xserver git update 15/5/2010

1 files changed, 1679 insertions, 1685 deletions

diff --git a/xorg-server/dbe/dbe.c b/xorg-server/dbe/dbe.c
index 825d2e08f..a6c1c4f56 100644
--- a/xorg-server/dbe/dbe.c
+++ b/xorg-server/dbe/dbe.c
@@ -1,1685 +1,1679 @@
-/******************************************************************************
- * 
- * Copyright (c) 1994, 1995  Hewlett-Packard Company
- *
- * Permission is hereby granted, free of charge, to any person obtaining
- * a copy of this software and associated documentation files (the
- * "Software"), to deal in the Software without restriction, including
- * without limitation the rights to use, copy, modify, merge, publish,
- * distribute, sublicense, and/or sell copies of the Software, and to
- * permit persons to whom the Software is furnished to do so, subject to
- * the following conditions:
- * 
- * The above copyright notice and this permission notice shall be included
- * in all copies or substantial portions of the Software.
- * 
- * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
- * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
- * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
- * IN NO EVENT SHALL HEWLETT-PACKARD COMPANY BE LIABLE FOR ANY CLAIM,
- * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
- * OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR
- * THE USE OR OTHER DEALINGS IN THE SOFTWARE.
- * 
- * Except as contained in this notice, the name of the Hewlett-Packard
- * Company shall not be used in advertising or otherwise to promote the
- * sale, use or other dealings in this Software without prior written
- * authorization from the Hewlett-Packard Company.
- * 
- *     DIX DBE code
- *
- *****************************************************************************/
-
-
-/* INCLUDES */
-
-#ifdef HAVE_DIX_CONFIG_H
-#include <dix-config.h>
-#endif
-
-#include <string.h>
-#if HAVE_STDINT_H
-#include <stdint.h>
-#elif !defined(UINT32_MAX)
-#define UINT32_MAX 0xffffffffU
-#endif
-
-#include <X11/X.h>
-#include <X11/Xproto.h>
-#include "scrnintstr.h"
-#include "extnsionst.h"
-#include "gcstruct.h"
-#include "dixstruct.h"
-#define NEED_DBE_PROTOCOL
-#include "dbestruct.h"
-#include "midbe.h"
-#include "xace.h"
-
-/* GLOBALS */
-
-/* These are static globals copied to DBE's screen private for use by DDX */
-static int dbeScreenPrivKeyIndex;
-static DevPrivateKey dbeScreenPrivKey = &dbeScreenPrivKeyIndex;
-static int dbeWindowPrivKeyIndex;
-static DevPrivateKey dbeWindowPrivKey = &dbeWindowPrivKeyIndex;
-
-/* These are static globals copied to DBE's screen private for use by DDX */
-static RESTYPE	dbeDrawableResType;
-static RESTYPE	dbeWindowPrivResType;
-
-/* Used to generate DBE's BadBuffer error. */
-static int	dbeErrorBase;
-
-/******************************************************************************
- *
- * DBE DIX Procedure: DbeStubScreen
- *
- * Description:
- *
- *     This is function stubs the function pointers in the given DBE screen
- *     private and increments the number of stubbed screens.
- *
- *****************************************************************************/
-
-static void
-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;
-    pDbeScreenPriv->SwapBuffers         = NULL;
-    pDbeScreenPriv->BeginIdiom          = NULL;
-    pDbeScreenPriv->EndIdiom            = NULL;
-    pDbeScreenPriv->WinPrivDelete       = NULL;
-    pDbeScreenPriv->ResetProc           = NULL;
-
-    (*nStubbedScreens)++;
-
-} /* DbeStubScreen() */
-
-
-
-/******************************************************************************
- *
- * DBE DIX Procedure: ProcDbeGetVersion
- *
- * Description:
- *
- *     This function is for processing a DbeGetVersion request.
- *     This request returns the major and minor version numbers of this
- *     extension.
- *
- * Return Values:
- *
- *     Success
- *
- *****************************************************************************/
-
-static int
-ProcDbeGetVersion(ClientPtr client)
-{
-    /* REQUEST(xDbeGetVersionReq); */
-    xDbeGetVersionReply	rep;
-    register int	n;
-
-
-    REQUEST_SIZE_MATCH(xDbeGetVersionReq);
-
-    rep.type           = X_Reply;
-    rep.length         = 0;
-    rep.sequenceNumber = client->sequence;
-    rep.majorVersion   = DBE_MAJOR_VERSION;
-    rep.minorVersion   = DBE_MINOR_VERSION;
-
-    if (client->swapped)
-    {
-        swaps(&rep.sequenceNumber, n);
-    }
-
-    WriteToClient(client, sizeof(xDbeGetVersionReply), (char *)&rep);
-
-    return(client->noClientException);
-
-} /* ProcDbeGetVersion() */
-
-
-/******************************************************************************
- *
- * DBE DIX Procedure: ProcDbeAllocateBackBufferName
- *
- * Description:
- *
- *     This function is for processing a DbeAllocateBackBufferName request.
- *     This request allocates a drawable ID used to refer to the back buffer
- *     of a window.
- *
- * Return Values:
- *
- *     BadAlloc    - server can not allocate resources
- *     BadIDChoice - id is out of range for client; id is already in use
- *     BadMatch    - window is not an InputOutput window;
- *                   visual of window is not on list returned by
- *                   DBEGetVisualInfo; 
- *     BadValue    - invalid swap action is specified
- *     BadWindow   - window is not a valid window
- *     Success
- *
- *****************************************************************************/
-
-static int
-ProcDbeAllocateBackBufferName(ClientPtr client)
-{
-    REQUEST(xDbeAllocateBackBufferNameReq);
-    WindowPtr			pWin;
-    DbeScreenPrivPtr		pDbeScreenPriv;
-    DbeWindowPrivPtr		pDbeWindowPriv;
-    XdbeScreenVisualInfo	scrVisInfo;
-    register int		i;
-    Bool			visualMatched = FALSE;
-    xDbeSwapAction		swapAction;
-    VisualID			visual;
-    int				status;
-    int				add_index;
-
-
-    REQUEST_SIZE_MATCH(xDbeAllocateBackBufferNameReq);
-
-    /* The window must be valid. */
-    status = dixLookupWindow(&pWin, stuff->window, client, DixManageAccess);
-    if (status != Success)
-	return status;
-
-    /* The window must be InputOutput. */
-    if (pWin->drawable.class != InputOutput)
-    {
-	return(BadMatch);
-    }
-
-    /* The swap action must be valid. */
-    swapAction = stuff->swapAction;	/* use local var for performance. */
-    if ((swapAction != XdbeUndefined ) &&
-        (swapAction != XdbeBackground) &&
-        (swapAction != XdbeUntouched ) &&
-        (swapAction != XdbeCopied    ))
-    {
-        return(BadValue);
-    }
-
-    /* The id must be in range and not already in use. */
-    LEGAL_NEW_RESOURCE(stuff->buffer, client);
-
-    /* The visual of the window must be in the list returned by
-     * GetVisualInfo.
-     */
-    pDbeScreenPriv = DBE_SCREEN_PRIV_FROM_WINDOW(pWin);
-    if (!pDbeScreenPriv->GetVisualInfo)
-	return(BadMatch); /* screen doesn't support double buffering */
-
-    if (!(*pDbeScreenPriv->GetVisualInfo)(pWin->drawable.pScreen, &scrVisInfo))
-    {
-        /* GetVisualInfo() failed to allocate visual info data. */
-        return(BadAlloc);
-    }
-
-    /* See if the window's visual is on the list. */
-    visual = wVisual(pWin);
-    for (i = 0; (i < scrVisInfo.count) && !visualMatched; i++)
-    {
-        if (scrVisInfo.visinfo[i].visual == visual)
-	{
-	    visualMatched = TRUE;
-	}
-    }
-
-    /* Free what was allocated by the GetVisualInfo() call above. */
-    xfree(scrVisInfo.visinfo);
-
-    if (!visualMatched)
-    {
-	return(BadMatch);
-    }
-
-    if ((pDbeWindowPriv = DBE_WINDOW_PRIV(pWin)) == NULL)
-    {
-        /* There is no buffer associated with the window.
-         * Allocate a window priv.
-         */
-
-        pDbeWindowPriv = xcalloc(1, sizeof(DbeWindowPrivRec));
-	if (!pDbeWindowPriv)
-            return(BadAlloc);
-
-        /* Fill out window priv information. */
-        pDbeWindowPriv->pWindow      = pWin;
-        pDbeWindowPriv->width        = pWin->drawable.width;
-        pDbeWindowPriv->height       = pWin->drawable.height;
-        pDbeWindowPriv->x            = pWin->drawable.x;
-        pDbeWindowPriv->y            = pWin->drawable.y;
-        pDbeWindowPriv->nBufferIDs   = 0;
-
-        /* Set the buffer ID array pointer to the initial (static) array). */
-        pDbeWindowPriv->IDs = pDbeWindowPriv->initIDs;
-
-        /* Initialize the buffer ID list. */ 
-        pDbeWindowPriv->maxAvailableIDs = DBE_INIT_MAX_IDS;
-        pDbeWindowPriv->IDs[0] = stuff->buffer;
-
-        add_index = 0;
-        for (i = 0; i < DBE_INIT_MAX_IDS; i++)
-        {
-            pDbeWindowPriv->IDs[i] = DBE_FREE_ID_ELEMENT;
-        }
-
-        /* Actually connect the window priv to the window. */
-        dixSetPrivate(&pWin->devPrivates, dbeWindowPrivKey, pDbeWindowPriv);
-
-    } /* if -- There is no buffer associated with the window. */
-
-    else
-    {
-        /* A buffer is already associated with the window.
-         * Add the new buffer ID to the array, reallocating the array memory
-         * if necessary.
-         */
-
-        /* Determine if there is a free element in the ID array. */
-        for (i = 0; i < pDbeWindowPriv->maxAvailableIDs; i++)
-        {
-            if (pDbeWindowPriv->IDs[i] == DBE_FREE_ID_ELEMENT)
-            {
-                /* There is still room in the ID array. */
-                break;
-            }
-        }
- 
-        if (i == pDbeWindowPriv->maxAvailableIDs)
-        {
-            /* No more room in the ID array -- reallocate another array. */
-            XID	*pIDs;
-
-            /* Setup an array pointer for the realloc operation below. */
-            if (pDbeWindowPriv->maxAvailableIDs == DBE_INIT_MAX_IDS)
-            {
-                /* We will malloc a new array. */
-                pIDs = NULL;
-            }
-            else
-            {
-                /* We will realloc a new array. */
-                pIDs = pDbeWindowPriv->IDs;
-            }
-
-            /* malloc/realloc a new array and initialize all elements to 0. */
-            pDbeWindowPriv->IDs = (XID *)xrealloc(pIDs,
-                (pDbeWindowPriv->maxAvailableIDs+DBE_INCR_MAX_IDS)*sizeof(XID));
-            if (!pDbeWindowPriv->IDs)
-            {
-                return(BadAlloc);
-            }
-            memset(&pDbeWindowPriv->IDs[pDbeWindowPriv->nBufferIDs], 0,
-                   (pDbeWindowPriv->maxAvailableIDs + DBE_INCR_MAX_IDS -
-                    pDbeWindowPriv->nBufferIDs) * sizeof(XID));
-
-            if (pDbeWindowPriv->maxAvailableIDs == DBE_INIT_MAX_IDS)
-            {
-                /* We just went from using the initial (static) array to a
-                 * newly allocated array.  Copy the IDs from the initial array
-                 * to the new array.
-                 */
-                memcpy(pDbeWindowPriv->IDs, pDbeWindowPriv->initIDs,
-                       DBE_INIT_MAX_IDS * sizeof(XID));
-            }
-
-            pDbeWindowPriv->maxAvailableIDs += DBE_INCR_MAX_IDS;
-        }
-
-	add_index = i;
-
-    } /* else -- A buffer is already associated with the window. */
-
-
-    /* Call the DDX routine to allocate the back buffer. */
-    status = (*pDbeScreenPriv->AllocBackBufferName)(pWin, stuff->buffer,
-                                                    stuff->swapAction);
-
-    if (status == Success)
-    {
-	pDbeWindowPriv->IDs[add_index] = stuff->buffer;
-        if (!AddResource(stuff->buffer, dbeWindowPrivResType,
-                         (pointer)pDbeWindowPriv))
-	{
-            pDbeWindowPriv->IDs[add_index] = DBE_FREE_ID_ELEMENT;
-
-            if (pDbeWindowPriv->nBufferIDs == 0) {
-                status = BadAlloc;
-                goto out_free;
-            }
-        }
-    } else {
-        /* The DDX buffer allocation routine failed for the first buffer of
-         * this window.
-         */
-        if (pDbeWindowPriv->nBufferIDs == 0) {
-            goto out_free;
-        }
-    }
-
-    /* Increment the number of buffers (XIDs) associated with this window. */
-    pDbeWindowPriv->nBufferIDs++;
-
-    /* Set swap action on all calls. */
-    pDbeWindowPriv->swapAction = stuff->swapAction;
-
-    return(status);
-
-out_free:
-    dixSetPrivate(&pWin->devPrivates, dbeWindowPrivKey, NULL);
-    xfree(pDbeWindowPriv);
-    return (status);
-
-} /* ProcDbeAllocateBackBufferName() */
-
-
-/******************************************************************************
- *
- * DBE DIX Procedure: ProcDbeDeallocateBackBufferName
- *
- * Description:
- *
- *     This function is for processing a DbeDeallocateBackBufferName request.
- *     This request frees a drawable ID that was obtained by a
- *     DbeAllocateBackBufferName request.
- *
- * Return Values:
- *
- *     BadBuffer - buffer to deallocate is not associated with a window
- *     Success
- *
- *****************************************************************************/
-
-static int
-ProcDbeDeallocateBackBufferName(ClientPtr client)
-{
-    REQUEST(xDbeDeallocateBackBufferNameReq);
-    DbeWindowPrivPtr	pDbeWindowPriv;
-    int			rc, i;
-    pointer val;
-
-
-    REQUEST_SIZE_MATCH(xDbeDeallocateBackBufferNameReq);
-
-    /* Buffer name must be valid */
-    rc = dixLookupResourceByType((pointer *)&pDbeWindowPriv, stuff->buffer,
-				 dbeWindowPrivResType, client,
-				 DixDestroyAccess);
-    if (rc != Success)
-	return (rc == BadValue) ? dbeErrorBase + DbeBadBuffer : rc;
-
-    rc = dixLookupResourceByType(&val, stuff->buffer, dbeDrawableResType,
-				 client, DixDestroyAccess);
-    if (rc != Success)
-	return (rc == BadValue) ? dbeErrorBase + DbeBadBuffer : rc;
-
-    /* Make sure that the id is valid for the window.
-     * This is paranoid code since we already looked up the ID by type
-     * above.
-     */
-
-    for (i = 0; i < pDbeWindowPriv->nBufferIDs; i++)
-    {
-        /* Loop through the ID list to find the ID. */
-        if (pDbeWindowPriv->IDs[i] == stuff->buffer)
-        {
-            break;
-        }
-    }
-
-    if (i == pDbeWindowPriv->nBufferIDs)
-    {
-        /* We did not find the ID in the ID list. */
-        client->errorValue = stuff->buffer;
-        return(dbeErrorBase + DbeBadBuffer);
-    }
-
-    FreeResource(stuff->buffer, RT_NONE);
-
-    return(Success);
-
-} /* ProcDbeDeallocateBackBufferName() */
-
-
-/******************************************************************************
- *
- * DBE DIX Procedure: ProcDbeSwapBuffers
- *
- * Description:
- *
- *     This function is for processing a DbeSwapBuffers request.
- *     This request swaps the buffers for all windows listed, applying the
- *     appropriate swap action for each window.
- *
- * Return Values:
- *
- *     BadAlloc  - local allocation failed; this return value is not defined
- *                 by the protocol
- *     BadMatch  - a window in request is not double-buffered; a window in
- *                 request is listed more than once
- *     BadValue  - invalid swap action is specified; no swap action is
- *                 specified
- *     BadWindow - a window in request is not valid
- *     Success
- *
- *****************************************************************************/
-
-static int
-ProcDbeSwapBuffers(ClientPtr client)
-{
-    REQUEST(xDbeSwapBuffersReq);
-    WindowPtr		pWin;
-    DbeScreenPrivPtr	pDbeScreenPriv;
-    DbeSwapInfoPtr	swapInfo;
-    xDbeSwapInfo	*dbeSwapInfo;
-    int			error;
-    register int	i, j;
-    int			nStuff;
-
-
-    REQUEST_AT_LEAST_SIZE(xDbeSwapBuffersReq);
-    nStuff = stuff->n;	/* use local variable for performance. */
-
-    if (nStuff == 0)
-    {
-        return(Success);
-    }
-
-    if (nStuff > UINT32_MAX / sizeof(DbeSwapInfoRec))
-	    return BadAlloc;
-
-    /* Get to the swap info appended to the end of the request. */
-    dbeSwapInfo = (xDbeSwapInfo *)&stuff[1];
-
-    /* Allocate array to record swap information. */ 
-    swapInfo = (DbeSwapInfoPtr)Xalloc(nStuff * sizeof(DbeSwapInfoRec));
-    if (swapInfo == NULL)
-    {
-        return(BadAlloc);
-    }
-
-
-    for (i = 0; i < nStuff; i++)
-    {
-        /* Check all windows to swap. */
-
-        /* Each window must be a valid window - BadWindow. */
-	error = dixLookupWindow(&pWin, dbeSwapInfo[i].window, client,
-				DixWriteAccess);
-	if (error != Success) {
-            Xfree(swapInfo);
-	    return error;
-        }
-
-        /* Each window must be double-buffered - BadMatch. */
-        if (DBE_WINDOW_PRIV(pWin) == NULL)
-        {
-            Xfree(swapInfo);
-            return(BadMatch);
-        }
-
-        /* Each window must only be specified once - BadMatch. */
-        for (j = i + 1; j < nStuff; j++)
-        {
-            if (dbeSwapInfo[i].window == dbeSwapInfo[j].window)
-            {
-                Xfree(swapInfo);
-                return(BadMatch);
-	    }
-        }
-
-        /* Each swap action must be valid - BadValue. */
-        if ((dbeSwapInfo[i].swapAction != XdbeUndefined ) &&
-            (dbeSwapInfo[i].swapAction != XdbeBackground) &&
-            (dbeSwapInfo[i].swapAction != XdbeUntouched ) &&
-            (dbeSwapInfo[i].swapAction != XdbeCopied    ))
-        {
-            Xfree(swapInfo);
-            return(BadValue);
-        }
-
-        /* Everything checks out OK.  Fill in the swap info array. */
-        swapInfo[i].pWindow    = pWin;     
-        swapInfo[i].swapAction = dbeSwapInfo[i].swapAction;     
-
-    } /* for (i = 0; i < nStuff; i++) */
-
-
-    /* Call the DDX routine to perform the swap(s).  The DDX routine should
-     * scan the swap list (swap info), swap any buffers that it knows how to
-     * handle, delete them from the list, and update nStuff to indicate how
-     * many windows it did not handle.
-     *
-     * This scheme allows a range of sophistication in the DDX SwapBuffers()
-     * implementation.  Naive implementations could just swap the first buffer
-     * in the list, move the last buffer to the front, decrement nStuff, and
-     * return.  The next level of sophistication could be to scan the whole
-     * list for windows on the same screen.  Up another level, the DDX routine
-     * could deal with cross-screen synchronization.
-     */
-
-    while (nStuff > 0)
-    {
-        pDbeScreenPriv = DBE_SCREEN_PRIV_FROM_WINDOW(swapInfo[0].pWindow);
-        error = (*pDbeScreenPriv->SwapBuffers)(client, &nStuff, swapInfo);
-        if (error != Success)
-        {
-            Xfree(swapInfo);
-            return(error);
-        }
-    }
-    
-    Xfree(swapInfo);
-    return(Success);
-
-} /* ProcDbeSwapBuffers() */
-
-
-/******************************************************************************
- *
- * DBE DIX Procedure: ProcDbeBeginIdiom
- *
- * Description:
- *
- *     This function is for processing a DbeBeginIdiom request.
- *     This request informs the server that a complex swap will immediately
- *     follow this request.
- *
- * Return Values:
- *
- *     Success
- *
- *****************************************************************************/
-
-static int
-ProcDbeBeginIdiom(ClientPtr client)
-{
-    /* REQUEST(xDbeBeginIdiomReq); */
-    DbeScreenPrivPtr	pDbeScreenPriv;
-    register int	i;
-
-
-    REQUEST_SIZE_MATCH(xDbeBeginIdiomReq);
-
-    for (i = 0; i < screenInfo.numScreens; i++)
-    {
-        pDbeScreenPriv = DBE_SCREEN_PRIV(screenInfo.screens[i]);
-
-        /* Call the DDX begin idiom procedure if there is one. */
-        if (pDbeScreenPriv->BeginIdiom)
-        {
-           (*pDbeScreenPriv->BeginIdiom)(client);
-        }
-    }
-
-    return(Success);
-
-} /* ProcDbeBeginIdiom() */
-
-
-/******************************************************************************
- *
- * DBE DIX Procedure: ProcDbeGetVisualInfo
- *
- * Description:
- *
- *     This function is for processing a ProcDbeGetVisualInfo request.
- *     This request returns information about which visuals support
- *     double buffering.
- *
- * Return Values:
- *
- *     BadDrawable - value in screen specifiers is not a valid drawable
- *     Success
- *
- *****************************************************************************/
-
-static int
-ProcDbeGetVisualInfo(ClientPtr client)
-{
-    REQUEST(xDbeGetVisualInfoReq);
-    DbeScreenPrivPtr		pDbeScreenPriv;
-    xDbeGetVisualInfoReply	rep;
-    Drawable			*drawables;
-    DrawablePtr			*pDrawables = NULL;
-    register int		i, j, n, rc;
-    register int		count;  /* number of visual infos in reply */
-    register int		length; /* length of reply */
-    ScreenPtr			pScreen;
-    XdbeScreenVisualInfo	*pScrVisInfo;
-
-
-    REQUEST_AT_LEAST_SIZE(xDbeGetVisualInfoReq);
-
-    if (stuff->n > UINT32_MAX / sizeof(DrawablePtr))
-	    return BadAlloc;
-    /* Make sure any specified drawables are valid. */
-    if (stuff->n != 0)
-    {
-        if (!(pDrawables = (DrawablePtr *)Xalloc(stuff->n *
-                                                 sizeof(DrawablePtr))))
-        {
-            return(BadAlloc);
-        }
-
-        drawables = (Drawable *)&stuff[1];
-
-        for (i = 0; i < stuff->n; i++)
-        {
-	    rc = dixLookupDrawable(pDrawables+i, drawables[i], client, 0,
-				   DixGetAttrAccess);
-	    if (rc != Success) {
-                Xfree(pDrawables);
-                return rc;
-            }
-        }
-    }
-
-    count = (stuff->n == 0) ? screenInfo.numScreens : stuff->n;
-    if (!(pScrVisInfo = (XdbeScreenVisualInfo *)xalloc(count *
-                        sizeof(XdbeScreenVisualInfo))))
-    {
-        if (pDrawables)
-        {
-            Xfree(pDrawables);
-        }
-
-        return(BadAlloc);
-    }
-
-    length = 0;
-
-    for (i = 0; i < count; i++)
-    {
-        pScreen = (stuff->n == 0) ? screenInfo.screens[i] :
-                                    pDrawables[i]->pScreen;
-        pDbeScreenPriv = DBE_SCREEN_PRIV(pScreen);
-
-	rc = XaceHook(XACE_SCREEN_ACCESS, client, pScreen, DixGetAttrAccess);
-	if ((rc != Success) ||
-	    !(*pDbeScreenPriv->GetVisualInfo)(pScreen, &pScrVisInfo[i]))
-        {
-            /* We failed to alloc pScrVisInfo[i].visinfo. */
-
-            /* Free visinfos that we allocated for previous screen infos.*/
-            for (j = 0; j < i; j++)
-            {
-                xfree(pScrVisInfo[j].visinfo);
-            }
-
-            /* Free pDrawables if we needed to allocate it above. */
-            if (pDrawables)
-            {
-                Xfree(pDrawables);
-            }
-
-            return (rc == Success) ? BadAlloc : rc;
-        }
-
-        /* Account for n, number of xDbeVisInfo items in list. */
-        length += sizeof(CARD32);
-
-        /* Account for n xDbeVisInfo items */
-        length += pScrVisInfo[i].count * sizeof(xDbeVisInfo);
-    }
-
-    rep.type           = X_Reply;
-    rep.sequenceNumber = client->sequence;
-    rep.length         = bytes_to_int32(length);
-    rep.m              = count;
-
-    if (client->swapped)
-    {
-        swaps(&rep.sequenceNumber, n);
-        swapl(&rep.length, n);
-        swapl(&rep.m, n);
-    }
-
-    /* Send off reply. */
-    WriteToClient(client, sizeof(xDbeGetVisualInfoReply), (char *)&rep);
-
-    for (i = 0; i < count; i++)
-    {
-        CARD32	data32;
-
-        /* For each screen in the reply, send off the visual info */
-
-        /* Send off number of visuals. */
-        data32 = (CARD32)pScrVisInfo[i].count;
-
-        if (client->swapped)
-        {
-            swapl(&data32, n);
-        }
-
-        WriteToClient(client, sizeof(CARD32), (char *)&data32);
-
-        /* Now send off visual info items. */
-        for (j = 0; j < pScrVisInfo[i].count; j++)
-        {
-            xDbeVisInfo		visInfo;
-
-            /* Copy the data in the client data structure to a protocol
-             * data structure.  We will send data to the client from the
-             * protocol data structure.
-             */
-
-            visInfo.visualID  = (CARD32)pScrVisInfo[i].visinfo[j].visual;
-            visInfo.depth     = (CARD8) pScrVisInfo[i].visinfo[j].depth;
-            visInfo.perfLevel = (CARD8) pScrVisInfo[i].visinfo[j].perflevel;
-
-            if (client->swapped)
-            {
-                swapl(&visInfo.visualID, n);
-
-                /* We do not need to swap depth and perfLevel since they are
-                 * already 1 byte quantities.
-                 */
-            }
-
-            /* Write visualID(32), depth(8), perfLevel(8), and pad(16). */
-            WriteToClient(client, 2*sizeof(CARD32), (char *)&visInfo.visualID);
-        }
-    }
-
-    /* Clean up memory. */
-    for (i = 0; i < count; i++)
-    {
-        xfree(pScrVisInfo[i].visinfo);
-    }
-    xfree(pScrVisInfo);
-
-    if (pDrawables)
-    {
-        Xfree(pDrawables);
-    }
-
-    return(client->noClientException);
-
-} /* ProcDbeGetVisualInfo() */
-
-
-/******************************************************************************
- *
- * DBE DIX Procedure: ProcDbeGetbackBufferAttributes
- *
- * Description:
- *
- *     This function is for processing a ProcDbeGetbackBufferAttributes
- *     request.  This request returns information about a back buffer.
- *
- * Return Values:
- *
- *     Success
- *
- *****************************************************************************/
-
-static int
-ProcDbeGetBackBufferAttributes(ClientPtr client)
-{
-    REQUEST(xDbeGetBackBufferAttributesReq);
-    xDbeGetBackBufferAttributesReply	rep;
-    DbeWindowPrivPtr			pDbeWindowPriv;
-    int					rc, n;
-
-
-    REQUEST_SIZE_MATCH(xDbeGetBackBufferAttributesReq);
-
-    rc = dixLookupResourceByType((pointer *)&pDbeWindowPriv, stuff->buffer,
-				 dbeWindowPrivResType, client,
-				 DixGetAttrAccess);
-    if (rc == Success)
-    {
-        rep.attributes = pDbeWindowPriv->pWindow->drawable.id;
-    }
-    else
-    {
-        rep.attributes = None;
-    }
-        
-    rep.type           = X_Reply;
-    rep.sequenceNumber = client->sequence;
-    rep.length         = 0;
-    
-    if (client->swapped)
-    {
-        swaps(&rep.sequenceNumber, n);
-        swapl(&rep.length, n);
-        swapl(&rep.attributes, n);
-    }
-
-    WriteToClient(client, sizeof(xDbeGetBackBufferAttributesReply),
-                  (char *)&rep);
-    return(client->noClientException);
-
-} /* ProcDbeGetbackBufferAttributes() */
-
-
-/******************************************************************************
- *
- * DBE DIX Procedure: ProcDbeDispatch
- *
- * Description:
- *
- *     This function dispatches DBE requests.
- *
- *****************************************************************************/
-
-static int
-ProcDbeDispatch(ClientPtr client)
-{
-    REQUEST(xReq);
-
-
-    switch (stuff->data)
-    {
-        case X_DbeGetVersion:
-            return(ProcDbeGetVersion(client));
-
-        case X_DbeAllocateBackBufferName:
-            return(ProcDbeAllocateBackBufferName(client));
-
-        case X_DbeDeallocateBackBufferName:
-            return(ProcDbeDeallocateBackBufferName(client));
-
-        case X_DbeSwapBuffers:
-            return(ProcDbeSwapBuffers(client));
-
-        case X_DbeBeginIdiom:
-            return(ProcDbeBeginIdiom(client));
-
-        case X_DbeEndIdiom:
-            return(Success);
-
-        case X_DbeGetVisualInfo:
-            return(ProcDbeGetVisualInfo(client));
-
-        case X_DbeGetBackBufferAttributes:
-            return(ProcDbeGetBackBufferAttributes(client));
-
-        default:
-            return(BadRequest);
-    }
-
-} /* ProcDbeDispatch() */
-
-
-/******************************************************************************
- *
- * DBE DIX Procedure: SProcDbeGetVersion
- *
- * Description:
- *
- *     This function is for processing a DbeGetVersion request on a swapped
- *     server.  This request returns the major and minor version numbers of
- *     this extension.
- *
- * Return Values:
- *
- *     Success
- *
- *****************************************************************************/
-
-static int
-SProcDbeGetVersion(ClientPtr client)
-{
-    REQUEST(xDbeGetVersionReq);
-    register int	n;
-
-
-    swaps(&stuff->length, n);
-    return(ProcDbeGetVersion(client));
-
-} /* SProcDbeGetVersion() */
-
-
-/******************************************************************************
- *
- * DBE DIX Procedure: SProcDbeAllocateBackBufferName
- *
- * Description:
- *
- *     This function is for processing a DbeAllocateBackBufferName request on
- *     a swapped server.  This request allocates a drawable ID used to refer
- *     to the back buffer of a window.
- *
- * Return Values:
- *
- *     BadAlloc    - server can not allocate resources
- *     BadIDChoice - id is out of range for client; id is already in use
- *     BadMatch    - window is not an InputOutput window;
- *                   visual of window is not on list returned by
- *                   DBEGetVisualInfo; 
- *     BadValue    - invalid swap action is specified
- *     BadWindow   - window is not a valid window
- *     Success
- *
- *****************************************************************************/
-
-static int
-SProcDbeAllocateBackBufferName(ClientPtr client)
-{
-    REQUEST(xDbeAllocateBackBufferNameReq);
-    register int	n;
-
-    swaps(&stuff->length, n);
-    REQUEST_SIZE_MATCH(xDbeAllocateBackBufferNameReq);
-
-    swapl(&stuff->window, n);
-    swapl(&stuff->buffer, n);
-    /* stuff->swapAction is a byte.  We do not need to swap this field. */
-
-    return(ProcDbeAllocateBackBufferName(client));
-
-} /* SProcDbeAllocateBackBufferName() */
-
-
-/******************************************************************************
- *
- * DBE DIX Procedure: SProcDbeDeallocateBackBufferName
- *
- * Description:
- *
- *     This function is for processing a DbeDeallocateBackBufferName request
- *     on a swapped server.  This request frees a drawable ID that was
- *     obtained by a DbeAllocateBackBufferName request.
- *
- * Return Values:
- *
- *     BadBuffer - buffer to deallocate is not associated with a window
- *     Success
- *
- *****************************************************************************/
-
-static int
-SProcDbeDeallocateBackBufferName(ClientPtr client)
-{
-    REQUEST (xDbeDeallocateBackBufferNameReq);
-    register int	n;
-
-
-    swaps(&stuff->length, n);
-    REQUEST_SIZE_MATCH(xDbeDeallocateBackBufferNameReq);
-
-    swapl(&stuff->buffer, n);
-
-    return(ProcDbeDeallocateBackBufferName(client));
-
-} /* SProcDbeDeallocateBackBufferName() */
-
-
-/******************************************************************************
- *
- * DBE DIX Procedure: SProcDbeSwapBuffers
- *
- * Description:
- *
- *     This function is for processing a DbeSwapBuffers request on a swapped
- *     server.  This request swaps the buffers for all windows listed,
- *     applying the appropriate swap action for each window.
- *
- * Return Values:
- *
- *     BadMatch  - a window in request is not double-buffered; a window in
- *                 request is listed more than once; all windows in request do
- *                 not have the same root
- *     BadValue  - invalid swap action is specified
- *     BadWindow - a window in request is not valid
- *     Success
- *
- *****************************************************************************/
-
-static int
-SProcDbeSwapBuffers(ClientPtr client)
-{
-    REQUEST(xDbeSwapBuffersReq);
-    register int	i, n;
-    xDbeSwapInfo	*pSwapInfo;
-
-
-    swaps(&stuff->length, n);
-    REQUEST_AT_LEAST_SIZE(xDbeSwapBuffersReq);
-
-    swapl(&stuff->n, n);
-
-    if (stuff->n != 0)
-    { 
-        pSwapInfo = (xDbeSwapInfo *)stuff+1;
-
-        /* The swap info following the fix part of this request is a window(32)
-         * followed by a 1 byte swap action and then 3 pad bytes.  We only need
-         * to swap the window information.
-         */
-        for (i = 0; i < stuff->n; i++)
-        {
-            swapl(&pSwapInfo->window, n);
-        }
-    }
-
-    return(ProcDbeSwapBuffers(client));
-
-} /* SProcDbeSwapBuffers() */
-
-
-/******************************************************************************
- *
- * DBE DIX Procedure: SProcDbeBeginIdiom
- *
- * Description:
- *
- *     This function is for processing a DbeBeginIdiom request on a swapped
- *     server.  This request informs the server that a complex swap will
- *     immediately follow this request.
- *
- * Return Values:
- *
- *     Success
- *
- *****************************************************************************/
-
-static int
-SProcDbeBeginIdiom(ClientPtr client)
-{
-    REQUEST(xDbeBeginIdiomReq);
-    register int	n;
-
-    swaps(&stuff->length, n);
-    return(ProcDbeBeginIdiom(client));
-
-} /* SProcDbeBeginIdiom() */
-
-
-/******************************************************************************
- *
- * DBE DIX Procedure: SProcDbeGetVisualInfo
- *
- * Description:
- *
- *     This function is for processing a ProcDbeGetVisualInfo request on a
- *     swapped server.  This request returns information about which visuals
- *     support double buffering.
- *
- * Return Values:
- *
- *     BadDrawable - value in screen specifiers is not a valid drawable
- *     Success
- *
- *****************************************************************************/
-
-static int
-SProcDbeGetVisualInfo(ClientPtr client)
-{
-    REQUEST(xDbeGetVisualInfoReq);
-    register int	n;
-
-
-    swaps(&stuff->length, n);
-    REQUEST_AT_LEAST_SIZE(xDbeGetVisualInfoReq);
-
-    swapl(&stuff->n, n);
-    SwapRestL(stuff);
-
-    return(ProcDbeGetVisualInfo(client));
-
-} /* SProcDbeGetVisualInfo() */
-
-
-/******************************************************************************
- *
- * DBE DIX Procedure: SProcDbeGetbackBufferAttributes
- *
- * Description:
- *
- *     This function is for processing a ProcDbeGetbackBufferAttributes
- *     request on a swapped server.  This request returns information about a
- *     back buffer.
- *
- * Return Values:
- *
- *     Success
- *
- *****************************************************************************/
-
-static int
-SProcDbeGetBackBufferAttributes(ClientPtr client)
-{
-    REQUEST (xDbeGetBackBufferAttributesReq);
-    register int	n;
-
-    swaps(&stuff->length, n);
-    REQUEST_SIZE_MATCH(xDbeGetBackBufferAttributesReq);
-
-    swapl(&stuff->buffer, n);
-
-    return(ProcDbeGetBackBufferAttributes(client));
-
-} /* SProcDbeGetBackBufferAttributes() */
-
-
-/******************************************************************************
- *
- * DBE DIX Procedure: SProcDbeDispatch
- *
- * Description:
- *
- *     This function dispatches DBE requests on a swapped server.
- *
- *****************************************************************************/
-
-static int
-SProcDbeDispatch(ClientPtr client)
-{
-    REQUEST(xReq);
-
-
-    switch (stuff->data)
-    {
-        case X_DbeGetVersion:
-            return(SProcDbeGetVersion(client));
-
-        case X_DbeAllocateBackBufferName:
-            return(SProcDbeAllocateBackBufferName(client));
-
-        case X_DbeDeallocateBackBufferName:
-            return(SProcDbeDeallocateBackBufferName(client));
-
-        case X_DbeSwapBuffers:
-            return(SProcDbeSwapBuffers(client));
-
-        case X_DbeBeginIdiom:
-            return(SProcDbeBeginIdiom(client));
-
-        case X_DbeEndIdiom:
-            return(Success);
-
-        case X_DbeGetVisualInfo:
-            return(SProcDbeGetVisualInfo(client));
-
-        case X_DbeGetBackBufferAttributes:
-            return(SProcDbeGetBackBufferAttributes(client));
-
-        default:
-            return (BadRequest);
-    }
-
-} /* SProcDbeDispatch() */
-
-
-/******************************************************************************
- *
- * DBE DIX Procedure: DbeSetupBackgroundPainter
- *
- * Description:
- *
- *     This function sets up pGC to clear pixmaps.
- *
- * Return Values:
- *
- *     TRUE  - setup was successful
- *     FALSE - the window's background state is NONE
- * 
- *****************************************************************************/
-
-static Bool
-DbeSetupBackgroundPainter(WindowPtr pWin, GCPtr pGC)
-{
-    pointer	gcvalues[4];
-    int		ts_x_origin, ts_y_origin;
-    PixUnion	background;
-    int		backgroundState;
-    Mask	gcmask;
-
-
-    /* First take care of any ParentRelative stuff by altering the
-     * tile/stipple origin to match the coordinates of the upper-left
-     * corner of the first ancestor without a ParentRelative background.
-     * This coordinate is, of course, negative.
-     */
-    ts_x_origin = ts_y_origin = 0;
-    while (pWin->backgroundState == ParentRelative)
-    {
-        ts_x_origin -= pWin->origin.x;
-        ts_y_origin -= pWin->origin.y;
-
-        pWin = pWin->parent;
-    }
-    backgroundState = pWin->backgroundState;
-    background      = pWin->background;
-
-    switch (backgroundState)
-    {
-        case BackgroundPixel:
-            gcvalues[0] = (pointer)background.pixel;
-            gcvalues[1] = (pointer)FillSolid;
-            gcmask = GCForeground|GCFillStyle;
-            break;
-
-        case BackgroundPixmap:
-            gcvalues[0] = (pointer)FillTiled;
-            gcvalues[1] = (pointer)background.pixmap;
-            gcvalues[2] = (pointer)(long)ts_x_origin;
-            gcvalues[3] = (pointer)(long)ts_y_origin;
-            gcmask = GCFillStyle|GCTile|GCTileStipXOrigin|GCTileStipYOrigin;
-            break;
-
-        default:
-            /* pWin->backgroundState == None */
-            return(FALSE);
-    }
-
-    if (DoChangeGC(pGC, gcmask, (XID *)gcvalues, TRUE) != 0)
-    {
-        return(FALSE);
-    }
-
-    return(TRUE);
-
-} /* DbeSetupBackgroundPainter() */
-
-
-/******************************************************************************
- *
- * DBE DIX Procedure: DbeDrawableDelete
- *
- * Description:
- *
- *     This is the resource delete function for dbeDrawableResType.
- *     It is registered when the drawable resource type is created in
- *     DbeExtensionInit().
- *
- *     To make resource deletion simple, we do not do anything in this function
- *     and leave all resource deleteion to DbeWindowPrivDelete(), which will
- *     eventually be called or already has been called.  Deletion functions are
- *     not guaranteed to be called in any particular order.
- *
- *****************************************************************************/
-static int
-DbeDrawableDelete(pointer pDrawable, XID id)
-{
-    return(Success);
-
-} /* DbeDrawableDelete() */
-
-
-/******************************************************************************
- *
- * DBE DIX Procedure: DbeWindowPrivDelete
- *
- * Description:
- *
- *     This is the resource delete function for dbeWindowPrivResType.
- *     It is registered when the drawable resource type is created in
- *     DbeExtensionInit().
- *
- *****************************************************************************/
-static int
-DbeWindowPrivDelete(pointer pDbeWinPriv, XID id)
-{
-    DbeScreenPrivPtr	pDbeScreenPriv;
-    DbeWindowPrivPtr	pDbeWindowPriv = (DbeWindowPrivPtr)pDbeWinPriv;
-    int			i;
-
-
-    /*
-     **************************************************************************
-     ** Remove the buffer ID from the ID array.
-     **************************************************************************
-     */
-
-    /* Find the ID in the ID array. */
-    i = 0;
-    while ((i < pDbeWindowPriv->nBufferIDs) && (pDbeWindowPriv->IDs[i] != id))
-    {
-        i++;
-    }
-
-    if (i == pDbeWindowPriv->nBufferIDs)
-    {
-        /* We did not find the ID in the array.  We should never get here. */
-        return(BadValue);
-    }
-
-    /* Remove the ID from the array. */
-
-    if (i < (pDbeWindowPriv->nBufferIDs - 1))
-    {
-        /* Compress the buffer ID array, overwriting the ID in the process. */
-        memmove(&pDbeWindowPriv->IDs[i], &pDbeWindowPriv->IDs[i+1],
-            (pDbeWindowPriv->nBufferIDs - i - 1) * sizeof(XID));
-    }
-    else
-    {
-        /* We are removing the last ID in the array, in which case, the
-         * assignement below is all that we need to do.
-         */
-    }
-    pDbeWindowPriv->IDs[pDbeWindowPriv->nBufferIDs - 1] = DBE_FREE_ID_ELEMENT;
-
-    pDbeWindowPriv->nBufferIDs--;
-
-    /* If an extended array was allocated, then check to see if the remaining
-     * buffer IDs will fit in the static array.
-     */
-
-    if ((pDbeWindowPriv->maxAvailableIDs >  DBE_INIT_MAX_IDS) &&
-        (pDbeWindowPriv->nBufferIDs      == DBE_INIT_MAX_IDS))
-    {
-        /* Copy the IDs back into the static array. */
-        memcpy(pDbeWindowPriv->initIDs, pDbeWindowPriv->IDs,
-               DBE_INIT_MAX_IDS * sizeof(XID));
-
-        /* Free the extended array; use the static array. */
-        xfree(pDbeWindowPriv->IDs);
-        pDbeWindowPriv->IDs = pDbeWindowPriv->initIDs;
-        pDbeWindowPriv->maxAvailableIDs = DBE_INIT_MAX_IDS;
-    }
-
-
-    /*
-     **************************************************************************
-     ** Perform DDX level tasks.
-     **************************************************************************
-     */
-
-    pDbeScreenPriv = DBE_SCREEN_PRIV_FROM_WINDOW_PRIV(
-                         (DbeWindowPrivPtr)pDbeWindowPriv);
-    (*pDbeScreenPriv->WinPrivDelete)((DbeWindowPrivPtr)pDbeWindowPriv, id);
-
-
-    /*
-     **************************************************************************
-     ** Perform miscellaneous tasks if this is the last buffer associated
-     ** with the window.
-     **************************************************************************
-     */
-
-    if (pDbeWindowPriv->nBufferIDs == 0)
-    {
-        /* Reset the DBE window priv pointer. */
-	dixSetPrivate(&pDbeWindowPriv->pWindow->devPrivates, dbeWindowPrivKey,
-		      NULL);
-
-        /* We are done with the window priv. */
-	dixFreePrivates(pDbeWindowPriv->devPrivates);
-        xfree(pDbeWindowPriv);
-    }
-
-    return(Success);
-
-} /* DbeWindowPrivDelete() */
-
-
-/******************************************************************************
- *
- * DBE DIX Procedure: DbeResetProc
- *
- * Description:
- *
- *     This routine is called at the end of every server generation.
- *     It deallocates any memory reserved for the extension and performs any
- *     other tasks related to shutting down the extension.
- *
- *****************************************************************************/
-static void
-DbeResetProc(ExtensionEntry *extEntry)
-{
-    int			i;
-    ScreenPtr		pScreen;
-    DbeScreenPrivPtr	pDbeScreenPriv;
-    
-    for (i = 0; i < screenInfo.numScreens; i++)
-    {
-	pScreen = screenInfo.screens[i];
-	pDbeScreenPriv = DBE_SCREEN_PRIV(pScreen);
-
-	if (pDbeScreenPriv)
-	{
-            /* Unwrap DestroyWindow, which was wrapped in DbeExtensionInit().*/
-            pScreen->DestroyWindow = pDbeScreenPriv->DestroyWindow;
-
-	    if (pDbeScreenPriv->ResetProc)
-		(*pDbeScreenPriv->ResetProc)(pScreen);
-
-	    dixFreePrivates(pDbeScreenPriv->devPrivates);
-	    xfree(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.
-     **************************************************************************
-     */
-
-    pScreen                = pWin->drawable.pScreen;
-    pDbeScreenPriv         = DBE_SCREEN_PRIV(pScreen);
-    pScreen->DestroyWindow = pDbeScreenPriv->DestroyWindow;
-
-    /*
-     **************************************************************************
-     ** 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)
-        {
-            /* *DbeWinPrivDelete() will free the window private and set it to
-             * NULL if there are no more buffer IDs associated with this
-             * window.
-             */
-            FreeResource(pDbeWindowPriv->IDs[0], RT_NONE);
-            pDbeWindowPriv = DBE_WINDOW_PRIV(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
- *
- * Description:
- *
- *     Called from InitExtensions in main()
- *
- *****************************************************************************/
-
-void
-DbeExtensionInit(void)
-{
-    ExtensionEntry	*extEntry;
-    register int	i, j;
-    ScreenPtr		pScreen = NULL;
-    DbeScreenPrivPtr	pDbeScreenPriv;
-    int			nStubbedScreens = 0;
-    Bool		ddxInitSuccess;
-
-#ifdef PANORAMIX
-    if(!noPanoramiXExtension) return;
-#endif
-
-    /* Create the resource types. */
-    dbeDrawableResType =
-        CreateNewResourceType(DbeDrawableDelete, "dbeDrawable");
-    if (!dbeDrawableResType)
-	return;
-    dbeDrawableResType |= RC_DRAWABLE;
-
-    dbeWindowPrivResType =
-        CreateNewResourceType(DbeWindowPrivDelete, "dbeWindow");
-    if (!dbeWindowPrivResType)
-	return;
-
-    if (!dixRegisterPrivateOffset(dbeDrawableResType,
-				  offsetof(PixmapRec, devPrivates)))
-	return;
-
-    for (i = 0; i < screenInfo.numScreens; i++)
-    {
-        /* For each screen, set up DBE screen privates and init DIX and DDX
-         * interface.
-         */
-
-	pScreen = screenInfo.screens[i];
-
-	if (!(pDbeScreenPriv =
-             (DbeScreenPrivPtr)Xcalloc(sizeof(DbeScreenPrivRec))))
-	{
-            /* If we can not alloc a window or screen private,
-             * then free any privates that we already alloc'ed and return
-             */
-
-	    for (j = 0; j < i; j++)
-	    {
-		xfree(dixLookupPrivate(&screenInfo.screens[j]->devPrivates,
-				       dbeScreenPrivKey));
-		dixSetPrivate(&screenInfo.screens[j]->devPrivates,
-			      dbeScreenPrivKey, NULL);
-	    }
-	    return;
-	}
-
-	dixSetPrivate(&pScreen->devPrivates, dbeScreenPrivKey, pDbeScreenPriv);
-
-        /* Copy the resource types */
-        pDbeScreenPriv->dbeDrawableResType   = dbeDrawableResType;
-        pDbeScreenPriv->dbeWindowPrivResType = dbeWindowPrivResType;
-
-        /* Copy the private indices */
-        pDbeScreenPriv->dbeScreenPrivKey = dbeScreenPrivKey;
-        pDbeScreenPriv->dbeWindowPrivKey = dbeWindowPrivKey;
-
-        {
-            /* We don't have DDX support for DBE anymore */
-
-#ifndef DISABLE_MI_DBE_BY_DEFAULT
-            /* Setup DIX. */
-            pDbeScreenPriv->SetupBackgroundPainter = DbeSetupBackgroundPainter; 
-
-            /* Setup DDX. */
-            ddxInitSuccess = miDbeInit(pScreen, pDbeScreenPriv);
-
-            /* DDX DBE initialization may have the side affect of
-             * reallocating pDbeScreenPriv, so we need to update it.
-             */
-            pDbeScreenPriv = DBE_SCREEN_PRIV(pScreen);
-
-            if (ddxInitSuccess)
-            {
-                /* Wrap DestroyWindow.  The DDX initialization function
-                 * already wrapped PositionWindow for us.
-                 */
-
-                pDbeScreenPriv->DestroyWindow = pScreen->DestroyWindow;
-                pScreen->DestroyWindow        = DbeDestroyWindow;
-            }
-            else
-            {
-                /* DDX initialization failed.  Stub the screen. */
-                DbeStubScreen(pDbeScreenPriv, &nStubbedScreens);
-            }
-#else
-            DbeStubScreen(pDbeScreenPriv, &nStubbedScreens);
-#endif
-
-        }
-
-    } /* for (i = 0; i < screenInfo.numScreens; i++) */
-
-
-    if (nStubbedScreens == screenInfo.numScreens)
-    {
-	/* All screens stubbed.  Clean up and return. */
-
-        for (i = 0; i < screenInfo.numScreens; i++)
-        {
-		xfree(dixLookupPrivate(&screenInfo.screens[i]->devPrivates,
-				       dbeScreenPrivKey));
-		dixSetPrivate(&pScreen->devPrivates, dbeScreenPrivKey, NULL);
-        }
-        return;
-    }
-
-
-    /* Now add the extension. */
-    extEntry = AddExtension(DBE_PROTOCOL_NAME, DbeNumberEvents, 
-                            DbeNumberErrors, ProcDbeDispatch, SProcDbeDispatch,
-                            DbeResetProc, StandardMinorOpcode);
-
-    dbeErrorBase = extEntry->errorBase;
-
-} /* DbeExtensionInit() */
-
+/******************************************************************************

+ * 

+ * Copyright (c) 1994, 1995  Hewlett-Packard Company

+ *

+ * Permission is hereby granted, free of charge, to any person obtaining

+ * a copy of this software and associated documentation files (the

+ * "Software"), to deal in the Software without restriction, including

+ * without limitation the rights to use, copy, modify, merge, publish,

+ * distribute, sublicense, and/or sell copies of the Software, and to

+ * permit persons to whom the Software is furnished to do so, subject to

+ * the following conditions:

+ * 

+ * The above copyright notice and this permission notice shall be included

+ * in all copies or substantial portions of the Software.

+ * 

+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS

+ * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF

+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.

+ * IN NO EVENT SHALL HEWLETT-PACKARD COMPANY BE LIABLE FOR ANY CLAIM,

+ * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR

+ * OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR

+ * THE USE OR OTHER DEALINGS IN THE SOFTWARE.

+ * 

+ * Except as contained in this notice, the name of the Hewlett-Packard

+ * Company shall not be used in advertising or otherwise to promote the

+ * sale, use or other dealings in this Software without prior written

+ * authorization from the Hewlett-Packard Company.

+ * 

+ *     DIX DBE code

+ *

+ *****************************************************************************/

+

+

+/* INCLUDES */

+

+#ifdef HAVE_DIX_CONFIG_H

+#include <dix-config.h>

+#endif

+

+#include <string.h>

+#if HAVE_STDINT_H

+#include <stdint.h>

+#elif !defined(UINT32_MAX)

+#define UINT32_MAX 0xffffffffU

+#endif

+

+#include <X11/X.h>

+#include <X11/Xproto.h>

+#include "scrnintstr.h"

+#include "extnsionst.h"

+#include "gcstruct.h"

+#include "dixstruct.h"

+#define NEED_DBE_PROTOCOL

+#include "dbestruct.h"

+#include "midbe.h"

+#include "xace.h"

+

+/* GLOBALS */

+

+/* These are static globals copied to DBE's screen private for use by DDX */

+static int dbeScreenPrivKeyIndex;

+static DevPrivateKey dbeScreenPrivKey = &dbeScreenPrivKeyIndex;

+static int dbeWindowPrivKeyIndex;

+static DevPrivateKey dbeWindowPrivKey = &dbeWindowPrivKeyIndex;

+

+/* These are static globals copied to DBE's screen private for use by DDX */

+static RESTYPE	dbeDrawableResType;

+static RESTYPE	dbeWindowPrivResType;

+

+/* Used to generate DBE's BadBuffer error. */

+static int	dbeErrorBase;

+

+/******************************************************************************

+ *

+ * DBE DIX Procedure: DbeStubScreen

+ *

+ * Description:

+ *

+ *     This is function stubs the function pointers in the given DBE screen

+ *     private and increments the number of stubbed screens.

+ *

+ *****************************************************************************/

+

+static void

+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;

+    pDbeScreenPriv->SwapBuffers         = NULL;

+    pDbeScreenPriv->BeginIdiom          = NULL;

+    pDbeScreenPriv->EndIdiom            = NULL;

+    pDbeScreenPriv->WinPrivDelete       = NULL;

+    pDbeScreenPriv->ResetProc           = NULL;

+

+    (*nStubbedScreens)++;

+

+} /* DbeStubScreen() */

+

+

+

+/******************************************************************************

+ *

+ * DBE DIX Procedure: ProcDbeGetVersion

+ *

+ * Description:

+ *

+ *     This function is for processing a DbeGetVersion request.

+ *     This request returns the major and minor version numbers of this

+ *     extension.

+ *

+ * Return Values:

+ *

+ *     Success

+ *

+ *****************************************************************************/

+

+static int

+ProcDbeGetVersion(ClientPtr client)

+{

+    /* REQUEST(xDbeGetVersionReq); */

+    xDbeGetVersionReply	rep;

+    register int	n;

+

+

+    REQUEST_SIZE_MATCH(xDbeGetVersionReq);

+

+    rep.type           = X_Reply;

+    rep.length         = 0;

+    rep.sequenceNumber = client->sequence;

+    rep.majorVersion   = DBE_MAJOR_VERSION;

+    rep.minorVersion   = DBE_MINOR_VERSION;

+

+    if (client->swapped)

+    {

+        swaps(&rep.sequenceNumber, n);

+    }

+

+    WriteToClient(client, sizeof(xDbeGetVersionReply), (char *)&rep);

+

+    return Success;

+

+} /* ProcDbeGetVersion() */

+

+

+/******************************************************************************

+ *

+ * DBE DIX Procedure: ProcDbeAllocateBackBufferName

+ *

+ * Description:

+ *

+ *     This function is for processing a DbeAllocateBackBufferName request.

+ *     This request allocates a drawable ID used to refer to the back buffer

+ *     of a window.

+ *

+ * Return Values:

+ *

+ *     BadAlloc    - server can not allocate resources

+ *     BadIDChoice - id is out of range for client; id is already in use

+ *     BadMatch    - window is not an InputOutput window;

+ *                   visual of window is not on list returned by

+ *                   DBEGetVisualInfo; 

+ *     BadValue    - invalid swap action is specified

+ *     BadWindow   - window is not a valid window

+ *     Success

+ *

+ *****************************************************************************/

+

+static int

+ProcDbeAllocateBackBufferName(ClientPtr client)

+{

+    REQUEST(xDbeAllocateBackBufferNameReq);

+    WindowPtr			pWin;

+    DbeScreenPrivPtr		pDbeScreenPriv;

+    DbeWindowPrivPtr		pDbeWindowPriv;

+    XdbeScreenVisualInfo	scrVisInfo;

+    register int		i;

+    Bool			visualMatched = FALSE;

+    xDbeSwapAction		swapAction;

+    VisualID			visual;

+    int				status;

+    int				add_index;

+

+

+    REQUEST_SIZE_MATCH(xDbeAllocateBackBufferNameReq);

+

+    /* The window must be valid. */

+    status = dixLookupWindow(&pWin, stuff->window, client, DixManageAccess);

+    if (status != Success)

+	return status;

+

+    /* The window must be InputOutput. */

+    if (pWin->drawable.class != InputOutput)

+    {

+	return(BadMatch);

+    }

+

+    /* The swap action must be valid. */

+    swapAction = stuff->swapAction;	/* use local var for performance. */

+    if ((swapAction != XdbeUndefined ) &&

+        (swapAction != XdbeBackground) &&

+        (swapAction != XdbeUntouched ) &&

+        (swapAction != XdbeCopied    ))

+    {

+        return(BadValue);

+    }

+

+    /* The id must be in range and not already in use. */

+    LEGAL_NEW_RESOURCE(stuff->buffer, client);

+

+    /* The visual of the window must be in the list returned by

+     * GetVisualInfo.

+     */

+    pDbeScreenPriv = DBE_SCREEN_PRIV_FROM_WINDOW(pWin);

+    if (!pDbeScreenPriv->GetVisualInfo)

+	return(BadMatch); /* screen doesn't support double buffering */

+

+    if (!(*pDbeScreenPriv->GetVisualInfo)(pWin->drawable.pScreen, &scrVisInfo))

+    {

+        /* GetVisualInfo() failed to allocate visual info data. */

+        return(BadAlloc);

+    }

+

+    /* See if the window's visual is on the list. */

+    visual = wVisual(pWin);

+    for (i = 0; (i < scrVisInfo.count) && !visualMatched; i++)

+    {

+        if (scrVisInfo.visinfo[i].visual == visual)

+	{

+	    visualMatched = TRUE;

+	}

+    }

+

+    /* Free what was allocated by the GetVisualInfo() call above. */

+    free(scrVisInfo.visinfo);

+

+    if (!visualMatched)

+    {

+	return(BadMatch);

+    }

+

+    if ((pDbeWindowPriv = DBE_WINDOW_PRIV(pWin)) == NULL)

+    {

+        /* There is no buffer associated with the window.

+         * Allocate a window priv.

+         */

+

+        pDbeWindowPriv = calloc(1, sizeof(DbeWindowPrivRec));

+	if (!pDbeWindowPriv)

+            return(BadAlloc);

+

+        /* Fill out window priv information. */

+        pDbeWindowPriv->pWindow      = pWin;

+        pDbeWindowPriv->width        = pWin->drawable.width;

+        pDbeWindowPriv->height       = pWin->drawable.height;

+        pDbeWindowPriv->x            = pWin->drawable.x;

+        pDbeWindowPriv->y            = pWin->drawable.y;

+        pDbeWindowPriv->nBufferIDs   = 0;

+

+        /* Set the buffer ID array pointer to the initial (static) array). */

+        pDbeWindowPriv->IDs = pDbeWindowPriv->initIDs;

+

+        /* Initialize the buffer ID list. */ 

+        pDbeWindowPriv->maxAvailableIDs = DBE_INIT_MAX_IDS;

+        pDbeWindowPriv->IDs[0] = stuff->buffer;

+

+        add_index = 0;

+        for (i = 0; i < DBE_INIT_MAX_IDS; i++)

+        {

+            pDbeWindowPriv->IDs[i] = DBE_FREE_ID_ELEMENT;

+        }

+

+        /* Actually connect the window priv to the window. */

+        dixSetPrivate(&pWin->devPrivates, dbeWindowPrivKey, pDbeWindowPriv);

+

+    } /* if -- There is no buffer associated with the window. */

+

+    else

+    {

+        /* A buffer is already associated with the window.

+         * Add the new buffer ID to the array, reallocating the array memory

+         * if necessary.

+         */

+

+        /* Determine if there is a free element in the ID array. */

+        for (i = 0; i < pDbeWindowPriv->maxAvailableIDs; i++)

+        {

+            if (pDbeWindowPriv->IDs[i] == DBE_FREE_ID_ELEMENT)

+            {

+                /* There is still room in the ID array. */

+                break;

+            }

+        }

+ 

+        if (i == pDbeWindowPriv->maxAvailableIDs)

+        {

+            /* No more room in the ID array -- reallocate another array. */

+            XID	*pIDs;

+

+            /* Setup an array pointer for the realloc operation below. */

+            if (pDbeWindowPriv->maxAvailableIDs == DBE_INIT_MAX_IDS)

+            {

+                /* We will malloc a new array. */

+                pIDs = NULL;

+            }

+            else

+            {

+                /* We will realloc a new array. */

+                pIDs = pDbeWindowPriv->IDs;

+            }

+

+            /* malloc/realloc a new array and initialize all elements to 0. */

+            pDbeWindowPriv->IDs = (XID *)realloc(pIDs,

+                (pDbeWindowPriv->maxAvailableIDs+DBE_INCR_MAX_IDS)*sizeof(XID));

+            if (!pDbeWindowPriv->IDs)

+            {

+                return(BadAlloc);

+            }

+            memset(&pDbeWindowPriv->IDs[pDbeWindowPriv->nBufferIDs], 0,

+                   (pDbeWindowPriv->maxAvailableIDs + DBE_INCR_MAX_IDS -

+                    pDbeWindowPriv->nBufferIDs) * sizeof(XID));

+

+            if (pDbeWindowPriv->maxAvailableIDs == DBE_INIT_MAX_IDS)

+            {

+                /* We just went from using the initial (static) array to a

+                 * newly allocated array.  Copy the IDs from the initial array

+                 * to the new array.

+                 */

+                memcpy(pDbeWindowPriv->IDs, pDbeWindowPriv->initIDs,

+                       DBE_INIT_MAX_IDS * sizeof(XID));

+            }

+

+            pDbeWindowPriv->maxAvailableIDs += DBE_INCR_MAX_IDS;

+        }

+

+	add_index = i;

+

+    } /* else -- A buffer is already associated with the window. */

+

+

+    /* Call the DDX routine to allocate the back buffer. */

+    status = (*pDbeScreenPriv->AllocBackBufferName)(pWin, stuff->buffer,

+                                                    stuff->swapAction);

+

+    if (status == Success)

+    {

+	pDbeWindowPriv->IDs[add_index] = stuff->buffer;

+        if (!AddResource(stuff->buffer, dbeWindowPrivResType,

+                         (pointer)pDbeWindowPriv))

+	{

+            pDbeWindowPriv->IDs[add_index] = DBE_FREE_ID_ELEMENT;

+

+            if (pDbeWindowPriv->nBufferIDs == 0) {

+                status = BadAlloc;

+                goto out_free;

+            }

+        }

+    } else {

+        /* The DDX buffer allocation routine failed for the first buffer of

+         * this window.

+         */

+        if (pDbeWindowPriv->nBufferIDs == 0) {

+            goto out_free;

+        }

+    }

+

+    /* Increment the number of buffers (XIDs) associated with this window. */

+    pDbeWindowPriv->nBufferIDs++;

+

+    /* Set swap action on all calls. */

+    pDbeWindowPriv->swapAction = stuff->swapAction;

+

+    return(status);

+

+out_free:

+    dixSetPrivate(&pWin->devPrivates, dbeWindowPrivKey, NULL);

+    free(pDbeWindowPriv);

+    return (status);

+

+} /* ProcDbeAllocateBackBufferName() */

+

+

+/******************************************************************************

+ *

+ * DBE DIX Procedure: ProcDbeDeallocateBackBufferName

+ *

+ * Description:

+ *

+ *     This function is for processing a DbeDeallocateBackBufferName request.

+ *     This request frees a drawable ID that was obtained by a

+ *     DbeAllocateBackBufferName request.

+ *

+ * Return Values:

+ *

+ *     BadBuffer - buffer to deallocate is not associated with a window

+ *     Success

+ *

+ *****************************************************************************/

+

+static int

+ProcDbeDeallocateBackBufferName(ClientPtr client)

+{

+    REQUEST(xDbeDeallocateBackBufferNameReq);

+    DbeWindowPrivPtr	pDbeWindowPriv;

+    int			rc, i;

+    pointer val;

+

+

+    REQUEST_SIZE_MATCH(xDbeDeallocateBackBufferNameReq);

+

+    /* Buffer name must be valid */

+    rc = dixLookupResourceByType((pointer *)&pDbeWindowPriv, stuff->buffer,

+				 dbeWindowPrivResType, client,

+				 DixDestroyAccess);

+    if (rc != Success)

+	return (rc == BadValue) ? dbeErrorBase + DbeBadBuffer : rc;

+

+    rc = dixLookupResourceByType(&val, stuff->buffer, dbeDrawableResType,

+				 client, DixDestroyAccess);

+    if (rc != Success)

+	return (rc == BadValue) ? dbeErrorBase + DbeBadBuffer : rc;

+

+    /* Make sure that the id is valid for the window.

+     * This is paranoid code since we already looked up the ID by type

+     * above.

+     */

+

+    for (i = 0; i < pDbeWindowPriv->nBufferIDs; i++)

+    {

+        /* Loop through the ID list to find the ID. */

+        if (pDbeWindowPriv->IDs[i] == stuff->buffer)

+        {

+            break;

+        }

+    }

+

+    if (i == pDbeWindowPriv->nBufferIDs)

+    {

+        /* We did not find the ID in the ID list. */

+        client->errorValue = stuff->buffer;

+        return(dbeErrorBase + DbeBadBuffer);

+    }

+

+    FreeResource(stuff->buffer, RT_NONE);

+

+    return(Success);

+

+} /* ProcDbeDeallocateBackBufferName() */

+

+

+/******************************************************************************

+ *

+ * DBE DIX Procedure: ProcDbeSwapBuffers

+ *

+ * Description:

+ *

+ *     This function is for processing a DbeSwapBuffers request.

+ *     This request swaps the buffers for all windows listed, applying the

+ *     appropriate swap action for each window.

+ *

+ * Return Values:

+ *

+ *     BadAlloc  - local allocation failed; this return value is not defined

+ *                 by the protocol

+ *     BadMatch  - a window in request is not double-buffered; a window in

+ *                 request is listed more than once

+ *     BadValue  - invalid swap action is specified; no swap action is

+ *                 specified

+ *     BadWindow - a window in request is not valid

+ *     Success

+ *

+ *****************************************************************************/

+

+static int

+ProcDbeSwapBuffers(ClientPtr client)

+{

+    REQUEST(xDbeSwapBuffersReq);

+    WindowPtr		pWin;

+    DbeScreenPrivPtr	pDbeScreenPriv;

+    DbeSwapInfoPtr	swapInfo;

+    xDbeSwapInfo	*dbeSwapInfo;

+    int			error;

+    register int	i, j;

+    int			nStuff;

+

+

+    REQUEST_AT_LEAST_SIZE(xDbeSwapBuffersReq);

+    nStuff = stuff->n;	/* use local variable for performance. */

+

+    if (nStuff == 0)

+    {

+        return(Success);

+    }

+

+    if (nStuff > UINT32_MAX / sizeof(DbeSwapInfoRec))

+	    return BadAlloc;

+

+    /* Get to the swap info appended to the end of the request. */

+    dbeSwapInfo = (xDbeSwapInfo *)&stuff[1];

+

+    /* Allocate array to record swap information. */ 

+    swapInfo = (DbeSwapInfoPtr)malloc(nStuff * sizeof(DbeSwapInfoRec));

+    if (swapInfo == NULL)

+    {

+        return(BadAlloc);

+    }

+

+

+    for (i = 0; i < nStuff; i++)

+    {

+        /* Check all windows to swap. */

+

+        /* Each window must be a valid window - BadWindow. */

+	error = dixLookupWindow(&pWin, dbeSwapInfo[i].window, client,

+				DixWriteAccess);

+	if (error != Success) {

+            free(swapInfo);

+	    return error;

+        }

+

+        /* Each window must be double-buffered - BadMatch. */

+        if (DBE_WINDOW_PRIV(pWin) == NULL)

+        {

+            free(swapInfo);

+            return(BadMatch);

+        }

+

+        /* Each window must only be specified once - BadMatch. */

+        for (j = i + 1; j < nStuff; j++)

+        {

+            if (dbeSwapInfo[i].window == dbeSwapInfo[j].window)

+            {

+                free(swapInfo);

+                return(BadMatch);

+	    }

+        }

+

+        /* Each swap action must be valid - BadValue. */

+        if ((dbeSwapInfo[i].swapAction != XdbeUndefined ) &&

+            (dbeSwapInfo[i].swapAction != XdbeBackground) &&

+            (dbeSwapInfo[i].swapAction != XdbeUntouched ) &&

+            (dbeSwapInfo[i].swapAction != XdbeCopied    ))

+        {

+            free(swapInfo);

+            return(BadValue);

+        }

+

+        /* Everything checks out OK.  Fill in the swap info array. */

+        swapInfo[i].pWindow    = pWin;     

+        swapInfo[i].swapAction = dbeSwapInfo[i].swapAction;     

+

+    } /* for (i = 0; i < nStuff; i++) */

+

+

+    /* Call the DDX routine to perform the swap(s).  The DDX routine should

+     * scan the swap list (swap info), swap any buffers that it knows how to

+     * handle, delete them from the list, and update nStuff to indicate how

+     * many windows it did not handle.

+     *

+     * This scheme allows a range of sophistication in the DDX SwapBuffers()

+     * implementation.  Naive implementations could just swap the first buffer

+     * in the list, move the last buffer to the front, decrement nStuff, and

+     * return.  The next level of sophistication could be to scan the whole

+     * list for windows on the same screen.  Up another level, the DDX routine

+     * could deal with cross-screen synchronization.

+     */

+

+    while (nStuff > 0)

+    {

+        pDbeScreenPriv = DBE_SCREEN_PRIV_FROM_WINDOW(swapInfo[0].pWindow);

+        error = (*pDbeScreenPriv->SwapBuffers)(client, &nStuff, swapInfo);

+        if (error != Success)

+        {

+            free(swapInfo);

+            return(error);

+        }

+    }

+    

+    free(swapInfo);

+    return(Success);

+

+} /* ProcDbeSwapBuffers() */

+

+

+/******************************************************************************

+ *

+ * DBE DIX Procedure: ProcDbeBeginIdiom

+ *

+ * Description:

+ *

+ *     This function is for processing a DbeBeginIdiom request.

+ *     This request informs the server that a complex swap will immediately

+ *     follow this request.

+ *

+ * Return Values:

+ *

+ *     Success

+ *

+ *****************************************************************************/

+

+static int

+ProcDbeBeginIdiom(ClientPtr client)

+{

+    /* REQUEST(xDbeBeginIdiomReq); */

+    DbeScreenPrivPtr	pDbeScreenPriv;

+    register int	i;

+

+

+    REQUEST_SIZE_MATCH(xDbeBeginIdiomReq);

+

+    for (i = 0; i < screenInfo.numScreens; i++)

+    {

+        pDbeScreenPriv = DBE_SCREEN_PRIV(screenInfo.screens[i]);

+

+        /* Call the DDX begin idiom procedure if there is one. */

+        if (pDbeScreenPriv->BeginIdiom)

+        {

+           (*pDbeScreenPriv->BeginIdiom)(client);

+        }

+    }

+

+    return(Success);

+

+} /* ProcDbeBeginIdiom() */

+

+

+/******************************************************************************

+ *

+ * DBE DIX Procedure: ProcDbeGetVisualInfo

+ *

+ * Description:

+ *

+ *     This function is for processing a ProcDbeGetVisualInfo request.

+ *     This request returns information about which visuals support

+ *     double buffering.

+ *

+ * Return Values:

+ *

+ *     BadDrawable - value in screen specifiers is not a valid drawable

+ *     Success

+ *

+ *****************************************************************************/

+

+static int

+ProcDbeGetVisualInfo(ClientPtr client)

+{

+    REQUEST(xDbeGetVisualInfoReq);

+    DbeScreenPrivPtr		pDbeScreenPriv;

+    xDbeGetVisualInfoReply	rep;

+    Drawable			*drawables;

+    DrawablePtr			*pDrawables = NULL;

+    register int		i, j, n, rc;

+    register int		count;  /* number of visual infos in reply */

+    register int		length; /* length of reply */

+    ScreenPtr			pScreen;

+    XdbeScreenVisualInfo	*pScrVisInfo;

+

+

+    REQUEST_AT_LEAST_SIZE(xDbeGetVisualInfoReq);

+

+    if (stuff->n > UINT32_MAX / sizeof(DrawablePtr))

+	    return BadAlloc;

+    /* Make sure any specified drawables are valid. */

+    if (stuff->n != 0)

+    {

+        if (!(pDrawables = (DrawablePtr *)malloc(stuff->n *

+                                                 sizeof(DrawablePtr))))

+        {

+            return(BadAlloc);

+        }

+

+        drawables = (Drawable *)&stuff[1];

+

+        for (i = 0; i < stuff->n; i++)

+        {

+	    rc = dixLookupDrawable(pDrawables+i, drawables[i], client, 0,

+				   DixGetAttrAccess);

+	    if (rc != Success) {

+                free(pDrawables);

+                return rc;

+            }

+        }

+    }

+

+    count = (stuff->n == 0) ? screenInfo.numScreens : stuff->n;

+    if (!(pScrVisInfo = (XdbeScreenVisualInfo *)malloc(count *

+                        sizeof(XdbeScreenVisualInfo))))

+    {

+        if (pDrawables)

+        {

+            free(pDrawables);

+        }

+

+        return(BadAlloc);

+    }

+

+    length = 0;

+

+    for (i = 0; i < count; i++)

+    {

+        pScreen = (stuff->n == 0) ? screenInfo.screens[i] :

+                                    pDrawables[i]->pScreen;

+        pDbeScreenPriv = DBE_SCREEN_PRIV(pScreen);

+

+	rc = XaceHook(XACE_SCREEN_ACCESS, client, pScreen, DixGetAttrAccess);

+	if ((rc != Success) ||

+	    !(*pDbeScreenPriv->GetVisualInfo)(pScreen, &pScrVisInfo[i]))

+        {

+            /* We failed to alloc pScrVisInfo[i].visinfo. */

+

+            /* Free visinfos that we allocated for previous screen infos.*/

+            for (j = 0; j < i; j++)

+            {

+                free(pScrVisInfo[j].visinfo);

+            }

+

+            /* Free pDrawables if we needed to allocate it above. */

+            if (pDrawables)

+            {

+                free(pDrawables);

+            }

+

+            return (rc == Success) ? BadAlloc : rc;

+        }

+

+        /* Account for n, number of xDbeVisInfo items in list. */

+        length += sizeof(CARD32);

+

+        /* Account for n xDbeVisInfo items */

+        length += pScrVisInfo[i].count * sizeof(xDbeVisInfo);

+    }

+

+    rep.type           = X_Reply;

+    rep.sequenceNumber = client->sequence;

+    rep.length         = bytes_to_int32(length);

+    rep.m              = count;

+

+    if (client->swapped)

+    {

+        swaps(&rep.sequenceNumber, n);

+        swapl(&rep.length, n);

+        swapl(&rep.m, n);

+    }

+

+    /* Send off reply. */

+    WriteToClient(client, sizeof(xDbeGetVisualInfoReply), (char *)&rep);

+

+    for (i = 0; i < count; i++)

+    {

+        CARD32	data32;

+

+        /* For each screen in the reply, send off the visual info */

+

+        /* Send off number of visuals. */

+        data32 = (CARD32)pScrVisInfo[i].count;

+

+        if (client->swapped)

+        {

+            swapl(&data32, n);

+        }

+

+        WriteToClient(client, sizeof(CARD32), (char *)&data32);

+

+        /* Now send off visual info items. */

+        for (j = 0; j < pScrVisInfo[i].count; j++)

+        {

+            xDbeVisInfo		visInfo;

+

+            /* Copy the data in the client data structure to a protocol

+             * data structure.  We will send data to the client from the

+             * protocol data structure.

+             */

+

+            visInfo.visualID  = (CARD32)pScrVisInfo[i].visinfo[j].visual;

+            visInfo.depth     = (CARD8) pScrVisInfo[i].visinfo[j].depth;

+            visInfo.perfLevel = (CARD8) pScrVisInfo[i].visinfo[j].perflevel;

+

+            if (client->swapped)

+            {

+                swapl(&visInfo.visualID, n);

+

+                /* We do not need to swap depth and perfLevel since they are

+                 * already 1 byte quantities.

+                 */

+            }

+

+            /* Write visualID(32), depth(8), perfLevel(8), and pad(16). */

+            WriteToClient(client, 2*sizeof(CARD32), (char *)&visInfo.visualID);

+        }

+    }

+

+    /* Clean up memory. */

+    for (i = 0; i < count; i++)

+    {

+        free(pScrVisInfo[i].visinfo);

+    }

+    free(pScrVisInfo);

+

+    if (pDrawables)

+    {

+        free(pDrawables);

+    }

+

+    return Success;

+

+} /* ProcDbeGetVisualInfo() */

+

+

+/******************************************************************************

+ *

+ * DBE DIX Procedure: ProcDbeGetbackBufferAttributes

+ *

+ * Description:

+ *

+ *     This function is for processing a ProcDbeGetbackBufferAttributes

+ *     request.  This request returns information about a back buffer.

+ *

+ * Return Values:

+ *

+ *     Success

+ *

+ *****************************************************************************/

+

+static int

+ProcDbeGetBackBufferAttributes(ClientPtr client)

+{

+    REQUEST(xDbeGetBackBufferAttributesReq);

+    xDbeGetBackBufferAttributesReply	rep;

+    DbeWindowPrivPtr			pDbeWindowPriv;

+    int					rc, n;

+

+

+    REQUEST_SIZE_MATCH(xDbeGetBackBufferAttributesReq);

+

+    rc = dixLookupResourceByType((pointer *)&pDbeWindowPriv, stuff->buffer,

+				 dbeWindowPrivResType, client,

+				 DixGetAttrAccess);

+    if (rc == Success)

+    {

+        rep.attributes = pDbeWindowPriv->pWindow->drawable.id;

+    }

+    else

+    {

+        rep.attributes = None;

+    }

+        

+    rep.type           = X_Reply;

+    rep.sequenceNumber = client->sequence;

+    rep.length         = 0;

+    

+    if (client->swapped)

+    {

+        swaps(&rep.sequenceNumber, n);

+        swapl(&rep.length, n);

+        swapl(&rep.attributes, n);

+    }

+

+    WriteToClient(client, sizeof(xDbeGetBackBufferAttributesReply),

+                  (char *)&rep);

+    return Success;

+

+} /* ProcDbeGetbackBufferAttributes() */

+

+

+/******************************************************************************

+ *

+ * DBE DIX Procedure: ProcDbeDispatch

+ *

+ * Description:

+ *

+ *     This function dispatches DBE requests.

+ *

+ *****************************************************************************/

+

+static int

+ProcDbeDispatch(ClientPtr client)

+{

+    REQUEST(xReq);

+

+

+    switch (stuff->data)

+    {

+        case X_DbeGetVersion:

+            return(ProcDbeGetVersion(client));

+

+        case X_DbeAllocateBackBufferName:

+            return(ProcDbeAllocateBackBufferName(client));

+

+        case X_DbeDeallocateBackBufferName:

+            return(ProcDbeDeallocateBackBufferName(client));

+

+        case X_DbeSwapBuffers:

+            return(ProcDbeSwapBuffers(client));

+

+        case X_DbeBeginIdiom:

+            return(ProcDbeBeginIdiom(client));

+

+        case X_DbeEndIdiom:

+            return(Success);

+

+        case X_DbeGetVisualInfo:

+            return(ProcDbeGetVisualInfo(client));

+

+        case X_DbeGetBackBufferAttributes:

+            return(ProcDbeGetBackBufferAttributes(client));

+

+        default:

+            return(BadRequest);

+    }

+

+} /* ProcDbeDispatch() */

+

+

+/******************************************************************************

+ *

+ * DBE DIX Procedure: SProcDbeGetVersion

+ *

+ * Description:

+ *

+ *     This function is for processing a DbeGetVersion request on a swapped

+ *     server.  This request returns the major and minor version numbers of

+ *     this extension.

+ *

+ * Return Values:

+ *

+ *     Success

+ *

+ *****************************************************************************/

+

+static int

+SProcDbeGetVersion(ClientPtr client)

+{

+    REQUEST(xDbeGetVersionReq);

+    register int	n;

+

+

+    swaps(&stuff->length, n);

+    return(ProcDbeGetVersion(client));

+

+} /* SProcDbeGetVersion() */

+

+

+/******************************************************************************

+ *

+ * DBE DIX Procedure: SProcDbeAllocateBackBufferName

+ *

+ * Description:

+ *

+ *     This function is for processing a DbeAllocateBackBufferName request on

+ *     a swapped server.  This request allocates a drawable ID used to refer

+ *     to the back buffer of a window.

+ *

+ * Return Values:

+ *

+ *     BadAlloc    - server can not allocate resources

+ *     BadIDChoice - id is out of range for client; id is already in use

+ *     BadMatch    - window is not an InputOutput window;

+ *                   visual of window is not on list returned by

+ *                   DBEGetVisualInfo; 

+ *     BadValue    - invalid swap action is specified

+ *     BadWindow   - window is not a valid window

+ *     Success

+ *

+ *****************************************************************************/

+

+static int

+SProcDbeAllocateBackBufferName(ClientPtr client)

+{

+    REQUEST(xDbeAllocateBackBufferNameReq);

+    register int	n;

+

+    swaps(&stuff->length, n);

+    REQUEST_SIZE_MATCH(xDbeAllocateBackBufferNameReq);

+

+    swapl(&stuff->window, n);

+    swapl(&stuff->buffer, n);

+    /* stuff->swapAction is a byte.  We do not need to swap this field. */

+

+    return(ProcDbeAllocateBackBufferName(client));

+

+} /* SProcDbeAllocateBackBufferName() */

+

+

+/******************************************************************************

+ *

+ * DBE DIX Procedure: SProcDbeDeallocateBackBufferName

+ *

+ * Description:

+ *

+ *     This function is for processing a DbeDeallocateBackBufferName request

+ *     on a swapped server.  This request frees a drawable ID that was

+ *     obtained by a DbeAllocateBackBufferName request.

+ *

+ * Return Values:

+ *

+ *     BadBuffer - buffer to deallocate is not associated with a window

+ *     Success

+ *

+ *****************************************************************************/

+

+static int

+SProcDbeDeallocateBackBufferName(ClientPtr client)

+{

+    REQUEST (xDbeDeallocateBackBufferNameReq);

+    register int	n;

+

+

+    swaps(&stuff->length, n);

+    REQUEST_SIZE_MATCH(xDbeDeallocateBackBufferNameReq);

+

+    swapl(&stuff->buffer, n);

+

+    return(ProcDbeDeallocateBackBufferName(client));

+

+} /* SProcDbeDeallocateBackBufferName() */

+

+

+/******************************************************************************

+ *

+ * DBE DIX Procedure: SProcDbeSwapBuffers

+ *

+ * Description:

+ *

+ *     This function is for processing a DbeSwapBuffers request on a swapped

+ *     server.  This request swaps the buffers for all windows listed,

+ *     applying the appropriate swap action for each window.

+ *

+ * Return Values:

+ *

+ *     BadMatch  - a window in request is not double-buffered; a window in

+ *                 request is listed more than once; all windows in request do

+ *                 not have the same root

+ *     BadValue  - invalid swap action is specified

+ *     BadWindow - a window in request is not valid

+ *     Success

+ *

+ *****************************************************************************/

+

+static int

+SProcDbeSwapBuffers(ClientPtr client)

+{

+    REQUEST(xDbeSwapBuffersReq);

+    register int	i, n;

+    xDbeSwapInfo	*pSwapInfo;

+

+

+    swaps(&stuff->length, n);

+    REQUEST_AT_LEAST_SIZE(xDbeSwapBuffersReq);

+

+    swapl(&stuff->n, n);

+

+    if (stuff->n != 0)

+    { 

+        pSwapInfo = (xDbeSwapInfo *)stuff+1;

+

+        /* The swap info following the fix part of this request is a window(32)

+         * followed by a 1 byte swap action and then 3 pad bytes.  We only need

+         * to swap the window information.

+         */

+        for (i = 0; i < stuff->n; i++)

+        {

+            swapl(&pSwapInfo->window, n);

+        }

+    }

+

+    return(ProcDbeSwapBuffers(client));

+

+} /* SProcDbeSwapBuffers() */

+

+

+/******************************************************************************

+ *

+ * DBE DIX Procedure: SProcDbeBeginIdiom

+ *

+ * Description:

+ *

+ *     This function is for processing a DbeBeginIdiom request on a swapped

+ *     server.  This request informs the server that a complex swap will

+ *     immediately follow this request.

+ *

+ * Return Values:

+ *

+ *     Success

+ *

+ *****************************************************************************/

+

+static int

+SProcDbeBeginIdiom(ClientPtr client)

+{

+    REQUEST(xDbeBeginIdiomReq);

+    register int	n;

+

+    swaps(&stuff->length, n);

+    return(ProcDbeBeginIdiom(client));

+

+} /* SProcDbeBeginIdiom() */

+

+

+/******************************************************************************

+ *

+ * DBE DIX Procedure: SProcDbeGetVisualInfo

+ *

+ * Description:

+ *

+ *     This function is for processing a ProcDbeGetVisualInfo request on a

+ *     swapped server.  This request returns information about which visuals

+ *     support double buffering.

+ *

+ * Return Values:

+ *

+ *     BadDrawable - value in screen specifiers is not a valid drawable

+ *     Success

+ *

+ *****************************************************************************/

+

+static int

+SProcDbeGetVisualInfo(ClientPtr client)

+{

+    REQUEST(xDbeGetVisualInfoReq);

+    register int	n;

+

+

+    swaps(&stuff->length, n);

+    REQUEST_AT_LEAST_SIZE(xDbeGetVisualInfoReq);

+

+    swapl(&stuff->n, n);

+    SwapRestL(stuff);

+

+    return(ProcDbeGetVisualInfo(client));

+

+} /* SProcDbeGetVisualInfo() */

+

+

+/******************************************************************************

+ *

+ * DBE DIX Procedure: SProcDbeGetbackBufferAttributes

+ *

+ * Description:

+ *

+ *     This function is for processing a ProcDbeGetbackBufferAttributes

+ *     request on a swapped server.  This request returns information about a

+ *     back buffer.

+ *

+ * Return Values:

+ *

+ *     Success

+ *

+ *****************************************************************************/

+

+static int

+SProcDbeGetBackBufferAttributes(ClientPtr client)

+{

+    REQUEST (xDbeGetBackBufferAttributesReq);

+    register int	n;

+

+    swaps(&stuff->length, n);

+    REQUEST_SIZE_MATCH(xDbeGetBackBufferAttributesReq);

+

+    swapl(&stuff->buffer, n);

+

+    return(ProcDbeGetBackBufferAttributes(client));

+

+} /* SProcDbeGetBackBufferAttributes() */

+

+

+/******************************************************************************

+ *

+ * DBE DIX Procedure: SProcDbeDispatch

+ *

+ * Description:

+ *

+ *     This function dispatches DBE requests on a swapped server.

+ *

+ *****************************************************************************/

+

+static int

+SProcDbeDispatch(ClientPtr client)

+{

+    REQUEST(xReq);

+

+

+    switch (stuff->data)

+    {

+        case X_DbeGetVersion:

+            return(SProcDbeGetVersion(client));

+

+        case X_DbeAllocateBackBufferName:

+            return(SProcDbeAllocateBackBufferName(client));

+

+        case X_DbeDeallocateBackBufferName:

+            return(SProcDbeDeallocateBackBufferName(client));

+

+        case X_DbeSwapBuffers:

+            return(SProcDbeSwapBuffers(client));

+

+        case X_DbeBeginIdiom:

+            return(SProcDbeBeginIdiom(client));

+

+        case X_DbeEndIdiom:

+            return(Success);

+

+        case X_DbeGetVisualInfo:

+            return(SProcDbeGetVisualInfo(client));

+

+        case X_DbeGetBackBufferAttributes:

+            return(SProcDbeGetBackBufferAttributes(client));

+

+        default:

+            return (BadRequest);

+    }

+

+} /* SProcDbeDispatch() */

+

+

+/******************************************************************************

+ *

+ * DBE DIX Procedure: DbeSetupBackgroundPainter

+ *

+ * Description:

+ *

+ *     This function sets up pGC to clear pixmaps.

+ *

+ * Return Values:

+ *

+ *     TRUE  - setup was successful

+ *     FALSE - the window's background state is NONE

+ * 

+ *****************************************************************************/

+

+static Bool

+DbeSetupBackgroundPainter(WindowPtr pWin, GCPtr pGC)

+{

+    ChangeGCVal	gcvalues[4];

+    int		ts_x_origin, ts_y_origin;

+    PixUnion	background;

+    int		backgroundState;

+    Mask	gcmask;

+

+

+    /* First take care of any ParentRelative stuff by altering the

+     * tile/stipple origin to match the coordinates of the upper-left

+     * corner of the first ancestor without a ParentRelative background.

+     * This coordinate is, of course, negative.

+     */

+    ts_x_origin = ts_y_origin = 0;

+    while (pWin->backgroundState == ParentRelative)

+    {

+        ts_x_origin -= pWin->origin.x;

+        ts_y_origin -= pWin->origin.y;

+

+        pWin = pWin->parent;

+    }

+    backgroundState = pWin->backgroundState;

+    background      = pWin->background;

+

+    switch (backgroundState)

+    {

+        case BackgroundPixel:

+            gcvalues[0].val = background.pixel;

+            gcvalues[1].val = FillSolid;

+            gcmask = GCForeground|GCFillStyle;

+            break;

+

+        case BackgroundPixmap:

+            gcvalues[0].val = FillTiled;

+            gcvalues[1].ptr = background.pixmap;

+            gcvalues[2].val = ts_x_origin;

+            gcvalues[3].val = ts_y_origin;

+            gcmask = GCFillStyle|GCTile|GCTileStipXOrigin|GCTileStipYOrigin;

+            break;

+

+        default:

+            /* pWin->backgroundState == None */

+            return(FALSE);

+    }

+

+    return ChangeGC(NullClient, pGC, gcmask, gcvalues) == 0;

+} /* DbeSetupBackgroundPainter() */

+

+

+/******************************************************************************

+ *

+ * DBE DIX Procedure: DbeDrawableDelete

+ *

+ * Description:

+ *

+ *     This is the resource delete function for dbeDrawableResType.

+ *     It is registered when the drawable resource type is created in

+ *     DbeExtensionInit().

+ *

+ *     To make resource deletion simple, we do not do anything in this function

+ *     and leave all resource deleteion to DbeWindowPrivDelete(), which will

+ *     eventually be called or already has been called.  Deletion functions are

+ *     not guaranteed to be called in any particular order.

+ *

+ *****************************************************************************/

+static int

+DbeDrawableDelete(pointer pDrawable, XID id)

+{

+    return(Success);

+

+} /* DbeDrawableDelete() */

+

+

+/******************************************************************************

+ *

+ * DBE DIX Procedure: DbeWindowPrivDelete

+ *

+ * Description:

+ *

+ *     This is the resource delete function for dbeWindowPrivResType.

+ *     It is registered when the drawable resource type is created in

+ *     DbeExtensionInit().

+ *

+ *****************************************************************************/

+static int

+DbeWindowPrivDelete(pointer pDbeWinPriv, XID id)

+{

+    DbeScreenPrivPtr	pDbeScreenPriv;

+    DbeWindowPrivPtr	pDbeWindowPriv = (DbeWindowPrivPtr)pDbeWinPriv;

+    int			i;

+

+

+    /*

+     **************************************************************************

+     ** Remove the buffer ID from the ID array.

+     **************************************************************************

+     */

+

+    /* Find the ID in the ID array. */

+    i = 0;

+    while ((i < pDbeWindowPriv->nBufferIDs) && (pDbeWindowPriv->IDs[i] != id))

+    {

+        i++;

+    }

+

+    if (i == pDbeWindowPriv->nBufferIDs)

+    {

+        /* We did not find the ID in the array.  We should never get here. */

+        return(BadValue);

+    }

+

+    /* Remove the ID from the array. */

+

+    if (i < (pDbeWindowPriv->nBufferIDs - 1))

+    {

+        /* Compress the buffer ID array, overwriting the ID in the process. */

+        memmove(&pDbeWindowPriv->IDs[i], &pDbeWindowPriv->IDs[i+1],

+            (pDbeWindowPriv->nBufferIDs - i - 1) * sizeof(XID));

+    }

+    else

+    {

+        /* We are removing the last ID in the array, in which case, the

+         * assignement below is all that we need to do.

+         */

+    }

+    pDbeWindowPriv->IDs[pDbeWindowPriv->nBufferIDs - 1] = DBE_FREE_ID_ELEMENT;

+

+    pDbeWindowPriv->nBufferIDs--;

+

+    /* If an extended array was allocated, then check to see if the remaining

+     * buffer IDs will fit in the static array.

+     */

+

+    if ((pDbeWindowPriv->maxAvailableIDs >  DBE_INIT_MAX_IDS) &&

+        (pDbeWindowPriv->nBufferIDs      == DBE_INIT_MAX_IDS))

+    {

+        /* Copy the IDs back into the static array. */

+        memcpy(pDbeWindowPriv->initIDs, pDbeWindowPriv->IDs,

+               DBE_INIT_MAX_IDS * sizeof(XID));

+

+        /* Free the extended array; use the static array. */

+        free(pDbeWindowPriv->IDs);

+        pDbeWindowPriv->IDs = pDbeWindowPriv->initIDs;

+        pDbeWindowPriv->maxAvailableIDs = DBE_INIT_MAX_IDS;

+    }

+

+

+    /*

+     **************************************************************************

+     ** Perform DDX level tasks.

+     **************************************************************************

+     */

+

+    pDbeScreenPriv = DBE_SCREEN_PRIV_FROM_WINDOW_PRIV(

+                         (DbeWindowPrivPtr)pDbeWindowPriv);

+    (*pDbeScreenPriv->WinPrivDelete)((DbeWindowPrivPtr)pDbeWindowPriv, id);

+

+

+    /*

+     **************************************************************************

+     ** Perform miscellaneous tasks if this is the last buffer associated

+     ** with the window.

+     **************************************************************************

+     */

+

+    if (pDbeWindowPriv->nBufferIDs == 0)

+    {

+        /* Reset the DBE window priv pointer. */

+	dixSetPrivate(&pDbeWindowPriv->pWindow->devPrivates, dbeWindowPrivKey,

+		      NULL);

+

+        /* We are done with the window priv. */

+	dixFreePrivates(pDbeWindowPriv->devPrivates);

+        free(pDbeWindowPriv);

+    }

+

+    return(Success);

+

+} /* DbeWindowPrivDelete() */

+

+

+/******************************************************************************

+ *

+ * DBE DIX Procedure: DbeResetProc

+ *

+ * Description:

+ *

+ *     This routine is called at the end of every server generation.

+ *     It deallocates any memory reserved for the extension and performs any

+ *     other tasks related to shutting down the extension.

+ *

+ *****************************************************************************/

+static void

+DbeResetProc(ExtensionEntry *extEntry)

+{

+    int			i;

+    ScreenPtr		pScreen;

+    DbeScreenPrivPtr	pDbeScreenPriv;

+    

+    for (i = 0; i < screenInfo.numScreens; i++)

+    {

+	pScreen = screenInfo.screens[i];

+	pDbeScreenPriv = DBE_SCREEN_PRIV(pScreen);

+

+	if (pDbeScreenPriv)

+	{

+            /* Unwrap DestroyWindow, which was wrapped in DbeExtensionInit().*/

+            pScreen->DestroyWindow = pDbeScreenPriv->DestroyWindow;

+

+	    if (pDbeScreenPriv->ResetProc)

+		(*pDbeScreenPriv->ResetProc)(pScreen);

+

+	    dixFreePrivates(pDbeScreenPriv->devPrivates);

+	    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.

+     **************************************************************************

+     */

+

+    pScreen                = pWin->drawable.pScreen;

+    pDbeScreenPriv         = DBE_SCREEN_PRIV(pScreen);

+    pScreen->DestroyWindow = pDbeScreenPriv->DestroyWindow;

+

+    /*

+     **************************************************************************

+     ** 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)

+        {

+            /* *DbeWinPrivDelete() will free the window private and set it to

+             * NULL if there are no more buffer IDs associated with this

+             * window.

+             */

+            FreeResource(pDbeWindowPriv->IDs[0], RT_NONE);

+            pDbeWindowPriv = DBE_WINDOW_PRIV(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

+ *

+ * Description:

+ *

+ *     Called from InitExtensions in main()

+ *

+ *****************************************************************************/

+

+void

+DbeExtensionInit(void)

+{

+    ExtensionEntry	*extEntry;

+    register int	i, j;

+    ScreenPtr		pScreen = NULL;

+    DbeScreenPrivPtr	pDbeScreenPriv;

+    int			nStubbedScreens = 0;

+    Bool		ddxInitSuccess;

+

+#ifdef PANORAMIX

+    if(!noPanoramiXExtension) return;

+#endif

+

+    /* Create the resource types. */

+    dbeDrawableResType =

+        CreateNewResourceType(DbeDrawableDelete, "dbeDrawable");

+    if (!dbeDrawableResType)

+	return;

+    dbeDrawableResType |= RC_DRAWABLE;

+

+    dbeWindowPrivResType =

+        CreateNewResourceType(DbeWindowPrivDelete, "dbeWindow");

+    if (!dbeWindowPrivResType)

+	return;

+

+    if (!dixRegisterPrivateOffset(dbeDrawableResType,

+				  offsetof(PixmapRec, devPrivates)))

+	return;

+

+    for (i = 0; i < screenInfo.numScreens; i++)

+    {

+        /* For each screen, set up DBE screen privates and init DIX and DDX

+         * interface.

+         */

+

+	pScreen = screenInfo.screens[i];

+

+	if (!(pDbeScreenPriv =

+              (DbeScreenPrivPtr)calloc(1, sizeof(DbeScreenPrivRec))))

+	{

+            /* If we can not alloc a window or screen private,

+             * then free any privates that we already alloc'ed and return

+             */

+

+	    for (j = 0; j < i; j++)

+	    {

+		free(dixLookupPrivate(&screenInfo.screens[j]->devPrivates,

+				       dbeScreenPrivKey));

+		dixSetPrivate(&screenInfo.screens[j]->devPrivates,

+			      dbeScreenPrivKey, NULL);

+	    }

+	    return;

+	}

+

+	dixSetPrivate(&pScreen->devPrivates, dbeScreenPrivKey, pDbeScreenPriv);

+

+        /* Copy the resource types */

+        pDbeScreenPriv->dbeDrawableResType   = dbeDrawableResType;

+        pDbeScreenPriv->dbeWindowPrivResType = dbeWindowPrivResType;

+

+        /* Copy the private indices */

+        pDbeScreenPriv->dbeScreenPrivKey = dbeScreenPrivKey;

+        pDbeScreenPriv->dbeWindowPrivKey = dbeWindowPrivKey;

+

+        {

+            /* We don't have DDX support for DBE anymore */

+

+#ifndef DISABLE_MI_DBE_BY_DEFAULT

+            /* Setup DIX. */

+            pDbeScreenPriv->SetupBackgroundPainter = DbeSetupBackgroundPainter; 

+

+            /* Setup DDX. */

+            ddxInitSuccess = miDbeInit(pScreen, pDbeScreenPriv);

+

+            /* DDX DBE initialization may have the side affect of

+             * reallocating pDbeScreenPriv, so we need to update it.

+             */

+            pDbeScreenPriv = DBE_SCREEN_PRIV(pScreen);

+

+            if (ddxInitSuccess)

+            {

+                /* Wrap DestroyWindow.  The DDX initialization function

+                 * already wrapped PositionWindow for us.

+                 */

+

+                pDbeScreenPriv->DestroyWindow = pScreen->DestroyWindow;

+                pScreen->DestroyWindow        = DbeDestroyWindow;

+            }

+            else

+            {

+                /* DDX initialization failed.  Stub the screen. */

+                DbeStubScreen(pDbeScreenPriv, &nStubbedScreens);

+            }

+#else

+            DbeStubScreen(pDbeScreenPriv, &nStubbedScreens);

+#endif

+

+        }

+

+    } /* for (i = 0; i < screenInfo.numScreens; i++) */

+

+

+    if (nStubbedScreens == screenInfo.numScreens)

+    {

+	/* All screens stubbed.  Clean up and return. */

+

+        for (i = 0; i < screenInfo.numScreens; i++)

+        {

+		free(dixLookupPrivate(&screenInfo.screens[i]->devPrivates,

+				       dbeScreenPrivKey));

+		dixSetPrivate(&pScreen->devPrivates, dbeScreenPrivKey, NULL);

+        }

+        return;

+    }

+

+

+    /* Now add the extension. */

+    extEntry = AddExtension(DBE_PROTOCOL_NAME, DbeNumberEvents, 

+                            DbeNumberErrors, ProcDbeDispatch, SProcDbeDispatch,

+                            DbeResetProc, StandardMinorOpcode);

+

+    dbeErrorBase = extEntry->errorBase;

+

+} /* DbeExtensionInit() */

+