Revert "DEBUG 13"

This reverts commit 3ea4291907ea00bf3cf2e73f2e3ab268a2e1c1b4.

Xext/shm.c

@@ -96,9 +96,7 @@ in this Software without prior written authorization from The Open Group.
 #endif /* XINERAMA */
 
 typedef struct _ShmScrPrivateRec {
-    CloseScreenProcPtr CloseScreen;
     ShmFuncsPtr shmFuncs;
-    DestroyPixmapProcPtr destroyPixmap;
 } ShmScrPrivateRec;
 
 Bool noMITShmExtension = FALSE;
@@ -109,8 +107,6 @@ static void ShmResetProc(ExtensionEntry *extEntry);
 static void SShmCompletionEvent(xShmCompletionEvent *from,
                                 xShmCompletionEvent *to);
 
-static Bool ShmDestroyPixmap(PixmapPtr pPixmap);
-
 static unsigned char ShmReqCode;
 int ShmCompletionCode;
 int BadShmSegCode;
@@ -195,15 +191,13 @@ CheckForShmSyscall(void)
 
 #endif
 
-static Bool
-ShmCloseScreen(ScreenPtr pScreen)
+static void
+ShmScreenClose(CallbackListPtr *pcbl, ScreenPtr pScreen, void *unused)
 {
     ShmScrPrivateRec *screen_priv = ShmGetScreenPriv(pScreen);
 
-    pScreen->CloseScreen = screen_priv->CloseScreen;
     dixSetPrivate(&pScreen->devPrivates, shmScrPrivateKey, NULL);
     free(screen_priv);
-    return (*pScreen->CloseScreen) (pScreen);
 }
 
 static ShmScrPrivateRec *
@@ -213,9 +207,8 @@ ShmInitScreenPriv(ScreenPtr pScreen)
 
     if (!screen_priv) {
         screen_priv = calloc(1, sizeof(ShmScrPrivateRec));
-        screen_priv->CloseScreen = pScreen->CloseScreen;
         dixSetPrivate(&pScreen->devPrivates, shmScrPrivateKey, screen_priv);
-        pScreen->CloseScreen = ShmCloseScreen;
+        dixScreenHookClose(pScreen, ShmScreenClose);
     }
     return screen_priv;
 }
@@ -247,28 +240,6 @@ ShmRegisterFuncs(ScreenPtr pScreen, ShmFuncsPtr funcs)
     ShmInitScreenPriv(pScreen)->shmFuncs = funcs;
 }
 
-static Bool
-ShmDestroyPixmap(PixmapPtr pPixmap)
-{
-    ScreenPtr pScreen = pPixmap->drawable.pScreen;
-    ShmScrPrivateRec *screen_priv = ShmGetScreenPriv(pScreen);
-    void *shmdesc = NULL;
-    Bool ret = TRUE;
-
-    if (pPixmap->refcnt == 1)
-        shmdesc = dixLookupPrivate(&pPixmap->devPrivates, shmPixmapPrivateKey);
-
-    pScreen->DestroyPixmap = screen_priv->destroyPixmap;
-    if (pScreen->DestroyPixmap)
-        ret = pScreen->DestroyPixmap(pPixmap);
-    screen_priv->destroyPixmap = pScreen->DestroyPixmap;
-    pScreen->DestroyPixmap = ShmDestroyPixmap;
-
-    if (shmdesc)
-	ShmDetachSegment(shmdesc, 0);
-
-    return ret;
-}
 
 void
 ShmRegisterFbFuncs(ScreenPtr pScreen)
@@ -437,6 +408,9 @@ ShmDetachSegment(void *value, /* must conform to DeleteType */
     ShmDescPtr shmdesc = (ShmDescPtr) value;
     ShmDescPtr *prev;
 
+    if (!shmdesc)
+        return Success;
+
     if (--shmdesc->refcnt)
         return TRUE;
 #if SHM_FD_PASSING
@@ -1514,6 +1488,14 @@ SProcShmDispatch(ClientPtr client)
     }
 }
 
+static void ShmPixmapDestroy(CallbackListPtr *pcbl, ScreenPtr pScreen, PixmapPtr pPixmap)
+{
+    ShmDetachSegment(
+        dixLookupPrivate(&pPixmap->devPrivates, shmPixmapPrivateKey),
+        0);
+    dixSetPrivate(&pPixmap->devPrivates, shmPixmapPrivateKey, NULL);
+}
+
 void
 ShmExtensionInit(void)
 {
@@ -1542,13 +1524,8 @@ ShmExtensionInit(void)
                 sharedPixmaps = xFalse;
         }
         if (sharedPixmaps)
-            for (i = 0; i < screenInfo.numScreens; i++) {
-                ShmScrPrivateRec *screen_priv =
-                    ShmGetScreenPriv(screenInfo.screens[i]);
-                screen_priv->destroyPixmap =
-                    screenInfo.screens[i]->DestroyPixmap;
-                screenInfo.screens[i]->DestroyPixmap = ShmDestroyPixmap;
-            }
+            for (i = 0; i < screenInfo.numScreens; i++)
+                dixScreenHookPixmapDestroy(screenInfo.screens[i], ShmPixmapDestroy);
     }
     ShmSegType = CreateNewResourceType(ShmDetachSegment, "ShmSeg");
     if (ShmSegType &&

Xext/xvdix.h

@@ -173,9 +173,6 @@ typedef struct {
     int version, revision;
     int nAdaptors;
     XvAdaptorPtr pAdaptors;
-    DestroyWindowProcPtr DestroyWindow;
-    DestroyPixmapProcPtr DestroyPixmap;
-    CloseScreenProcPtr CloseScreen;
 } XvScreenRec, *XvScreenPtr;
 
 extern _X_EXPORT int XvScreenInit(ScreenPtr);

Xext/xvmain.c

@@ -141,9 +141,7 @@ static void WriteSwappedVideoNotifyEvent(xvEvent *, xvEvent *);
 static void WriteSwappedPortNotifyEvent(xvEvent *, xvEvent *);
 static Bool CreateResourceTypes(void);
 
-static Bool XvCloseScreen(ScreenPtr);
-static Bool XvDestroyPixmap(PixmapPtr);
-static Bool XvDestroyWindow(WindowPtr);
+static void XvScreenClose(CallbackListPtr *pcbl, ScreenPtr, void *arg);
 static void XvResetProc(ExtensionEntry *);
 static int XvdiDestroyGrab(void *, XID);
 static int XvdiDestroyEncoding(void *, XID);
@@ -152,6 +150,7 @@ static int XvdiDestroyPortNotify(void *, XID);
 static int XvdiDestroyVideoNotifyList(void *, XID);
 static int XvdiDestroyPort(void *, XID);
 static int XvdiSendVideoNotify(XvPortPtr, DrawablePtr, int);
+static void XvStopAdaptors(DrawablePtr pDrawable);
 
 /*
 ** XvExtensionInit
@@ -257,6 +256,16 @@ CreateResourceTypes(void)
 
 }
 
+static void XvWindowDestroy(CallbackListPtr *pcbl, ScreenPtr pScreen, WindowPtr pWin)
+{
+    XvStopAdaptors(&pWin->drawable);
+}
+
+static void XvPixmapDestroy(CallbackListPtr *pcbl, ScreenPtr pScreen, PixmapPtr pPixmap)
+{
+    XvStopAdaptors(&pPixmap->drawable);
+}
+
 int
 XvScreenInit(ScreenPtr pScreen)
 {
@@ -290,34 +299,26 @@ XvScreenInit(ScreenPtr pScreen)
 
     dixSetPrivate(&pScreen->devPrivates, XvScreenKey, pxvs);
 
-    pxvs->DestroyPixmap = pScreen->DestroyPixmap;
-    pxvs->DestroyWindow = pScreen->DestroyWindow;
-    pxvs->CloseScreen = pScreen->CloseScreen;
-
-    pScreen->DestroyPixmap = XvDestroyPixmap;
-    pScreen->DestroyWindow = XvDestroyWindow;
-    pScreen->CloseScreen = XvCloseScreen;
+    dixScreenHookWindowDestroy(pScreen, XvWindowDestroy);
+    dixScreenHookClose(pScreen, XvScreenClose);
+    dixScreenHookPixmapDestroy(pScreen, XvPixmapDestroy);
 
     return Success;
 }
 
-static Bool
-XvCloseScreen(ScreenPtr pScreen)
+static void XvScreenClose(CallbackListPtr *pcbl, ScreenPtr pScreen, void *unused)
 {
-
     XvScreenPtr pxvs;
 
     pxvs = (XvScreenPtr) dixLookupPrivate(&pScreen->devPrivates, XvScreenKey);
 
-    pScreen->DestroyPixmap = pxvs->DestroyPixmap;
-    pScreen->DestroyWindow = pxvs->DestroyWindow;
-    pScreen->CloseScreen = pxvs->CloseScreen;
+    dixScreenUnhookWindowDestroy(pScreen, XvWindowDestroy);
+    dixScreenUnhookClose(pScreen, XvScreenClose);
+    dixScreenUnhookPixmapDestroy(pScreen, XvPixmapDestroy);
 
     free(pxvs);
 
     dixSetPrivate(&pScreen->devPrivates, XvScreenKey, NULL);
-
-    return (*pScreen->CloseScreen) (pScreen);
 }
 
 static void
@@ -367,40 +368,6 @@ XvStopAdaptors(DrawablePtr pDrawable)
     }
 }
 
-static Bool
-XvDestroyPixmap(PixmapPtr pPix)
-{
-    ScreenPtr pScreen = pPix->drawable.pScreen;
-    Bool status = TRUE;
-
-    if (pPix->refcnt == 1)
-        XvStopAdaptors(&pPix->drawable);
-
-    SCREEN_PROLOGUE(pScreen, DestroyPixmap);
-    if (pScreen->DestroyPixmap)
-        status = pScreen->DestroyPixmap(pPix);
-    SCREEN_EPILOGUE(pScreen, DestroyPixmap, XvDestroyPixmap);
-
-    return status;
-
-}
-
-static Bool
-XvDestroyWindow(WindowPtr pWin)
-{
-    ScreenPtr pScreen = pWin->drawable.pScreen;
-    Bool status;
-
-    XvStopAdaptors(&pWin->drawable);
-
-    SCREEN_PROLOGUE(pScreen, DestroyWindow);
-    status = (*pScreen->DestroyWindow) (pWin);
-    SCREEN_EPILOGUE(pScreen, DestroyWindow, XvDestroyWindow);
-
-    return status;
-
-}
-
 static int
 XvdiDestroyPort(void *pPort, XID id)
 {

Xext/xvmc.c

@@ -48,7 +48,6 @@ static RESTYPE XvMCRTSubpicture;
 typedef struct {
     int num_adaptors;
     XvMCAdaptorPtr adaptors;
-    CloseScreenProcPtr CloseScreen;
     char clientDriverName[DR_CLIENT_DRIVER_NAME_SIZE];
     char busID[DR_BUSID_SIZE];
     int major;
@@ -733,16 +732,12 @@ XvMCExtensionInit(void)
                               extEntry->errorBase + XvMCBadSubpicture);
 }
 
-static Bool
-XvMCCloseScreen(ScreenPtr pScreen)
+static void XvMCScreenClose(CallbackListPtr *pcbl, ScreenPtr pScreen, void *unused)
 {
     XvMCScreenPtr pScreenPriv = XVMC_GET_PRIVATE(pScreen);
-
-    pScreen->CloseScreen = pScreenPriv->CloseScreen;
-
     free(pScreenPriv);
-
-    return (*pScreen->CloseScreen) (pScreen);
+    dixSetPrivate(&pScreen->devPrivates, XvMCScreenKey, NULL);
+    dixScreenUnhookClose(pScreen, XvMCScreenClose);
 }
 
 int
@@ -758,8 +753,7 @@ XvMCScreenInit(ScreenPtr pScreen, int num, XvMCAdaptorPtr pAdapt)
 
     dixSetPrivate(&pScreen->devPrivates, XvMCScreenKey, pScreenPriv);
 
-    pScreenPriv->CloseScreen = pScreen->CloseScreen;
-    pScreen->CloseScreen = XvMCCloseScreen;
+    dixScreenHookClose(pScreen, XvMCScreenClose);
 
     pScreenPriv->num_adaptors = num;
     pScreenPriv->adaptors = pAdapt;

composite/compinit.c

@@ -76,12 +76,13 @@ compCloseScreen(ScreenPtr pScreen)
     pScreen->ClipNotify = cs->ClipNotify;
     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->SourceValidate = cs->SourceValidate;
 
+    dixScreenUnhookWindowDestroy(pScreen, compWindowDestroy);
+    dixScreenUnhookWindowPosition(pScreen, compWindowPosition);
+
     free(cs);
     dixSetPrivate(&pScreen->devPrivates, CompScreenPrivateKey, NULL);
     ret = (*pScreen->CloseScreen) (pScreen);
@@ -368,8 +369,8 @@ compScreenInit(ScreenPtr pScreen)
     if (!disableBackingStore)
         pScreen->backingStoreSupport = WhenMapped;
 
-    cs->PositionWindow = pScreen->PositionWindow;
-    pScreen->PositionWindow = compPositionWindow;
+    dixScreenHookWindowDestroy(pScreen, compWindowDestroy);
+    dixScreenHookWindowPosition(pScreen, compWindowPosition);
 
     cs->CopyWindow = pScreen->CopyWindow;
     pScreen->CopyWindow = compCopyWindow;
@@ -377,9 +378,6 @@ compScreenInit(ScreenPtr pScreen)
     cs->CreateWindow = pScreen->CreateWindow;
     pScreen->CreateWindow = compCreateWindow;
 
-    cs->DestroyWindow = pScreen->DestroyWindow;
-    pScreen->DestroyWindow = compDestroyWindow;
-
     cs->RealizeWindow = pScreen->RealizeWindow;
     pScreen->RealizeWindow = compRealizeWindow;
 

composite/compint.h

@@ -125,10 +125,8 @@ typedef struct _CompImplicitRedirectException {
 } CompImplicitRedirectException;
 
 typedef struct _CompScreen {
-    PositionWindowProcPtr PositionWindow;
     CopyWindowProcPtr CopyWindow;
     CreateWindowProcPtr CreateWindow;
-    DestroyWindowProcPtr DestroyWindow;
     RealizeWindowProcPtr RealizeWindow;
     UnrealizeWindowProcPtr UnrealizeWindow;
     ClipNotifyProcPtr ClipNotify;
@@ -280,8 +278,9 @@ void
 Bool
  compCheckRedirect(WindowPtr pWin);
 
-Bool
- compPositionWindow(WindowPtr pWin, int x, int y);
+void compWindowPosition(CallbackListPtr *pcbl,
+                        ScreenPtr pScreen,
+                        XorgScreenWindowPositionParamRec *param);
 
 Bool
  compRealizeWindow(WindowPtr pWin);
@@ -309,8 +308,7 @@ void
 Bool
  compCreateWindow(WindowPtr pWin);
 
-Bool
- compDestroyWindow(WindowPtr pWin);
+void compWindowDestroy(CallbackListPtr *pcbl, ScreenPtr pScreen, WindowPtr pWin);
 
 void
  compSetRedirectBorderClip(WindowPtr pWin, RegionPtr pRegion);

composite/compwindow.c

@@ -224,14 +224,9 @@ updateOverlayWindow(ScreenPtr pScreen)
     return Success;
 }
 
-Bool
-compPositionWindow(WindowPtr pWin, int x, int y)
+void compWindowPosition(CallbackListPtr *pcbl, ScreenPtr pScreen, XorgScreenWindowPositionParamRec *param)
 {
-    ScreenPtr pScreen = pWin->drawable.pScreen;
-    CompScreenPtr cs = GetCompScreen(pScreen);
-    Bool ret = TRUE;
-
-    pScreen->PositionWindow = cs->PositionWindow;
+    WindowPtr pWin = param->window;
     /*
      * "Shouldn't need this as all possible places should be wrapped
      *
@@ -255,14 +250,8 @@ compPositionWindow(WindowPtr pWin, int x, int y)
         }
     }
 
-    if (!(*pScreen->PositionWindow) (pWin, x, y))
-        ret = FALSE;
-    cs->PositionWindow = pScreen->PositionWindow;
-    pScreen->PositionWindow = compPositionWindow;
     compCheckTree(pWin->drawable.pScreen);
-    if (updateOverlayWindow(pScreen) != Success)
-        ret = FALSE;
-    return ret;
+    updateOverlayWindow(pScreen);
 }
 
 Bool
@@ -596,16 +585,12 @@ compCreateWindow(WindowPtr pWin)
     return ret;
 }
 
-Bool
-compDestroyWindow(WindowPtr pWin)
+void compWindowDestroy(CallbackListPtr *pcbl, ScreenPtr pScreen, WindowPtr pWin)
 {
-    ScreenPtr pScreen = pWin->drawable.pScreen;
     CompScreenPtr cs = GetCompScreen(pScreen);
     CompWindowPtr cw;
     CompSubwindowsPtr csw;
-    Bool ret;
 
-    pScreen->DestroyWindow = cs->DestroyWindow;
     while ((cw = GetCompWindow(pWin)))
         FreeResource(cw->clients->id, X11_RESTYPE_NONE);
     while ((csw = GetCompSubwindows(pWin)))
@@ -617,16 +602,12 @@ compDestroyWindow(WindowPtr pWin)
         compSetParentPixmap(pWin);
         dixDestroyPixmap(pPixmap, 0);
     }
-    ret = (*pScreen->DestroyWindow) (pWin);
-    cs->DestroyWindow = pScreen->DestroyWindow;
-    pScreen->DestroyWindow = compDestroyWindow;
 
     /* Did we just destroy the overlay window? */
     if (pWin == cs->pOverlayWin)
         cs->pOverlayWin = NULL;
 
 /*    compCheckTree (pWin->drawable.pScreen); can't check -- tree isn't good*/
-    return ret;
 }
 
 void

dbe/dbe.c

@@ -81,12 +81,6 @@ DbeStubScreen(DbeScreenPrivPtr pDbeScreenPriv, int *nStubbedScreens)
     /* Stub DIX. */
     pDbeScreenPriv->SetupBackgroundPainter = NULL;
 
-    /* Do not unwrap PositionWindow nor DestroyWindow.  If the DDX
-     * initialization function failed, we assume that it did not wrap
-     * PositionWindow.  Also, DestroyWindow is only wrapped if the DDX
-     * initialization function succeeded.
-     */
-
     /* Stub DDX. */
     pDbeScreenPriv->GetVisualInfo = NULL;
     pDbeScreenPriv->AllocBackBufferName = NULL;
@@ -1201,7 +1195,9 @@ DbeWindowPrivDelete(void *pDbeWinPriv, XID id)
     return Success;
 
 }                               /* DbeWindowPrivDelete() */
-
+
+static void miDbeWindowDestroy(CallbackListPtr *pcbl, ScreenPtr pScreen, WindowPtr pWin);
+
 /******************************************************************************
  *
  * DBE DIX Procedure: DbeResetProc
@@ -1225,55 +1221,30 @@ DbeResetProc(ExtensionEntry * extEntry)
         pDbeScreenPriv = DBE_SCREEN_PRIV(pScreen);
 
         if (pDbeScreenPriv) {
-            /* Unwrap DestroyWindow, which was wrapped in DbeExtensionInit(). */
-            pScreen->DestroyWindow = pDbeScreenPriv->DestroyWindow;
-            pScreen->PositionWindow = pDbeScreenPriv->PositionWindow;
+            dixScreenUnhookWindowDestroy(pScreen, miDbeWindowDestroy);
+            dixScreenUnhookWindowPosition(pScreen, miDbeWindowPosition);
             free(pDbeScreenPriv);
         }
     }
-}                               /* DbeResetProc() */
-
-/******************************************************************************
- *
- * DBE DIX Procedure: DbeDestroyWindow
- *
- * Description:
- *
- *     This is the wrapper for pScreen->DestroyWindow.
- *     This function frees buffer resources for a window before it is
- *     destroyed.
- *
- *****************************************************************************/
+}
 
-static Bool
-DbeDestroyWindow(WindowPtr pWin)
-{
-    DbeScreenPrivPtr pDbeScreenPriv;
-    DbeWindowPrivPtr pDbeWindowPriv;
-    ScreenPtr pScreen;
-    Bool ret;
-
-    /*
-     **************************************************************************
-     ** 1. Unwrap the member routine.
-     **************************************************************************
+/**
+ * @brief window destroy callback
+ *
+ * Called by DIX when window is being destroyed.
+ *
  */
-
-    pScreen = pWin->drawable.pScreen;
-    pDbeScreenPriv = DBE_SCREEN_PRIV(pScreen);
-    pScreen->DestroyWindow = pDbeScreenPriv->DestroyWindow;
-
+static void miDbeWindowDestroy(CallbackListPtr *pcbl, ScreenPtr pScreen, WindowPtr pWin)
+{
     /*
      **************************************************************************
-     ** 2. Do any work necessary before the member routine is called.
-     **
      **    Call the window priv delete function for all buffer IDs associated
      **    with this window.
      **************************************************************************
      */
 
-    if ((pDbeWindowPriv = DBE_WINDOW_PRIV(pWin))) {
-        while (pDbeWindowPriv) {
+    DbeWindowPrivPtr pDbeWindowPriv;
+    while ((pDbeWindowPriv = DBE_WINDOW_PRIV(pWin))) {
             /* *DbeWinPrivDelete() will free the window private and set it to
              * NULL if there are no more buffer IDs associated with this
              * window.
@@ -1283,36 +1254,6 @@ DbeDestroyWindow(WindowPtr pWin)
     }
 }
 
-    /*
-     **************************************************************************
-     ** 3. Call the member routine, saving its result if necessary.
-     **************************************************************************
-     */
-
-    ret = (*pScreen->DestroyWindow) (pWin);
-
-    /*
-     **************************************************************************
-     ** 4. Rewrap the member routine, restoring the wrapper value first in case
-     **    the wrapper (or something that it wrapped) change this value.
-     **************************************************************************
-     */
-
-    pDbeScreenPriv->DestroyWindow = pScreen->DestroyWindow;
-    pScreen->DestroyWindow = DbeDestroyWindow;
-
-    /*
-     **************************************************************************
-     ** 5. Do any work necessary after the member routine has been called.
-     **
-     **    In this case we do not need to do anything.
-     **************************************************************************
-     */
-
-    return ret;
-
-}                               /* DbeDestroyWindow() */
-
 /******************************************************************************
  *
  * DBE DIX Procedure: DbeExtensionInit
@@ -1395,12 +1336,10 @@ DbeExtensionInit(void)
             pDbeScreenPriv = DBE_SCREEN_PRIV(pScreen);
 
             if (ddxInitSuccess) {
-                /* Wrap DestroyWindow.  The DDX initialization function
-                 * already wrapped PositionWindow for us.
+                /* Hook in our window destructor. The DDX initialization function
+                 * already added WindowPosition hook for us.
                  */
-
-                pDbeScreenPriv->DestroyWindow = pScreen->DestroyWindow;
-                pScreen->DestroyWindow = DbeDestroyWindow;
+                dixScreenHookWindowDestroy(pScreen, miDbeWindowDestroy);
             }
             else {
                 /* DDX initialization failed.  Stub the screen. */

dbe/dbestruct.h

@@ -169,13 +169,6 @@ typedef struct _DbeWindowPrivRec {
  */
 
 typedef struct _DbeScreenPrivRec {
-    /* Wrapped functions
-     * It is the responsibility of the DDX layer to wrap PositionWindow().
-     * DbeExtensionInit wraps DestroyWindow().
-     */
-    PositionWindowProcPtr PositionWindow;
-    DestroyWindowProcPtr DestroyWindow;
-
     /* Per-screen DIX routines */
     Bool (*SetupBackgroundPainter) (WindowPtr /*pWin */ ,
                                     GCPtr       /*pGC */

dbe/midbe.c

@@ -375,14 +375,13 @@ miDbeSwapBuffers(ClientPtr client, int *pNumWindows, DbeSwapInfoPtr swapInfo)
  *     the resources associated with a DBE buffer ID.  There are 5 ways that
  *     miDbeWinPrivDelete() can be called by FreeResource().  They are:
  *
- *     - A DBE window is destroyed, in which case the DbeDestroyWindow()
- *       wrapper is invoked.  The wrapper calls FreeResource() for all DBE
- *       buffer IDs.
+ *     - A DBE window is destroyed, in which case the DbeWindowDestroy()
+ *       callback is invoked.  It calls FreeResource() for all DBE buffer IDs.
  *
  *     - miDbeAllocBackBufferName() calls FreeResource() to clean up resources
  *       after a buffer allocation failure.
  *
- *     - The PositionWindow wrapper, miDbePositionWindow(), calls
+ *     - The WindowPosition hook, miDbeWindowPosition(), calls
  *       FreeResource() when it fails to create buffers of the new size.
  *       FreeResource() is called for all DBE buffer IDs.
  *
@@ -432,22 +431,20 @@ miDbeWinPrivDelete(DbeWindowPrivPtr pDbeWindowPriv, XID bufId)
     if (pDbeWindowPriv->pBackBuffer)
         dixDestroyPixmap(pDbeWindowPriv->pBackBuffer, 0);
 }                               /* miDbeWinPrivDelete() */
-
+
 /******************************************************************************
  *
- * DBE MI Procedure: miDbePositionWindow
+ * DBE MI Procedure: miDbeWindowPosition
  *
  * Description:
  *
- *     This function was cloned from miMbxPositionWindow() in mimultibuf.c.
+ *     This function was cloned from miMbxWindowPosition() in mimultibuf.c.
  *     This function resizes the buffer when the window is resized.
  *
  *****************************************************************************/
 
-static Bool
-miDbePositionWindow(WindowPtr pWin, int x, int y)
+void miDbeWindowPosition(CallbackListPtr *pcbl, ScreenPtr pScreen, XorgScreenWindowPositionParamRec *param)
 {
-    ScreenPtr pScreen;
     DbeScreenPrivPtr pDbeScreenPriv;
     DbeWindowPrivPtr pDbeWindowPriv;
     int width, height;
@@ -460,43 +457,9 @@ miDbePositionWindow(WindowPtr pWin, int x, int y)
     Bool clear;
     GCPtr pGC;
     xRectangle clearRect;
-    Bool ret;
 
-    /*
-     **************************************************************************
-     ** 1. Unwrap the member routine.
-     **************************************************************************
-     */
-
-    pScreen = pWin->drawable.pScreen;
+    WindowPtr pWin = param->window;
     pDbeScreenPriv = DBE_SCREEN_PRIV(pScreen);
-    pScreen->PositionWindow = pDbeScreenPriv->PositionWindow;
-
-    /*
-     **************************************************************************
-     ** 2. Do any work necessary before the member routine is called.
-     **
-     **    In this case we do not need to do anything.
-     **************************************************************************
-     */
-
-    /*
-     **************************************************************************
-     ** 3. Call the member routine, saving its result if necessary.
-     **************************************************************************
-     */
-
-    ret = (*pScreen->PositionWindow) (pWin, x, y);
-
-    /*
-     **************************************************************************
-     ** 4. Rewrap the member routine, restoring the wrapper value first in case
-     **    the wrapper (or something that it wrapped) change this value.
-     **************************************************************************
-     */
-
-    pDbeScreenPriv->PositionWindow = pScreen->PositionWindow;
-    pScreen->PositionWindow = miDbePositionWindow;
 
     /*
      **************************************************************************
@@ -504,14 +467,12 @@ miDbePositionWindow(WindowPtr pWin, int x, int y)
      **************************************************************************
      */
 
-    if (!(pDbeWindowPriv = DBE_WINDOW_PRIV(pWin))) {
-        return ret;
-    }
+    if (!(pDbeWindowPriv = DBE_WINDOW_PRIV(pWin)))
+        return;
 
     if (pDbeWindowPriv->width == pWin->drawable.width &&
-        pDbeWindowPriv->height == pWin->drawable.height) {
-        return ret;
-    }
+        pDbeWindowPriv->height == pWin->drawable.height)
+        return;
 
     width = pWin->drawable.width;
     height = pWin->drawable.height;
@@ -595,7 +556,7 @@ miDbePositionWindow(WindowPtr pWin, int x, int y)
         }
 
         FreeScratchGC(pGC);
-        return FALSE;
+        return;
     }
 
     else {
@@ -645,11 +606,8 @@ miDbePositionWindow(WindowPtr pWin, int x, int y)
 
         FreeScratchGC(pGC);
     }
+}
 
-    return ret;
-
-}                               /* miDbePositionWindow() */
-
 /******************************************************************************
  *
  * DBE MI Procedure: miDbeInit
@@ -663,9 +621,7 @@ miDbePositionWindow(WindowPtr pWin, int x, int y)
 Bool
 miDbeInit(ScreenPtr pScreen, DbeScreenPrivPtr pDbeScreenPriv)
 {
-    /* Wrap functions. */
-    pDbeScreenPriv->PositionWindow = pScreen->PositionWindow;
-    pScreen->PositionWindow = miDbePositionWindow;
+    dixScreenHookWindowPosition(pScreen, miDbeWindowPosition);
 
     /* Initialize the per-screen DBE function pointers. */
     pDbeScreenPriv->GetVisualInfo = miDbeGetVisualInfo;

dbe/midbe.h

@@ -53,4 +53,6 @@ extern DevPrivateKeyRec dbeWindowPrivKeyRec;
 extern RESTYPE dbeDrawableResType;
 extern RESTYPE dbeWindowPrivResType;
 
+void miDbeWindowPosition(CallbackListPtr *pcbl, ScreenPtr pScreen, XorgScreenWindowPositionParamRec *param);
+
 #endif                          /* MIDBE_H */

dix/callback_priv.h

@@ -10,4 +10,15 @@
 void InitCallbackManager(void);
 void DeleteCallbackManager(void);
 
+/*
+ * @brief delete a callback list
+ *
+ * Calling this is necessary if a CallbackListPtr is used inside a dynamically
+ * allocated structure, before it is freed. If it's not done, memory corruption
+ * or segfault can happen at a much later point (eg. next server incarnation)
+ *
+ * @param pcbl pointer to the list head (CallbackListPtr)
+ */
+void DeleteCallbackList(CallbackListPtr *pcbl);
+
 #endif /* _XSERVER_CALLBACK_PRIV_H */

dix/dispatch.c

@@ -1462,6 +1462,8 @@ int
 dixDestroyPixmap(void *value, XID pid)
 {
     PixmapPtr pPixmap = (PixmapPtr) value;
+    if (pPixmap && pPixmap->refcnt == 1)
+        dixScreenRaisePixmapDestroy(pPixmap);
     if (pPixmap && pPixmap->drawable.pScreen && pPixmap->drawable.pScreen->DestroyPixmap)
         return pPixmap->drawable.pScreen->DestroyPixmap(pPixmap);
     return TRUE;

dix/dix_priv.h

@@ -255,4 +255,59 @@ extern Bool enableBackingStore;
 /* in generated BuiltInAtoms.c */
 void MakePredeclaredAtoms(void);
 
+void dixFreeScreen(ScreenPtr pScreen);
+
+/*
+ * @brief call screen's window destructors
+ * @see dixScreenHookWindowDestroy
+ * @param pWin the window thats being destroyed
+ * @result the ScreenRec's DestroyWindow() return value
+ *
+ * Call the pluggable window destructors that extensions might have registered on
+ * the screen, and finally call ScreenRec's DestroyWindow proc.
+ *
+ * Should only be called by DIX itself.
+ */
+int dixScreenRaiseWindowDestroy(WindowPtr pWin);
+
+/*
+ * @brief call screen's window position notification hooks
+ * @see dixScreenHookWindowPosition
+ * @param pWin the window to notify on
+ *
+ * Call the pluggable window position hooks that extensions might have registered on
+ * the screen, and finally call ScreenRec's PositionWindow proc.
+ *
+ * Should only be called by DIX itself.
+ */
+void dixScreenRaiseWindowPosition(WindowPtr pWin, uint32_t x, uint32_t y);
+
+/*
+ * @brief call screen's close hooks
+ * @see dixScreenHookClose
+ * @param pScreen the screen being closed
+ *
+ * Call the pluggable screen close hooks that extensions might have registered on
+ * the screen, and finally call ScreenRec's CloseScreen proc.
+ *
+ * Should only be called by DIX itself.
+ */
+void dixScreenRaiseClose(ScreenPtr pScreen);
+
+/*
+ * @brief call screen's PixmapDestroy hook
+ * @see dixScreenHookPixmapDestroy
+ * @param pPixmap the pixmap being destroyed
+ *
+ * Call the pluggable pixmap destroy pixmap hooks that extensions might have
+ * registered on the screen.
+ * Note that it's *only* called, when the pixmap is really being destroyed
+ * (instead of just unref'ed)
+ *
+ * Should only be called by DIX itself, by dixDestroyPixmap()
+ * It must be called *before* the ScreenRec->DestroyPixmap() is called, any
+ * only if the reference counter reaches 1.
+ */
+void dixScreenRaisePixmapDestroy(PixmapPtr pPixmap);
+
 #endif /* _XSERVER_DIX_PRIV_H */

dix/dixutils.c

@@ -695,8 +695,6 @@ _DeleteCallback(CallbackListPtr *pcbl, CallbackProcPtr callback, void *data)
     return FALSE;
 }
 
-static void DeleteCallbackList(CallbackListPtr *pcbl);
-
 void
 _CallCallbacks(CallbackListPtr *pcbl, void *call_data)
 {
@@ -747,25 +745,26 @@ _CallCallbacks(CallbackListPtr *pcbl, void *call_data)
     }
 }
 
-static void
-_DeleteCallbackList(CallbackListPtr *pcbl)
+void DeleteCallbackList(CallbackListPtr *pcbl)
 {
+    if (!pcbl || !*pcbl)
+        return;
+
     CallbackListPtr cbl = *pcbl;
-    CallbackPtr cbr, nextcbr;
-    int i;
 
     if (cbl->inCallback) {
         cbl->deleted = TRUE;
         return;
     }
 
-    for (i = 0; i < numCallbackListsToCleanup; i++) {
+    for (int i = 0; i < numCallbackListsToCleanup; i++) {
         if (listsToCleanup[i] == pcbl) {
             listsToCleanup[i] = NULL;
             break;
         }
     }
 
+    CallbackPtr cbr, nextcbr;
     for (cbr = cbl->list; cbr != NULL; cbr = nextcbr) {
         nextcbr = cbr->next;
         free(cbr);
@@ -829,13 +828,6 @@ DeleteCallback(CallbackListPtr *pcbl, CallbackProcPtr callback, void *data)
     return _DeleteCallback(pcbl, callback, data);
 }
 
-static void DeleteCallbackList(CallbackListPtr *pcbl)
-{
-    if (!pcbl || !*pcbl)
-        return;
-    _DeleteCallbackList(pcbl);
-}
-
 void
 DeleteCallbackManager(void)
 {

dix/gc.c

@@ -768,6 +768,8 @@ int
 FreeGC(void *value, XID gid)
 {
     GCPtr pGC = (GCPtr) value;
+    if (!pGC)
+        return BadMatch;
 
     CloseFont(pGC->font, (Font) 0);
     if (pGC->funcs)
@@ -819,13 +821,14 @@ CreateScratchGC(ScreenPtr pScreen, unsigned depth)
 }
 
 void
-FreeGCperDepth(int screenNum)
+FreeGCperDepth(ScreenPtr pScreen)
 {
     int i;
-    ScreenPtr pScreen;
     GCPtr *ppGC;
 
-    pScreen = screenInfo.screens[screenNum];
+    if (!pScreen)
+        return;
+
     ppGC = pScreen->GCperDepth;
 
     for (i = 0; i <= pScreen->numDepths; i++) {
@@ -900,13 +903,6 @@ CreateDefaultStipple(int screenNum)
     return TRUE;
 }
 
-void
-FreeDefaultStipple(int screenNum)
-{
-    ScreenPtr pScreen = screenInfo.screens[screenNum];
-    dixDestroyPixmap(pScreen->defaultStipple, 0);
-}
-
 int
 SetDashes(GCPtr pGC, unsigned offset, unsigned ndash, unsigned char *pdash)
 {

dix/gc_priv.h

@@ -22,14 +22,12 @@ int CopyGC(GCPtr pgcSrc, GCPtr pgcDst, BITS32 mask);
 
 int FreeGC(void *pGC, XID gid);
 
-void FreeGCperDepth(int screenNum);
+void FreeGCperDepth(ScreenPtr pScreen);
 
 Bool CreateGCperDepth(int screenNum);
 
 Bool CreateDefaultStipple(int screenNum);
 
-void FreeDefaultStipple(int screenNum);
-
 int SetDashes(GCPtr pGC, unsigned offset, unsigned ndash, unsigned char *pdash);
 
 int VerifyRectOrder(int nrects, xRectangle *prects, int ordering);

dix/main.c

@@ -318,23 +318,16 @@ dix_main(int argc, char *argv[], char *envp[])
         CloseDownEvents();
 
         for (i = screenInfo.numGPUScreens - 1; i >= 0; i--) {
-            ScreenPtr pScreen = screenInfo.gpuscreens[i];
-            dixFreeScreenSpecificPrivates(pScreen);
-            (*pScreen->CloseScreen) (pScreen);
-            dixFreePrivates(pScreen->devPrivates, PRIVATE_SCREEN);
-            free(pScreen);
+            dixFreeScreen(screenInfo.gpuscreens[i]);
             screenInfo.numGPUScreens = i;
         }
+        memset(&screenInfo.numGPUScreens, 0, sizeof(screenInfo.numGPUScreens));
 
         for (i = screenInfo.numScreens - 1; i >= 0; i--) {
-            FreeGCperDepth(i);
-            FreeDefaultStipple(i);
-            dixFreeScreenSpecificPrivates(screenInfo.screens[i]);
-            (*screenInfo.screens[i]->CloseScreen) (screenInfo.screens[i]);
-            dixFreePrivates(screenInfo.screens[i]->devPrivates, PRIVATE_SCREEN);
-            free(screenInfo.screens[i]);
+            dixFreeScreen(screenInfo.screens[i]);
             screenInfo.numScreens = i;
         }
+        memset(&screenInfo.screens, 0, sizeof(screenInfo.numGPUScreens));
 
         ReleaseClientIds(serverClient);
         dixFreePrivates(serverClient->devPrivates, PRIVATE_CLIENT);

dix/meson.build

@@ -27,7 +27,9 @@ srcs_dix = [
     'region.c',
     'registry.c',
     'resource.c',
+    'screen_hooks.c',
     'selection.c',
+    'screen.c',
     'swaprep.c',
     'swapreq.c',
     'tables.c',

dix/screen.c

@@ -0,0 +1,28 @@
+/* SPDX-License-Identifier: MIT OR X11
+ *
+ * Copyright © 2024 Enrico Weigelt, metux IT consult <info@metux.net>
+ */
+#include <dix-config.h>
+
+#include "dix/callback_priv.h"
+#include "dix/dix_priv.h"
+#include "dix/gc_priv.h"
+#include "include/screenint.h"
+#include "include/scrnintstr.h"
+
+void dixFreeScreen(ScreenPtr pScreen)
+{
+    if (!pScreen)
+        return;
+
+    FreeGCperDepth(pScreen);
+    dixDestroyPixmap(pScreen->defaultStipple, 0);
+    dixFreeScreenSpecificPrivates(pScreen);
+    pScreen->CloseScreen(pScreen);
+    dixFreePrivates(pScreen->devPrivates, PRIVATE_SCREEN);
+    DeleteCallbackList(&pScreen->hookWindowDestroy);
+    DeleteCallbackList(&pScreen->hookWindowPosition);
+    DeleteCallbackList(&pScreen->hookClose);
+    DeleteCallbackList(&pScreen->hookPixmapDestroy);
+    free(pScreen);
+}

dix/screen_hooks.c

@@ -0,0 +1,79 @@
+/* SPDX-License-Identifier: MIT OR X11
+ *
+ * Copyright © 2024 Enrico Weigelt, metux IT consult <info@metux.net>
+ */
+
+#include <dix-config.h>
+
+#include "dix/dix_priv.h"
+#include "include/dix.h"
+#include "include/os.h"
+#include "include/scrnintstr.h"
+#include "include/windowstr.h"
+
+#define DECLARE_HOOK_PROC(NAME, FIELD, TYPE) \
+    void dixScreenHook##NAME(ScreenPtr pScreen, TYPE func) \
+    { \
+        AddCallback(&pScreen->FIELD, (CallbackProcPtr)func, pScreen); \
+    } \
+    \
+    void dixScreenUnhook##NAME(ScreenPtr pScreen, TYPE func) \
+    { \
+        DeleteCallback(&pScreen->FIELD, (CallbackProcPtr)func, pScreen); \
+    }
+
+DECLARE_HOOK_PROC(WindowDestroy, hookWindowDestroy, XorgScreenWindowDestroyProcPtr);
+DECLARE_HOOK_PROC(WindowPosition, hookWindowPosition, XorgScreenWindowPositionProcPtr);
+DECLARE_HOOK_PROC(Close, hookClose, XorgScreenCloseProcPtr);
+DECLARE_HOOK_PROC(PixmapDestroy, hookPixmapDestroy, XorgScreenPixmapDestroyProcPtr);
+
+int dixScreenRaiseWindowDestroy(WindowPtr pWin)
+{
+    if (!pWin)
+        return Success;
+
+    ScreenPtr pScreen = pWin->drawable.pScreen;
+
+    CallCallbacks(&pScreen->hookWindowDestroy, pWin);
+
+    return (pScreen->DestroyWindow ? pScreen->DestroyWindow(pWin) : Success);
+}
+
+void dixScreenRaiseWindowPosition(WindowPtr pWin, uint32_t x, uint32_t y)
+{
+    if (!pWin)
+        return;
+
+    ScreenPtr pScreen = pWin->drawable.pScreen;
+
+    XorgScreenWindowPositionParamRec param = {
+        .window = pWin,
+        .x = x,
+        .y = y,
+    };
+
+    CallCallbacks(&pScreen->hookWindowPosition, &param);
+
+    if (pScreen->PositionWindow)
+        pScreen->PositionWindow(pWin, x, y);
+}
+
+void dixScreenRaiseClose(ScreenPtr pScreen) {
+    if (!pScreen)
+        return;
+
+    CallCallbacks(&pScreen->hookClose, NULL);
+
+    if (pScreen->CloseScreen)
+        pScreen->CloseScreen(pScreen);
+}
+
+void dixScreenRaisePixmapDestroy(PixmapPtr pPixmap)
+{
+    if (!pPixmap)
+        return;
+
+    ScreenPtr pScreen = pPixmap->drawable.pScreen;
+    CallCallbacks(&pScreen->hookPixmapDestroy, pPixmap);
+    /* we must not call the original ScreenRec->DestroyPixmap() here */
+}

dix/window.c

@@ -670,7 +670,8 @@ InitRootWindow(WindowPtr pWin)
 
     if (!(*pScreen->CreateWindow) (pWin))
         return;                 /* XXX */
-    (*pScreen->PositionWindow) (pWin, 0, 0);
+
+    dixScreenRaiseWindowPosition(pWin, 0, 0);
 
     pWin->cursorIsNone = FALSE;
     pWin->optional->cursor = RefCursor(rootCursor);
@@ -928,7 +929,7 @@ CreateWindow(Window wid, WindowPtr pParent, int x, int y, unsigned w,
         return NullWindow;
     }
     /* We SHOULD check for an error value here XXX */
-    (*pScreen->PositionWindow) (pWin, pWin->drawable.x, pWin->drawable.y);
+    dixScreenRaiseWindowPosition(pWin, pWin->drawable.x, pWin->drawable.y);
 
     if (!(vmask & CWEventMask))
         RecalculateDeliverableEvents(pWin);
@@ -998,8 +999,6 @@ DisposeWindowOptional(WindowPtr pWin)
 static void
 FreeWindowResources(WindowPtr pWin)
 {
-    ScreenPtr pScreen = pWin->drawable.pScreen;
-
     DeleteWindowFromAnySaveSet(pWin);
     DeleteWindowFromAnySelections(pWin);
     DeleteWindowFromAnyEvents(pWin, TRUE);
@@ -1019,8 +1018,9 @@ FreeWindowResources(WindowPtr pWin)
         dixDestroyPixmap(pWin->background.pixmap, 0);
 
     DeleteAllWindowProperties(pWin);
+
     /* We SHOULD check for an error value here XXX */
-    (*pScreen->DestroyWindow) (pWin);
+    dixScreenRaiseWindowDestroy(pWin);
     DisposeWindowOptional(pWin);
 }
 
@@ -1849,12 +1849,9 @@ GravityTranslate(int x, int y, int oldx, int oldy,
 void
 ResizeChildrenWinSize(WindowPtr pWin, int dx, int dy, int dw, int dh)
 {
-    ScreenPtr pScreen;
     WindowPtr pSib, pChild;
     Bool resized = (dw || dh);
 
-    pScreen = pWin->drawable.pScreen;
-
     for (pSib = pWin->firstChild; pSib; pSib = pSib->nextSib) {
         if (resized && (pSib->winGravity > NorthWestGravity)) {
             int cwsx, cwsy;
@@ -1879,7 +1876,8 @@ ResizeChildrenWinSize(WindowPtr pWin, int dx, int dy, int dw, int dh)
         pSib->drawable.y = pWin->drawable.y + pSib->origin.y;
         SetWinSize(pSib);
         SetBorderSize(pSib);
-        (*pScreen->PositionWindow) (pSib, pSib->drawable.x, pSib->drawable.y);
+
+        dixScreenRaiseWindowPosition(pSib, pSib->drawable.x, pSib->drawable.y);
 
         if ((pChild = pSib->firstChild)) {
             while (1) {
@@ -1889,7 +1887,7 @@ ResizeChildrenWinSize(WindowPtr pWin, int dx, int dy, int dw, int dh)
                     pChild->origin.y;
                 SetWinSize(pChild);
                 SetBorderSize(pChild);
-                (*pScreen->PositionWindow) (pChild,
+                dixScreenRaiseWindowPosition(pChild,
                                              pChild->drawable.x,
                                              pChild->drawable.y);
                 if (pChild->firstChild) {
@@ -2585,7 +2583,8 @@ ReparentWindow(WindowPtr pWin, WindowPtr pParent,
 
     if (pScreen->ReparentWindow)
         (*pScreen->ReparentWindow) (pWin, pPriorParent);
-    (*pScreen->PositionWindow) (pWin, pWin->drawable.x, pWin->drawable.y);
+
+    dixScreenRaiseWindowPosition(pWin, pWin->drawable.x, pWin->drawable.y);
     ResizeChildrenWinSize(pWin, 0, 0, 0, 0);
 
     CheckWindowOptionalNeed(pWin);

dri3/dri3.c

@@ -29,15 +29,11 @@ DevPrivateKeyRec dri3_screen_private_key;
 
 static int dri3_screen_generation;
 
-static Bool
-dri3_close_screen(ScreenPtr screen)
+static void dri3_screen_close(CallbackListPtr *pcbl, ScreenPtr screen, void *unused)
 {
     dri3_screen_priv_ptr screen_priv = dri3_screen_priv(screen);
-
-    unwrap(screen_priv, screen, CloseScreen);
-
+    dixScreenUnhookClose(screen, dri3_screen_close);
     free(screen_priv);
-    return (*screen->CloseScreen) (screen);
 }
 
 Bool
@@ -53,7 +49,7 @@ dri3_screen_init(ScreenPtr screen, const dri3_screen_info_rec *info)
         if (!screen_priv)
             return FALSE;
 
-        wrap(screen_priv, screen, CloseScreen, dri3_close_screen);
+        dixScreenHookClose(screen, dri3_screen_close);
 
         screen_priv->info = info;
 

dri3/dri3_priv.h

@@ -42,9 +42,7 @@ typedef struct dri3_dmabuf_format {
 } dri3_dmabuf_format_rec, *dri3_dmabuf_format_ptr;
 
 typedef struct dri3_screen_priv {
-    CloseScreenProcPtr          CloseScreen;
     ConfigNotifyProcPtr         ConfigNotify;
-    DestroyWindowProcPtr        DestroyWindow;
 
     Bool                        formats_cached;
     CARD32                      num_formats;

exa/exa.c

@@ -740,6 +740,11 @@ exaCloseScreen(ScreenPtr pScreen)
     ExaScreenPriv(pScreen);
     PictureScreenPtr ps = GetPictureScreenIfSet(pScreen);
 
+    /* doesn't matter which one actually was registered */
+    dixScreenUnhookPixmapDestroy(pScreen, exaPixmapDestroy_classic);
+    dixScreenUnhookPixmapDestroy(pScreen, exaPixmapDestroy_driver);
+    dixScreenUnhookPixmapDestroy(pScreen, exaPixmapDestroy_mixed);
+
     if (ps->Glyphs == exaGlyphs)
         exaGlyphsFini(pScreen);
 
@@ -753,8 +758,6 @@ exaCloseScreen(ScreenPtr pScreen)
     unwrap(pExaScr, pScreen, GetSpans);
     if (pExaScr->SavedCreatePixmap)
         unwrap(pExaScr, pScreen, CreatePixmap);
-    if (pExaScr->SavedDestroyPixmap)
-        unwrap(pExaScr, pScreen, DestroyPixmap);
     if (pExaScr->SavedModifyPixmapHeader)
         unwrap(pExaScr, pScreen, ModifyPixmapHeader);
     unwrap(pExaScr, pScreen, CopyWindow);
@@ -955,8 +958,9 @@ exaDriverInit(ScreenPtr pScreen, ExaDriverPtr pScreenInfo)
         }
         if (pExaScr->info->flags & EXA_HANDLES_PIXMAPS) {
             if (pExaScr->info->flags & EXA_MIXED_PIXMAPS) {
+                dixScreenHookPixmapDestroy(pScreen, exaPixmapDestroy_mixed);
+
                 wrap(pExaScr, pScreen, CreatePixmap, exaCreatePixmap_mixed);
-                wrap(pExaScr, pScreen, DestroyPixmap, exaDestroyPixmap_mixed);
                 wrap(pExaScr, pScreen, ModifyPixmapHeader,
                      exaModifyPixmapHeader_mixed);
                 wrap(pExaScr, pScreen, SharePixmapBacking, exaSharePixmapBacking_mixed);
@@ -969,8 +973,9 @@ exaDriverInit(ScreenPtr pScreen, ExaDriverPtr pScreenInfo)
                 pExaScr->prepare_access_reg = exaPrepareAccessReg_mixed;
             }
             else {
+                dixScreenHookPixmapDestroy(pScreen, exaPixmapDestroy_driver);
+
                 wrap(pExaScr, pScreen, CreatePixmap, exaCreatePixmap_driver);
-                wrap(pExaScr, pScreen, DestroyPixmap, exaDestroyPixmap_driver);
                 wrap(pExaScr, pScreen, ModifyPixmapHeader,
                      exaModifyPixmapHeader_driver);
                 pExaScr->do_migration = NULL;
@@ -981,8 +986,9 @@ exaDriverInit(ScreenPtr pScreen, ExaDriverPtr pScreenInfo)
             }
         }
         else {
+            dixScreenHookPixmapDestroy(pScreen, exaPixmapDestroy_classic);
+
             wrap(pExaScr, pScreen, CreatePixmap, exaCreatePixmap_classic);
-            wrap(pExaScr, pScreen, DestroyPixmap, exaDestroyPixmap_classic);
             wrap(pExaScr, pScreen, ModifyPixmapHeader,
                  exaModifyPixmapHeader_classic);
             pExaScr->do_migration = exaDoMigration_classic;

exa/exa_classic.c

@@ -206,18 +206,11 @@ exaModifyPixmapHeader_classic(PixmapPtr pPixmap, int width, int height,
     return ret;
 }
 
-Bool
-exaDestroyPixmap_classic(PixmapPtr pPixmap)
+void exaPixmapDestroy_classic(CallbackListPtr *pcbl, ScreenPtr pScreen, PixmapPtr pPixmap)
 {
-    ScreenPtr pScreen = pPixmap->drawable.pScreen;
-
-    ExaScreenPriv(pScreen);
-    Bool ret = TRUE;
-
-    if (pPixmap->refcnt == 1) {
     ExaPixmapPriv(pPixmap);
     if (!pExaPixmap) // we're called on an error path
-            goto out;
+        return;
 
     exaDestroyPixmap(pPixmap);
 
@@ -235,15 +228,6 @@ exaDestroyPixmap_classic(PixmapPtr pPixmap)
     RegionUninit(&pExaPixmap->validFB);
 }
 
-out:
-    // restore original (screen driver's) DestroyPixmap() handler and call it
-    swap(pExaScr, pScreen, DestroyPixmap);
-    dixDestroyPixmap(pPixmap, 0);
-    swap(pExaScr, pScreen, DestroyPixmap);
-
-    return ret;
-}
-
 Bool
 exaPixmapHasGpuCopy_classic(PixmapPtr pPixmap)
 {

exa/exa_driver.c

@@ -185,18 +185,13 @@ exaModifyPixmapHeader_driver(PixmapPtr pPixmap, int width, int height,
     return ret;
 }
 
-Bool
-exaDestroyPixmap_driver(PixmapPtr pPixmap)
+void exaPixmapDestroy_driver(CallbackListPtr *pcbl, ScreenPtr pScreen, PixmapPtr pPixmap)
 {
-    ScreenPtr pScreen = pPixmap->drawable.pScreen;
-
     ExaScreenPriv(pScreen);
-    Bool ret = TRUE;
 
-    if (pPixmap->refcnt == 1) {
     ExaPixmapPriv(pPixmap);
     if (!pExaPixmap) // we're called on an error path
-            goto out;
+        return;
 
     exaDestroyPixmap(pPixmap);
 
@@ -205,15 +200,6 @@ exaDestroyPixmap_driver(PixmapPtr pPixmap)
     pExaPixmap->driverPriv = NULL;
 }
 
-out:
-    // restore original (screen driver's) DestroyPixmap() handler and call it
-    swap(pExaScr, pScreen, DestroyPixmap);
-    dixDestroyPixmap(pPixmap, 0);
-    swap(pExaScr, pScreen, DestroyPixmap);
-
-    return ret;
-}
-
 Bool
 exaPixmapHasGpuCopy_driver(PixmapPtr pPixmap)
 {

exa/exa_mixed.c

@@ -239,18 +239,13 @@ exaModifyPixmapHeader_mixed(PixmapPtr pPixmap, int width, int height, int depth,
     return ret;
 }
 
-Bool
-exaDestroyPixmap_mixed(PixmapPtr pPixmap)
+void exaPixmapDestroy_mixed(CallbackListPtr *pcbl, ScreenPtr pScreen, PixmapPtr pPixmap)
 {
-    ScreenPtr pScreen = pPixmap->drawable.pScreen;
-
     ExaScreenPriv(pScreen);
-    Bool ret = TRUE;
 
-    if (pPixmap->refcnt == 1) {
     ExaPixmapPriv(pPixmap);
-        if (!pExaPixmap)
-            goto out; // we're called on an error path
+    if (!pExaPixmap) // we're called on an error path
+        return;
 
     exaDestroyPixmap(pPixmap);
 
@@ -268,15 +263,6 @@ exaDestroyPixmap_mixed(PixmapPtr pPixmap)
     }
 }
 
-out:
-    // restore original (screen driver's) DestroyPixmap() handler and call it
-    swap(pExaScr, pScreen, DestroyPixmap);
-    dixDestroyPixmap(pPixmap, 0);
-    swap(pExaScr, pScreen, DestroyPixmap);
-
-    return ret;
-}
-
 Bool
 exaPixmapHasGpuCopy_mixed(PixmapPtr pPixmap)
 {

exa/exa_priv.h

@@ -156,7 +156,6 @@ typedef struct {
     GetImageProcPtr SavedGetImage;
     GetSpansProcPtr SavedGetSpans;
     CreatePixmapProcPtr SavedCreatePixmap;
-    DestroyPixmapProcPtr SavedDestroyPixmap;
     CopyWindowProcPtr SavedCopyWindow;
     ChangeWindowAttributesProcPtr SavedChangeWindowAttributes;
     BitmapToRegionProcPtr SavedBitmapToRegion;
@@ -590,8 +589,7 @@ exaModifyPixmapHeader_classic(PixmapPtr pPixmap, int width, int height,
                               int depth, int bitsPerPixel, int devKind,
                               void *pPixData);
 
-Bool
- exaDestroyPixmap_classic(PixmapPtr pPixmap);
+void exaPixmapDestroy_classic(CallbackListPtr *pcbl, ScreenPtr pScreen, PixmapPtr pPixmap);
 
 Bool
  exaPixmapHasGpuCopy_classic(PixmapPtr pPixmap);
@@ -608,8 +606,7 @@ exaModifyPixmapHeader_driver(PixmapPtr pPixmap, int width, int height,
                              int depth, int bitsPerPixel, int devKind,
                              void *pPixData);
 
-Bool
- exaDestroyPixmap_driver(PixmapPtr pPixmap);
+void exaPixmapDestroy_driver(CallbackListPtr *pcbl, ScreenPtr pScreen, PixmapPtr pPixmap);
 
 Bool
  exaPixmapHasGpuCopy_driver(PixmapPtr pPixmap);
@@ -625,8 +622,7 @@ Bool
 exaModifyPixmapHeader_mixed(PixmapPtr pPixmap, int width, int height, int depth,
                             int bitsPerPixel, int devKind, void *pPixData);
 
-Bool
- exaDestroyPixmap_mixed(PixmapPtr pPixmap);
+void exaPixmapDestroy_mixed(CallbackListPtr *pcbl, ScreenPtr pScreen, PixmapPtr pPixmap);
 
 Bool
  exaPixmapHasGpuCopy_mixed(PixmapPtr pPixmap);

fb/fb.h

@@ -842,6 +842,12 @@ fbPolyFillRect(DrawablePtr pDrawable,
 
 #define fbFillPolygon miFillPolygon
 
+#define fbSetShape miSetShape
+
+#define fbMoveWindow miMoveWindow
+
+#define fbModifyPixmapHeader miModifyPixmapHeader
+
 /*
  * fbfillsp.c
  */

glamor/glamor.c

@@ -604,6 +604,11 @@ glamor_setup_formats(ScreenPtr screen)
     glamor_priv->cbcr_format.texture_only = FALSE;
 }
 
+static void glamor_pixmap_destroy(CallbackListPtr *pcbl, ScreenPtr pScreen, PixmapPtr pPixmap)
+{
+    glamor_pixmap_destroy_fbo(pPixmap);
+}
+
 /** Set up glamor for an already-configured GL context. */
 Bool
 glamor_init(ScreenPtr screen, unsigned int flags)
@@ -652,8 +657,7 @@ glamor_init(ScreenPtr screen, unsigned int flags)
     glamor_priv->saved_procs.close_screen = screen->CloseScreen;
     screen->CloseScreen = glamor_close_screen;
 
-    glamor_priv->saved_procs.destroy_pixmap = screen->DestroyPixmap;
-    screen->DestroyPixmap = glamor_destroy_pixmap;
+    dixScreenHookPixmapDestroy(screen, glamor_pixmap_destroy);
 
     /* If we are using egl screen, call egl screen init to
      * register correct close screen function. */
@@ -879,7 +883,7 @@ glamor_init(ScreenPtr screen, unsigned int flags)
  fail:
     /* Restore default CloseScreen and DestroyPixmap handlers */
     screen->CloseScreen = glamor_priv->saved_procs.close_screen;
-    screen->DestroyPixmap = glamor_priv->saved_procs.destroy_pixmap;
+    dixScreenUnhookPixmapDestroy(screen, glamor_pixmap_destroy);
 
  free_glamor_private:
     free(glamor_priv);
@@ -913,9 +917,10 @@ glamor_close_screen(ScreenPtr screen)
     glamor_set_glvnd_vendor(screen, NULL);
     screen->CloseScreen = glamor_priv->saved_procs.close_screen;
 
+    dixScreenUnhookPixmapDestroy(screen, glamor_pixmap_destroy);
+
     screen->CreateGC = glamor_priv->saved_procs.create_gc;
     screen->CreatePixmap = glamor_priv->saved_procs.create_pixmap;
-    screen->DestroyPixmap = glamor_priv->saved_procs.destroy_pixmap;
     screen->GetSpans = glamor_priv->saved_procs.get_spans;
     screen->ChangeWindowAttributes =
         glamor_priv->saved_procs.change_window_attributes;

glamor/glamor_egl.c

@@ -62,7 +62,6 @@ struct glamor_egl_screen_private {
     Bool force_vendor; /* if GLVND vendor is forced from options */
 
     CloseScreenProcPtr saved_close_screen;
-    DestroyPixmapProcPtr saved_destroy_pixmap;
     xf86FreeScreenProc *saved_free_screen;
 };
 
@@ -756,17 +755,13 @@ glamor_egl_get_driver_name(ScreenPtr screen)
     return NULL;
 }
 
-
-static Bool
-glamor_egl_destroy_pixmap(PixmapPtr pixmap)
+static void glamor_egl_pixmap_destroy(CallbackListPtr *pcbl, ScreenPtr pScreen, PixmapPtr pixmap)
 {
     ScreenPtr screen = pixmap->drawable.pScreen;
     ScrnInfoPtr scrn = xf86ScreenToScrn(screen);
     struct glamor_egl_screen_private *glamor_egl =
         glamor_egl_get_screen_private(scrn);
-    Bool ret = TRUE;
 
-    if (pixmap->refcnt == 1) {
     struct glamor_pixmap_private *pixmap_priv =
         glamor_get_pixmap_private(pixmap);
 
@@ -774,15 +769,6 @@ glamor_egl_destroy_pixmap(PixmapPtr pixmap)
         eglDestroyImageKHR(glamor_egl->display, pixmap_priv->image);
 }
 
-    screen->DestroyPixmap = glamor_egl->saved_destroy_pixmap;
-    if (screen->DestroyPixmap)
-        ret = screen->DestroyPixmap(pixmap);
-    glamor_egl->saved_destroy_pixmap = screen->DestroyPixmap;
-    screen->DestroyPixmap = glamor_egl_destroy_pixmap;
-
-    return ret;
-}
-
 void
 glamor_egl_exchange_buffers(PixmapPtr front, PixmapPtr back)
 {
@@ -822,6 +808,7 @@ glamor_egl_close_screen(ScreenPtr screen)
     eglDestroyImageKHR(glamor_egl->display, pixmap_priv->image);
     pixmap_priv->image = NULL;
 
+    dixScreenUnhookPixmapDestroy(screen, glamor_egl_pixmap_destroy);
     screen->CloseScreen = glamor_egl->saved_close_screen;
 
     return screen->CloseScreen(screen);
@@ -907,8 +894,7 @@ glamor_egl_screen_init(ScreenPtr screen, struct glamor_context *glamor_ctx)
     glamor_egl->saved_close_screen = screen->CloseScreen;
     screen->CloseScreen = glamor_egl_close_screen;
 
-    glamor_egl->saved_destroy_pixmap = screen->DestroyPixmap;
-    screen->DestroyPixmap = glamor_egl_destroy_pixmap;
+    dixScreenHookPixmapDestroy(screen, glamor_egl_pixmap_destroy);
 
     glamor_ctx->ctx = glamor_egl->context;
     glamor_ctx->display = glamor_egl->display;

glamor/glamor_priv.h

@@ -209,7 +209,6 @@ struct glamor_saved_procs {
     CloseScreenProcPtr close_screen;
     CreateGCProcPtr create_gc;
     CreatePixmapProcPtr create_pixmap;
-    DestroyPixmapProcPtr destroy_pixmap;
     GetSpansProcPtr get_spans;
     GetImageProcPtr get_image;
     CompositeProcPtr composite;

hw/kdrive/src/kxv.c

@@ -82,9 +82,10 @@ static int KdXVPutImage(DrawablePtr, XvPortPtr, GCPtr,
 static int KdXVQueryImageAttributes(XvPortPtr, XvImagePtr,
                                     CARD16 *, CARD16 *, int *, int *);
 
+static void KdXVWindowDestroy(CallbackListPtr *pcbl, ScreenPtr pScreen, WindowPtr pWin);
+
 /* ScreenRec fields */
 
-static Bool KdXVDestroyWindow(WindowPtr pWin);
 static void KdXVWindowExposures(WindowPtr pWin, RegionPtr r1);
 static void KdXVClipNotify(WindowPtr pWin, int dx, int dy);
 static Bool KdXVCloseScreen(ScreenPtr);
@@ -139,14 +140,14 @@ KdXVScreenInit(ScreenPtr pScreen, KdVideoAdaptorPtr adaptors, int num)
     if (!ScreenPriv)
         return FALSE;
 
-    ScreenPriv->DestroyWindow = pScreen->DestroyWindow;
+    dixScreenHookWindowDestroy(pScreen, KdXVWindowDestroy);
+
     ScreenPriv->WindowExposures = pScreen->WindowExposures;
     ScreenPriv->ClipNotify = pScreen->ClipNotify;
     ScreenPriv->CloseScreen = pScreen->CloseScreen;
 
 /*   fprintf(stderr,"XV: Wrapping screen funcs\n"); */
 
-    pScreen->DestroyWindow = KdXVDestroyWindow;
     pScreen->WindowExposures = KdXVWindowExposures;
     pScreen->ClipNotify = KdXVClipNotify;
     pScreen->CloseScreen = KdXVCloseScreen;
@@ -755,13 +756,10 @@ KdXVRemovePortFromWindow(WindowPtr pWin, XvPortRecPrivatePtr portPriv)
 
 /****  ScreenRec fields ****/
 
-static Bool
-KdXVDestroyWindow(WindowPtr pWin)
+static void
+KdXVWindowDestroy(CallbackListPtr *pcbl, ScreenPtr pScreen, WindowPtr pWin)
 {
-    ScreenPtr pScreen = pWin->drawable.pScreen;
-    KdXVScreenPtr ScreenPriv = GET_KDXV_SCREEN(pScreen);
     KdXVWindowPtr tmp, WinPriv = GET_KDXV_WINDOW(pWin);
-    int ret;
 
     while (WinPriv) {
         XvPortRecPrivatePtr pPriv = WinPriv->PortRec;
@@ -779,12 +777,6 @@ KdXVDestroyWindow(WindowPtr pWin)
     }
 
     dixSetPrivate(&pWin->devPrivates, KdXVWindowKey, NULL);
-
-    pScreen->DestroyWindow = ScreenPriv->DestroyWindow;
-    ret = (*pScreen->DestroyWindow) (pWin);
-    pScreen->DestroyWindow = KdXVDestroyWindow;
-
-    return ret;
 }
 
 static void
@@ -919,7 +911,6 @@ KdXVCloseScreen(ScreenPtr pScreen)
     if (!ScreenPriv)
         return TRUE;
 
-    pScreen->DestroyWindow = ScreenPriv->DestroyWindow;
     pScreen->WindowExposures = ScreenPriv->WindowExposures;
     pScreen->ClipNotify = ScreenPriv->ClipNotify;
     pScreen->CloseScreen = ScreenPriv->CloseScreen;

hw/kdrive/src/kxv.h

@@ -151,7 +151,6 @@ Bool
 /*** These are DDX layer privates ***/
 
 typedef struct {
-    DestroyWindowProcPtr DestroyWindow;
     ClipNotifyProcPtr ClipNotify;
     WindowExposuresProcPtr WindowExposures;
     CloseScreenProcPtr CloseScreen;

hw/xfree86/common/xf86xv.c

@@ -81,9 +81,10 @@ static int xf86XVPutImage(DrawablePtr, XvPortPtr, GCPtr,
 static int xf86XVQueryImageAttributes(XvPortPtr, XvImagePtr,
                                       CARD16 *, CARD16 *, int *, int *);
 
+static void xf86XVWindowDestroy(CallbackListPtr *pcbl, ScreenPtr pScreen, WindowPtr pWin);
+
 /* ScreenRec fields */
 
-static Bool xf86XVDestroyWindow(WindowPtr pWin);
 static void xf86XVWindowExposures(WindowPtr pWin, RegionPtr r1);
 static void xf86XVPostValidateTree(WindowPtr pWin, WindowPtr pLayerWin,
                                    VTKind kind);
@@ -253,7 +254,6 @@ xf86XVScreenInit(ScreenPtr pScreen, XF86VideoAdaptorPtr * adaptors, int num)
 
     pScrn = xf86ScreenToScrn(pScreen);
 
-    ScreenPriv->DestroyWindow = pScreen->DestroyWindow;
     ScreenPriv->WindowExposures = pScreen->WindowExposures;
     ScreenPriv->PostValidateTree = PostValidateTreeUndefined;
     ScreenPriv->ClipNotify = pScreen->ClipNotify;
@@ -263,7 +263,6 @@ xf86XVScreenInit(ScreenPtr pScreen, XF86VideoAdaptorPtr * adaptors, int num)
     ScreenPriv->AdjustFrame = pScrn->AdjustFrame;
     ScreenPriv->ModeSet = pScrn->ModeSet;
 
-    pScreen->DestroyWindow = xf86XVDestroyWindow;
     pScreen->WindowExposures = xf86XVWindowExposures;
     pScreen->ClipNotify = xf86XVClipNotify;
     pScreen->CloseScreen = xf86XVCloseScreen;
@@ -991,13 +990,10 @@ xf86XVReputOrStopAllPorts(ScrnInfoPtr pScrn, Bool onlyChanged)
 
 /****  ScreenRec fields ****/
 
-static Bool
-xf86XVDestroyWindow(WindowPtr pWin)
+static void
+xf86XVWindowDestroy(CallbackListPtr *pcbl, ScreenPtr pScreen, WindowPtr pWin)
 {
-    ScreenPtr pScreen = pWin->drawable.pScreen;
-    XF86XVScreenPtr ScreenPriv = GET_XF86XV_SCREEN(pScreen);
     XF86XVWindowPtr tmp, WinPriv = GET_XF86XV_WINDOW(pWin);
-    int ret;
 
     while (WinPriv) {
         XvPortRecPrivatePtr pPriv = WinPriv->PortRec;
@@ -1015,12 +1011,6 @@ xf86XVDestroyWindow(WindowPtr pWin)
     }
 
     dixSetPrivate(&pWin->devPrivates, XF86XVWindowKey, NULL);
-
-    pScreen->DestroyWindow = ScreenPriv->DestroyWindow;
-    ret = (*pScreen->DestroyWindow) (pWin);
-    pScreen->DestroyWindow = xf86XVDestroyWindow;
-
-    return ret;
 }
 
 static void
@@ -1148,7 +1138,8 @@ xf86XVCloseScreen(ScreenPtr pScreen)
     if (!ScreenPriv)
         return TRUE;
 
-    pScreen->DestroyWindow = ScreenPriv->DestroyWindow;
+    dixScreenUnhookWindowDestroy(pScreen, xf86XVWindowDestroy);
+
     pScreen->WindowExposures = ScreenPriv->WindowExposures;
     pScreen->ClipNotify = ScreenPriv->ClipNotify;
     pScreen->CloseScreen = ScreenPriv->CloseScreen;

hw/xfree86/common/xf86xvpriv.h

@@ -1,4 +1,3 @@
-
 /*
  * Copyright (c) 2003 by The XFree86 Project, Inc.
  *
@@ -37,7 +36,6 @@
 extern _X_EXPORT DevPrivateKey XF86XvScreenKey;
 
 typedef struct {
-    DestroyWindowProcPtr DestroyWindow;
     ClipNotifyProcPtr ClipNotify;
     WindowExposuresProcPtr WindowExposures;
     PostValidateTreeProcPtr PostValidateTree;

hw/xfree86/dri/dri.c

@@ -634,7 +634,7 @@ DRIScreenInit(ScreenPtr pScreen, DRIInfoPtr pDRIInfo, int *pDRMFD)
     return TRUE;
 }
 
-static Bool DRIDestroyWindow(WindowPtr pWin);
+static void DRIWindowDestroy(CallbackListPtr *pcbl, ScreenPtr pScreen, WindowPtr pWin);
 
 Bool
 DRIFinishScreenInit(ScreenPtr pScreen)
@@ -648,8 +648,7 @@ DRIFinishScreenInit(ScreenPtr pScreen)
         pScreen->WindowExposures = pDRIInfo->wrap.WindowExposures;
     }
 
-    pDRIPriv->DestroyWindow = pScreen->DestroyWindow;
-    pScreen->DestroyWindow = DRIDestroyWindow;
+    dixScreenHookWindowDestroy(pScreen, DRIWindowDestroy);
 
     pDRIPriv->xf86_crtc_notify = xf86_wrap_crtc_notify(pScreen,
                                                        dri_crtc_notify);
@@ -696,11 +695,8 @@ DRICloseScreen(ScreenPtr pScreen)
                 pScreen->WindowExposures = pDRIPriv->wrap.WindowExposures;
                 pDRIPriv->wrap.WindowExposures = NULL;
             }
-            if (pDRIPriv->DestroyWindow) {
-                pScreen->DestroyWindow = pDRIPriv->DestroyWindow;
-                pDRIPriv->DestroyWindow = NULL;
-            }
 
+            dixScreenUnhookWindowDestroy(pScreen, DRIWindowDestroy);
             xf86_unwrap_crtc_notify(pScreen, pDRIPriv->xf86_crtc_notify);
 
             if (pDRIInfo->wrap.CopyWindow) {
@@ -1922,29 +1918,9 @@ DRITreeTraversal(WindowPtr pWin, void *data)
     return WT_WALKCHILDREN;
 }
 
-static Bool
-DRIDestroyWindow(WindowPtr pWin)
+static void DRIWindowDestroy(CallbackListPtr *pcbl, ScreenPtr pScreen, WindowPtr pWin)
 {
-    ScreenPtr pScreen = pWin->drawable.pScreen;
-    DRIScreenPrivPtr pDRIPriv = DRI_SCREEN_PRIV(pScreen);
-    Bool retval = TRUE;
-
     DRIDrawablePrivDestroy(pWin);
-
-    /* call lower wrapped functions */
-    if (pDRIPriv->DestroyWindow) {
-        /* unwrap */
-        pScreen->DestroyWindow = pDRIPriv->DestroyWindow;
-
-        /* call lower layers */
-        retval = (*pScreen->DestroyWindow) (pWin);
-
-        /* rewrap */
-        pDRIPriv->DestroyWindow = pScreen->DestroyWindow;
-        pScreen->DestroyWindow = DRIDestroyWindow;
-    }
-
-    return retval;
 }
 
 void

hw/xfree86/dri/dristruct.h

@@ -90,7 +90,6 @@ typedef struct _DRIScreenPrivRec {
     DrawablePtr fullscreen;     /* pointer to fullscreen drawable */
     drm_clip_rect_t fullscreen_rect;    /* fake rect for fullscreen mode */
     DRIWrappedFuncsRec wrap;
-    DestroyWindowProcPtr DestroyWindow;
     DrawablePtr DRIDrawables[SAREA_MAX_DRAWABLES];
     DRIContextPrivPtr dummyCtxPriv;     /* Pointer to dummy context */
     Bool createDummyCtx;

hw/xwayland/xwayland-screen.c

@@ -1135,8 +1135,7 @@ xwl_screen_init(ScreenPtr pScreen, int argc, char **argv)
     xwl_screen->UnrealizeWindow = pScreen->UnrealizeWindow;
     pScreen->UnrealizeWindow = xwl_unrealize_window;
 
-    xwl_screen->DestroyWindow = pScreen->DestroyWindow;
-    pScreen->DestroyWindow = xwl_destroy_window;
+    dixScreenHookWindowDestroy(pScreen, xwl_window_destroy);
 
     xwl_screen->CloseScreen = pScreen->CloseScreen;
     pScreen->CloseScreen = xwl_close_screen;

hw/xwayland/xwayland-screen.h

@@ -74,7 +74,6 @@ struct xwl_screen {
     ConfigNotifyProcPtr ConfigNotify;
     RealizeWindowProcPtr RealizeWindow;
     UnrealizeWindowProcPtr UnrealizeWindow;
-    DestroyWindowProcPtr DestroyWindow;
     XYToWindowProcPtr XYToWindow;
     SetWindowPixmapProcPtr SetWindowPixmap;
     ChangeWindowAttributesProcPtr ChangeWindowAttributes;

hw/xwayland/xwayland-window.c

@@ -1939,31 +1939,17 @@ xwl_window_create_frame_callback(struct xwl_window *xwl_window)
         xwl_present_for_each_frame_callback(xwl_window, xwl_present_reset_timer);
 }
 
-Bool
-xwl_destroy_window(WindowPtr window)
+void
+xwl_window_destroy(CallbackListPtr *pcbl, ScreenPtr pScreen, WindowPtr window)
 {
-    ScreenPtr screen = window->drawable.pScreen;
-    struct xwl_screen *xwl_screen = xwl_screen_get(screen);
+    struct xwl_screen *xwl_screen = xwl_screen_get(pScreen);
     struct xwl_window *xwl_window = xwl_window_get(window);
-    Bool ret;
 
     if (xwl_screen->present)
         xwl_present_cleanup(window);
 
     if (xwl_window)
         xwl_window_dispose(xwl_window);
-
-    screen->DestroyWindow = xwl_screen->DestroyWindow;
-
-    if (screen->DestroyWindow)
-        ret = screen->DestroyWindow (window);
-    else
-        ret = TRUE;
-
-    xwl_screen->DestroyWindow = screen->DestroyWindow;
-    screen->DestroyWindow = xwl_destroy_window;
-
-    return ret;
 }
 
 static Bool

hw/xwayland/xwayland-window.h

@@ -146,7 +146,7 @@ void xwl_move_window(WindowPtr window,
                      int x, int y,
                      WindowPtr next_sib,
                      VTKind kind);
-Bool xwl_destroy_window(WindowPtr window);
+void xwl_window_destroy(CallbackListPtr *pcbl, ScreenPtr pScreen, WindowPtr window);
 void xwl_window_post_damage(struct xwl_window *xwl_window);
 void xwl_window_create_frame_callback(struct xwl_window *xwl_window);
 void xwl_window_surface_do_destroy(struct xwl_wl_surface *xwl_wl_surface);

hw/xwin/glx/indirect.c

@@ -373,8 +373,6 @@ static __GLXdrawable *glxWinCreateDrawable(ClientPtr client,
                                            int type,
                                            XID glxDrawId, __GLXconfig * conf);
 
-static Bool glxWinRealizeWindow(WindowPtr pWin);
-static Bool glxWinUnrealizeWindow(WindowPtr pWin);
 static void glxWinCopyWindow(WindowPtr pWindow, DDXPointRec ptOldOrg,
                              RegionPtr prgnSrc);
 static Bool glxWinSetPixelFormat(HDC hdc, int bppOverride, int drawableTypeOverride,
@@ -704,11 +702,7 @@ glxWinScreenProbe(ScreenPtr pScreen)
     // dump out fbConfigs now fbConfigIds and visualIDs have been assigned
     fbConfigsDump(screen->base.numFBConfigs, screen->base.fbconfigs, &rejects);
 
-    /* Wrap RealizeWindow, UnrealizeWindow and CopyWindow on this screen */
-    screen->RealizeWindow = pScreen->RealizeWindow;
-    pScreen->RealizeWindow = glxWinRealizeWindow;
-    screen->UnrealizeWindow = pScreen->UnrealizeWindow;
-    pScreen->UnrealizeWindow = glxWinUnrealizeWindow;
+    /* Wrap CopyWindow on this screen */
     screen->CopyWindow = pScreen->CopyWindow;
     pScreen->CopyWindow = glxWinCopyWindow;
 
@@ -730,23 +724,6 @@ glxWinScreenProbe(ScreenPtr pScreen)
  * Window functions
  */
 
-static Bool
-glxWinRealizeWindow(WindowPtr pWin)
-{
-    Bool result;
-    ScreenPtr pScreen = pWin->drawable.pScreen;
-    glxWinScreen *screenPriv = (glxWinScreen *) glxGetScreen(pScreen);
-
-    GLWIN_DEBUG_MSG("glxWinRealizeWindow");
-
-    /* Allow the window to be created (RootlessRealizeWindow is inside our wrap) */
-    pScreen->RealizeWindow = screenPriv->RealizeWindow;
-    result = pScreen->RealizeWindow(pWin);
-    pScreen->RealizeWindow = glxWinRealizeWindow;
-
-    return result;
-}
-
 static void
 glxWinCopyWindow(WindowPtr pWindow, DDXPointRec ptOldOrg, RegionPtr prgnSrc)
 {
@@ -778,22 +755,6 @@ glxWinCopyWindow(WindowPtr pWindow, DDXPointRec ptOldOrg, RegionPtr prgnSrc)
     pScreen->CopyWindow = glxWinCopyWindow;
 }
 
-static Bool
-glxWinUnrealizeWindow(WindowPtr pWin)
-{
-    Bool result;
-    ScreenPtr pScreen = pWin->drawable.pScreen;
-    glxWinScreen *screenPriv = (glxWinScreen *) glxGetScreen(pScreen);
-
-    GLWIN_DEBUG_MSG("glxWinUnrealizeWindow");
-
-    pScreen->UnrealizeWindow = screenPriv->UnrealizeWindow;
-    result = pScreen->UnrealizeWindow(pWin);
-    pScreen->UnrealizeWindow = glxWinUnrealizeWindow;
-
-    return result;
-}
-
 /* ---------------------------------------------------------------------- */
 /*
  * Drawable functions

hw/xwin/glx/indirect.h

@@ -72,8 +72,6 @@ struct __GLXWinScreen {
     Bool has_WGL_ARB_framebuffer_sRGB;
 
     /* wrapped screen functions */
-    RealizeWindowProcPtr RealizeWindow;
-    UnrealizeWindowProcPtr UnrealizeWindow;
     CopyWindowProcPtr CopyWindow;
 };
 

hw/xwin/win.h

@@ -485,7 +485,6 @@ typedef struct _winPrivScreenRec {
     winInitVisualsProcPtr pwinInitVisuals;
     winAdjustVideoModeProcPtr pwinAdjustVideoMode;
     winCreateBoundingWindowProcPtr pwinCreateBoundingWindow;
-    winFinishScreenInitProcPtr pwinFinishScreenInit;
     winBltExposedRegionsProcPtr pwinBltExposedRegions;
     winBltExposedWindowRegionProcPtr pwinBltExposedWindowRegion;
     winActivateAppProcPtr pwinActivateApp;
@@ -500,23 +499,10 @@ typedef struct _winPrivScreenRec {
     winCreateScreenResourcesProc pwinCreateScreenResources;
 
     /* Window Procedures for Rootless mode */
-    CreateWindowProcPtr CreateWindow;
-    DestroyWindowProcPtr DestroyWindow;
-    PositionWindowProcPtr PositionWindow;
-    ChangeWindowAttributesProcPtr ChangeWindowAttributes;
-    RealizeWindowProcPtr RealizeWindow;
-    UnrealizeWindowProcPtr UnrealizeWindow;
     ValidateTreeProcPtr ValidateTree;
     PostValidateTreeProcPtr PostValidateTree;
-    CopyWindowProcPtr CopyWindow;
     ClearToBackgroundProcPtr ClearToBackground;
     ClipNotifyProcPtr ClipNotify;
-    RestackWindowProcPtr RestackWindow;
-    ReparentWindowProcPtr ReparentWindow;
-    ResizeWindowProcPtr ResizeWindow;
-    MoveWindowProcPtr MoveWindow;
-    SetShapeProcPtr SetShape;
-    ModifyPixmapHeaderProcPtr ModifyPixmapHeader;
 
     winCursorRec cursor;
 
@@ -831,9 +817,6 @@ void
 Bool
  winScreenInit(ScreenPtr pScreen, int argc, char **argv);
 
-Bool
- winFinishScreenInitFB(int i, ScreenPtr pScreen, int argc, char **argv);
-
 /*
  * winshadddnl.c
  */
@@ -925,19 +908,9 @@ void
  winReorderWindowsMultiWindow(void);
 
 void
-
-winResizeWindowMultiWindow(WindowPtr pWin, int x, int y, unsigned int w,
-                           unsigned int h, WindowPtr pSib);
-void
-
 winMoveWindowMultiWindow(WindowPtr pWin, int x, int y,
                          WindowPtr pSib, VTKind kind);
 
-void
-
-winCopyWindowMultiWindow(WindowPtr pWin, DDXPointRec oldpt,
-                         RegionPtr oldRegion);
-
 PixmapPtr
 winCreatePixmapMultiwindow(ScreenPtr pScreen, int width, int height, int depth,
                            unsigned usage_hint);

hw/xwin/winmultiwindowshape.c

@@ -33,6 +33,8 @@
 #include <xwin-config.h>
 #endif
 
+#include "mi/mi_priv.h"
+
 #include "win.h"
 
 /*
@@ -50,9 +52,7 @@ winSetShapeMultiWindow(WindowPtr pWin, int kind)
     ErrorF("winSetShapeMultiWindow - pWin: %p kind: %i\n", pWin, kind);
 #endif
 
-    WIN_UNWRAP(SetShape);
-    (*pScreen->SetShape) (pWin, kind);
-    WIN_WRAP(SetShape, winSetShapeMultiWindow);
+    fbSetShape(pWin, kind);
 
     /* Update the Windows window's shape */
     winReshapeMultiWindow(pWin);

hw/xwin/winmultiwindowwindow.c

@@ -36,6 +36,8 @@
 #include <xwin-config.h>
 #endif
 
+#include "mi/mi_priv.h"
+
 #include "win.h"
 #include "dixevents.h"
 #include "winmultiwindowclass.h"
@@ -109,9 +111,7 @@ winCreateWindowMultiWindow(WindowPtr pWin)
     winTrace("winCreateWindowMultiWindow - pWin: %p\n", pWin);
 #endif
 
-    WIN_UNWRAP(CreateWindow);
-    fResult = (*pScreen->CreateWindow) (pWin);
-    WIN_WRAP(CreateWindow, winCreateWindowMultiWindow);
+    fbCreateWindow(pWin);
 
     /* Initialize some privates values */
     pWinPriv->hRgn = NULL;
@@ -142,9 +142,7 @@ winDestroyWindowMultiWindow(WindowPtr pWin)
     ErrorF("winDestroyWindowMultiWindow - pWin: %p\n", pWin);
 #endif
 
-    WIN_UNWRAP(DestroyWindow);
-    fResult = (*pScreen->DestroyWindow) (pWin);
-    WIN_WRAP(DestroyWindow, winDestroyWindowMultiWindow);
+    fbDestroyWindow(pWin);
 
     /* Flag that the window has been destroyed */
     pWinPriv->fXKilled = TRUE;
@@ -188,9 +186,7 @@ winPositionWindowMultiWindow(WindowPtr pWin, int x, int y)
     winTrace("winPositionWindowMultiWindow - pWin: %p\n", pWin);
 #endif
 
-    WIN_UNWRAP(PositionWindow);
-    fResult = (*pScreen->PositionWindow) (pWin, x, y);
-    WIN_WRAP(PositionWindow, winPositionWindowMultiWindow);
+    fbPositionWindow(pWin, x, y);
 
 #if ENABLE_DEBUG
     ErrorF("winPositionWindowMultiWindow: (x, y) = (%d, %d)\n", x, y);
@@ -291,9 +287,7 @@ winChangeWindowAttributesMultiWindow(WindowPtr pWin, unsigned long mask)
     ErrorF("winChangeWindowAttributesMultiWindow - pWin: %p\n", pWin);
 #endif
 
-    WIN_UNWRAP(ChangeWindowAttributes);
-    fResult = (*pScreen->ChangeWindowAttributes) (pWin, mask);
-    WIN_WRAP(ChangeWindowAttributes, winChangeWindowAttributesMultiWindow);
+    fbChangeWindowAttributes(pWin, mask);
 
     /*
      * NOTE: We do not currently need to do anything here.
@@ -320,9 +314,7 @@ winUnmapWindowMultiWindow(WindowPtr pWin)
     ErrorF("winUnmapWindowMultiWindow - pWin: %p\n", pWin);
 #endif
 
-    WIN_UNWRAP(UnrealizeWindow);
-    fResult = (*pScreen->UnrealizeWindow) (pWin);
-    WIN_WRAP(UnrealizeWindow, winUnmapWindowMultiWindow);
+    fbUnrealizeWindow(pWin);
 
     /* Flag that the window has been killed */
     pWinPriv->fXKilled = TRUE;
@@ -351,9 +343,7 @@ winMapWindowMultiWindow(WindowPtr pWin)
     ErrorF("winMapWindowMultiWindow - pWin: %p\n", pWin);
 #endif
 
-    WIN_UNWRAP(RealizeWindow);
-    fResult = (*pScreen->RealizeWindow) (pWin);
-    WIN_WRAP(RealizeWindow, winMapWindowMultiWindow);
+    fbRealizeWindow(pWin);
 
     /* Flag that this window has not been destroyed */
     pWinPriv->fXKilled = FALSE;
@@ -385,11 +375,6 @@ winReparentWindowMultiWindow(WindowPtr pWin, WindowPtr pPriorParent)
          pPriorParent, (unsigned int)pPriorParent->drawable.id,
          pWin->parent, (unsigned int)pWin->parent->drawable.id);
 
-    WIN_UNWRAP(ReparentWindow);
-    if (pScreen->ReparentWindow)
-        (*pScreen->ReparentWindow) (pWin, pPriorParent);
-    WIN_WRAP(ReparentWindow, winReparentWindowMultiWindow);
-
     /* Update the Windows window associated with this X window */
     winUpdateWindowsWindow(pWin);
 }
@@ -415,11 +400,6 @@ winRestackWindowMultiWindow(WindowPtr pWin, WindowPtr pOldNextSib)
     winTrace("winRestackMultiWindow - %p\n", pWin);
 #endif
 
-    WIN_UNWRAP(RestackWindow);
-    if (pScreen->RestackWindow)
-        (*pScreen->RestackWindow) (pWin, pOldNextSib);
-    WIN_WRAP(RestackWindow, winRestackWindowMultiWindow);
-
 #if 1
     /*
      * Calling winReorderWindowsMultiWindow here means our window manager
@@ -799,24 +779,6 @@ winReorderWindowsMultiWindow(void)
     fRestacking = FALSE;
 }
 
-/*
- * CopyWindow - See Porting Layer Definition - p. 39
- */
-void
-winCopyWindowMultiWindow(WindowPtr pWin, DDXPointRec oldpt, RegionPtr oldRegion)
-{
-    ScreenPtr pScreen = pWin->drawable.pScreen;
-
-    winScreenPriv(pScreen);
-
-#if ENABLE_DEBUG
-    ErrorF("CopyWindowMultiWindow\n");
-#endif
-    WIN_UNWRAP(CopyWindow);
-    (*pScreen->CopyWindow) (pWin, oldpt, oldRegion);
-    WIN_WRAP(CopyWindow, winCopyWindowMultiWindow);
-}
-
 /*
  * MoveWindow - See Porting Layer Definition - p. 42
  */
@@ -832,28 +794,7 @@ winMoveWindowMultiWindow(WindowPtr pWin, int x, int y,
     ErrorF("MoveWindowMultiWindow to (%d, %d)\n", x, y);
 #endif
 
-    WIN_UNWRAP(MoveWindow);
-    (*pScreen->MoveWindow) (pWin, x, y, pSib, kind);
-    WIN_WRAP(MoveWindow, winMoveWindowMultiWindow);
-}
-
-/*
- * ResizeWindow - See Porting Layer Definition - p. 42
- */
-void
-winResizeWindowMultiWindow(WindowPtr pWin, int x, int y, unsigned int w,
-                           unsigned int h, WindowPtr pSib)
-{
-    ScreenPtr pScreen = pWin->drawable.pScreen;
-
-    winScreenPriv(pScreen);
-
-#if ENABLE_DEBUG
-    ErrorF("ResizeWindowMultiWindow to (%d, %d) - %dx%d\n", x, y, w, h);
-#endif
-    WIN_UNWRAP(ResizeWindow);
-    (*pScreen->ResizeWindow) (pWin, x, y, w, h, pSib);
-    WIN_WRAP(ResizeWindow, winResizeWindowMultiWindow);
+    fbMoveWindow(pWin, x, y, pSib, kind);
 }
 
 /*
@@ -1153,7 +1094,6 @@ winModifyPixmapHeaderMultiwindow(PixmapPtr pPixmap,
 {
     int i;
     winPrivPixmapPtr pPixmapPriv = winGetPixmapPriv(pPixmap);
-    Bool fResult;
 
     /* reinitialize everything */
     pPixmap->drawable.depth = depth;
@@ -1204,13 +1144,5 @@ winModifyPixmapHeaderMultiwindow(PixmapPtr pPixmap,
 
     winDebug("winModifyPixmapHeaderMultiwindow: falling back\n");
 
-    {
-        ScreenPtr pScreen = pPixmap->drawable.pScreen;
-        winScreenPriv(pScreen);
-        WIN_UNWRAP(ModifyPixmapHeader);
-        fResult = (*pScreen->ModifyPixmapHeader) (pPixmap, width, height, depth, bitsPerPixel, devKind, pPixData);
-        WIN_WRAP(ModifyPixmapHeader, winModifyPixmapHeaderMultiwindow);
-    }
-
-    return fResult;
+    return fbModifyPixmapHeader(pPixmap, width, height, depth, bitsPerPixel, devKind, pPixData);
 }

hw/xwin/winscrinit.c

@@ -38,6 +38,8 @@
 #include "win.h"
 #include "winmsg.h"
 
+static Bool winFinishScreenInitFB(int i, ScreenPtr pScreen, int argc, char **argv);
+
 /*
  * Determine what type of screen we are initializing
  * and call the appropriate procedure to initialize
@@ -165,9 +167,8 @@ winScreenInit(ScreenPtr pScreen, int argc, char **argv)
     /* Clear the visuals list */
     miClearVisualTypes();
 
-    /* Call the engine dependent screen initialization procedure */
-    if (!((*pScreenPriv->pwinFinishScreenInit) (pScreen->myNum, pScreen, argc, argv))) {
-        ErrorF("winScreenInit - winFinishScreenInit () failed\n");
+    if (!winFinishScreenInitFB(pScreen->myNum, pScreen, argc, argv)) {
+        ErrorF("%s(): winFinishScreenInitFB () failed\n", __FUNCTION__);
 
         /* call the engine dependent screen close procedure to clean up from a failure */
         pScreenPriv->pwinCloseScreen(pScreen);
@@ -221,7 +222,7 @@ winCreateScreenResources(ScreenPtr pScreen)
 }
 
 /* See Porting Layer Definition - p. 20 */
-Bool
+static Bool
 winFinishScreenInitFB(int i, ScreenPtr pScreen, int argc, char **argv)
 {
     winScreenPriv(pScreen);
@@ -376,15 +377,6 @@ winFinishScreenInitFB(int i, ScreenPtr pScreen, int argc, char **argv)
         pScreenPriv->a = NULL; \
     }
 
-        /* Save a pointer to each lower-level window procedure */
-        WRAP(CreateWindow);
-        WRAP(DestroyWindow);
-        WRAP(RealizeWindow);
-        WRAP(UnrealizeWindow);
-        WRAP(PositionWindow);
-        WRAP(ChangeWindowAttributes);
-        WRAP(SetShape);
-
         /* Assign rootless window procedures to be top level procedures */
         pScreen->CreateWindow = winCreateWindowRootless;
         pScreen->DestroyWindow = winDestroyWindowRootless;
@@ -409,21 +401,6 @@ winFinishScreenInitFB(int i, ScreenPtr pScreen, int argc, char **argv)
         pScreenPriv->a = NULL; \
     }
 
-        /* Save a pointer to each lower-level window procedure */
-        WRAP(CreateWindow);
-        WRAP(DestroyWindow);
-        WRAP(RealizeWindow);
-        WRAP(UnrealizeWindow);
-        WRAP(PositionWindow);
-        WRAP(ChangeWindowAttributes);
-        WRAP(ReparentWindow);
-        WRAP(RestackWindow);
-        WRAP(ResizeWindow);
-        WRAP(MoveWindow);
-        WRAP(CopyWindow);
-        WRAP(SetShape);
-        WRAP(ModifyPixmapHeader);
-
         /* Assign multi-window window procedures to be top level procedures */
         pScreen->CreateWindow = winCreateWindowMultiWindow;
         pScreen->DestroyWindow = winDestroyWindowMultiWindow;
@@ -433,9 +410,7 @@ winFinishScreenInitFB(int i, ScreenPtr pScreen, int argc, char **argv)
         pScreen->UnrealizeWindow = winUnmapWindowMultiWindow;
         pScreen->ReparentWindow = winReparentWindowMultiWindow;
         pScreen->RestackWindow = winRestackWindowMultiWindow;
-        pScreen->ResizeWindow = winResizeWindowMultiWindow;
         pScreen->MoveWindow = winMoveWindowMultiWindow;
-        pScreen->CopyWindow = winCopyWindowMultiWindow;
         pScreen->SetShape = winSetShapeMultiWindow;
 
         if (pScreenInfo->fCompositeWM) {

hw/xwin/winshadddnl.c

@@ -1193,7 +1193,6 @@ winSetEngineFunctionsShadowDDNL(ScreenPtr pScreen)
             winCreateBoundingWindowFullScreen;
     else
         pScreenPriv->pwinCreateBoundingWindow = winCreateBoundingWindowWindowed;
-    pScreenPriv->pwinFinishScreenInit = winFinishScreenInitFB;
     pScreenPriv->pwinBltExposedRegions = winBltExposedRegionsShadowDDNL;
     pScreenPriv->pwinBltExposedWindowRegion = NULL;
     pScreenPriv->pwinActivateApp = winActivateAppShadowDDNL;

hw/xwin/winshadgdi.c

@@ -1265,7 +1265,6 @@ winSetEngineFunctionsShadowGDI(ScreenPtr pScreen)
             winCreateBoundingWindowFullScreen;
     else
         pScreenPriv->pwinCreateBoundingWindow = winCreateBoundingWindowWindowed;
-    pScreenPriv->pwinFinishScreenInit = winFinishScreenInitFB;
     pScreenPriv->pwinBltExposedRegions = winBltExposedRegionsShadowGDI;
     pScreenPriv->pwinBltExposedWindowRegion = winBltExposedWindowRegionShadowGDI;
     pScreenPriv->pwinActivateApp = winActivateAppShadowGDI;

hw/xwin/winwindow.c

@@ -32,6 +32,9 @@
 #ifdef HAVE_XWIN_CONFIG_H
 #include <xwin-config.h>
 #endif
+
+#include "mi/mi_priv.h"
+
 #include "win.h"
 
 /*
@@ -65,9 +68,7 @@ winCreateWindowRootless(WindowPtr pWin)
     winTrace("winCreateWindowRootless (%p)\n", pWin);
 #endif
 
-    WIN_UNWRAP(CreateWindow);
-    fResult = (*pScreen->CreateWindow) (pWin);
-    WIN_WRAP(CreateWindow, winCreateWindowRootless);
+    fResult = fbCreateWindow(pWin);
 
     pWinPriv->hRgn = NULL;
 
@@ -90,9 +91,7 @@ winDestroyWindowRootless(WindowPtr pWin)
     winTrace("winDestroyWindowRootless (%p)\n", pWin);
 #endif
 
-    WIN_UNWRAP(DestroyWindow);
-    fResult = (*pScreen->DestroyWindow) (pWin);
-    WIN_WRAP(DestroyWindow, winDestroyWindowRootless);
+    fbDestroyWindow(pWin);
 
     if (pWinPriv->hRgn != NULL) {
         DeleteObject(pWinPriv->hRgn);
@@ -119,9 +118,7 @@ winPositionWindowRootless(WindowPtr pWin, int x, int y)
     winTrace("winPositionWindowRootless (%p)\n", pWin);
 #endif
 
-    WIN_UNWRAP(PositionWindow);
-    fResult = (*pScreen->PositionWindow) (pWin, x, y);
-    WIN_WRAP(PositionWindow, winPositionWindowRootless);
+    fbPositionWindow(pWin, x, y);
 
     winUpdateRgnRootless(pWin);
 
@@ -143,9 +140,7 @@ winChangeWindowAttributesRootless(WindowPtr pWin, unsigned long mask)
     winTrace("winChangeWindowAttributesRootless (%p)\n", pWin);
 #endif
 
-    WIN_UNWRAP(ChangeWindowAttributes);
-    fResult = (*pScreen->ChangeWindowAttributes) (pWin, mask);
-    WIN_WRAP(ChangeWindowAttributes, winChangeWindowAttributesRootless);
+    fbChangeWindowAttributes(pWin, mask);
 
     winUpdateRgnRootless(pWin);
 
@@ -169,9 +164,7 @@ winUnmapWindowRootless(WindowPtr pWin)
     winTrace("winUnmapWindowRootless (%p)\n", pWin);
 #endif
 
-    WIN_UNWRAP(UnrealizeWindow);
-    fResult = (*pScreen->UnrealizeWindow) (pWin);
-    WIN_WRAP(UnrealizeWindow, winUnmapWindowRootless);
+    fbUnrealizeWindow(pWin);
 
     if (pWinPriv->hRgn != NULL) {
         DeleteObject(pWinPriv->hRgn);
@@ -199,9 +192,7 @@ winMapWindowRootless(WindowPtr pWin)
     winTrace("winMapWindowRootless (%p)\n", pWin);
 #endif
 
-    WIN_UNWRAP(RealizeWindow);
-    fResult = (*pScreen->RealizeWindow) (pWin);
-    WIN_WRAP(RealizeWindow, winMapWindowRootless);
+    fbRealizeWindow(pWin);
 
     winReshapeRootless(pWin);
 
@@ -221,9 +212,7 @@ winSetShapeRootless(WindowPtr pWin, int kind)
     winTrace("winSetShapeRootless (%p, %i)\n", pWin, kind);
 #endif
 
-    WIN_UNWRAP(SetShape);
-    (*pScreen->SetShape) (pWin, kind);
-    WIN_WRAP(SetShape, winSetShapeRootless);
+    fbSetShape(pWin, kind);
 
     winReshapeRootless(pWin);
     winUpdateRgnRootless(pWin);

include/dix_screen_hooks.h

@@ -0,0 +1,178 @@
+/* SPDX-License-Identifier: MIT OR X11
+ *
+ * Copyright © 2024 Enrico Weigelt, metux IT consult <info@metux.net>
+ *
+ * @brief exported API entry points for hooking into screen operations
+ *
+ * These hooks are replacing the old, complicated approach of wrapping
+ * ScreenRec's proc vectors. Unlike the wrapping, these hooks are designed
+ * to be safe against changes in setup/teardown order and are called
+ * independently of the ScreenProc call vectors. It is guaranteed that the
+ * objects to operate on already/still exist (eg. destructors are callled
+ * before the object is actually destroyed, while post-create hooks are
+ * called after the object is created)
+ *
+ * Main consumers are extensions that need to associate extra data or
+ * doing other things additional to the original operation. In some cases
+ * they might even be used in drivers (in order to split device specific
+ * from generic logic)
+ */
+#ifndef DIX_SCREEN_HOOKS_H
+#define DIX_SCREEN_HOOKS_H
+
+#include <X11/Xfuncproto.h>
+
+#include "include/callback.h"
+
+#include "screenint.h" /* ScreenPtr */
+#include "window.h" /* WindowPtr */
+
+/* prototype of a window destructor */
+typedef void (*XorgScreenWindowDestroyProcPtr)(CallbackListPtr *pcbl,
+                                               ScreenPtr pScreen,
+                                               WindowPtr pWindow);
+
+/**
+ * @brief register a window on the given screen
+ *
+ * @param pScreen pointer to the screen to register the destructor into
+ * @param func pointer to the window destructor function
+ * @param arg opaque pointer passed to the destructor
+ *
+ * Window destructors are the replacement for fragile and complicated wrapping of
+ * pScreen->DestroyWindow(): extensions can safely register there custom destructors
+ * here, without ever caring about anybody else.
+ +
+ * The destructors are run right before pScreen->DestroyWindow() - when the window
+ * is already removed from hierarchy (thus cannot receive any events anymore) and
+ * most of it's data already destroyed - and supposed to do necessary per-extension
+ * cleanup duties. Their execution order is *unspecified*.
+ *
+ * Screen drivers (DDX'es, xf86 video drivers, ...) shall not use these, but still
+ * set the pScreen->DestroyWindow pointer - and these should be the *only* ones
+ * ever setting it.
+ *
+ * When registration fails, the server aborts.
+ *
+ **/
+_X_EXPORT void dixScreenHookWindowDestroy(ScreenPtr pScreen,
+                                          XorgScreenWindowDestroyProcPtr func);
+
+/**
+ * @brief unregister a window destructor on the given screen
+ *
+ * @param pScreen pointer to the screen to unregister the destructor from
+ * @param func pointer to the window destructor function
+ * @param arg opaque pointer passed to the destructor
+ *
+ * @see dixScreenHookWindowDestroy
+ *
+ * Unregister a window destructor hook registered via @ref dixScreenHookWindowDestroy
+ **/
+_X_EXPORT void dixScreenUnhookWindowDestroy(ScreenPtr pScreen,
+                                            XorgScreenWindowDestroyProcPtr func);
+
+typedef struct {
+    WindowPtr window;
+    int32_t x;
+    int32_t y;
+} XorgScreenWindowPositionParamRec;
+
+/* prototype of a window move notification handler */
+typedef void (*XorgScreenWindowPositionProcPtr)(CallbackListPtr *pcbl,
+                                                ScreenPtr pScreen,
+                                                XorgScreenWindowPositionParamRec *param);
+
+/**
+ * @brief register a position notify hook on the given screen
+ *
+ * @param pScreen pointer to the screen to register the notify hook into
+ * @param func pointer to the window hook function
+ * @param arg opaque pointer passed to the hook
+ *
+ * When registration fails, the server aborts.
+ *
+ **/
+_X_EXPORT void dixScreenHookWindowPosition(ScreenPtr pScreen,
+                                           XorgScreenWindowPositionProcPtr func);
+
+/**
+ * @brief unregister a window position notify hook on the given screen
+ *
+ * @param pScreen pointer to the screen to unregister the hook from
+ * @param func pointer to the hook function
+ * @param arg opaque pointer passed to the destructor
+ *
+ * @see dixScreenHookWindowPosition
+ *
+ * Unregister a window position notify hook registered via @ref dixScreenHookWindowPosition
+ **/
+_X_EXPORT void dixScreenUnhookWindowPosition(ScreenPtr pScreen,
+                                             XorgScreenWindowPositionProcPtr func);
+
+/* prototype of screen close notification handler */
+typedef void (*XorgScreenCloseProcPtr)(CallbackListPtr *pcbl,
+                                       ScreenPtr pScreen,
+                                       void *unused);
+
+/**
+ * @brief register a screen close notify hook on the given screen
+ *
+ * @param pScreen pointer to the screen to register the notify hook into
+ * @param func pointer to the hook function
+ *
+ * When registration fails, the server aborts.
+ *
+ **/
+_X_EXPORT void dixScreenHookClose(ScreenPtr pScreen,
+                                  XorgScreenCloseProcPtr func);
+
+/**
+ * @brief unregister a screen close notify hook on the given screen
+ *
+ * @param pScreen pointer to the screen to unregister the hook from
+ * @param func pointer to the hook function
+ * @param arg opaque pointer passed to the destructor
+ *
+ * @see dixScreenHookClose
+ *
+ * Unregister a screen close notify hook registered via @ref dixScreenHookClose
+ **/
+_X_EXPORT void dixScreenUnhookClose(ScreenPtr pScreen,
+                                    XorgScreenCloseProcPtr func);
+
+/* prototype of pixmap destroy notification handler */
+typedef void (*XorgScreenPixmapDestroyProcPtr)(CallbackListPtr *pcbl,
+                                               ScreenPtr pScreen,
+                                               PixmapPtr pPixmap);
+
+/**
+ * @brief register a pixmap destroy hook on the given screen
+ *
+ * @param pScreen pointer to the screen to register the notify hook into
+ * @param func pointer to the hook function
+ * @param arg opaque pointer passed to the hook
+ *
+ * When registration fails, the server aborts.
+ * This hook is called only when the pixmap is really to be destroyed,
+ * (unlike ScreenRec->DestroyPixmap())
+ *
+ **/
+_X_EXPORT void dixScreenHookPixmapDestroy(ScreenPtr pScreen,
+                                          XorgScreenPixmapDestroyProcPtr func);
+
+/**
+ * @brief unregister a pixmap destroy notify hook on the given screen
+ *
+ * @param pScreen pointer to the screen to unregister the hook from
+ * @param func pointer to the hook function
+ * @param arg opaque pointer passed to the destructor
+ *
+ * @see dixScreenHookClose
+ *
+ * Unregister a screen close notify hook registered via @ref dixScreenHookPixmapDestroy
+ **/
+_X_EXPORT void dixScreenUnhookPixmapDestroy(ScreenPtr pScreen,
+                                            XorgScreenPixmapDestroyProcPtr func);
+
+#endif /* DIX_SCREEN_HOOKS_H */

include/meson.build

@@ -444,6 +444,7 @@ if with_dtrace
     dtrace_hdr += dtrace_header.process(dtrace_tmpl)
 endif
 
+# install SDK headers
 if build_xorg
     install_data(
         [
@@ -457,6 +458,7 @@ if build_xorg
             'cursor.h',
             'cursorstr.h',
             'dix.h',
+            'dix_screen_hooks.h',
             'dixaccess.h',
             'dixevents.h',
             'dixfont.h',

include/scrnintstr.h

@@ -57,6 +57,8 @@ SOFTWARE.
 #include "privates.h"
 #include <X11/extensions/randr.h>
 
+#include "dix_screen_hooks.h"
+
 typedef struct _PixmapFormat {
     unsigned char depth;
     unsigned char bitsPerPixel;
@@ -490,8 +492,17 @@ typedef void (*DPMSProcPtr)(ScreenPtr pScreen, int level);
     required. Unwrap occurs at the top of each function, just after
     entry, and Wrap occurs at the bottom of each function, just
     before returning.
+
+    DestroyWindow() should NOT be wrapped anymore
+    use dixScreenHookWindowDestroy() instead.
  */
 
+#define _SCREEN_HOOK_TYPE(NAME, FUNCTYPE, ARRSIZE) \
+    struct { \
+        FUNCTYPE func; \
+        void *arg; \
+    } NAME[ARRSIZE];
+
 typedef struct _Screen {
     int myNum;                  /* index of this instance in Screens[] */
     ATOM id;
@@ -658,6 +669,22 @@ typedef struct _Screen {
     ReplaceScanoutPixmapProcPtr ReplaceScanoutPixmap;
     XYToWindowProcPtr XYToWindow;
     DPMSProcPtr DPMS;
+
+    /* additional window destructors (replaces wrapping DestroyWindow).
+       should NOT be touched outside of DIX core */
+    CallbackListPtr hookWindowDestroy;
+
+    /* additional window position notify hooks (replaces wrapping PositionWindow)
+       should NOT be touched outside of DIX core */
+    CallbackListPtr hookWindowPosition;
+
+    /* additional screen close notify hooks (replaces wrapping CloseScreen)
+       should NOT be touched outside of DIX core */
+    CallbackListPtr hookClose;
+
+    /* additional pixmap destroy notify hooks (replaces wrapping DestroyPixmap)
+       should NOT be touched outside of DIX core */
+    CallbackListPtr hookPixmapDestroy;
 } ScreenRec;
 
 static inline RegionPtr

include/xorg-server.h.meson.in

@@ -214,4 +214,10 @@
 /* byte order */
 #mesondefine X_BYTE_ORDER
 
+/* announce server API features */
+#define XORG_API_DIX_SCREEN_HOOK_WINDOW_DESTROY 1
+#define XORG_API_DIX_SCREEN_HOOK_WINDOW_POSITION 1
+#define XORG_API_DIX_SCREEN_HOOK_CLOSE 1
+#define XORG_API_DIX_SCREEN_HOOK_PIXMAP_DESTROY 1
+
 #endif /* _XORG_SERVER_H_ */

mi/miwindow.c

@@ -50,6 +50,7 @@ SOFTWARE.
 #include <X11/extensions/shapeconst.h>
 
 #include "dix/cursor_priv.h"
+#include "dix/dix_priv.h"
 #include "dix/input_priv.h"
 #include "mi/mi_priv.h"
 
@@ -276,7 +277,7 @@ miMoveWindow(WindowPtr pWin, int x, int y, WindowPtr pNextSib, VTKind kind)
     SetWinSize(pWin);
     SetBorderSize(pWin);
 
-    (*pScreen->PositionWindow) (pWin, x, y);
+    dixScreenRaiseWindowPosition(pWin, x, y);
 
     windowToValidate = MoveWindowInStack(pWin, pNextSib);
 
@@ -446,7 +447,7 @@ miResizeWindow(WindowPtr pWin, int x, int y, unsigned int w, unsigned int h,
     ResizeChildrenWinSize(pWin, x - oldx, y - oldy, dw, dh);
 
     /* let the hardware adjust background and border pixmaps, if any */
-    (*pScreen->PositionWindow) (pWin, x, y);
+    dixScreenRaiseWindowPosition(pWin, x, y);
 
     pFirstChange = MoveWindowInStack(pWin, pSib);
 

miext/damage/damage.c

@@ -1484,14 +1484,8 @@ damageInsertDamage(DamagePtr * pPrev, DamagePtr pDamage)
     *pPrev = pDamage;
 }
 
-static Bool
-damageDestroyPixmap(PixmapPtr pPixmap)
+static void damagePixmapDestroy(CallbackListPtr *pcbl, ScreenPtr pScreen, PixmapPtr pPixmap)
 {
-    ScreenPtr pScreen = pPixmap->drawable.pScreen;
-
-    damageScrPriv(pScreen);
-
-    if (pPixmap->refcnt == 1) {
     DamagePtr *pPrev = getPixmapDamageRef(pPixmap);
     DamagePtr pDamage;
 
@@ -1501,12 +1495,6 @@ damageDestroyPixmap(PixmapPtr pPixmap)
             DamageDestroy(pDamage);
     }
 }
-    unwrap(pScrPriv, pScreen, DestroyPixmap);
-    if (pScreen->DestroyPixmap)
-        pScreen->DestroyPixmap(pPixmap);
-    wrap(pScrPriv, pScreen, DestroyPixmap, damageDestroyPixmap);
-    return TRUE;
-}
 
 static void
 damageCopyWindow(WindowPtr pWindow, DDXPointRec ptOldOrg, RegionPtr prgnSrc)
@@ -1576,22 +1564,14 @@ damageSetWindowPixmap(WindowPtr pWindow, PixmapPtr pPixmap)
     }
 }
 
-static Bool
-damageDestroyWindow(WindowPtr pWindow)
+static void
+damageWindowDestroy(CallbackListPtr *pcbl, ScreenPtr pScreen, WindowPtr pWindow)
 {
     DamagePtr pDamage;
-    ScreenPtr pScreen = pWindow->drawable.pScreen;
-    Bool ret;
-
-    damageScrPriv(pScreen);
 
     while ((pDamage = damageGetWinPriv(pWindow))) {
         DamageDestroy(pDamage);
     }
-    unwrap(pScrPriv, pScreen, DestroyWindow);
-    ret = (*pScreen->DestroyWindow) (pWindow);
-    wrap(pScrPriv, pScreen, DestroyWindow, damageDestroyWindow);
-    return ret;
 }
 
 static Bool
@@ -1599,7 +1579,9 @@ damageCloseScreen(ScreenPtr pScreen)
 {
     damageScrPriv(pScreen);
 
-    unwrap(pScrPriv, pScreen, DestroyPixmap);
+    dixScreenUnhookWindowDestroy(pScreen, damageWindowDestroy);
+    dixScreenUnhookPixmapDestroy(pScreen, damagePixmapDestroy);
+
     unwrap(pScrPriv, pScreen, CreateGC);
     unwrap(pScrPriv, pScreen, CopyWindow);
     unwrap(pScrPriv, pScreen, CloseScreen);
@@ -1691,9 +1673,10 @@ DamageSetup(ScreenPtr pScreen)
     pScrPriv->internalLevel = 0;
     pScrPriv->pScreenDamage = 0;
 
-    wrap(pScrPriv, pScreen, DestroyPixmap, damageDestroyPixmap);
+    dixScreenHookWindowDestroy(pScreen, damageWindowDestroy);
+    dixScreenHookPixmapDestroy(pScreen, damagePixmapDestroy);
+
     wrap(pScrPriv, pScreen, CreateGC, damageCreateGC);
-    wrap(pScrPriv, pScreen, DestroyWindow, damageDestroyWindow);
     wrap(pScrPriv, pScreen, SetWindowPixmap, damageSetWindowPixmap);
     wrap(pScrPriv, pScreen, CopyWindow, damageCopyWindow);
     wrap(pScrPriv, pScreen, CloseScreen, damageCloseScreen);

miext/damage/damagestr.h

@@ -63,9 +63,7 @@ typedef struct _damageScrPriv {
     CopyWindowProcPtr CopyWindow;
     CloseScreenProcPtr CloseScreen;
     CreateGCProcPtr CreateGC;
-    DestroyPixmapProcPtr DestroyPixmap;
     SetWindowPixmapProcPtr SetWindowPixmap;
-    DestroyWindowProcPtr DestroyWindow;
     CompositeProcPtr Composite;
     GlyphsProcPtr Glyphs;
     AddTrapsProcPtr AddTraps;

miext/rootless/rootlessCommon.h

@@ -84,7 +84,6 @@ typedef struct _RootlessScreenRec {
     CloseScreenProcPtr CloseScreen;
 
     CreateWindowProcPtr CreateWindow;
-    DestroyWindowProcPtr DestroyWindow;
     RealizeWindowProcPtr RealizeWindow;
     UnrealizeWindowProcPtr UnrealizeWindow;
     MoveWindowProcPtr MoveWindow;
@@ -92,7 +91,6 @@ typedef struct _RootlessScreenRec {
     RestackWindowProcPtr RestackWindow;
     ReparentWindowProcPtr ReparentWindow;
     ChangeBorderWidthProcPtr ChangeBorderWidth;
-    PositionWindowProcPtr PositionWindow;
     ChangeWindowAttributesProcPtr ChangeWindowAttributes;
     PaintWindowProcPtr PaintWindow;
 

miext/rootless/rootlessScreen.c

@@ -649,6 +649,9 @@ RootlessWrap(ScreenPtr pScreen)
 {
     RootlessScreenRec *s = SCREENREC(pScreen);
 
+    dixScreenHookWindowDestroy(pScreen, RootlessWindowDestroy);
+    dixScreenHookWindowPosition(pScreen, RootlessWindowPosition);
+
 #define WRAP(a) \
     if (pScreen->a) { \
         s->a = pScreen->a; \
@@ -666,11 +669,9 @@ RootlessWrap(ScreenPtr pScreen)
     WRAP(GetImage);
     WRAP(SourceValidate);
     WRAP(CreateWindow);
-    WRAP(DestroyWindow);
     WRAP(RealizeWindow);
     WRAP(UnrealizeWindow);
     WRAP(MoveWindow);
-    WRAP(PositionWindow);
     WRAP(ResizeWindow);
     WRAP(RestackWindow);
     WRAP(ReparentWindow);

miext/rootless/rootlessWindow.c

@@ -189,26 +189,16 @@ RootlessDestroyFrame(WindowPtr pWin, RootlessWindowPtr winRec)
 }
 
 /*
- * RootlessDestroyWindow
- *  Destroy the physical window associated with the given window.
+ * @brief window destructor: remove physical window associated with given window
  */
-Bool
-RootlessDestroyWindow(WindowPtr pWin)
+void
+RootlessWindowDestroy(CallbackListPtr *pcbl, ScreenPtr pScreen, WindowPtr pWin)
 {
     RootlessWindowRec *winRec = WINREC(pWin);
-    Bool result;
-
-    if (winRec != NULL) {
+    if (winRec != NULL)
         RootlessDestroyFrame(pWin, winRec);
 }
 
-    SCREEN_UNWRAP(pWin->drawable.pScreen, DestroyWindow);
-    result = pWin->drawable.pScreen->DestroyWindow(pWin);
-    SCREEN_WRAP(pWin->drawable.pScreen, DestroyWindow);
-
-    return result;
-}
-
 static Bool
 RootlessGetShape(WindowPtr pWin, RegionPtr pShape)
 {
@@ -313,20 +303,20 @@ RootlessChangeWindowAttributes(WindowPtr pWin, unsigned long vmask)
 }
 
 /*
- * RootlessPositionWindow
+ * @brief DIX move/resize hook
+ *
  * This is a hook for when DIX moves or resizes a window.
  * Update the frame position now although the physical window is moved
  * in RootlessMoveWindow. (x, y) are *inside* position. After this,
  * mi and fb are expecting the pixmap to be at the new location.
  */
-Bool
-RootlessPositionWindow(WindowPtr pWin, int x, int y)
+void RootlessWindowPosition(CallbackListPtr *pcbl, ScreenPtr pScreen, XorgScreenWindowPositionParamRec *param)
 {
-    ScreenPtr pScreen = pWin->drawable.pScreen;
+    WindowPtr pWin = param->window;
     RootlessWindowRec *winRec = WINREC(pWin);
-    Bool result;
 
-    RL_DEBUG_MSG("positionwindow start (win %p (%lu) @ %i, %i)\n", pWin, RootlessWID(pWin), x, y);
+    RL_DEBUG_MSG("positionwindow start (win %p (%lu) @ %i, %i)\n", pWin,
+                 RootlessWID(pWin), param->x, param->y);
 
     if (winRec) {
         if (winRec->is_drawing) {
@@ -334,16 +324,11 @@ RootlessPositionWindow(WindowPtr pWin, int x, int y)
             int bw = wBorderWidth(pWin);
 
             winRec->pixmap->devPrivate.ptr = winRec->pixelData;
-            SetPixmapBaseToScreen(winRec->pixmap, x - bw, y - bw);
+            SetPixmapBaseToScreen(winRec->pixmap, param->x - bw, param->y - bw);
         }
     }
 
-    SCREEN_UNWRAP(pScreen, PositionWindow);
-    result = pScreen->PositionWindow(pWin, x, y);
-    SCREEN_WRAP(pScreen, PositionWindow);
-
     RL_DEBUG_MSG("positionwindow end\n");
-    return result;
 }
 
 /*

miext/rootless/rootlessWindow.h

@@ -37,12 +37,12 @@
 #include "rootlessCommon.h"
 
 Bool RootlessCreateWindow(WindowPtr pWin);
-Bool RootlessDestroyWindow(WindowPtr pWin);
+void RootlessWindowDestroy(CallbackListPtr *pcbl, ScreenPtr pScreen, WindowPtr pWin, void *arg);
 
 void RootlessSetShape(WindowPtr pWin, int kind);
 
 Bool RootlessChangeWindowAttributes(WindowPtr pWin, unsigned long vmask);
-Bool RootlessPositionWindow(WindowPtr pWin, int x, int y);
+void RootlessWindowPosition(CallbackListPtr *pcbl, ScreenPtr pScreen, WindowPtr pWin, void *arg, int32_t x, int32_t y);
 Bool RootlessRealizeWindow(WindowPtr pWin);
 Bool RootlessUnrealizeWindow(WindowPtr pWin);
 void RootlessRestackWindow(WindowPtr pWin, WindowPtr pOldNextSib);

present/present_priv.h

@@ -165,7 +165,6 @@ struct present_screen_priv {
     ScreenPtr                   pScreen;
     CloseScreenProcPtr          CloseScreen;
     ConfigNotifyProcPtr         ConfigNotify;
-    DestroyWindowProcPtr        DestroyWindow;
     ClipNotifyProcPtr           ClipNotify;
 
     present_vblank_ptr          flip_pending;

present/present_screen.c

@@ -86,10 +86,9 @@ present_free_window_vblank(WindowPtr window)
 /*
  * Hook the close window function to clean up our window private
  */
-static Bool
-present_destroy_window(WindowPtr window)
+static void
+present_destroy_window(CallbackListPtr *pcbl, ScreenPtr pScreen, WindowPtr window)
 {
-    Bool ret;
     ScreenPtr screen = window->drawable.pScreen;
     present_screen_priv_ptr screen_priv = present_screen_priv(screen);
     present_window_priv_ptr window_priv = present_window_priv(window);
@@ -112,13 +111,6 @@ present_destroy_window(WindowPtr window)
 
         free(window_priv);
     }
-    unwrap(screen_priv, screen, DestroyWindow);
-    if (screen->DestroyWindow)
-        ret = screen->DestroyWindow (window);
-    else
-        ret = TRUE;
-    wrap(screen_priv, screen, DestroyWindow, present_destroy_window);
-    return ret;
 }
 
 /*
@@ -183,7 +175,9 @@ present_screen_priv_init(ScreenPtr screen)
         return NULL;
 
     wrap(screen_priv, screen, CloseScreen, present_close_screen);
-    wrap(screen_priv, screen, DestroyWindow, present_destroy_window);
+
+    dixScreenHookWindowDestroy(screen, present_destroy_window);
+
     wrap(screen_priv, screen, ConfigNotify, present_config_notify);
     wrap(screen_priv, screen, ClipNotify, present_clip_notify);
 

render/animcur.c

@@ -60,7 +60,6 @@ typedef struct _AnimCur {
 } AnimCurRec, *AnimCurPtr;
 
 typedef struct _AnimScrPriv {
-    CloseScreenProcPtr CloseScreen;
     CursorLimitsProcPtr CursorLimits;
     DisplayCursorProcPtr DisplayCursor;
     SetCursorPositionProcPtr SetCursorPosition;
@@ -84,13 +83,11 @@ static DevPrivateKeyRec AnimCurScreenPrivateKeyRec;
 #define Wrap(as,s,elt,func) (((as)->elt = (s)->elt), (s)->elt = func)
 #define Unwrap(as,s,elt)    ((s)->elt = (as)->elt)
 
-static Bool
-AnimCurCloseScreen(ScreenPtr pScreen)
+static void AnimCurScreenClose(CallbackListPtr *pcbl, ScreenPtr pScreen, void *unused)
 {
     AnimCurScreenPtr as = GetAnimCurScreen(pScreen);
-    Bool ret;
 
-    Unwrap(as, pScreen, CloseScreen);
+    dixScreenUnhookClose(pScreen, AnimCurScreenClose);
 
     Unwrap(as, pScreen, CursorLimits);
     Unwrap(as, pScreen, DisplayCursor);
@@ -98,8 +95,6 @@ AnimCurCloseScreen(ScreenPtr pScreen)
     Unwrap(as, pScreen, RealizeCursor);
     Unwrap(as, pScreen, UnrealizeCursor);
     Unwrap(as, pScreen, RecolorCursor);
-    ret = (*pScreen->CloseScreen) (pScreen);
-    return ret;
 }
 
 static void
@@ -286,7 +281,7 @@ AnimCurInit(ScreenPtr pScreen)
 
     as = GetAnimCurScreen(pScreen);
 
-    Wrap(as, pScreen, CloseScreen, AnimCurCloseScreen);
+    dixScreenHookClose(pScreen, AnimCurScreenClose);
 
     Wrap(as, pScreen, CursorLimits, AnimCurCursorLimits);
     Wrap(as, pScreen, DisplayCursor, AnimCurDisplayCursor);

render/picture.c

@@ -63,13 +63,10 @@ PictureWindowFormat(WindowPtr pWindow)
                               WindowGetVisual(pWindow));
 }
 
-static Bool
-PictureDestroyWindow(WindowPtr pWindow)
+static void
+picture_window_destructor(CallbackListPtr *pcbl, ScreenPtr pScreen, WindowPtr pWindow)
 {
-    ScreenPtr pScreen = pWindow->drawable.pScreen;
     PicturePtr pPicture;
-    PictureScreenPtr ps = GetPictureScreen(pScreen);
-    Bool ret;
 
     while ((pPicture = GetPictureWindow(pWindow))) {
         SetPictureWindow(pWindow, pPicture->pNext);
@@ -77,22 +74,13 @@ PictureDestroyWindow(WindowPtr pWindow)
             FreeResource(pPicture->id, PictureType);
         FreePicture((void *) pPicture, pPicture->id);
     }
-    pScreen->DestroyWindow = ps->DestroyWindow;
-    ret = (*pScreen->DestroyWindow) (pWindow);
-    ps->DestroyWindow = pScreen->DestroyWindow;
-    pScreen->DestroyWindow = PictureDestroyWindow;
-    return ret;
 }
 
-static Bool
-PictureCloseScreen(ScreenPtr pScreen)
+static void PictureScreenClose(CallbackListPtr *pcbl, ScreenPtr pScreen, void *unused)
 {
     PictureScreenPtr ps = GetPictureScreen(pScreen);
-    Bool ret;
     int n;
 
-    pScreen->CloseScreen = ps->CloseScreen;
-    ret = (*pScreen->CloseScreen) (pScreen);
     PictureResetFilters(pScreen);
     for (n = 0; n < ps->nformats; n++)
         if (ps->formats[n].type == PictTypeIndexed)
@@ -101,7 +89,7 @@ PictureCloseScreen(ScreenPtr pScreen)
     SetPictureScreen(pScreen, 0);
     free(ps->formats);
     free(ps);
-    return ret;
+    dixScreenUnhookClose(pScreen, PictureScreenClose);
 }
 
 static void
@@ -692,13 +680,12 @@ PictureInit(ScreenPtr pScreen, PictFormatPtr formats, int nformats)
 
     ps->subpixel = SubPixelUnknown;
 
-    ps->CloseScreen = pScreen->CloseScreen;
-    ps->DestroyWindow = pScreen->DestroyWindow;
     ps->StoreColors = pScreen->StoreColors;
-    pScreen->DestroyWindow = PictureDestroyWindow;
-    pScreen->CloseScreen = PictureCloseScreen;
     pScreen->StoreColors = PictureStoreColors;
 
+    dixScreenHookWindowDestroy(pScreen, picture_window_destructor);
+    dixScreenHookClose(pScreen, PictureScreenClose);
+
     if (!PictureSetDefaultFilters(pScreen)) {
         PictureResetFilters(pScreen);
         SetPictureScreen(pScreen, 0);

render/picturestr.h

@@ -294,9 +294,6 @@ typedef struct _PictureScreen {
     GlyphsProcPtr Glyphs;       /* unused */
     CompositeRectsProcPtr CompositeRects;
 
-    DestroyWindowProcPtr DestroyWindow;
-    CloseScreenProcPtr CloseScreen;
-
     StoreColorsProcPtr StoreColors;
 
     InitIndexedProcPtr InitIndexed;

xfixes/cursor.c

@@ -119,7 +119,6 @@ typedef struct _CursorHideCountRec {
 
 typedef struct _CursorScreen {
     DisplayCursorProcPtr DisplayCursor;
-    CloseScreenProcPtr CloseScreen;
     CursorHideCountPtr pCursorHideCounts;
 } CursorScreenRec, *CursorScreenPtr;
 
@@ -193,20 +192,15 @@ CursorDisplayCursor(DeviceIntPtr pDev, ScreenPtr pScreen, CursorPtr pCursor)
     return ret;
 }
 
-static Bool
-CursorCloseScreen(ScreenPtr pScreen)
+static void CursorScreenClose(CallbackListPtr *pcbl, ScreenPtr pScreen, void *unused)
 {
     CursorScreenPtr cs = GetCursorScreen(pScreen);
-    Bool ret;
-    _X_UNUSED CloseScreenProcPtr close_proc;
     _X_UNUSED DisplayCursorProcPtr display_proc;
 
-    Unwrap(cs, pScreen, CloseScreen, close_proc);
+    dixScreenUnhookClose(pScreen, CursorScreenClose);
     Unwrap(cs, pScreen, DisplayCursor, display_proc);
     deleteCursorHideCountsForScreen(pScreen);
-    ret = (*pScreen->CloseScreen) (pScreen);
     free(cs);
-    return ret;
 }
 
 #define CursorAllEvents (XFixesDisplayCursorNotifyMask)
@@ -1069,7 +1063,7 @@ XFixesCursorInit(void)
         cs = (CursorScreenPtr) calloc(1, sizeof(CursorScreenRec));
         if (!cs)
             return FALSE;
-        Wrap(cs, pScreen, CloseScreen, CursorCloseScreen);
+        dixScreenHookClose(pScreen, CursorScreenClose);
         Wrap(cs, pScreen, DisplayCursor, CursorDisplayCursor);
         cs->pCursorHideCounts = NULL;
         SetCursorScreen(pScreen, cs);