pMultibuffer->otherEventMask = 0L;
-	pMultibuffer->otherClients = (OtherClientsPtr) NULL;
-	pMultibuffer->number = i;
-	pMultibuffer->side = MultibufferSideMono;
-	pMultibuffer->clobber = MultibufferUnclobbered;
-	pMultibuffer->pMultibuffers = pMultibuffers;
-	if (!AddResource (ids[i], MultibufferResType, (pointer) pMultibuffer))
-	    break;
-	pMultibuffer->pPixmap = (*pScreen->CreatePixmap) (pScreen, width, height, depth, 0);
-	if (!pMultibuffer->pPixmap)
-	    break;
-	if (!AddResource (ids[i], MultibufferDrawableResType, (pointer) pMultibuffer->pPixmap))
-	{
-	    FreeResource (ids[i], MultibufferResType);
-	    (*pScreen->DestroyPixmap) (pMultibuffer->pPixmap);
-	    break;
-	}
-	pMultibuffer->pPixmap->drawable.id = ids[i];
-
-	if (i > 0 && pClearGC)
-	{
-	    ValidateGC((DrawablePtr)pMultibuffer->pPixmap, pClearGC);
-	    (*pClearGC->ops->PolyFillRect)((DrawablePtr)pMultibuffer->pPixmap,
-					   pClearGC, 1, &clearRect);
-	}
-    }
-    pMultibuffers->numMultibuffer = i;
-    pMultibuffers->refcnt = i;
-    pMultibuffers->displayedMultibuffer = -1;
-    if (i > 0)
-	AliasMultibuffer (pMultibuffers, 0);
-    pMultibuffers->updateAction = action;
-    pMultibuffers->updateHint = hint;
-    pMultibuffers->windowMode = MultibufferModeMono;
-    pMultibuffers->lastUpdate.months = 0;
-    pMultibuffers->lastUpdate.milliseconds = 0;
-    pMultibuffers->width = width;
-    pMultibuffers->height = height;
-    dixSetPrivate(&pWin->devPrivates, MultibufferWindowPrivKey, pMultibuffers);
-    if (pClearGC) FreeScratchGC(pClearGC);
-    return Success;
-}
-
-
-static int
-ProcCreateImageBuffers (client)
-    ClientPtr	client;
-{
-    REQUEST(xMbufCreateImageBuffersReq);
-    xMbufCreateImageBuffersReply	rep;
-    int		n;
-    WindowPtr			pWin;
-    XID				*ids;
-    int				len, nbuf, i, err, rc;
-
-    REQUEST_AT_LEAST_SIZE (xMbufCreateImageBuffersReq);
-    len = stuff->length - bytes_to_int32(sizeof(xMbufCreateImageBuffersReq));
-    if (len == 0)
-	return BadLength;
-    rc = dixLookupWindow(&pWin, stuff->window, client, DixUnknownAccess);
-    if (rc != Success)
-	return rc;
-    if (pWin->drawable.class == InputOnly)
-	return BadMatch;
-    switch (stuff->updateAction)
-    {
-    case MultibufferUpdateActionUndefined:
-    case MultibufferUpdateActionBackground:
-    case MultibufferUpdateActionUntouched:
-    case MultibufferUpdateActionCopied:
-	break;
-    default:
-	client->errorValue = stuff->updateAction;
-	return BadValue;
-    }
-    switch (stuff->updateHint)
-    {
-    case MultibufferUpdateHintFrequent:
-    case MultibufferUpdateHintIntermittent:
-    case MultibufferUpdateHintStatic:
-	break;
-    default:
-	client->errorValue = stuff->updateHint;
-	return BadValue;
-    }
-    nbuf = len;
-    ids = (XID *) &stuff[1];
-    for (i = 0; i < nbuf; i++)
-    {
-	LEGAL_NEW_RESOURCE(ids[i], client);
-    }
-    err = CreateImageBuffers (pWin, nbuf, ids,
-			      stuff->updateAction, stuff->updateHint);
-    if (err != Success)
-	return err;
-    rep.type = X_Reply;
-    rep.length = 0;
-    rep.sequenceNumber = client->sequence;
-    rep.numberBuffer = ((MultibuffersPtr) (dixLookupPrivate(&pWin->devPrivates, MultibufferWindowPrivKey)))->numMultibuffer;
-    if (client->swapped)
-    {
-    	swaps(&rep.sequenceNumber, n);
-    	swapl(&rep.length, n);
-	swaps(&rep.numberBuffer, n);
-    }
-    WriteToClient(client, sizeof (xMbufCreateImageBuffersReply), (char*)&rep);
-    return (client->noClientException);
-}
-
-static int
-ProcDisplayImageBuffers (client)
-    ClientPtr	client;
-{
-    REQUEST(xMbufDisplayImageBuffersReq);
-    MultibufferPtr	    *pMultibuffer;
-    MultibuffersPtr	    *ppMultibuffers;
-    int		    nbuf;
-    XID		    *ids;
-    int		    i, j;
-    CARD32	    minDelay;
-    TimeStamp	    activateTime, bufferTime;
-    int		    rc;
-    
-
-    REQUEST_AT_LEAST_SIZE (xMbufDisplayImageBuffersReq);
-    nbuf = stuff->length - bytes_to_int32(sizeof (xMbufDisplayImageBuffersReq));
-    if (!nbuf)
-	return Success;
-    minDelay = stuff->minDelay;
-    ids = (XID *) &stuff[1];
-    ppMultibuffers = xalloc(nbuf * sizeof (MultibuffersPtr));
-    pMultibuffer = xalloc(nbuf * sizeof (MultibufferPtr));
-    if (!ppMultibuffers || !pMultibuffer)
-    {
-	if (ppMultibuffers) xfree(ppMultibuffers);
-	if (pMultibuffer)   xfree(pMultibuffer);
-	client->errorValue = 0;
-	return BadAlloc;
-    }
-    activateTime.months = 0;
-    activateTime.milliseconds = 0;
-    for (i = 0; i < nbuf; i++)
-    {
-	rc = dixLookupResourceByType(&pMultibuffer[i], ids[i],
-		MultibufferResType, client, DixUseAccess);
-	if (rc != Success)
-	{
-	    xfree(ppMultibuffers);
-	    xfree(pMultibuffer);
-	    client->errorValue = ids[i];
-	    return MultibufferErrorBase + MultibufferBadBuffer;
-	}
-	ppMultibuffers[i] = pMultibuffer[i]->pMultibuffers;
-	for (j = 0; j < i; j++)
-	{
-	    if (ppMultibuffers[i] == ppMultibuffers[j])
-	    {
-	    	xfree(ppMultibuffers);
-	    	xfree(pMultibuffer);
-		client->errorValue = ids[i];
-	    	return BadMatch;
-	    }
-	}
-	bufferTime = ppMultibuffers[i]->lastUpdate;
-	BumpTimeStamp (&bufferTime, minDelay);
-	if (CompareTimeStamps (bufferTime, activateTime) == LATER)
-	    activateTime = bufferTime;
-    }
-    UpdateCurrentTime ();
-    if (CompareTimeStamps (activateTime, currentTime) == LATER &&
-	QueueDisplayRequest (client, activateTime))
-    {
-	;
-    }
-    else
-	PerformDisplayRequest (ppMultibuffers, pMultibuffer, nbuf);
-
-    xfree(ppMultibuffers);
-    xfree(pMultibuffer);
-    return Success;
-}
-
-
-static int
-ProcDestroyImageBuffers (client)
-    ClientPtr	client;
-{
-    REQUEST (xMbufDestroyImageBuffersReq);
-    WindowPtr	pWin;
-    int rc;
-
-    REQUEST_SIZE_MATCH (xMbufDestroyImageBuffersReq);
-    rc = dixLookupWindow(&pWin, stuff->window, client, DixUnknownAccess);
-    if (rc != Success)
-	return rc;
-    DestroyImageBuffers (pWin);
-    return Success;
-}
-
-static int
-ProcSetMBufferAttributes (client)
-    ClientPtr	client;
-{
-    REQUEST (xMbufSetMBufferAttributesReq);
-    WindowPtr	pWin;
-    MultibuffersPtr	pMultibuffers;
-    int		len, rc;
-    Mask	vmask;
-    Mask	index2;
-    CARD32	updateHint;
-    XID		*vlist;
-
-    REQUEST_AT_LEAST_SIZE (xMbufSetMBufferAttributesReq);
-    rc = dixLookupWindow(&pWin, stuff->window, client, DixUnknownAccess);
-    if (rc != Success)
-	return rc;
-    rc = dixLookupResourceByType(&pMultibuffers, pWin->drawable.id,
-	    MultibufferResType, client, DixSetAttrAccess);
-    if (rc != Success)
-	return BadMatch;
-    len = stuff->length - bytes_to_int32(sizeof (xMbufSetMBufferAttributesReq));
-    vmask = stuff->valueMask;
-    if (len != Ones (vmask))
-	return BadLength;
-    vlist = (XID *) &stuff[1];
-    while (vmask)
-    {
-	index2 = (Mask) lowbit (vmask);
-	vmask &= ~index2;
-	switch (index2)
-	{
-	case MultibufferWindowUpdateHint:
-	    updateHint = (CARD32) *vlist;
-	    switch (updateHint)
-	    {
-	    case MultibufferUpdateHintFrequent:
-	    case MultibufferUpdateHintIntermittent:
-	    case MultibufferUpdateHintStatic:
-		pMultibuffers->updateHint = updateHint;
-		break;
-	    default:
-		client->errorValue = updateHint;
-		return BadValue;
-	    }
-	    vlist++;
-	    break;
-	default:
-	    client->errorValue = stuff->valueMask;
-	    return BadValue;
-	}
-    }
-    return Success;
-}
-
-static int
-ProcGetMBufferAttributes (client)
-    ClientPtr	client;
-{
-    REQUEST (xMbufGetMBufferAttributesReq);
-    WindowPtr	pWin;
-    MultibuffersPtr	pMultibuffers;
-    XID		*ids;
-    xMbufGetMBufferAttributesReply  rep;
-    int		i, n, rc;
-
-    REQUEST_SIZE_MATCH (xMbufGetMBufferAttributesReq);
-    rc = dixLookupWindow(&pWin, stuff->window, client, DixUnknownAccess);
-    if (rc != Success)
-	return rc;
-    rc = dixLookupResourceByType(&pMultibuffers, pWin->drawable.id,
-	    MultibufferResType, client, DixGetAttrAccess);
-    if (rc != Success)
-	return BadAccess;
-    ids = xalloc (pMultibuffers->numMultibuffer * sizeof (XID));
-    if (!ids)
-	return BadAlloc;
-    for (i = 0; i < pMultibuffers->numMultibuffer; i++)
-	ids[i] = pMultibuffers->buffers[i].pPixmap->drawable.id;
-    rep.type = X_Reply;
-    rep.sequenceNumber = client->sequence;
-    rep.length = pMultibuffers->numMultibuffer;
-    rep.displayedBuffer = pMultibuffers->displayedMultibuffer;
-    rep.updateAction = pMultibuffers->updateAction;
-    rep.updateHint = pMultibuffers->updateHint;
-    rep.windowMode = pMultibuffers->windowMode;
-    if (client->swapped)
-    {
-    	swaps(&rep.sequenceNumber, n);
-    	swapl(&rep.length, n);
-	swaps(&rep.displayedBuffer, n);
-	SwapLongs (ids, pMultibuffers->numMultibuffer);
-    }
-    WriteToClient (client, sizeof(xMbufGetMBufferAttributesReply),
-		   (char *)&rep);
-    WriteToClient (client, (int)(pMultibuffers->numMultibuffer * sizeof (XID)),
-		   (char *)ids);
-    xfree((pointer) ids);
-    return client->noClientException;
-}
-
-static int
-ProcSetBufferAttributes (client)
-    ClientPtr	client;
-{
-    REQUEST(xMbufSetBufferAttributesReq);
-    MultibufferPtr	pMultibuffer;
-    int		len;
-    Mask	vmask, index2;
-    XID		*vlist;
-    Mask	eventMask;
-    int		result;
-    int		rc;
-
-    REQUEST_AT_LEAST_SIZE (xMbufSetBufferAttributesReq);
-
-    rc = dixLookupResourceByType(&pMultibuffer, stuff->buffer,
-	    MultibufferResType, client, DixSetAttrAccess);
-    if (rc != Success)
-	return MultibufferErrorBase + MultibufferBadBuffer;
-    len = stuff->length - bytes_to_int32(sizeof (xMbufSetBufferAttributesReq));
-    vmask = stuff->valueMask;
-    if (len != Ones (vmask))
-	return BadLength;
-    vlist = (XID *) &stuff[1];
-    while (vmask)
-    {
-	index2 = (Mask) lowbit (vmask);
-	vmask &= ~index2;
-	switch (index2)
-	{
-	case MultibufferBufferEventMask:
-	    eventMask = (Mask) *vlist;
-	    vlist++;
-	    result = EventSelectForMultibuffer (pMultibuffer, client, eventMask);
-	    if (result != Success)
-		return result;
-	    break;
-	default:
-	    client->errorValue = stuff->valueMask;
-	    return BadValue;
-	}
-    }
-    return Success;
-}
-
-int
-ProcGetBufferAttributes (client)
-    ClientPtr	client;
-{
-    REQUEST(xMbufGetBufferAttributesReq);
-    MultibufferPtr	pMultibuffer;
-    xMbufGetBufferAttributesReply	rep;
-    OtherClientsPtr		other;
-    int				n;
-    int				rc;
-
-    REQUEST_SIZE_MATCH (xMbufGetBufferAttributesReq);
-    rc = dixLookupResourceByType(&pMultibuffer, stuff->buffer,
-	    MultibufferResType, client, DixGetAttrAccess);
-    if (rc != Success)
-	return MultibufferErrorBase + MultibufferBadBuffer;
-    rep.type = X_Reply;
-    rep.sequenceNumber = client->sequence;
-    rep.length = 0;
-    rep.window = pMultibuffer->pMultibuffers->pWindow->drawable.id;
-    if (bClient (pMultibuffer) == client)
-	rep.eventMask = pMultibuffer->eventMask;
-    else
-    {
-	rep.eventMask = (Mask) 0L;
-	for (other = pMultibuffer->otherClients; other; other = other->next)
-	    if (SameClient (other, client))
-	    {
-		rep.eventMask = other->mask;
-		break;
-	    }
-    }
-    rep.bufferIndex = pMultibuffer->number;
-    rep.side = pMultibuffer->side;
-    if (client->swapped)
-    {
-    	swaps(&rep.sequenceNumber, n);
-    	swapl(&rep.length, n);
-	swapl(&rep.window, n);
-	swapl(&rep.eventMask, n);
-	swaps(&rep.bufferIndex, n);
-    }
-    WriteToClient(client, sizeof (xMbufGetBufferAttributesReply), (char *)&rep);
-    return (client->noClientException);
-}
-
-static int
-ProcGetBufferInfo (client)
-    ClientPtr	client;
-{
-    REQUEST (xMbufGetBufferInfoReq);
-    DrawablePtr		    pDrawable;
-    xMbufGetBufferInfoReply rep;
-    ScreenPtr		    pScreen;
-    int			    i, j, k, n, rc;
-    xMbufBufferInfo	    *pInfo;
-    int			    nInfo;
-    DepthPtr		    pDepth;
-
-    rc = dixLookupDrawable(&pDrawable, stuff->drawable, client, 0,
-			   DixUnknownAccess);
-    if (rc != Success)
-	return rc;
-    pScreen = pDrawable->pScreen;
-    nInfo = 0;
-    for (i = 0; i < pScreen->numDepths; i++)
-    {
-	pDepth = &pScreen->allowedDepths[i];
-	nInfo += pDepth->numVids;
-    }
-    pInfo = xalloc (nInfo * sizeof (xMbufBufferInfo));
-    if (!pInfo)
-	return BadAlloc;
-
-    rep.type = X_Reply;
-    rep.sequenceNumber = client->sequence;
-    rep.length = nInfo * bytes_to_int32(sizeof (xMbufBufferInfo));
-    rep.normalInfo = nInfo;
-    rep.stereoInfo = 0;
-    if (client->swapped)
-    {
-	swaps(&rep.sequenceNumber, n);
-	swapl(&rep.length, n);
-	swaps(&rep.normalInfo, n);
-	swaps(&rep.stereoInfo, n);
-    }
-
-    k = 0;
-    for (i = 0; i < pScreen->numDepths; i++)
-    {
-	pDepth = &pScreen->allowedDepths[i];
-	for (j = 0; j < pDepth->numVids; j++)
-	{
-	    pInfo[k].visualID = pDepth->vids[j];
-	    pInfo[k].maxBuffers = 0;
-	    pInfo[k].depth = pDepth->depth;
-	    if (client->swapped)
-	    {
-		swapl (&pInfo[k].visualID, n);
-		swaps (&pInfo[k].maxBuffers, n);
-	    }
-	    k++;
-	}
-    }
-    WriteToClient (client, sizeof (xMbufGetBufferInfoReply), (pointer) &rep);
-    WriteToClient (client, (int) nInfo * sizeof (xMbufBufferInfo), (pointer) pInfo);
-    xfree ((pointer) pInfo);
-    return client->noClientException;
-}
-
-static int
-ProcClearImageBufferArea (client)
-    ClientPtr	client;
-{
-    REQUEST (xMbufClearImageBufferAreaReq);
-    MultibufferPtr	pMultibuffer;
-    WindowPtr pWin;
-    xRectangle clearRect;
-    int width, height;
-    DrawablePtr pDrawable;
-    ScreenPtr pScreen;
-    int rc;
-
-    REQUEST_SIZE_MATCH (xMbufClearImageBufferAreaReq);
-    rc = dixLookupResourceByType(&pMultibuffer, stuff->buffer,
-	    MultibufferResType, client, DixWriteAccess);
-    if (rc != Success)
-	return MultibufferErrorBase + MultibufferBadBuffer;
-    if ((stuff->exposures != xTrue) && (stuff->exposures != xFalse))
-    {
-	client->errorValue = stuff->exposures;
-        return(BadValue);
-    }
-    pWin = pMultibuffer->pMultibuffers->pWindow;
-    width  = pWin->drawable.width;
-    height = pWin->drawable.height;
-    pScreen = pWin->drawable.pScreen;
-
-    clearRect.x = stuff->x;
-    clearRect.y = stuff->y;
-    clearRect.width  = stuff->width  ? stuff->width  : width;
-    clearRect.height = stuff->height ? stuff->height : height;
-
-    if (pWin->backgroundState != None)
-    {
-	GCPtr pClearGC;
-	pClearGC = GetScratchGC (pWin->drawable.depth, pScreen);
-	SetupBackgroundPainter (pWin, pClearGC);
-
-	if (pMultibuffer->number == pMultibuffer->pMultibuffers->displayedMultibuffer)
-	    pDrawable = (DrawablePtr)pWin;
-	else
-	    pDrawable = (DrawablePtr)pMultibuffer->pPixmap;
-
-	ValidateGC(pDrawable, pClearGC);
-	(*pClearGC->ops->PolyFillRect) (pDrawable, pClearGC, 1, &clearRect);
-	FreeScratchGC(pClearGC);
-    }
-
-    if (stuff->exposures)
-    {
-	RegionRec region;
-	BoxRec box;
-	box.x1 = clearRect.x;
-	box.y1 = clearRect.y;
-	box.x2 = clearRect.x + clearRect.width;
-	box.y2 = clearRect.y + clearRect.height;
-	REGION_INIT(pScreen, &region, &box, 1);
-	MultibufferExpose(pMultibuffer, &region);
-	REGION_UNINIT(pScreen, &region);
-    }
-    return Success;
-}
-
-static int
-ProcMultibufferDispatch (client)
-    ClientPtr	client;
-{
-    REQUEST(xReq);
-    switch (stuff->data) {
-    case X_MbufGetBufferVersion:
-	return ProcGetBufferVersion (client);
-    case X_MbufCreateImageBuffers:
-	return ProcCreateImageBuffers (client);
-    case X_MbufDisplayImageBuffers:
-	return ProcDisplayImageBuffers (client);
-    case X_MbufDestroyImageBuffers:
-	return ProcDestroyImageBuffers (client);
-    case X_MbufSetMBufferAttributes:
-	return ProcSetMBufferAttributes (client);
-    case X_MbufGetMBufferAttributes:
-	return ProcGetMBufferAttributes (client);
-    case X_MbufSetBufferAttributes:
-	return ProcSetBufferAttributes (client);
-    case X_MbufGetBufferAttributes:
-	return ProcGetBufferAttributes (client);
-    case X_MbufGetBufferInfo:
-	return ProcGetBufferInfo (client);
-    case X_MbufClearImageBufferArea:
-	return ProcClearImageBufferArea (client);
-    default:
-	return BadRequest;
-    }
-}
-
-static int
-SProcGetBufferVersion (client)
-    ClientPtr	client;
-{
-    int    n;
-    REQUEST (xMbufGetBufferVersionReq);
-
-    swaps (&stuff->length, n);
-    return ProcGetBufferVersion (client);
-}
-
-static int
-SProcCreateImageBuffers (client)
-    ClientPtr	client;
-{
-    int    n;
-    REQUEST (xMbufCreateImageBuffersReq);
-
-    swaps (&stuff->length, n);
-    REQUEST_AT_LEAST_SIZE (xMbufCreateImageBuffersReq);
-    swapl (&stuff->window, n);
-    SwapRestL(stuff);
-    return ProcCreateImageBuffers (client);
-}
-
-static int
-SProcDisplayImageBuffers (client)
-    ClientPtr	client;
-{
-    int    n;
-    REQUEST (xMbufDisplayImageBuffersReq);
-    
-    swaps (&stuff->length, n);
-    REQUEST_AT_LEAST_SIZE (xMbufDisplayImageBuffersReq);
-    swaps (&stuff->minDelay, n);
-    swaps (&stuff->maxDelay, n);
-    SwapRestL(stuff);
-    return ProcDisplayImageBuffers (client);
-}
-
-static int
-SProcDestroyImageBuffers (client)
-    ClientPtr	client;
-{
-    int    n;
-    REQUEST (xMbufDestroyImageBuffersReq);
-    
-    swaps (&stuff->length, n);
-    REQUEST_SIZE_MATCH (xMbufDestroyImageBuffersReq);
-    swapl (&stuff->window, n);
-    return ProcDestroyImageBuffers (client);
-}
-
-static int
-SProcSetMBufferAttributes (client)
-    ClientPtr	client;
-{
-    int    n;
-    REQUEST (xMbufSetMBufferAttributesReq);
-
-    swaps (&stuff->length, n);
-    REQUEST_AT_LEAST_SIZE(xMbufSetMBufferAttributesReq);
-    swapl (&stuff->window, n);
-    swapl (&stuff->valueMask, n);
-    SwapRestL(stuff);
-    return ProcSetMBufferAttributes (client);
-}
-
-static int
-SProcGetMBufferAttributes (client)
-    ClientPtr	client;
-{
-    int    n;
-    REQUEST (xMbufGetMBufferAttributesReq);
-
-    swaps (&stuff->length, n);
-    REQUEST_AT_LEAST_SIZE(xMbufGetMBufferAttributesReq);
-    swapl (&stuff->window, n);
-    return ProcGetMBufferAttributes (client);
-}
-
-static int
-SProcSetBufferAttributes (client)
-    ClientPtr	client;
-{
-    int    n;
-    REQUEST (xMbufSetBufferAttributesReq);
-
-    swaps (&stuff->length, n);
-    REQUEST_AT_LEAST_SIZE(xMbufSetBufferAttributesReq);
-    swapl (&stuff->buffer, n);
-    swapl (&stuff->valueMask, n);
-    SwapRestL(stuff);
-    return ProcSetBufferAttributes (client);
-}
-
-static int
-SProcGetBufferAttributes (client)
-    ClientPtr	client;
-{
-    int    n;
-    REQUEST (xMbufGetBufferAttributesReq);
-
-    swaps (&stuff->length, n);
-    REQUEST_AT_LEAST_SIZE(xMbufGetBufferAttributesReq);
-    swapl (&stuff->buffer, n);
-    return ProcGetBufferAttributes (client);
-}
-
-static int
-SProcGetBufferInfo (client)
-    ClientPtr	client;
-{
-    int    n;
-    REQUEST (xMbufGetBufferInfoReq);
-
-    swaps (&stuff->length, n);
-    REQUEST_SIZE_MATCH (xMbufGetBufferInfoReq);
-    swapl (&stuff->drawable, n);
-    return ProcGetBufferInfo (client);
-}
-
-static int
-SProcClearImageBufferArea(client)
-    ClientPtr client;
-{
-    char n;
-    REQUEST(xMbufClearImageBufferAreaReq);
-
-    swaps(&stuff->length, n);
-    REQUEST_SIZE_MATCH (xMbufClearImageBufferAreaReq);
-    swapl(&stuff->buffer, n);
-    swaps(&stuff->x, n);
-    swaps(&stuff->y, n);
-    swaps(&stuff->width, n);
-    swaps(&stuff->height, n);
-    return ProcClearImageBufferArea(client);
-}
-
-static int
-SProcMultibufferDispatch (client)
-    ClientPtr	client;
-{
-    REQUEST(xReq);
-    switch (stuff->data) {
-    case X_MbufGetBufferVersion:
-	return SProcGetBufferVersion (client);
-    case X_MbufCreateImageBuffers:
-	return SProcCreateImageBuffers (client);
-    case X_MbufDisplayImageBuffers:
-	return SProcDisplayImageBuffers (client);
-    case X_MbufDestroyImageBuffers:
-	return SProcDestroyImageBuffers (client);
-    case X_MbufSetMBufferAttributes:
-	return SProcSetMBufferAttributes (client);
-    case X_MbufGetMBufferAttributes:
-	return SProcGetMBufferAttributes (client);
-    case X_MbufSetBufferAttributes:
-	return SProcSetBufferAttributes (client);
-    case X_MbufGetBufferAttributes:
-	return SProcGetBufferAttributes (client);
-    case X_MbufGetBufferInfo:
-	return SProcGetBufferInfo (client);
-    case X_MbufClearImageBufferArea:
-	return SProcClearImageBufferArea (client);
-    default:
-	return BadRequest;
-    }
-}
-
-static void
-SUpdateNotifyEvent (from, to)
-    xMbufUpdateNotifyEvent	*from, *to;
-{
-    to->type = from->type;
-    cpswaps (from->sequenceNumber, to->sequenceNumber);
-    cpswapl (from->buffer, to->buffer);
-    cpswapl (from->timeStamp, to->timeStamp);
-}
-
-static void
-SClobberNotifyEvent (from, to)
-    xMbufClobberNotifyEvent	*from, *to;
-{
-    to->type = from->type;
-    cpswaps (from->sequenceNumber, to->sequenceNumber);
-    cpswapl (from->buffer, to->buffer);
-    to->state = from->state;
-}
-
-RegionPtr CreateUnclippedWinSize(WindowPtr pWin);
-
-RegionPtr
-CreateUnclippedWinSize (WindowPtr pWin)
-{
-    RegionPtr	pRgn;
-    BoxRec	box;
-
-    box.x1 = pWin->drawable.x;
-    box.y1 = pWin->drawable.y;
-    box.x2 = pWin->drawable.x + (int) pWin->drawable.width;
-    box.y2 = pWin->drawable.y + (int) pWin->drawable.height;
-    pRgn = REGION_CREATE(pWin->drawable.pScreen, &box, 1);
-    if (wBoundingShape (pWin) || wClipShape (pWin)) {
-	ScreenPtr pScreen;
-        pScreen = pWin->drawable.pScreen;
-
-	REGION_TRANSLATE(pScreen, pRgn, - pWin->drawable.x,
-			 - pWin->drawable.y);
-	if (wBoundingShape (pWin))
-	    REGION_INTERSECT(pScreen, pRgn, pRgn, wBoundingShape (pWin));
-	if (wClipShape (pWin))
-	    REGION_INTERSECT(pScreen, pRgn, pRgn, wClipShape (pWin));
-	REGION_TRANSLATE(pScreen, pRgn, pWin->drawable.x, pWin->drawable.y);
-    }
-    return pRgn;
-}
-
-static void
-PerformDisplayRequest (ppMultibuffers, pMultibuffer, nbuf)
-    MultibufferPtr	    *pMultibuffer;
-    MultibuffersPtr	    *ppMultibuffers;
-    int		    nbuf;
-{
-    GCPtr	    pGC;
-    PixmapPtr	    pPrevPixmap, pNewPixmap;
-    xRectangle	    clearRect;
-    WindowPtr	    pWin;
-    RegionPtr	    pExposed;
-    int		    i;
-    MultibufferPtr  pPrevMultibuffer;
-    XID		    graphicsExpose;
-
-    UpdateCurrentTime ();
-    for (i = 0; i < nbuf; i++)
-    {
-	pWin = ppMultibuffers[i]->pWindow;
-	pGC = GetScratchGC (pWin->drawable.depth, pWin->drawable.pScreen);
-	pPrevMultibuffer =
-	   &ppMultibuffers[i]->buffers[ppMultibuffers[i]->displayedMultibuffer];
-	pPrevPixmap = pPrevMultibuffer->pPixmap;
-	pNewPixmap = pMultibuffer[i]->pPixmap;
-	switch (ppMultibuffers[i]->updateAction)
-	{
-	case MultibufferUpdateActionUndefined:
-	    break;
-	case MultibufferUpdateActionBackground:
-	    SetupBackgroundPainter (pWin, pGC);
-	    ValidateGC ((DrawablePtr)pPrevPixmap, pGC);
-	    clearRect.x = 0;
-	    clearRect.y = 0;
-	    clearRect.width = pPrevPixmap->drawable.width;
-	    clearRect.height = pPrevPixmap->drawable.height;
-	    (*pGC->ops->PolyFillRect) ((DrawablePtr)pPrevPixmap, pGC,
-				       1, &clearRect);
-	    break;
-	case MultibufferUpdateActionUntouched:
-	    /* copy the window to the pixmap that represents the
-	     * currently displayed buffer
-	     */
-	    if (pPrevMultibuffer->eventMask & ExposureMask)
-	    {
-	    	graphicsExpose = TRUE;
-	    	DoChangeGC (pGC, GCGraphicsExposures, &graphicsExpose, FALSE);
-	    }
-	    ValidateGC ((DrawablePtr)pPrevPixmap, pGC);
-	    pExposed = (*pGC->ops->CopyArea)
-			    ((DrawablePtr) pWin,
-			     (DrawablePtr) pPrevPixmap,
-			     pGC,
-			     0, 0,
-			     pWin->drawable.width, pWin->drawable.height,
-			     0, 0);
-
-	    /* if we couldn't copy the whole window to the buffer,
-	     * send expose events (if any client wants them)
-	     */
-	    if (pPrevMultibuffer->eventMask & ExposureMask)
-	    { /* some client wants expose events */
-	    	if (pExposed)
-	    	{
-		    RegionPtr	pWinSize;
-
-		    pWinSize = CreateUnclippedWinSize (pWin);
-		    /* pExposed is window-relative, but at this point
-		     * pWinSize is screen-relative.  Make pWinSize be
-		     * window-relative so that region ops involving
-		     * pExposed and pWinSize behave sensibly.
-		     */
-		    REGION_TRANSLATE(pWin->drawable.pScreen, pWinSize,
-				     -pWin->drawable.x, -pWin->drawable.y);
-		    REGION_INTERSECT(pWin->drawable.pScreen, pExposed,
-				     pExposed, pWinSize);
-		    REGION_DESTROY(pWin->drawable.pScreen, pWinSize);
-	    	    MultibufferExpose (pPrevMultibuffer, pExposed);
-	    	    REGION_DESTROY(pWin->drawable.pScreen, pExposed);
-	    	}
-	    	graphicsExpose = FALSE;
-	    	DoChangeGC (pGC, GCGraphicsExposures, &graphicsExpose, FALSE);
-	    }
-	    break; /* end case MultibufferUpdateActionUntouched */
-
-	case MultibufferUpdateActionCopied:
-	    ValidateGC ((DrawablePtr)pPrevPixmap, pGC);
-	    (*pGC->ops->CopyArea) ((DrawablePtr)pNewPixmap,
-				   (DrawablePtr)pPrevPixmap, pGC,
-				   0, 0,
-				   pWin->drawable.width, pWin->drawable.height,
-				   0, 0);
-	    break;
-	} /* end switch on update action */
-
-	/* display the new buffer */
-	ValidateGC ((DrawablePtr)pWin, pGC);
-	(*pGC->ops->CopyArea) ((DrawablePtr)pNewPixmap, (DrawablePtr)pWin, pGC,
-			       0, 0,
-			       pWin->drawable.width, pWin->drawable.height,
-			       0, 0);
-	ppMultibuffers[i]->lastUpdate = currentTime;
-	MultibufferUpdate (pMultibuffer[i],
-			   ppMultibuffers[i]->lastUpdate.milliseconds);
-	AliasMultibuffer (ppMultibuffers[i],
-			  pMultibuffer[i] - ppMultibuffers[i]->buffers);
-	FreeScratchGC (pGC);
-    }
-}
-
-DrawablePtr
-GetBufferPointer (pWin, i)
-    WindowPtr	pWin;
-    int		i;
-{
-    MultibuffersPtr pMultibuffers;
-
-    if (!(pMultibuffers = (MultibuffersPtr) dixLookupPrivate(&pWin->devPrivates, MultibufferWindowPrivKey)))
-	return NULL;
-    return (DrawablePtr) pMultibuffers->buffers[i].pPixmap;
-}
-
-static Bool
-QueueDisplayRequest (client, activateTime)
-    ClientPtr	    client;
-    TimeStamp	    activateTime;
-{
-    /* see xtest.c:ProcXTestFakeInput for code similar to this */
-
-    if (!ClientSleepUntil(client, &activateTime, NULL, NULL))
-    {
-	return FALSE;
-    }
-    /* swap the request back so we can simply re-execute it */
-    if (client->swapped)
-    {
-    	int    n;
-    	REQUEST (xMbufDisplayImageBuffersReq);
-    	
-    	SwapRestL(stuff);
-    	swaps (&stuff->length, n);
-    	swaps (&stuff->minDelay, n);
-    	swaps (&stuff->maxDelay, n);
-    }
-    ResetCurrentRequest (client);
-    client->sequence--;
-    return TRUE;
-}
-
-
-/*
- * Deliver events to a buffer
- */
-
-static int
-DeliverEventsToMultibuffer (pMultibuffer, pEvents, count, filter)
-    MultibufferPtr	pMultibuffer;
-    xEvent	*pEvents;
-    int		count;
-    Mask	filter;
-{
-    int deliveries = 0, nondeliveries = 0;
-    int attempt;
-    OtherClients *other;
-
-    /* if nobody wants the event, we're done */
-    if (!((pMultibuffer->otherEventMask|pMultibuffer->eventMask) & filter))
-	return 0;
-
-    /* maybe send event to owner */
-    if ((attempt = TryClientEvents(
-	bClient(pMultibuffer), NULL, pEvents, count, pMultibuffer->eventMask, filter, (GrabPtr) 0)) != 0)
-    {
-	if (attempt > 0)
-	    deliveries++;
-	else
-	    nondeliveries--;
-    }
-
-    /* maybe send event to other clients */
-    for (other = pMultibuffer->otherClients; other; other=other->next)
-    {
-	if ((attempt = TryClientEvents(
-	      rClient(other), NULL, pEvents, count, other->mask, filter, (GrabPtr) 0)) != 0)
-	{
-	    if (attempt > 0)
-		deliveries++;
-	    else
-		nondeliveries--;
-	}
-    }
-    if (deliveries)
-	return deliveries;
-    return nondeliveries;
-}
-
-/*
- * Send Expose events to interested clients
- */
-
-void
-MultibufferExpose (pMultibuffer, pRegion)
-    MultibufferPtr	pMultibuffer;
-    RegionPtr	pRegion;
-{
-    if (pRegion && !REGION_NIL(pRegion))
-    {
-	xEvent *pEvent;
-	PixmapPtr   pPixmap;
-	xEvent *pe;
-	BoxPtr pBox;
-	int i;
-	int numRects;
-
-	pPixmap = pMultibuffer->pPixmap;
-	REGION_TRANSLATE(pPixmap->drawable.pScreen, pRegion,
-		    -pPixmap->drawable.x, -pPixmap->drawable.y);
-	/* XXX MultibufferExpose "knows" the region representation */
-	numRects = REGION_NUM_RECTS(pRegion);
-	pBox = REGION_RECTS(pRegion);
-
-	pEvent = xalloc(numRects * sizeof(xEvent));
-	if (pEvent) {
-	    pe = pEvent;
-
-	    for (i=1; i<=numRects; i++, pe++, pBox++)
-	    {
-		pe->u.u.type = Expose;
-		pe->u.expose.window = pPixmap->drawable.id;
-		pe->u.expose.x = pBox->x1;
-		pe->u.expose.y = pBox->y1;
-		pe->u.expose.width = pBox->x2 - pBox->x1;
-		pe->u.expose.height = pBox->y2 - pBox->y1;
-		pe->u.expose.count = (numRects - i);
-	    }
-	    (void) DeliverEventsToMultibuffer (pMultibuffer, pEvent, numRects,
-					       ExposureMask);
-	    xfree(pEvent);
-	}
-    }
-}
-
-/* send UpdateNotify event */
-void
-MultibufferUpdate (pMultibuffer, time2)
-    MultibufferPtr	pMultibuffer;
-    CARD32	time2;
-{
-    xMbufUpdateNotifyEvent	event;
-
-    event.type = MultibufferEventBase + MultibufferUpdateNotify;
-    event.buffer = pMultibuffer->pPixmap->drawable.id;
-    event.timeStamp = time2;
-    (void) DeliverEventsToMultibuffer (pMultibuffer, (xEvent *)&event,
-				1, (Mask)MultibufferUpdateNotifyMask);
-}
-
-/*
- * The sample implementation will never generate MultibufferClobberNotify
- * events
- */
-
-void
-MultibufferClobber (pMultibuffer)
-    MultibufferPtr	pMultibuffer;
-{
-    xMbufClobberNotifyEvent	event;
-
-    event.type = MultibufferEventBase + MultibufferClobberNotify;
-    event.buffer = pMultibuffer->pPixmap->drawable.id;
-    event.state = pMultibuffer->clobber;
-    (void) DeliverEventsToMultibuffer (pMultibuffer, (xEvent *)&event,
-				1, (Mask)MultibufferClobberNotifyMask);
-}
-
-/*
- * make the resource id for buffer i refer to the window
- * drawable instead of the pixmap;
- */
-
-static void
-AliasMultibuffer (pMultibuffers, i)
-    MultibuffersPtr	pMultibuffers;
-    int		i;
-{
-    MultibufferPtr	pMultibuffer;
-
-    if (i == pMultibuffers->displayedMultibuffer)
-	return;
-    /*
-     * remove the old association
-     */
-    if (pMultibuffers->displayedMultibuffer >= 0)
-    {
-	pMultibuffer = &pMultibuffers->buffers[pMultibuffers->displayedMultibuffer];
-	ChangeResourceValue (pMultibuffer->pPixmap->drawable.id,
-			     MultibufferDrawableResType,
- 			     (pointer) pMultibuffer->pPixmap);
-    }
-    /*
-     * make the new association
-     */
-    pMultibuffer = &pMultibuffers->buffers[i];
-    ChangeResourceValue (pMultibuffer->pPixmap->drawable.id,
-			 MultibufferDrawableResType,
-			 (pointer) pMultibuffers->pWindow);
-    pMultibuffers->displayedMultibuffer = i;
-}
-
-/*
- * free everything associated with multibuffering for this
- * window
- */
-
-void
-DestroyImageBuffers (pWin)
-    WindowPtr	pWin;
-{
-    FreeResourceByType (pWin->drawable.id, MultibuffersResType, FALSE);
-    /* Zero out the window's pointer to the buffers so they won't be reused */
-    dixSetPrivate(&pWin->devPrivates, MultibufferWindowPrivKey, NULL);
-}
-
-/*
- * resize the buffers when the window is resized
- */ 
-
-static Bool
-MultibufferPositionWindow (pWin, x, y)
-    WindowPtr	pWin;
-    int		x, y;
-{
-    ScreenPtr	    pScreen;
-    MultibufferScreenPtr pMultibufferScreen;
-    MultibuffersPtr	    pMultibuffers;
-    MultibufferPtr	    pMultibuffer;
-    int		    width, height;
-    int		    i;
-    int		    dx, dy, dw, dh;
-    int		    sourcex, sourcey;
-    int		    destx, desty;
-    PixmapPtr	    pPixmap;
-    GCPtr	    pGC;
-    int		    savewidth, saveheight;
-    xRectangle	    clearRect;
-    Bool	    clear;
-
-    pScreen = pWin->drawable.pScreen;
-    pMultibufferScreen = (MultibufferScreenPtr) dixLookupPrivate(&pScreen->devPrivates, MultibufferScreenPrivKey);
-    (*pMultibufferScreen->PositionWindow) (pWin, x, y);
-
-    /* if this window is not multibuffered, we're done */
-    if (!(pMultibuffers = (MultibuffersPtr) dixLookupPrivate(&pWin->devPrivates, MultibufferWindowPrivKey)))
-	return TRUE;
-
-    /* if new size is same as old, we're done */
-    if (pMultibuffers->width == pWin->drawable.width &&
-        pMultibuffers->height == pWin->drawable.height)
-	return TRUE;
-
-    width = pWin->drawable.width;
-    height = pWin->drawable.height;
-    dx = pWin->drawable.x - pMultibuffers->x;
-    dy = pWin->drawable.x - pMultibuffers->y;
-    dw = width - pMultibuffers->width;
-    dh = height - pMultibuffers->height;
-    GravityTranslate (0, 0, -dx, -dy, dw, dh,
-		      pWin->bitGravity, &destx, &desty);
-
-    /* if the window grew, remember to paint the window background,
-     * and maybe send expose events, for the new areas of the buffers
-     */
-    clear = pMultibuffers->width < width || pMultibuffers->height < height ||
-		pWin->bitGravity == ForgetGravity;
-
-    sourcex = 0;
-    sourcey = 0;
-    savewidth = pMultibuffers->width;
-    saveheight = pMultibuffers->height;
-    /* clip rectangle to source and destination */
-    if (destx < 0)
-    {
-	savewidth += destx;
-	sourcex -= destx;
-	destx = 0;
-    }
-    if (destx + savewidth > width)
-	savewidth = width - destx;
-    if (desty < 0)
-    {
-	saveheight += desty;
-	sourcey -= desty;
-	desty = 0;
-    }
-    if (desty + saveheight > height)
-	saveheight = height - desty;
-
-    pMultibuffers->width = width;
-    pMultibuffers->height = height;
-    pMultibuffers->x = pWin->drawable.x;
-    pMultibuffers->y = pWin->drawable.y;
-
-    pGC = GetScratchGC (pWin->drawable.depth, pScreen);
-    if (clear)
-    {
-	SetupBackgroundPainter (pWin, pGC);
-	clearRect.x = 0;
-	clearRect.y = 0;
-	clearRect.width = width;
-	clearRect.height = height;
-    }
-    for (i = 0; i < pMultibuffers->numMultibuffer; i++)
-    {
-	pMultibuffer = &pMultibuffers->buffers[i];
-	pPixmap = (*pScreen->CreatePixmap) (pScreen, width, height,
-					    pWin->drawable.depth,
-					    CREATE_PIXMAP_USAGE_SCRATCH);
-	if (!pPixmap)
-	{
-	    DestroyImageBuffers (pWin);
-	    break;
-	}
-	ValidateGC ((DrawablePtr)pPixmap, pGC);
-	/*
-	 * I suppose this could avoid quite a bit of work if
-	 * it computed the minimal area required.
-	 */
-	if (clear)
-	    (*pGC->ops->PolyFillRect) ((DrawablePtr)pPixmap, pGC, 1, &clearRect);
-	if (pWin->bitGravity != ForgetGravity)
-	{
-	    (*pGC->ops->CopyArea) ((DrawablePtr)pMultibuffer->pPixmap,
-				   (DrawablePtr)pPixmap, pGC,
-				    sourcex, sourcey, savewidth, saveheight,
-				    destx, desty);
-	}
-	pPixmap->drawable.id = pMultibuffer->pPixmap->drawable.id;
-	(*pScreen->DestroyPixmap) (pMultibuffer->pPixmap);
-	pMultibuffer->pPixmap = pPixmap;
-	if (i != pMultibuffers->displayedMultibuffer)
-	{
-	    ChangeResourceValue (pPixmap->drawable.id,
-				 MultibufferDrawableResType,
-				 (pointer) pPixmap);
-	}
-    }
-    FreeScratchGC (pGC);
-    return TRUE;
-}
-
-/* Resource delete func for MultibufferDrawableResType */
-/*ARGSUSED*/
-static int
-MultibufferDrawableDelete (value, id)
-    pointer	value;
-    XID		id;
-{
-    DrawablePtr	pDrawable = (DrawablePtr)value;
-    WindowPtr	pWin;
-    MultibuffersPtr	pMultibuffers;
-    PixmapPtr	pPixmap;
-
-    if (pDrawable->type == DRAWABLE_WINDOW)
-    {
-	pWin = (WindowPtr) pDrawable;
-	pMultibuffers = (MultibuffersPtr) dixLookupPrivate(&pWin->devPrivates, MultibufferWindowPrivKey);
-	pPixmap = pMultibuffers->buffers[pMultibuffers->displayedMultibuffer].pPixmap;
-    }
-    else
-    {
-	pPixmap = (PixmapPtr) pDrawable;
-    }
-    (*pPixmap->drawable.pScreen->DestroyPixmap) (pPixmap);
-    return Success;
-}
-
-/* Resource delete func for MultibufferResType */
-/*ARGSUSED*/
-static int
-MultibufferDelete (value, id)
-    pointer	value;
-    XID		id;
-{
-    MultibufferPtr	pMultibuffer = (MultibufferPtr)value;
-    MultibuffersPtr	pMultibuffers;
-
-    pMultibuffers = pMultibuffer->pMultibuffers;
-    if (--pMultibuffers->refcnt == 0)
-    {
-	FreeResourceByType (pMultibuffers->pWindow->drawable.id,
-			    MultibuffersResType, TRUE);
-	xfree (pMultibuffers);
-    }
-    return Success;
-}
-
-/* Resource delete func for MultibuffersResType */
-/*ARGSUSED*/
-static int
-MultibuffersDelete (value, id)
-    pointer	value;
-    XID		id;
-{
-    MultibuffersPtr	pMultibuffers = (MultibuffersPtr)value;
-    int	i;
-
-    if (pMultibuffers->refcnt == pMultibuffers->numMultibuffer)
-    {
-	for (i = pMultibuffers->numMultibuffer; --i >= 0; )
-	    FreeResource (pMultibuffers->buffers[i].pPixmap->drawable.id, 0);
-    }
-    return Success;
-}
-
-/* Resource delete func for OtherClientResType */
-static int
-OtherClientDelete (value, id)
-    pointer	value;
-    XID		id;
-{
-    MultibufferPtr	pMultibuffer = (MultibufferPtr)value;
-    OtherClientsPtr	other, prev;
-
-    prev = 0;
-    for (other = pMultibuffer->otherClients; other; other = other->next)
-    {
-	if (other->resource == id)
-	{
-	    if (prev)
-		prev->next = other->next;
-	    else
-		pMultibuffer->otherClients = other->next;
-	    xfree (other);
-	    RecalculateMultibufferOtherEvents (pMultibuffer);
-	    break;
-	}
-	prev = other;
-    }
-    return Success;
-}
-
-static int
-EventSelectForMultibuffer (pMultibuffer, client, mask)
-    MultibufferPtr	pMultibuffer;
-    ClientPtr	client;
-    Mask	mask;
-{
-    OtherClientsPtr	other;
-
-    if (mask & ~ValidEventMasks)
-    {
-	client->errorValue = mask;
-	return BadValue;
-    }
-    if (bClient (pMultibuffer) == client)
-    {
-	pMultibuffer->eventMask = mask;
-    }
-    else /* some other client besides the creator wants events */
-    {
-	for (other = pMultibuffer->otherClients; other; other = other->next)
-	{
-	    if (SameClient (other, client))
-	    {
-		if (mask == 0)
-		{
-		    FreeResource (other->resource, RT_NONE);
-		    break;
-		}
-		other->mask = mask;
-		break;
-	    }
-	}
-	if (!other)
-	{ /* new client that never selected events on this buffer before */
-	    other = xalloc (sizeof (OtherClients));
-	    if (!other)
-		return BadAlloc;
-	    other->mask = mask;
-	    other->resource = FakeClientID (client->index);
-	    if (!AddResource (other->resource, OtherClientResType, (pointer) pMultibuffer))
-	    {
-		xfree (other);
-		return BadAlloc;
-	    }
-	    other->next = pMultibuffer->otherClients;
-	    pMultibuffer->otherClients = other;
-	}
-	RecalculateMultibufferOtherEvents (pMultibuffer);
-    }
-    return (client->noClientException);
-}
-
-/* or together all the otherClients event masks */
-static void
-RecalculateMultibufferOtherEvents (pMultibuffer)
-    MultibufferPtr	pMultibuffer;
-{
-    Mask	    otherEventMask;
-    OtherClients    *other;
-
-    otherEventMask = 0L;
-    for (other = pMultibuffer->otherClients; other; other = other->next)
-	otherEventMask |= other->mask;
-    pMultibuffer->otherEventMask = otherEventMask;
-}
-
-/* add milliseconds to a timestamp, handling overflow */
-static void
-BumpTimeStamp (ts, inc)
-TimeStamp   *ts;
-CARD32	    inc;
-{
-    CARD32  newms;
-
-    newms = ts->milliseconds + inc;
-    if (newms < ts->milliseconds)
-	ts->months++;
-    ts->milliseconds = newms;
-}
diff --git a/Xext/mbufbf.c b/Xext/mbufbf.c
deleted file mode 100644
index 7d9d60a4f..000000000
--- a/Xext/mbufbf.c
+++ /dev/null
@@ -1,1007 +0,0 @@
-/*
-
-Copyright 1989, 1998  The Open Group
-
-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.
-
-The above copyright notice and this permission notice shall be included in
-all copies or substantial portions of the Software.
-
-THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
-IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
-FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL THE
-OPEN GROUP BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN
-AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
-CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
-
-Except as contained in this notice, the name of The Open Group shall not be
-used in advertising or otherwise to promote the sale, use or other dealings
-in this Software without prior written authorization from The Open Group.
-
-*/
-
-
-#ifdef HAVE_DIX_CONFIG_H
-#include <dix-config.h>
-#endif
-
-#include <stdio.h>
-#include <X11/X.h>
-#include <X11/Xproto.h>
-#include "misc.h"
-#include "os.h"
-#include "windowstr.h"
-#include "scrnintstr.h"
-#include "pixmapstr.h"
-#include "extnsionst.h"
-#include "dixstruct.h"
-#include "resource.h"
-#include "opaque.h"
-#include "regionstr.h"
-#include "gcstruct.h"
-#include "inputstr.h"
-#include "validate.h"
-#include "globals.h"
-#include <sys/time.h>
-
-#define _MULTIBUF_SERVER_	/* don't want Xlib structures */
-#define _MULTIBUF_BUFFER_
-#include <X11/extensions/multibufst.h>
-
-/* 
-Support for doublebuffer hardare
-
-This code is designed to support doublebuffer hardware where the
-displayed buffer is selected on a per-pixel basis by an additional bit
-plane, called the select plane. It could probably be easily modified
-to work with systems that use window-id planes.
-
-This is done by creating a new drawable type, DRAWABLE_BUFFER. The
-type has the same exact layout as a window drawable. Your code should
-treat a DRAWABLE_BUFFER the same as it would tread a DRAWABLE_WINDOW
-when handling the gc drawing functions. In addition, PaintWindowBackground,
-CopyWindow, and all of the gc drawing functions to be able to draw into both
-framebuffers. Which framebuffer to draw into is selected by the contents of
-	pWin->devPrivates[frameWindowPrivateIndex].
-The content of the devPrivate is either from frameBuffer[0] or
-frameBuffer[1], depending on which buffer is being drawn into. When
-	pWin->devPrivates[frameWindowPrivateIndex] == frameBuffer[0],
-the functions should draw into the front framebuffer. When
-	pWin->devPrivates[frameWindowPrivateIndex] == frameBuffer[1],
-the functions should draw into the back framebuffer.
-
-In addition, you need to provide a function that allows you to copy
-bits between the buffers (optional since CopyArea can be used) and a
-function that draws into the select plane. Then, you need to register
-your functions and other information, by calling:
-
-void
-RegisterDoubleBufferHardware(pScreen, nInfo, pInfo, frameBuffer, selectPlane,
-			     CopyBufferBitsFunc, DrawSelectPlaneFunc)
-    int			nInfo;
-    xMbufBufferInfo	*pInfo;
-    DevUnion		*frameBuffer;
-    DevUnion		selectPlane;
-
-"pInfo" is an array indicating which visuals and depths that double
-buffering is supported on. "nInfo" is the length of the array.
-
-"frameBuffer" is array of length 2. The contents of the array element
-is ddx-specific. The content of frameBuffer[0] should, when placed in
-the window private, indicate that framebuffer 0 should be drawn into.
-The contents of frameBuffer[1], when placed into the window private,
-should indicate that framebuffer 1 should be drawn into.
-
-"selectPlane" is ddx-specific. It should contain information
-neccessary for your displayProc to access the select plane.
-It is passed to DrawSelectPlaneFunc.
-
-"CopyBufferBitsFunc" is a ddx-specific function that copies from one
-buffer of a multibuffered window to another buffer. If the CopyBufferBitsFunc
-is NULL, a default function will be used that calls pScreen->CopyArea.
-
-    void CopyBufferBitsFunc(pMBWindow, srcBufferNum, dstBufferNum)
-        mbufWindowPtr pMBWindow;
-        int srcBufferNum, dstBufferNum;
-
-"DrawSelectPlaneFunc" is a ddx-specific function that fills the
-regions "prgn" of select plane with the value "bufferNum". If 
-selectPlane is a DrawablePtr (such as a PixmapPtr), you can pass
-NULL for DrawSelectPlaneFunc, a default function will be used that
-calls FillRectangle on the selectPlane.
-
-    void DrawSelectPlaneFunc(pScreen, selectPlane, prgn, bufferNum)
-        ScreenPtr	pScreen;
-        DevUnion	selectPlane;
-        RegionPtr	prgn;
-        long		bufferNum;
-
-...
-...
-...
-
-*/
-
-#define MAX_BUFFERS  2	/* Only supports 2 buffers */
-#define FRONT_BUFFER 0
-#define BACK_BUFFER  1
-
-
-/* Buffer drawables have the same structure as window drawables */
-typedef WindowRec BufferRec;
-typedef WindowPtr BufferPtr;
-
-
-/*
- * Call RegisterHdwrBuffer for every screen that has doublebuffer hardware. 
- */
-
-static int		bufNumInfo[MAXSCREENS];
-static xMbufBufferInfo	*bufInfo[MAXSCREENS];
-static DevUnion		*bufFrameBuffer[MAXSCREENS];
-static DevUnion		bufselectPlane[MAXSCREENS];
-static void		(* bufCopyBufferBitsFunc[MAXSCREENS])();
-static void		(* bufDrawSelectPlaneFunc[MAXSCREENS])();
-
-static Bool bufMultibufferInit();
-
-
-void
-RegisterDoubleBufferHardware(pScreen, nInfo, pInfo, frameBuffer, selectPlane,
-			     CopyBufferBitsFunc, DrawSelectPlaneFunc)
-    ScreenPtr		pScreen;
-    int			nInfo;
-    xMbufBufferInfo	*pInfo;
-    DevUnion		*frameBuffer;
-    DevUnion		selectPlane;
-    void		(* CopyBufferBitsFunc)();
-    void		(* DrawSelectPlaneFunc)();
-{
-    bufNumInfo[pScreen->myNum]     = nInfo;
-    bufInfo[pScreen->myNum]        = pInfo;
-    bufFrameBuffer[pScreen->myNum] = frameBuffer;
-    bufselectPlane[pScreen->myNum] = selectPlane;
-
-    bufCopyBufferBitsFunc[pScreen->myNum]  = CopyBufferBitsFunc;
-    bufDrawSelectPlaneFunc[pScreen->myNum] = DrawSelectPlaneFunc;
-
-    /* Register ourselves with device-independent multibuffers code */
-    RegisterMultibufferInit(pScreen, bufMultibufferInit);
-}
-
-
-/*
- * Called by Multibuffer extension initialization.
- * Initializes mbufScreenRec and its devPrivate.
- */
-    
-static Bool NoopDDA_True() { return TRUE; }
-static Bool bufPositionWindow();
-static int  bufCreateImageBuffers();
-static void bufDestroyImageBuffers();
-static void bufDisplayImageBuffers();
-static void bufClearImageBufferArea();
-static void bufDestroyBuffer();
-static void bufCopyBufferBits();
-static void bufDrawSelectPlane();
-static void bufWrapScreenFuncs();
-static void bufResetProc();
-
-static void bufPostValidateTree();
-static void bufClipNotify();
-static void bufWindowExposures();
-static Bool bufChangeWindowAttributes();
-static void bufClearToBackground();
-static void bufCopyWindow();
-
-static Bool
-bufMultibufferInit(pScreen, pMBScreen)
-    ScreenPtr pScreen;
-    mbufScreenPtr pMBScreen;
-{
-    mbufBufferPrivPtr	pMBPriv;
-    BoxRec		box;
-
-    /* Multibuffer info */
-    pMBScreen->nInfo = bufNumInfo[pScreen->myNum];
-    pMBScreen->pInfo = bufInfo[pScreen->myNum];
-
-    /* Hooks */
-    pMBScreen->CreateImageBuffers = bufCreateImageBuffers;
-    pMBScreen->DestroyImageBuffers = bufDestroyImageBuffers;
-    pMBScreen->DisplayImageBuffers = bufDisplayImageBuffers;
-    pMBScreen->ClearImageBufferArea = bufClearImageBufferArea;
-    pMBScreen->ChangeMBufferAttributes = NoopDDA_True;
-    pMBScreen->ChangeBufferAttributes = NoopDDA_True;
-    pMBScreen->DeleteBufferDrawable = bufDestroyBuffer;
-    pMBScreen->WrapScreenFuncs = bufWrapScreenFuncs;
-    pMBScreen->ResetProc = bufResetProc;
-    /* Create devPrivate part */
-    pMBPriv = xalloc(sizeof *pMBPriv);
-    if (!pMBPriv)
-	return (FALSE);
-
-    pMBScreen->devPrivate.ptr = (pointer) pMBPriv;
-    pMBPriv->frameBuffer  = bufFrameBuffer[pScreen->myNum];
-    pMBPriv->selectPlane = bufselectPlane[pScreen->myNum];
-
-    /*
-     * Initializing the subtractRgn to the screen area will ensure that
-     * the selectPlane will get cleared on the first PostValidateTree.
-     */
-
-    box.x1 = 0;
-    box.y1 = 0;
-    box.x2 = pScreen->width;
-    box.y2 = pScreen->height;
-
-    pMBPriv->rgnChanged = TRUE;
-    REGION_INIT(pScreen, &pMBPriv->backBuffer, &box, 1);
-    REGION_INIT(pScreen, &pMBPriv->subtractRgn, &box, 1);
-    REGION_NULL(pScreen, &pMBPriv->unionRgn);
-
-    /* Misc functions */
-    pMBPriv->CopyBufferBits  = bufCopyBufferBitsFunc[pScreen->myNum];
-    pMBPriv->DrawSelectPlane = bufDrawSelectPlaneFunc[pScreen->myNum];
-
-    if (!pMBPriv->CopyBufferBits)
-	pMBPriv->CopyBufferBits = bufCopyBufferBits;
-
-    if (!pMBPriv->DrawSelectPlane)
-	pMBPriv->DrawSelectPlane = bufDrawSelectPlane;
-
-    /* screen functions */
-    pMBPriv->funcsWrapped = 0;
-    pMBPriv->inClearToBackground = FALSE;
-    pMBPriv->WindowExposures = NULL;
-    pMBPriv->CopyWindow = NULL;
-    pMBPriv->ClearToBackground = NULL;
-    pMBPriv->ClipNotify = NULL;
-    pMBPriv->ChangeWindowAttributes = NULL;
-
-    /* Start out wrapped to clear select plane */
-    WRAP_SCREEN_FUNC(pScreen,pMBPriv,PostValidateTree, bufPostValidateTree);
-    return TRUE;
-}
-
-static void
-UpdateBufferFromWindow(pBuffer, pWin)
-    BufferPtr	pBuffer;
-    WindowPtr	pWin;
-{
-    pBuffer->drawable.x      = pWin->drawable.x;
-    pBuffer->drawable.y      = pWin->drawable.y;
-    pBuffer->drawable.width  = pWin->drawable.width;
-    pBuffer->drawable.height = pWin->drawable.height;
-
-    pBuffer->drawable.serialNumber = NEXT_SERIAL_NUMBER;
-
-    /* Update for PaintWindowBackground */
-    pBuffer->parent = pWin->parent;
-
-    /*
-     * Make the borderClip the same as the clipList so
-     * NotClippedByChildren comes out with just clipList.
-     */
-
-    pBuffer->clipList   = pWin->clipList;
-    pBuffer->borderClip = pWin->clipList;
-    pBuffer->winSize    = pWin->winSize;
-    pBuffer->borderSize = pWin->borderSize;
-
-    pBuffer->origin = pWin->origin;
-}
-
-static BufferPtr
-bufCreateBuffer(pScreen, pWin, bufferNum)
-    ScreenPtr	pScreen;
-    WindowPtr	pWin;
-    int		bufferNum;
-{
-    mbufBufferPrivPtr	pMBPriv;
-    DevUnion	*devPrivates;
-    BufferPtr	pBuffer;
-    int		i;
-
-    pMBPriv = MB_SCREEN_PRIV_BUFFER(pScreen);
-
-    pBuffer = AllocateWindow(pWin->drawable.pScreen);
-    if (!pBuffer)
-	return (NULL);
-
-    /* XXX- Until we know what is needed, copy everything. */
-    devPrivates = pBuffer->devPrivates;
-    *pBuffer = *pWin;
-    pBuffer->devPrivates   = devPrivates;
-
-    pBuffer->drawable.type = DRAWABLE_BUFFER;
-    pBuffer->drawable.serialNumber = NEXT_SERIAL_NUMBER;
-
-    pBuffer->nextSib    = NULL;
-    pBuffer->prevSib    = NULL;
-    pBuffer->firstChild = NULL;
-    pBuffer->lastChild  = NULL;
-
-    /* XXX - Need to call pScreen->CreateWindow for tile/stipples
-     *       or should I just copy the devPrivates?
-     */
-    
-    for (i=0; i < pScreen->WindowPrivateLen; i++)
-	pBuffer->devPrivates[i] = pWin->devPrivates[i];
-
-    pBuffer->devPrivates[frameWindowPrivateIndex] =
-	pMBPriv->frameBuffer[bufferNum];
-
-    return pBuffer;
-}
-
-static void
-bufDestroyBuffer(pDrawable)
-    DrawablePtr	pDrawable;
-{
-    xfree(pDrawable);
-}
-
-/*ARGSUSED*/
-static int
-bufCreateImageBuffers (pWin, nbuf, ids, action, hint)
-    WindowPtr	pWin;
-    int		nbuf;
-    XID		*ids;
-    int		action;
-    int		hint;
-{
-    ScreenPtr		pScreen;
-    mbufScreenPtr	pMBScreen;
-    mbufWindowPtr	pMBWindow;
-    mbufBufferPtr	pMBBuffer;
-    int			i;
-
-    pScreen   = pWin->drawable.pScreen;
-    pMBScreen = MB_SCREEN_PRIV(pScreen);
-    pMBWindow = MB_WINDOW_PRIV(pWin);
-
-    pMBWindow->devPrivate.ptr = (pointer) REGION_CREATE(pScreen, 0,0);
-    if (!pMBWindow->devPrivate.ptr)
-	return(0);
-    REGION_COPY(pScreen, (RegionPtr) pMBWindow->devPrivate.ptr,
-			    &pWin->clipList);
-
-    for (i = 0; i < nbuf; i++)
-    {
-	pMBBuffer = pMBWindow->buffers + i;
-	pMBBuffer->pDrawable = (DrawablePtr) bufCreateBuffer(pScreen,pWin,i);
-
-	if (!pMBBuffer->pDrawable)
-	    break;
-
-	if (!AddResource (ids[i], MultibufferDrawableResType,
-			  (pointer) pMBBuffer->pDrawable))
-	{
-	    bufDestroyBuffer((BufferPtr) pMBBuffer->pDrawable);
-	    break;
-	}
-	pMBBuffer->pDrawable->id = ids[i];
-
-	/*
-	 * If window is already mapped, generate exposures and
-	 * clear the area of the newly buffers.
-	 */
-
-	if ((pWin->realized) && (i != pMBWindow->displayedMultibuffer))
-	    (* pMBScreen->ClearImageBufferArea)(pMBBuffer, 0,0, 0,0, TRUE);
-    }
-
-    return i;
-}
-
-static void
-bufDestroyImageBuffers(pWin)
-    WindowPtr	pWin;
-{
-    ScreenPtr		pScreen;
-    mbufWindowPtr	pMBWindow;
-
-    pScreen   = pWin->drawable.pScreen;
-
-    if (pMBWindow = MB_WINDOW_PRIV(pWin))
-    {
-	mbufBufferPrivPtr pMBPriv = MB_SCREEN_PRIV_BUFFER(pScreen);
-
-	/*
-	 * if the backbuffer is currently being displayed, move the bits
-	 * to the frontbuffer and display it instead.
-	 */
-
-	if (pWin->realized && (pMBWindow->displayedMultibuffer == BACK_BUFFER))
-	{
-	    (* pMBPriv->CopyBufferBits)(pMBWindow, BACK_BUFFER, FRONT_BUFFER);
-	    REGION_SUBTRACT(pScreen, &pMBPriv->backBuffer,
-				  &pMBPriv->backBuffer, &pWin->clipList);
-	    (* pMBPriv->DrawSelectPlane)(pScreen, pMBPriv->selectPlane,
-			    &pWin->clipList, FRONT_BUFFER);
-	}
-
-	/* Switch window rendering to front buffer */
-	pWin->devPrivates[frameWindowPrivateIndex] =
-	    pMBPriv->frameBuffer[FRONT_BUFFER];
-
-	REGION_DESTROY(pScreen, (RegionPtr) pMBWindow->devPrivate.ptr);
-	pMBWindow->devPrivate.ptr = NULL;
-    }
-}
-
-/*
- * Can be replaced by pScreen->ClearToBackground if pBuffer->eventMask
- * and wOtherEventsMasks(pBuffer) were setup.
- */
-
-static void
-bufClearImageBufferArea(pMBBuffer, x,y, w,h, generateExposures)
-    mbufBufferPtr	pMBBuffer;
-    short		x,y;
-    unsigned short	w,h;
-    Bool		generateExposures;
-{
-    BoxRec box;
-    RegionRec	reg;
-    RegionPtr pBSReg = NullRegion;
-    ScreenPtr	pScreen;
-    BoxPtr  extents;
-    int	    x1, y1, x2, y2;
-    BufferPtr pBuffer;
-
-    pBuffer = (BufferPtr) pMBBuffer->pDrawable;
-    /* compute everything using ints to avoid overflow */
-
-    x1 = pBuffer->drawable.x + x;
-    y1 = pBuffer->drawable.y + y;
-    if (w)
-        x2 = x1 + (int) w;
-    else
-        x2 = x1 + (int) pBuffer->drawable.width - (int) x;
-    if (h)
-        y2 = y1 + h;	
-    else
-        y2 = y1 + (int) pBuffer->drawable.height - (int) y;
-
-    extents = &pBuffer->clipList.extents;
-    
-    /* clip the resulting rectangle to the window clipList extents.  This
-     * makes sure that the result will fit in a box, given that the
-     * screen is < 32768 on a side.
-     */
-
-    if (x1 < extents->x1)
-	x1 = extents->x1;
-    if (x2 > extents->x2)
-	x2 = extents->x2;
-    if (y1 < extents->y1)
-	y1 = extents->y1;
-    if (y2 > extents->y2)
-	y2 = extents->y2;
-
-    if (x2 <= x1 || y2 <= y1)
-    {
-	x2 = x1 = 0;
-	y2 = y1 = 0;
-    }
-
-    box.x1 = x1;
-    box.x2 = x2;
-    box.y1 = y1;
-    box.y2 = y2;
-
-    pScreen = pBuffer->drawable.pScreen;
-    REGION_INIT(pScreen, &reg, &box, 1);
-
-    REGION_INTERSECT(pScreen, &reg, &reg, &pBuffer->clipList);
-    if (pBuffer->backgroundState != None)
-	miPaintWindow(pBuffer, &reg, PW_BACKGROUND);
-    if (generateExposures)
-	MultibufferExpose(pMBBuffer, &reg);
-#ifdef _notdef
-    /* XXBS - This is the original miClearToBackground code.
-     * WindowExposures needs to be called (or the functionality emulated)
-     * in order for backingStore to work, but first, pBuffer->eventMask
-     * and wOtherEventsMasks(pBuffer) need to be setup correctly.
-     */
-
-    if (generateExposures)
-	(*pScreen->WindowExposures)(pBuffer, &reg, pBSReg);
-    else if (pBuffer->backgroundState != None)
-        miPaintWindow(pBuffer, &reg, PW_BACKGROUND);
-#endif
-    REGION_UNINIT(pScreen, &reg);
-    if (pBSReg)
-	REGION_DESTROY(pScreen, pBSReg);
-}
-
-static void
-bufWrapScreenFuncs(pScreen)
-    ScreenPtr pScreen;
-{
-    mbufBufferPrivPtr pMBPriv = MB_SCREEN_PRIV_BUFFER(pScreen);
-
-    WRAP_SCREEN_FUNC(pScreen,pMBPriv,PostValidateTree, bufPostValidateTree);
-    WRAP_SCREEN_FUNC(pScreen,pMBPriv,ClipNotify, bufClipNotify);
-    WRAP_SCREEN_FUNC(pScreen,pMBPriv,WindowExposures,bufWindowExposures);
-    WRAP_SCREEN_FUNC(pScreen,pMBPriv,ChangeWindowAttributes, bufChangeWindowAttributes);
-    WRAP_SCREEN_FUNC(pScreen,pMBPriv,ClearToBackground,bufClearToBackground);
-    WRAP_SCREEN_FUNC(pScreen,pMBPriv,CopyWindow,bufCopyWindow);
-}
-
-static void
-bufResetProc(pScreen)
-    ScreenPtr pScreen;
-{
-    mbufBufferPrivPtr pMBPriv = MB_SCREEN_PRIV_BUFFER(pScreen);
-
-    /*
-     * frameBuffer, selectPlane, and pInfo should be freed by
-     * whoever called RegisterDoubleBufferHardware
-     */
-
-    REGION_UNINIT(pScreen, &pMBPriv->backBuffer);
-    REGION_UNINIT(pScreen, &pMBPriv->subtractRgn);
-    REGION_UNINIT(pScreen, &pMBPriv->unionRgn);
-    xfree(pMBPriv);
-}
-
-/*---------------------------------------------------------------------------*/
-
-/* 
- * Used if CopyBufferBitsFunc is not provided when registering.
- * This should work for everybody since CopyArea needs to support
- * copying between buffers anyway.
- */
-
-static void
-bufCopyBufferBits(pMBWindow, srcBufferNum, dstBufferNum)
-    mbufWindowPtr pMBWindow;
-    int srcBufferNum, dstBufferNum;
-{
-    DrawablePtr pSrcBuffer, pDstBuffer;
-    GCPtr pGC;
-
-    pSrcBuffer = pMBWindow->buffers[srcBufferNum].pDrawable;
-    pDstBuffer = pMBWindow->buffers[dstBufferNum].pDrawable;
-
-    pGC = GetScratchGC (pDstBuffer->depth, pDstBuffer->pScreen);
-    if (!pGC)
-	return;
-
-    ValidateGC (pDstBuffer, pGC);
-    (* pGC->ops->CopyArea) (pSrcBuffer, pDstBuffer, pGC,
-		    0,0, pDstBuffer->width, pDstBuffer->height, 0,0);
-    FreeScratchGC (pGC);
-}
-
-/*
- * Used if DrawSelectPlanFunc is not provided for when registering.
- * However, it only works if selectPlane.ptr is a drawable. Also
- * assumes that painting with color 0 selects the front buffer,
- * while color 1 selects the back buffer.
- */
-
-static void
-bufDrawSelectPlane(pScreen, selectPlane, prgn, bufferNum)
-    ScreenPtr	pScreen;
-    DevUnion	selectPlane;
-    RegionPtr	prgn;
-    long	bufferNum;
-{
-    DrawablePtr pDrawable;
-    GCPtr pGC;
-    int i;
-    BoxPtr pbox;
-    xRectangle *prect;
-    int numRects;
-    XID	value;
-
-    if (REGION_NUM_RECTS(prgn) == 0)
-	return;
-
-    pDrawable = (DrawablePtr) selectPlane.ptr;
-    pGC = GetScratchGC (pDrawable->depth, pScreen);
-    if (!pGC)
-	return;
-
-    prect = xalloc(REGION_NUM_RECTS(prgn) * sizeof(xRectangle));
-    if (!prect)
-    {
-	FreeScratchGC(pGC);
-	return;
-    }
-
-    value = (XID) bufferNum;
-    DoChangeGC(pGC, GCForeground, &value, 0);
-    ValidateGC(pDrawable, pGC);
-
-    numRects = REGION_NUM_RECTS(prgn);
-    pbox = REGION_RECTS(prgn);
-    for (i= numRects; --i >= 0; pbox++, prect++)
-    {
-	prect->x = pbox->x1;
-	prect->y = pbox->y1;
-	prect->width = pbox->x2 - pbox->x1;
-	prect->height = pbox->y2 - pbox->y1;
-    }
-    prect -= numRects;
-    (* pGC->ops->PolyFillRect)(pDrawable, pGC, numRects, prect);
-
-    xfree(prect);
-    FreeScratchGC (pGC);
-}
-
-
-static void
-bufDisplayImageBuffers(pScreen, ppMBWindow, ppMBBuffer, nbuf)
-    ScreenPtr		pScreen;
-    mbufBufferPtr	*ppMBBuffer;
-    mbufWindowPtr	*ppMBWindow;
-    int			nbuf;
-{
-    WindowPtr       pWin;
-    BufferPtr	    pPrevBuffer, pNewBuffer;
-    int		    i, number;
-    mbufBufferPrivPtr pMBPriv;
-    mbufBufferPtr   pPrevMBBuffer;
-
-    pMBPriv   = MB_SCREEN_PRIV_BUFFER(pScreen);
-
-    for (i = 0; i < nbuf; i++)
-    {
-	number = ppMBBuffer[i]->number; /* 0=frontbuffer, 1=backbuffer */
-	pWin = ppMBWindow[i]->pWindow;
-	pPrevMBBuffer = MB_DISPLAYED_BUFFER(ppMBWindow[i]);
-
-	pPrevBuffer = (BufferPtr) pPrevMBBuffer->pDrawable;
-	pNewBuffer  = (BufferPtr) ppMBBuffer[i]->pDrawable;
-
-	if (pPrevBuffer != pNewBuffer)
-	{
-	    RegionPtr backBuffer = &pMBPriv->backBuffer;
-
-	    /*
-	     * Update the select plane and the backBuffer region.
-	     */
-
-	    (* pMBPriv->DrawSelectPlane)(pScreen, pMBPriv->selectPlane,
-			    &pWin->clipList, number);
-
-	    if (number == BACK_BUFFER)
-		REGION_UNION(pScreen, backBuffer, backBuffer,
-				   &pWin->clipList);
-	    else
-		REGION_SUBTRACT(pScreen, backBuffer, backBuffer,
-				   &pWin->clipList);
-
-	    /* Switch which framebuffer the window draws into */
-	    pWin->devPrivates[frameWindowPrivateIndex] =
-		pMBPriv->frameBuffer[number];
-	}
-
-	switch (ppMBWindow[i]->updateAction)
-	{
-	case MultibufferUpdateActionUndefined:
-	    break;
-	case MultibufferUpdateActionBackground:
-	    (* MB_SCREEN_PRIV(pScreen)->ClearImageBufferArea)
-		(pPrevMBBuffer, 0,0, 0,0, FALSE);
-	    break;
-	case MultibufferUpdateActionUntouched:
-	    break;
-	case MultibufferUpdateActionCopied:
-	    if (pPrevBuffer != pNewBuffer)
-	    {
-		(* pMBPriv->CopyBufferBits) (ppMBWindow[i],
-			ppMBBuffer[i]->number, pPrevMBBuffer->number);
-	    }
-	    break;
-	}
-    }
-}
-
-/* Updates the backBuffer region and paints the selectPlane. */
-
-static void
-bufPostValidateTree(pParent, pChild, kind)
-    WindowPtr	pParent, pChild;
-    VTKind	kind;
-{
-    ScreenPtr pScreen;
-    mbufBufferPrivPtr pMBPriv;
-
-    if (pParent)
-	pScreen = pParent->drawable.pScreen;
-    else if (pChild)
-	pScreen = pChild->drawable.pScreen;
-    else
-	return; /* Hopeless */
-
-    pMBPriv = MB_SCREEN_PRIV_BUFFER(pScreen);
-
-    UNWRAP_SCREEN_FUNC(pScreen, pMBPriv, void, PostValidateTree);
-    if (pScreen->PostValidateTree)
-	(* pScreen->PostValidateTree)(pParent, pChild, kind);
-    REWRAP_SCREEN_FUNC(pScreen, pMBPriv, void, PostValidateTree);
-
-    /* Does backBuffer need to change? */
-    if (pMBPriv->rgnChanged)
-    {
-	RegionRec exposed;
-	RegionPtr pSubtractRgn, pUnionRgn;
-	Bool overlap;
-
-	pMBPriv->rgnChanged = FALSE;
-
-	pSubtractRgn = &pMBPriv->subtractRgn;
-	pUnionRgn    = &pMBPriv->unionRgn;
-	REGION_VALIDATE(pScreen, pSubtractRgn, &overlap);
-#ifdef DEBUG
-	if (overlap)
-	    FatalError("bufPostValidateTree: subtractRgn overlaps");
-#endif
-	REGION_VALIDATE(pScreen, pUnionRgn, &overlap);
-#ifdef DEBUG
-	if (overlap)
-	    FatalError("bufPostValidateTree: unionRgn overlaps");
-#endif
-
-	/* Update backBuffer: subtract must come before union */
-	REGION_SUBTRACT(pScreen, &pMBPriv->backBuffer, &pMBPriv->backBuffer,
-			      pSubtractRgn);
-	REGION_UNION(pScreen, &pMBPriv->backBuffer, &pMBPriv->backBuffer,
-			      pUnionRgn);
-
-	/* Paint gained and lost backbuffer areas in select plane */
-	REGION_NULL(pScreen, &exposed);
-	REGION_SUBTRACT(pScreen, &exposed, pSubtractRgn, pUnionRgn);
-	(* pMBPriv->DrawSelectPlane)(pScreen, pMBPriv->selectPlane,
-				     &exposed, FRONT_BUFFER);
-
-	REGION_SUBTRACT(pScreen, &exposed, pUnionRgn, pSubtractRgn);
-	(* pMBPriv->DrawSelectPlane)(pScreen, pMBPriv->selectPlane,
-				    &exposed, BACK_BUFFER);
-	
-	REGION_UNINIT(pScreen, &exposed);
-	REGION_EMPTY(pScreen, pSubtractRgn);
-	REGION_EMPTY(pScreen, pUnionRgn);
-    }
-}
-
-/*
- * If the window is multibuffered and displaying the backbuffer,
- * add the old clipList to the subtractRgn and add the new clipList
- * to the unionRgn. PostValidateTree will use subtractRgn and unionRgn
- * to update the backBuffer region and the selectPlane.
- *
- * Copy changes to the window structure into the buffers.
- * Send ClobberNotify events.
- */
-
-static void
-bufClipNotify(pWin, dx,dy)
-    WindowPtr pWin;
-    int       dx,dy;
-{
-    ScreenPtr pScreen = pWin->drawable.pScreen;
-    mbufBufferPrivPtr pMBPriv = MB_SCREEN_PRIV_BUFFER(pScreen);
-    mbufWindowPtr	pMBWindow;
-    int i;
-
-    UNWRAP_SCREEN_FUNC(pScreen, pMBPriv, void, ClipNotify);
-    if (pScreen->ClipNotify)
-	(* pScreen->ClipNotify)(pWin, dx,dy);
-    REWRAP_SCREEN_FUNC(pScreen, pMBPriv, void, ClipNotify);
-
-    if (pMBWindow = MB_WINDOW_PRIV(pWin))
-    {
-	RegionPtr pOldClipList = (RegionPtr) pMBWindow->devPrivate.ptr;
-
-	if (! REGION_EQUAL(pScreen, pOldClipList, &pWin->clipList))
-	{
-	    if (pMBWindow->displayedMultibuffer == BACK_BUFFER)
-	    {
-		pMBPriv->rgnChanged = TRUE;
-		REGION_APPEND(pScreen, &pMBPriv->subtractRgn, pOldClipList);
-		REGION_APPEND(pScreen, &pMBPriv->unionRgn, &pWin->clipList);
-	    }
-
-	    REGION_COPY(pScreen, pOldClipList,&pWin->clipList);
-	}
-
-	/* Update buffer x,y,w,h, and clipList */
-	for (i=0; i<pMBWindow->numMultibuffer; i++)
-	{
-	    mbufBufferPtr pMBBuffer = pMBWindow->buffers + i;
-	    if (pMBBuffer->clobber != pWin->visibility)
-	    {
-		pMBBuffer->clobber = pWin->visibility;
-		MultibufferClobber(pMBBuffer);
-	    }
-	    UpdateBufferFromWindow(pMBBuffer->pDrawable, pWin);
-	}
-    }
-}
-
-/*
- * Updates buffer's background fields when the window's changes.
- * This is necessary because miPaintWindow is used to paint the buffer.
- *
- * XXBS - Backingstore state will have be tracked too if it is supported.
- */
-
-static Bool
-bufChangeWindowAttributes(pWin, mask)
-    WindowPtr pWin;
-    unsigned long mask;
-{
-    ScreenPtr pScreen = pWin->drawable.pScreen;
-    mbufBufferPrivPtr pMBPriv = MB_SCREEN_PRIV_BUFFER(pScreen);
-    mbufWindowPtr pMBWindow;
-    Bool ret;
-
-    UNWRAP_SCREEN_FUNC(pScreen, pMBPriv, Bool, ChangeWindowAttributes);
-    ret = (* pScreen->ChangeWindowAttributes)(pWin, mask);
-    REWRAP_SCREEN_FUNC(pScreen, pMBPriv, Bool, ChangeWindowAttributes);
-
-    if (pMBWindow = MB_WINDOW_PRIV(pWin))
-    {
-	if (mask & (CWBackPixmap | CWBackPixel))
-	{
-	    BufferPtr pBuffer;
-	    int i;
-
-	    for (i=0; i<pMBWindow->displayedMultibuffer; i++)
-	    {
-		pBuffer = (BufferPtr) pMBWindow->buffers[i].pDrawable;
-		pBuffer->backgroundState = pWin->backgroundState;
-		pBuffer->background = pWin->background;
-	    }
-	}
-    }
-    return ret;
-}
-
-/*
- * Send exposures and clear the background for a buffer whenever
- * its corresponding window is exposed, except when called by
- * ClearToBackground.
- */
-
-static void 
-bufWindowExposures(pWin, prgn, other_exposed)
-    WindowPtr pWin;
-    RegionPtr prgn, other_exposed;
-{
-    ScreenPtr pScreen = pWin->drawable.pScreen;
-    mbufWindowPtr pMBWindow = MB_WINDOW_PRIV(pWin);
-    mbufBufferPrivPtr pMBPriv = MB_SCREEN_PRIV_BUFFER(pScreen);
-    RegionRec tmp_rgn;
-    int i;
-    Bool handleBuffers;
-
-    handleBuffers = (!pMBPriv->inClearToBackground) &&
-	(pWin->drawable.type == DRAWABLE_WINDOW) &&
-	pMBWindow && (prgn && !REGION_NIL(prgn));
-
-    /* miWindowExposures munges prgn and other_exposed. */
-    if (handleBuffers)
-    {
-	REGION_NULL(pScreen, &tmp_rgn);
-	REGION_COPY(pScreen, &tmp_rgn, prgn);
-    }
-
-    UNWRAP_SCREEN_FUNC(pScreen, pMBPriv, void, WindowExposures);
-    (* pScreen->WindowExposures) (pWin, prgn, other_exposed);
-    REWRAP_SCREEN_FUNC(pScreen, pMBPriv, void, WindowExposures);
-
-    if (!handleBuffers)
-	return;
-
-    /*
-     * Send expose events to all clients. Paint the exposed region for all
-     * buffers except the displayed buffer since it is handled when the
-     * window is painted.
-     *
-     * XXBS - Will have to be re-written to handle BackingStore on buffers.
-     */
-
-    for (i=0; i<pMBWindow->numMultibuffer; i++)
-    {
-	mbufBufferPtr pMBBuffer;
-	BufferPtr pBuffer;
-
-	pMBBuffer = pMBWindow->buffers + i;
-	pBuffer = (BufferPtr) pMBBuffer->pDrawable;
-
-	if (i != pMBWindow->displayedMultibuffer)
-	    miPaintWindow(pBuffer, &tmp_rgn, PW_BACKGROUND);
-	if ((pMBBuffer->otherEventMask | pMBBuffer->eventMask) & ExposureMask)
-	    MultibufferExpose(pMBBuffer, &tmp_rgn);
-    }
-
-    REGION_UNINIT(pScreen, &tmp_rgn);
-}
-
-/*
- * Set ``inClearToBackground'' so that WindowExposures does not attempt
- * to send expose events or clear the background on the buffers.
- */
-
-static void
-bufClearToBackground(pWin, x,y,w,h, sendExpose)
-    WindowPtr pWin;
-    int x,y, w,h;
-    Bool sendExpose;
-{
-    ScreenPtr pScreen = pWin->drawable.pScreen;
-    mbufBufferPrivPtr pMBPriv = MB_SCREEN_PRIV_BUFFER(pScreen);
-
-    pMBPriv->inClearToBackground = TRUE;
-
-    UNWRAP_SCREEN_FUNC(pScreen, pMBPriv, void, ClearToBackground);
-    (* pScreen->ClearToBackground)(pWin, x,y,w,h, sendExpose);
-    REWRAP_SCREEN_FUNC(pScreen, pMBPriv, void, ClearToBackground);
-
-    pMBPriv->inClearToBackground = FALSE;
-}
-
-/*
- * Move bits in both buffers. It does this by calling pScreen->CopyWindow
- * twice, once with the root window's devPrivate[frameWindowPrivateIndex]
- * pointing to the frontbuffer pixmap and once with it pointed to the
- * backbuffer pixmap. It does this if there are *any* existing multibuffered
- * window... a possible optimization is to copy the backbuffer only if this
- * window or its inferiors are multibuffered. May be faster, maybe not.
- *
- * XXX - Only works if your CopyWindow checks the root window's devPrivate
- *       to see which buffer to draw into. Works for cfbPaintWindow.
- */
-
-/*ARGSUSED*/
-static void 
-bufCopyWindow(pWin, ptOldOrg, prgnSrc)
-    WindowPtr pWin;
-    DDXPointRec ptOldOrg;
-    RegionPtr prgnSrc;
-{
-    ScreenPtr pScreen = pWin->drawable.pScreen;
-    mbufBufferPrivPtr pMBPriv = MB_SCREEN_PRIV_BUFFER(pScreen);
-    WindowPtr pwinroot;
-    DevUnion save;
-
-    UNWRAP_SCREEN_FUNC(pScreen, pMBPriv, void, CopyWindow);
-
-    pwinroot = WindowTable[pScreen->myNum];
-    save = pwinroot->devPrivates[frameWindowPrivateIndex];
-
-    /*
-     * Copy front buffer
-     */
-
-    pwinroot->devPrivates[frameWindowPrivateIndex] =
-	pMBPriv->frameBuffer[FRONT_BUFFER];
-    (* pScreen->CopyWindow)(pWin, ptOldOrg, prgnSrc);
-
-    /*
-     * Copy back buffer
-     */
-
-    /* CopyWindow translates prgnSrc... translate it back for 2nd call. */
-    REGION_TRANSLATE(pScreen, prgnSrc,
-				  ptOldOrg.x - pWin->drawable.x,
-				  ptOldOrg.y - pWin->drawable.y);
-    pwinroot->devPrivates[frameWindowPrivateIndex] =
-	pMBPriv->frameBuffer[BACK_BUFFER];
-    (* pScreen->CopyWindow)(pWin, ptOldOrg, prgnSrc);
-
-    pwinroot->devPrivates[frameWindowPrivateIndex] = save;
-    REWRAP_SCREEN_FUNC(pScreen, pMBPriv, void, CopyWindow);
-}
diff --git a/Xext/mbufpx.c b/Xext/mbufpx.c
deleted file mode 100644
index 8421ba9eb..000000000
--- a/Xext/mbufpx.c
+++ /dev/null
@@ -1,648 +0,0 @@
-/************************************************************
-
-Copyright 1989, 1998  The Open Group
-
-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.
-
-The above copyright notice and this permission notice shall be included in
-all copies or substantial portions of the Software.
-
-THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
-IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
-FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL THE
-OPEN GROUP BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN
-AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
-CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
-
-Except as contained in this notice, the name of The Open Group shall not be
-used in advertising or otherwise to promote the sale, use or other dealings
-in this Software without prior written authorization from The Open Group.
-
-********************************************************/
-
-#ifdef HAVE_DIX_CONFIG_H
-#include <dix-config.h>
-#endif
-
-#include <stdio.h>
-#include <X11/X.h>
-#include <X11/Xproto.h>
-#include "misc.h"
-#include "os.h"
-#include "windowstr.h"
-#include "scrnintstr.h"
-#include "pixmapstr.h"
-#include "extnsionst.h"
-#include "dixstruct.h"
-#include "resource.h"
-#include "opaque.h"
-#include "regionstr.h"
-#include "gcstruct.h"
-#include "inputstr.h"
-#include <sys/time.h>
-
-#define _MULTIBUF_SERVER_	/* don't want Xlib structures */
-#define _MULTIBUF_PIXMAP_
-#include <X11/extensions/multibufst.h>
-
-
-static Bool NoopDDA_True() { return TRUE; }
-
-static Bool pixPositionWindow();
-static int  pixCreateImageBuffers();
-static void pixDisplayImageBuffers();
-static void pixClearImageBufferArea();
-static void pixDeleteBufferDrawable();
-static void pixWrapScreenFuncs();
-static void pixResetProc();
-
-Bool
-pixMultibufferInit(pScreen, pMBScreen)
-    ScreenPtr pScreen;
-    mbufScreenPtr pMBScreen;
-{
-    int			i, j, k;
-    xMbufBufferInfo	*pInfo;
-    int			nInfo;
-    DepthPtr		pDepth;
-    mbufPixmapPrivPtr	pMBPriv;
-
-    pMBScreen->CreateImageBuffers = pixCreateImageBuffers;
-    pMBScreen->DestroyImageBuffers = (void (*)())NoopDDA;
-    pMBScreen->DisplayImageBuffers = pixDisplayImageBuffers;
-    pMBScreen->ClearImageBufferArea = pixClearImageBufferArea;
-    pMBScreen->ChangeMBufferAttributes = NoopDDA_True;
-    pMBScreen->ChangeBufferAttributes = NoopDDA_True;
-    pMBScreen->DeleteBufferDrawable = pixDeleteBufferDrawable;
-    pMBScreen->WrapScreenFuncs = pixWrapScreenFuncs;
-    pMBScreen->ResetProc = pixResetProc;
-
-    /* Support every depth and visual combination that the screen does */
-
-    nInfo = 0;
-    for (i = 0; i < pScreen->numDepths; i++)
-    {
-	pDepth = &pScreen->allowedDepths[i];
-	nInfo += pDepth->numVids;
-    }
-
-    pInfo = xalloc (nInfo * sizeof (xMbufBufferInfo));
-    if (!pInfo)
-	return FALSE;
-
-    k = 0;
-    for (i = 0; i < pScreen->numDepths; i++)
-    {
-	pDepth = &pScreen->allowedDepths[i];
-	for (j = 0; j < pDepth->numVids; j++)
-	{
-	    pInfo[k].visualID = pDepth->vids[j];
-	    pInfo[k].maxBuffers = 0;
-	    pInfo[k].depth = pDepth->depth;
-	    k++;
-	}
-    }
-
-    pMBScreen->nInfo = nInfo;
-    pMBScreen->pInfo = pInfo;
-
-    /*
-     * Setup the devPrivate to mbufScreenRec
-     */
-
-    pMBPriv = xalloc(sizeof(* pMBPriv));
-    if (!pMBPriv)
-    {
-	xfree(pInfo);
-	return (FALSE);
-    }
-    pMBScreen->devPrivate.ptr = (pointer) pMBPriv;
-    pMBPriv->PositionWindow = NULL;
-    pMBPriv->funcsWrapped = 0;
-
-    return TRUE;
-}
-
-/*ARGSUSED*/
-static int
-pixCreateImageBuffers (pWin, nbuf, ids, action, hint)
-    WindowPtr	pWin;
-    int		nbuf;
-    XID		*ids;
-    int		action;
-    int		hint;
-{
-    mbufWindowPtr	pMBWindow;
-    mbufBufferPtr	pMBBuffer;
-    ScreenPtr		pScreen;
-    int			width, height, depth;
-    int			i;
-
-    pMBWindow = MB_WINDOW_PRIV(pWin);
-
-    width = pWin->drawable.width;
-    height = pWin->drawable.height;
-    depth = pWin->drawable.depth;
-    pScreen = pWin->drawable.pScreen;
-
-    for (i = 0; i < nbuf; i++)
-    {
-	pMBBuffer = &pMBWindow->buffers[i];
-	pMBBuffer->pDrawable = (DrawablePtr)
-	    (*pScreen->CreatePixmap) (pScreen, width, height, depth, 0);
-	if (!pMBBuffer->pDrawable)
-	    break;
-
-	if (!AddResource (ids[i], MultibufferDrawableResType,
-			  (pointer) pMBBuffer->pDrawable))
-	{
-	    (*pScreen->DestroyPixmap) ((PixmapPtr) pMBBuffer->pDrawable);
-	    break;
-	}
-	pMBBuffer->pDrawable->id = ids[i];
-
-	/*
-	 * In the description of the CreateImageBuffers request:
-         * "If the window is mapped, or if these image buffers have
-         *  backing store, their contents will be tiled with the window
-         *  background, and zero or more expose events will be generated
-         *  for each of these buffers."
-	 */
-
-	(* MB_SCREEN_PRIV(pScreen)->ClearImageBufferArea)
-	    (pMBBuffer, 0,0, 0,0, TRUE);
-    }
-
-    return i;
-}
-
-/*
- * set up the gc to clear the pixmaps;
- */
-static Bool
-SetupBackgroundPainter (pWin, pGC)
-    WindowPtr	pWin;
-    GCPtr	pGC;
-{
-    XID		    gcvalues[4];
-    int		    ts_x_origin, ts_y_origin;
-    PixUnion	    background;
-    int		    backgroundState;
-    Mask	    gcmask;
-
-    /*
-     * First take care of any ParentRelative stuff by altering the
-     * tile/stipple origin to match the coordinates of the upper-left
-     * corner of the first ancestor without a ParentRelative background.
-     * This coordinate is, of course, negative.
-     */
-
-    ts_x_origin = ts_y_origin = 0;
-    while (pWin->backgroundState == ParentRelative) {
-	ts_x_origin -= pWin->origin.x;
-	ts_y_origin -= pWin->origin.y;
-	pWin = pWin->parent;
-    }
-    backgroundState = pWin->backgroundState;
-    background = pWin->background;
-
-    switch (backgroundState)
-    {
-    case BackgroundPixel:
-	gcvalues[0] = (XID) background.pixel;
-	gcvalues[1] = FillSolid;
-	gcmask = GCForeground|GCFillStyle;
-	break;
-
-    case BackgroundPixmap:
-	gcvalues[0] = FillTiled;
-	gcvalues[1] = (XID) background.pixmap;
-	gcvalues[2] = ts_x_origin;
-	gcvalues[3] = ts_y_origin;
-	gcmask = GCFillStyle|GCTile|GCTileStipXOrigin|GCTileStipYOrigin;
-	break;
-
-    default:
-	return FALSE;
-    }
-    DoChangeGC(pGC, gcmask, gcvalues, TRUE);
-    return TRUE;
-}
-
-static void
-MultibufferPaintBackgroundRectangles(pWin, pDrawable, nrects, pRects)
-    WindowPtr pWin;
-    DrawablePtr pDrawable;
-    int nrects;
-    xRectangle *pRects;
-{
-    GCPtr      pGC;
-
-    pGC = GetScratchGC (pWin->drawable.depth, pWin->drawable.pScreen);
-    if (SetupBackgroundPainter(pWin, pGC))
-    {
-	ValidateGC(pDrawable, pGC);
-	(*pGC->ops->PolyFillRect) (pDrawable, pGC, nrects, pRects);
-    }
-    FreeScratchGC(pGC);
-}
-
-static void
-MultibufferPaintBackgroundRegion(pWin, pDrawable, pRegion)
-    WindowPtr pWin;
-    DrawablePtr pDrawable;
-    RegionPtr pRegion;
-{
-    xRectangle *pRects;
-    int nrects  = REGION_NUM_RECTS(pRegion);
-    BoxPtr pbox = REGION_RECTS(pRegion);
-
-    pRects = xalloc(nrects * sizeof(xRectangle));
-    if (pRects)
-    {
-	int i;
-	for (i = 0; i < nrects; i++)
-	{
-	    pRects[i].x = pbox->x1;
-	    pRects[i].y = pbox->y1;
-	    pRects[i].width  = pbox->x2 - pbox->x1;
-	    pRects[i].height = pbox->y2 - pbox->y1;
-	}
-	MultibufferPaintBackgroundRectangles(pWin, pDrawable, nrects, pRects);
-	xfree(pRects);
-    }
-}
-
-static void
-pixDisplayImageBuffers(pScreen, ppMBWindow, ppMBBuffer, nbuf)
-    mbufBufferPtr	    *ppMBBuffer;
-    mbufWindowPtr	    *ppMBWindow;
-    int		    nbuf;
-{
-    GCPtr	    pGC = NULL;
-    PixmapPtr	    pPrevPixmap, pNewPixmap;
-    WindowPtr	    pWin;
-    RegionPtr	    pExposed;
-    int		    i;
-    mbufBufferPtr  pPrevMBBuffer;
-    XID		    bool;
-    xRectangle      r;
-
-    UpdateCurrentTime ();
-    for (i = 0; i < nbuf; i++)
-    {
-	pWin = ppMBWindow[i]->pWindow;
-
-	/* Time to get a different scratch GC? */
-
-	if (!pGC
-	    || pGC->depth   != pWin->drawable.depth
-	    || pGC->pScreen != pWin->drawable.pScreen)
-	{
-	    if (pGC) FreeScratchGC(pGC);
-	    pGC = GetScratchGC (pWin->drawable.depth, pWin->drawable.pScreen);
-	}
-	pPrevMBBuffer = MB_DISPLAYED_BUFFER(ppMBWindow[i]);
-	pPrevPixmap = (PixmapPtr) pPrevMBBuffer->pDrawable;
-	pNewPixmap = (PixmapPtr) ppMBBuffer[i]->pDrawable;
-
-	if (pPrevPixmap == pNewPixmap)
-	{
-	  /* "If a specified buffer is already displayed, any delays and
-	   *  update action will still be performed for that buffer."
-	   *
-	   *  We special-case this because applications do occasionally
-	   *  request a redundant DisplayImageBuffers, and we can save
-	   *  strokes by recognizing that the only update action that will
-	   *  change the buffer contents in this case is Background.
-	   */
-	    if (ppMBWindow[i]->updateAction == MultibufferUpdateActionBackground)
-	    {
-		r.x = r.y = 0;
-		r.width  = pWin->drawable.width;
-		r.height = pWin->drawable.height;
-		MultibufferPaintBackgroundRectangles(pWin, (DrawablePtr)pWin,
-						     1, &r);
-	    }
-	}
-	else /* different buffer is being displayed */
-	{
-	    /* perform update action */
-
-	    switch (ppMBWindow[i]->updateAction)
-	    {
-	    case MultibufferUpdateActionUndefined:
-		break;
-
-	    case MultibufferUpdateActionBackground:
-
-		r.x = r.y = 0;
-		r.width  = pPrevPixmap->drawable.width;
-		r.height = pPrevPixmap->drawable.height;
-		MultibufferPaintBackgroundRectangles(pWin,
-						     (DrawablePtr)pPrevPixmap,
-						     1, &r);
-		break;
-
-	    case MultibufferUpdateActionUntouched:
-		
-		/* copy the window to the pixmap that represents the
-		 * currently displayed buffer
-		 */
-
-		if (pPrevMBBuffer->eventMask & ExposureMask)
-		{
-		    bool = TRUE;
-		    DoChangeGC (pGC, GCGraphicsExposures, &bool, FALSE);
-		}
-		ValidateGC ((DrawablePtr)pPrevPixmap, pGC);
-		pExposed = (*pGC->ops->CopyArea)((DrawablePtr) pWin,
-						 (DrawablePtr) pPrevPixmap,
-						 pGC,
-						 0, 0,
-						 pWin->drawable.width,
-						 pWin->drawable.height,
-						 0, 0);
-
-		/* if we couldn't copy the whole window to the buffer,
-		 * send expose events (if any client wants them)
-		 */
-
-		if (pPrevMBBuffer->eventMask & ExposureMask)
-		{ /* some client wants expose events */
-		    if (pExposed)
-		    {
-			RegionPtr	 pWinSize;
-			extern RegionPtr CreateUnclippedWinSize();
-			ScreenPtr pScreen = pWin->drawable.pScreen;
-			pWinSize = CreateUnclippedWinSize (pWin);
-			/*
-			 * pExposed is window-relative, but at this point
-			 * pWinSize is screen-relative.  Make pWinSize be
-			 * window-relative so that region ops involving
-			 * pExposed and pWinSize behave sensibly.
-			 */
-			REGION_TRANSLATE(pScreen, pWinSize,
-						     -pWin->drawable.x,
-						     -pWin->drawable.y);
-			REGION_INTERSECT(pScreen, pExposed, pExposed, pWinSize);
-			REGION_DESTROY(pScreen, pWinSize);
-			MultibufferExpose (pPrevMBBuffer, pExposed);
-			REGION_DESTROY(pScreen, pExposed);
-		    }
-		    bool = FALSE;
-		    DoChangeGC (pGC, GCGraphicsExposures, &bool, FALSE);
-		} /* end some client wants expose events */
-
-		break; /* end case MultibufferUpdateActionUntouched */
-
-	    case MultibufferUpdateActionCopied:
-
-		ValidateGC ((DrawablePtr)pPrevPixmap, pGC);
-		(*pGC->ops->CopyArea) ((DrawablePtr)pNewPixmap,
-				       (DrawablePtr)pPrevPixmap, pGC,
-				       0, 0, pWin->drawable.width,
-				       pWin->drawable.height, 0, 0);
-		break;
-
-	    } /* end switch on update action */
-
-	    /* display the new buffer */
-
-	    ValidateGC ((DrawablePtr)pWin, pGC);
-	    (*pGC->ops->CopyArea) ((DrawablePtr)pNewPixmap, (DrawablePtr)pWin,
-				   pGC, 0, 0,
-				   pWin->drawable.width, pWin->drawable.height,
-				   0, 0);
-	}
-
-	ppMBWindow[i]->lastUpdate = currentTime;
-    }
-
-    if (pGC) FreeScratchGC (pGC);
-    return;
-}
-
-/*
- * resize the buffers when the window is resized
- */ 
-
-static Bool
-pixPositionWindow (pWin, x, y)
-    WindowPtr	pWin;
-    int		x, y;
-{
-    ScreenPtr	    pScreen;
-    mbufPixmapPrivPtr pMBPriv;
-    mbufWindowPtr   pMBWindow;
-    mbufBufferPtr   pMBBuffer;
-    int		    width, height;
-    int		    i;
-    int		    dx, dy, dw, dh;
-    int		    sourcex, sourcey;
-    int		    destx, desty;
-    PixmapPtr	    pPixmap;
-    GCPtr	    pGC;
-    int		    savewidth, saveheight;
-    Bool	    clear;
-    RegionRec       exposedRegion;
-    Bool	    ret;
-
-    pScreen = pWin->drawable.pScreen;
-    pMBPriv = MB_SCREEN_PRIV_PIXMAP(pScreen);
-
-    UNWRAP_SCREEN_FUNC(pScreen, pMBPriv, Bool, PositionWindow);
-    ret = (* pScreen->PositionWindow) (pWin, x, y);
-    REWRAP_SCREEN_FUNC(pScreen, pMBPriv, Bool, PositionWindow);
-
-    if (!(pMBWindow = MB_WINDOW_PRIV(pWin)))
-	return ret;
-
-    /* if new size is same as old, we're done */
-
-    if (pMBWindow->width == pWin->drawable.width &&
-        pMBWindow->height == pWin->drawable.height)
-	return ret;
-
-    width = pWin->drawable.width;
-    height = pWin->drawable.height;
-    dx = pWin->drawable.x - pMBWindow->x;
-    dy = pWin->drawable.x - pMBWindow->y;
-    dw = width - pMBWindow->width;
-    dh = height - pMBWindow->height;
-    GravityTranslate (0, 0, -dx, -dy, dw, dh,
-		      pWin->bitGravity, &destx, &desty);
-
-    /* if the window grew, remember to paint the window background,
-     * and maybe send expose events, for the new areas of the buffers
-     */
-
-    clear = pMBWindow->width < width || pMBWindow->height < height ||
-	    pWin->bitGravity == ForgetGravity;
-
-    sourcex = 0;
-    sourcey = 0;
-    savewidth = pMBWindow->width;
-    saveheight = pMBWindow->height;
-    /* clip rectangle to source and destination */
-    if (destx < 0)
-    {
-	savewidth += destx;
-	sourcex -= destx;
-	destx = 0;
-    }
-    if (destx + savewidth > width)
-	savewidth = width - destx;
-    if (desty < 0)
-    {
-	saveheight += desty;
-	sourcey -= desty;
-	desty = 0;
-    }
-    if (desty + saveheight > height)
-	saveheight = height - desty;
-
-    pMBWindow->width = width;
-    pMBWindow->height = height;
-    pMBWindow->x = pWin->drawable.x;
-    pMBWindow->y = pWin->drawable.y;
-
-    if (clear)
-    {
-	BoxRec box;
-
-	box.x1 = box.y1 = 0;
-	box.x2 = width;
-	box.y2 = height;
-	REGION_INIT(pScreen, &exposedRegion, &box, 1);
-	if (pWin->bitGravity != ForgetGravity)
-	{
-	    RegionRec preservedRegion;
-	    box.x1 = destx;
-	    box.y1 = desty;
-	    box.x2 = destx + savewidth;
-	    box.y2 = desty + saveheight;
-	    REGION_INIT(pScreen, &preservedRegion, &box, 1);
-	    REGION_SUBTRACT(pScreen, &exposedRegion, &exposedRegion, &preservedRegion);
-	    REGION_UNINIT(pScreen, &preservedRegion);
-	}
-
-    } /* end if (clear) */
-
-    pGC = GetScratchGC (pWin->drawable.depth, pScreen);
-
-    /* create buffers with new window size */
-
-    for (i = 0; i < pMBWindow->numMultibuffer; i++)
-    {
-	pMBBuffer = &pMBWindow->buffers[i];
-	pPixmap = (*pScreen->CreatePixmap) (pScreen, width, height, pWin->drawable.depth,
-					    CREATE_PIXMAP_USAGE_SCRATCH);
-	if (!pPixmap)
-	{
-	    (* MB_SCREEN_PRIV(pScreen)->DestroyImageBuffers)(pWin);
-	    break;
-	}
-	if (clear)
-	{
-	    MultibufferPaintBackgroundRegion(pWin, (DrawablePtr)pPixmap, &exposedRegion);
-	    MultibufferExpose(pMBBuffer, &exposedRegion);
-	}
-	if (pWin->bitGravity != ForgetGravity)
-	{
-	    ValidateGC ((DrawablePtr)pPixmap, pGC);
-	    (*pGC->ops->CopyArea) (pMBBuffer->pDrawable, (DrawablePtr)pPixmap,
-				   pGC,
-				   sourcex, sourcey, savewidth, saveheight,
-				   destx, desty);
-	}
-	pPixmap->drawable.id = pMBBuffer->pDrawable->id;
-	(*pScreen->DestroyPixmap) ((PixmapPtr) pMBBuffer->pDrawable);
-	pMBBuffer->pDrawable = (DrawablePtr) pPixmap;
-	if (i != pMBWindow->displayedMultibuffer)
-	{
-	    ChangeResourceValue (pPixmap->drawable.id,
-				 MultibufferDrawableResType,
-				 (pointer) pPixmap);
-	}
-    }
-    FreeScratchGC (pGC);
-    if (clear)
-	REGION_UNINIT(pScreen, &exposedRegion);
-    return TRUE;
-}
-
-static void
-pixWrapScreenFuncs(pScreen)
-    ScreenPtr pScreen;
-{
-    mbufPixmapPrivPtr pMBPriv = MB_SCREEN_PRIV_PIXMAP(pScreen);
-    WRAP_SCREEN_FUNC(pScreen, pMBPriv, PositionWindow, pixPositionWindow);
-}
-
-static void
-pixResetProc(pScreen)
-    ScreenPtr pScreen;
-{
-    mbufScreenPtr pMBScreen = MB_SCREEN_PRIV(pScreen);
-    mbufPixmapPrivPtr pMBPriv = MB_SCREEN_PRIV_PIXMAP(pScreen);
-
-    xfree(pMBScreen->pInfo);
-    xfree(pMBPriv);
-}
-
-static void
-pixClearImageBufferArea(pMBBuffer, x,y, width,height, exposures)
-    mbufBufferPtr	pMBBuffer;
-    short		x, y;
-    unsigned short	width, height;
-    Bool		exposures;
-{
-    WindowPtr pWin;
-    ScreenPtr pScreen;
-    BoxRec box;
-    RegionRec region;
-    int w_width, w_height;
-    DrawablePtr pDrawable;
-
-    pWin = pMBBuffer->pMBWindow->pWindow;
-    pScreen = pWin->drawable.pScreen;
-
-    w_width  = pWin->drawable.width;
-    w_height = pWin->drawable.height;
-
-    box.x1 = x;
-    box.y1 = y;
-    box.x2 = width  ? (box.x1 + width)  : w_width;
-    box.y2 = height ? (box.y1 + height) : w_height;
-
-    if (box.x1 < 0)        box.x1 = 0;
-    if (box.y1 < 0)        box.y1 = 0;
-    if (box.x2 > w_width)  box.x2 = w_width;
-    if (box.y2 > w_height) box.y2 = w_height;
-
-    REGION_INIT(pScreen, &region, &box, 1);
-
-    if (pMBBuffer->number == pMBBuffer->pMBWindow->displayedMultibuffer)
-      pDrawable = (DrawablePtr) pWin;
-    else
-      pDrawable = pMBBuffer->pDrawable;
-
-    MultibufferPaintBackgroundRegion(pWin, pDrawable, &region);
-
-    if (exposures)
-	MultibufferExpose(pMBBuffer, &region);
-
-    REGION_UNINIT(pScreen, &region);
-}
-
-static void
-pixDeleteBufferDrawable(pDrawable)
-    DrawablePtr	pDrawable;
-{
-    (* pDrawable->pScreen->DestroyPixmap)((PixmapPtr) pDrawable);
-}
diff --git a/Xext/sync.c b/Xext/sync.c
index ce6531467..b68f430d4 100644
--- a/Xext/sync.c
+++ b/Xext/sync.c
@@ -2174,7 +2174,6 @@ static XSyncValue *pnext_time;
 
 /*
 *** Server Block Handler
-*** code inspired by multibuffer extension
  */
 /*ARGSUSED*/
 static void
diff --git a/Xext/xtest.c b/Xext/xtest.c
index 5af2b5c83..5d0bffca5 100644
--- a/Xext/xtest.c
+++ b/Xext/xtest.c
@@ -357,8 +357,6 @@ ProcXTestFakeInput(ClientPtr client)
         activateTime.milliseconds = ms;
         ev->u.keyButtonPointer.time = 0;
 
-        /* see mbuf.c:QueueDisplayRequest for code similar to this */
-
         if (!ClientSleepUntil(client, &activateTime, NULL, NULL))
         {
             return BadAlloc;
diff --git a/configure.ac b/configure.ac
index 591d2b445..ec1831e8e 100644
--- a/configure.ac
+++ b/configure.ac
@@ -632,7 +632,6 @@ AC_ARG_ENABLE(xselinux,       AS_HELP_STRING([--disable-xselinux], [Build SELinu
 AC_ARG_ENABLE(xcsecurity,     AS_HELP_STRING([--disable-xcsecurity], [Build Security extension (default: disabled)]), [XCSECURITY=$enableval], [XCSECURITY=no])
 AC_ARG_ENABLE(xcalibrate,     AS_HELP_STRING([--enable-xcalibrate], [Build XCalibrate extension (default: disabled)]), [XCALIBRATE=$enableval], [XCALIBRATE=no])
 AC_ARG_ENABLE(tslib,          AS_HELP_STRING([--enable-tslib], [Build kdrive tslib touchscreen support (default: disabled)]), [TSLIB=$enableval], [TSLIB=no])
-AC_ARG_ENABLE(multibuffer,    AS_HELP_STRING([--enable-multibuffer], [Build Multibuffer extension (default: disabled)]), [MULTIBUFFER=$enableval], [MULTIBUFFER=no])
 AC_ARG_ENABLE(dbe,            AS_HELP_STRING([--disable-dbe], [Build DBE extension (default: enabled)]), [DBE=$enableval], [DBE=yes])
 AC_ARG_ENABLE(xf86bigfont,    AS_HELP_STRING([--disable-xf86bigfont], [Build XF86 Big Font extension (default: disabled)]), [XF86BIGFONT=$enableval], [XF86BIGFONT=no])
 AC_ARG_ENABLE(dpms,           AS_HELP_STRING([--disable-dpms], [Build DPMS extension (default: enabled)]), [DPMSExtension=$enableval], [DPMSExtension=yes])
@@ -1085,12 +1084,6 @@ if test "x$XCSECURITY" = xyes; then
 	AC_DEFINE(XCSECURITY, 1, [Build Security extension])
 fi
 
-AM_CONDITIONAL(MULTIBUFFER, [test "x$MULTIBUFFER" = xyes])
-if test "x$MULTIBUFFER" = xyes; then
-	AC_DEFINE(MULTIBUFFER, 1, [Build Multibuffer extension])
-	# Requires xextproto which is always required
-fi
-
 AM_CONDITIONAL(DBE, [test "x$DBE" = xyes])
 if test "x$DBE" = xyes; then
 	AC_DEFINE(DBE, 1, [Support DBE extension])
diff --git a/hw/xfree86/dixmods/extmod/modinit.c b/hw/xfree86/dixmods/extmod/modinit.c
index 299562592..7d2086802 100644
--- a/hw/xfree86/dixmods/extmod/modinit.c
+++ b/hw/xfree86/dixmods/extmod/modinit.c
@@ -47,15 +47,6 @@ static ExtensionModule extensionModules[] = {
 	NULL
     },
 #endif
-#ifdef MULTIBUFFER
-    {
-	MultibufferExtensionInit,
-	MULTIBUFFER_PROTOCOL_NAME,
-	&noMultibufferExtension,
-	NULL,
-	NULL
-    },
-#endif
 #ifdef SCREENSAVER
     {
 	ScreenSaverExtensionInit,
diff --git a/hw/xfree86/dixmods/extmod/modinit.h b/hw/xfree86/dixmods/extmod/modinit.h
index 6210526aa..1154e4601 100644
--- a/hw/xfree86/dixmods/extmod/modinit.h
+++ b/hw/xfree86/dixmods/extmod/modinit.h
@@ -9,11 +9,6 @@
 
 #include <X11/extensions/shapeproto.h>
 
-#ifdef MULTIBUFFER
-extern void MultibufferExtensionInit(INITARGS);
-#include <X11/extensions/multibufproto.h>
-#endif
-
 #ifdef XTEST
 extern void XTestExtensionInit(INITARGS);
 #include <X11/extensions/xtestproto.h>
diff --git a/include/dix-config.h.in b/include/dix-config.h.in
index 058c8fd14..9aff6134e 100644
--- a/include/dix-config.h.in
+++ b/include/dix-config.h.in
@@ -360,9 +360,6 @@
 /* Support Xv extension */
 #undef XV
 
-/* Build Multibuffer extension */
-#undef MULTIBUFFER
-
 /* Support DRI extension */
 #undef XF86DRI
 
diff --git a/include/globals.h b/include/globals.h
index 52c19a490..82e86c31a 100644
--- a/include/globals.h
+++ b/include/globals.h
@@ -69,10 +69,6 @@ extern _X_EXPORT Bool noScreenSaverExtension;
 extern _X_EXPORT Bool noMITShmExtension;
 #endif
 
-#ifdef MULTIBUFFER
-extern _X_EXPORT Bool noMultibufferExtension;
-#endif
-
 #ifdef RANDR
 extern _X_EXPORT Bool noRRExtension;
 #endif
diff --git a/mi/miinitext.c b/mi/miinitext.c
index 692be86f4..a8674a094 100644
--- a/mi/miinitext.c
+++ b/mi/miinitext.c
@@ -55,7 +55,6 @@ SOFTWARE.
 
 #ifdef HAVE_DMX_CONFIG_H
 #include <dmx-config.h>
-#undef MULTIBUFFER
 #undef XV
 #undef DBE
 #undef XF86VIDMODE
@@ -116,9 +115,6 @@ extern Bool noScreenSaverExtension;
 #ifdef MITSHM
 extern Bool noMITShmExtension;
 #endif
-#ifdef MULTIBUFFER
-extern Bool noMultibufferExtension;
-#endif
 #ifdef RANDR
 extern Bool noRRExtension;
 #endif
@@ -195,9 +191,6 @@ typedef void (*InitExtension)(INITARGS);
 #ifdef MITSHM
 extern void ShmExtensionInit(INITARGS);
 #endif
-#ifdef MULTIBUFFER
-extern void MultibufferExtensionInit(INITARGS);
-#endif
 #ifdef PANORAMIX
 extern void PanoramiXExtensionInit(INITARGS);
 #endif
@@ -308,9 +301,6 @@ static ExtensionToggle ExtensionToggleList[] =
 #ifdef MITSHM
     { SHMNAME, &noMITShmExtension },
 #endif
-#ifdef MULTIBUFFER
-    { "Multi-Buffering", &noMultibufferExtension },
-#endif
 #ifdef RANDR
     { "RANDR", &noRRExtension },
 #endif
@@ -416,9 +406,6 @@ InitExtensions(int argc, char *argv[])
 #ifdef MITSHM
     if (!noMITShmExtension) ShmExtensionInit();
 #endif
-#ifdef MULTIBUFFER
-    if (!noMultibufferExtension) MultibufferExtensionInit();
-#endif
     XInputExtensionInit();
 #ifdef XTEST
     if (!noTestExtensions) XTestExtensionInit();
diff --git a/os/utils.c b/os/utils.c
index 13d3b3ff0..127b47bb3 100644
--- a/os/utils.c
+++ b/os/utils.c
@@ -148,9 +148,6 @@ Bool noScreenSaverExtension = FALSE;
 #ifdef MITSHM
 Bool noMITShmExtension = FALSE;
 #endif
-#ifdef MULTIBUFFER
-Bool noMultibufferExtension = FALSE;
-#endif
 #ifdef RANDR
 Bool noRRExtension = FALSE;
 #endif