xserver git update 11/6/2010

1 files changed, 1616 insertions, 1616 deletions

diff --git a/xorg-server/hw/dmx/dmxextension.c b/xorg-server/hw/dmx/dmxextension.c
index c8e8dae65..25a10c015 100644
--- a/xorg-server/hw/dmx/dmxextension.c
+++ b/xorg-server/hw/dmx/dmxextension.c
@@ -1,1616 +1,1616 @@
-/*
- * Copyright 2003-2004 Red Hat Inc., Durham, North Carolina.
- *
- * All Rights Reserved.
- *
- * Permission is hereby granted, free of charge, to any person obtaining
- * a copy of this software and associated documentation files (the
- * "Software"), to deal in the Software without restriction, including
- * without limitation on the rights to use, copy, modify, merge,
- * publish, distribute, sublicense, and/or sell copies of the Software,
- * and to permit persons to whom the Software is furnished to do so,
- * subject to the following conditions:
- *
- * The above copyright notice and this permission notice (including the
- * next paragraph) shall be included in all copies or substantial
- * portions of the Software.
- *
- * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
- * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
- * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
- * NON-INFRINGEMENT.  IN NO EVENT SHALL RED HAT AND/OR THEIR SUPPLIERS
- * 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.
- */
-
-/*
- * Author:
- *   Rickard E. (Rik) Faith <faith@redhat.com>
- *   Kevin E. Martin <kem@redhat.com>
- *
- */
-
-/** \file
- * This file provides the only interface to the X server extension support
- * in programs/Xserver/Xext.  Those programs should only include dmxext.h
- */
-
-#ifdef HAVE_DMX_CONFIG_H
-#include <dmx-config.h>
-#endif
-
-#include <stdlib.h>
-
-#include "dmx.h"
-#include "dmxinit.h"
-#include "dmxextension.h"
-#include "dmxwindow.h"
-#include "dmxcb.h"
-#include "dmxcursor.h"
-#include "dmxpixmap.h"
-#include "dmxgc.h"
-#include "dmxfont.h"
-#include "dmxcmap.h"
-#include "dmxpict.h"
-#include "dmxinput.h"
-#include "dmxsync.h"
-#include "dmxscrinit.h"
-#include "input/dmxinputinit.h"
-
-#include "windowstr.h"
-#include "inputstr.h"                 /* For DeviceIntRec */
-#include <X11/extensions/dmxproto.h>  /* For DMX_BAD_* */
-#include "cursorstr.h"
-
-/* The default font is declared in dix/globals.c, but is not included in
- * _any_ header files. */
-extern FontPtr  defaultFont;
-    
-/** This routine provides information to the DMX protocol extension
- * about a particular screen. */
-Bool dmxGetScreenAttributes(int physical, DMXScreenAttributesPtr attr)
-{
-    DMXScreenInfo *dmxScreen;
-
-    if (physical < 0 || physical >= dmxNumScreens) return FALSE;
-
-    dmxScreen = &dmxScreens[physical];
-    attr->displayName         = dmxScreen->name;
-#ifdef PANORAMIX
-    attr->logicalScreen       = noPanoramiXExtension ? dmxScreen->index : 0;
-#else
-    attr->logicalScreen       = dmxScreen->index;
-#endif
-
-    attr->screenWindowWidth   = dmxScreen->scrnWidth;
-    attr->screenWindowHeight  = dmxScreen->scrnHeight;
-    attr->screenWindowXoffset = dmxScreen->scrnX;
-    attr->screenWindowYoffset = dmxScreen->scrnY;
-
-    attr->rootWindowWidth     = dmxScreen->rootWidth;
-    attr->rootWindowHeight    = dmxScreen->rootHeight;
-    attr->rootWindowXoffset   = dmxScreen->rootX;
-    attr->rootWindowYoffset   = dmxScreen->rootY;
-
-    attr->rootWindowXorigin   = dmxScreen->rootXOrigin;
-    attr->rootWindowYorigin   = dmxScreen->rootYOrigin;
-
-    return TRUE;
-}
-
-/** This routine provides information to the DMX protocol extension
- * about a particular window. */
-Bool dmxGetWindowAttributes(WindowPtr pWindow, DMXWindowAttributesPtr attr)
-{
-    dmxWinPrivPtr pWinPriv = DMX_GET_WINDOW_PRIV(pWindow);
-
-    attr->screen         = pWindow->drawable.pScreen->myNum;
-    attr->window         = pWinPriv->window;
-
-    attr->pos.x          = pWindow->drawable.x;
-    attr->pos.y          = pWindow->drawable.y;
-    attr->pos.width      = pWindow->drawable.width;
-    attr->pos.height     = pWindow->drawable.height;
-
-    if (!pWinPriv->window || pWinPriv->offscreen) {
-        attr->vis.x      = 0;
-        attr->vis.y      = 0;
-        attr->vis.height = 0;
-        attr->vis.width  = 0;
-        return pWinPriv->window ? TRUE : FALSE;
-    }
-
-                                /* Compute display-relative coordinates */
-    attr->vis.x          = pWindow->drawable.x;
-    attr->vis.y          = pWindow->drawable.y;
-    attr->vis.width      = pWindow->drawable.width;
-    attr->vis.height     = pWindow->drawable.height;
-
-    if (attr->pos.x < 0) {
-        attr->vis.x     -= attr->pos.x;
-        attr->vis.width  = attr->pos.x + attr->pos.width - attr->vis.x;
-    }
-    if (attr->pos.x + attr->pos.width > pWindow->drawable.pScreen->width) {
-        if (attr->pos.x < 0)
-            attr->vis.width  = pWindow->drawable.pScreen->width;
-        else
-            attr->vis.width  = pWindow->drawable.pScreen->width - attr->pos.x;
-    }
-    if (attr->pos.y < 0) {
-        attr->vis.y     -= attr->pos.y;
-        attr->vis.height = attr->pos.y + attr->pos.height - attr->vis.y;
-    }
-    if (attr->pos.y + attr->pos.height > pWindow->drawable.pScreen->height) {
-        if (attr->pos.y < 0)
-            attr->vis.height = pWindow->drawable.pScreen->height;
-        else
-            attr->vis.height = pWindow->drawable.pScreen->height - attr->pos.y;
-    }
-
-                                /* Convert to window-relative coordinates */
-    attr->vis.x -= attr->pos.x;
-    attr->vis.y -= attr->pos.y;
-
-    return TRUE;
-}
-
-void dmxGetDesktopAttributes(DMXDesktopAttributesPtr attr)
-{
-    attr->width  = dmxGlobalWidth;
-    attr->height = dmxGlobalHeight;
-    attr->shiftX = 0;            /* NOTE: The upper left hand corner of */
-    attr->shiftY = 0;            /*       the desktop is always <0,0>. */
-}
-
-/** Return the total number of devices, not just #dmxNumInputs.  The
- * number returned should be the same as that returned by
- * XListInputDevices. */
-int dmxGetInputCount(void)
-{
-    int i, total;
-    
-    for (total = i = 0; i < dmxNumInputs; i++) total += dmxInputs[i].numDevs;
-    return total;
-}
-
-/** Return information about the device with id = \a deviceId.  This
- * information is primarily for the #ProcDMXGetInputAttributes()
- * function, which does not have access to the appropriate data
- * structure. */
-int dmxGetInputAttributes(int deviceId, DMXInputAttributesPtr attr)
-{
-    int          i, j;
-    DMXInputInfo *dmxInput;
-
-    if (deviceId < 0) return -1;
-    for (i = 0; i < dmxNumInputs; i++) {
-        dmxInput = &dmxInputs[i];
-        for (j = 0; j < dmxInput->numDevs; j++) {
-            DMXLocalInputInfoPtr dmxLocal = dmxInput->devs[j];
-            if (deviceId != dmxLocal->pDevice->id) continue;
-            attr->isCore             = !!dmxLocal->isCore;
-            attr->sendsCore          = !!dmxLocal->sendsCore;
-            attr->detached           = !!dmxInput->detached;
-            attr->physicalScreen     = -1;
-            attr->physicalId         = -1;
-            attr->name               = NULL;
-            switch (dmxLocal->extType) {
-            case DMX_LOCAL_TYPE_LOCAL:
-                attr->inputType      = 0;
-                break;
-            case DMX_LOCAL_TYPE_CONSOLE:
-                attr->inputType      = 1;
-                attr->name           = dmxInput->name;
-                attr->physicalId     = dmxLocal->deviceId;
-                break;
-            case DMX_LOCAL_TYPE_BACKEND:
-            case DMX_LOCAL_TYPE_COMMON:
-                attr->inputType      = 2;
-                attr->physicalScreen = dmxInput->scrnIdx;
-                attr->name           = dmxInput->name;
-                attr->physicalId     = dmxLocal->deviceId;
-                break;
-            }
-            return 0;           /* Success */
-        }
-    }
-    return -1;                  /* Failure */
-}
-
-/** Reinitialized the cursor boundaries. */
-static void dmxAdjustCursorBoundaries(void)
-{
-    int           i;
-
-    dmxReInitOrigins();
-    dmxInitOverlap();
-    dmxComputeWidthHeight(DMX_NO_RECOMPUTE_BOUNDING_BOX);
-    dmxConnectionBlockCallback();
-    for (i = 0; i < dmxNumInputs; i++) {
-        DMXInputInfo *dmxInput = &dmxInputs[i];
-	if (!dmxInput->detached) dmxInputReInit(dmxInput);
-    }
-
-    dmxCheckCursor();
-
-    for (i = 0; i < dmxNumInputs; i++) {
-        DMXInputInfo *dmxInput = &dmxInputs[i];
-	if (!dmxInput->detached) dmxInputLateReInit(dmxInput);
-    }
-}
-
-/** Add an input with the specified attributes.  If the input is added,
- * the physical id is returned in \a deviceId. */
-int dmxAddInput(DMXInputAttributesPtr attr, int *id)
-{
-    int retcode = BadValue;
-
-    if (attr->inputType == 1)   /* console */
-        retcode = dmxInputAttachConsole(attr->name, attr->sendsCore, id);
-    else if (attr->inputType == 2)   /* backend */
-        retcode = dmxInputAttachBackend(attr->physicalScreen,
-                                        attr->sendsCore,id);
-
-    if (retcode == Success) {
-        /* Adjust the cursor boundaries */
-        dmxAdjustCursorBoundaries();
-
-        /* Force completion of the changes */
-        dmxSync(NULL, TRUE);
-    }
-
-    return retcode;
-}
-
-/** Remove the input with physical id \a id. */
-int dmxRemoveInput(int id)
-{
-    return dmxInputDetachId(id);
-}
-
-/** Return the value of #dmxNumScreens -- the total number of backend
- * screens in use (these are logical screens and may be larger than the
- * number of backend displays). */
-unsigned long dmxGetNumScreens(void)
-{
-    return dmxNumScreens;
-}
-
-/** Make sure that #dmxCreateAndRealizeWindow has been called for \a
- * pWindow. */
-void dmxForceWindowCreation(WindowPtr pWindow)
-{
-    dmxWinPrivPtr pWinPriv = DMX_GET_WINDOW_PRIV(pWindow);
-    if (!pWinPriv->window) dmxCreateAndRealizeWindow(pWindow, TRUE);
-}
-
-/** Flush pending syncs for all screens. */
-void dmxFlushPendingSyncs(void)
-{
-    dmxSync(NULL, TRUE);
-}
-
-/** Update DMX's screen resources to match those of the newly moved
- *  and/or resized "root" window. */
-void dmxUpdateScreenResources(ScreenPtr pScreen, int x, int y, int w, int h)
-{
-    DMXScreenInfo *dmxScreen = &dmxScreens[pScreen->myNum];
-    WindowPtr      pRoot     = WindowTable[pScreen->myNum];
-    WindowPtr      pChild;
-    Bool           anyMarked = FALSE;
-
-    /* Handle special case where width and/or height are zero */
-    if (w == 0 || h == 0) {
-	w = 1;
-	h = 1;
-    }
-
-    /* Change screen size */
-    pScreen->width  = w;
-    pScreen->height = h;
-
-    /* Reset the root window's drawable's size */
-    pRoot->drawable.width  = w;
-    pRoot->drawable.height = h;
-
-    /* Set the root window's new winSize and borderSize */
-    pRoot->winSize.extents.x1 = 0;
-    pRoot->winSize.extents.y1 = 0;
-    pRoot->winSize.extents.x2 = w;
-    pRoot->winSize.extents.y2 = h;
-
-    pRoot->borderSize.extents.x1 = 0;
-    pRoot->borderSize.extents.y1 = 0;
-    pRoot->borderSize.extents.x2 = w;
-    pRoot->borderSize.extents.y2 = h;
-
-    /* Recompute this screen's mmWidth & mmHeight */
-    pScreen->mmWidth =
-	(w * 254 + dmxScreen->beXDPI * 5) / (dmxScreen->beXDPI * 10);
-    pScreen->mmHeight =
-	(h * 254 + dmxScreen->beYDPI * 5) / (dmxScreen->beYDPI * 10);
-
-    /* Recompute this screen's window's clip rects as follows: */
-    /*   1. Mark all of root's children's windows */
-    for (pChild = pRoot->firstChild; pChild; pChild = pChild->nextSib)
-	anyMarked |= pScreen->MarkOverlappedWindows(pChild, pChild,
-						    (WindowPtr *)NULL);
-
-    /*   2. Set the root window's borderClip */
-    pRoot->borderClip.extents.x1 = 0;
-    pRoot->borderClip.extents.y1 = 0;
-    pRoot->borderClip.extents.x2 = w;
-    pRoot->borderClip.extents.y2 = h;
-
-    /*   3. Set the root window's clipList */
-    if (anyMarked) {
-	/* If any windows have been marked, set the root window's
-	 * clipList to be broken since it will be recalculated in
-	 * ValidateTree()
-	 */
-	REGION_BREAK(pScreen, &pRoot->clipList);
-    } else {
-	/* Otherwise, we just set it directly since there are no
-	 * windows visible on this screen
-	 */
-	pRoot->clipList.extents.x1 = 0;
-	pRoot->clipList.extents.y1 = 0;
-	pRoot->clipList.extents.x2 = w;
-	pRoot->clipList.extents.y2 = h;
-    }
-
-    /*   4. Revalidate all clip rects and generate expose events */
-    if (anyMarked) {
-	pScreen->ValidateTree(pRoot, NULL, VTBroken);
-	pScreen->HandleExposures(pRoot);
-	if (pScreen->PostValidateTree)
-	    pScreen->PostValidateTree(pRoot, NULL, VTBroken);
-    }
-}
-
-#ifdef PANORAMIX
-#include "panoramiXsrv.h"
-
-/** Change the "screen" window attributes by resizing the actual window
- *  on the back-end display (if necessary). */
-static void dmxConfigureScreenWindow(int idx,
-				     int x, int y, int w, int h)
-{
-    DMXScreenInfo *dmxScreen = &dmxScreens[idx];
-    ScreenPtr      pScreen   = screenInfo.screens[idx];
-
-    /* Resize "screen" window */
-    if (dmxScreen->scrnX      != x ||
-	dmxScreen->scrnY      != y ||
-	dmxScreen->scrnWidth  != w ||
-	dmxScreen->scrnHeight != h) {
-	dmxResizeScreenWindow(pScreen, x, y, w, h);
-    }
-
-    /* Change "screen" window values */
-    dmxScreen->scrnX      = x;
-    dmxScreen->scrnY      = y;
-    dmxScreen->scrnWidth  = w;
-    dmxScreen->scrnHeight = h;
-}
-				     
-/** Change the "root" window position and size by resizing the actual
- *  window on the back-end display (if necessary) and updating all of
- *  DMX's resources by calling #dmxUpdateScreenResources. */
-static void dmxConfigureRootWindow(int idx, int x, int y, int w, int h)
-{
-    DMXScreenInfo *dmxScreen = &dmxScreens[idx];
-    WindowPtr      pRoot     = WindowTable[idx];
-
-    /* NOTE: Either this function or the ones that it calls must handle
-     * the case where w == 0 || h == 0.  Currently, the functions that
-     * this one calls handle that case. */
-
-    /* 1. Resize "root" window */
-    if (dmxScreen->rootX      != x ||
-	dmxScreen->rootY      != y ||
-	dmxScreen->rootWidth  != w ||
-	dmxScreen->rootHeight != h) {
-	dmxResizeRootWindow(pRoot, x, y, w, h);
-    }
-
-    /* 2. Update all of the screen's resources associated with this root
-     *    window */
-    if (dmxScreen->rootWidth  != w ||
-	dmxScreen->rootHeight != h) {
-	dmxUpdateScreenResources(screenInfo.screens[idx], x, y, w, h);
-    }
-
-    /* Change "root" window values */
-    dmxScreen->rootX      = x;
-    dmxScreen->rootY      = y;
-    dmxScreen->rootWidth  = w;
-    dmxScreen->rootHeight = h;
-}
-
-/** Change the "root" window's origin by updating DMX's internal data
- *  structures (dix and Xinerama) to use the new origin and adjust the
- *  positions of windows that overlap this "root" window. */
-static void dmxSetRootWindowOrigin(int idx, int x, int y)
-{
-    DMXScreenInfo *dmxScreen = &dmxScreens[idx];
-    ScreenPtr      pScreen   = screenInfo.screens[idx];
-    WindowPtr      pRoot     = WindowTable[idx];
-    WindowPtr      pChild;
-    int            xoff;
-    int            yoff;
-
-    /* Change "root" window's origin */
-    dmxScreen->rootXOrigin = x;
-    dmxScreen->rootYOrigin = y;
-
-    /* Compute offsets here in case <x,y> has been changed above */
-    xoff = x - dixScreenOrigins[idx].x;
-    yoff = y - dixScreenOrigins[idx].y;
-
-    /* Adjust the root window's position in dixScreenOrigins */
-    dixScreenOrigins[idx].x = dmxScreen->rootXOrigin;
-    dixScreenOrigins[idx].y = dmxScreen->rootYOrigin;
-
-    /* Recalculate the Xinerama regions and data structs */
-    XineramaReinitData(pScreen);
-
-    /* Adjust each of the root window's children */
-    if (!idx) ReinitializeRootWindow(WindowTable[0], xoff, yoff);
-    pChild = pRoot->firstChild;
-    while (pChild) {
-	/* Adjust child window's position */
-	pScreen->MoveWindow(pChild,
-			    pChild->origin.x - wBorderWidth(pChild) - xoff,
-			    pChild->origin.y - wBorderWidth(pChild) - yoff,
-			    pChild->nextSib,
-			    VTMove);
-
-	/* Note that the call to MoveWindow will eventually call
-	 * dmxPositionWindow which will automatically create a
-	 * window if it is now exposed on screen (for lazy window
-	 * creation optimization) and it will properly set the
-	 * offscreen flag.
-	 */
-
-	pChild = pChild->nextSib;
-    }
-}
-
-/** Configure the attributes of each "screen" and "root" window. */
-int dmxConfigureScreenWindows(int nscreens,
-			      CARD32 *screens,
-			      DMXScreenAttributesPtr attribs,
-			      int *errorScreen)
-{
-    int           i;
-
-    for (i = 0; i < nscreens; i++) {
-	DMXScreenAttributesPtr  attr      = &attribs[i];
-	int                     idx       = screens[i];
-	DMXScreenInfo          *dmxScreen = &dmxScreens[idx];
-
-	if (errorScreen) *errorScreen = i;
-
-	if (!dmxScreen->beDisplay) return DMX_BAD_VALUE;
-
-	/* Check for illegal values */
-	if (idx < 0 || idx >= dmxNumScreens) return BadValue;
-
-	/* The "screen" and "root" windows must have valid sizes */
-	if (attr->screenWindowWidth <= 0 || attr->screenWindowHeight <= 0 ||
-	    attr->rootWindowWidth   <  0 || attr->rootWindowHeight   <  0)
-	    return DMX_BAD_VALUE;
-
-	/* The "screen" window must fit entirely within the BE display */
-	if (attr->screenWindowXoffset < 0 ||
-	    attr->screenWindowYoffset < 0 ||
-	    attr->screenWindowXoffset
-	    + attr->screenWindowWidth  > (unsigned)dmxScreen->beWidth ||
-	    attr->screenWindowYoffset
-	    + attr->screenWindowHeight > (unsigned)dmxScreen->beHeight)
-	    return DMX_BAD_VALUE;
-
-	/* The "root" window must fit entirely within the "screen" window */
-	if (attr->rootWindowXoffset < 0 ||
-	    attr->rootWindowYoffset < 0 ||
-	    attr->rootWindowXoffset
-	    + attr->rootWindowWidth  > attr->screenWindowWidth ||
-	    attr->rootWindowYoffset
-	    + attr->rootWindowHeight > attr->screenWindowHeight)
-	    return DMX_BAD_VALUE;
-
-	/* The "root" window must not expose unaddressable coordinates */
-	if (attr->rootWindowXorigin < 0 ||
-	    attr->rootWindowYorigin < 0 ||
-	    attr->rootWindowXorigin + attr->rootWindowWidth  > 32767 ||
-	    attr->rootWindowYorigin + attr->rootWindowHeight > 32767)
-	    return DMX_BAD_VALUE;
-
-	/* The "root" window must fit within the global bounding box */
-	if (attr->rootWindowXorigin
-	    + attr->rootWindowWidth > (unsigned)dmxGlobalWidth ||
-	    attr->rootWindowYorigin
-	    + attr->rootWindowHeight > (unsigned)dmxGlobalHeight)
-	    return DMX_BAD_VALUE;
-
-	/* FIXME: Handle the rest of the illegal value checking */
-    }
-
-    /* No illegal values found */
-    if (errorScreen) *errorScreen = 0;
-
-    for (i = 0; i < nscreens; i++) {
-	DMXScreenAttributesPtr  attr      = &attribs[i];
-	int                     idx       = screens[i];
-	DMXScreenInfo          *dmxScreen = &dmxScreens[idx];
-
-	dmxLog(dmxInfo, "Changing screen #%d attributes "
-	       "from %dx%d+%d+%d %dx%d+%d+%d +%d+%d "
-	       "to %dx%d+%d+%d %dx%d+%d+%d +%d+%d\n",
-	       idx,
-	       dmxScreen->scrnWidth,      dmxScreen->scrnHeight,
-	       dmxScreen->scrnX,          dmxScreen->scrnY,
-	       dmxScreen->rootWidth,      dmxScreen->rootHeight,
-	       dmxScreen->rootX,          dmxScreen->rootY,
-	       dmxScreen->rootXOrigin,    dmxScreen->rootYOrigin,
-	       attr->screenWindowWidth,   attr->screenWindowHeight,
-	       attr->screenWindowXoffset, attr->screenWindowYoffset,
-	       attr->rootWindowWidth,     attr->rootWindowHeight,
-	       attr->rootWindowXoffset,   attr->rootWindowYoffset,
-	       attr->rootWindowXorigin,   attr->rootWindowYorigin);
-
-	/* Configure "screen" window */
-	dmxConfigureScreenWindow(idx,
-				 attr->screenWindowXoffset,
-				 attr->screenWindowYoffset,
-				 attr->screenWindowWidth,
-				 attr->screenWindowHeight);
-
-	/* Configure "root" window */
-	dmxConfigureRootWindow(idx,
-			       attr->rootWindowXoffset,
-			       attr->rootWindowYoffset,
-			       attr->rootWindowWidth,
-			       attr->rootWindowHeight);
-
-
-	/* Set "root" window's origin */
-	dmxSetRootWindowOrigin(idx,
-			       attr->rootWindowXorigin,
-			       attr->rootWindowYorigin);
-    }
-
-    /* Adjust the cursor boundaries */
-    dmxAdjustCursorBoundaries();
-
-    /* Force completion of the changes */
-    dmxSync(NULL, TRUE);
-
-    return Success;
-}
-
-/** Configure the attributes of the global desktop. */
-int dmxConfigureDesktop(DMXDesktopAttributesPtr attribs)
-{
-    if (attribs->width  <= 0 || attribs->width  >= 32767 ||
-	attribs->height <= 0 || attribs->height >= 32767)
-	return DMX_BAD_VALUE;
-
-    /* If the desktop is shrinking, adjust the "root" windows on each
-     * "screen" window to only show the visible desktop.  Also, handle
-     * the special case where the desktop shrinks such that the it no
-     * longer overlaps an portion of a "screen" window. */
-    if (attribs->width < dmxGlobalWidth || attribs->height < dmxGlobalHeight) {
-	int   i;
-	for (i = 0; i < dmxNumScreens; i++) {
-	    DMXScreenInfo *dmxScreen = &dmxScreens[i];
-	    if (dmxScreen->rootXOrigin
-		+ dmxScreen->rootWidth  > attribs->width ||
-		dmxScreen->rootYOrigin
-		+ dmxScreen->rootHeight > attribs->height) {
-		int  w, h;
-		if ((w = attribs->width  - dmxScreen->rootXOrigin) < 0) w = 0;
-		if ((h = attribs->height - dmxScreen->rootYOrigin) < 0) h = 0;
-		if (w > dmxScreen->scrnWidth)  w = dmxScreen->scrnWidth;
-		if (h > dmxScreen->scrnHeight) h = dmxScreen->scrnHeight;
-		if (w > dmxScreen->rootWidth)  w = dmxScreen->rootWidth;
-		if (h > dmxScreen->rootHeight) h = dmxScreen->rootHeight;
-		dmxConfigureRootWindow(i,
-				       dmxScreen->rootX,
-				       dmxScreen->rootY,
-				       w, h);
-	    }
-	}
-    }
-
-    /* Set the global width/height */
-    dmxSetWidthHeight(attribs->width, attribs->height);
-
-    /* Handle shift[XY] changes */
-    if (attribs->shiftX || attribs->shiftY) {
-	int   i;
-	for (i = 0; i < dmxNumScreens; i++) {
-	    ScreenPtr  pScreen = screenInfo.screens[i];
-	    WindowPtr  pChild  = WindowTable[i]->firstChild;
-	    while (pChild) {
-		/* Adjust child window's position */
-		pScreen->MoveWindow(pChild,
-				    pChild->origin.x - wBorderWidth(pChild)
-				    - attribs->shiftX,
-				    pChild->origin.y - wBorderWidth(pChild)
-				    - attribs->shiftY,
-				    pChild->nextSib,
-				    VTMove);
-
-		/* Note that the call to MoveWindow will eventually call
-		 * dmxPositionWindow which will automatically create a
-		 * window if it is now exposed on screen (for lazy
-		 * window creation optimization) and it will properly
-		 * set the offscreen flag.
-		 */
-
-		pChild = pChild->nextSib;
-	    }
-	}
-    }
-
-    /* Update connection block, Xinerama, etc. -- these appears to
-     * already be handled in dmxConnectionBlockCallback(), which is
-     * called from dmxAdjustCursorBoundaries() [below]. */
-
-    /* Adjust the cursor boundaries */
-    dmxAdjustCursorBoundaries();
-
-    /* Force completion of the changes */
-    dmxSync(NULL, TRUE);
-
-    return Success;
-}
-#endif
-
-/** Create the scratch GCs per depth. */
-static void dmxBECreateScratchGCs(int scrnNum)
-{
-    ScreenPtr  pScreen = screenInfo.screens[scrnNum];
-    GCPtr     *ppGC    = pScreen->GCperDepth;
-    int        i;
-
-    for (i = 0; i <= pScreen->numDepths; i++)
-	dmxBECreateGC(pScreen, ppGC[i]);
-}
-
-#ifdef PANORAMIX
-static Bool FoundPixImage;
-
-/** Search the Xinerama XRT_PIXMAP resources for the pixmap that needs
- *  to have its image restored.  When it is found, see if there is
- *  another screen with the same image.  If so, copy the pixmap image
- *  from the existing screen to the newly created pixmap. */
-static void dmxBERestorePixmapImage(pointer value, XID id, RESTYPE type,
-				    pointer p)
-{
-    if ((type & TypeMask) == (XRT_PIXMAP & TypeMask)) {
-	PixmapPtr      pDst     = (PixmapPtr)p;
-	int            idx      = pDst->drawable.pScreen->myNum;
-	PanoramiXRes  *pXinPix  = (PanoramiXRes *)value;
-	PixmapPtr      pPix;
-	int            i;
-
-	pPix = (PixmapPtr)LookupIDByType(pXinPix->info[idx].id, RT_PIXMAP);
-	if (pPix != pDst) return; /* Not a match.... Next! */
-
-	for (i = 0; i < PanoramiXNumScreens; i++) {
-	    PixmapPtr      pSrc;
-	    dmxPixPrivPtr  pSrcPriv = NULL;
-
-	    if (i == idx) continue; /* Self replication is bad */
-
-	    pSrc =
-		(PixmapPtr)LookupIDByType(pXinPix->info[i].id, RT_PIXMAP);
-	    pSrcPriv = DMX_GET_PIXMAP_PRIV(pSrc);
-	    if (pSrcPriv->pixmap) {
-		DMXScreenInfo *dmxSrcScreen = &dmxScreens[i];
-		DMXScreenInfo *dmxDstScreen = &dmxScreens[idx];
-		dmxPixPrivPtr  pDstPriv = DMX_GET_PIXMAP_PRIV(pDst);
-		XImage        *img;
-		int            j;
-		XlibGC         gc = NULL;
-
-		/* This should never happen, but just in case.... */
-		if (pSrc->drawable.width  != pDst->drawable.width ||
-		    pSrc->drawable.height != pDst->drawable.height)
-		    return;
-
-		/* Copy from src pixmap to dst pixmap */
-		img = XGetImage(dmxSrcScreen->beDisplay,
-				pSrcPriv->pixmap,
-				0, 0,
-				pSrc->drawable.width, pSrc->drawable.height,
-				-1,
-				ZPixmap);
-
-		for (j = 0; j < dmxDstScreen->beNumPixmapFormats; j++) {
-		    if (dmxDstScreen->bePixmapFormats[j].depth == img->depth) {
-			unsigned long  m;
-			XGCValues      v;
-
-			m = GCFunction | GCPlaneMask | GCClipMask;
-			v.function = GXcopy;
-			v.plane_mask = AllPlanes;
-			v.clip_mask = None;
-
-			gc = XCreateGC(dmxDstScreen->beDisplay,
-				       dmxDstScreen->scrnDefDrawables[j],
-				       m, &v);
-			break;
-		    }
-		}
-
-		if (gc) {
-		    XPutImage(dmxDstScreen->beDisplay,
-			      pDstPriv->pixmap,
-			      gc, img, 0, 0, 0, 0,
-			      pDst->drawable.width, pDst->drawable.height);
-		    XFreeGC(dmxDstScreen->beDisplay, gc);
-		    FoundPixImage = True;
-		} else {
-		    dmxLog(dmxWarning, "Could not create GC\n");
-		}
-
-		XDestroyImage(img);
-		return;
-	    }
-	}
-    }
-}
-#endif
-
-/** Restore the pixmap image either from another screen or from an image
- *  that was saved when the screen was previously detached. */
-static void dmxBERestorePixmap(PixmapPtr pPixmap)
-{
-#ifdef PANORAMIX
-    int i;
-
-    /* If Xinerama is not active, there's nothing we can do (see comment
-     * in #else below for more info). */
-    if (noPanoramiXExtension) {
-	dmxLog(dmxWarning, "Cannot restore pixmap image\n");
-	return;
-    }
-
-    FoundPixImage = False;
-    for (i = currentMaxClients; --i >= 0; )
-	if (clients[i])
-	    FindAllClientResources(clients[i], dmxBERestorePixmapImage,
-				   (pointer)pPixmap);
-
-    /* No corresponding pixmap image was found on other screens, so we
-     * need to copy it from the saved image when the screen was detached
-     * (if available). */
-    if (!FoundPixImage) {
-	dmxPixPrivPtr  pPixPriv = DMX_GET_PIXMAP_PRIV(pPixmap);
-
-	if (pPixPriv->detachedImage) {
-	    ScreenPtr      pScreen   = pPixmap->drawable.pScreen;
-	    DMXScreenInfo *dmxScreen = &dmxScreens[pScreen->myNum];
-	    XlibGC         gc        = NULL;
-
-	    for (i = 0; i < dmxScreen->beNumPixmapFormats; i++) {
-		if (dmxScreen->bePixmapFormats[i].depth ==
-		    pPixPriv->detachedImage->depth) {
-		    unsigned long  m;
-		    XGCValues      v;
-
-		    m = GCFunction | GCPlaneMask | GCClipMask;
-		    v.function = GXcopy;
-		    v.plane_mask = AllPlanes;
-		    v.clip_mask = None;
-
-		    gc = XCreateGC(dmxScreen->beDisplay,
-				   dmxScreen->scrnDefDrawables[i],
-				   m, &v);
-		    break;
-		}
-	    }
-
-	    if (gc) {
-		XPutImage(dmxScreen->beDisplay,
-			  pPixPriv->pixmap,
-			  gc,
-			  pPixPriv->detachedImage,
-			  0, 0, 0, 0,
-		      pPixmap->drawable.width, pPixmap->drawable.height);
-		XFreeGC(dmxScreen->beDisplay, gc);
-	    } else {
-		dmxLog(dmxWarning, "Cannot restore pixmap image\n");
-	    }
-
-	    XDestroyImage(pPixPriv->detachedImage);
-	    pPixPriv->detachedImage = NULL;
-	} else {
-	    dmxLog(dmxWarning, "Cannot restore pixmap image\n");
-	}
-    }
-#else
-    /* If Xinerama is not enabled, then there is no other copy of the
-     * pixmap image that we can restore.  Saving all pixmap data is not
-     * a feasible option since there is no mechanism for updating pixmap
-     * data when a screen is detached, which means that the data that
-     * was previously saved would most likely be out of date. */
-    dmxLog(dmxWarning, "Cannot restore pixmap image\n");
-    return;
-#endif
-}
-
-/** Create resources on the back-end server.  This function is called
- *  from #dmxAttachScreen() via the dix layer's FindAllResources
- *  function.  It walks all resources, compares them to the screen
- *  number passed in as \a n and calls the appropriate DMX function to
- *  create the associated resource on the back-end server. */
-static void dmxBECreateResources(pointer value, XID id, RESTYPE type,
-				 pointer n)
-{
-    int        scrnNum = (int)n;
-    ScreenPtr  pScreen = screenInfo.screens[scrnNum];
-
-    if ((type & TypeMask) == (RT_WINDOW & TypeMask)) {
-	/* Window resources are created below in dmxBECreateWindowTree */
-    } else if ((type & TypeMask) == (RT_PIXMAP & TypeMask)) {
-	PixmapPtr  pPix = value;
-	if (pPix->drawable.pScreen->myNum == scrnNum) {
-	    dmxBECreatePixmap(pPix);
-	    dmxBERestorePixmap(pPix);
-	}
-    } else if ((type & TypeMask) == (RT_GC & TypeMask)) {
-	GCPtr  pGC = value;
-	if (pGC->pScreen->myNum == scrnNum) {
-	    /* Create the GC on the back-end server */
-	    dmxBECreateGC(pScreen, pGC);
-	    /* Create any pixmaps associated with this GC */
-	    if (!pGC->tileIsPixel) {
-		dmxBECreatePixmap(pGC->tile.pixmap);
-		dmxBERestorePixmap(pGC->tile.pixmap);
-	    }
-	    if (pGC->stipple != pScreen->PixmapPerDepth[0]) {
-		dmxBECreatePixmap(pGC->stipple);
-		dmxBERestorePixmap(pGC->stipple);
-	    }
-	    if (pGC->font != defaultFont) {
-		(void)dmxBELoadFont(pScreen, pGC->font);
-	    }
-	    /* Update the GC on the back-end server */
-	    dmxChangeGC(pGC, -1L);
-	}
-    } else if ((type & TypeMask) == (RT_FONT & TypeMask)) {
-	(void)dmxBELoadFont(pScreen, (FontPtr)value);
-    } else if ((type & TypeMask) == (RT_CURSOR & TypeMask)) {
-	dmxBECreateCursor(pScreen, (CursorPtr)value);
-    } else if ((type & TypeMask) == (RT_COLORMAP & TypeMask)) {
-	ColormapPtr  pCmap = value;
-	if (pCmap->pScreen->myNum == scrnNum)
-	    (void)dmxBECreateColormap((ColormapPtr)value);
-#if 0
-    /* TODO: Recreate Picture and GlyphSet resources */
-    } else if ((type & TypeMask) == (PictureType & TypeMask)) {
-	/* Picture resources are created when windows are created */
-    } else if ((type & TypeMask) == (GlyphSetType & TypeMask)) {
-	dmxBEFreeGlyphSet(pScreen, (GlyphSetPtr)value);
-#endif
-    } else {
-	/* Other resource types??? */
-    }
-}
-
-/** Create window hierachy on back-end server.  The window tree is
- *  created in a special order (bottom most subwindow first) so that the
- *  #dmxCreateNonRootWindow() function does not need to recursively call
- *  itself to create each window's parents.  This is required so that we
- *  have the opportunity to create each window's border and background
- *  pixmaps (where appropriate) before the window is created. */
-static void dmxBECreateWindowTree(int idx)
-{
-    DMXScreenInfo *dmxScreen = &dmxScreens[idx];
-    WindowPtr      pRoot     = WindowTable[idx];
-    dmxWinPrivPtr  pWinPriv  = DMX_GET_WINDOW_PRIV(pRoot);
-    WindowPtr      pWin;
-
-    /* Create the pixmaps associated with the root window */
-    if (!pRoot->borderIsPixel) {
-	dmxBECreatePixmap(pRoot->border.pixmap);
-	dmxBERestorePixmap(pRoot->border.pixmap);
-    }
-    if (pRoot->backgroundState == BackgroundPixmap) {
-	dmxBECreatePixmap(pRoot->background.pixmap);
-	dmxBERestorePixmap(pRoot->background.pixmap);
-    }
-
-    /* Create root window first */
-    dmxScreen->rootWin = pWinPriv->window = dmxCreateRootWindow(pRoot);
-    XMapWindow(dmxScreen->beDisplay, dmxScreen->rootWin);
-
-    pWin = pRoot->lastChild;
-    while (pWin) {
-	pWinPriv = DMX_GET_WINDOW_PRIV(pWin);
-
-	/* Create the pixmaps regardless of whether or not the
-	 * window is created or not due to lazy window creation.
-	 */
-	if (!pWin->borderIsPixel) {
-	    dmxBECreatePixmap(pWin->border.pixmap);
-	    dmxBERestorePixmap(pWin->border.pixmap);
-	}
-	if (pWin->backgroundState == BackgroundPixmap) {
-	    dmxBECreatePixmap(pWin->background.pixmap);
-	    dmxBERestorePixmap(pWin->background.pixmap);
-	}
-
-	/* Reset the window attributes */
-	dmxGetDefaultWindowAttributes(pWin,
-				      &pWinPriv->cmap,
-				      &pWinPriv->visual);
-
-	/* Create the window */
-	if (pWinPriv->mapped && !pWinPriv->offscreen)
-	    dmxCreateAndRealizeWindow(pWin, TRUE);
-
-	/* Next, create the bottom-most child */
-	if (pWin->lastChild) {
-	    pWin = pWin->lastChild;
-	    continue;
-	}
-
-	/* If the window has no children, move on to the next higher window */
-	while (!pWin->prevSib && (pWin != pRoot))
-	    pWin = pWin->parent;
-
-	if (pWin->prevSib) {
-	    pWin = pWin->prevSib;
-	    continue;
-	}
-
-	/* When we reach the root window, we are finished */
-	if (pWin == pRoot)
-	    break;
-    }
-}
-
-/* Refresh screen by generating exposure events for all windows */
-static void dmxForceExposures(int idx)
-{
-    ScreenPtr      pScreen   = screenInfo.screens[idx];
-    WindowPtr  pRoot     = WindowTable[idx];
-    Bool       anyMarked = FALSE;
-    WindowPtr  pChild;
-
-    for (pChild = pRoot->firstChild; pChild; pChild = pChild->nextSib)
-	anyMarked |= pScreen->MarkOverlappedWindows(pChild, pChild,
-						    (WindowPtr *)NULL);
-    if (anyMarked) {
-	/* If any windows have been marked, set the root window's
-	 * clipList to be broken since it will be recalculated in
-	 * ValidateTree()
-	 */
-	REGION_BREAK(pScreen, &pRoot->clipList);
-	pScreen->ValidateTree(pRoot, NULL, VTBroken);
-	pScreen->HandleExposures(pRoot);
-	if (pScreen->PostValidateTree)
-	    pScreen->PostValidateTree(pRoot, NULL, VTBroken);
-    }
-}
-
-/** Compare the new and old screens to see if they are compatible. */
-static Bool dmxCompareScreens(DMXScreenInfo *new, DMXScreenInfo *old)
-{
-    int i;
-
-    if (new->beWidth != old->beWidth) return FALSE;
-    if (new->beHeight != old->beHeight) return FALSE;
-    if (new->beDepth != old->beDepth) return FALSE;
-    if (new->beBPP != old->beBPP) return FALSE;
-
-    if (new->beNumDepths != old->beNumDepths) return FALSE;
-    for (i = 0; i < old->beNumDepths; i++)
-	if (new->beDepths[i] != old->beDepths[i]) return FALSE;
-
-    if (new->beNumPixmapFormats != old->beNumPixmapFormats) return FALSE;
-    for (i = 0; i < old->beNumPixmapFormats; i++) {
-	if (new->bePixmapFormats[i].depth !=
-	    old->bePixmapFormats[i].depth) return FALSE;
-	if (new->bePixmapFormats[i].bits_per_pixel !=
-	    old->bePixmapFormats[i].bits_per_pixel) return FALSE;
-	if (new->bePixmapFormats[i].scanline_pad !=
-	    old->bePixmapFormats[i].scanline_pad) return FALSE;
-    }
-
-    if (new->beNumVisuals != old->beNumVisuals) return FALSE;
-    for (i = 0; i < old->beNumVisuals; i++) {
-	if (new->beVisuals[i].visualid !=
-	    old->beVisuals[i].visualid) return FALSE;
-	if (new->beVisuals[i].screen !=
-	    old->beVisuals[i].screen) return FALSE;
-	if (new->beVisuals[i].depth !=
-	    old->beVisuals[i].depth) return FALSE;
-	if (new->beVisuals[i].class !=
-	    old->beVisuals[i].class) return FALSE;
-	if (new->beVisuals[i].red_mask !=
-	    old->beVisuals[i].red_mask) return FALSE;
-	if (new->beVisuals[i].green_mask !=
-	    old->beVisuals[i].green_mask) return FALSE;
-	if (new->beVisuals[i].blue_mask !=
-	    old->beVisuals[i].blue_mask) return FALSE;
-	if (new->beVisuals[i].colormap_size !=
-	    old->beVisuals[i].colormap_size) return FALSE;
-	if (new->beVisuals[i].bits_per_rgb !=
-	    old->beVisuals[i].bits_per_rgb) return FALSE;
-    }
-
-    if (new->beDefVisualIndex != old->beDefVisualIndex) return FALSE;
-
-    return TRUE;
-}
-
-/** Restore Render's picture */
-static void dmxBERestoreRenderPict(pointer value, XID id, pointer n)
-{
-    PicturePtr   pPicture = value;               /* The picture */
-    DrawablePtr  pDraw    = pPicture->pDrawable; /* The picture's drawable */
-    int          scrnNum  = (int)n;
-
-    if (pDraw->pScreen->myNum != scrnNum) {
-	/* Picture not on the screen we are restoring*/
-	return;
-    }
-
-    if (pDraw->type == DRAWABLE_PIXMAP) {
-	PixmapPtr  pPixmap = (PixmapPtr)pDraw;
-	
-	/* Create and restore the pixmap drawable */
-	dmxBECreatePixmap(pPixmap);
-	dmxBERestorePixmap(pPixmap);
-    }
-
-    dmxBECreatePicture(pPicture);
-}
-
-/** Restore Render's glyphs */
-static void dmxBERestoreRenderGlyph(pointer value, XID id, pointer n)
-{
-    GlyphSetPtr      glyphSet   = value;
-    int              scrnNum    = (int)n;
-    dmxGlyphPrivPtr  glyphPriv  = DMX_GET_GLYPH_PRIV(glyphSet);
-    DMXScreenInfo   *dmxScreen  = &dmxScreens[scrnNum];
-    GlyphRefPtr      table;
-    char            *images;
-    Glyph           *gids;
-    XGlyphInfo      *glyphs;
-    char            *pos;
-    int              beret;
-    int              len_images = 0;
-    int              i;
-    int              ctr;
-
-    if (glyphPriv->glyphSets[scrnNum]) {
-	/* Only restore glyphs on the screen we are attaching */
-	return;
-    }
-
-    /* First we must create the glyph set on the backend. */
-    if ((beret = dmxBECreateGlyphSet(scrnNum, glyphSet)) != Success) {
-	dmxLog(dmxWarning,
-	       "\tdmxBERestoreRenderGlyph failed to create glyphset!\n");
-	return;
-    }
-
-    /* Now for the complex part, restore the glyph data */
-    table = glyphSet->hash.table;
-
-    /* We need to know how much memory to allocate for this part */
-    for (i = 0; i < glyphSet->hash.hashSet->size; i++) {
-	GlyphRefPtr  gr = &table[i];
-	GlyphPtr     gl = gr->glyph;
-
-	if (!gl || gl == DeletedGlyph) continue;
-	len_images += gl->size - sizeof(gl->info);
-    }
-
-    /* Now allocate the memory we need */
-    images = calloc(len_images, sizeof(char));
-    gids   = malloc(glyphSet->hash.tableEntries*sizeof(Glyph));
-    glyphs = malloc(glyphSet->hash.tableEntries*sizeof(XGlyphInfo));
-
-    pos = images;
-    ctr = 0;
-    
-    /* Fill the allocated memory with the proper data */
-    for (i = 0; i < glyphSet->hash.hashSet->size; i++) {
-	GlyphRefPtr  gr = &table[i];
-	GlyphPtr     gl = gr->glyph;
-
-	if (!gl || gl == DeletedGlyph) continue;
-
-	/* First lets put the data into gids */
-	gids[ctr] = gr->signature;
-
-	/* Next do the glyphs data structures */
-	glyphs[ctr].width  = gl->info.width;
-	glyphs[ctr].height = gl->info.height;
-	glyphs[ctr].x      = gl->info.x;
-	glyphs[ctr].y      = gl->info.y;
-	glyphs[ctr].xOff   = gl->info.xOff;
-	glyphs[ctr].yOff   = gl->info.yOff;
-
-	/* Copy the images from the DIX's data into the buffer */
-	memcpy(pos, gl+1, gl->size - sizeof(gl->info));
-	pos += gl->size - sizeof(gl->info);
-	ctr++;
-    }
-    
-    /* Now restore the glyph data */
-    XRenderAddGlyphs(dmxScreen->beDisplay, glyphPriv->glyphSets[scrnNum],
-		     gids,glyphs, glyphSet->hash.tableEntries, images,
-		     len_images);
-
-    /* Clean up */
-    free(images);
-    free(gids);
-    free(glyphs);    
-}
-
-/** Reattach previously detached back-end screen. */
-int dmxAttachScreen(int idx, DMXScreenAttributesPtr attr)
-{
-    ScreenPtr      pScreen;
-    DMXScreenInfo *dmxScreen;
-    CARD32         scrnNum   = idx;
-    DMXScreenInfo  oldDMXScreen;
-    int            i;
-
-    /* Return failure if dynamic addition/removal of screens is disabled */
-    if (!dmxAddRemoveScreens) {
-	dmxLog(dmxWarning,
-	       "Attempting to add a screen, but the AddRemoveScreen\n");
-	dmxLog(dmxWarning,
-	       "extension has not been enabled.  To enable this extension\n");
-	dmxLog(dmxWarning,
-	       "add the \"-addremovescreens\" option either to the command\n");
-	dmxLog(dmxWarning,
-	       "line or in the configuration file.\n");
-	return 1;
-    }
-
-    /* Cannot add a screen that does not exist */
-    if (idx < 0 || idx >= dmxNumScreens) return 1;
-    pScreen = screenInfo.screens[idx];
-    dmxScreen = &dmxScreens[idx];
-
-    /* Cannot attach to a screen that is already opened */
-    if (dmxScreen->beDisplay) {
-	dmxLog(dmxWarning,
-	       "Attempting to add screen #%d but a screen already exists\n",
-	       idx);
-	return 1;
-    }
-
-    dmxLogOutput(dmxScreen, "Attaching screen #%d\n", idx);
-
-    /* Save old info */
-    oldDMXScreen = *dmxScreen;
-
-    /* Copy the name to the new screen */
-    dmxScreen->name = strdup(attr->displayName);
-
-    /* Open display and get all of the screen info */
-    if (!dmxOpenDisplay(dmxScreen)) {
-	dmxLog(dmxWarning,
-               "dmxOpenDisplay: Unable to open display %s\n",
-               dmxScreen->name);
-
-	/* Restore the old screen */
-	*dmxScreen = oldDMXScreen;
-	return 1;
-    }
-
-    dmxSetErrorHandler(dmxScreen);
-    dmxCheckForWM(dmxScreen);
-    dmxGetScreenAttribs(dmxScreen);
-
-    if (!dmxGetVisualInfo(dmxScreen)) {
-	dmxLog(dmxWarning, "dmxGetVisualInfo: No matching visuals found\n");
-	XFree(dmxScreen->beVisuals);
-	XCloseDisplay(dmxScreen->beDisplay);
-
-	/* Restore the old screen */
-	*dmxScreen = oldDMXScreen;
-	return 1;
-    }
-
-    dmxGetColormaps(dmxScreen);
-    dmxGetPixmapFormats(dmxScreen);
-
-    /* Verify that the screen to be added has the same info as the
-     * previously added screen. */
-    if (!dmxCompareScreens(dmxScreen, &oldDMXScreen)) {
-	dmxLog(dmxWarning,
-	       "New screen data (%s) does not match previously\n",
-	       dmxScreen->name);
-	dmxLog(dmxWarning,
-	       "attached screen data (%s)\n",
-	       oldDMXScreen.name);
-	dmxLog(dmxWarning,
-	       "All data must match in order to attach to screen #%d\n",
-	       idx);
-	XFree(dmxScreen->beVisuals);
-	XFree(dmxScreen->beDepths);
-	XFree(dmxScreen->bePixmapFormats);
-	XCloseDisplay(dmxScreen->beDisplay);
-
-	/* Restore the old screen */
-	*dmxScreen = oldDMXScreen;
-	return 1;
-    }
-
-    /* Initialize the BE screen resources */
-    dmxBEScreenInit(idx, screenInfo.screens[idx]);
-
-    /* TODO: Handle GLX visual initialization.  GLXProxy needs to be
-     * updated to handle dynamic addition/removal of screens. */
-
-    /* Create default stipple */
-    dmxBECreatePixmap(pScreen->PixmapPerDepth[0]);
-    dmxBERestorePixmap(pScreen->PixmapPerDepth[0]);
-
-    /* Create the scratch GCs */
-    dmxBECreateScratchGCs(idx);
-
-    /* Create the default font */
-    (void)dmxBELoadFont(pScreen, defaultFont);
-
-    /* Create all resources that don't depend on windows */
-    for (i = currentMaxClients; --i >= 0; )
-	if (clients[i])
-	    FindAllClientResources(clients[i], dmxBECreateResources,
-				   (pointer)idx);
-
-    /* Create window hierarchy (top down) */
-    dmxBECreateWindowTree(idx);
-
-    /* Restore the picture state for RENDER */
-    for (i = currentMaxClients; --i >= 0; )
-	if (clients[i])
-	    FindClientResourcesByType(clients[i],PictureType, 
-				      dmxBERestoreRenderPict,(pointer)idx);
-
-    /* Restore the glyph state for RENDER */
-    for (i = currentMaxClients; --i >= 0; )
-	if (clients[i])
-	    FindClientResourcesByType(clients[i],GlyphSetType, 
-				      dmxBERestoreRenderGlyph,(pointer)idx);
-
-    /* Refresh screen by generating exposure events for all windows */
-    dmxForceExposures(idx);
-
-    dmxSync(&dmxScreens[idx], TRUE);
-
-    /* We used these to compare the old and new screens.  They are no
-     * longer needed since we have a newly attached screen, so we can
-     * now free the old screen's resources. */
-    XFree(oldDMXScreen.beVisuals);
-    XFree(oldDMXScreen.beDepths);
-    XFree(oldDMXScreen.bePixmapFormats);
-    /* TODO: should oldDMXScreen.name be freed?? */
-
-#ifdef PANORAMIX
-    if (!noPanoramiXExtension)
-	return dmxConfigureScreenWindows(1, &scrnNum, attr, NULL);
-    else
-#endif
-	return 0; /* Success */
-}
-
-/*
- * Resources that may have state on the BE server and need to be freed:
- *
- * RT_NONE
- * RT_WINDOW
- * RT_PIXMAP
- * RT_GC
- * RT_FONT
- * RT_CURSOR
- * RT_COLORMAP
- * RT_CMAPENTRY
- * RT_OTHERCLIENT
- * RT_PASSIVEGRAB
- * XRT_WINDOW
- * XRT_PIXMAP
- * XRT_GC
- * XRT_COLORMAP
- * XRT_PICTURE
- * PictureType
- * PictFormatType
- * GlyphSetType
- * ClientType
- * EventType
- * RT_INPUTCLIENT
- * XETrapType
- * RTCounter
- * RTAwait
- * RTAlarmClient
- * RT_XKBCLIENT
- * RTContext
- * TagResType
- * StalledResType
- * SecurityAuthorizationResType
- * RTEventClient
- * __glXContextRes
- * __glXClientRes
- * __glXPixmapRes
- * __glXWindowRes
- * __glXPbufferRes
- */
-
-#ifdef PANORAMIX
-/** Search the Xinerama XRT_PIXMAP resources for the pixmap that needs
- *  to have its image saved. */
-static void dmxBEFindPixmapImage(pointer value, XID id, RESTYPE type,
-				 pointer p)
-{
-    if ((type & TypeMask) == (XRT_PIXMAP & TypeMask)) {
-	PixmapPtr      pDst     = (PixmapPtr)p;
-	int            idx      = pDst->drawable.pScreen->myNum;
-	PanoramiXRes  *pXinPix  = (PanoramiXRes *)value;
-	PixmapPtr      pPix;
-	int            i;
-
-	pPix = (PixmapPtr)LookupIDByType(pXinPix->info[idx].id, RT_PIXMAP);
-	if (pPix != pDst) return; /* Not a match.... Next! */
-
-	for (i = 0; i < PanoramiXNumScreens; i++) {
-	    PixmapPtr      pSrc;
-	    dmxPixPrivPtr  pSrcPriv = NULL;
-
-	    if (i == idx) continue; /* Self replication is bad */
-
-	    pSrc =
-		(PixmapPtr)LookupIDByType(pXinPix->info[i].id, RT_PIXMAP);
-	    pSrcPriv = DMX_GET_PIXMAP_PRIV(pSrc);
-	    if (pSrcPriv->pixmap) {
-		FoundPixImage = True;
-		return;
-	    }
-	}
-    }
-}
-#endif
-
-/** Save the pixmap image only when there is not another screen with
- *  that pixmap from which the image can be read when the screen is
- *  reattached.  To do this, we first try to find a pixmap on another
- *  screen corresponding to the one we are trying to save.  If we find
- *  one, then we do not need to save the image data since during
- *  reattachment, the image data can be read from that other pixmap.
- *  However, if we do not find one, then we need to save the image data.
- *  The common case for these are for the default stipple and root
- *  tile. */
-static void dmxBESavePixmap(PixmapPtr pPixmap)
-{
-#ifdef PANORAMIX
-    int i;
-
-    /* If Xinerama is not active, there's nothing we can do (see comment
-     * in #else below for more info). */
-    if (noPanoramiXExtension) return;
-
-    FoundPixImage = False;
-    for (i = currentMaxClients; --i >= 0; )
-	if (clients[i])
-	    FindAllClientResources(clients[i], dmxBEFindPixmapImage,
-				   (pointer)pPixmap);
-
-    /* Save the image only if there is no other screens that have a
-     * pixmap that corresponds to the one we are trying to save. */
-    if (!FoundPixImage) {
-	dmxPixPrivPtr  pPixPriv = DMX_GET_PIXMAP_PRIV(pPixmap);
-
-	if (!pPixPriv->detachedImage) {
-	    ScreenPtr      pScreen   = pPixmap->drawable.pScreen;
-	    DMXScreenInfo *dmxScreen = &dmxScreens[pScreen->myNum];
-
-	    pPixPriv->detachedImage = XGetImage(dmxScreen->beDisplay,
-						pPixPriv->pixmap,
-						0, 0,
-						pPixmap->drawable.width,
-						pPixmap->drawable.height,
-						-1,
-						ZPixmap);
-	    if (!pPixPriv->detachedImage)
-		dmxLog(dmxWarning, "Cannot save pixmap image\n");
-	}
-    }
-#else
-    /* NOTE: The only time there is a pixmap on another screen that
-     * corresponds to the one we are trying to save is when Xinerama is
-     * active.  Otherwise, the pixmap image data is only stored on a
-     * single screen, which means that once it is detached, that data is
-     * lost.  We could save the data here, but then that would require
-     * us to implement the ability for Xdmx to keep the pixmap up to
-     * date while the screen is detached, which is beyond the scope of
-     * the current project. */
-    return;
-#endif
-}
-
-/** Destroy resources on the back-end server.  This function is called
- *  from #dmxDetachScreen() via the dix layer's FindAllResources
- *  function.  It walks all resources, compares them to the screen
- *  number passed in as \a n and calls the appropriate DMX function to
- *  free the associated resource on the back-end server. */
-static void dmxBEDestroyResources(pointer value, XID id, RESTYPE type,
-				  pointer n)
-{
-    int        scrnNum = (int)n;
-    ScreenPtr  pScreen = screenInfo.screens[scrnNum];
-
-    if ((type & TypeMask) == (RT_WINDOW & TypeMask)) {
-	/* Window resources are destroyed below in dmxBEDestroyWindowTree */
-    } else if ((type & TypeMask) == (RT_PIXMAP & TypeMask)) {
-	PixmapPtr  pPix = value;
-	if (pPix->drawable.pScreen->myNum == scrnNum) {
-	    dmxBESavePixmap(pPix);
-	    dmxBEFreePixmap(pPix);
-	}
-    } else if ((type & TypeMask) == (RT_GC & TypeMask)) {
-	GCPtr  pGC = value;
-	if (pGC->pScreen->myNum == scrnNum)
-	    dmxBEFreeGC(pGC);
-    } else if ((type & TypeMask) == (RT_FONT & TypeMask)) {
-	dmxBEFreeFont(pScreen, (FontPtr)value);
-    } else if ((type & TypeMask) == (RT_CURSOR & TypeMask)) {
-	dmxBEFreeCursor(pScreen, (CursorPtr)value);
-    } else if ((type & TypeMask) == (RT_COLORMAP & TypeMask)) {
-	ColormapPtr  pCmap = value;
-	if (pCmap->pScreen->myNum == scrnNum)
-	    dmxBEFreeColormap((ColormapPtr)value);
-    } else if ((type & TypeMask) == (PictureType & TypeMask)) {
-	PicturePtr  pPict = value;
-	if (pPict->pDrawable->pScreen->myNum == scrnNum) {
-	    /* Free the pixmaps on the backend if needed */
-	    if (pPict->pDrawable->type == DRAWABLE_PIXMAP) {
-		PixmapPtr pPixmap = (PixmapPtr)(pPict->pDrawable);
-		dmxBESavePixmap(pPixmap);
-		dmxBEFreePixmap(pPixmap);
-	    }
-	    dmxBEFreePicture((PicturePtr)value);
-	}
-    } else if ((type & TypeMask) == (GlyphSetType & TypeMask)) {
-	dmxBEFreeGlyphSet(pScreen, (GlyphSetPtr)value);
-    } else {
-	/* Other resource types??? */
-    }
-}
-
-/** Destroy the scratch GCs that are created per depth. */
-static void dmxBEDestroyScratchGCs(int scrnNum)
-{
-    ScreenPtr  pScreen = screenInfo.screens[scrnNum];
-    GCPtr     *ppGC    = pScreen->GCperDepth;
-    int        i;
-
-    for (i = 0; i <= pScreen->numDepths; i++)
-	dmxBEFreeGC(ppGC[i]);
-}
-
-/** Destroy window hierachy on back-end server.  To ensure that all
- *  XDestroyWindow() calls succeed, they must be performed in a bottom
- *  up order so that windows are not destroyed before their children.
- *  XDestroyWindow(), which is called from #dmxBEDestroyWindow(), will
- *  destroy a window as well as all of it's children. */
-static void dmxBEDestroyWindowTree(int idx)
-{
-    WindowPtr  pWin   = WindowTable[idx];
-    WindowPtr  pChild = pWin;
-
-    while (1) {
-	if (pChild->firstChild) {
-	    pChild = pChild->firstChild;
-	    continue;
-	}
-
-	/* Destroy the window */
-	dmxBEDestroyWindow(pChild);
-
-	/* Make sure we destroy the window's border and background
-	 * pixmaps if they exist */
-	if (!pChild->borderIsPixel) {
-	    dmxBESavePixmap(pChild->border.pixmap);
-	    dmxBEFreePixmap(pChild->border.pixmap);
-	}
-	if (pChild->backgroundState == BackgroundPixmap) {
-	    dmxBESavePixmap(pChild->background.pixmap);
-	    dmxBEFreePixmap(pChild->background.pixmap);
-	}
-
-	while (!pChild->nextSib && (pChild != pWin)) {
-	    pChild = pChild->parent;
-	    dmxBEDestroyWindow(pChild);
-	    if (!pChild->borderIsPixel) {
-		dmxBESavePixmap(pChild->border.pixmap);
-		dmxBEFreePixmap(pChild->border.pixmap);
-	    }
-	    if (pChild->backgroundState == BackgroundPixmap) {
-		dmxBESavePixmap(pChild->background.pixmap);
-		dmxBEFreePixmap(pChild->background.pixmap);
-	    }
-	}
-
-	if (pChild == pWin)
-	    break;
-
-	pChild = pChild->nextSib;
-    }
-}
-
-/** Detach back-end screen. */
-int dmxDetachScreen(int idx)
-{
-    DMXScreenInfo *dmxScreen = &dmxScreens[idx];
-    int            i;
-
-    /* Return failure if dynamic addition/removal of screens is disabled */
-    if (!dmxAddRemoveScreens) {
-	dmxLog(dmxWarning,
-	       "Attempting to remove a screen, but the AddRemoveScreen\n");
-	dmxLog(dmxWarning,
-	       "extension has not been enabled.  To enable this extension\n");
-	dmxLog(dmxWarning,
-	       "add the \"-addremovescreens\" option either to the command\n");
-	dmxLog(dmxWarning,
-	       "line or in the configuration file.\n");
-	return 1;
-    }
-
-    /* Cannot remove a screen that does not exist */
-    if (idx < 0 || idx >= dmxNumScreens) return 1;
-
-    /* Cannot detach from a screen that is not opened */
-    if (!dmxScreen->beDisplay) {
-	dmxLog(dmxWarning,
-	       "Attempting to remove screen #%d but it has not been opened\n",
-	       idx);
-	return 1;
-    }
-
-    dmxLogOutput(dmxScreen, "Detaching screen #%d\n", idx);
-
-    /* Detach input */
-    dmxInputDetachAll(dmxScreen);
-
-    /* Save all relevant state (TODO) */
-
-    /* Free all non-window resources related to this screen */
-    for (i = currentMaxClients; --i >= 0; )
-	if (clients[i])
-	    FindAllClientResources(clients[i], dmxBEDestroyResources,
-				   (pointer)idx);
-
-    /* Free scratch GCs */
-    dmxBEDestroyScratchGCs(idx);
-
-    /* Free window resources related to this screen */
-    dmxBEDestroyWindowTree(idx);
-
-    /* Free default stipple */
-    dmxBESavePixmap(screenInfo.screens[idx]->PixmapPerDepth[0]);
-    dmxBEFreePixmap(screenInfo.screens[idx]->PixmapPerDepth[0]);
-
-    /* Free the remaining screen resources and close the screen */
-    dmxBECloseScreen(screenInfo.screens[idx]);
-
-    /* Adjust the cursor boundaries (paints detached console window) */
-    dmxAdjustCursorBoundaries();
-
-    return 0; /* Success */
-}
+/*

+ * Copyright 2003-2004 Red Hat Inc., Durham, North Carolina.

+ *

+ * All Rights Reserved.

+ *

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

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

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

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

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

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

+ * subject to the following conditions:

+ *

+ * The above copyright notice and this permission notice (including the

+ * next paragraph) shall be included in all copies or substantial

+ * portions of the Software.

+ *

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

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

+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND

+ * NON-INFRINGEMENT.  IN NO EVENT SHALL RED HAT AND/OR THEIR SUPPLIERS

+ * 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.

+ */

+

+/*

+ * Author:

+ *   Rickard E. (Rik) Faith <faith@redhat.com>

+ *   Kevin E. Martin <kem@redhat.com>

+ *

+ */

+

+/** \file

+ * This file provides the only interface to the X server extension support

+ * in programs/Xserver/Xext.  Those programs should only include dmxext.h

+ */

+

+#ifdef HAVE_DMX_CONFIG_H

+#include <dmx-config.h>

+#endif

+

+#include <stdlib.h>

+

+#include "dmx.h"

+#include "dmxinit.h"

+#include "dmxextension.h"

+#include "dmxwindow.h"

+#include "dmxcb.h"

+#include "dmxcursor.h"

+#include "dmxpixmap.h"

+#include "dmxgc.h"

+#include "dmxfont.h"

+#include "dmxcmap.h"

+#include "dmxpict.h"

+#include "dmxinput.h"

+#include "dmxsync.h"

+#include "dmxscrinit.h"

+#include "input/dmxinputinit.h"

+

+#include "windowstr.h"

+#include "inputstr.h"                 /* For DeviceIntRec */

+#include <X11/extensions/dmxproto.h>  /* For DMX_BAD_* */

+#include "cursorstr.h"

+

+/* The default font is declared in dix/globals.c, but is not included in

+ * _any_ header files. */

+extern FontPtr  defaultFont;

+    

+/** This routine provides information to the DMX protocol extension

+ * about a particular screen. */

+Bool dmxGetScreenAttributes(int physical, DMXScreenAttributesPtr attr)

+{

+    DMXScreenInfo *dmxScreen;

+

+    if (physical < 0 || physical >= dmxNumScreens) return FALSE;

+

+    dmxScreen = &dmxScreens[physical];

+    attr->displayName         = dmxScreen->name;

+#ifdef PANORAMIX

+    attr->logicalScreen       = noPanoramiXExtension ? dmxScreen->index : 0;

+#else

+    attr->logicalScreen       = dmxScreen->index;

+#endif

+

+    attr->screenWindowWidth   = dmxScreen->scrnWidth;

+    attr->screenWindowHeight  = dmxScreen->scrnHeight;

+    attr->screenWindowXoffset = dmxScreen->scrnX;

+    attr->screenWindowYoffset = dmxScreen->scrnY;

+

+    attr->rootWindowWidth     = dmxScreen->rootWidth;

+    attr->rootWindowHeight    = dmxScreen->rootHeight;

+    attr->rootWindowXoffset   = dmxScreen->rootX;

+    attr->rootWindowYoffset   = dmxScreen->rootY;

+

+    attr->rootWindowXorigin   = dmxScreen->rootXOrigin;

+    attr->rootWindowYorigin   = dmxScreen->rootYOrigin;

+

+    return TRUE;

+}

+

+/** This routine provides information to the DMX protocol extension

+ * about a particular window. */

+Bool dmxGetWindowAttributes(WindowPtr pWindow, DMXWindowAttributesPtr attr)

+{

+    dmxWinPrivPtr pWinPriv = DMX_GET_WINDOW_PRIV(pWindow);

+

+    attr->screen         = pWindow->drawable.pScreen->myNum;

+    attr->window         = pWinPriv->window;

+

+    attr->pos.x          = pWindow->drawable.x;

+    attr->pos.y          = pWindow->drawable.y;

+    attr->pos.width      = pWindow->drawable.width;

+    attr->pos.height     = pWindow->drawable.height;

+

+    if (!pWinPriv->window || pWinPriv->offscreen) {

+        attr->vis.x      = 0;

+        attr->vis.y      = 0;

+        attr->vis.height = 0;

+        attr->vis.width  = 0;

+        return pWinPriv->window ? TRUE : FALSE;

+    }

+

+                                /* Compute display-relative coordinates */

+    attr->vis.x          = pWindow->drawable.x;

+    attr->vis.y          = pWindow->drawable.y;

+    attr->vis.width      = pWindow->drawable.width;

+    attr->vis.height     = pWindow->drawable.height;

+

+    if (attr->pos.x < 0) {

+        attr->vis.x     -= attr->pos.x;

+        attr->vis.width  = attr->pos.x + attr->pos.width - attr->vis.x;

+    }

+    if (attr->pos.x + attr->pos.width > pWindow->drawable.pScreen->width) {

+        if (attr->pos.x < 0)

+            attr->vis.width  = pWindow->drawable.pScreen->width;

+        else

+            attr->vis.width  = pWindow->drawable.pScreen->width - attr->pos.x;

+    }

+    if (attr->pos.y < 0) {

+        attr->vis.y     -= attr->pos.y;

+        attr->vis.height = attr->pos.y + attr->pos.height - attr->vis.y;

+    }

+    if (attr->pos.y + attr->pos.height > pWindow->drawable.pScreen->height) {

+        if (attr->pos.y < 0)

+            attr->vis.height = pWindow->drawable.pScreen->height;

+        else

+            attr->vis.height = pWindow->drawable.pScreen->height - attr->pos.y;

+    }

+

+                                /* Convert to window-relative coordinates */

+    attr->vis.x -= attr->pos.x;

+    attr->vis.y -= attr->pos.y;

+

+    return TRUE;

+}

+

+void dmxGetDesktopAttributes(DMXDesktopAttributesPtr attr)

+{

+    attr->width  = dmxGlobalWidth;

+    attr->height = dmxGlobalHeight;

+    attr->shiftX = 0;            /* NOTE: The upper left hand corner of */

+    attr->shiftY = 0;            /*       the desktop is always <0,0>. */

+}

+

+/** Return the total number of devices, not just #dmxNumInputs.  The

+ * number returned should be the same as that returned by

+ * XListInputDevices. */

+int dmxGetInputCount(void)

+{

+    int i, total;

+    

+    for (total = i = 0; i < dmxNumInputs; i++) total += dmxInputs[i].numDevs;

+    return total;

+}

+

+/** Return information about the device with id = \a deviceId.  This

+ * information is primarily for the #ProcDMXGetInputAttributes()

+ * function, which does not have access to the appropriate data

+ * structure. */

+int dmxGetInputAttributes(int deviceId, DMXInputAttributesPtr attr)

+{

+    int          i, j;

+    DMXInputInfo *dmxInput;

+

+    if (deviceId < 0) return -1;

+    for (i = 0; i < dmxNumInputs; i++) {

+        dmxInput = &dmxInputs[i];

+        for (j = 0; j < dmxInput->numDevs; j++) {

+            DMXLocalInputInfoPtr dmxLocal = dmxInput->devs[j];

+            if (deviceId != dmxLocal->pDevice->id) continue;

+            attr->isCore             = !!dmxLocal->isCore;

+            attr->sendsCore          = !!dmxLocal->sendsCore;

+            attr->detached           = !!dmxInput->detached;

+            attr->physicalScreen     = -1;

+            attr->physicalId         = -1;

+            attr->name               = NULL;

+            switch (dmxLocal->extType) {

+            case DMX_LOCAL_TYPE_LOCAL:

+                attr->inputType      = 0;

+                break;

+            case DMX_LOCAL_TYPE_CONSOLE:

+                attr->inputType      = 1;

+                attr->name           = dmxInput->name;

+                attr->physicalId     = dmxLocal->deviceId;

+                break;

+            case DMX_LOCAL_TYPE_BACKEND:

+            case DMX_LOCAL_TYPE_COMMON:

+                attr->inputType      = 2;

+                attr->physicalScreen = dmxInput->scrnIdx;

+                attr->name           = dmxInput->name;

+                attr->physicalId     = dmxLocal->deviceId;

+                break;

+            }

+            return 0;           /* Success */

+        }

+    }

+    return -1;                  /* Failure */

+}

+

+/** Reinitialized the cursor boundaries. */

+static void dmxAdjustCursorBoundaries(void)

+{

+    int           i;

+

+    dmxReInitOrigins();

+    dmxInitOverlap();

+    dmxComputeWidthHeight(DMX_NO_RECOMPUTE_BOUNDING_BOX);

+    dmxConnectionBlockCallback();

+    for (i = 0; i < dmxNumInputs; i++) {

+        DMXInputInfo *dmxInput = &dmxInputs[i];

+	if (!dmxInput->detached) dmxInputReInit(dmxInput);

+    }

+

+    dmxCheckCursor();

+

+    for (i = 0; i < dmxNumInputs; i++) {

+        DMXInputInfo *dmxInput = &dmxInputs[i];

+	if (!dmxInput->detached) dmxInputLateReInit(dmxInput);

+    }

+}

+

+/** Add an input with the specified attributes.  If the input is added,

+ * the physical id is returned in \a deviceId. */

+int dmxAddInput(DMXInputAttributesPtr attr, int *id)

+{

+    int retcode = BadValue;

+

+    if (attr->inputType == 1)   /* console */

+        retcode = dmxInputAttachConsole(attr->name, attr->sendsCore, id);

+    else if (attr->inputType == 2)   /* backend */

+        retcode = dmxInputAttachBackend(attr->physicalScreen,

+                                        attr->sendsCore,id);

+

+    if (retcode == Success) {

+        /* Adjust the cursor boundaries */

+        dmxAdjustCursorBoundaries();

+

+        /* Force completion of the changes */

+        dmxSync(NULL, TRUE);

+    }

+

+    return retcode;

+}

+

+/** Remove the input with physical id \a id. */

+int dmxRemoveInput(int id)

+{

+    return dmxInputDetachId(id);

+}

+

+/** Return the value of #dmxNumScreens -- the total number of backend

+ * screens in use (these are logical screens and may be larger than the

+ * number of backend displays). */

+unsigned long dmxGetNumScreens(void)

+{

+    return dmxNumScreens;

+}

+

+/** Make sure that #dmxCreateAndRealizeWindow has been called for \a

+ * pWindow. */

+void dmxForceWindowCreation(WindowPtr pWindow)

+{

+    dmxWinPrivPtr pWinPriv = DMX_GET_WINDOW_PRIV(pWindow);

+    if (!pWinPriv->window) dmxCreateAndRealizeWindow(pWindow, TRUE);

+}

+

+/** Flush pending syncs for all screens. */

+void dmxFlushPendingSyncs(void)

+{

+    dmxSync(NULL, TRUE);

+}

+

+/** Update DMX's screen resources to match those of the newly moved

+ *  and/or resized "root" window. */

+void dmxUpdateScreenResources(ScreenPtr pScreen, int x, int y, int w, int h)

+{

+    DMXScreenInfo *dmxScreen = &dmxScreens[pScreen->myNum];

+    WindowPtr      pRoot     = pScreen->root;

+    WindowPtr      pChild;

+    Bool           anyMarked = FALSE;

+

+    /* Handle special case where width and/or height are zero */

+    if (w == 0 || h == 0) {

+	w = 1;

+	h = 1;

+    }

+

+    /* Change screen size */

+    pScreen->width  = w;

+    pScreen->height = h;

+

+    /* Reset the root window's drawable's size */

+    pRoot->drawable.width  = w;

+    pRoot->drawable.height = h;

+

+    /* Set the root window's new winSize and borderSize */

+    pRoot->winSize.extents.x1 = 0;

+    pRoot->winSize.extents.y1 = 0;

+    pRoot->winSize.extents.x2 = w;

+    pRoot->winSize.extents.y2 = h;

+

+    pRoot->borderSize.extents.x1 = 0;

+    pRoot->borderSize.extents.y1 = 0;

+    pRoot->borderSize.extents.x2 = w;

+    pRoot->borderSize.extents.y2 = h;

+

+    /* Recompute this screen's mmWidth & mmHeight */

+    pScreen->mmWidth =

+	(w * 254 + dmxScreen->beXDPI * 5) / (dmxScreen->beXDPI * 10);

+    pScreen->mmHeight =

+	(h * 254 + dmxScreen->beYDPI * 5) / (dmxScreen->beYDPI * 10);

+

+    /* Recompute this screen's window's clip rects as follows: */

+    /*   1. Mark all of root's children's windows */

+    for (pChild = pRoot->firstChild; pChild; pChild = pChild->nextSib)

+	anyMarked |= pScreen->MarkOverlappedWindows(pChild, pChild,

+						    (WindowPtr *)NULL);

+

+    /*   2. Set the root window's borderClip */

+    pRoot->borderClip.extents.x1 = 0;

+    pRoot->borderClip.extents.y1 = 0;

+    pRoot->borderClip.extents.x2 = w;

+    pRoot->borderClip.extents.y2 = h;

+

+    /*   3. Set the root window's clipList */

+    if (anyMarked) {

+	/* If any windows have been marked, set the root window's

+	 * clipList to be broken since it will be recalculated in

+	 * ValidateTree()

+	 */

+	RegionBreak(&pRoot->clipList);

+    } else {

+	/* Otherwise, we just set it directly since there are no

+	 * windows visible on this screen

+	 */

+	pRoot->clipList.extents.x1 = 0;

+	pRoot->clipList.extents.y1 = 0;

+	pRoot->clipList.extents.x2 = w;

+	pRoot->clipList.extents.y2 = h;

+    }

+

+    /*   4. Revalidate all clip rects and generate expose events */

+    if (anyMarked) {

+	pScreen->ValidateTree(pRoot, NULL, VTBroken);

+	pScreen->HandleExposures(pRoot);

+	if (pScreen->PostValidateTree)

+	    pScreen->PostValidateTree(pRoot, NULL, VTBroken);

+    }

+}

+

+#ifdef PANORAMIX

+#include "panoramiXsrv.h"

+

+/** Change the "screen" window attributes by resizing the actual window

+ *  on the back-end display (if necessary). */

+static void dmxConfigureScreenWindow(int idx,

+				     int x, int y, int w, int h)

+{

+    DMXScreenInfo *dmxScreen = &dmxScreens[idx];

+    ScreenPtr      pScreen   = screenInfo.screens[idx];

+

+    /* Resize "screen" window */

+    if (dmxScreen->scrnX      != x ||

+	dmxScreen->scrnY      != y ||

+	dmxScreen->scrnWidth  != w ||

+	dmxScreen->scrnHeight != h) {

+	dmxResizeScreenWindow(pScreen, x, y, w, h);

+    }

+

+    /* Change "screen" window values */

+    dmxScreen->scrnX      = x;

+    dmxScreen->scrnY      = y;

+    dmxScreen->scrnWidth  = w;

+    dmxScreen->scrnHeight = h;

+}

+				     

+/** Change the "root" window position and size by resizing the actual

+ *  window on the back-end display (if necessary) and updating all of

+ *  DMX's resources by calling #dmxUpdateScreenResources. */

+static void dmxConfigureRootWindow(int idx, int x, int y, int w, int h)

+{

+    DMXScreenInfo *dmxScreen = &dmxScreens[idx];

+    WindowPtr      pRoot     = screenInfo.screens[idx]->root;

+

+    /* NOTE: Either this function or the ones that it calls must handle

+     * the case where w == 0 || h == 0.  Currently, the functions that

+     * this one calls handle that case. */

+

+    /* 1. Resize "root" window */

+    if (dmxScreen->rootX      != x ||

+	dmxScreen->rootY      != y ||

+	dmxScreen->rootWidth  != w ||

+	dmxScreen->rootHeight != h) {

+	dmxResizeRootWindow(pRoot, x, y, w, h);

+    }

+

+    /* 2. Update all of the screen's resources associated with this root

+     *    window */

+    if (dmxScreen->rootWidth  != w ||

+	dmxScreen->rootHeight != h) {

+	dmxUpdateScreenResources(screenInfo.screens[idx], x, y, w, h);

+    }

+

+    /* Change "root" window values */

+    dmxScreen->rootX      = x;

+    dmxScreen->rootY      = y;

+    dmxScreen->rootWidth  = w;

+    dmxScreen->rootHeight = h;

+}

+

+/** Change the "root" window's origin by updating DMX's internal data

+ *  structures (dix and Xinerama) to use the new origin and adjust the

+ *  positions of windows that overlap this "root" window. */

+static void dmxSetRootWindowOrigin(int idx, int x, int y)

+{

+    DMXScreenInfo *dmxScreen = &dmxScreens[idx];

+    ScreenPtr      pScreen   = screenInfo.screens[idx];

+    WindowPtr      pRoot     = pScreen->root;

+    WindowPtr      pChild;

+    int            xoff;

+    int            yoff;

+

+    /* Change "root" window's origin */

+    dmxScreen->rootXOrigin = x;

+    dmxScreen->rootYOrigin = y;

+

+    /* Compute offsets here in case <x,y> has been changed above */

+    xoff = x - pScreen->x;

+    yoff = y - pScreen->y;

+

+    /* Adjust the root window's position */

+    pScreen->x = dmxScreen->rootXOrigin;

+    pScreen->y = dmxScreen->rootYOrigin;

+

+    /* Recalculate the Xinerama regions and data structs */

+    XineramaReinitData(pScreen);

+

+    /* Adjust each of the root window's children */

+    if (!idx) ReinitializeRootWindow(screenInfo.screens[0]->root, xoff, yoff);

+    pChild = pRoot->firstChild;

+    while (pChild) {

+	/* Adjust child window's position */

+	pScreen->MoveWindow(pChild,

+			    pChild->origin.x - wBorderWidth(pChild) - xoff,

+			    pChild->origin.y - wBorderWidth(pChild) - yoff,

+			    pChild->nextSib,

+			    VTMove);

+

+	/* Note that the call to MoveWindow will eventually call

+	 * dmxPositionWindow which will automatically create a

+	 * window if it is now exposed on screen (for lazy window

+	 * creation optimization) and it will properly set the

+	 * offscreen flag.

+	 */

+

+	pChild = pChild->nextSib;

+    }

+}

+

+/** Configure the attributes of each "screen" and "root" window. */

+int dmxConfigureScreenWindows(int nscreens,

+			      CARD32 *screens,

+			      DMXScreenAttributesPtr attribs,

+			      int *errorScreen)

+{

+    int           i;

+

+    for (i = 0; i < nscreens; i++) {

+	DMXScreenAttributesPtr  attr      = &attribs[i];

+	int                     idx       = screens[i];

+	DMXScreenInfo          *dmxScreen = &dmxScreens[idx];

+

+	if (errorScreen) *errorScreen = i;

+

+	if (!dmxScreen->beDisplay) return DMX_BAD_VALUE;

+

+	/* Check for illegal values */

+	if (idx < 0 || idx >= dmxNumScreens) return BadValue;

+

+	/* The "screen" and "root" windows must have valid sizes */

+	if (attr->screenWindowWidth <= 0 || attr->screenWindowHeight <= 0 ||

+	    attr->rootWindowWidth   <  0 || attr->rootWindowHeight   <  0)

+	    return DMX_BAD_VALUE;

+

+	/* The "screen" window must fit entirely within the BE display */

+	if (attr->screenWindowXoffset < 0 ||

+	    attr->screenWindowYoffset < 0 ||

+	    attr->screenWindowXoffset

+	    + attr->screenWindowWidth  > (unsigned)dmxScreen->beWidth ||

+	    attr->screenWindowYoffset

+	    + attr->screenWindowHeight > (unsigned)dmxScreen->beHeight)

+	    return DMX_BAD_VALUE;

+

+	/* The "root" window must fit entirely within the "screen" window */

+	if (attr->rootWindowXoffset < 0 ||

+	    attr->rootWindowYoffset < 0 ||

+	    attr->rootWindowXoffset

+	    + attr->rootWindowWidth  > attr->screenWindowWidth ||

+	    attr->rootWindowYoffset

+	    + attr->rootWindowHeight > attr->screenWindowHeight)

+	    return DMX_BAD_VALUE;

+

+	/* The "root" window must not expose unaddressable coordinates */

+	if (attr->rootWindowXorigin < 0 ||

+	    attr->rootWindowYorigin < 0 ||

+	    attr->rootWindowXorigin + attr->rootWindowWidth  > 32767 ||

+	    attr->rootWindowYorigin + attr->rootWindowHeight > 32767)

+	    return DMX_BAD_VALUE;

+

+	/* The "root" window must fit within the global bounding box */

+	if (attr->rootWindowXorigin

+	    + attr->rootWindowWidth > (unsigned)dmxGlobalWidth ||

+	    attr->rootWindowYorigin

+	    + attr->rootWindowHeight > (unsigned)dmxGlobalHeight)

+	    return DMX_BAD_VALUE;

+

+	/* FIXME: Handle the rest of the illegal value checking */

+    }

+

+    /* No illegal values found */

+    if (errorScreen) *errorScreen = 0;

+

+    for (i = 0; i < nscreens; i++) {

+	DMXScreenAttributesPtr  attr      = &attribs[i];

+	int                     idx       = screens[i];

+	DMXScreenInfo          *dmxScreen = &dmxScreens[idx];

+

+	dmxLog(dmxInfo, "Changing screen #%d attributes "

+	       "from %dx%d+%d+%d %dx%d+%d+%d +%d+%d "

+	       "to %dx%d+%d+%d %dx%d+%d+%d +%d+%d\n",

+	       idx,

+	       dmxScreen->scrnWidth,      dmxScreen->scrnHeight,

+	       dmxScreen->scrnX,          dmxScreen->scrnY,

+	       dmxScreen->rootWidth,      dmxScreen->rootHeight,

+	       dmxScreen->rootX,          dmxScreen->rootY,

+	       dmxScreen->rootXOrigin,    dmxScreen->rootYOrigin,

+	       attr->screenWindowWidth,   attr->screenWindowHeight,

+	       attr->screenWindowXoffset, attr->screenWindowYoffset,

+	       attr->rootWindowWidth,     attr->rootWindowHeight,

+	       attr->rootWindowXoffset,   attr->rootWindowYoffset,

+	       attr->rootWindowXorigin,   attr->rootWindowYorigin);

+

+	/* Configure "screen" window */

+	dmxConfigureScreenWindow(idx,

+				 attr->screenWindowXoffset,

+				 attr->screenWindowYoffset,

+				 attr->screenWindowWidth,

+				 attr->screenWindowHeight);

+

+	/* Configure "root" window */

+	dmxConfigureRootWindow(idx,

+			       attr->rootWindowXoffset,

+			       attr->rootWindowYoffset,

+			       attr->rootWindowWidth,

+			       attr->rootWindowHeight);

+

+

+	/* Set "root" window's origin */

+	dmxSetRootWindowOrigin(idx,

+			       attr->rootWindowXorigin,

+			       attr->rootWindowYorigin);

+    }

+

+    /* Adjust the cursor boundaries */

+    dmxAdjustCursorBoundaries();

+

+    /* Force completion of the changes */

+    dmxSync(NULL, TRUE);

+

+    return Success;

+}

+

+/** Configure the attributes of the global desktop. */

+int dmxConfigureDesktop(DMXDesktopAttributesPtr attribs)

+{

+    if (attribs->width  <= 0 || attribs->width  >= 32767 ||

+	attribs->height <= 0 || attribs->height >= 32767)

+	return DMX_BAD_VALUE;

+

+    /* If the desktop is shrinking, adjust the "root" windows on each

+     * "screen" window to only show the visible desktop.  Also, handle

+     * the special case where the desktop shrinks such that the it no

+     * longer overlaps an portion of a "screen" window. */

+    if (attribs->width < dmxGlobalWidth || attribs->height < dmxGlobalHeight) {

+	int   i;

+	for (i = 0; i < dmxNumScreens; i++) {

+	    DMXScreenInfo *dmxScreen = &dmxScreens[i];

+	    if (dmxScreen->rootXOrigin

+		+ dmxScreen->rootWidth  > attribs->width ||

+		dmxScreen->rootYOrigin

+		+ dmxScreen->rootHeight > attribs->height) {

+		int  w, h;

+		if ((w = attribs->width  - dmxScreen->rootXOrigin) < 0) w = 0;

+		if ((h = attribs->height - dmxScreen->rootYOrigin) < 0) h = 0;

+		if (w > dmxScreen->scrnWidth)  w = dmxScreen->scrnWidth;

+		if (h > dmxScreen->scrnHeight) h = dmxScreen->scrnHeight;

+		if (w > dmxScreen->rootWidth)  w = dmxScreen->rootWidth;

+		if (h > dmxScreen->rootHeight) h = dmxScreen->rootHeight;

+		dmxConfigureRootWindow(i,

+				       dmxScreen->rootX,

+				       dmxScreen->rootY,

+				       w, h);

+	    }

+	}

+    }

+

+    /* Set the global width/height */

+    dmxSetWidthHeight(attribs->width, attribs->height);

+

+    /* Handle shift[XY] changes */

+    if (attribs->shiftX || attribs->shiftY) {

+	int   i;

+	for (i = 0; i < dmxNumScreens; i++) {

+	    ScreenPtr  pScreen = screenInfo.screens[i];

+	    WindowPtr  pChild  = pScreen->root->firstChild;

+	    while (pChild) {

+		/* Adjust child window's position */

+		pScreen->MoveWindow(pChild,

+				    pChild->origin.x - wBorderWidth(pChild)

+				    - attribs->shiftX,

+				    pChild->origin.y - wBorderWidth(pChild)

+				    - attribs->shiftY,

+				    pChild->nextSib,

+				    VTMove);

+

+		/* Note that the call to MoveWindow will eventually call

+		 * dmxPositionWindow which will automatically create a

+		 * window if it is now exposed on screen (for lazy

+		 * window creation optimization) and it will properly

+		 * set the offscreen flag.

+		 */

+

+		pChild = pChild->nextSib;

+	    }

+	}

+    }

+

+    /* Update connection block, Xinerama, etc. -- these appears to

+     * already be handled in dmxConnectionBlockCallback(), which is

+     * called from dmxAdjustCursorBoundaries() [below]. */

+

+    /* Adjust the cursor boundaries */

+    dmxAdjustCursorBoundaries();

+

+    /* Force completion of the changes */

+    dmxSync(NULL, TRUE);

+

+    return Success;

+}

+#endif

+

+/** Create the scratch GCs per depth. */

+static void dmxBECreateScratchGCs(int scrnNum)

+{

+    ScreenPtr  pScreen = screenInfo.screens[scrnNum];

+    GCPtr     *ppGC    = pScreen->GCperDepth;

+    int        i;

+

+    for (i = 0; i <= pScreen->numDepths; i++)

+	dmxBECreateGC(pScreen, ppGC[i]);

+}

+

+#ifdef PANORAMIX

+static Bool FoundPixImage;

+

+/** Search the Xinerama XRT_PIXMAP resources for the pixmap that needs

+ *  to have its image restored.  When it is found, see if there is

+ *  another screen with the same image.  If so, copy the pixmap image

+ *  from the existing screen to the newly created pixmap. */

+static void dmxBERestorePixmapImage(pointer value, XID id, RESTYPE type,

+				    pointer p)

+{

+    if ((type & TypeMask) == (XRT_PIXMAP & TypeMask)) {

+	PixmapPtr      pDst     = (PixmapPtr)p;

+	int            idx      = pDst->drawable.pScreen->myNum;

+	PanoramiXRes  *pXinPix  = (PanoramiXRes *)value;

+	PixmapPtr      pPix;

+	int            i;

+

+	pPix = (PixmapPtr)LookupIDByType(pXinPix->info[idx].id, RT_PIXMAP);

+	if (pPix != pDst) return; /* Not a match.... Next! */

+

+	for (i = 0; i < PanoramiXNumScreens; i++) {

+	    PixmapPtr      pSrc;

+	    dmxPixPrivPtr  pSrcPriv = NULL;

+

+	    if (i == idx) continue; /* Self replication is bad */

+

+	    pSrc =

+		(PixmapPtr)LookupIDByType(pXinPix->info[i].id, RT_PIXMAP);

+	    pSrcPriv = DMX_GET_PIXMAP_PRIV(pSrc);

+	    if (pSrcPriv->pixmap) {

+		DMXScreenInfo *dmxSrcScreen = &dmxScreens[i];

+		DMXScreenInfo *dmxDstScreen = &dmxScreens[idx];

+		dmxPixPrivPtr  pDstPriv = DMX_GET_PIXMAP_PRIV(pDst);

+		XImage        *img;

+		int            j;

+		XlibGC         gc = NULL;

+

+		/* This should never happen, but just in case.... */

+		if (pSrc->drawable.width  != pDst->drawable.width ||

+		    pSrc->drawable.height != pDst->drawable.height)

+		    return;

+

+		/* Copy from src pixmap to dst pixmap */

+		img = XGetImage(dmxSrcScreen->beDisplay,

+				pSrcPriv->pixmap,

+				0, 0,

+				pSrc->drawable.width, pSrc->drawable.height,

+				-1,

+				ZPixmap);

+

+		for (j = 0; j < dmxDstScreen->beNumPixmapFormats; j++) {

+		    if (dmxDstScreen->bePixmapFormats[j].depth == img->depth) {

+			unsigned long  m;

+			XGCValues      v;

+

+			m = GCFunction | GCPlaneMask | GCClipMask;

+			v.function = GXcopy;

+			v.plane_mask = AllPlanes;

+			v.clip_mask = None;

+

+			gc = XCreateGC(dmxDstScreen->beDisplay,

+				       dmxDstScreen->scrnDefDrawables[j],

+				       m, &v);

+			break;

+		    }

+		}

+

+		if (gc) {

+		    XPutImage(dmxDstScreen->beDisplay,

+			      pDstPriv->pixmap,

+			      gc, img, 0, 0, 0, 0,

+			      pDst->drawable.width, pDst->drawable.height);

+		    XFreeGC(dmxDstScreen->beDisplay, gc);

+		    FoundPixImage = True;

+		} else {

+		    dmxLog(dmxWarning, "Could not create GC\n");

+		}

+

+		XDestroyImage(img);

+		return;

+	    }

+	}

+    }

+}

+#endif

+

+/** Restore the pixmap image either from another screen or from an image

+ *  that was saved when the screen was previously detached. */

+static void dmxBERestorePixmap(PixmapPtr pPixmap)

+{

+#ifdef PANORAMIX

+    int i;

+

+    /* If Xinerama is not active, there's nothing we can do (see comment

+     * in #else below for more info). */

+    if (noPanoramiXExtension) {

+	dmxLog(dmxWarning, "Cannot restore pixmap image\n");

+	return;

+    }

+

+    FoundPixImage = False;

+    for (i = currentMaxClients; --i >= 0; )

+	if (clients[i])

+	    FindAllClientResources(clients[i], dmxBERestorePixmapImage,

+				   (pointer)pPixmap);

+

+    /* No corresponding pixmap image was found on other screens, so we

+     * need to copy it from the saved image when the screen was detached

+     * (if available). */

+    if (!FoundPixImage) {

+	dmxPixPrivPtr  pPixPriv = DMX_GET_PIXMAP_PRIV(pPixmap);

+

+	if (pPixPriv->detachedImage) {

+	    ScreenPtr      pScreen   = pPixmap->drawable.pScreen;

+	    DMXScreenInfo *dmxScreen = &dmxScreens[pScreen->myNum];

+	    XlibGC         gc        = NULL;

+

+	    for (i = 0; i < dmxScreen->beNumPixmapFormats; i++) {

+		if (dmxScreen->bePixmapFormats[i].depth ==

+		    pPixPriv->detachedImage->depth) {

+		    unsigned long  m;

+		    XGCValues      v;

+

+		    m = GCFunction | GCPlaneMask | GCClipMask;

+		    v.function = GXcopy;

+		    v.plane_mask = AllPlanes;

+		    v.clip_mask = None;

+

+		    gc = XCreateGC(dmxScreen->beDisplay,

+				   dmxScreen->scrnDefDrawables[i],

+				   m, &v);

+		    break;

+		}

+	    }

+

+	    if (gc) {

+		XPutImage(dmxScreen->beDisplay,

+			  pPixPriv->pixmap,

+			  gc,

+			  pPixPriv->detachedImage,

+			  0, 0, 0, 0,

+		      pPixmap->drawable.width, pPixmap->drawable.height);

+		XFreeGC(dmxScreen->beDisplay, gc);

+	    } else {

+		dmxLog(dmxWarning, "Cannot restore pixmap image\n");

+	    }

+

+	    XDestroyImage(pPixPriv->detachedImage);

+	    pPixPriv->detachedImage = NULL;

+	} else {

+	    dmxLog(dmxWarning, "Cannot restore pixmap image\n");

+	}

+    }

+#else

+    /* If Xinerama is not enabled, then there is no other copy of the

+     * pixmap image that we can restore.  Saving all pixmap data is not

+     * a feasible option since there is no mechanism for updating pixmap

+     * data when a screen is detached, which means that the data that

+     * was previously saved would most likely be out of date. */

+    dmxLog(dmxWarning, "Cannot restore pixmap image\n");

+    return;

+#endif

+}

+

+/** Create resources on the back-end server.  This function is called

+ *  from #dmxAttachScreen() via the dix layer's FindAllResources

+ *  function.  It walks all resources, compares them to the screen

+ *  number passed in as \a n and calls the appropriate DMX function to

+ *  create the associated resource on the back-end server. */

+static void dmxBECreateResources(pointer value, XID id, RESTYPE type,

+				 pointer n)

+{

+    int        scrnNum = (int)n;

+    ScreenPtr  pScreen = screenInfo.screens[scrnNum];

+

+    if ((type & TypeMask) == (RT_WINDOW & TypeMask)) {

+	/* Window resources are created below in dmxBECreateWindowTree */

+    } else if ((type & TypeMask) == (RT_PIXMAP & TypeMask)) {

+	PixmapPtr  pPix = value;

+	if (pPix->drawable.pScreen->myNum == scrnNum) {

+	    dmxBECreatePixmap(pPix);

+	    dmxBERestorePixmap(pPix);

+	}

+    } else if ((type & TypeMask) == (RT_GC & TypeMask)) {

+	GCPtr  pGC = value;

+	if (pGC->pScreen->myNum == scrnNum) {

+	    /* Create the GC on the back-end server */

+	    dmxBECreateGC(pScreen, pGC);

+	    /* Create any pixmaps associated with this GC */

+	    if (!pGC->tileIsPixel) {

+		dmxBECreatePixmap(pGC->tile.pixmap);

+		dmxBERestorePixmap(pGC->tile.pixmap);

+	    }

+	    if (pGC->stipple != pScreen->PixmapPerDepth[0]) {

+		dmxBECreatePixmap(pGC->stipple);

+		dmxBERestorePixmap(pGC->stipple);

+	    }

+	    if (pGC->font != defaultFont) {

+		(void)dmxBELoadFont(pScreen, pGC->font);

+	    }

+	    /* Update the GC on the back-end server */

+	    dmxChangeGC(pGC, -1L);

+	}

+    } else if ((type & TypeMask) == (RT_FONT & TypeMask)) {

+	(void)dmxBELoadFont(pScreen, (FontPtr)value);

+    } else if ((type & TypeMask) == (RT_CURSOR & TypeMask)) {

+	dmxBECreateCursor(pScreen, (CursorPtr)value);

+    } else if ((type & TypeMask) == (RT_COLORMAP & TypeMask)) {

+	ColormapPtr  pCmap = value;

+	if (pCmap->pScreen->myNum == scrnNum)

+	    (void)dmxBECreateColormap((ColormapPtr)value);

+#if 0

+    /* TODO: Recreate Picture and GlyphSet resources */

+    } else if ((type & TypeMask) == (PictureType & TypeMask)) {

+	/* Picture resources are created when windows are created */

+    } else if ((type & TypeMask) == (GlyphSetType & TypeMask)) {

+	dmxBEFreeGlyphSet(pScreen, (GlyphSetPtr)value);

+#endif

+    } else {

+	/* Other resource types??? */

+    }

+}

+

+/** Create window hierachy on back-end server.  The window tree is

+ *  created in a special order (bottom most subwindow first) so that the

+ *  #dmxCreateNonRootWindow() function does not need to recursively call

+ *  itself to create each window's parents.  This is required so that we

+ *  have the opportunity to create each window's border and background

+ *  pixmaps (where appropriate) before the window is created. */

+static void dmxBECreateWindowTree(int idx)

+{

+    DMXScreenInfo *dmxScreen = &dmxScreens[idx];

+    WindowPtr      pRoot     = screenInfo.screens[idx]->root;

+    dmxWinPrivPtr  pWinPriv  = DMX_GET_WINDOW_PRIV(pRoot);

+    WindowPtr      pWin;

+

+    /* Create the pixmaps associated with the root window */

+    if (!pRoot->borderIsPixel) {

+	dmxBECreatePixmap(pRoot->border.pixmap);

+	dmxBERestorePixmap(pRoot->border.pixmap);

+    }

+    if (pRoot->backgroundState == BackgroundPixmap) {

+	dmxBECreatePixmap(pRoot->background.pixmap);

+	dmxBERestorePixmap(pRoot->background.pixmap);

+    }

+

+    /* Create root window first */

+    dmxScreen->rootWin = pWinPriv->window = dmxCreateRootWindow(pRoot);

+    XMapWindow(dmxScreen->beDisplay, dmxScreen->rootWin);

+

+    pWin = pRoot->lastChild;

+    while (pWin) {

+	pWinPriv = DMX_GET_WINDOW_PRIV(pWin);

+

+	/* Create the pixmaps regardless of whether or not the

+	 * window is created or not due to lazy window creation.

+	 */

+	if (!pWin->borderIsPixel) {

+	    dmxBECreatePixmap(pWin->border.pixmap);

+	    dmxBERestorePixmap(pWin->border.pixmap);

+	}

+	if (pWin->backgroundState == BackgroundPixmap) {

+	    dmxBECreatePixmap(pWin->background.pixmap);

+	    dmxBERestorePixmap(pWin->background.pixmap);

+	}

+

+	/* Reset the window attributes */

+	dmxGetDefaultWindowAttributes(pWin,

+				      &pWinPriv->cmap,

+				      &pWinPriv->visual);

+

+	/* Create the window */

+	if (pWinPriv->mapped && !pWinPriv->offscreen)

+	    dmxCreateAndRealizeWindow(pWin, TRUE);

+

+	/* Next, create the bottom-most child */

+	if (pWin->lastChild) {

+	    pWin = pWin->lastChild;

+	    continue;

+	}

+

+	/* If the window has no children, move on to the next higher window */

+	while (!pWin->prevSib && (pWin != pRoot))

+	    pWin = pWin->parent;

+

+	if (pWin->prevSib) {

+	    pWin = pWin->prevSib;

+	    continue;

+	}

+

+	/* When we reach the root window, we are finished */

+	if (pWin == pRoot)

+	    break;

+    }

+}

+

+/* Refresh screen by generating exposure events for all windows */

+static void dmxForceExposures(int idx)

+{

+    ScreenPtr      pScreen   = screenInfo.screens[idx];

+    WindowPtr  pRoot     = pScreen->root;

+    Bool       anyMarked = FALSE;

+    WindowPtr  pChild;

+

+    for (pChild = pRoot->firstChild; pChild; pChild = pChild->nextSib)

+	anyMarked |= pScreen->MarkOverlappedWindows(pChild, pChild,

+						    (WindowPtr *)NULL);

+    if (anyMarked) {

+	/* If any windows have been marked, set the root window's

+	 * clipList to be broken since it will be recalculated in

+	 * ValidateTree()

+	 */

+	RegionBreak(&pRoot->clipList);

+	pScreen->ValidateTree(pRoot, NULL, VTBroken);

+	pScreen->HandleExposures(pRoot);

+	if (pScreen->PostValidateTree)

+	    pScreen->PostValidateTree(pRoot, NULL, VTBroken);

+    }

+}

+

+/** Compare the new and old screens to see if they are compatible. */

+static Bool dmxCompareScreens(DMXScreenInfo *new, DMXScreenInfo *old)

+{

+    int i;

+

+    if (new->beWidth != old->beWidth) return FALSE;

+    if (new->beHeight != old->beHeight) return FALSE;

+    if (new->beDepth != old->beDepth) return FALSE;

+    if (new->beBPP != old->beBPP) return FALSE;

+

+    if (new->beNumDepths != old->beNumDepths) return FALSE;

+    for (i = 0; i < old->beNumDepths; i++)

+	if (new->beDepths[i] != old->beDepths[i]) return FALSE;

+

+    if (new->beNumPixmapFormats != old->beNumPixmapFormats) return FALSE;

+    for (i = 0; i < old->beNumPixmapFormats; i++) {

+	if (new->bePixmapFormats[i].depth !=

+	    old->bePixmapFormats[i].depth) return FALSE;

+	if (new->bePixmapFormats[i].bits_per_pixel !=

+	    old->bePixmapFormats[i].bits_per_pixel) return FALSE;

+	if (new->bePixmapFormats[i].scanline_pad !=

+	    old->bePixmapFormats[i].scanline_pad) return FALSE;

+    }

+

+    if (new->beNumVisuals != old->beNumVisuals) return FALSE;

+    for (i = 0; i < old->beNumVisuals; i++) {

+	if (new->beVisuals[i].visualid !=

+	    old->beVisuals[i].visualid) return FALSE;

+	if (new->beVisuals[i].screen !=

+	    old->beVisuals[i].screen) return FALSE;

+	if (new->beVisuals[i].depth !=

+	    old->beVisuals[i].depth) return FALSE;

+	if (new->beVisuals[i].class !=

+	    old->beVisuals[i].class) return FALSE;

+	if (new->beVisuals[i].red_mask !=

+	    old->beVisuals[i].red_mask) return FALSE;

+	if (new->beVisuals[i].green_mask !=

+	    old->beVisuals[i].green_mask) return FALSE;

+	if (new->beVisuals[i].blue_mask !=

+	    old->beVisuals[i].blue_mask) return FALSE;

+	if (new->beVisuals[i].colormap_size !=

+	    old->beVisuals[i].colormap_size) return FALSE;

+	if (new->beVisuals[i].bits_per_rgb !=

+	    old->beVisuals[i].bits_per_rgb) return FALSE;

+    }

+

+    if (new->beDefVisualIndex != old->beDefVisualIndex) return FALSE;

+

+    return TRUE;

+}

+

+/** Restore Render's picture */

+static void dmxBERestoreRenderPict(pointer value, XID id, pointer n)

+{

+    PicturePtr   pPicture = value;               /* The picture */

+    DrawablePtr  pDraw    = pPicture->pDrawable; /* The picture's drawable */

+    int          scrnNum  = (int)n;

+

+    if (pDraw->pScreen->myNum != scrnNum) {

+	/* Picture not on the screen we are restoring*/

+	return;

+    }

+

+    if (pDraw->type == DRAWABLE_PIXMAP) {

+	PixmapPtr  pPixmap = (PixmapPtr)pDraw;

+	

+	/* Create and restore the pixmap drawable */

+	dmxBECreatePixmap(pPixmap);

+	dmxBERestorePixmap(pPixmap);

+    }

+

+    dmxBECreatePicture(pPicture);

+}

+

+/** Restore Render's glyphs */

+static void dmxBERestoreRenderGlyph(pointer value, XID id, pointer n)

+{

+    GlyphSetPtr      glyphSet   = value;

+    int              scrnNum    = (int)n;

+    dmxGlyphPrivPtr  glyphPriv  = DMX_GET_GLYPH_PRIV(glyphSet);

+    DMXScreenInfo   *dmxScreen  = &dmxScreens[scrnNum];

+    GlyphRefPtr      table;

+    char            *images;

+    Glyph           *gids;

+    XGlyphInfo      *glyphs;

+    char            *pos;

+    int              beret;

+    int              len_images = 0;

+    int              i;

+    int              ctr;

+

+    if (glyphPriv->glyphSets[scrnNum]) {

+	/* Only restore glyphs on the screen we are attaching */

+	return;

+    }

+

+    /* First we must create the glyph set on the backend. */

+    if ((beret = dmxBECreateGlyphSet(scrnNum, glyphSet)) != Success) {

+	dmxLog(dmxWarning,

+	       "\tdmxBERestoreRenderGlyph failed to create glyphset!\n");

+	return;

+    }

+

+    /* Now for the complex part, restore the glyph data */

+    table = glyphSet->hash.table;

+

+    /* We need to know how much memory to allocate for this part */

+    for (i = 0; i < glyphSet->hash.hashSet->size; i++) {

+	GlyphRefPtr  gr = &table[i];

+	GlyphPtr     gl = gr->glyph;

+

+	if (!gl || gl == DeletedGlyph) continue;

+	len_images += gl->size - sizeof(gl->info);

+    }

+

+    /* Now allocate the memory we need */

+    images = calloc(len_images, sizeof(char));

+    gids   = malloc(glyphSet->hash.tableEntries*sizeof(Glyph));

+    glyphs = malloc(glyphSet->hash.tableEntries*sizeof(XGlyphInfo));

+

+    pos = images;

+    ctr = 0;

+    

+    /* Fill the allocated memory with the proper data */

+    for (i = 0; i < glyphSet->hash.hashSet->size; i++) {

+	GlyphRefPtr  gr = &table[i];

+	GlyphPtr     gl = gr->glyph;

+

+	if (!gl || gl == DeletedGlyph) continue;

+

+	/* First lets put the data into gids */

+	gids[ctr] = gr->signature;

+

+	/* Next do the glyphs data structures */

+	glyphs[ctr].width  = gl->info.width;

+	glyphs[ctr].height = gl->info.height;

+	glyphs[ctr].x      = gl->info.x;

+	glyphs[ctr].y      = gl->info.y;

+	glyphs[ctr].xOff   = gl->info.xOff;

+	glyphs[ctr].yOff   = gl->info.yOff;

+

+	/* Copy the images from the DIX's data into the buffer */

+	memcpy(pos, gl+1, gl->size - sizeof(gl->info));

+	pos += gl->size - sizeof(gl->info);

+	ctr++;

+    }

+    

+    /* Now restore the glyph data */

+    XRenderAddGlyphs(dmxScreen->beDisplay, glyphPriv->glyphSets[scrnNum],

+		     gids,glyphs, glyphSet->hash.tableEntries, images,

+		     len_images);

+

+    /* Clean up */

+    free(images);

+    free(gids);

+    free(glyphs);    

+}

+

+/** Reattach previously detached back-end screen. */

+int dmxAttachScreen(int idx, DMXScreenAttributesPtr attr)

+{

+    ScreenPtr      pScreen;

+    DMXScreenInfo *dmxScreen;

+    CARD32         scrnNum   = idx;

+    DMXScreenInfo  oldDMXScreen;

+    int            i;

+

+    /* Return failure if dynamic addition/removal of screens is disabled */

+    if (!dmxAddRemoveScreens) {

+	dmxLog(dmxWarning,

+	       "Attempting to add a screen, but the AddRemoveScreen\n");

+	dmxLog(dmxWarning,

+	       "extension has not been enabled.  To enable this extension\n");

+	dmxLog(dmxWarning,

+	       "add the \"-addremovescreens\" option either to the command\n");

+	dmxLog(dmxWarning,

+	       "line or in the configuration file.\n");

+	return 1;

+    }

+

+    /* Cannot add a screen that does not exist */

+    if (idx < 0 || idx >= dmxNumScreens) return 1;

+    pScreen = screenInfo.screens[idx];

+    dmxScreen = &dmxScreens[idx];

+

+    /* Cannot attach to a screen that is already opened */

+    if (dmxScreen->beDisplay) {

+	dmxLog(dmxWarning,

+	       "Attempting to add screen #%d but a screen already exists\n",

+	       idx);

+	return 1;

+    }

+

+    dmxLogOutput(dmxScreen, "Attaching screen #%d\n", idx);

+

+    /* Save old info */

+    oldDMXScreen = *dmxScreen;

+

+    /* Copy the name to the new screen */

+    dmxScreen->name = strdup(attr->displayName);

+

+    /* Open display and get all of the screen info */

+    if (!dmxOpenDisplay(dmxScreen)) {

+	dmxLog(dmxWarning,

+               "dmxOpenDisplay: Unable to open display %s\n",

+               dmxScreen->name);

+

+	/* Restore the old screen */

+	*dmxScreen = oldDMXScreen;

+	return 1;

+    }

+

+    dmxSetErrorHandler(dmxScreen);

+    dmxCheckForWM(dmxScreen);

+    dmxGetScreenAttribs(dmxScreen);

+

+    if (!dmxGetVisualInfo(dmxScreen)) {

+	dmxLog(dmxWarning, "dmxGetVisualInfo: No matching visuals found\n");

+	XFree(dmxScreen->beVisuals);

+	XCloseDisplay(dmxScreen->beDisplay);

+

+	/* Restore the old screen */

+	*dmxScreen = oldDMXScreen;

+	return 1;

+    }

+

+    dmxGetColormaps(dmxScreen);

+    dmxGetPixmapFormats(dmxScreen);

+

+    /* Verify that the screen to be added has the same info as the

+     * previously added screen. */

+    if (!dmxCompareScreens(dmxScreen, &oldDMXScreen)) {

+	dmxLog(dmxWarning,

+	       "New screen data (%s) does not match previously\n",

+	       dmxScreen->name);

+	dmxLog(dmxWarning,

+	       "attached screen data (%s)\n",

+	       oldDMXScreen.name);

+	dmxLog(dmxWarning,

+	       "All data must match in order to attach to screen #%d\n",

+	       idx);

+	XFree(dmxScreen->beVisuals);

+	XFree(dmxScreen->beDepths);

+	XFree(dmxScreen->bePixmapFormats);

+	XCloseDisplay(dmxScreen->beDisplay);

+

+	/* Restore the old screen */

+	*dmxScreen = oldDMXScreen;

+	return 1;

+    }

+

+    /* Initialize the BE screen resources */

+    dmxBEScreenInit(idx, screenInfo.screens[idx]);

+

+    /* TODO: Handle GLX visual initialization.  GLXProxy needs to be

+     * updated to handle dynamic addition/removal of screens. */

+

+    /* Create default stipple */

+    dmxBECreatePixmap(pScreen->PixmapPerDepth[0]);

+    dmxBERestorePixmap(pScreen->PixmapPerDepth[0]);

+

+    /* Create the scratch GCs */

+    dmxBECreateScratchGCs(idx);

+

+    /* Create the default font */

+    (void)dmxBELoadFont(pScreen, defaultFont);

+

+    /* Create all resources that don't depend on windows */

+    for (i = currentMaxClients; --i >= 0; )

+	if (clients[i])

+	    FindAllClientResources(clients[i], dmxBECreateResources,

+				   (pointer)idx);

+

+    /* Create window hierarchy (top down) */

+    dmxBECreateWindowTree(idx);

+

+    /* Restore the picture state for RENDER */

+    for (i = currentMaxClients; --i >= 0; )

+	if (clients[i])

+	    FindClientResourcesByType(clients[i],PictureType, 

+				      dmxBERestoreRenderPict,(pointer)idx);

+

+    /* Restore the glyph state for RENDER */

+    for (i = currentMaxClients; --i >= 0; )

+	if (clients[i])

+	    FindClientResourcesByType(clients[i],GlyphSetType, 

+				      dmxBERestoreRenderGlyph,(pointer)idx);

+

+    /* Refresh screen by generating exposure events for all windows */

+    dmxForceExposures(idx);

+

+    dmxSync(&dmxScreens[idx], TRUE);

+

+    /* We used these to compare the old and new screens.  They are no

+     * longer needed since we have a newly attached screen, so we can

+     * now free the old screen's resources. */

+    XFree(oldDMXScreen.beVisuals);

+    XFree(oldDMXScreen.beDepths);

+    XFree(oldDMXScreen.bePixmapFormats);

+    /* TODO: should oldDMXScreen.name be freed?? */

+

+#ifdef PANORAMIX

+    if (!noPanoramiXExtension)

+	return dmxConfigureScreenWindows(1, &scrnNum, attr, NULL);

+    else

+#endif

+	return 0; /* Success */

+}

+

+/*

+ * Resources that may have state on the BE server and need to be freed:

+ *

+ * RT_NONE

+ * RT_WINDOW

+ * RT_PIXMAP

+ * RT_GC

+ * RT_FONT

+ * RT_CURSOR

+ * RT_COLORMAP

+ * RT_CMAPENTRY

+ * RT_OTHERCLIENT

+ * RT_PASSIVEGRAB

+ * XRT_WINDOW

+ * XRT_PIXMAP

+ * XRT_GC

+ * XRT_COLORMAP

+ * XRT_PICTURE

+ * PictureType

+ * PictFormatType

+ * GlyphSetType

+ * ClientType

+ * EventType

+ * RT_INPUTCLIENT

+ * XETrapType

+ * RTCounter

+ * RTAwait

+ * RTAlarmClient

+ * RT_XKBCLIENT

+ * RTContext

+ * TagResType

+ * StalledResType

+ * SecurityAuthorizationResType

+ * RTEventClient

+ * __glXContextRes

+ * __glXClientRes

+ * __glXPixmapRes

+ * __glXWindowRes

+ * __glXPbufferRes

+ */

+

+#ifdef PANORAMIX

+/** Search the Xinerama XRT_PIXMAP resources for the pixmap that needs

+ *  to have its image saved. */

+static void dmxBEFindPixmapImage(pointer value, XID id, RESTYPE type,

+				 pointer p)

+{

+    if ((type & TypeMask) == (XRT_PIXMAP & TypeMask)) {

+	PixmapPtr      pDst     = (PixmapPtr)p;

+	int            idx      = pDst->drawable.pScreen->myNum;

+	PanoramiXRes  *pXinPix  = (PanoramiXRes *)value;

+	PixmapPtr      pPix;

+	int            i;

+

+	pPix = (PixmapPtr)LookupIDByType(pXinPix->info[idx].id, RT_PIXMAP);

+	if (pPix != pDst) return; /* Not a match.... Next! */

+

+	for (i = 0; i < PanoramiXNumScreens; i++) {

+	    PixmapPtr      pSrc;

+	    dmxPixPrivPtr  pSrcPriv = NULL;

+

+	    if (i == idx) continue; /* Self replication is bad */

+

+	    pSrc =

+		(PixmapPtr)LookupIDByType(pXinPix->info[i].id, RT_PIXMAP);

+	    pSrcPriv = DMX_GET_PIXMAP_PRIV(pSrc);

+	    if (pSrcPriv->pixmap) {

+		FoundPixImage = True;

+		return;

+	    }

+	}

+    }

+}

+#endif

+

+/** Save the pixmap image only when there is not another screen with

+ *  that pixmap from which the image can be read when the screen is

+ *  reattached.  To do this, we first try to find a pixmap on another

+ *  screen corresponding to the one we are trying to save.  If we find

+ *  one, then we do not need to save the image data since during

+ *  reattachment, the image data can be read from that other pixmap.

+ *  However, if we do not find one, then we need to save the image data.

+ *  The common case for these are for the default stipple and root

+ *  tile. */

+static void dmxBESavePixmap(PixmapPtr pPixmap)

+{

+#ifdef PANORAMIX

+    int i;

+

+    /* If Xinerama is not active, there's nothing we can do (see comment

+     * in #else below for more info). */

+    if (noPanoramiXExtension) return;

+

+    FoundPixImage = False;

+    for (i = currentMaxClients; --i >= 0; )

+	if (clients[i])

+	    FindAllClientResources(clients[i], dmxBEFindPixmapImage,

+				   (pointer)pPixmap);

+

+    /* Save the image only if there is no other screens that have a

+     * pixmap that corresponds to the one we are trying to save. */

+    if (!FoundPixImage) {

+	dmxPixPrivPtr  pPixPriv = DMX_GET_PIXMAP_PRIV(pPixmap);

+

+	if (!pPixPriv->detachedImage) {

+	    ScreenPtr      pScreen   = pPixmap->drawable.pScreen;

+	    DMXScreenInfo *dmxScreen = &dmxScreens[pScreen->myNum];

+

+	    pPixPriv->detachedImage = XGetImage(dmxScreen->beDisplay,

+						pPixPriv->pixmap,

+						0, 0,

+						pPixmap->drawable.width,

+						pPixmap->drawable.height,

+						-1,

+						ZPixmap);

+	    if (!pPixPriv->detachedImage)

+		dmxLog(dmxWarning, "Cannot save pixmap image\n");

+	}

+    }

+#else

+    /* NOTE: The only time there is a pixmap on another screen that

+     * corresponds to the one we are trying to save is when Xinerama is

+     * active.  Otherwise, the pixmap image data is only stored on a

+     * single screen, which means that once it is detached, that data is

+     * lost.  We could save the data here, but then that would require

+     * us to implement the ability for Xdmx to keep the pixmap up to

+     * date while the screen is detached, which is beyond the scope of

+     * the current project. */

+    return;

+#endif

+}

+

+/** Destroy resources on the back-end server.  This function is called

+ *  from #dmxDetachScreen() via the dix layer's FindAllResources

+ *  function.  It walks all resources, compares them to the screen

+ *  number passed in as \a n and calls the appropriate DMX function to

+ *  free the associated resource on the back-end server. */

+static void dmxBEDestroyResources(pointer value, XID id, RESTYPE type,

+				  pointer n)

+{

+    int        scrnNum = (int)n;

+    ScreenPtr  pScreen = screenInfo.screens[scrnNum];

+

+    if ((type & TypeMask) == (RT_WINDOW & TypeMask)) {

+	/* Window resources are destroyed below in dmxBEDestroyWindowTree */

+    } else if ((type & TypeMask) == (RT_PIXMAP & TypeMask)) {

+	PixmapPtr  pPix = value;

+	if (pPix->drawable.pScreen->myNum == scrnNum) {

+	    dmxBESavePixmap(pPix);

+	    dmxBEFreePixmap(pPix);

+	}

+    } else if ((type & TypeMask) == (RT_GC & TypeMask)) {

+	GCPtr  pGC = value;

+	if (pGC->pScreen->myNum == scrnNum)

+	    dmxBEFreeGC(pGC);

+    } else if ((type & TypeMask) == (RT_FONT & TypeMask)) {

+	dmxBEFreeFont(pScreen, (FontPtr)value);

+    } else if ((type & TypeMask) == (RT_CURSOR & TypeMask)) {

+	dmxBEFreeCursor(pScreen, (CursorPtr)value);

+    } else if ((type & TypeMask) == (RT_COLORMAP & TypeMask)) {

+	ColormapPtr  pCmap = value;

+	if (pCmap->pScreen->myNum == scrnNum)

+	    dmxBEFreeColormap((ColormapPtr)value);

+    } else if ((type & TypeMask) == (PictureType & TypeMask)) {

+	PicturePtr  pPict = value;

+	if (pPict->pDrawable->pScreen->myNum == scrnNum) {

+	    /* Free the pixmaps on the backend if needed */

+	    if (pPict->pDrawable->type == DRAWABLE_PIXMAP) {

+		PixmapPtr pPixmap = (PixmapPtr)(pPict->pDrawable);

+		dmxBESavePixmap(pPixmap);

+		dmxBEFreePixmap(pPixmap);

+	    }

+	    dmxBEFreePicture((PicturePtr)value);

+	}

+    } else if ((type & TypeMask) == (GlyphSetType & TypeMask)) {

+	dmxBEFreeGlyphSet(pScreen, (GlyphSetPtr)value);

+    } else {

+	/* Other resource types??? */

+    }

+}

+

+/** Destroy the scratch GCs that are created per depth. */

+static void dmxBEDestroyScratchGCs(int scrnNum)

+{

+    ScreenPtr  pScreen = screenInfo.screens[scrnNum];

+    GCPtr     *ppGC    = pScreen->GCperDepth;

+    int        i;

+

+    for (i = 0; i <= pScreen->numDepths; i++)

+	dmxBEFreeGC(ppGC[i]);

+}

+

+/** Destroy window hierachy on back-end server.  To ensure that all

+ *  XDestroyWindow() calls succeed, they must be performed in a bottom

+ *  up order so that windows are not destroyed before their children.

+ *  XDestroyWindow(), which is called from #dmxBEDestroyWindow(), will

+ *  destroy a window as well as all of it's children. */

+static void dmxBEDestroyWindowTree(int idx)

+{

+    WindowPtr  pWin   = screenInfo.screens[idx]->root;

+    WindowPtr  pChild = pWin;

+

+    while (1) {

+	if (pChild->firstChild) {

+	    pChild = pChild->firstChild;

+	    continue;

+	}

+

+	/* Destroy the window */

+	dmxBEDestroyWindow(pChild);

+

+	/* Make sure we destroy the window's border and background

+	 * pixmaps if they exist */

+	if (!pChild->borderIsPixel) {

+	    dmxBESavePixmap(pChild->border.pixmap);

+	    dmxBEFreePixmap(pChild->border.pixmap);

+	}

+	if (pChild->backgroundState == BackgroundPixmap) {

+	    dmxBESavePixmap(pChild->background.pixmap);

+	    dmxBEFreePixmap(pChild->background.pixmap);

+	}

+

+	while (!pChild->nextSib && (pChild != pWin)) {

+	    pChild = pChild->parent;

+	    dmxBEDestroyWindow(pChild);

+	    if (!pChild->borderIsPixel) {

+		dmxBESavePixmap(pChild->border.pixmap);

+		dmxBEFreePixmap(pChild->border.pixmap);

+	    }

+	    if (pChild->backgroundState == BackgroundPixmap) {

+		dmxBESavePixmap(pChild->background.pixmap);

+		dmxBEFreePixmap(pChild->background.pixmap);

+	    }

+	}

+

+	if (pChild == pWin)

+	    break;

+

+	pChild = pChild->nextSib;

+    }

+}

+

+/** Detach back-end screen. */

+int dmxDetachScreen(int idx)

+{

+    DMXScreenInfo *dmxScreen = &dmxScreens[idx];

+    int            i;

+

+    /* Return failure if dynamic addition/removal of screens is disabled */

+    if (!dmxAddRemoveScreens) {

+	dmxLog(dmxWarning,

+	       "Attempting to remove a screen, but the AddRemoveScreen\n");

+	dmxLog(dmxWarning,

+	       "extension has not been enabled.  To enable this extension\n");

+	dmxLog(dmxWarning,

+	       "add the \"-addremovescreens\" option either to the command\n");

+	dmxLog(dmxWarning,

+	       "line or in the configuration file.\n");

+	return 1;

+    }

+

+    /* Cannot remove a screen that does not exist */

+    if (idx < 0 || idx >= dmxNumScreens) return 1;

+

+    /* Cannot detach from a screen that is not opened */

+    if (!dmxScreen->beDisplay) {

+	dmxLog(dmxWarning,

+	       "Attempting to remove screen #%d but it has not been opened\n",

+	       idx);

+	return 1;

+    }

+

+    dmxLogOutput(dmxScreen, "Detaching screen #%d\n", idx);

+

+    /* Detach input */

+    dmxInputDetachAll(dmxScreen);

+

+    /* Save all relevant state (TODO) */

+

+    /* Free all non-window resources related to this screen */

+    for (i = currentMaxClients; --i >= 0; )

+	if (clients[i])

+	    FindAllClientResources(clients[i], dmxBEDestroyResources,

+				   (pointer)idx);

+

+    /* Free scratch GCs */

+    dmxBEDestroyScratchGCs(idx);

+

+    /* Free window resources related to this screen */

+    dmxBEDestroyWindowTree(idx);

+

+    /* Free default stipple */

+    dmxBESavePixmap(screenInfo.screens[idx]->PixmapPerDepth[0]);

+    dmxBEFreePixmap(screenInfo.screens[idx]->PixmapPerDepth[0]);

+

+    /* Free the remaining screen resources and close the screen */

+    dmxBECloseScreen(screenInfo.screens[idx]);

+

+    /* Adjust the cursor boundaries (paints detached console window) */

+    dmxAdjustCursorBoundaries();

+

+    return 0; /* Success */

+}