Merge branch 'Ionic-feature/composite-update' into 3.6.x

17 files changed, 2147 insertions, 393 deletions

diff --git a/nx-X11/programs/Xserver/composite/Imakefile b/nx-X11/programs/Xserver/composite/Imakefile
index f121e0bbe..911950182 100644
--- a/nx-X11/programs/Xserver/composite/Imakefile
+++ b/nx-X11/programs/Xserver/composite/Imakefile
@@ -1,8 +1,8 @@
 #include <Server.tmpl>
 
-       SRCS =	compalloc.c compext.c compinit.c compwindow.c
+       SRCS =	compalloc.c compext.c compinit.c compoverlay.c compwindow.c
 
-       OBJS =	compalloc.o compext.o compinit.o compwindow.o
+       OBJS =	compalloc.o compext.o compinit.o compoverlay.o compwindow.o
 
    INCLUDES =   -I../include -I../mi -I../Xext -I../render -I../xfixes \
 		-I../damageext -I../miext/damage -I$(EXTINCSRC) \
@@ -11,6 +11,8 @@
 
    LINTLIBS = ../dix/llib-ldix.ln ../os/llib-los.ln
 
+   DEFINES = -DNXAGENT_SERVER
+
 NormalLibraryTarget(composite,$(OBJS))
 NormalLibraryObjectRule()
 LintLibraryTarget(composite,$(SRCS))
diff --git a/nx-X11/programs/Xserver/composite/compalloc.c b/nx-X11/programs/Xserver/composite/compalloc.c
index f66a90989..9279a5248 100644
--- a/nx-X11/programs/Xserver/composite/compalloc.c
+++ b/nx-X11/programs/Xserver/composite/compalloc.c
@@ -28,36 +28,110 @@
 
 #include "compint.h"
 
-void
-compReportDamage (DamagePtr pDamage, RegionPtr pRegion, void *closure)
+static void
+compScreenUpdate(ScreenPtr pScreen)
 {
-    WindowPtr	    pWin = (WindowPtr) closure;
-    ScreenPtr	    pScreen = pWin->drawable.pScreen;
-    CompScreenPtr   cs = GetCompScreen (pScreen);
-    CompWindowPtr   cw = GetCompWindow (pWin);
+    compCheckTree(pScreen);
+    compPaintChildrenToWindow(pScreen, WindowTable[pScreen->myNum]);
+}
+
+static void
+compBlockHandler(int i, void *blockData, void *pTimeout, void *pReadmask)
+{
+    ScreenPtr pScreen = screenInfo.screens[i];
+    CompScreenPtr cs = GetCompScreen(pScreen);
 
+    pScreen->BlockHandler = cs->BlockHandler;
+    compScreenUpdate(pScreen);
+    (*pScreen->BlockHandler) (i, blockData, pTimeout, pReadmask);
+
+    /* Next damage will restore the block handler */
+    cs->BlockHandler = NULL;
+}
+
+static void
+compReportDamage(DamagePtr pDamage, RegionPtr pRegion, void *closure)
+{
+    WindowPtr pWin = (WindowPtr) closure;
+    ScreenPtr pScreen = pWin->drawable.pScreen;
+    CompScreenPtr cs = GetCompScreen(pScreen);
+    CompWindowPtr cw = GetCompWindow(pWin);
+
+    if (!cs->BlockHandler) {
+        cs->BlockHandler = pScreen->BlockHandler;
+        pScreen->BlockHandler = compBlockHandler;
+    }
     cs->damaged = TRUE;
     cw->damaged = TRUE;
+
+    /* Mark the ancestors */
+    /* We can't do this, Dave. No damagedDescendants support. */
+    /*
+    pWin = pWin->parent;
+    while (pWin) {
+        if (pWin->damagedDescendants)
+            break;
+        pWin->damagedDescendants = TRUE;
+        pWin = pWin->parent;
+    }
+    */
 }
 
 static void
-compDestroyDamage (DamagePtr pDamage, void *closure)
+compDestroyDamage(DamagePtr pDamage, void *closure)
 {
-    WindowPtr	    pWin = (WindowPtr) closure;
-    CompWindowPtr   cw = GetCompWindow (pWin);
+    WindowPtr pWin = (WindowPtr) closure;
+    CompWindowPtr cw = GetCompWindow(pWin);
 
     cw->damage = 0;
 }
 
+static Bool
+compMarkWindows(WindowPtr pWin, WindowPtr *ppLayerWin)
+{
+    ScreenPtr pScreen = pWin->drawable.pScreen;
+    WindowPtr pLayerWin = pWin;
+
+    if (!pWin->viewable)
+        return FALSE;
+
+    (*pScreen->MarkOverlappedWindows) (pWin, pWin, &pLayerWin);
+    (*pScreen->MarkWindow) (pLayerWin->parent);
+
+    *ppLayerWin = pLayerWin;
+
+    return TRUE;
+}
+
+static void
+compHandleMarkedWindows(WindowPtr pWin, WindowPtr pLayerWin)
+{
+    ScreenPtr pScreen = pWin->drawable.pScreen;
+
+    (*pScreen->ValidateTree) (pLayerWin->parent, pLayerWin, VTOther);
+    (*pScreen->HandleExposures) (pLayerWin->parent);
+    if (pScreen->PostValidateTree)
+        (*pScreen->PostValidateTree) (pLayerWin->parent, pLayerWin, VTOther);
+}
+
 /*
  * Redirect one window for one client
  */
 int
-compRedirectWindow (ClientPtr pClient, WindowPtr pWin, int update)
+compRedirectWindow(ClientPtr pClient, WindowPtr pWin, int update)
 {
-    CompWindowPtr	cw = GetCompWindow (pWin);
-    CompClientWindowPtr	ccw;
-    Bool		wasMapped = pWin->mapped;
+    CompWindowPtr cw = GetCompWindow(pWin);
+    CompClientWindowPtr ccw;
+    CompScreenPtr cs = GetCompScreen(pWin->drawable.pScreen);
+    WindowPtr pLayerWin;
+    Bool anyMarked = FALSE;
+
+    if (pWin == cs->pOverlayWin) {
+        return Success;
+    }
+
+    if (!pWin->parent)
+        return BadMatch;
 
     /*
      * Only one Manual update is allowed
@@ -100,8 +174,8 @@ compRedirectWindow (ClientPtr pClient, WindowPtr pWin, int update)
 	    xfree (cw);
 	    return BadAlloc;
 	}
-	if (wasMapped)
-	    UnmapWindow (pWin, FALSE);
+
+        anyMarked = compMarkWindows(pWin, &pLayerWin);
 
 	RegionNull(&cw->borderClip);
 	cw->update = CompositeRedirectAutomatic;
@@ -110,7 +184,8 @@ compRedirectWindow (ClientPtr pClient, WindowPtr pWin, int update)
 	cw->oldy = COMP_ORIGIN_INVALID;
 	cw->damageRegistered = FALSE;
 	cw->damaged = FALSE;
-	pWin->devPrivates[CompWindowPrivateIndex].ptr = cw;
+        cw->pOldPixmap = NullPixmap;
+        FAKE_DIX_SET_WINDOW_PRIVATE(pWin, cw);
     }
     ccw->next = cw->clients;
     cw->clients = ccw;
@@ -118,30 +193,59 @@ compRedirectWindow (ClientPtr pClient, WindowPtr pWin, int update)
 	return BadAlloc;
     if (ccw->update == CompositeRedirectManual)
     {
-	if (cw->damageRegistered)
-	{
+        if (!anyMarked)
+            anyMarked = compMarkWindows(pWin, &pLayerWin);
+
+        if (cw->damageRegistered) {
 	    DamageUnregister (&pWin->drawable, cw->damage);
 	    cw->damageRegistered = FALSE;
 	}
 	cw->update = CompositeRedirectManual;
     }
+    else if (cw->update == CompositeRedirectAutomatic && !cw->damageRegistered) {
+        if (!anyMarked)
+            anyMarked = compMarkWindows(pWin, &pLayerWin);
+    }
 
     if (!compCheckRedirect (pWin))
     {
 	FreeResource (ccw->id, RT_NONE);
 	return BadAlloc;
     }
-    if (wasMapped && !pWin->mapped)
-    {
-	Bool	overrideRedirect = pWin->overrideRedirect;
-	pWin->overrideRedirect = TRUE;
-	MapWindow (pWin, pClient);
-	pWin->overrideRedirect = overrideRedirect;
-    }
+
+    if (anyMarked)
+        compHandleMarkedWindows(pWin, pLayerWin);
     
     return Success;
 }
 
+void
+compRestoreWindow(WindowPtr pWin, PixmapPtr pPixmap)
+{
+    ScreenPtr pScreen = pWin->drawable.pScreen;
+    WindowPtr pParent = pWin->parent;
+
+    if (pParent->drawable.depth == pWin->drawable.depth) {
+        GCPtr pGC = GetScratchGC(pWin->drawable.depth, pScreen);
+        int bw = (int) pWin->borderWidth;
+        int x = bw;
+        int y = bw;
+        int w = pWin->drawable.width;
+        int h = pWin->drawable.height;
+
+        if (pGC) {
+            ChangeGCVal val;
+
+            val.val = IncludeInferiors;
+            dixChangeGC(NullClient, pGC, GCSubwindowMode, NULL, &val);
+            ValidateGC(&pWin->drawable, pGC);
+            (*pGC->ops->CopyArea) (&pPixmap->drawable,
+                                   &pWin->drawable, pGC, x, y, w, h, 0, 0);
+            FreeScratchGC(pGC);
+        }
+    }
+}
+
 /*
  * Free one of the per-client per-window resources, clearing
  * redirect and the per-window pointer as appropriate
@@ -149,9 +253,12 @@ compRedirectWindow (ClientPtr pClient, WindowPtr pWin, int update)
 void
 compFreeClientWindow (WindowPtr pWin, XID id)
 {
+    ScreenPtr pScreen = pWin->drawable.pScreen;
     CompWindowPtr	cw = GetCompWindow (pWin);
     CompClientWindowPtr	ccw, *prev;
-    Bool		wasMapped = pWin->mapped;
+    Bool anyMarked = FALSE;
+    WindowPtr pLayerWin;
+    PixmapPtr pPixmap = NULL;
 
     if (!cw)
 	return;
@@ -168,33 +275,38 @@ compFreeClientWindow (WindowPtr pWin, XID id)
     }
     if (!cw->clients)
     {
-	if (wasMapped)
-	    UnmapWindow (pWin, FALSE);
-    
-	if (pWin->redirectDraw)
-	    compFreePixmap (pWin);
+        anyMarked = compMarkWindows(pWin, &pLayerWin);
+
+	if (pWin->redirectDraw != RedirectDrawNone) {
+            pPixmap = (*pScreen->GetWindowPixmap) (pWin);
+            compSetParentPixmap(pWin);
+	}
 
 	if (cw->damage)
 	    DamageDestroy (cw->damage);
 	
 	RegionUninit(&cw->borderClip);
     
-	pWin->devPrivates[CompWindowPrivateIndex].ptr = 0;
+        FAKE_DIX_SET_WINDOW_PRIVATE(pWin, NULL);
 	xfree (cw);
     }
     else if (cw->update == CompositeRedirectAutomatic &&
-	     !cw->damageRegistered && pWin->redirectDraw)
+	     !cw->damageRegistered && pWin->redirectDraw != RedirectDrawNone)
     {
+        anyMarked = compMarkWindows(pWin, &pLayerWin);
+
 	DamageRegister (&pWin->drawable, cw->damage);
 	cw->damageRegistered = TRUE;
+        pWin->redirectDraw = RedirectDrawAutomatic;
 	DamageDamageRegion (&pWin->drawable, &pWin->borderSize);
     }
-    if (wasMapped && !pWin->mapped)
-    {
-	Bool	overrideRedirect = pWin->overrideRedirect;
-	pWin->overrideRedirect = TRUE;
-	MapWindow (pWin, clients[CLIENT_ID(id)]);
-	pWin->overrideRedirect = overrideRedirect;
+
+    if (anyMarked)
+        compHandleMarkedWindows(pWin, pLayerWin);
+
+    if (pPixmap) {
+        compRestoreWindow(pWin, pPixmap);
+        (*pScreen->DestroyPixmap) (pPixmap);
     }
 }
 
@@ -261,7 +373,7 @@ compRedirectSubwindows (ClientPtr pClient, WindowPtr pWin, int update)
 	}
 	csw->update = CompositeRedirectAutomatic;
 	csw->clients = 0;
-	pWin->devPrivates[CompSubwindowsPrivateIndex].ptr = csw;
+        FAKE_DIX_SET_SUBWINDOWS_PRIVATE(pWin, csw);
     }
     /*
      * Redirect all existing windows
@@ -276,7 +388,7 @@ compRedirectSubwindows (ClientPtr pClient, WindowPtr pWin, int update)
 	    if (!csw->clients)
 	    {
 		xfree (csw);
-		pWin->devPrivates[CompSubwindowsPrivateIndex].ptr = 0;
+                FAKE_DIX_SET_SUBWINDOWS_PRIVATE(pWin, NULL);
 	    }
 	    xfree (ccw);
 	    return ret;
@@ -349,7 +461,7 @@ compFreeClientSubwindows (WindowPtr pWin, XID id)
      */
     if (!csw->clients)
     {
-	pWin->devPrivates[CompSubwindowsPrivateIndex].ptr = 0;
+        FAKE_DIX_SET_SUBWINDOWS_PRIVATE(pWin, NULL);
 	xfree (csw);
     }
 }
@@ -425,9 +537,10 @@ compNewPixmap (WindowPtr pWin, int x, int y, int w, int h)
     ScreenPtr	    pScreen = pWin->drawable.pScreen;
     WindowPtr	    pParent = pWin->parent;
     PixmapPtr	    pPixmap;
-    GCPtr	    pGC;
 
-    pPixmap = (*pScreen->CreatePixmap) (pScreen, w, h, pWin->drawable.depth);
+    /* usage_hint unsupported by our old server infrastructure. */
+    pPixmap = (*pScreen->CreatePixmap) (pScreen, w, h, pWin->drawable.depth /*,
+                                        CREATE_PIXMAP_USAGE_BACKING_PIXMAP */);
 
     if (!pPixmap)
 	return 0;
@@ -435,25 +548,60 @@ compNewPixmap (WindowPtr pWin, int x, int y, int w, int h)
     pPixmap->screen_x = x;
     pPixmap->screen_y = y;
     
-    pGC = GetScratchGC (pWin->drawable.depth, pScreen);
+    if (pParent->drawable.depth == pWin->drawable.depth) {
+    	GCPtr pGC = GetScratchGC (pWin->drawable.depth, pScreen);
     
-    /*
-     * Copy bits from the parent into the new pixmap so that it will
-     * have "reasonable" contents in case for background None areas.
-     */
-    if (pGC)
-    {
-	XID val = IncludeInferiors;
-	
-	ValidateGC(&pPixmap->drawable, pGC);
-	dixChangeGC (serverClient, pGC, GCSubwindowMode, &val, NULL);
-	(*pGC->ops->CopyArea) (&pParent->drawable,
-			       &pPixmap->drawable,
-			       pGC,
-			       x - pParent->drawable.x,
-			       y - pParent->drawable.y,
-			       w, h, 0, 0);
-	FreeScratchGC (pGC);
+        /*
+         * Copy bits from the parent into the new pixmap so that it will
+         * have "reasonable" contents in case for background None areas.
+         */
+        if (pGC)
+        {
+	    ChangeGCVal val;
+
+	    val.val = IncludeInferiors;
+            dixChangeGC(NullClient, pGC, GCSubwindowMode, NULL, &val);
+	    ValidateGC(&pPixmap->drawable, pGC);
+	    (*pGC->ops->CopyArea) (&pParent->drawable,
+	 		           &pPixmap->drawable,
+			           pGC,
+			           x - pParent->drawable.x,
+			           y - pParent->drawable.y,
+			           w, h, 0, 0);
+	    FreeScratchGC (pGC);
+        }
+    }
+    else {
+	PictFormatPtr	pSrcFormat = compWindowFormat (pParent);
+	PictFormatPtr	pDstFormat = compWindowFormat (pWin);
+        XID inferiors = IncludeInferiors;
+        int error;
+
+        PicturePtr pSrcPicture = CreatePicture(None,
+                                               &pParent->drawable,
+                                               pSrcFormat,
+                                               CPSubwindowMode,
+                                               &inferiors,
+                                               serverClient, &error);
+
+        PicturePtr pDstPicture = CreatePicture(None,
+                                               &pPixmap->drawable,
+                                               pDstFormat,
+                                               0, 0,
+                                               serverClient, &error);
+
+        if (pSrcPicture && pDstPicture) {
+            CompositePicture(PictOpSrc,
+                             pSrcPicture,
+                             NULL,
+                             pDstPicture,
+                             x - pParent->drawable.x,
+                             y - pParent->drawable.y, 0, 0, 0, 0, w, h);
+        }
+        if (pSrcPicture)
+            FreePicture(pSrcPicture, 0);
+        if (pDstPicture)
+            FreePicture(pDstPicture, 0);
     }
     return pPixmap;
 }
@@ -471,7 +619,11 @@ compAllocPixmap (WindowPtr pWin)
 
     if (!pPixmap)
 	return FALSE;
-    pWin->redirectDraw = TRUE;
+    if (cw->update == CompositeRedirectAutomatic)
+        pWin->redirectDraw = RedirectDrawAutomatic;
+    else
+        pWin->redirectDraw = RedirectDrawManual;
+
     compSetPixmap (pWin, pPixmap);
     cw->oldx = COMP_ORIGIN_INVALID;
     cw->oldy = COMP_ORIGIN_INVALID;
@@ -481,14 +633,21 @@ compAllocPixmap (WindowPtr pWin)
 	DamageRegister (&pWin->drawable, cw->damage);
 	cw->damageRegistered = TRUE;
     }
+
+    /* Make sure our borderClip is up to date */
+    RegionUninit(&cw->borderClip);
+    RegionCopy(&cw->borderClip, &pWin->borderClip);
+    cw->borderClipX = pWin->drawable.x;
+    cw->borderClipY = pWin->drawable.y;
+
     return TRUE;
 }
 
 void
-compFreePixmap (WindowPtr pWin)
+compSetParentPixmap (WindowPtr pWin)
 {
     ScreenPtr	    pScreen = pWin->drawable.pScreen;
-    PixmapPtr	    pRedirectPixmap, pParentPixmap;
+    PixmapPtr	    pParentPixmap;
     CompWindowPtr   cw = GetCompWindow (pWin);
 
     if (cw->damageRegistered)
@@ -504,11 +663,9 @@ compFreePixmap (WindowPtr pWin)
      * parent exposed area; regions beyond the parent cause crashes
      */
     RegionCopy(&pWin->borderClip, &cw->borderClip);
-    pRedirectPixmap = (*pScreen->GetWindowPixmap) (pWin);
     pParentPixmap = (*pScreen->GetWindowPixmap) (pWin->parent);
-    pWin->redirectDraw = FALSE;
+    pWin->redirectDraw = RedirectDrawNone;
     compSetPixmap (pWin, pParentPixmap);
-    (*pScreen->DestroyPixmap) (pRedirectPixmap);
 }
 
 /*
@@ -527,7 +684,7 @@ compReallocPixmap (WindowPtr pWin, int draw_x, int draw_y,
     int		    pix_x, pix_y;
     int		    pix_w, pix_h;
 
-    assert (cw && pWin->redirectDraw);
+    assert (cw && pWin->redirectDraw != RedirectDrawNone);
     cw->oldx = pOld->screen_x;
     cw->oldy = pOld->screen_y;
     pix_x = draw_x - bw;
diff --git a/nx-X11/programs/Xserver/composite/compext.c b/nx-X11/programs/Xserver/composite/compext.c
index f57235d46..d5f8fd6d4 100644
--- a/nx-X11/programs/Xserver/composite/compext.c
+++ b/nx-X11/programs/Xserver/composite/compext.c
@@ -27,18 +27,44 @@
 #endif
 
 #include "compint.h"
+#include "XI.h"
+#include "XIproto.h"
+#include "extinit.h"
+
+#ifndef SERVER_COMPOSITE_MAJOR_VERSION
+#define SERVER_COMPOSITE_MAJOR_VERSION 0
+#endif
+
+#ifndef SERVER_COMPOSITE_MINOR_VERSION
+#define SERVER_COMPOSITE_MINOR_VERSION 4
+#endif
 
 static CARD8	CompositeReqCode;
-int		CompositeClientPrivateIndex;
+
+#ifndef NXAGENT_SERVER
+static DevPrivateKeyRec CompositeClientPrivateKeyRec;
+
+#define CompositeClientPrivateKey (&CompositeClientPrivateKeyRec)
+#else /* !defined(NXAGENT_SERVER) */
+static int CompositeClientPrivIndex = -1;
+#endif /* !defined(NXAGENT_SERVER) */
+
 RESTYPE		CompositeClientWindowType;
 RESTYPE		CompositeClientSubwindowsType;
+RESTYPE CompositeClientOverlayType;
 
 typedef struct _CompositeClient {
     int	    major_version;
     int	    minor_version;
 } CompositeClientRec, *CompositeClientPtr;
 
-#define GetCompositeClient(pClient)    ((CompositeClientPtr) (pClient)->devPrivates[CompositeClientPrivateIndex].ptr)
+#ifndef NXAGENT_SERVER
+#define GetCompositeClient(pClient) ((CompositeClientPtr) \
+    dixLookupPrivate(&(pClient)->devPrivates, CompositeClientPrivateKey))
+#else /* !defined(NXAGENT_SERVER) */
+#define GetCompositeClient(pClient) ((CompositeClientPtr) \
+    (pClient)->devPrivates[CompositeClientPrivIndex].ptr)
+#endif /* !edefined(NXAGENT_SERVER) */
 
 static void
 CompositeClientCallback (CallbackListPtr	*list,
@@ -57,22 +83,31 @@ static void
 CompositeResetProc (ExtensionEntry *extEntry)
 {
 }
+
+static int
+FreeCompositeClientWindow(void *value, XID ccwid)
+{
+    WindowPtr pWin = value;
+
+    compFreeClientWindow(pWin, ccwid);
+    return Success;
+}
     
 static int
-FreeCompositeClientWindow (void * value, XID ccwid)
+FreeCompositeClientSubwindows(void *value, XID ccwid)
 {
     WindowPtr	pWin = value;
 
-    compFreeClientWindow (pWin, ccwid);
+    compFreeClientSubwindows(pWin, ccwid);
     return Success;
 }
 
 static int
-FreeCompositeClientSubwindows (void * value, XID ccwid)
+FreeCompositeClientOverlay(void *value, XID ccwid)
 {
-    WindowPtr	pWin = value;
+    CompOverlayClientPtr pOc = (CompOverlayClientPtr) value;
 
-    compFreeClientSubwindows (pWin, ccwid);
+    compFreeOverlayClient(pOc);
     return Success;
 }
 
@@ -80,24 +115,22 @@ static int
 ProcCompositeQueryVersion (ClientPtr client)
 {
     CompositeClientPtr pCompositeClient = GetCompositeClient (client);
-    xCompositeQueryVersionReply rep;
+    xCompositeQueryVersionReply rep = {
+        .type = X_Reply,
+        .sequenceNumber = client->sequence,
+        .length = 0
+    };
     register int n;
+
     REQUEST(xCompositeQueryVersionReq);
 
     REQUEST_SIZE_MATCH(xCompositeQueryVersionReq);
-    rep.type = X_Reply;
-    rep.length = 0;
-    rep.sequenceNumber = client->sequence;
-    if (stuff->majorVersion < COMPOSITE_MAJOR) {
+    if (stuff->majorVersion < SERVER_COMPOSITE_MAJOR_VERSION) {
 	rep.majorVersion = stuff->majorVersion;
 	rep.minorVersion = stuff->minorVersion;
     } else {
-	rep.majorVersion = COMPOSITE_MAJOR;
-	if (stuff->majorVersion == COMPOSITE_MAJOR && 
-	    stuff->minorVersion < COMPOSITE_MINOR)
-	    rep.minorVersion = stuff->minorVersion;
-	else
-	    rep.minorVersion = COMPOSITE_MINOR;
+	rep.majorVersion = SERVER_COMPOSITE_MAJOR_VERSION;
+	rep.minorVersion = SERVER_COMPOSITE_MINOR_VERSION;
     }
     pCompositeClient->major_version = rep.majorVersion;
     pCompositeClient->minor_version = rep.minorVersion;
@@ -108,9 +141,23 @@ ProcCompositeQueryVersion (ClientPtr client)
 	swapl(&rep.minorVersion, n);
     }
     WriteToClient(client, sizeof(xCompositeQueryVersionReply), (char *)&rep);
-    return(client->noClientException);
+    return Success;
 }
 
+/* Unsupported by current architecture and porting is too much effort. */
+#if 0
+#define VERIFY_WINDOW(pWindow, wid, client, mode)			\
+    do {								\
+	int err;							\
+	err = dixLookupResourceByType((void **) &pWindow, wid,	\
+				      RT_WINDOW, client, mode);		\
+	if (err != Success) {						\
+	    client->errorValue = wid;					\
+	    return err;							\
+	}								\
+    } while (0)
+#endif /* 0 */
+
 static int
 ProcCompositeRedirectWindow (ClientPtr client)
 {
@@ -118,12 +165,18 @@ ProcCompositeRedirectWindow (ClientPtr client)
     REQUEST(xCompositeRedirectWindowReq);
 
     REQUEST_SIZE_MATCH(xCompositeRedirectWindowReq);
+    /* Unsupported by current architecture and porting is too much effort. */
+    /*
+    VERIFY_WINDOW(pWin, stuff->window, client,
+                  DixSetAttrAccess | DixManageAccess | DixBlendAccess);
+    */
     pWin = (WindowPtr) LookupIDByType (stuff->window, RT_WINDOW);
     if (!pWin)
     {
 	client->errorValue = stuff->window;
 	return BadWindow;
     }
+
     return compRedirectWindow (client, pWin, stuff->update);
 }
 
@@ -134,12 +187,18 @@ ProcCompositeRedirectSubwindows (ClientPtr client)
     REQUEST(xCompositeRedirectSubwindowsReq);
 
     REQUEST_SIZE_MATCH(xCompositeRedirectSubwindowsReq);
+    /* Unsupported by current architecture and porting is too much effort. */
+    /*
+    VERIFY_WINDOW(pWin, stuff->window, client,
+                  DixSetAttrAccess | DixManageAccess | DixBlendAccess);
+    */
     pWin = (WindowPtr) LookupIDByType (stuff->window, RT_WINDOW);
     if (!pWin)
     {
 	client->errorValue = stuff->window;
 	return BadWindow;
     }
+
     return compRedirectSubwindows (client, pWin, stuff->update);
 }
 
@@ -150,12 +209,18 @@ ProcCompositeUnredirectWindow (ClientPtr client)
     REQUEST(xCompositeUnredirectWindowReq);
 
     REQUEST_SIZE_MATCH(xCompositeUnredirectWindowReq);
+    /* Unsupported by current architecture and porting is too much effort. */
+    /*
+    VERIFY_WINDOW(pWin, stuff->window, client,
+                  DixSetAttrAccess | DixManageAccess | DixBlendAccess);
+    */
     pWin = (WindowPtr) LookupIDByType (stuff->window, RT_WINDOW);
     if (!pWin)
     {
 	client->errorValue = stuff->window;
 	return BadWindow;
     }
+
     return compUnredirectWindow (client, pWin, stuff->update);
 }
 
@@ -166,12 +231,18 @@ ProcCompositeUnredirectSubwindows (ClientPtr client)
     REQUEST(xCompositeUnredirectSubwindowsReq);
 
     REQUEST_SIZE_MATCH(xCompositeUnredirectSubwindowsReq);
+    /* Unsupported by current architecture and porting is too much effort. */
+    /*
+    VERIFY_WINDOW(pWin, stuff->window, client,
+                  DixSetAttrAccess | DixManageAccess | DixBlendAccess);
+    */
     pWin = (WindowPtr) LookupIDByType (stuff->window, RT_WINDOW);
     if (!pWin)
     {
 	client->errorValue = stuff->window;
 	return BadWindow;
     }
+
     return compUnredirectSubwindows (client, pWin, stuff->update);
 }
 
@@ -184,13 +255,16 @@ ProcCompositeCreateRegionFromBorderClip (ClientPtr client)
     REQUEST(xCompositeCreateRegionFromBorderClipReq);
 
     REQUEST_SIZE_MATCH(xCompositeCreateRegionFromBorderClipReq);
+    /* Unsupported by current architecture and porting is too much effort. */
+    /*
+    VERIFY_WINDOW(pWin, stuff->window, client, DixGetAttrAccess);
+    */
     pWin = (WindowPtr) LookupIDByType (stuff->window, RT_WINDOW);
     if (!pWin)
     {
 	client->errorValue = stuff->window;
 	return BadWindow;
     }
-    
     LEGAL_NEW_RESOURCE (stuff->region, client);
     
     cw = GetCompWindow (pWin);
@@ -206,7 +280,7 @@ ProcCompositeCreateRegionFromBorderClip (ClientPtr client)
     if (!AddResource (stuff->region, RegionResType, (void *) pRegion))
 	return BadAlloc;
 
-    return(client->noClientException);
+    return Success;
 }
 
 static int
@@ -215,35 +289,170 @@ ProcCompositeNameWindowPixmap (ClientPtr client)
     WindowPtr	    pWin;
     CompWindowPtr   cw;
     PixmapPtr	    pPixmap;
+    ScreenPtr pScreen;
+    int rc;
+
     REQUEST(xCompositeNameWindowPixmapReq);
 
     REQUEST_SIZE_MATCH(xCompositeNameWindowPixmapReq);
+    /* Unsupported by current architecture and porting is too much effort. */
+    /*
+    VERIFY_WINDOW(pWin, stuff->window, client, DixGetAttrAccess);
+    */
     pWin = (WindowPtr) LookupIDByType (stuff->window, RT_WINDOW);
     if (!pWin)
     {
 	client->errorValue = stuff->window;
 	return BadWindow;
     }
-    
+
+    pScreen = pWin->drawable.pScreen;
+
+    if (!pWin->viewable)
+        return BadMatch;
+
     LEGAL_NEW_RESOURCE (stuff->pixmap, client);
     
     cw = GetCompWindow (pWin);
     if (!cw)
 	return BadMatch;
 
-    pPixmap = (*pWin->drawable.pScreen->GetWindowPixmap) (pWin);
+    pPixmap = (*pScreen->GetWindowPixmap) (pWin);
     if (!pPixmap)
 	return BadMatch;
 
+    /* security creation/labeling check */
+    /*
+    rc = XaceHook(XACE_RESOURCE_ACCESS, client, stuff->pixmap, RT_PIXMAP,
+                  pPixmap, RT_WINDOW, pWin, DixCreateAccess);
+    */
+    rc = Success;
+    if (rc != Success)
+        return rc;
+
     ++pPixmap->refcnt;
     
     if (!AddResource (stuff->pixmap, RT_PIXMAP, (void *) pPixmap))
 	return BadAlloc;
 
-    return(client->noClientException);
+    /* Unsupported by current architecture. */
+    /*
+    if (pScreen->NameWindowPixmap) {
+        rc = pScreen->NameWindowPixmap(pWin, pPixmap, stuff->pixmap);
+        if (rc != Success) {
+            FreeResource(stuff->pixmap, RT_NONE);
+            return rc;
+        }
+    }
+    */
+
+    return Success;
+}
+
+static int
+ProcCompositeGetOverlayWindow(ClientPtr client)
+{
+    REQUEST(xCompositeGetOverlayWindowReq);
+    xCompositeGetOverlayWindowReply rep;
+    WindowPtr pWin;
+    ScreenPtr pScreen;
+    CompScreenPtr cs;
+    CompOverlayClientPtr pOc;
+    int rc;
+    int n = 0;
+
+    REQUEST_SIZE_MATCH(xCompositeGetOverlayWindowReq);
+    /* Unsupported by current architecture and porting is too much effort. */
+    /*
+    VERIFY_WINDOW(pWin, stuff->window, client, DixGetAttrAccess);
+    */
+    pWin = (WindowPtr) LookupIDByType (stuff->window, RT_WINDOW);
+    if (!pWin)
+    {
+	client->errorValue = stuff->window;
+	return BadWindow;
+    }
+    pScreen = pWin->drawable.pScreen;
+
+    /*
+     * Create an OverlayClient structure to mark this client's
+     * interest in the overlay window
+     */
+    pOc = compCreateOverlayClient(pScreen, client);
+    if (pOc == NULL)
+        return BadAlloc;
+
+    /*
+     * Make sure the overlay window exists
+     */
+    cs = GetCompScreen(pScreen);
+    if (cs->pOverlayWin == NULL)
+        if (!compCreateOverlayWindow(pScreen)) {
+            FreeResource(pOc->resource, RT_NONE);
+            return BadAlloc;
+        }
+
+    /*
+    rc = XaceHook(XACE_RESOURCE_ACCESS, client, cs->pOverlayWin->drawable.id,
+                  RT_WINDOW, cs->pOverlayWin, RT_NONE, NULL, DixGetAttrAccess);
+    */
+    rc = Success;
+    if (rc != Success) {
+        FreeResource(pOc->resource, RT_NONE);
+        return rc;
+    }
+
+    rep = (xCompositeGetOverlayWindowReply) {
+        .type = X_Reply,
+        .sequenceNumber = client->sequence,
+        .length = 0,
+        .overlayWin = cs->pOverlayWin->drawable.id
+    };
+
+    if (client->swapped) {
+        swaps(&rep.sequenceNumber, n);
+        swapl(&rep.length, n);
+        swapl(&rep.overlayWin, n);
+    }
+    WriteToClient(client, sz_xCompositeGetOverlayWindowReply, (char *)&rep);
+
+    return Success;
 }
 
-int (*ProcCompositeVector[CompositeNumberRequests])(ClientPtr) = {
+static int
+ProcCompositeReleaseOverlayWindow(ClientPtr client)
+{
+    REQUEST(xCompositeReleaseOverlayWindowReq);
+    WindowPtr pWin;
+    CompOverlayClientPtr pOc;
+
+    REQUEST_SIZE_MATCH(xCompositeReleaseOverlayWindowReq);
+    /* Unsupported by current architecture and porting is too much effort. */
+    /*
+    VERIFY_WINDOW(pWin, stuff->window, client, DixGetAttrAccess);
+    */
+    pWin = (WindowPtr) LookupIDByType (stuff->window, RT_WINDOW);
+    if (!pWin)
+    {
+	client->errorValue = stuff->window;
+	return BadWindow;
+    }
+
+    /*
+     * Has client queried a reference to the overlay window
+     * on this screen? If not, generate an error.
+     */
+    pOc = compFindOverlayClient(pWin->drawable.pScreen, client);
+    if (pOc == NULL)
+        return BadMatch;
+
+    /* The delete function will free the client structure */
+    FreeResource(pOc->resource, RT_NONE);
+
+    return Success;
+}
+
+static int (*ProcCompositeVector[CompositeNumberRequests])(ClientPtr) = {
     ProcCompositeQueryVersion,
     ProcCompositeRedirectWindow,
     ProcCompositeRedirectSubwindows,
@@ -251,6 +460,7 @@ int (*ProcCompositeVector[CompositeNumberRequests])(ClientPtr) = {
     ProcCompositeUnredirectSubwindows,
     ProcCompositeCreateRegionFromBorderClip,
     ProcCompositeNameWindowPixmap,
+    ProcCompositeGetOverlayWindow, ProcCompositeReleaseOverlayWindow,
 };
 
 static int
@@ -351,7 +561,31 @@ SProcCompositeNameWindowPixmap (ClientPtr client)
     return (*ProcCompositeVector[stuff->compositeReqType]) (client);
 }
 
-int (*SProcCompositeVector[CompositeNumberRequests])(ClientPtr) = {
+static int
+SProcCompositeGetOverlayWindow(ClientPtr client)
+{
+    int n = 0;
+    REQUEST(xCompositeGetOverlayWindowReq);
+
+    swaps(&stuff->length, n);
+    REQUEST_SIZE_MATCH(xCompositeGetOverlayWindowReq);
+    swapl(&stuff->window, n);
+    return (*ProcCompositeVector[stuff->compositeReqType]) (client);
+}
+
+static int
+SProcCompositeReleaseOverlayWindow(ClientPtr client)
+{
+    int n = 0;
+    REQUEST(xCompositeReleaseOverlayWindowReq);
+
+    swaps(&stuff->length, n);
+    REQUEST_SIZE_MATCH(xCompositeReleaseOverlayWindowReq);
+    swapl(&stuff->window, n);
+    return (*ProcCompositeVector[stuff->compositeReqType]) (client);
+}
+
+static int (*SProcCompositeVector[CompositeNumberRequests])(ClientPtr) = {
     SProcCompositeQueryVersion,
     SProcCompositeRedirectWindow,
     SProcCompositeRedirectSubwindows,
@@ -359,6 +593,7 @@ int (*SProcCompositeVector[CompositeNumberRequests])(ClientPtr) = {
     SProcCompositeUnredirectSubwindows,
     SProcCompositeCreateRegionFromBorderClip,
     SProcCompositeNameWindowPixmap,
+    SProcCompositeGetOverlayWindow, SProcCompositeReleaseOverlayWindow,
 };
 
 static int
@@ -372,27 +607,104 @@ SProcCompositeDispatch (ClientPtr client)
 	return BadRequest;
 }
 
+/* Both unused and incompatible due to architecture, disabled. */
+#if 0
+/** @see GetDefaultBytes */
+static void
+GetCompositeClientWindowBytes(void *value, XID id, ResourceSizePtr size)
+{
+    WindowPtr window = value;
+
+    /* Currently only pixmap bytes are reported to clients. */
+    size->resourceSize = 0;
+
+    /* Calculate pixmap reference sizes. */
+    size->pixmapRefSize = 0;
+    if (window->redirectDraw != RedirectDrawNone)
+    {
+        SizeType pixmapSizeFunc = GetResourceTypeSizeFunc(RT_PIXMAP);
+        ResourceSizeRec pixmapSize = { 0, 0 };
+        ScreenPtr screen = window->drawable.pScreen;
+        PixmapPtr pixmap = screen->GetWindowPixmap(window);
+        pixmapSizeFunc(pixmap, pixmap->drawable.id, &pixmapSize);
+        size->pixmapRefSize += pixmapSize.pixmapRefSize;
+    }
+}
+#endif /* 0 */
+
 void
 CompositeExtensionInit (void)
 {
     ExtensionEntry  *extEntry;
     int		    s;
 
+    /* Assume initialization is going to fail */
+    noCompositeExtension = TRUE;
+
+    fprintf(stderr, "COMPOSITE: trying to initialize extension.\n");
+
+    for (s = 0; s < screenInfo.numScreens; s++) {
+        ScreenPtr pScreen = screenInfo.screens[s];
+        VisualPtr vis;
+
+        /* Composite on 8bpp pseudocolor root windows appears to fail, so
+         * just disable it on anything pseudocolor for safety.
+         */
+        for (vis = pScreen->visuals; vis->vid != pScreen->rootVisual; vis++);
+        if ((vis->class | DynamicClass) == PseudoColor)
+            return;
+
+        /* Ensure that Render is initialized, which is required for automatic
+         * compositing.
+         */
+        if (GetPictureScreenIfSet(pScreen) == NULL)
+            return;
+    }
+#ifdef PANORAMIX
+    /* Xinerama's rewriting of window drawing before Composite gets to it
+     * breaks Composite.
+     */
+    if (!noPanoramiXExtension)
+	return;
+#endif
+
     CompositeClientWindowType = CreateNewResourceType (FreeCompositeClientWindow);
     if (!CompositeClientWindowType)
 	return;
 
+    /* SetResourceTypeSizeFunc(CompositeClientWindowType,
+                            GetCompositeClientWindowBytes);
+     */
+
     CompositeClientSubwindowsType = CreateNewResourceType (FreeCompositeClientSubwindows);
     if (!CompositeClientSubwindowsType)
 	return;
 
-    CompositeClientPrivateIndex = AllocateClientPrivateIndex ();
-    if (!AllocateClientPrivate (CompositeClientPrivateIndex, 
+    CompositeClientOverlayType = CreateNewResourceType
+        (FreeCompositeClientOverlay);
+    if (!CompositeClientOverlayType)
+        return;
+
+#ifndef NXAGENT_SERVER
+    if (!dixRegisterPrivateKey(&CompositeClientPrivateKeyRec, PRIVATE_CLIENT,
 				sizeof (CompositeClientRec)))
 	return;
+#else /* !defined(NXAGENT_SERVER) */
+    if ((CompositeClientPrivIndex = AllocateClientPrivateIndex()) < 0)
+        return;
+    if (!AllocateClientPrivate(CompositeClientPrivIndex, sizeof (CompositeClientRec)))
+        return;
+#endif /* !defined(NXAGENT_SERVER) */
+
     if (!AddCallback (&ClientStateCallback, CompositeClientCallback, 0))
 	return;
 
+    for (s = 0; s < screenInfo.numScreens; s++)
+	if (!compScreenInit (screenInfo.screens[s])) {
+            fprintf (stderr, "COMPOSITE: could not initialize via compScreenInit() for screen %d\n", s);
+	    return;
+        }
+
     extEntry = AddExtension (COMPOSITE_NAME, 0, 0,
 			     ProcCompositeDispatch, SProcCompositeDispatch,
 			     CompositeResetProc, StandardMinorOpcode);
@@ -400,10 +712,371 @@ CompositeExtensionInit (void)
 	return;
     CompositeReqCode = (CARD8) extEntry->base;
 
-    
-    for (s = 0; s < screenInfo.numScreens; s++)
-	if (!compScreenInit (screenInfo.screens[s]))
-	    return;
-    miRegisterRedirectBorderClipProc (compSetRedirectBorderClip,
-				      compGetRedirectBorderClip);
+    /* Initialization succeeded */
+    noCompositeExtension = FALSE;
+}
+
+/*
+ * This code requires features the current infrastructure does not provide
+ * and will thus be disabled.
+ */
+#if 0
+
+#ifdef PANORAMIX
+#include "panoramiXsrv.h"
+
+int (*PanoramiXSaveCompositeVector[CompositeNumberRequests]) (ClientPtr);
+
+static int
+PanoramiXCompositeRedirectWindow(ClientPtr client)
+{
+    PanoramiXRes *win;
+    int rc = 0, j;
+
+    REQUEST(xCompositeRedirectWindowReq);
+
+    REQUEST_SIZE_MATCH(xCompositeRedirectWindowReq);
+
+    if ((rc = dixLookupResourceByType((void **) &win, stuff->window, XRT_WINDOW,
+                                      client, DixUnknownAccess))) {
+        client->errorValue = stuff->window;
+        return rc;
+    }
+
+    FOR_NSCREENS_FORWARD(j) {
+        stuff->window = win->info[j].id;
+        rc = (*PanoramiXSaveCompositeVector[stuff->compositeReqType]) (client);
+        if (rc != Success)
+            break;
+    }
+
+    return rc;
+}
+
+static int
+PanoramiXCompositeRedirectSubwindows(ClientPtr client)
+{
+    PanoramiXRes *win;
+    int rc = 0, j;
+
+    REQUEST(xCompositeRedirectSubwindowsReq);
+
+    REQUEST_SIZE_MATCH(xCompositeRedirectSubwindowsReq);
+
+    if ((rc = dixLookupResourceByType((void **) &win, stuff->window, XRT_WINDOW,
+                                      client, DixUnknownAccess))) {
+        client->errorValue = stuff->window;
+        return rc;
+    }
+
+    FOR_NSCREENS_FORWARD(j) {
+        stuff->window = win->info[j].id;
+        rc = (*PanoramiXSaveCompositeVector[stuff->compositeReqType]) (client);
+        if (rc != Success)
+            break;
+    }
+
+    return rc;
+}
+
+static int
+PanoramiXCompositeUnredirectWindow(ClientPtr client)
+{
+    PanoramiXRes *win;
+    int rc = 0, j;
+
+    REQUEST(xCompositeUnredirectWindowReq);
+
+    REQUEST_SIZE_MATCH(xCompositeUnredirectWindowReq);
+
+    if ((rc = dixLookupResourceByType((void **) &win, stuff->window, XRT_WINDOW,
+                                      client, DixUnknownAccess))) {
+        client->errorValue = stuff->window;
+        return rc;
+    }
+
+    FOR_NSCREENS_FORWARD(j) {
+        stuff->window = win->info[j].id;
+        rc = (*PanoramiXSaveCompositeVector[stuff->compositeReqType]) (client);
+        if (rc != Success)
+            break;
+    }
+
+    return rc;
+}
+
+static int
+PanoramiXCompositeUnredirectSubwindows(ClientPtr client)
+{
+    PanoramiXRes *win;
+    int rc = 0, j;
+
+    REQUEST(xCompositeUnredirectSubwindowsReq);
+
+    REQUEST_SIZE_MATCH(xCompositeUnredirectSubwindowsReq);
+
+    if ((rc = dixLookupResourceByType((void **) &win, stuff->window, XRT_WINDOW,
+                                      client, DixUnknownAccess))) {
+        client->errorValue = stuff->window;
+        return rc;
+    }
+
+    FOR_NSCREENS_FORWARD(j) {
+        stuff->window = win->info[j].id;
+        rc = (*PanoramiXSaveCompositeVector[stuff->compositeReqType]) (client);
+        if (rc != Success)
+            break;
+    }
+
+    return rc;
 }
+
+static int
+PanoramiXCompositeNameWindowPixmap(ClientPtr client)
+{
+    WindowPtr pWin;
+    CompWindowPtr cw;
+    PixmapPtr pPixmap;
+    int rc;
+    PanoramiXRes *win, *newPix;
+    int i;
+
+    REQUEST(xCompositeNameWindowPixmapReq);
+
+    REQUEST_SIZE_MATCH(xCompositeNameWindowPixmapReq);
+
+    if ((rc = dixLookupResourceByType((void **) &win, stuff->window, XRT_WINDOW,
+                                      client, DixUnknownAccess))) {
+        client->errorValue = stuff->window;
+        return rc;
+    }
+
+    LEGAL_NEW_RESOURCE(stuff->pixmap, client);
+
+    if (!(newPix = malloc(sizeof(PanoramiXRes))))
+        return BadAlloc;
+
+    newPix->type = XRT_PIXMAP;
+    newPix->u.pix.shared = FALSE;
+    panoramix_setup_ids(newPix, client, stuff->pixmap);
+
+    FOR_NSCREENS(i) {
+        rc = dixLookupResourceByType((void **) &pWin, win->info[i].id,
+                                     RT_WINDOW, client, DixGetAttrAccess);
+        if (rc != Success) {
+            client->errorValue = stuff->window;
+            free(newPix);
+            return rc;
+        }
+
+        if (!pWin->viewable) {
+            free(newPix);
+            return BadMatch;
+        }
+
+        cw = GetCompWindow(pWin);
+        if (!cw) {
+            free(newPix);
+            return BadMatch;
+        }
+
+        pPixmap = (*pWin->drawable.pScreen->GetWindowPixmap) (pWin);
+        if (!pPixmap) {
+            free(newPix);
+            return BadMatch;
+        }
+
+        if (!AddResource(newPix->info[i].id, RT_PIXMAP, (void *) pPixmap))
+            return BadAlloc;
+
+        ++pPixmap->refcnt;
+    }
+
+    if (!AddResource(stuff->pixmap, XRT_PIXMAP, (void *) newPix))
+        return BadAlloc;
+
+    return Success;
+}
+
+static int
+PanoramiXCompositeGetOverlayWindow(ClientPtr client)
+{
+    REQUEST(xCompositeGetOverlayWindowReq);
+    xCompositeGetOverlayWindowReply rep;
+    WindowPtr pWin;
+    ScreenPtr pScreen;
+    CompScreenPtr cs;
+    CompOverlayClientPtr pOc;
+    int rc;
+    PanoramiXRes *win, *overlayWin = NULL;
+    int i;
+    int n = 0;
+
+    REQUEST_SIZE_MATCH(xCompositeGetOverlayWindowReq);
+
+    if ((rc = dixLookupResourceByType((void **) &win, stuff->window, XRT_WINDOW,
+                                      client, DixUnknownAccess))) {
+        client->errorValue = stuff->window;
+        return rc;
+    }
+
+    cs = GetCompScreen(screenInfo.screens[0]);
+    if (!cs->pOverlayWin) {
+        if (!(overlayWin = malloc(sizeof(PanoramiXRes))))
+            return BadAlloc;
+
+        overlayWin->type = XRT_WINDOW;
+        overlayWin->u.win.root = FALSE;
+    }
+
+    FOR_NSCREENS_BACKWARD(i) {
+        rc = dixLookupResourceByType((void **) &pWin, win->info[i].id,
+                                     RT_WINDOW, client, DixGetAttrAccess);
+        if (rc != Success) {
+            client->errorValue = stuff->window;
+            free(overlayWin);
+            return rc;
+        }
+        pScreen = pWin->drawable.pScreen;
+
+        /*
+         * Create an OverlayClient structure to mark this client's
+         * interest in the overlay window
+         */
+        pOc = compCreateOverlayClient(pScreen, client);
+        if (pOc == NULL) {
+            free(overlayWin);
+            return BadAlloc;
+        }
+
+        /*
+         * Make sure the overlay window exists
+         */
+        cs = GetCompScreen(pScreen);
+        if (cs->pOverlayWin == NULL)
+            if (!compCreateOverlayWindow(pScreen)) {
+                FreeResource(pOc->resource, RT_NONE);
+                free(overlayWin);
+                return BadAlloc;
+            }
+
+        /*
+        rc = XaceHook(XACE_RESOURCE_ACCESS, client,
+                      cs->pOverlayWin->drawable.id,
+                      RT_WINDOW, cs->pOverlayWin, RT_NONE, NULL,
+                      DixGetAttrAccess);
+        */
+        rc = Success;
+        if (rc != Success) {
+            FreeResource(pOc->resource, RT_NONE);
+            free(overlayWin);
+            return rc;
+        }
+    }
+
+    if (overlayWin) {
+        FOR_NSCREENS(i) {
+            cs = GetCompScreen(screenInfo.screens[i]);
+            overlayWin->info[i].id = cs->pOverlayWin->drawable.id;
+        }
+
+        AddResource(overlayWin->info[0].id, XRT_WINDOW, overlayWin);
+    }
+
+    cs = GetCompScreen(screenInfo.screens[0]);
+
+    rep = (xCompositeGetOverlayWindowReply) {
+        .type = X_Reply,
+        .sequenceNumber = client->sequence,
+        .length = 0,
+        .overlayWin = cs->pOverlayWin->drawable.id
+    };
+
+    if (client->swapped) {
+        swaps(&rep.sequenceNumber, n);
+        swapl(&rep.length, n);
+        swapl(&rep.overlayWin, n);
+    }
+    WriteToClient(client, sz_xCompositeGetOverlayWindowReply, &rep);
+
+    return Success;
+}
+
+static int
+PanoramiXCompositeReleaseOverlayWindow(ClientPtr client)
+{
+    REQUEST(xCompositeReleaseOverlayWindowReq);
+    WindowPtr pWin;
+    CompOverlayClientPtr pOc;
+    PanoramiXRes *win;
+    int i, rc;
+
+    REQUEST_SIZE_MATCH(xCompositeReleaseOverlayWindowReq);
+
+    if ((rc = dixLookupResourceByType((void **) &win, stuff->window, XRT_WINDOW,
+                                      client, DixUnknownAccess))) {
+        client->errorValue = stuff->window;
+        return rc;
+    }
+
+    FOR_NSCREENS_BACKWARD(i) {
+        if ((rc = dixLookupResourceByType((void **) &pWin, win->info[i].id,
+                                          XRT_WINDOW, client,
+                                          DixUnknownAccess))) {
+            client->errorValue = stuff->window;
+            return rc;
+        }
+
+        /*
+         * Has client queried a reference to the overlay window
+         * on this screen? If not, generate an error.
+         */
+        pOc = compFindOverlayClient(pWin->drawable.pScreen, client);
+        if (pOc == NULL)
+            return BadMatch;
+
+        /* The delete function will free the client structure */
+        FreeResource(pOc->resource, RT_NONE);
+    }
+
+    return Success;
+}
+
+void
+PanoramiXCompositeInit(void)
+{
+    int i;
+
+    for (i = 0; i < CompositeNumberRequests; i++)
+        PanoramiXSaveCompositeVector[i] = ProcCompositeVector[i];
+    /*
+     * Stuff in Xinerama aware request processing hooks
+     */
+    ProcCompositeVector[X_CompositeRedirectWindow] =
+        PanoramiXCompositeRedirectWindow;
+    ProcCompositeVector[X_CompositeRedirectSubwindows] =
+        PanoramiXCompositeRedirectSubwindows;
+    ProcCompositeVector[X_CompositeUnredirectWindow] =
+        PanoramiXCompositeUnredirectWindow;
+    ProcCompositeVector[X_CompositeUnredirectSubwindows] =
+        PanoramiXCompositeUnredirectSubwindows;
+    ProcCompositeVector[X_CompositeNameWindowPixmap] =
+        PanoramiXCompositeNameWindowPixmap;
+    ProcCompositeVector[X_CompositeGetOverlayWindow] =
+        PanoramiXCompositeGetOverlayWindow;
+    ProcCompositeVector[X_CompositeReleaseOverlayWindow] =
+        PanoramiXCompositeReleaseOverlayWindow;
+}
+
+void
+PanoramiXCompositeReset(void)
+{
+    int i;
+
+    for (i = 0; i < CompositeNumberRequests; i++)
+        ProcCompositeVector[i] = PanoramiXSaveCompositeVector[i];
+}
+
+#endif
+
+#endif /* 0 */
diff --git a/nx-X11/programs/Xserver/composite/compinit.c b/nx-X11/programs/Xserver/composite/compinit.c
index 13a6d6c01..c86aaed5a 100644
--- a/nx-X11/programs/Xserver/composite/compinit.c
+++ b/nx-X11/programs/Xserver/composite/compinit.c
@@ -27,11 +27,17 @@
 #endif
 
 #include "compint.h"
-
-int	CompScreenPrivateIndex;
-int	CompWindowPrivateIndex;
-int	CompSubwindowsPrivateIndex;
-int	CompGeneration;
+#include "compositeext.h"
+
+#ifndef NXAGENT_SERVER
+DevPrivateKeyRec CompScreenPrivateKeyRec;
+DevPrivateKeyRec CompWindowPrivateKeyRec;
+DevPrivateKeyRec CompSubwindowsPrivateKeyRec;
+#else /* !defined(NXAGENT_SERVER) */
+int CompScreenPrivIndex = -1;
+int CompWindowPrivIndex = -1;
+int CompSubwindowsPrivIndex = -1;
+#endif
 
 static Bool
 compCloseScreen (int index, ScreenPtr pScreen)
@@ -39,24 +45,39 @@ compCloseScreen (int index, ScreenPtr pScreen)
     CompScreenPtr   cs = GetCompScreen (pScreen);
     Bool	    ret;
 
+    free(cs->alternateVisuals);
+
     pScreen->CloseScreen = cs->CloseScreen;
-    pScreen->BlockHandler = cs->BlockHandler;
     pScreen->InstallColormap = cs->InstallColormap;
+    pScreen->ChangeWindowAttributes = cs->ChangeWindowAttributes;
     pScreen->ReparentWindow = cs->ReparentWindow;
+
+    /*
+     * Unsupported by our old Xserver infrastructure, replaced with direct calls to
+     * compReallocPixmap().
+     */
+    /*
+    pScreen->ConfigNotify = cs->ConfigNotify;
+    */
+
     pScreen->MoveWindow = cs->MoveWindow;
     pScreen->ResizeWindow = cs->ResizeWindow;
     pScreen->ChangeBorderWidth = cs->ChangeBorderWidth;
     
     pScreen->ClipNotify = cs->ClipNotify;
-    pScreen->PaintWindowBackground = cs->PaintWindowBackground;
     pScreen->UnrealizeWindow = cs->UnrealizeWindow;
     pScreen->RealizeWindow = cs->RealizeWindow;
     pScreen->DestroyWindow = cs->DestroyWindow;
     pScreen->CreateWindow = cs->CreateWindow;
     pScreen->CopyWindow = cs->CopyWindow;
     pScreen->PositionWindow = cs->PositionWindow;
+
+    pScreen->GetImage = cs->GetImage;
+    pScreen->GetSpans = cs->GetSpans;
+    pScreen->SourceValidate = cs->SourceValidate;
+
     xfree (cs);
-    pScreen->devPrivates[CompScreenPrivateIndex].ptr = 0;
+    FAKE_DIX_SET_SCREEN_PRIVATE(pScreen, NULL);
     ret = (*pScreen->CloseScreen) (index, pScreen);
     return ret;
 }
@@ -69,7 +90,7 @@ compInstallColormap (ColormapPtr pColormap)
     CompScreenPtr   cs = GetCompScreen (pScreen);
     int		    a;
 
-    for (a = 0; a < NUM_COMP_ALTERNATE_VISUALS; a++)
+    for (a = 0; a < cs->numAlternateVisuals; a++)
 	if (pVisual->vid == cs->alternateVisuals[a])
 	    return;
     pScreen->InstallColormap = cs->InstallColormap;
@@ -78,33 +99,91 @@ compInstallColormap (ColormapPtr pColormap)
     pScreen->InstallColormap = compInstallColormap;
 }
 
+/* Unsupported by current architecture, drop for now. */
+#if 0
 static void
-compScreenUpdate (ScreenPtr pScreen)
+compCheckBackingStore(WindowPtr pWin)
 {
-    CompScreenPtr   cs = GetCompScreen (pScreen);
-
-    compCheckTree (pScreen);
-    if (cs->damaged)
-    {
-	compWindowUpdate (WindowTable[pScreen->myNum]);
-	cs->damaged = FALSE;
+    if (pWin->backingStore != NotUseful && !pWin->backStorage) {
+        compRedirectWindow(serverClient, pWin, CompositeRedirectAutomatic);
+        pWin->backStorage = TRUE;
+    }
+    else if (pWin->backingStore == NotUseful && pWin->backStorage) {
+        compUnredirectWindow(serverClient, pWin,
+                             CompositeRedirectAutomatic);
+        pWin->backStorage = FALSE;
     }
 }
 
+/* Fake backing store via automatic redirection */
+static Bool
+compChangeWindowAttributes(WindowPtr pWin, unsigned long mask)
+{
+    ScreenPtr pScreen = pWin->drawable.pScreen;
+    CompScreenPtr cs = GetCompScreen(pScreen);
+    Bool ret;
+
+    pScreen->ChangeWindowAttributes = cs->ChangeWindowAttributes;
+    ret = pScreen->ChangeWindowAttributes(pWin, mask);
+
+    if (ret && (mask & CWBackingStore) &&
+        pScreen->backingStoreSupport != NotUseful)
+        compCheckBackingStore(pWin);
+
+    pScreen->ChangeWindowAttributes = compChangeWindowAttributes;
+
+    return ret;
+}
+#endif /* 0 */
+
 static void
-compBlockHandler (int	    i,
-		  void      *blockData,
-		  void      *pTimeout,
-		  void      *pReadmask)
+compGetImage(DrawablePtr pDrawable,
+             int sx, int sy,
+             int w, int h,
+             unsigned int format, unsigned long planemask, char *pdstLine)
 {
-    ScreenPtr	    pScreen = screenInfo.screens[i];
-    CompScreenPtr   cs = GetCompScreen (pScreen);
+    ScreenPtr pScreen = pDrawable->pScreen;
+    CompScreenPtr cs = GetCompScreen(pScreen);
+
+    pScreen->GetImage = cs->GetImage;
+    if (pDrawable->type == DRAWABLE_WINDOW)
+        compPaintChildrenToWindow(pScreen, (WindowPtr) pDrawable);
+    (*pScreen->GetImage) (pDrawable, sx, sy, w, h, format, planemask, pdstLine);
+    cs->GetImage = pScreen->GetImage;
+    pScreen->GetImage = compGetImage;
+}
+
+static void
+compGetSpans(DrawablePtr pDrawable, int wMax, DDXPointPtr ppt, int *pwidth,
+             int nspans, char *pdstStart)
+{
+    ScreenPtr pScreen = pDrawable->pScreen;
+    CompScreenPtr cs = GetCompScreen(pScreen);
+
+    pScreen->GetSpans = cs->GetSpans;
+    if (pDrawable->type == DRAWABLE_WINDOW)
+        compPaintChildrenToWindow(pScreen, (WindowPtr) pDrawable);
+    (*pScreen->GetSpans) (pDrawable, wMax, ppt, pwidth, nspans, pdstStart);
+    cs->GetSpans = pScreen->GetSpans;
+    pScreen->GetSpans = compGetSpans;
+}
 
-    pScreen->BlockHandler = cs->BlockHandler;
-    compScreenUpdate (pScreen);
-    (*pScreen->BlockHandler) (i, blockData, pTimeout, pReadmask);
-    cs->BlockHandler = pScreen->BlockHandler;
-    pScreen->BlockHandler = compBlockHandler;
+static void
+compSourceValidate(DrawablePtr pDrawable,
+                   int x, int y,
+                   int width, int height /* , unsigned int subWindowMode */ /* unsupported */)
+{
+    ScreenPtr pScreen = pDrawable->pScreen;
+    CompScreenPtr cs = GetCompScreen(pScreen);
+
+    pScreen->SourceValidate = cs->SourceValidate;
+    if (pDrawable->type == DRAWABLE_WINDOW /* && subWindowMode == IncludeInferiors */ /* unsupported */)
+        compPaintChildrenToWindow(pScreen, (WindowPtr) pDrawable);
+    if (pScreen->SourceValidate)
+        (*pScreen->SourceValidate) (pDrawable, x, y, width, height /*,
+                                    subWindowMode */ /* unsupported */);
+    cs->SourceValidate = pScreen->SourceValidate;
+    pScreen->SourceValidate = compSourceValidate;
 }
 
 /*
@@ -139,192 +218,190 @@ compFindVisuallessDepth (ScreenPtr pScreen, int d)
     return 0;
 }
 
+/*
+ * Add a list of visual IDs to the list of visuals to implicitly redirect.
+ */
+static Bool
+compRegisterAlternateVisuals(CompScreenPtr cs, VisualID * vids, int nVisuals)
+{
+    VisualID *p;
+
+#ifndef NXAGENT_SERVER
+    p = reallocarray(cs->alternateVisuals,
+                     cs->numAlternateVisuals + nVisuals, sizeof(VisualID));
+#else
+    p = xrealloc(cs->alternateVisuals,
+		 sizeof(VisualID) * (cs->numAlternateVisuals + nVisuals));
+#endif
+    if (p == NULL)
+        return FALSE;
+
+    memcpy(&p[cs->numAlternateVisuals], vids, sizeof(VisualID) * nVisuals);
+
+    cs->alternateVisuals = p;
+    cs->numAlternateVisuals += nVisuals;
+
+    return TRUE;
+}
+
+Bool
+CompositeRegisterAlternateVisuals(ScreenPtr pScreen, VisualID * vids,
+                                  int nVisuals)
+{
+    CompScreenPtr cs = GetCompScreen(pScreen);
+
+    return compRegisterAlternateVisuals(cs, vids, nVisuals);
+}
+
+Bool
+CompositeRegisterImplicitRedirectionException(ScreenPtr pScreen,
+                                              VisualID parentVisual,
+                                              VisualID winVisual)
+{
+    CompScreenPtr cs = GetCompScreen(pScreen);
+    CompImplicitRedirectException *p;
+
+#ifndef NXAGENT_SERVER
+    p = reallocarray(cs->implicitRedirectExceptions,
+                     cs->numImplicitRedirectExceptions + 1, sizeof(p[0]));
+#else
+    p = xrealloc(cs->implicitRedirectExceptions,
+                 sizeof(p[0]) * (cs->numImplicitRedirectExceptions + 1));
+#endif
+    if (p == NULL)
+        return FALSE;
+
+    p[cs->numImplicitRedirectExceptions].parentVisual = parentVisual;
+    p[cs->numImplicitRedirectExceptions].winVisual = winVisual;
+
+    cs->implicitRedirectExceptions = p;
+    cs->numImplicitRedirectExceptions++;
+
+    return TRUE;
+}
+
 typedef struct _alternateVisual {
     int		depth;
     CARD32	format;
 } CompAlternateVisual;
 
-static CompAlternateVisual  altVisuals[NUM_COMP_ALTERNATE_VISUALS] = {
+static CompAlternateVisual  altVisuals[] = {
 #if COMP_INCLUDE_RGB24_VISUAL
     {	24,	PICT_r8g8b8 },
 #endif
     {	32,	PICT_a8r8g8b8 },
 };
 
+static const int NUM_COMP_ALTERNATE_VISUALS = sizeof(altVisuals) /
+    sizeof(CompAlternateVisual);
+
 static Bool
-compAddAlternateVisuals (ScreenPtr pScreen, CompScreenPtr cs)
+compAddAlternateVisual (ScreenPtr pScreen, CompScreenPtr cs,
+                        CompAlternateVisual * alt)
 {
-    VisualPtr	    visuals;
-    DepthPtr	    depths[NUM_COMP_ALTERNATE_VISUALS];
-    PictFormatPtr   pPictFormats[NUM_COMP_ALTERNATE_VISUALS];
-    int		    i;
-    int		    numVisuals;
-    VisualID	    *vids[NUM_COMP_ALTERNATE_VISUALS];
-    XID		    *installedCmaps;
-    ColormapPtr	    installedCmap;
-    int		    numInstalledCmaps;
-    int		    numAlternate = 0;
-    int		    alt;
-    
-    memset (cs->alternateVisuals, '\0', sizeof (cs->alternateVisuals));
-
-    for (alt = 0; alt < NUM_COMP_ALTERNATE_VISUALS; alt++)
-    {
-	DepthPtr	depth;
-	PictFormatPtr   pPictFormat;
-	
-	depth = compFindVisuallessDepth (pScreen, altVisuals[alt].depth);
-	if (!depth)
-	    continue;
-	/*
-	 * Find the right picture format
-	 */
-	pPictFormat = PictureMatchFormat (pScreen, altVisuals[alt].depth,
-					  altVisuals[alt].format);
-	if (!pPictFormat)
-	    continue;
+    VisualPtr	    visual;
+    DepthPtr	depth;
+    PictFormatPtr   pPictFormat;
+    unsigned long alphaMask;
 
-	/*
-	 * Allocate vid list for this depth
-	 */
-	vids[numAlternate] = xalloc (sizeof (VisualID));
-	if (!vids[numAlternate])
-	    continue;
-	depths[numAlternate] = depth;
-	pPictFormats[numAlternate] = pPictFormat;
-	numAlternate++;
-    }
+    /*
+     * The ARGB32 visual is always available.  Other alternate depth visuals
+     * are only provided if their depth is less than the root window depth.
+     * There's no deep reason for this.
+     */
+    if (alt->depth >= pScreen->rootDepth && alt->depth != 32)
+        return FALSE;
     
-    if (!numAlternate)
+    depth = compFindVisuallessDepth(pScreen, alt->depth);
+    if (!depth)
+        /* alt->depth doesn't exist or already has alternate visuals. */
 	return TRUE;
 
-    /*
-     * Find the installed colormaps
-     */
-    installedCmaps = xalloc (pScreen->maxInstalledCmaps * sizeof (XID));
-    if (!installedCmaps)
-    {
-	for (alt = 0; alt < numAlternate; alt++)
-	    xfree (vids[alt]);
+    pPictFormat = PictureMatchFormat(pScreen, alt->depth, alt->format);
+    if (!pPictFormat)
 	return FALSE;
-    }
-    numInstalledCmaps = (*pScreen->ListInstalledColormaps) (pScreen, 
-							    installedCmaps);
     
-    /*
-     * realloc the visual array to fit the new one in place
-     */
-    numVisuals = pScreen->numVisuals;
-    visuals = xrealloc (pScreen->visuals,
-			(numVisuals + numAlternate) * sizeof (VisualRec));
-    if (!visuals)
-    {
-	for (alt = 0; alt < numAlternate; alt++)
-	    xfree (vids[alt]);
-	xfree (installedCmaps);
+    if (ResizeVisualArray(pScreen, 1, depth) == FALSE) {
 	return FALSE;
     }
     
-    /*
-     * Fix up any existing installed colormaps -- we'll assume that
-     * the only ones created so far have been installed.  If this
-     * isn't true, we'll have to walk the resource database looking
-     * for all colormaps.
-     */
-    for (i = 0; i < numInstalledCmaps; i++)
-    {
-	int j;
-	
-	installedCmap = LookupIDByType (installedCmaps[i], RT_COLORMAP);
-	if (!installedCmap)
-	    continue;
-	j = installedCmap->pVisual - pScreen->visuals;
-	installedCmap->pVisual = &visuals[j];
-    }
-
-    xfree (installedCmaps);
-
-    pScreen->visuals = visuals;
-    pScreen->numVisuals = numVisuals + numAlternate;
+    visual = pScreen->visuals + (pScreen->numVisuals - 1);      /* the new one */
 
-    for (alt = 0; alt < numAlternate; alt++)
-    {
-	DepthPtr	depth = depths[alt];
-	PictFormatPtr	pPictFormat = pPictFormats[alt];
-	VisualPtr	visual = &visuals[numVisuals + alt];
-	unsigned long	alphaMask;
-
-	/*
-	 * Initialize the visual
-	 */
-	visual->class = TrueColor;
+    /* Initialize the visual */
 	visual->bitsPerRGBValue = 8;
-
-	visual->vid = FakeClientID (0);
-	visual->redMask   = (((unsigned long) pPictFormat->direct.redMask) << 
-			     pPictFormat->direct.red);
-	visual->greenMask = (((unsigned long) pPictFormat->direct.greenMask) << 
-			     pPictFormat->direct.green);
-	visual->blueMask  = (((unsigned long) pPictFormat->direct.blueMask) << 
-			     pPictFormat->direct.blue);
-	alphaMask =  (((unsigned long) pPictFormat->direct.alphaMask) << 
-		      pPictFormat->direct.alpha);
-	visual->offsetRed   = pPictFormat->direct.red;
-	visual->offsetGreen = pPictFormat->direct.green;
-	visual->offsetBlue  = pPictFormat->direct.blue;
+    if (PICT_FORMAT_TYPE(alt->format) == PICT_TYPE_COLOR) {
+        visual->class = PseudoColor;
+        visual->nplanes = PICT_FORMAT_BPP(alt->format);
+        visual->ColormapEntries = 1 << visual->nplanes;
+    }
+    else {
+        DirectFormatRec *direct = &pPictFormat->direct;
+
+        visual->class = TrueColor;
+        visual->redMask = ((unsigned long) direct->redMask) << direct->red;
+        visual->greenMask =
+            ((unsigned long) direct->greenMask) << direct->green;
+        visual->blueMask = ((unsigned long) direct->blueMask) << direct->blue;
+        alphaMask = ((unsigned long) direct->alphaMask) << direct->alpha;
+        visual->offsetRed = direct->red;
+        visual->offsetGreen = direct->green;
+        visual->offsetBlue = direct->blue;
 	/*
 	 * Include A bits in this (unlike GLX which includes only RGB)
 	 * This lets DIX compute suitable masks for colormap allocations
 	 */
-	visual->nplanes = Ones (visual->redMask |
+        visual->nplanes = Ones(visual->redMask |
 				visual->greenMask |
-				visual->blueMask |
-				alphaMask);
-	/*
-	 * find widest component
-	 */
-	visual->ColormapEntries = (1 << max (Ones (visual->redMask),
-					     max (Ones (visual->greenMask),
-						  Ones (visual->blueMask))));
+                               visual->blueMask | alphaMask);
+        /* find widest component */
+        visual->ColormapEntries = (1 << max(Ones(visual->redMask),
+                                            max(Ones(visual->greenMask),
+                                                Ones(visual->blueMask))));
+    }
 
-	/*
-	 * remember the visual ID to detect auto-update windows
-	 */
-	cs->alternateVisuals[alt] = visual->vid;
+    /* remember the visual ID to detect auto-update windows */
+    compRegisterAlternateVisuals(cs, &visual->vid, 1);
 	
-	/*
-	 * Fix up the depth
-	 */
-	vids[alt][0] = visual->vid;
-	depth->numVids = 1;
-	depth->vids = vids[alt];
-    }
     return TRUE;
 }
 
+static Bool
+compAddAlternateVisuals(ScreenPtr pScreen, CompScreenPtr cs)
+{
+    int alt, ret = 0;
+
+    for (alt = 0; alt < NUM_COMP_ALTERNATE_VISUALS; alt++)
+        ret |= compAddAlternateVisual(pScreen, cs, altVisuals + alt);
+
+    return ! !ret;
+}
+
 Bool
 compScreenInit (ScreenPtr pScreen)
 {
     CompScreenPtr   cs;
 
-    if (CompGeneration != serverGeneration)
-    {
-	CompScreenPrivateIndex = AllocateScreenPrivateIndex ();
-	if (CompScreenPrivateIndex == -1)
-	    return FALSE;
-	CompWindowPrivateIndex = AllocateWindowPrivateIndex ();
-	if (CompWindowPrivateIndex == -1)
-	    return FALSE;
-	CompSubwindowsPrivateIndex = AllocateWindowPrivateIndex ();
-	if (CompSubwindowsPrivateIndex == -1)
+#ifndef NXAGENT_SERVER
+    if (!dixRegisterPrivateKey(&CompScreenPrivateKeyRec, PRIVATE_SCREEN, 0))
 	    return FALSE;
-	CompGeneration = serverGeneration;
-    }
-    if (!AllocateWindowPrivate (pScreen, CompWindowPrivateIndex, 0))
+    if (!dixRegisterPrivateKey(&CompWindowPrivateKeyRec, PRIVATE_WINDOW, 0))
+	return FALSE;
+    if (!dixRegisterPrivateKey(&CompSubwindowsPrivateKeyRec, PRIVATE_WINDOW, 0))
+	return FALSE;
+#else /* !defined(NXAGENT_SERVER) */
+    if ((CompScreenPrivIndex = AllocateScreenPrivateIndex()) < 0)
+        return FALSE;
+    if ((CompWindowPrivIndex = AllocateWindowPrivateIndex()) < 0)
+        return FALSE;
+    if ((CompSubwindowsPrivIndex = AllocateWindowPrivateIndex()) < 0)
+        return FALSE;
+
+    if (!AllocateWindowPrivate (pScreen, CompWindowPrivIndex, 0))
 	return FALSE;
 
-    if (!AllocateWindowPrivate (pScreen, CompSubwindowsPrivateIndex, 0))
+    if (!AllocateWindowPrivate (pScreen, CompSubwindowsPrivIndex, 0))
 	return FALSE;
+#endif
 
     if (GetCompScreen (pScreen))
 	return TRUE;
@@ -334,12 +411,24 @@ compScreenInit (ScreenPtr pScreen)
 
     cs->damaged = FALSE;
 
+    cs->overlayWid = FakeClientID(0);
+    cs->pOverlayWin = NULL;
+    cs->pOverlayClients = NULL;
+
+    cs->numAlternateVisuals = 0;
+    cs->alternateVisuals = NULL;
+    cs->numImplicitRedirectExceptions = 0;
+    cs->implicitRedirectExceptions = NULL;
+
     if (!compAddAlternateVisuals (pScreen, cs))
     {
 	xfree (cs);
 	return FALSE;
     }
 
+    if (!disableBackingStore)
+        pScreen->backingStoreSupport = WhenMapped;
+
     cs->PositionWindow = pScreen->PositionWindow;
     pScreen->PositionWindow = compPositionWindow;
 
@@ -358,12 +447,18 @@ compScreenInit (ScreenPtr pScreen)
     cs->UnrealizeWindow = pScreen->UnrealizeWindow;
     pScreen->UnrealizeWindow = compUnrealizeWindow;
 
-    cs->PaintWindowBackground = pScreen->PaintWindowBackground;
-    pScreen->PaintWindowBackground = compPaintWindowBackground;
-
     cs->ClipNotify = pScreen->ClipNotify;
     pScreen->ClipNotify = compClipNotify;
 
+    /*
+     * Unsupported by our old Xserver infrastructure, replaced with direct calls to
+     * compReallocPixmap().
+     */
+    /*
+    cs->ConfigNotify = pScreen->ConfigNotify;
+    pScreen->ConfigNotify = compConfigNotify;
+    */
+
     cs->MoveWindow = pScreen->MoveWindow;
     pScreen->MoveWindow = compMoveWindow;
 
@@ -379,12 +474,29 @@ compScreenInit (ScreenPtr pScreen)
     cs->InstallColormap = pScreen->InstallColormap;
     pScreen->InstallColormap = compInstallColormap;
 
-    cs->BlockHandler = pScreen->BlockHandler;
-    pScreen->BlockHandler = compBlockHandler;
+    /* Unsupported by our current architecture, drop for now. */
+    /*
+    cs->ChangeWindowAttributes = pScreen->ChangeWindowAttributes;
+    pScreen->ChangeWindowAttributes = compChangeWindowAttributes;
+    */
+
+    cs->BlockHandler = NULL;
 
     cs->CloseScreen = pScreen->CloseScreen;
     pScreen->CloseScreen = compCloseScreen;
 
-    pScreen->devPrivates[CompScreenPrivateIndex].ptr = (void *) cs;
+    cs->GetImage = pScreen->GetImage;
+    pScreen->GetImage = compGetImage;
+
+    cs->GetSpans = pScreen->GetSpans;
+    pScreen->GetSpans = compGetSpans;
+
+    cs->SourceValidate = pScreen->SourceValidate;
+    pScreen->SourceValidate = compSourceValidate;
+
+    FAKE_DIX_SET_SCREEN_PRIVATE(pScreen, cs);
+
+    RegisterRealChildHeadProc(CompositeRealChildHead);
+
     return TRUE;
 }
diff --git a/nx-X11/programs/Xserver/composite/compint.h b/nx-X11/programs/Xserver/composite/compint.h
index 262d95108..2834dad4e 100644
--- a/nx-X11/programs/Xserver/composite/compint.h
+++ b/nx-X11/programs/Xserver/composite/compint.h
@@ -51,6 +51,7 @@
 #include "damageextint.h"
 #include "xfixes.h"
 #include <nx-X11/extensions/compositeproto.h>
+#include "compositeext.h"
 #include <assert.h>
 
 /*
@@ -58,6 +59,7 @@
  
     #define COMPOSITE_DEBUG
  */
+#define COMPOSITE_DEBUG
 
 typedef struct _CompClientWindow {
     struct _CompClientWindow	*next;
@@ -89,11 +91,19 @@ typedef struct _CompSubwindows {
 #define COMP_INCLUDE_RGB24_VISUAL 0
 #endif
 
-#if COMP_INCLUDE_RGB24_VISUAL
-#define NUM_COMP_ALTERNATE_VISUALS  2
-#else
-#define NUM_COMP_ALTERNATE_VISUALS  1
-#endif
+typedef struct _CompOverlayClientRec *CompOverlayClientPtr;
+
+typedef struct _CompOverlayClientRec {
+    CompOverlayClientPtr pNext;
+    ClientPtr pClient;
+    ScreenPtr pScreen;
+    XID resource;
+} CompOverlayClientRec;
+
+typedef struct _CompImplicitRedirectException {
+    XID parentVisual;
+    XID winVisual;
+} CompImplicitRedirectException;
 
 typedef struct _CompScreen {
     PositionWindowProcPtr	PositionWindow;
@@ -102,13 +112,21 @@ typedef struct _CompScreen {
     DestroyWindowProcPtr	DestroyWindow;
     RealizeWindowProcPtr	RealizeWindow;
     UnrealizeWindowProcPtr	UnrealizeWindow;
-    PaintWindowProcPtr		PaintWindowBackground;
     ClipNotifyProcPtr		ClipNotify;
     /*
      * Called from ConfigureWindow, these
      * three track changes to the offscreen storage
      * geometry
      */
+
+    /*
+     * Unsupported by our old Xserver infrastructure, replaced with direct calls to
+     * compReallocPixmap().
+     */
+    /*
+    ConfigNotifyProcPtr ConfigNotify;
+    */
+
     MoveWindowProcPtr		MoveWindow;
     ResizeWindowProcPtr		ResizeWindow;
     ChangeBorderWidthProcPtr	ChangeBorderWidth;
@@ -122,30 +140,79 @@ typedef struct _CompScreen {
      */
     InstallColormapProcPtr	InstallColormap;
 
+    /*
+     * Fake backing store via automatic redirection
+     */
+    ChangeWindowAttributesProcPtr ChangeWindowAttributes;
+
     ScreenBlockHandlerProcPtr	BlockHandler;
     CloseScreenProcPtr		CloseScreen;
-    Bool			damaged;
-    XID				alternateVisuals[NUM_COMP_ALTERNATE_VISUALS];
+    Bool		        damaged;
+    int numAlternateVisuals;
+    VisualID *alternateVisuals;
+    int numImplicitRedirectExceptions;
+    CompImplicitRedirectException *implicitRedirectExceptions;
+
+    WindowPtr pOverlayWin;
+    Window overlayWid;
+    CompOverlayClientPtr pOverlayClients;
+
+    GetImageProcPtr GetImage;
+    GetSpansProcPtr GetSpans;
+    SourceValidateProcPtr SourceValidate;
 } CompScreenRec, *CompScreenPtr;
 
-extern int  CompScreenPrivateIndex;
-extern int  CompWindowPrivateIndex;
-extern int  CompSubwindowsPrivateIndex;
+#ifndef NXAGENT_SERVER
+extern DevPrivateKeyRec CompScreenPrivateKeyRec;
 
-#define GetCompScreen(s) ((CompScreenPtr) ((s)->devPrivates[CompScreenPrivateIndex].ptr))
-#define GetCompWindow(w) ((CompWindowPtr) ((w)->devPrivates[CompWindowPrivateIndex].ptr))
-#define GetCompSubwindows(w) ((CompSubwindowsPtr) ((w)->devPrivates[CompSubwindowsPrivateIndex].ptr))
+#define CompScreenPrivateKey (&CompScreenPrivateKeyRec)
+
+extern DevPrivateKeyRec CompWindowPrivateKeyRec;
+
+#define CompWindowPrivateKey (&CompWindowPrivateKeyRec)
+
+extern DevPrivateKeyRec CompSubwindowsPrivateKeyRec;
+
+#define CompSubwindowsPrivateKey (&CompSubwindowsPrivateKeyRec)
+
+#define GetCompScreen(s) ((CompScreenPtr) \
+    dixLookupPrivate(&(s)->devPrivates, CompScreenPrivateKey))
+#define GetCompWindow(w) ((CompWindowPtr) \
+    dixLookupPrivate(&(w)->devPrivates, CompWindowPrivateKey))
+#define GetCompSubwindows(w) ((CompSubwindowsPtr) \
+    dixLookupPrivate(&(w)->devPrivates, CompSubwindowsPrivateKey))
+#else /* !defined(NXAGENT_SERVER) */
+extern int CompScreenPrivIndex;
+extern int CompWindowPrivIndex;
+extern int CompSubwindowsPrivIndex;
+
+#define GetCompScreen(s) ((CompScreenPtr) (s)->devPrivates[CompScreenPrivIndex].ptr)
+#define GetCompWindow(w) ((CompWindowPtr) (w)->devPrivates[CompWindowPrivIndex].ptr)
+#define GetCompSubwindows(w) ((CompSubwindowsPtr) (w)->devPrivates[CompSubwindowsPrivIndex].ptr)
+#endif /* !defined(NXAGENT_SERVER) */
 
-extern RESTYPE		CompositeClientWindowType;
 extern RESTYPE		CompositeClientSubwindowsType;
+extern RESTYPE CompositeClientOverlayType;
+
+/* Shim for less ifdefs within the actual code. */
+#ifndef NXAGENT_SERVER
+#define FAKE_DIX_SET_PRIVATE_IMPL(obj, privateKey, ptr_val) do { dixSetPrivate(&(obj)->devPrivates, privateKey, ptr_val); } while (0)
+
+#define FAKE_DIX_SET_SCREEN_PRIVATE(pScreen, ptr_val) FAKE_DIX_SET_PRIVATE_IMPL(pScreen, CompScreenPrivateKey, ptr_val)
+#define FAKE_DIX_SET_WINDOW_PRIVATE(pWin, ptr_val) FAKE_DIX_SET_PRIVATE_IMPL(pWin, CompWindowPrivateKey, ptr_val)
+#define FAKE_DIX_SET_SUBWINDOWS_PRIVATE(pWin, ptr_val) FAKE_DIX_SET_PRIVATE_IMPL(pWin, CompSubwindowsPrivateKey, ptr_val)
+#else /* !defined(NXAGENT_SERVER) */
+#define FAKE_DIX_SET_PRIVATE_IMPL(obj, privIndex, ptr_val) do { (obj)->devPrivates[privIndex].ptr = (void *) (ptr_val); } while (0)
+
+#define FAKE_DIX_SET_SCREEN_PRIVATE(pScreen, ptr_val) FAKE_DIX_SET_PRIVATE_IMPL(pScreen, CompScreenPrivIndex, ptr_val)
+#define FAKE_DIX_SET_WINDOW_PRIVATE(pWin, ptr_val) FAKE_DIX_SET_PRIVATE_IMPL(pWin, CompWindowPrivIndex, ptr_val)
+#define FAKE_DIX_SET_SUBWINDOWS_PRIVATE(pWin, ptr_val) FAKE_DIX_SET_PRIVATE_IMPL(pWin, CompSubwindowsPrivIndex, ptr_val)
+#endif /* !defined(NXAGENT_SERVER) */
 
 /*
  * compalloc.c
  */
 
-void
-compReportDamage (DamagePtr pDamage, RegionPtr pRegion, void *closure);
-
 Bool
 compRedirectWindow (ClientPtr pClient, WindowPtr pWin, int update);
 
@@ -174,25 +241,40 @@ Bool
 compAllocPixmap (WindowPtr pWin);
 
 void
-compFreePixmap (WindowPtr pWin);
+ compSetParentPixmap(WindowPtr pWin);
+
+void
+ compRestoreWindow(WindowPtr pWin, PixmapPtr pPixmap);
 
 Bool
 compReallocPixmap (WindowPtr pWin, int x, int y,
 		   unsigned int w, unsigned int h, int bw);
 
 /*
- * compext.c
+ * compinit.c
  */
 
-void
-CompositeExtensionInit (void);
+Bool
+ compScreenInit(ScreenPtr pScreen);
 
 /*
- * compinit.c
+ * compoverlay.c
  */
 
+void
+ compFreeOverlayClient(CompOverlayClientPtr pOcToDel);
+
+CompOverlayClientPtr
+compFindOverlayClient(ScreenPtr pScreen, ClientPtr pClient);
+
+CompOverlayClientPtr
+compCreateOverlayClient(ScreenPtr pScreen, ClientPtr pClient);
+
 Bool
-compScreenInit (ScreenPtr pScreen);
+ compCreateOverlayWindow(ScreenPtr pScreen);
+
+void
+ compDestroyOverlayWindow(ScreenPtr pScreen);
 
 /*
  * compwindow.c
@@ -205,6 +287,9 @@ compCheckTree (ScreenPtr pScreen);
 #define compCheckTree(s)
 #endif
 
+PictFormatPtr
+compWindowFormat (WindowPtr pWin);
+
 void
 compSetPixmap (WindowPtr pWin, PixmapPtr pPixmap);
 
@@ -220,8 +305,6 @@ compRealizeWindow (WindowPtr pWin);
 Bool
 compUnrealizeWindow (WindowPtr pWin);
 
-void
-compPaintWindowBackground (WindowPtr pWin, RegionPtr pRegion, int what);
 
 void
 compClipNotify (WindowPtr pWin, int dx, int dy);
@@ -255,6 +338,25 @@ void
 compCopyWindow (WindowPtr pWin, DDXPointRec ptOldOrg, RegionPtr prgnSrc);
 
 void
-compWindowUpdate (WindowPtr pWin);
+ compPaintChildrenToWindow(ScreenPtr pScreen, WindowPtr pWin);
+
+WindowPtr
+ CompositeRealChildHead(WindowPtr pWin);
+
+int
+ DeleteWindowNoInputDevices(void *value, XID wid);
+
+/*
+ * Unsupported by our old Xserver infrastructure, replaced with direct calls to
+ * compReallocPixmap().
+ */
+/*
+int
+compConfigNotify(WindowPtr pWin, int x, int y, int w, int h,
+                 int bw, WindowPtr pSib);
+*/
+
+void PanoramiXCompositeInit(void);
+void PanoramiXCompositeReset(void);
 
 #endif /* _COMPINT_H_ */
diff --git a/nx-X11/programs/Xserver/composite/compositeext.h b/nx-X11/programs/Xserver/composite/compositeext.h
new file mode 100644
index 000000000..b96cb1d68
--- /dev/null
+++ b/nx-X11/programs/Xserver/composite/compositeext.h
@@ -0,0 +1,44 @@
+/*
+ * Copyright © 2009 NVIDIA Corporation
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the "Software"), to
+ * deal in the Software without restriction, including without limitation the
+ * rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
+ * sell copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice (including the next
+ * paragraph) 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
+ * AUTHORS OR COPYRIGHT HOLDERS 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.
+ */
+
+#ifdef HAVE_DIX_CONFIG_H
+#include <dix-config.h>
+#endif
+
+#ifndef _COMPOSITEEXT_H_
+#define _COMPOSITEEXT_H_
+
+#include "misc.h"
+#include "scrnintstr.h"
+
+extern _X_EXPORT Bool CompositeRegisterAlternateVisuals(ScreenPtr pScreen,
+                                                        VisualID * vids,
+                                                        int nVisuals);
+
+extern _X_EXPORT Bool CompositeRegisterImplicitRedirectionException(ScreenPtr pScreen,
+                                                                    VisualID parentVisual,
+                                                                    VisualID winVisual);
+
+extern _X_EXPORT RESTYPE CompositeClientWindowType;
+
+#endif                          /* _COMPOSITEEXT_H_ */
diff --git a/nx-X11/programs/Xserver/composite/compoverlay.c b/nx-X11/programs/Xserver/composite/compoverlay.c
new file mode 100644
index 000000000..dfe59f3cf
--- /dev/null
+++ b/nx-X11/programs/Xserver/composite/compoverlay.c
@@ -0,0 +1,178 @@
+/*
+ * Copyright (c) 2006, Oracle and/or its affiliates. All rights reserved.
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation
+ * the rights to use, copy, modify, merge, publish, distribute, sublicense,
+ * and/or sell copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice (including the next
+ * paragraph) 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 AUTHORS OR COPYRIGHT HOLDERS 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.
+ *
+ * Copyright © 2003 Keith Packard
+ *
+ * Permission to use, copy, modify, distribute, and sell this software and its
+ * documentation for any purpose is hereby granted without fee, provided that
+ * the above copyright notice appear in all copies and that both that
+ * copyright notice and this permission notice appear in supporting
+ * documentation, and that the name of Keith Packard not be used in
+ * advertising or publicity pertaining to distribution of the software without
+ * specific, written prior permission.  Keith Packard makes no
+ * representations about the suitability of this software for any purpose.  It
+ * is provided "as is" without express or implied warranty.
+ *
+ * KEITH PACKARD DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE,
+ * INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO
+ * EVENT SHALL KEITH PACKARD BE LIABLE FOR ANY SPECIAL, INDIRECT OR
+ * CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE,
+ * DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER
+ * TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
+ * PERFORMANCE OF THIS SOFTWARE.
+ */
+
+#ifdef HAVE_DIX_CONFIG_H
+#include <dix-config.h>
+#endif
+
+#include "compint.h"
+#ifndef NXAGENT_SERVER
+#include "xace.h"
+#endif
+
+#ifdef PANORAMIX
+#include "panoramiXsrv.h"
+#endif
+
+/*
+ * Delete the given overlay client list element from its screen list.
+ */
+void
+compFreeOverlayClient(CompOverlayClientPtr pOcToDel)
+{
+    ScreenPtr pScreen = pOcToDel->pScreen;
+    CompScreenPtr cs = GetCompScreen(pScreen);
+    CompOverlayClientPtr *pPrev, pOc;
+
+    for (pPrev = &cs->pOverlayClients; (pOc = *pPrev); pPrev = &pOc->pNext) {
+        if (pOc == pOcToDel) {
+            *pPrev = pOc->pNext;
+            free(pOc);
+            break;
+        }
+    }
+
+    /* Destroy overlay window when there are no more clients using it */
+    if (cs->pOverlayClients == NULL)
+        compDestroyOverlayWindow(pScreen);
+}
+
+/*
+ * Return the client's first overlay client rec from the given screen
+ */
+CompOverlayClientPtr
+compFindOverlayClient(ScreenPtr pScreen, ClientPtr pClient)
+{
+    CompScreenPtr cs = GetCompScreen(pScreen);
+    CompOverlayClientPtr pOc;
+
+    for (pOc = cs->pOverlayClients; pOc != NULL; pOc = pOc->pNext)
+        if (pOc->pClient == pClient)
+            return pOc;
+
+    return NULL;
+}
+
+/*
+ * Create an overlay client object for the given client
+ */
+CompOverlayClientPtr
+compCreateOverlayClient(ScreenPtr pScreen, ClientPtr pClient)
+{
+    CompScreenPtr cs = GetCompScreen(pScreen);
+    CompOverlayClientPtr pOc;
+
+    pOc = (CompOverlayClientPtr) malloc(sizeof(CompOverlayClientRec));
+    if (pOc == NULL)
+        return NULL;
+
+    pOc->pClient = pClient;
+    pOc->pScreen = pScreen;
+    pOc->resource = FakeClientID(pClient->index);
+    pOc->pNext = cs->pOverlayClients;
+    cs->pOverlayClients = pOc;
+
+    /*
+     * Create a resource for this element so it can be deleted
+     * when the client goes away.
+     */
+    if (!AddResource(pOc->resource, CompositeClientOverlayType, (void *) pOc))
+        return NULL;
+
+    return pOc;
+}
+
+/*
+ * Create the overlay window and map it
+ */
+Bool
+compCreateOverlayWindow(ScreenPtr pScreen)
+{
+    CompScreenPtr cs = GetCompScreen(pScreen);
+    WindowPtr pRoot = WindowTable[pScreen->myNum];
+    WindowPtr pWin;
+    XID attrs[] = { None, TRUE };       /* backPixmap, overrideRedirect */
+    int result;
+    int w = pScreen->width;
+    int h = pScreen->height;
+    int x = 0, y = 0;
+
+  /* Unsupported by current architecture, disabled. */
+#if 0
+#ifdef PANORAMIX
+    if (!noPanoramiXExtension) {
+        x = -pScreen->x;
+        y = -pScreen->y;
+        w = PanoramiXPixWidth;
+        h = PanoramiXPixHeight;
+    }
+#endif
+#endif
+
+    pWin = cs->pOverlayWin =
+        CreateWindow(cs->overlayWid, pRoot, x, y, w, h, 0,
+                     InputOutput, CWBackPixmap | CWOverrideRedirect, &attrs[0],
+                     pRoot->drawable.depth,
+                     serverClient, pScreen->rootVisual, &result);
+    if (pWin == NULL)
+        return FALSE;
+
+    if (!AddResource(pWin->drawable.id, RT_WINDOW, (void *) pWin))
+        return FALSE;
+
+    MapWindow(pWin, serverClient);
+
+    return TRUE;
+}
+
+/*
+ * Destroy the overlay window
+ */
+void
+compDestroyOverlayWindow(ScreenPtr pScreen)
+{
+    CompScreenPtr cs = GetCompScreen(pScreen);
+
+    cs->pOverlayWin = NullWindow;
+    FreeResource(cs->overlayWid, RT_NONE);
+}
diff --git a/nx-X11/programs/Xserver/composite/compwindow.c b/nx-X11/programs/Xserver/composite/compwindow.c
index fbdc44420..799aad023 100644
--- a/nx-X11/programs/Xserver/composite/compwindow.c
+++ b/nx-X11/programs/Xserver/composite/compwindow.c
@@ -28,6 +28,10 @@
 
 #include "compint.h"
 
+#ifdef PANORAMIX
+#include "panoramiXsrv.h"
+#endif
+
 #ifdef COMPOSITE_DEBUG
 static int
 compCheckWindow (WindowPtr pWin, void * data)
@@ -39,10 +43,10 @@ compCheckWindow (WindowPtr pWin, void * data)
     
     if (!pWin->parent)
     {
-	assert (!pWin->redirectDraw);
+	assert (pWin->redirectDraw == RedriectDrawNone);
 	assert (pWinPixmap == pScreenPixmap);
     }
-    else if (pWin->redirectDraw)
+    else if (pWin->redirectDraw != RedirectDrawNone)
     {
 	assert (pWinPixmap != pParentPixmap);
 	assert (pWinPixmap != pScreenPixmap);
@@ -73,15 +77,27 @@ typedef struct _compPixmapVisit {
 static Bool
 compRepaintBorder (ClientPtr pClient, void * closure)
 {
-    WindowPtr	pWindow = LookupWindow ((XID) closure, pClient);
+    WindowPtr	pWindow;
+#ifndef NXAGENT_SERVER
+    int rc =
+        dixLookupWindow(&pWindow, (XID) (intptr_t) closure, pClient,
+                        DixWriteAccess);
+#else
+    pWindow = SecurityLookupWindow((XID) (intptr_t) closure, pClient, SecurityWriteAccess);
+    int rc = pWindow ? Success : BadWindow;
+#endif
 
-    if (pWindow)
+    if (rc == Success)
     {
 	RegionRec exposed;
 
 	RegionNull(&exposed);
 	RegionSubtract(&exposed, &pWindow->borderClip, &pWindow->winSize);
+#ifndef NXAGENT_SERVER
+	pWindow->drawable.pScreen->PaintWindowBorder(pWindow, &exposed, PW_BORDER);
+#else
 	(*pWindow->drawable.pScreen->PaintWindowBorder)(pWindow, &exposed, PW_BORDER);
+#endif
 	RegionUninit(&exposed);
     }
     return TRUE;
@@ -93,7 +109,7 @@ compSetPixmapVisitWindow (WindowPtr pWindow, void * data)
     CompPixmapVisitPtr	pVisit = (CompPixmapVisitPtr) data;
     ScreenPtr		pScreen = pWindow->drawable.pScreen;
 
-    if (pWindow != pVisit->pWindow && pWindow->redirectDraw)
+    if (pWindow != pVisit->pWindow && pWindow->redirectDraw != RedirectDrawNone)
 	return WT_DONTWALKCHILDREN;
     (*pScreen->SetWindowPixmap) (pWindow, pVisit->pPixmap);
     /*
@@ -105,7 +121,7 @@ compSetPixmapVisitWindow (WindowPtr pWindow, void * data)
     SetBorderSize (pWindow);
     if (HasBorder (pWindow))
 	QueueWorkProc (compRepaintBorder, serverClient, 
-		       (void *) pWindow->drawable.id);
+		       (void *) (intptr_t) pWindow->drawable.id);
     return WT_WALKCHILDREN;
 }
 
@@ -124,21 +140,73 @@ Bool
 compCheckRedirect (WindowPtr pWin)
 {
     CompWindowPtr   cw = GetCompWindow (pWin);
+    CompScreenPtr cs = GetCompScreen(pWin->drawable.pScreen);
     Bool	    should;
 
     should = pWin->realized && (pWin->drawable.class != InputOnly) &&
-	     (cw != NULL);
+	     (cw != NULL) && (pWin->parent != NULL);
     
-    if (should != pWin->redirectDraw)
+    /* Never redirect the overlay window */
+    if (cs->pOverlayWin != NULL) {
+        if (pWin == cs->pOverlayWin) {
+            should = FALSE;
+        }
+    }
+
+    if (should != (pWin->redirectDraw != RedirectDrawNone))
     {
 	if (should)
 	    return compAllocPixmap (pWin);
+        else {
+            ScreenPtr pScreen = pWin->drawable.pScreen;
+            PixmapPtr pPixmap = (*pScreen->GetWindowPixmap) (pWin);
+
+            compSetParentPixmap(pWin);
+            compRestoreWindow(pWin, pPixmap);
+            (*pScreen->DestroyPixmap) (pPixmap);
+        }
+    }
+    else if (should) {
+        if (cw->update == CompositeRedirectAutomatic)
+            pWin->redirectDraw = RedirectDrawAutomatic;
 	else
-	    compFreePixmap (pWin);
+            pWin->redirectDraw = RedirectDrawManual;
     }
     return TRUE;
 }
 
+static int
+updateOverlayWindow(ScreenPtr pScreen)
+{
+    CompScreenPtr cs;
+    WindowPtr pWin;             /* overlay window */
+    XID vlist[2];
+    int w = pScreen->width;
+    int h = pScreen->height;
+
+#ifdef PANORAMIX
+    if (!noPanoramiXExtension) {
+        w = PanoramiXPixWidth;
+        h = PanoramiXPixHeight;
+    }
+#endif
+
+    cs = GetCompScreen(pScreen);
+    if ((pWin = cs->pOverlayWin) != NULL) {
+        if ((pWin->drawable.width == w) && (pWin->drawable.height == h))
+            return Success;
+
+        /* Let's resize the overlay window. */
+        vlist[0] = w;
+        vlist[1] = h;
+        return ConfigureWindow(pWin, CWWidth | CWHeight, vlist, wClient(pWin));
+    }
+
+    /* Let's be on the safe side and not assume an overlay window is
+       always allocated. */
+    return Success;
+}
+
 Bool
 compPositionWindow (WindowPtr pWin, int x, int y)
 {
@@ -153,10 +221,11 @@ compPositionWindow (WindowPtr pWin, int x, int y)
     compCheckRedirect (pWin);
      */
 #ifdef COMPOSITE_DEBUG
-    if (pWin->redirectDraw != (pWin->viewable && (GetCompWindow(pWin) != NULL)))
+    if ((pWin->redirectDraw != RedirectDrawNone) !=
+        (pWin->viewable && (GetCompWindow(pWin) != NULL)))
 	abort ();
 #endif
-    if (pWin->redirectDraw)
+    if (pWin->redirectDraw != RedirectDrawNone)
     {
 	PixmapPtr   pPixmap = (*pScreen->GetWindowPixmap) (pWin);
 	int	    bw = wBorderWidth (pWin);
@@ -176,6 +245,8 @@ compPositionWindow (WindowPtr pWin, int x, int y)
     cs->PositionWindow = pScreen->PositionWindow;
     pScreen->PositionWindow = compPositionWindow;
     compCheckTree (pWin->drawable.pScreen);
+    if (updateOverlayWindow(pScreen) != Success)
+        ret = FALSE;
     return ret;
 }
 
@@ -213,21 +284,6 @@ compUnrealizeWindow (WindowPtr pWin)
     return ret;
 }
 
-void
-compPaintWindowBackground (WindowPtr pWin, RegionPtr pRegion, int what)
-{
-    ScreenPtr		pScreen = pWin->drawable.pScreen;
-    CompSubwindowsPtr	csw = GetCompSubwindows (pWin);
-    CompScreenPtr	cs = GetCompScreen (pScreen);
-    
-    if (csw && csw->update == CompositeRedirectManual)
-	return;
-    pScreen->PaintWindowBackground = cs->PaintWindowBackground;
-    (*pScreen->PaintWindowBackground) (pWin, pRegion, what);
-    cs->PaintWindowBackground = pScreen->PaintWindowBackground;
-    pScreen->PaintWindowBackground = compPaintWindowBackground;
-}
-
 /*
  * Called after the borderClip for the window has settled down
  * We use this to make sure our extra borderClip has the right origin
@@ -273,13 +329,28 @@ compIsAlternateVisual (ScreenPtr    pScreen,
     CompScreenPtr	cs = GetCompScreen (pScreen);
     int			i;
 
-    for (i = 0; i < NUM_COMP_ALTERNATE_VISUALS; i++)
+    for (i = 0; i < cs->numAlternateVisuals; i++)
 	if (cs->alternateVisuals[i] == visual)
 	    return TRUE;
     return FALSE;
 }
 
 static Bool
+compIsImplicitRedirectException(ScreenPtr pScreen,
+                                XID parentVisual, XID winVisual)
+{
+    CompScreenPtr cs = GetCompScreen(pScreen);
+    int i;
+
+    for (i = 0; i < cs->numImplicitRedirectExceptions; i++)
+        if (cs->implicitRedirectExceptions[i].parentVisual == parentVisual &&
+            cs->implicitRedirectExceptions[i].winVisual == winVisual)
+            return TRUE;
+
+    return FALSE;
+}
+
+static Bool
 compImplicitRedirect (WindowPtr pWin, WindowPtr pParent)
 {
     if (pParent)
@@ -287,6 +358,9 @@ compImplicitRedirect (WindowPtr pWin, WindowPtr pParent)
 	ScreenPtr	pScreen = pWin->drawable.pScreen;
 	XID		winVisual = wVisual (pWin);
 	XID		parentVisual = wVisual (pParent);
+
+        if (compIsImplicitRedirectException(pScreen, parentVisual, winVisual))
+            return FALSE;
     
 	if (winVisual != parentVisual &&
 	    (compIsAlternateVisual (pScreen, winVisual) ||
@@ -296,6 +370,21 @@ compImplicitRedirect (WindowPtr pWin, WindowPtr pParent)
     return FALSE;
 }
 
+static void
+compFreeOldPixmap(WindowPtr pWin)
+{
+    ScreenPtr pScreen = pWin->drawable.pScreen;
+	
+    if (pWin->redirectDraw != RedirectDrawNone) {
+        CompWindowPtr cw = GetCompWindow(pWin);
+	
+        if (cw->pOldPixmap) {
+            (*pScreen->DestroyPixmap) (cw->pOldPixmap);
+            cw->pOldPixmap = NullPixmap;
+        }
+    }
+}
+
 void
 compMoveWindow (WindowPtr pWin, int x, int y, WindowPtr pSib, VTKind kind)
 {
@@ -303,8 +392,7 @@ compMoveWindow (WindowPtr pWin, int x, int y, WindowPtr pSib, VTKind kind)
     CompScreenPtr	cs = GetCompScreen (pScreen);
 
     compCheckTree (pScreen);
-    if (pWin->redirectDraw)
-    {
+    if (pWin->redirectDraw != RedirectDrawNone) {
 	WindowPtr		pParent;
 	int			draw_x, draw_y;
 	unsigned int		w, h, bw;
@@ -312,7 +400,7 @@ compMoveWindow (WindowPtr pWin, int x, int y, WindowPtr pSib, VTKind kind)
 	/* if this is a root window, can't be moved */
 	if (!(pParent = pWin->parent))
 	   return;
-	
+
 	bw = wBorderWidth (pWin);
 	draw_x = pParent->drawable.x + x + (int)bw;
 	draw_y = pParent->drawable.y + y + (int)bw;
@@ -327,16 +415,7 @@ compMoveWindow (WindowPtr pWin, int x, int y, WindowPtr pSib, VTKind kind)
     cs->MoveWindow = pScreen->MoveWindow;
     pScreen->MoveWindow = compMoveWindow;
 
-    if (pWin->redirectDraw)
-    {
-	CompWindowPtr	cw = GetCompWindow (pWin);
-	if (cw->pOldPixmap)
-	{
-	    (*pScreen->DestroyPixmap) (cw->pOldPixmap);
-	    cw->pOldPixmap = NullPixmap;
-	}
-    }
-
+    compFreeOldPixmap(pWin);
     compCheckTree (pScreen);
 }
 
@@ -348,12 +427,12 @@ compResizeWindow (WindowPtr pWin, int x, int y,
     CompScreenPtr	cs = GetCompScreen (pScreen);
 
     compCheckTree (pScreen);
-    if (pWin->redirectDraw)
+    if (pWin->redirectDraw != RedirectDrawNone)
     {
 	WindowPtr		pParent;
 	int			draw_x, draw_y;
 	unsigned int		bw;
-	
+
 	/* if this is a root window, can't be moved */
 	if (!(pParent = pWin->parent))
 	   return;
@@ -364,20 +443,13 @@ compResizeWindow (WindowPtr pWin, int x, int y,
 	compReallocPixmap (pWin, draw_x, draw_y, w, h, bw);
     }
     compCheckTree (pScreen);
-    
+
     pScreen->ResizeWindow = cs->ResizeWindow;
     (*pScreen->ResizeWindow) (pWin, x, y, w, h, pSib);
     cs->ResizeWindow = pScreen->ResizeWindow;
     pScreen->ResizeWindow = compResizeWindow;
-    if (pWin->redirectDraw)
-    {
-	CompWindowPtr	cw = GetCompWindow (pWin);
-	if (cw->pOldPixmap)
-	{
-	    (*pScreen->DestroyPixmap) (cw->pOldPixmap);
-	    cw->pOldPixmap = NullPixmap;
-	}
-    }
+
+    compFreeOldPixmap(pWin);
     compCheckTree (pWin->drawable.pScreen);
 }
 
@@ -388,37 +460,30 @@ compChangeBorderWidth (WindowPtr pWin, unsigned int bw)
     CompScreenPtr	cs = GetCompScreen (pScreen);
 
     compCheckTree (pScreen);
-    if (pWin->redirectDraw)
+    if (pWin->redirectDraw != RedirectDrawNone)
     {
 	WindowPtr		pParent;
 	int			draw_x, draw_y;
 	unsigned int		w, h;
-	
+
 	/* if this is a root window, can't be moved */
 	if (!(pParent = pWin->parent))
 	   return;
-	
+
 	draw_x = pWin->drawable.x;
 	draw_y = pWin->drawable.y;
 	w = pWin->drawable.width;
 	h = pWin->drawable.height;
 	compReallocPixmap (pWin, draw_x, draw_y, w, h, bw);
     }
-    compCheckTree (pScreen);
 
+    compCheckTree (pScreen);
     pScreen->ChangeBorderWidth = cs->ChangeBorderWidth;
     (*pScreen->ChangeBorderWidth) (pWin, bw);
     cs->ChangeBorderWidth = pScreen->ChangeBorderWidth;
     pScreen->ChangeBorderWidth = compChangeBorderWidth;
-    if (pWin->redirectDraw)
-    {
-	CompWindowPtr	cw = GetCompWindow (pWin);
-	if (cw->pOldPixmap)
-	{
-	    (*pScreen->DestroyPixmap) (cw->pOldPixmap);
-	    cw->pOldPixmap = NullPixmap;
-	}
-    }
+
+    compFreeOldPixmap(pWin);
     compCheckTree (pWin->drawable.pScreen);
 }
 
@@ -454,7 +519,7 @@ compReparentWindow (WindowPtr pWin, WindowPtr pPriorParent)
     /*
      * Reset pixmap pointers as appropriate
      */
-    if (pWin->parent && !pWin->redirectDraw)
+    if (pWin->parent && pWin->redirectDraw == RedirectDrawNone)
 	compSetPixmap (pWin, (*pScreen->GetWindowPixmap) (pWin->parent));
     /*
      * Call down to next function
@@ -473,7 +538,7 @@ compCopyWindow (WindowPtr pWin, DDXPointRec ptOldOrg, RegionPtr prgnSrc)
     CompScreenPtr   cs = GetCompScreen (pScreen);
     int		    dx = 0, dy = 0;
 
-    if (pWin->redirectDraw)
+    if (pWin->redirectDraw != RedirectDrawNone)
     {
 	PixmapPtr	pPixmap = (*pScreen->GetWindowPixmap) (pWin);
 	CompWindowPtr	cw = GetCompWindow (pWin);
@@ -487,7 +552,6 @@ compCopyWindow (WindowPtr pWin, DDXPointRec ptOldOrg, RegionPtr prgnSrc)
 	     * need to be copied to pNewPixmap.
 	     */
 	    RegionRec	rgnDst;
-	    PixmapPtr	pPixmap = (*pScreen->GetWindowPixmap) (pWin);
 	    GCPtr	pGC;
 	    
 	    dx = ptOldOrg.x - pWin->drawable.x;
@@ -524,6 +588,7 @@ compCopyWindow (WindowPtr pWin, DDXPointRec ptOldOrg, RegionPtr prgnSrc)
 		}
 		FreeScratchGC (pGC);
 	    }
+            RegionUninit (&rgnDst);
 	    return;
 	}
 	dx = pPixmap->screen_x - cw->oldx;
@@ -568,8 +633,11 @@ compCreateWindow (WindowPtr pWin)
     {
 	CompSubwindowsPtr	csw = GetCompSubwindows (pWin->parent);
         CompClientWindowPtr	ccw;
+        PixmapPtr parent_pixmap = (*pScreen->GetWindowPixmap)(pWin->parent);
+        PixmapPtr window_pixmap = (*pScreen->GetWindowPixmap)(pWin);
 
-	(*pScreen->SetWindowPixmap) (pWin, (*pScreen->GetWindowPixmap) (pWin->parent));
+        if (window_pixmap != parent_pixmap)
+	    (*pScreen->SetWindowPixmap) (pWin, parent_pixmap);
 	if (csw)
 	    for (ccw = csw->clients; ccw; ccw = ccw->next)
 		compRedirectWindow (clients[CLIENT_ID(ccw->id)],
@@ -598,8 +666,12 @@ compDestroyWindow (WindowPtr pWin)
     while ((csw = GetCompSubwindows (pWin)))
 	FreeResource (csw->clients->id, RT_NONE);
     
-    if (pWin->redirectDraw)
-	compFreePixmap (pWin);
+    if (pWin->redirectDraw != RedirectDrawNone) {
+        PixmapPtr pPixmap = (*pScreen->GetWindowPixmap) (pWin);
+
+	compSetParentPixmap (pWin);
+        (*pScreen->DestroyPixmap) (pPixmap);
+    }
     ret = (*pScreen->DestroyWindow) (pWin);
     cs->DestroyWindow = pScreen->DestroyWindow;
     pScreen->DestroyWindow = compDestroyWindow;
@@ -658,7 +730,7 @@ compGetWindowVisual (WindowPtr pWin)
     return 0;
 }
 
-static PictFormatPtr
+PictFormatPtr
 compWindowFormat (WindowPtr pWin)
 {
     ScreenPtr	pScreen = pWin->drawable.pScreen;
@@ -735,21 +807,103 @@ compWindowUpdateAutomatic (WindowPtr pWin)
     DamageEmpty (cw->damage);
 }
 
+static void
+compPaintWindowToParent(WindowPtr pWin)
+{
+    compPaintChildrenToWindow(pWin->drawable.pScreen, pWin);
+
+    if (pWin->redirectDraw != RedirectDrawNone) {
+        CompWindowPtr cw = GetCompWindow(pWin);
+
+        if (cw->damaged) {
+            compWindowUpdateAutomatic(pWin);
+            cw->damaged = FALSE;
+        }
+    }
+}
+
 void
-compWindowUpdate (WindowPtr pWin)
+compPaintChildrenToWindow(ScreenPtr pScreen, WindowPtr pWin)
 {
     WindowPtr	pChild;
+    CompScreenPtr cs = GetCompScreen(pScreen);
+
+    if (!cs->damaged)
+        return;
 
     for (pChild = pWin->lastChild; pChild; pChild = pChild->prevSib)
-	compWindowUpdate (pChild);
-    if (pWin->redirectDraw)
-    {
-	CompWindowPtr	cw = GetCompWindow(pWin);
+        compPaintWindowToParent(pChild);
 
-	if (cw->damaged)
-	{
-	    compWindowUpdateAutomatic (pWin);
-	    cw->damaged = FALSE;
+    cs->damaged = FALSE;
+}
+
+WindowPtr
+CompositeRealChildHead(WindowPtr pWin)
+{
+    WindowPtr pChild, pChildBefore;
+    CompScreenPtr cs;
+
+    if (!pWin->parent &&
+        (screenIsSaved == SCREEN_SAVER_ON) &&
+        (HasSaverWindow(pWin->drawable.pScreen->myNum))) {
+
+        /* First child is the screen saver; see if next child is the overlay */
+        pChildBefore = pWin->firstChild;
+        pChild = pChildBefore->nextSib;
+
+    }
+    else {
+        pChildBefore = NullWindow;
+        pChild = pWin->firstChild;
+    }
+
+    if (!pChild) {
+        return NullWindow;
+    }
+
+    cs = GetCompScreen(pWin->drawable.pScreen);
+    if (pChild == cs->pOverlayWin) {
+        return pChild;
+    }
+    else {
+        return pChildBefore;
 	}
+}
+
+/* ConfigNotify not implemented... replace with the old pixmap reallocation algorithm... */
+/*
+int
+compConfigNotify(WindowPtr pWin, int x, int y, int w, int h,
+                 int bw, WindowPtr pSib)
+{
+    ScreenPtr pScreen = pWin->drawable.pScreen;
+    CompScreenPtr cs = GetCompScreen(pScreen);
+    Bool ret = 0;
+    WindowPtr pParent = pWin->parent;
+    int draw_x, draw_y;
+    Bool alloc_ret;
+
+    if (cs->ConfigNotify) {
+        pScreen->ConfigNotify = cs->ConfigNotify;
+        ret = (*pScreen->ConfigNotify) (pWin, x, y, w, h, bw, pSib);
+        cs->ConfigNotify = pScreen->ConfigNotify;
+        pScreen->ConfigNotify = compConfigNotify;
+
+        if (ret)
+            return ret;
     }
+
+    if (pWin->redirectDraw == RedirectDrawNone)
+        return Success;
+
+    compCheckTree(pScreen);
+
+    draw_x = pParent->drawable.x + x + bw;
+    draw_y = pParent->drawable.y + y + bw;
+    alloc_ret = compReallocPixmap(pWin, draw_x, draw_y, w, h, bw);
+
+    if (alloc_ret == FALSE)
+        return BadAlloc;
+    return Success;
 }
+*/
diff --git a/nx-X11/programs/Xserver/dix/colormap.c b/nx-X11/programs/Xserver/dix/colormap.c
index 11a353f84..cd5e1dc49 100644
--- a/nx-X11/programs/Xserver/dix/colormap.c
+++ b/nx-X11/programs/Xserver/dix/colormap.c
@@ -2791,3 +2791,80 @@ IsMapInstalled(Colormap map, WindowPtr pWin)
     DEALLOCATE_LOCAL(pmaps);
     return (found);
 }
+
+struct colormap_lookup_data {
+    ScreenPtr pScreen;
+    VisualPtr visuals;
+};
+
+static void
+_colormap_find_resource(void *value, XID id, void *cdata)
+{
+    struct colormap_lookup_data *cmap_data = cdata;
+    VisualPtr visuals = cmap_data->visuals;
+    ScreenPtr pScreen = cmap_data->pScreen;
+    ColormapPtr cmap = value;
+    int j;
+
+    if (pScreen != cmap->pScreen)
+        return;
+
+    j = cmap->pVisual - pScreen->visuals;
+    cmap->pVisual = &visuals[j];
+}
+
+/* something has realloced the visuals, instead of breaking
+   ABI fix it up here - glx and compsite did this wrong */
+Bool
+ResizeVisualArray(ScreenPtr pScreen, int new_visual_count, DepthPtr depth)
+{
+    struct colormap_lookup_data cdata;
+    int numVisuals;
+    VisualPtr visuals;
+    XID *vids, vid;
+    int first_new_vid, first_new_visual, i;
+
+    first_new_vid = depth->numVids;
+    first_new_visual = pScreen->numVisuals;
+
+#if 0 /* !defined(NXAGENT_SERVER) */
+    vids = reallocarray(depth->vids, depth->numVids + new_visual_count,
+                        sizeof(XID));
+#else
+    vids = xrealloc(depth->vids, sizeof(XID) *
+                    (depth->numVids + new_visual_count));
+#endif
+    if (!vids)
+        return FALSE;
+
+    /* its realloced now no going back if we fail the next one */
+    depth->vids = vids;
+
+    numVisuals = pScreen->numVisuals + new_visual_count;
+#if 0 /* !defined(NXAGENT_SERVER) */
+    visuals = reallocarray(pScreen->visuals, numVisuals, sizeof(VisualRec));
+#else
+    visuals = xrealloc(pScreen->visuals, sizeof(VisualRec) * numVisuals);
+#endif
+    if (!visuals) {
+        return FALSE;
+    }
+
+    cdata.visuals = visuals;
+    cdata.pScreen = pScreen;
+    FindClientResourcesByType(serverClient, RT_COLORMAP,
+                              _colormap_find_resource, &cdata);
+
+    pScreen->visuals = visuals;
+
+    for (i = 0; i < new_visual_count; i++) {
+        vid = FakeClientID(0);
+        pScreen->visuals[first_new_visual + i].vid = vid;
+        vids[first_new_vid + i] = vid;
+    }
+
+    depth->numVids += new_visual_count;
+    pScreen->numVisuals += new_visual_count;
+
+    return TRUE;
+}
diff --git a/nx-X11/programs/Xserver/dix/window.c b/nx-X11/programs/Xserver/dix/window.c
index 916d7e276..c3d901fb9 100644
--- a/nx-X11/programs/Xserver/dix/window.c
+++ b/nx-X11/programs/Xserver/dix/window.c
@@ -535,9 +535,21 @@ ClippedRegionFromBox(register WindowPtr pWin, RegionPtr Rgn,
     RegionIntersect(Rgn, Rgn, &pWin->winSize);
 }
 
+static RealChildHeadProc realChildHeadProc = NULL;
+
+void
+RegisterRealChildHeadProc (RealChildHeadProc proc)
+{
+    realChildHeadProc = proc;
+}
+
 WindowPtr
 RealChildHead(register WindowPtr pWin)
 {
+    if (realChildHeadProc) {
+        return realChildHeadProc (pWin);
+    }
+
     if (!pWin->parent &&
 	(screenIsSaved == SCREEN_SAVER_ON) &&
 	(HasSaverWindow (pWin->drawable.pScreen->myNum)))
diff --git a/nx-X11/programs/Xserver/hw/nxagent/NXcompositeext.h b/nx-X11/programs/Xserver/hw/nxagent/NXcompositeext.h
index b4433d6c1..38ac87e9b 100644
--- a/nx-X11/programs/Xserver/hw/nxagent/NXcompositeext.h
+++ b/nx-X11/programs/Xserver/hw/nxagent/NXcompositeext.h
@@ -33,7 +33,7 @@
 
 #define COMPOSITE_NAME				"Composite"
 #define COMPOSITE_MAJOR				0
-#define COMPOSITE_MINOR				2
+#define COMPOSITE_MINOR				4
 
 #define CompositeRedirectAutomatic		0
 #define CompositeRedirectManual			1
@@ -45,7 +45,11 @@
 #define X_CompositeUnredirectSubwindows		4
 #define X_CompositeCreateRegionFromBorderClip	5
 #define X_CompositeNameWindowPixmap		6
+#define X_CompositeGetOverlayWindow             7
+#define X_CompositeReleaseOverlayWindow         8
 
-#define CompositeNumberRequests	    (X_CompositeNameWindowPixmap + 1)
+#define CompositeNumberRequests	    (X_CompositeReleaseOverlayWindow + 1)
+
+#define CompositeNumberEvents			0
 
 #endif /* _COMPOSITE_H_ */
diff --git a/nx-X11/programs/Xserver/hw/nxagent/NXpicture.c b/nx-X11/programs/Xserver/hw/nxagent/NXpicture.c
index 67cd5d6ed..5087fa493 100644
--- a/nx-X11/programs/Xserver/hw/nxagent/NXpicture.c
+++ b/nx-X11/programs/Xserver/hw/nxagent/NXpicture.c
@@ -1800,6 +1800,99 @@ FreePictFormat (void *	pPictFormat,
     return Success;
 }
 
+/**
+ * ReduceCompositeOp is used to choose simpler ops for cases where alpha
+ * channels are always one and so math on the alpha channel per pixel becomes
+ * unnecessary.  It may also avoid destination reads sometimes if apps aren't
+ * being careful to avoid these cases.
+ */
+static CARD8
+ReduceCompositeOp (CARD8 op, PicturePtr pSrc, PicturePtr pMask, PicturePtr pDst)
+{
+    Bool no_src_alpha, no_dst_alpha;
+
+    no_src_alpha = PICT_FORMAT_COLOR(pSrc->format) &&
+                   PICT_FORMAT_A(pSrc->format) == 0 &&
+                   pSrc->alphaMap == NULL &&
+                   pMask == NULL;
+    no_dst_alpha = PICT_FORMAT_COLOR(pDst->format) &&
+                   PICT_FORMAT_A(pDst->format) == 0 &&
+                   pDst->alphaMap == NULL;
+
+    /* TODO, maybe: Conjoint and Disjoint op reductions? */
+ 
+    /* Deal with simplifications where the source alpha is always 1. */
+    if (no_src_alpha)
+    {
+	switch (op) {
+	case PictOpOver:
+	    op = PictOpSrc;
+	    break;
+	case PictOpInReverse:
+	    op = PictOpDst;
+	    break;
+	case PictOpOutReverse:
+	    op = PictOpClear;
+	    break;
+	case PictOpAtop:
+	    op = PictOpIn;
+	    break;
+	case PictOpAtopReverse:
+	    op = PictOpOverReverse;
+	    break;
+	case PictOpXor:
+	    op = PictOpOut;
+	    break;
+	default:
+	    break;
+	}
+    }
+
+    /* Deal with simplifications when the destination alpha is always 1 */
+    if (no_dst_alpha)
+    {
+	switch (op) {
+	case PictOpOverReverse:
+	    op = PictOpDst;
+	    break;
+	case PictOpIn:
+	    op = PictOpSrc;
+	    break;
+	case PictOpOut:
+	    op = PictOpClear;
+	    break;
+	case PictOpAtop:
+	    op = PictOpOver;
+	    break;
+	case PictOpXor:
+	    op = PictOpOutReverse;
+	    break;
+	default:
+	    break;
+	}
+    }
+
+    /* Reduce some con/disjoint ops to the basic names. */
+    switch (op) {
+    case PictOpDisjointClear:
+    case PictOpConjointClear:
+	op = PictOpClear;
+	break;
+    case PictOpDisjointSrc:
+    case PictOpConjointSrc:
+	op = PictOpSrc;
+	break;
+    case PictOpDisjointDst:
+    case PictOpConjointDst:
+	op = PictOpDst;
+	break;
+    default:
+	break;
+    }
+
+    return op;
+}
+
 void
 CompositePicture (CARD8		op,
 		  PicturePtr	pSrc,
@@ -1820,6 +1913,11 @@ CompositePicture (CARD8		op,
     if (pMask)
 	ValidatePicture (pMask);
     ValidatePicture (pDst);
+
+    op = ReduceCompositeOp (op, pSrc, pMask, pDst);
+    if (op == PictOpDst)
+	return;
+
     (*ps->Composite) (op,
 		       pSrc,
 		       pMask,
diff --git a/nx-X11/programs/Xserver/hw/nxagent/NXwindow.c b/nx-X11/programs/Xserver/hw/nxagent/NXwindow.c
index b2da4e97c..70c378b9e 100644
--- a/nx-X11/programs/Xserver/hw/nxagent/NXwindow.c
+++ b/nx-X11/programs/Xserver/hw/nxagent/NXwindow.c
@@ -717,6 +717,14 @@ ClippedRegionFromBox(register WindowPtr pWin, RegionPtr Rgn,
     RegionIntersect(Rgn, Rgn, &pWin->winSize);
 }
 
+static RealChildHeadProc realChildHeadProc = NULL;
+
+void
+RegisterRealChildHeadProc (RealChildHeadProc proc)
+{
+    realChildHeadProc = proc;
+}
+
 WindowPtr
 RealChildHead(register WindowPtr pWin)
 {
diff --git a/nx-X11/programs/Xserver/include/colormap.h b/nx-X11/programs/Xserver/include/colormap.h
index 67f44193d..bfc6667db 100644
--- a/nx-X11/programs/Xserver/include/colormap.h
+++ b/nx-X11/programs/Xserver/include/colormap.h
@@ -181,4 +181,8 @@ extern int IsMapInstalled(
     Colormap /*map*/,
     WindowPtr /*pWin*/);
 
+extern Bool ResizeVisualArray(ScreenPtr /* pScreen */ ,
+                              int /* new_vis_count */ ,
+                              DepthPtr /* depth */ );
+
 #endif /* CMAP_H */
diff --git a/nx-X11/programs/Xserver/include/window.h b/nx-X11/programs/Xserver/include/window.h
index 571115365..9e670995d 100644
--- a/nx-X11/programs/Xserver/include/window.h
+++ b/nx-X11/programs/Xserver/include/window.h
@@ -102,6 +102,10 @@ extern void ClippedRegionFromBox(
     int /*w*/,
     int /*h*/);
 
+typedef WindowPtr (* RealChildHeadProc) (WindowPtr pWin);
+
+void RegisterRealChildHeadProc (RealChildHeadProc proc);
+
 extern WindowPtr RealChildHead(
     WindowPtr /*pWin*/);
 
diff --git a/nx-X11/programs/Xserver/include/windowstr.h b/nx-X11/programs/Xserver/include/windowstr.h
index 5c181bc51..c32842fe3 100644
--- a/nx-X11/programs/Xserver/include/windowstr.h
+++ b/nx-X11/programs/Xserver/include/windowstr.h
@@ -96,6 +96,33 @@ typedef struct _WindowOpt {
 #define BackgroundPixel	    2L
 #define BackgroundPixmap    3L
 
+/*
+ * The redirectDraw field can have one of three values:
+ *
+ *  RedirectDrawNone
+ *	A normal window; painted into the same pixmap as the parent
+ *	and clipping parent and siblings to its geometry. These
+ *	windows get a clip list equal to the intersection of their
+ *	geometry with the parent geometry, minus the geometry
+ *	of overlapping None and Clipped siblings.
+ *  RedirectDrawAutomatic
+ *	A redirected window which clips parent and sibling drawing.
+ *	Contents for these windows are manage inside the server.
+ *	These windows get an internal clip list equal to their
+ *	geometry.
+ *  RedirectDrawManual
+ *	A redirected window which does not clip parent and sibling
+ *	drawing; the window must be represented within the parent
+ *	geometry by the client performing the redirection management.
+ *	Contents for these windows are managed outside the server.
+ *	These windows get an internal clip list equal to their
+ *	geometry.
+ */
+
+#define RedirectDrawNone	0
+#define RedirectDrawAutomatic	1
+#define RedirectDrawManual	2
+
 typedef struct _Window {
     DrawableRec		drawable;
     WindowPtr		parent;		/* ancestor chain */
@@ -138,7 +165,7 @@ typedef struct _Window {
     unsigned		srcBuffer:1;	/* source buffer for rendering */
 #endif
 #ifdef COMPOSITE
-    unsigned		redirectDraw:1;	/* rendering is redirected from here */
+    unsigned		redirectDraw:2;	/* rendering is redirected from here */
 #endif
     DevUnion		*devPrivates;
 } WindowRec;
diff --git a/nx-X11/programs/Xserver/render/picture.c b/nx-X11/programs/Xserver/render/picture.c
index 5d8496610..ddb21a07c 100644
--- a/nx-X11/programs/Xserver/render/picture.c
+++ b/nx-X11/programs/Xserver/render/picture.c
@@ -1649,6 +1649,99 @@ FreePictFormat (void *	pPictFormat,
     return Success;
 }
 
+/**
+ * ReduceCompositeOp is used to choose simpler ops for cases where alpha
+ * channels are always one and so math on the alpha channel per pixel becomes
+ * unnecessary.  It may also avoid destination reads sometimes if apps aren't
+ * being careful to avoid these cases.
+ */
+static CARD8
+ReduceCompositeOp (CARD8 op, PicturePtr pSrc, PicturePtr pMask, PicturePtr pDst)
+{
+    Bool no_src_alpha, no_dst_alpha;
+
+    no_src_alpha = PICT_FORMAT_COLOR(pSrc->format) &&
+                   PICT_FORMAT_A(pSrc->format) == 0 &&
+                   pSrc->alphaMap == NULL &&
+                   pMask == NULL;
+    no_dst_alpha = PICT_FORMAT_COLOR(pDst->format) &&
+                   PICT_FORMAT_A(pDst->format) == 0 &&
+                   pDst->alphaMap == NULL;
+
+    /* TODO, maybe: Conjoint and Disjoint op reductions? */
+ 
+    /* Deal with simplifications where the source alpha is always 1. */
+    if (no_src_alpha)
+    {
+	switch (op) {
+	case PictOpOver:
+	    op = PictOpSrc;
+	    break;
+	case PictOpInReverse:
+	    op = PictOpDst;
+	    break;
+	case PictOpOutReverse:
+	    op = PictOpClear;
+	    break;
+	case PictOpAtop:
+	    op = PictOpIn;
+	    break;
+	case PictOpAtopReverse:
+	    op = PictOpOverReverse;
+	    break;
+	case PictOpXor:
+	    op = PictOpOut;
+	    break;
+	default:
+	    break;
+	}
+    }
+
+    /* Deal with simplifications when the destination alpha is always 1 */
+    if (no_dst_alpha)
+    {
+	switch (op) {
+	case PictOpOverReverse:
+	    op = PictOpDst;
+	    break;
+	case PictOpIn:
+	    op = PictOpSrc;
+	    break;
+	case PictOpOut:
+	    op = PictOpClear;
+	    break;
+	case PictOpAtop:
+	    op = PictOpOver;
+	    break;
+	case PictOpXor:
+	    op = PictOpOutReverse;
+	    break;
+	default:
+	    break;
+	}
+    }
+
+    /* Reduce some con/disjoint ops to the basic names. */
+    switch (op) {
+    case PictOpDisjointClear:
+    case PictOpConjointClear:
+	op = PictOpClear;
+	break;
+    case PictOpDisjointSrc:
+    case PictOpConjointSrc:
+	op = PictOpSrc;
+	break;
+    case PictOpDisjointDst:
+    case PictOpConjointDst:
+	op = PictOpDst;
+	break;
+    default:
+	break;
+    }
+
+    return op;
+}
+
 void
 CompositePicture (CARD8		op,
 		  PicturePtr	pSrc,
@@ -1669,6 +1762,11 @@ CompositePicture (CARD8		op,
     if (pMask)
 	ValidatePicture (pMask);
     ValidatePicture (pDst);
+
+    op = ReduceCompositeOp (op, pSrc, pMask, pDst);
+    if (op == PictOpDst)
+	return;
+
     (*ps->Composite) (op,
 		       pSrc,
 		       pMask,