diff --git a/Xext/panoramiX.c b/Xext/panoramiX.c
index 15c38a90f..ce0d072da 100644
--- a/Xext/panoramiX.c
+++ b/Xext/panoramiX.c
@@ -54,6 +54,7 @@ Equipment Corporation.
 #include "resource.h"
 #include "picturestr.h"
 #include "xfixesint.h"
+#include "damageextint.h"
 #ifdef COMPOSITE
 #include "compint.h"
 #endif
@@ -582,6 +583,7 @@ PanoramiXExtensionInit(void)
 
     PanoramiXRenderInit();
     PanoramiXFixesInit();
+    PanoramiXDamageInit();
 #ifdef COMPOSITE
     PanoramiXCompositeInit();
 #endif
@@ -887,6 +889,7 @@ PanoramiXResetProc(ExtensionEntry * extEntry)
 
     PanoramiXRenderReset();
     PanoramiXFixesReset();
+    PanoramiXDamageReset();
 #ifdef COMPOSITE
     PanoramiXCompositeReset ();
 #endif
diff --git a/damageext/damageext.c b/damageext/damageext.c
index 9521c2676..d6469230d 100644
--- a/damageext/damageext.c
+++ b/damageext/damageext.c
@@ -1,5 +1,6 @@
 /*
  * Copyright © 2002 Keith Packard
+ * Copyright 2013 Red Hat, Inc.
  *
  * Permission to use, copy, modify, distribute, and sell this software and its
  * documentation for any purpose is hereby granted without fee, provided that
@@ -25,9 +26,24 @@
 #endif
 
 #include "damageextint.h"
+#include "damagestr.h"
 #include "protocol-versions.h"
 #include "extinit.h"
 
+#ifdef PANORAMIX
+#include "panoramiX.h"
+#include "panoramiXsrv.h"
+
+typedef struct {
+    DamageExtPtr ext;
+    DamagePtr damage[MAXSCREENS];
+} PanoramiXDamageRes;
+
+static RESTYPE XRT_DAMAGE;
+static int (*PanoramiXSaveDamageCreate) (ClientPtr);
+
+#endif
+
 static unsigned char DamageReqCode;
 static int DamageEventBase;
 static RESTYPE DamageExtType;
@@ -36,14 +52,50 @@ static DevPrivateKeyRec DamageClientPrivateKeyRec;
 
 #define DamageClientPrivateKey (&DamageClientPrivateKeyRec)
 
+static void
+DamageNoteCritical(ClientPtr pClient)
+{
+    DamageClientPtr pDamageClient = GetDamageClient(pClient);
+
+    /* Composite extension marks clients with manual Subwindows as critical */
+    if (pDamageClient->critical > 0) {
+        SetCriticalOutputPending();
+        pClient->smart_priority = SMART_MAX_PRIORITY;
+    }
+}
+
+static void
+damageGetGeometry(DrawablePtr draw, int *x, int *y, int *w, int *h)
+{
+#ifdef PANORAMIX
+    if (!noPanoramiXExtension && draw->type == DRAWABLE_WINDOW) {
+        WindowPtr win = (WindowPtr)draw;
+
+        if (!win->parent) {
+            *x = screenInfo.x;
+            *y = screenInfo.y;
+            *w = screenInfo.width;
+            *h = screenInfo.height;
+            return;
+        }
+    }
+#endif
+
+    *x = draw->x;
+    *y = draw->y;
+    *w = draw->width;
+    *h = draw->height;
+}
+
 static void
 DamageExtNotify(DamageExtPtr pDamageExt, BoxPtr pBoxes, int nBoxes)
 {
     ClientPtr pClient = pDamageExt->pClient;
-    DamageClientPtr pDamageClient = GetDamageClient(pClient);
     DrawablePtr pDrawable = pDamageExt->pDrawable;
     xDamageNotifyEvent ev;
-    int i;
+    int i, x, y, w, h;
+
+    damageGetGeometry(pDrawable, &x, &y, &w, &h);
 
     UpdateCurrentTimeIf();
     ev = (xDamageNotifyEvent) {
@@ -52,10 +104,10 @@ DamageExtNotify(DamageExtPtr pDamageExt, BoxPtr pBoxes, int nBoxes)
         .drawable = pDamageExt->drawable,
         .damage = pDamageExt->id,
         .timestamp = currentTime.milliseconds,
-        .geometry.x = pDrawable->x,
-        .geometry.y = pDrawable->y,
-        .geometry.width = pDrawable->width,
-        .geometry.height = pDrawable->height
+        .geometry.x = x,
+        .geometry.y = y,
+        .geometry.width = w,
+        .geometry.height = h
     };
     if (pBoxes) {
         for (i = 0; i < nBoxes; i++) {
@@ -72,15 +124,12 @@ DamageExtNotify(DamageExtPtr pDamageExt, BoxPtr pBoxes, int nBoxes)
     else {
         ev.area.x = 0;
         ev.area.y = 0;
-        ev.area.width = pDrawable->width;
-        ev.area.height = pDrawable->height;
+        ev.area.width = w;
+        ev.area.height = h;
         WriteEventsToClient(pClient, 1, (xEvent *) &ev);
     }
-    /* Composite extension marks clients with manual Subwindows as critical */
-    if (pDamageClient->critical > 0) {
-        SetCriticalOutputPending();
-        pClient->smart_priority = SMART_MAX_PRIORITY;
-    }
+
+    DamageNoteCritical(pClient);
 }
 
 static void
@@ -162,23 +211,62 @@ ProcDamageQueryVersion(ClientPtr client)
     return Success;
 }
 
-static int
-ProcDamageCreate(ClientPtr client)
+static void
+DamageExtRegister(DrawablePtr pDrawable, DamagePtr pDamage, Bool report)
+{
+    DamageSetReportAfterOp(pDamage, TRUE);
+    DamageRegister(pDrawable, pDamage);
+
+    if (report) {
+        RegionPtr pRegion = &((WindowPtr) pDrawable)->borderClip;
+        RegionTranslate(pRegion, -pDrawable->x, -pDrawable->y);
+        DamageReportDamage(pDamage, pRegion);
+        RegionTranslate(pRegion, pDrawable->x, pDrawable->y);
+    }
+}
+
+static DamageExtPtr
+DamageExtCreate(DrawablePtr pDrawable, DamageReportLevel level,
+                ClientPtr client, XID id, XID drawable)
+{
+    DamageExtPtr pDamageExt = malloc(sizeof(DamageExtRec));
+    if (!pDamageExt)
+        return NULL;
+
+    pDamageExt->id = id;
+    pDamageExt->drawable = drawable;
+    pDamageExt->pDrawable = pDrawable;
+    pDamageExt->level = level;
+    pDamageExt->pClient = client;
+    pDamageExt->pDamage = DamageCreate(DamageExtReport, DamageExtDestroy, level,
+                                       FALSE, pDrawable->pScreen, pDamageExt);
+    if (!pDamageExt->pDamage) {
+        free(pDamageExt);
+        return NULL;
+    }
+
+    if (!AddResource(id, DamageExtType, (pointer) pDamageExt))
+        return NULL;
+
+    DamageExtRegister(pDrawable, pDamageExt->pDamage,
+                      pDrawable->type == DRAWABLE_WINDOW);
+
+    return pDamageExt;
+}
+
+static DamageExtPtr
+doDamageCreate(ClientPtr client, int *rc)
 {
     DrawablePtr pDrawable;
     DamageExtPtr pDamageExt;
     DamageReportLevel level;
-    RegionPtr pRegion;
-    int rc;
 
     REQUEST(xDamageCreateReq);
 
-    REQUEST_SIZE_MATCH(xDamageCreateReq);
-    LEGAL_NEW_RESOURCE(stuff->damage, client);
-    rc = dixLookupDrawable(&pDrawable, stuff->drawable, client, 0,
-                           DixGetAttrAccess | DixReadAccess);
-    if (rc != Success)
-        return rc;
+    *rc = dixLookupDrawable(&pDrawable, stuff->drawable, client, 0,
+                            DixGetAttrAccess | DixReadAccess);
+    if (*rc != Success)
+        return NULL;
 
     switch (stuff->level) {
     case XDamageReportRawRectangles:
@@ -195,39 +283,27 @@ ProcDamageCreate(ClientPtr client)
         break;
     default:
         client->errorValue = stuff->level;
-        return BadValue;
+        *rc = BadValue;
+        return NULL;
     }
 
-    pDamageExt = malloc(sizeof(DamageExtRec));
+    pDamageExt = DamageExtCreate(pDrawable, level, client, stuff->damage,
+                                 stuff->drawable);
     if (!pDamageExt)
-        return BadAlloc;
-    pDamageExt->id = stuff->damage;
-    pDamageExt->drawable = stuff->drawable;
-    pDamageExt->pDrawable = pDrawable;
-    pDamageExt->level = level;
-    pDamageExt->pClient = client;
-    pDamageExt->pDamage = DamageCreate(DamageExtReport,
-                                       DamageExtDestroy,
-                                       level,
-                                       FALSE, pDrawable->pScreen, pDamageExt);
-    if (!pDamageExt->pDamage) {
-        free(pDamageExt);
-        return BadAlloc;
-    }
-    if (!AddResource(stuff->damage, DamageExtType, (pointer) pDamageExt))
-        return BadAlloc;
+        *rc = BadAlloc;
 
-    DamageSetReportAfterOp(pDamageExt->pDamage, TRUE);
-    DamageRegister(pDamageExt->pDrawable, pDamageExt->pDamage);
+    return pDamageExt;
+}
 
-    if (pDrawable->type == DRAWABLE_WINDOW) {
-        pRegion = &((WindowPtr) pDrawable)->borderClip;
-        RegionTranslate(pRegion, -pDrawable->x, -pDrawable->y);
-        DamageReportDamage(pDamageExt->pDamage, pRegion);
-        RegionTranslate(pRegion, pDrawable->x, pDrawable->y);
-    }
-
-    return Success;
+static int
+ProcDamageCreate(ClientPtr client)
+{
+    int rc;
+    REQUEST(xDamageCreateReq);
+    REQUEST_SIZE_MATCH(xDamageCreateReq);
+    LEGAL_NEW_RESOURCE(stuff->damage, client);
+    doDamageCreate(client, &rc);
+    return rc;
 }
 
 static int
@@ -242,6 +318,88 @@ ProcDamageDestroy(ClientPtr client)
     return Success;
 }
 
+#ifdef PANORAMIX
+static RegionPtr
+DamageExtSubtractWindowClip(DamageExtPtr pDamageExt)
+{
+    WindowPtr win = (WindowPtr)pDamageExt->pDrawable;
+    PanoramiXRes *res = NULL;
+    RegionPtr ret;
+    int i;
+
+    if (!win->parent)
+        return &PanoramiXScreenRegion;
+
+    dixLookupResourceByType((void **)&res, win->drawable.id, XRT_WINDOW,
+                            serverClient, DixReadAccess);
+    if (!res)
+        return NULL;
+
+    ret = RegionCreate(NULL, 0);
+    if (!ret)
+        return NULL;
+
+    FOR_NSCREENS_FORWARD(i) {
+        ScreenPtr screen;
+        if (Success != dixLookupWindow(&win, res->info[i].id, serverClient,
+                                       DixReadAccess))
+            goto out;
+
+        screen = win->drawable.pScreen;
+
+        RegionTranslate(ret, -screen->x, -screen->y);
+        if (!RegionUnion(ret, ret, &win->borderClip))
+            goto out;
+        RegionTranslate(ret, screen->x, screen->y);
+    }
+
+    return ret;
+
+out:
+    RegionDestroy(ret);
+    return NULL;
+}
+
+static void
+DamageExtFreeWindowClip(RegionPtr reg)
+{
+    if (reg != &PanoramiXScreenRegion)
+        RegionDestroy(reg);
+}
+#endif
+
+/*
+ * DamageSubtract intersects with borderClip, so we must reconstruct the
+ * protocol's perspective of same...
+ */
+static Bool
+DamageExtSubtract(DamageExtPtr pDamageExt, const RegionPtr pRegion)
+{
+    DamagePtr pDamage = pDamageExt->pDamage;
+
+#ifdef PANORAMIX
+    if (!noPanoramiXExtension) {
+        RegionPtr damage = DamageRegion(pDamage);
+        RegionSubtract(damage, damage, pRegion);
+
+        if (pDamageExt->pDrawable->type == DRAWABLE_WINDOW) {
+            DrawablePtr pDraw = pDamageExt->pDrawable;
+            RegionPtr clip = DamageExtSubtractWindowClip(pDamageExt);
+            if (clip) {
+                RegionTranslate(clip, -pDraw->x, -pDraw->y);
+                RegionIntersect(damage, damage, clip);
+                RegionTranslate(clip, pDraw->x, pDraw->y);
+                DamageExtFreeWindowClip(clip);
+            }
+        }
+
+        return RegionNotEmpty(damage);
+    }
+#endif
+
+    return DamageSubtract(pDamage, pRegion);
+}
+
 static int
 ProcDamageSubtract(ClientPtr client)
 {
@@ -261,7 +419,7 @@ ProcDamageSubtract(ClientPtr client)
         if (pRepair) {
             if (pParts)
                 RegionIntersect(pParts, DamageRegion(pDamage), pRepair);
-            if (DamageSubtract(pDamage, pRepair))
+            if (DamageExtSubtract(pDamageExt, pRepair))
                 DamageExtReport(pDamage, DamageRegion(pDamage),
                                 (void *) pDamageExt);
         }
@@ -271,6 +429,7 @@ ProcDamageSubtract(ClientPtr client)
             DamageEmpty(pDamage);
         }
     }
+
     return Success;
 }
 
@@ -460,6 +619,125 @@ SDamageNotifyEvent(xDamageNotifyEvent * from, xDamageNotifyEvent * to)
     cpswaps(from->geometry.height, to->geometry.height);
 }
 
+#ifdef PANORAMIX
+
+static void
+PanoramiXDamageReport(DamagePtr pDamage, RegionPtr pRegion, void *closure)
+{
+    PanoramiXDamageRes *res = closure;
+    DamageExtPtr pDamageExt = res->ext;
+    WindowPtr pWin = (WindowPtr)pDamage->pDrawable;
+    ScreenPtr pScreen = pDamage->pScreen;
+
+    /* happens on unmap? sigh xinerama */
+    if (RegionNil(pRegion))
+        return;
+
+    /* translate root windows if necessary */
+    if (!pWin->parent)
+        RegionTranslate(pRegion, pScreen->x, pScreen->y);
+
+    /* add our damage to the protocol view */
+    DamageReportDamage(pDamageExt->pDamage, pRegion);
+
+    /* empty our view */
+    DamageEmpty(pDamage);
+}
+
+static void
+PanoramiXDamageExtDestroy(DamagePtr pDamage, void *closure)
+{
+    PanoramiXDamageRes *damage = closure;
+    damage->damage[pDamage->pScreen->myNum] = NULL;
+}
+
+static int
+PanoramiXDamageCreate(ClientPtr client)
+{
+    PanoramiXDamageRes *damage;
+    PanoramiXRes *draw;
+    int i, rc;
+
+    REQUEST(xDamageCreateReq);
+
+    REQUEST_SIZE_MATCH(xDamageCreateReq);
+    LEGAL_NEW_RESOURCE(stuff->damage, client);
+    rc = dixLookupResourceByClass((void **)&draw, stuff->drawable, XRC_DRAWABLE,
+                                  client, DixGetAttrAccess | DixReadAccess);
+    if (rc != Success)
+        return rc;
+
+    if (!(damage = calloc(1, sizeof(PanoramiXDamageRes))))
+        return BadAlloc;
+
+    if (!AddResource(stuff->damage, XRT_DAMAGE, damage))
+        return BadAlloc;
+
+    damage->ext = doDamageCreate(client, &rc);
+    if (rc == Success && draw->type == XRT_WINDOW) {
+        FOR_NSCREENS_FORWARD(i) {
+            DrawablePtr pDrawable;
+            DamagePtr pDamage = DamageCreate(PanoramiXDamageReport,
+                                             PanoramiXDamageExtDestroy,
+                                             DamageReportRawRegion,
+                                             FALSE,
+                                             screenInfo.screens[i],
+                                             damage);
+            if (!pDamage) {
+                rc = BadAlloc;
+            } else {
+                damage->damage[i] = pDamage;
+                rc = dixLookupDrawable(&pDrawable, draw->info[i].id, client,
+                                       M_WINDOW,
+                                       DixGetAttrAccess | DixReadAccess);
+            }
+            if (rc != Success)
+                break;
+
+            DamageExtRegister(pDrawable, pDamage, i != 0);
+        }
+    }
+
+    if (rc != Success)
+        FreeResource(stuff->damage, RT_NONE);
+
+    return rc;
+}
+
+static int
+PanoramiXDamageDelete(void *res, XID id)
+{
+    int i;
+    PanoramiXDamageRes *damage = res;
+
+    FOR_NSCREENS_BACKWARD(i) {
+        if (damage->damage[i]) {
+            DamageDestroy(damage->damage[i]);
+            damage->damage[i] = NULL;
+        }
+    }
+
+    free(damage);
+    return 1;
+}
+
+void
+PanoramiXDamageInit(void)
+{
+    XRT_DAMAGE = CreateNewResourceType(PanoramiXDamageDelete, "XineramaDamage");
+
+    PanoramiXSaveDamageCreate = ProcDamageVector[X_DamageCreate];
+    ProcDamageVector[X_DamageCreate] = PanoramiXDamageCreate;
+}
+
+void
+PanoramiXDamageReset(void)
+{
+    ProcDamageVector[X_DamageCreate] = PanoramiXSaveDamageCreate;
+}
+
+#endif /* PANORAMIX */
+
 void
 DamageExtensionInit(void)
 {
@@ -490,5 +768,10 @@ DamageExtensionInit(void)
             (EventSwapPtr) SDamageNotifyEvent;
         SetResourceTypeErrorValue(DamageExtType,
                                   extEntry->errorBase + BadDamage);
+#ifdef PANORAMIX
+        if (XRT_DAMAGE)
+            SetResourceTypeErrorValue(XRT_DAMAGE,
+                                      extEntry->errorBase + BadDamage);
+#endif
     }
 }
diff --git a/damageext/damageextint.h b/damageext/damageextint.h
index 272337922..e50149501 100644
--- a/damageext/damageextint.h
+++ b/damageext/damageextint.h
@@ -67,4 +67,7 @@ typedef struct _DamageExt {
 void
  DamageExtSetCritical(ClientPtr pClient, Bool critical);
 
+void PanoramiXDamageInit(void);
+void PanoramiXDamageReset(void);
+
 #endif                          /* _DAMAGEEXTINT_H_ */