xserver/hw/dmx/dmxscrinit.c

/*
 * Copyright 2001-2004 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.
 */

/*
 * Authors:
 *   Kevin E. Martin <kem@redhat.com>
 *   David H. Dawes <dawes@xfree86.org>
 *
 */

/** \file
 * This file provides support for screen initialization. */

#ifdef HAVE_DMX_CONFIG_H
#include <dmx-config.h>
#endif

#include "dmx.h"
#include "dmxextension.h"
#include "dmxsync.h"
#include "dmxshadow.h"
#include "dmxscrinit.h"
#include "dmxcursor.h"
#include "dmxgc.h"
#include "dmxgcops.h"
#include "dmxwindow.h"
#include "dmxpixmap.h"
#include "dmxfont.h"
#include "dmxcmap.h"
#include "dmxprop.h"
#include "dmxdpms.h"
#include "dmxlog.h"
#include "dmxcb.h"

#ifdef RENDER
#include "dmxpict.h"
#endif

#ifdef RANDR
#include "randrstr.h"
#endif

#include "fb.h"
#include "mipointer.h"
#include "micmap.h"
#include "mivalidate.h"

#ifdef MITSHM
#include "shmint.h"
static void
dmxShmPutImage (DrawablePtr  dst,
		GCPtr	     pGC,
		int	     depth,
		unsigned int format,
		int	     w,
		int	     h,
		int	     sx,
		int	     sy,
		int	     sw,
		int	     sh,
		int	     dx,
		int	     dy,
		char	     *data)
{
    PixmapPtr pmap;
    GCPtr putGC;

    putGC = GetScratchGC(depth, dst->pScreen);
    if (!putGC)
	return;
    pmap = (*dst->pScreen->CreatePixmap)(dst->pScreen, sw, sh, depth,
					 CREATE_PIXMAP_USAGE_SCRATCH);
    if (!pmap)
    {
	FreeScratchGC(putGC);
	return;
    }
    ValidateGC((DrawablePtr)pmap, putGC);
    (*putGC->ops->PutImage)((DrawablePtr)pmap, putGC, depth, -sx, -sy, w, h, 0,
			    (format == XYPixmap) ? XYPixmap : ZPixmap, data);
    FreeScratchGC(putGC);
    if (format == XYBitmap)
	(void)(*pGC->ops->CopyPlane)((DrawablePtr)pmap, dst, pGC, 0, 0, sw, sh,
				     dx, dy, 1L);
    else
	(void)(*pGC->ops->CopyArea)((DrawablePtr)pmap, dst, pGC, 0, 0, sw, sh,
				    dx, dy);
    (*pmap->drawable.pScreen->DestroyPixmap)(pmap);
}
static ShmFuncs shmFuncs = { NULL, dmxShmPutImage };
#endif

extern Bool dmxCloseScreen(int idx, ScreenPtr pScreen);
static Bool dmxSaveScreen(ScreenPtr pScreen, int what);

static unsigned long dmxGeneration;
static unsigned long *dmxCursorGeneration;

static int dmxGCPrivateKeyIndex;
DevPrivateKey dmxGCPrivateKey = &dmxGCPrivateKey; /**< Private index for GCs       */
static int dmxWinPrivateKeyIndex;
DevPrivateKey dmxWinPrivateKey = &dmxWinPrivateKeyIndex; /**< Private index for Windows   */
static int dmxPixPrivateKeyIndex;
DevPrivateKey dmxPixPrivateKey = &dmxPixPrivateKeyIndex; /**< Private index for Pixmaps   */
int dmxFontPrivateIndex;        /**< Private index for Fonts     */
static int dmxScreenPrivateKeyIndex;
DevPrivateKey dmxScreenPrivateKey = &dmxScreenPrivateKeyIndex; /**< Private index for Screens   */
static int dmxColormapPrivateKeyIndex;
DevPrivateKey dmxColormapPrivateKey = &dmxColormapPrivateKeyIndex; /**< Private index for Colormaps */
#ifdef RENDER
static int dmxPictPrivateKeyIndex;
DevPrivateKey dmxPictPrivateKey = &dmxPictPrivateKeyIndex; /**< Private index for Picts     */
static int dmxGlyphSetPrivateKeyIndex;
DevPrivateKey dmxGlyphSetPrivateKey = &dmxGlyphSetPrivateKeyIndex; /**< Private index for GlyphSets */
#endif

#ifdef RANDR
static int xRROutputsForFirstScreen = 1;
static int xRRCrtcsForFirstScreen = 1;

static DMXScreenInfo *
dmxRRGetScreenForCrtc (ScreenPtr pScreen,
		       RRCrtcPtr crtc)
{
    int i;

    rrScrPriv (pScreen);

    for (i = 0; i < pScrPriv->numCrtcs; i++)
	if (pScrPriv->crtcs[i] == crtc)
	    break;

    if (i == pScrPriv->numCrtcs)
	return NULL;

    if (i < xRRCrtcsForFirstScreen)
	return dmxScreens;

    return &dmxScreens[((i - xRRCrtcsForFirstScreen) / xRRCrtcsPerScreen) + 1];
}

static DMXScreenInfo *
dmxRRGetScreenForOutput (ScreenPtr   pScreen,
			 RROutputPtr output)
{
    int i;

    rrScrPriv (pScreen);

    for (i = 0; i < pScrPriv->numOutputs; i++)
	if (pScrPriv->outputs[i] == output)
	    break;

    if (i == pScrPriv->numOutputs)
	return NULL;

    if (i < xRROutputsForFirstScreen)
	return dmxScreens;

    return &dmxScreens[((i - xRROutputsForFirstScreen) / xRROutputsPerScreen) +
		       1];
}

static RRModePtr
dmxRRGetMode (XRRScreenResources *r,
	      unsigned long	 mode)
{
    xRRModeInfo modeInfo;
    int		i;

    for (i = 0; i < r->nmode; i++)
    {
	if (r->modes[i].id == mode)
	{
	    memset (&modeInfo, '\0', sizeof (modeInfo));

	    modeInfo.width      = r->modes[i].width;
	    modeInfo.height     = r->modes[i].height;
	    modeInfo.dotClock   = r->modes[i].dotClock;
	    modeInfo.hSyncStart = r->modes[i].hSyncStart;
	    modeInfo.hSyncEnd   = r->modes[i].hSyncEnd;
	    modeInfo.hTotal     = r->modes[i].hTotal;
	    modeInfo.hSkew      = r->modes[i].hSkew;
	    modeInfo.vSyncStart = r->modes[i].vSyncStart;
	    modeInfo.vSyncEnd   = r->modes[i].vSyncEnd;
	    modeInfo.vTotal     = r->modes[i].vTotal;
	    modeInfo.nameLength = strlen (r->modes[i].name);
	    modeInfo.modeFlags  = r->modes[i].modeFlags;

	    return RRModeGet (&modeInfo, r->modes[i].name);
	}
    }

    return NULL;
}

static RRCrtcPtr
dmxRRGetCrtc (ScreenPtr     pScreen,
	      DMXScreenInfo *dmxScreen,
	      unsigned long crtc)
{
    int baseCrtc = 0;
    int numCrtc = xRRCrtcsForFirstScreen;
    int i;

    rrScrPriv (pScreen);

    if (!crtc)
	return NULL;

    if (dmxScreen != dmxScreens)
    {
	baseCrtc = xRRCrtcsForFirstScreen +
	    ((dmxScreen - dmxScreens) - 1) * xRRCrtcsPerScreen;
	numCrtc  = xRRCrtcsPerScreen;
    }

    for (i = 0; i < numCrtc; i++)
	if (pScrPriv->crtcs[baseCrtc + i]->devPrivate == (void *) crtc)
	    return pScrPriv->crtcs[baseCrtc + i];

    return NULL;
}

static RROutputPtr
dmxRRGetOutput (ScreenPtr     pScreen,
		DMXScreenInfo *dmxScreen,
		unsigned long output)
{
    int baseOutput = 0;
    int numOutput = xRROutputsForFirstScreen;
    int i;

    rrScrPriv (pScreen);

    if (!output)
	return NULL;

    if (dmxScreen != dmxScreens)
    {
	baseOutput = xRROutputsForFirstScreen +
	    ((dmxScreen - dmxScreens) - 1) * xRROutputsPerScreen;
	numOutput  = xRROutputsPerScreen;
    }

    for (i = 0; i < numOutput; i++)
	if (pScrPriv->outputs[baseOutput + i]->devPrivate == (void *) output)
	    return pScrPriv->outputs[baseOutput + i];

    return NULL;
}

static Bool
dmxRRUpdateCrtc (ScreenPtr	    pScreen,
		 DMXScreenInfo      *dmxScreen,
		 XRRScreenResources *r,
		 unsigned long	    xcrtc)
{
    XRRCrtcInfo   *c = NULL;
    RRCrtcPtr	  crtc;
    RRModePtr	  mode = NULL;
    RROutputPtr	  *outputs = NULL;
    XRRCrtcGamma  *gamma = NULL;
    int		  i, noutput = 0;

    crtc = dmxRRGetCrtc (pScreen, dmxScreen, xcrtc);
    if (!crtc)
	return TRUE; /* do nothing if the crtc doesn't exist */

    XLIB_PROLOGUE (dmxScreen);
    c = XRRGetCrtcInfo (dmxScreen->beDisplay, r, xcrtc);
    XLIB_EPILOGUE (dmxScreen);

    if (!c)
	return FALSE;

    if (c->noutput)
    {
	outputs = xalloc (sizeof (RROutputPtr) * c->noutput);
	if (!outputs)
	    return FALSE;
    }

    if (c->mode)
	mode = dmxRRGetMode (r, c->mode);

    for (i = 0; i < c->noutput; i++)
    {
	outputs[noutput] = dmxRRGetOutput (pScreen, dmxScreen, c->outputs[i]);
	if (outputs[noutput])
	    noutput++;
    }

    XLIB_PROLOGUE (dmxScreen);
    gamma = XRRGetCrtcGamma (dmxScreen->beDisplay, xcrtc);
    XLIB_EPILOGUE (dmxScreen);

    if (!gamma)
	return FALSE;

    RRCrtcGammaSet (crtc, gamma->red, gamma->green, gamma->blue);

    XRRFreeGamma (gamma);

    RRCrtcNotify (crtc, mode, c->x, c->y, c->rotation, noutput, outputs);

    if (outputs)
	xfree (outputs);

    XRRFreeCrtcInfo (c);

    return TRUE;
}

static Bool
dmxRRUpdateOutput (ScreenPtr	      pScreen,
		   DMXScreenInfo      *dmxScreen,
		   XRRScreenResources *r,
		   unsigned long      xoutput)
{
    XRROutputInfo *o = NULL;
    RROutputPtr	  output, *clones = NULL;
    RRModePtr	  *modes = NULL;
    RRCrtcPtr	  *crtcs = NULL;
    int		  i, nclone = 0, ncrtc = 0;

    output = dmxRRGetOutput (pScreen, dmxScreen, xoutput);
    if (!output)
	return TRUE; /* do nothing if the output doesn't exist */

    XLIB_PROLOGUE (dmxScreen);
    o = XRRGetOutputInfo (dmxScreen->beDisplay, r, xoutput);
    XLIB_EPILOGUE (dmxScreen);

    if (!o)
	return FALSE;

    if (o->nclone)
    {
	clones = xalloc (sizeof (RROutputPtr) * o->nclone);
	if (!clones)
	    return FALSE;
    }

    if (o->nmode)
    {
	modes = xalloc (sizeof (RRModePtr) * o->nmode);
	if (!modes)
	    return FALSE;
    }

    if (o->ncrtc)
    {
	crtcs = xalloc (sizeof (RRCrtcPtr) * o->ncrtc);
	if (!crtcs)
	    return FALSE;
    }

    for (i = 0; i < o->nclone; i++)
    {
	clones[nclone] = dmxRRGetOutput (pScreen, dmxScreen, o->clones[i]);
	if (clones[nclone])
	    nclone++;
    }

    for (i = 0; i < o->ncrtc; i++)
    {
	crtcs[ncrtc] = dmxRRGetCrtc (pScreen, dmxScreen, o->crtcs[i]);
	if (crtcs[ncrtc])
	    ncrtc++;
    }

    for (i = 0; i < o->nmode; i++)
    {
	modes[i] = dmxRRGetMode (r, o->modes[i]);
	if (!modes[i])
	    return FALSE;
    }

    if (!RROutputSetClones (output, clones, nclone))
	return FALSE;

    if (!RROutputSetModes (output, modes, o->nmode, o->npreferred))
	return FALSE;

    if (!RROutputSetCrtcs (output, crtcs, ncrtc))
	return FALSE;

    if (!RROutputSetConnection (output, o->connection))
	return FALSE;

    if (!RROutputSetSubpixelOrder (output, o->subpixel_order))
	return FALSE;

    if (!RROutputSetPhysicalSize (output, o->mm_width, o->mm_height))
	return FALSE;

    if (clones)
	xfree (clones);

    if (modes)
	xfree (modes);

    if (crtcs)
	xfree (crtcs);

    XRRFreeOutputInfo (o);

    return TRUE;
}

static Bool
dmxRRUpdateOutputProperty (ScreenPtr	      pScreen,
			   DMXScreenInfo      *dmxScreen,
			   XRRScreenResources *r,
			   unsigned long      xoutput,
			   unsigned long      xproperty)
{
    RROutputPtr     output;
    XRRPropertyInfo *info = NULL;
    unsigned char   *prop;
    int		    format, status = !Success;
    unsigned long   nElements, bytesAfter;
    Atom	    type, atom;
    char	    *name = NULL;
    INT32           *values = NULL;

    output = dmxRRGetOutput (pScreen, dmxScreen, xoutput);
    if (!output)
	return TRUE; /* do nothing if the output doesn't exist */

    XLIB_PROLOGUE (dmxScreen);
    name = XGetAtomName (dmxScreen->beDisplay, xproperty);
    XLIB_EPILOGUE (dmxScreen);

    if (!name)
	return FALSE;

    atom = MakeAtom (name, strlen (name), TRUE);

    XFree (name);

    XLIB_PROLOGUE (dmxScreen);
    status = XRRGetOutputProperty (dmxScreen->beDisplay, xoutput, xproperty,
				   0, 8192, FALSE, FALSE,
				   AnyPropertyType, &type, &format,
				   &nElements, &bytesAfter, &prop);
    XLIB_EPILOGUE (dmxScreen);

    if (status != Success)
	return FALSE;

    XLIB_PROLOGUE (dmxScreen);
    info = XRRQueryOutputProperty (dmxScreen->beDisplay, xoutput, xproperty);
    XLIB_EPILOGUE (dmxScreen);

    if (!info)
	return FALSE;

    if (info->num_values)
    {
	int i;

	values = xalloc (info->num_values * sizeof (INT32));
	if (!values)
	    return FALSE;

	for (i = 0; i < info->num_values; i++)
	    values[i] = info->values[i];
    }

    if (type == XA_ATOM && format == 32)
    {
	INT32 *atoms = (INT32 *) prop;
	int   i;

	for (i = 0; i < nElements; i++)
	{
	    name = NULL;

	    XLIB_PROLOGUE (dmxScreen);
	    name = XGetAtomName (dmxScreen->beDisplay, atoms[i]);
	    XLIB_EPILOGUE (dmxScreen);

	    if (!name)
		return FALSE;

	    atoms[i] = MakeAtom (name, strlen (name), TRUE);

	    XFree (name);
	}

	if (!info->range && info->num_values > 0)
	{
	    for (i = 0; i < info->num_values; i++)
	    {
		name = NULL;

		XLIB_PROLOGUE (dmxScreen);
		name = XGetAtomName (dmxScreen->beDisplay, values[i]);
		XLIB_EPILOGUE (dmxScreen);

		if (!name)
		    return FALSE;

		values[i] = MakeAtom (name, strlen (name), TRUE);

		XFree (name);
	    }
	}
    }

    RRConfigureOutputProperty (output, atom, FALSE,
			       info->range, info->immutable, info->num_values,
			       values);

    RRChangeOutputProperty (output, atom, type, format, PropModeReplace,
			    nElements, prop, FALSE, TRUE);

    if (values)
	xfree (values);

    XFree (info);
    XFree (prop);

    return TRUE;
}

static Bool
dmxRRGetInfo (ScreenPtr pScreen,
	      Rotation  *rotations)
{
    int	i;

    rrScrPriv (pScreen);

    if (pScreen->myNum)
    {
	*rotations = RR_Rotate_0;
	return TRUE;
    }

    for (i = 0; i < dmxNumScreens; i++)
    {
	DMXScreenInfo      *dmxScreen = &dmxScreens[i];
	XRRScreenResources *r = NULL;
	int		   outputsPerScreen = xRROutputsForFirstScreen;
	int		   baseOutput = 0;
	int		   crtcsPerScreen = xRRCrtcsForFirstScreen;
	int		   baseCrtc = 0;
	int		   j;

	if (i)
	{
	    outputsPerScreen = xRROutputsPerScreen;
	    baseOutput       = xRROutputsForFirstScreen +
		(i - 1) * xRROutputsPerScreen;
	    crtcsPerScreen   = xRRCrtcsPerScreen;
	    baseCrtc         = xRRCrtcsForFirstScreen +
		(i - 1) * xRRCrtcsPerScreen;
	}

	assert (baseOutput + outputsPerScreen <= pScrPriv->numOutputs);
	assert (baseCrtc + crtcsPerScreen <= pScrPriv->numCrtcs);

	dmxScreen->beRandrPending = TRUE;

	if (dmxScreen->beRandr && dmxScreen->beDisplay)
	{
	    XLIB_PROLOGUE (dmxScreen);
	    r = XRRGetScreenResources (dmxScreen->beDisplay,
				       DefaultRootWindow (dmxScreen->beDisplay));
	    XLIB_EPILOGUE (dmxScreen);

	    if (r)
	    {
		if (r->noutput > outputsPerScreen)
		    dmxLog (dmxWarning,
			    "dmxRRGetInfo: ignoring %d BE server outputs\n",
			    r->noutput - outputsPerScreen);

		if (r->ncrtc > crtcsPerScreen)
		    dmxLog (dmxWarning,
			    "dmxRRGetInfo: ignoring %d BE server crtcs\n",
			    r->ncrtc - crtcsPerScreen);
	    }
	}

	for (j = 0; j < outputsPerScreen; j++)
	{
	    RROutputPtr output = pScrPriv->outputs[baseOutput + j];

	    if (r && j < r->noutput)
		output->devPrivate = (void *) r->outputs[j];
	    else
		output->devPrivate = NULL;
	}

	for (j = 0; j < crtcsPerScreen; j++)
	{
	    RRCrtcPtr crtc = pScrPriv->crtcs[baseCrtc + j];

	    crtc->devPrivate = NULL;

	    if (r && j < r->ncrtc)
		crtc->devPrivate = (void *) r->crtcs[j];
	    else
		crtc->devPrivate = NULL;
	}

	for (j = 0; j < outputsPerScreen; j++)
	{
	    RROutputPtr output = pScrPriv->outputs[baseOutput + j];

	    if (r)
	    {
		if (j < r->noutput)
		{
#ifdef _XSERVER64
		    Atom64 *props = NULL;
#else
		    Atom   *props = NULL;
#endif

		    int    nProp = 0, k;

		    if (!dmxRRUpdateOutput (pScreen,
					    dmxScreen,
					    r,
					    r->outputs[j]))
			return (dmxScreen->beRandrPending = FALSE);

		    XLIB_PROLOGUE (dmxScreen);
		    props = XRRListOutputProperties (dmxScreen->beDisplay,
						     r->outputs[j],
						     &nProp);
		    XLIB_EPILOGUE (dmxScreen);

		    if (nProp)
		    {
			for (k = 0; k < nProp; k++)
			    if (!dmxRRUpdateOutputProperty (pScreen,
							    dmxScreen,
							    r,
							    r->outputs[j],
							    props[k]))
				return (dmxScreen->beRandrPending = FALSE);

			XFree (props);
		    }
		}
		else
		{
		    if (!RROutputSetModes (output, NULL, 0, 0))
			return (dmxScreen->beRandrPending = FALSE);
		    if (!RROutputSetClones (output, NULL, 0))
			return (dmxScreen->beRandrPending = FALSE);
		    if (!RROutputSetCrtcs (output, NULL, 0))
			return (dmxScreen->beRandrPending = FALSE);
		    if (!RROutputSetConnection (output, RR_Disconnected))
			return (dmxScreen->beRandrPending = FALSE);
		}
	    }
	    else if (dmxScreen->beDisplay && j == 0)
	    {
		RRModePtr   mode;
		xRRModeInfo modeInfo;
		char	    name[64];

		sprintf (name,
			 "%dx%d",
			 dmxScreen->beWidth, dmxScreen->beHeight);

		memset (&modeInfo, '\0', sizeof (modeInfo));
		modeInfo.width = dmxScreen->beWidth;
		modeInfo.height = dmxScreen->beHeight;
		modeInfo.nameLength = strlen (name);

		mode = RRModeGet (&modeInfo, name);
		if (!mode)
		    return (dmxScreen->beRandrPending = FALSE);

		if (!RROutputSetModes (output, &mode, 1, 0))
		    return (dmxScreen->beRandrPending = FALSE);
		if (!RROutputSetClones (output, NULL, 0))
		    return (dmxScreen->beRandrPending = FALSE);
		if (!RROutputSetCrtcs (output, &pScrPriv->crtcs[baseCrtc], 1))
		    return (dmxScreen->beRandrPending = FALSE);
		if (!RROutputSetConnection (output, RR_Connected))
		    return (dmxScreen->beRandrPending = FALSE);
	    }
	    else
	    {
		if (!RROutputSetModes (output, NULL, 0, 0))
		    return (dmxScreen->beRandrPending = FALSE);
		if (!RROutputSetClones (output, NULL, 0))
		    return (dmxScreen->beRandrPending = FALSE);
		if (!RROutputSetCrtcs (output, NULL, 0))
		    return (dmxScreen->beRandrPending = FALSE);
		if (!RROutputSetConnection (output, RR_Disconnected))
		    return FALSE;
	    }
	}

	for (j = 0; j < crtcsPerScreen; j++)
	{
	    RRCrtcPtr crtc = pScrPriv->crtcs[baseCrtc + j];

	    if (r)
	    {
		if (j < r->ncrtc)
		{
		    if (!dmxRRUpdateCrtc (pScreen, dmxScreen, r, r->crtcs[j]))
			return (dmxScreen->beRandrPending = FALSE);
		}
		else
		{
		    RRCrtcNotify (crtc, NULL, 0, 0, RR_Rotate_0, 0, NULL);
		}
	    }
	    else if (dmxScreen->beDisplay && j == 0)
	    {
		RRModePtr   mode;
		xRRModeInfo modeInfo;
		char	    name[64];

		sprintf (name,
			 "%dx%d",
			 dmxScreen->beWidth, dmxScreen->beHeight);

		memset (&modeInfo, '\0', sizeof (modeInfo));
		modeInfo.width = dmxScreen->beWidth;
		modeInfo.height = dmxScreen->beHeight;
		modeInfo.nameLength = strlen (name);

		mode = RRModeGet (&modeInfo, name);
		if (!mode)
		    return (dmxScreen->beRandrPending = FALSE);

		RRCrtcNotify (crtc, mode, 0, 0, RR_Rotate_0, 1,
			      &pScrPriv->outputs[baseOutput]);
	    }
	    else
	    {
		RRCrtcNotify (crtc, NULL, 0, 0, RR_Rotate_0, 0, NULL);
	    }
	}

	if (r)
	    XRRFreeScreenResources (r);

	dmxScreen->beRandrPending = FALSE;
    }

    *rotations = RR_Rotate_0;

    for (i = 0; i < pScrPriv->numCrtcs; i++)
	*rotations |= pScrPriv->crtcs[i]->rotations;

    return TRUE;
}

static unsigned long
dmxRRGetXMode (XRRScreenResources *r,
	       RRModePtr	  mode)
{
    xRRModeInfo modeInfo = mode->mode;
    int		i;

    for (i = 0; i < r->nmode; i++)
    {
	if (modeInfo.width      == r->modes[i].width	  &&
	    modeInfo.height     == r->modes[i].height	  &&
	    modeInfo.dotClock   == r->modes[i].dotClock	  &&
	    modeInfo.hSyncStart == r->modes[i].hSyncStart &&
	    modeInfo.hSyncEnd   == r->modes[i].hSyncEnd	  &&
	    modeInfo.hTotal     == r->modes[i].hTotal	  &&
	    modeInfo.hSkew      == r->modes[i].hSkew	  &&
	    modeInfo.vSyncStart == r->modes[i].vSyncStart &&
	    modeInfo.vSyncEnd   == r->modes[i].vSyncEnd	  &&
	    modeInfo.vTotal     == r->modes[i].vTotal	  &&
	    modeInfo.nameLength == r->modes[i].nameLength &&
	    modeInfo.modeFlags  == r->modes[i].modeFlags)
	{
	    if (!memcmp (r->modes[i].name, mode->name, modeInfo.nameLength))
		return r->modes[i].id;
	}
    }

    return None;
}

static Bool
dmxRRScreenSetSize (ScreenPtr pScreen,
		    CARD16    width,
		    CARD16    height,
		    CARD32    mmWidth,
		    CARD32    mmHeight)
{
    DMXDesktopAttributesRec attr;

    dmxGetDesktopAttributes (&attr);

    if (attr.width != width || attr.height != height)
    {
	attr.width  = width;
	attr.height = height;

	if (dmxConfigureDesktop (&attr) != Success)
	    return FALSE;
    }

    pScreen->mmWidth  = mmWidth;
    pScreen->mmHeight = mmHeight;

    RRScreenSizeNotify (pScreen);

    return TRUE;
}

static Bool
dmxRRCrtcSet (ScreenPtr   pScreen,
	      RRCrtcPtr   crtc,
	      RRModePtr   mode,
	      int	  x,
	      int	  y,
	      Rotation    rotation,
	      int	  numOutputs,
	      RROutputPtr *outputs)
{
    XRRScreenResources *r = NULL;

#ifdef _XSERVER64
    RROutput64	       *o = NULL;
#else
    RROutput	       *o = NULL;
#endif

    RRMode	       m = None;
    Status	       status = !RRSetConfigSuccess;
    int		       i;
    DMXScreenInfo      *dmxScreen;

    dmxScreen = dmxRRGetScreenForCrtc (pScreen, crtc);
    if (!dmxScreen)
	return FALSE;

    if (dmxScreen->beRandrPending)
	return RRCrtcNotify (crtc, mode, x, y, rotation, numOutputs, outputs);

    for (i = 0; i < numOutputs; i++)
	if (!dmxRRGetOutput (pScreen,
			     dmxScreen,
			     (unsigned long) outputs[i]->devPrivate))
	    return FALSE;

    if (numOutputs)
    {
	o = xalloc (sizeof (*o) * numOutputs);
	if (!o)
	    return FALSE;
    }

    XLIB_PROLOGUE (dmxScreen);
    r = XRRGetScreenResources (dmxScreen->beDisplay,
			       DefaultRootWindow (dmxScreen->beDisplay));
    XLIB_EPILOGUE (dmxScreen);

    if (!r)
	return FALSE;

    if (mode)
    {
	m = dmxRRGetXMode (r, mode);
	if (!m)
	{
	    XRRFreeScreenResources (r);
	    if (o)
		xfree (o);

	    return FALSE;
	}
    }

    for (i = 0; i < numOutputs; i++)
	o[i] = (unsigned long) outputs[i]->devPrivate;

    XLIB_PROLOGUE (dmxScreen);
    status = XRRSetCrtcConfig (dmxScreen->beDisplay, r,
			       (unsigned long) crtc->devPrivate,
			       CurrentTime,
			       x, y,
			       m,
			       rotation,
			       o, numOutputs);
    XLIB_EPILOGUE (dmxScreen);

    XRRFreeScreenResources (r);

    if (o)
	xfree (o);

    if (status != RRSetConfigSuccess)
	return FALSE;

    return RRCrtcNotify (crtc, mode, x, y, rotation, numOutputs, outputs);
}

static Bool
dmxRRCrtcSetGamma (ScreenPtr pScreen,
		   RRCrtcPtr crtc)
{
    XRRCrtcGamma  *gamma;
    DMXScreenInfo *dmxScreen;

    dmxScreen = dmxRRGetScreenForCrtc (pScreen, crtc);
    if (!dmxScreen)
	return FALSE;

    if (dmxScreen->beRandrPending)
	return TRUE;

    gamma = XRRAllocGamma (crtc->gammaSize);
    if (!gamma)
	return FALSE;

    memcpy (gamma->red,   crtc->gammaRed,   gamma->size * sizeof (CARD16));
    memcpy (gamma->green, crtc->gammaGreen, gamma->size * sizeof (CARD16));
    memcpy (gamma->blue,  crtc->gammaBlue,  gamma->size * sizeof (CARD16));

    XLIB_PROLOGUE (dmxScreen);
    XRRSetCrtcGamma (dmxScreen->beDisplay, (unsigned long) crtc->devPrivate,
		     gamma);
    XLIB_EPILOGUE (dmxScreen);

    XRRFreeGamma (gamma);

    return TRUE;
}

static Bool
dmxRROutputSetProperty (ScreenPtr	   pScreen,
			RROutputPtr	   output,
			Atom	           property,
			RRPropertyValuePtr value)
{
    RRPropertyPtr p;

#ifdef _XSERVER64
    Atom64	  atom = 0, type = 0;
#else
    Atom	  atom = 0, type = 0;
#endif

    long	  *values = value->data;
    long	  *validValues;
    int		  i;
    DMXScreenInfo *dmxScreen;

    dmxScreen = dmxRRGetScreenForOutput (pScreen, output);
    if (!dmxScreen)
	return FALSE;

    if (dmxScreen->beRandrPending)
	return TRUE;

    p = RRQueryOutputProperty (output, property);
    if (!p)
	return FALSE;

    validValues = p->valid_values;

    XLIB_PROLOGUE (dmxScreen);
    atom = XInternAtom (dmxScreen->beDisplay, NameForAtom (property), FALSE);
    type = XInternAtom (dmxScreen->beDisplay, NameForAtom (value->type),
			FALSE);
    XLIB_EPILOGUE (dmxScreen);

    if (type == XA_ATOM && value->format == 32)
    {
	INT32 *atoms = (INT32 *) value->data;

	for (i = 0; i < value->size; i++)
	    if (!ValidAtom (atoms[i]))
		return FALSE;

	if (p->num_valid > 0)
	{
	    for (i = 0; i < p->num_valid; i++)
		if (!ValidAtom (p->valid_values[i]))
		    return FALSE;

	    for (i = 0; i < value->size; i++)
	    {
		int j;

		for (j = 0; j < p->num_valid; j++)
		    if (p->valid_values[j] == atoms[i])
			break;

		if (j == p->num_valid)
		    return FALSE;
	    }

	    validValues = xalloc (p->num_valid * sizeof (long));
	    if (!validValues)
		return FALSE;

	    for (i = 0; i < p->num_valid; i++)
	    {
		XLIB_PROLOGUE (dmxScreen);
		validValues[i] = XInternAtom (dmxScreen->beDisplay,
					      NameForAtom (p->valid_values[i]),
					      FALSE);
		XLIB_EPILOGUE (dmxScreen);
	    }
	}

	if (value->size)
	{
	    int size = value->size * (value->format / 8);

	    values = xalloc (size);
	    if (!values)
		return FALSE;

	    for (i = 0; i < value->size; i++)
	    {
		XLIB_PROLOGUE (dmxScreen);
		values[i] = XInternAtom (dmxScreen->beDisplay,
					 NameForAtom (atoms[i]),
					 FALSE);
		XLIB_EPILOGUE (dmxScreen);
	    }
	}
    }
    else
    {
	if (p->num_valid > 0)
	{
	    validValues = xalloc (p->num_valid * sizeof (long));
	    if (!validValues)
		return FALSE;

	    for (i = 0; i < p->num_valid; i++)
		validValues[i] = p->valid_values[i];
	}
    }

    XLIB_PROLOGUE (dmxScreen);
    XRRConfigureOutputProperty (dmxScreen->beDisplay,
				(unsigned long) output->devPrivate,
				atom, p->is_pending, p->range, p->num_valid,
				validValues);
    XRRChangeOutputProperty (dmxScreen->beDisplay,
			     (unsigned long) output->devPrivate,
			     atom, type, value->format, PropModeReplace,
			     (unsigned char *) values, value->size);
    XLIB_EPILOGUE (dmxScreen);

    if (validValues != p->valid_values)
	xfree (validValues);

    if (values != value->data)
	xfree (values);

    return TRUE;
}

static Bool
dmxRROutputValidateMode (ScreenPtr   pScreen,
			 RROutputPtr output,
			 RRModePtr   mode)
{
    XRRModeInfo   *modeInfo;

#ifdef _XSERVER64
    RRMode64      m = 0;
#else
    RRMode        m = 0;
#endif

    DMXScreenInfo *dmxScreen;

    dmxScreen = dmxRRGetScreenForOutput (pScreen, output);
    if (!dmxScreen)
	return FALSE;

    if (dmxScreen->beRandrPending)
	return TRUE;

    modeInfo = XRRAllocModeInfo (mode->name, mode->mode.nameLength);
    if (!modeInfo)
	return FALSE;

    modeInfo->width      = mode->mode.width;
    modeInfo->height     = mode->mode.height;
    modeInfo->dotClock   = mode->mode.dotClock;
    modeInfo->hSyncStart = mode->mode.hSyncStart;
    modeInfo->hSyncEnd   = mode->mode.hSyncEnd;
    modeInfo->hTotal     = mode->mode.hTotal;
    modeInfo->hSkew      = mode->mode.hSkew;
    modeInfo->vSyncStart = mode->mode.vSyncStart;
    modeInfo->vSyncEnd   = mode->mode.vSyncEnd;
    modeInfo->vTotal     = mode->mode.vTotal;
    modeInfo->modeFlags  = mode->mode.modeFlags;

    XLIB_PROLOGUE (dmxScreen);
    m = XRRCreateMode (dmxScreen->beDisplay,
		       DefaultRootWindow (dmxScreen->beDisplay),
		       modeInfo);
    XLIB_EPILOGUE (dmxScreen);

    if (!m)
	return FALSE;

    XRRFreeModeInfo (modeInfo);

    XLIB_PROLOGUE (dmxScreen);
    XRRAddOutputMode (dmxScreen->beDisplay,
		      (unsigned long) output->devPrivate, m);
    XLIB_EPILOGUE (dmxScreen);

    return TRUE;
}

static void
dmxRRModeDestroy (ScreenPtr pScreen,
		  RRModePtr mode)
{
    XRRScreenResources *r;
    int		       i;

    for (i = 0; i < dmxNumScreens; i++)
    {
	DMXScreenInfo *dmxScreen = &dmxScreens[i];

	if (!dmxScreen->beRandr)
	    continue;

	if (dmxScreen->beRandrPending)
	    continue;

	r = NULL;

	XLIB_PROLOGUE (dmxScreen);
	r = XRRGetScreenResources (dmxScreen->beDisplay,
				   DefaultRootWindow (dmxScreen->beDisplay));
	XLIB_EPILOGUE (dmxScreen);

	if (r)
	{

#ifdef _XSERVER64
	    RRMode64 m;
#else
	    RRMode   m;
#endif

	    m = dmxRRGetXMode (r, mode);
	    if (m)
	    {
		XLIB_PROLOGUE (dmxScreen);
		XRRDestroyMode (dmxScreen->beDisplay, m);
		XLIB_EPILOGUE (dmxScreen);
	    }

	    XRRFreeScreenResources (r);
	}
    }
}

static void
dmxRRCheckScreen (ScreenPtr pScreen)
{
    DMXScreenInfo *dmxScreen = &dmxScreens[pScreen->myNum];

    if (dmxScreen->beDisplay)
    {
	XEvent X;
	Bool   changed = FALSE;

	for (;;)
	{
	    Bool status = FALSE;

	    XLIB_PROLOGUE (dmxScreen);
	    status = XCheckTypedEvent (dmxScreen->beDisplay, ConfigureNotify, &X);
	    XLIB_EPILOGUE (dmxScreen);

	    if (!status)
		break;

	    XRRUpdateConfiguration (&X);

	    dmxScreen->beWidth =
		DisplayWidth (dmxScreen->beDisplay,
			      DefaultScreen (dmxScreen->beDisplay));
	    dmxScreen->beHeight =
		DisplayHeight (dmxScreen->beDisplay,
			       DefaultScreen (dmxScreen->beDisplay));

	    if (dmxScreen->beRandr)
	    {
		DMXScreenAttributesRec attr;
		CARD32		       scrnNum = dmxScreen->index;

		memset (&attr, 0, sizeof (attr));

		attr.screenWindowWidth  = dmxGlobalWidth;
		attr.screenWindowHeight = dmxGlobalHeight;

		if (attr.screenWindowWidth > dmxScreen->beWidth)
		    attr.screenWindowWidth = dmxScreen->beWidth;
		if (attr.screenWindowHeight > dmxScreen->beHeight)
		    attr.screenWindowHeight = dmxScreen->beHeight;

		attr.rootWindowWidth  = attr.screenWindowWidth;
		attr.rootWindowHeight = attr.screenWindowHeight;

		dmxConfigureScreenWindows (1, &scrnNum, &attr, NULL);
	    }

	    changed = TRUE;
	}

	if (dmxScreen->beRandr)
	{
	    for (;;)
	    {
		Bool status = FALSE;

		XLIB_PROLOGUE (dmxScreen);
		status = XCheckTypedEvent (dmxScreen->beDisplay,
					   dmxScreen->beRandrEventBase +
					   RRScreenChangeNotify,
					   &X);
		XLIB_EPILOGUE (dmxScreen);

		if (!status)
		    break;

		XRRUpdateConfiguration (&X);

		changed = TRUE;
	    }

	    for (;;)
	    {
		Bool status = FALSE;

		XLIB_PROLOGUE (dmxScreen);
		status = XCheckTypedEvent (dmxScreen->beDisplay,
					   dmxScreen->beRandrEventBase + RRNotify,
					   &X);
		XLIB_EPILOGUE (dmxScreen);

		if (!status)
		    break;

		XRRUpdateConfiguration (&X);

		changed = TRUE;
	    }
	}

	if (changed)
	    RRGetInfo (screenInfo.screens[0]);
    }
}

static Bool
dmxRRInit (ScreenPtr pScreen)
{
    rrScrPrivPtr pScrPriv;

    if (!RRScreenInit (pScreen))
	return FALSE;

    pScrPriv = rrGetScrPriv (pScreen);
    pScrPriv->rrGetInfo            = dmxRRGetInfo;
    pScrPriv->rrScreenSetSize      = dmxRRScreenSetSize;
    pScrPriv->rrCrtcSet	           = dmxRRCrtcSet;
    pScrPriv->rrCrtcSetGamma       = dmxRRCrtcSetGamma;
    pScrPriv->rrOutputSetProperty  = dmxRROutputSetProperty;
    pScrPriv->rrOutputValidateMode = dmxRROutputValidateMode;
    pScrPriv->rrModeDestroy	   = dmxRRModeDestroy;

    RRScreenSetSizeRange (pScreen, 1, 1, SHRT_MAX, SHRT_MAX);

    if (pScreen->myNum)
    {
	char name[64];
	int  i;

	for (i = 0; i < xRROutputsPerScreen; i++)
	{
	    sprintf (name,
		     "dmx%d",
		     (pScreen->myNum - 1) * xRROutputsPerScreen + i);

	    if (!RROutputCreate (screenInfo.screens[0],
				 name,
				 strlen (name),
				 NULL))
		return FALSE;
	}

	for (i = 0; i < xRRCrtcsPerScreen; i++)
	    if (!RRCrtcCreate (screenInfo.screens[0], NULL))
		return FALSE;
    }
    else
    {
	XRRScreenResources *r = NULL;

	if (dmxScreens->beDisplay && dmxScreens->beRandr)
	{
	    XLIB_PROLOGUE (dmxScreens);
	    r = XRRGetScreenResources (dmxScreens->beDisplay,
				       DefaultRootWindow (dmxScreens->beDisplay));
	    XLIB_EPILOGUE (dmxScreens);
	}

	if (r)
	{
	    int i;

	    xRROutputsForFirstScreen = r->noutput;
	    xRRCrtcsForFirstScreen   = r->ncrtc;

	    for (i = 0; i < r->noutput; i++)
	    {
		XRROutputInfo *o;

		o = XRRGetOutputInfo (dmxScreens->beDisplay, r, r->outputs[i]);
		if (!o)
		    return FALSE;

		if (!RROutputCreate (screenInfo.screens[0],
				     o->name, strlen (o->name),
				     NULL))
		    return FALSE;
	    }

	    for (i = 0; i < r->ncrtc; i++)
		if (!RRCrtcCreate (screenInfo.screens[0], NULL))
		    return FALSE;

	    XRRFreeScreenResources (r);
	}
	else
	{
	    if (!RROutputCreate (screenInfo.screens[0], "default", 7, NULL))
		return FALSE;

	    if (!RRCrtcCreate (screenInfo.screens[0], NULL))
		return FALSE;
	}
    }

    return TRUE;
}

#endif

/** Initialize the parts of screen \a idx that require access to the
 *  back-end server. */
void dmxBEScreenInit(int idx, ScreenPtr pScreen)
{
    DMXScreenInfo        *dmxScreen = &dmxScreens[idx];
    XSetWindowAttributes  attribs;
    XGCValues             gcvals;
    unsigned long         mask;
    int                   i, j;

    /* FIXME: The dmxScreenInit() code currently assumes that it will
     * not be called if the Xdmx server is started with this screen
     * detached -- i.e., it assumes that dmxScreen->beDisplay is always
     * valid.  This is not necessarily a valid assumption when full
     * addition/removal of screens is implemented, but when this code is
     * broken out for screen reattachment, then we will reevaluate this
     * assumption.
     */

    pScreen->mmWidth = DisplayWidthMM(dmxScreen->beDisplay, 
				      DefaultScreen(dmxScreen->beDisplay));
    pScreen->mmHeight = DisplayHeightMM(dmxScreen->beDisplay, 
					DefaultScreen(dmxScreen->beDisplay));

    pScreen->whitePixel = dmxScreen->beWhitePixel;
    pScreen->blackPixel = dmxScreen->beBlackPixel;

    /* Handle screen savers and DPMS on the backend */
    dmxDPMSInit(dmxScreen);

    /* Create root window for screen */
    mask = CWBackPixel | CWEventMask | CWColormap | CWOverrideRedirect;
    attribs.background_pixel = dmxScreen->beBlackPixel;
    attribs.event_mask = (KeyPressMask
                          | KeyReleaseMask
                          | ButtonPressMask
                          | ButtonReleaseMask
                          | EnterWindowMask
                          | LeaveWindowMask
                          | PointerMotionMask
                          | KeymapStateMask
                          | FocusChangeMask);
    attribs.colormap = dmxScreen->beDefColormaps[dmxScreen->beDefVisualIndex];
    attribs.override_redirect = True;

    
    dmxScreen->scrnWin =
	XCreateWindow(dmxScreen->beDisplay, 
		      DefaultRootWindow(dmxScreen->beDisplay),
		      dmxScreen->scrnX,
		      dmxScreen->scrnY,
		      dmxScreen->scrnWidth,
		      dmxScreen->scrnHeight,
		      0,
		      pScreen->rootDepth,
		      InputOutput,
		      dmxScreen->beVisuals[dmxScreen->beDefVisualIndex].visual,
		      mask,
		      &attribs);
    dmxPropertyWindow(dmxScreen);

    /*
     * This turns off the cursor by defining a cursor with no visible
     * components.
     */
    if (1) {
	char noCursorData[] = {0, 0, 0, 0,
			       0, 0, 0, 0};
	Pixmap pixmap;
	XColor color, tmp;

	pixmap = XCreateBitmapFromData(dmxScreen->beDisplay, dmxScreen->scrnWin,
				       noCursorData, 8, 8);
	XAllocNamedColor(dmxScreen->beDisplay, dmxScreen->beDefColormaps[0],
			 "black", &color, &tmp);
	dmxScreen->noCursor = XCreatePixmapCursor(dmxScreen->beDisplay,
						  pixmap, pixmap,
						  &color, &color, 0, 0);
	XDefineCursor(dmxScreen->beDisplay, dmxScreen->scrnWin,
		      dmxScreen->noCursor);

	XFreePixmap(dmxScreen->beDisplay, pixmap);
    }

#ifdef RANDR
    XSelectInput (dmxScreen->beDisplay,
		  DefaultRootWindow (dmxScreen->beDisplay),
		  StructureNotifyMask);

    if (dmxScreen->beRandr)
	XRRSelectInput (dmxScreen->beDisplay,
			DefaultRootWindow (dmxScreen->beDisplay),
			RRScreenChangeNotifyMask |
			RRCrtcChangeNotifyMask	 |
			RROutputChangeNotifyMask |
			RROutputPropertyNotifyMask);
#endif

    XMapWindow (dmxScreen->beDisplay, dmxScreen->scrnWin);

    XSetInputFocus (dmxScreen->beDisplay, dmxScreen->scrnWin,
		    RevertToPointerRoot,
		    CurrentTime);

    if (dmxShadowFB) {
	mask = (GCFunction
		| GCPlaneMask
		| GCClipMask);
	gcvals.function = GXcopy;
	gcvals.plane_mask = AllPlanes;
	gcvals.clip_mask = None;

	dmxScreen->shadowGC = XCreateGC(dmxScreen->beDisplay,
					dmxScreen->scrnWin,
					mask, &gcvals);

	dmxScreen->shadowFBImage =
	    XCreateImage(dmxScreen->beDisplay,
			 dmxScreen->beVisuals[dmxScreen->beDefVisualIndex].visual,
			 dmxScreen->beDepth,
			 ZPixmap,
			 0,
			 (char *)dmxScreen->shadow,
			 dmxScreen->scrnWidth, dmxScreen->scrnHeight,
			 dmxScreen->beBPP,
			 PixmapBytePad(dmxScreen->scrnWidth,
				       dmxScreen->beBPP));
    } else {
	/* Create default drawables (used during GC creation) */
	for (i = 0; i < dmxScreen->beNumPixmapFormats; i++) 
	    for (j = 0; j < dmxScreen->beNumDepths; j++)
		if ((dmxScreen->bePixmapFormats[i].depth == 1) ||
		    (dmxScreen->bePixmapFormats[i].depth ==
		     dmxScreen->beDepths[j])) {
		    dmxScreen->scrnDefDrawables[i] = (Drawable)
			XCreatePixmap(dmxScreen->beDisplay, dmxScreen->scrnWin,
				      1, 1, dmxScreen->bePixmapFormats[i].depth);
		    break;
		}
    }
}

static void
dmxSetWindowPixmap (WindowPtr pWin, PixmapPtr pPixmap)
{
    ScreenPtr       pScreen = pWin->drawable.pScreen;
    DMXScreenInfo  *dmxScreen = &dmxScreens[pScreen->myNum];
    PixmapPtr       pOld = (*pScreen->GetWindowPixmap) (pWin);

    if (pPixmap != pOld)
    {
	dmxWinPrivPtr pWinPriv = DMX_GET_WINDOW_PRIV (pWin);

	if (pPixmap && (*pScreen->GetWindowPixmap) (pWin->parent) != pPixmap)
	    pWinPriv->redirected = TRUE;
	else
	    pWinPriv->redirected = FALSE;
    }

    DMX_UNWRAP(SetWindowPixmap, dmxScreen, pScreen);
    if (pScreen->SetWindowPixmap)
	(*pScreen->SetWindowPixmap) (pWin, pPixmap);
    DMX_WRAP(SetWindowPixmap, dmxSetWindowPixmap, dmxScreen, pScreen);
}

static void
dmxScreenExpose (ScreenPtr pScreen)
{
    DMXScreenInfo *dmxScreen = &dmxScreens[pScreen->myNum];

    if (dmxScreen->beDisplay)
    {
	WindowPtr pChild0, pChildN;
	XEvent    X;

	for (;;)
	{
	    Bool status = FALSE;

	    XLIB_PROLOGUE (dmxScreen);

	    status = XCheckTypedEvent (dmxScreen->beDisplay, Expose, &X);

	    XLIB_EPILOGUE (dmxScreen);

	    if (!status)
		break;

	    if (dmxShouldIgnore (dmxScreen, X.xexpose.serial))
		continue;

	    pChild0 = WindowTable[0];
	    pChildN = WindowTable[pScreen->myNum];

	    for (;;)
	    {
		dmxWinPrivPtr pWinPriv = DMX_GET_WINDOW_PRIV (pChildN);

		if (pWinPriv->window == X.xexpose.window)
		    break;

		if (pChild0->firstChild)
		{
		    assert (pChildN->firstChild);
		    pChild0 = pChild0->firstChild;
		    pChildN = pChildN->firstChild;
		    continue;
		}

		while (!pChild0->nextSib && (pChild0 != WindowTable[0]))
		{
		    assert (!pChildN->nextSib &&
			    (pChildN != WindowTable[pScreen->myNum]));
		    pChild0 = pChild0->parent;
		    pChildN = pChildN->parent;
		}

		if (pChild0 == WindowTable[0])
		{
		    assert (pChildN == WindowTable[pScreen->myNum]);
		    break;
		}

		pChild0 = pChild0->nextSib;
		pChildN = pChildN->nextSib;
	    }

	    if (pChild0)
	    {
		RegionRec region;
		BoxRec    box;

		box.x1 = pChild0->drawable.x + X.xexpose.x;
		box.y1 = pChild0->drawable.y + X.xexpose.y;
		box.x2 = box.x1 + X.xexpose.width;
		box.y2 = box.y1 + X.xexpose.height;

		REGION_INIT (screenInfo.screens[0], &region, &box, 1);
		(*pScreen->WindowExposures) (pChild0, &region, NullRegion);
		REGION_UNINIT (screenInfo.screens[0], &region);
	    }
	}
    }
}

static void
dmxScreenBlockHandler (pointer   blockData,
		       OSTimePtr pTimeout,
		       pointer   pReadMask)
{
    ScreenPtr pScreen = (ScreenPtr) blockData;

    dmxScreenExpose (pScreen);
}

static void
dmxScreenWakeupHandler (pointer blockData,
			int     result,
			pointer pReadMask)
{
    ScreenPtr pScreen = (ScreenPtr) blockData;

#ifdef RANDR
    dmxRRCheckScreen (pScreen);
#endif

}

static void
dmxHandleExposures (WindowPtr pWin)
{
    WindowPtr pChild;
    ValidatePtr val;
    ScreenPtr pScreen;
    WindowExposuresProcPtr WindowExposures;

    pScreen = pWin->drawable.pScreen;

    pChild = pWin;
    WindowExposures = pChild->drawable.pScreen->WindowExposures;
    while (1)
    {
	if ( (val = pChild->valdata) )
	{
	    REGION_UNINIT(pScreen, &val->after.borderExposed);
	    (*WindowExposures)(pChild, &val->after.exposed, NullRegion);
	    REGION_UNINIT(pScreen, &val->after.exposed);
	    xfree(val);
	    pChild->valdata = (ValidatePtr)NULL;
	    if (pChild->firstChild)
	    {
		pChild = pChild->firstChild;
		continue;
	    }
	}
	while (!pChild->nextSib && (pChild != pWin))
	    pChild = pChild->parent;
	if (pChild == pWin)
	    break;
	pChild = pChild->nextSib;
    }
}

/** Initialize screen number \a idx. */
Bool dmxScreenInit(int idx, ScreenPtr pScreen, int argc, char *argv[])
{
    DMXScreenInfo        *dmxScreen = &dmxScreens[idx];
    int                   i, j;

    if (dmxGeneration != serverGeneration) {
	/* Allocate font private index */
	dmxFontPrivateIndex = AllocateFontPrivateIndex();
	if (dmxFontPrivateIndex == -1)
	    return FALSE;

	dmxGeneration = serverGeneration;
    }

    dmxScreen->ignoreHead = NULL;
    dmxScreen->ignoreTail = &dmxScreen->ignoreHead;

#ifdef RANDR
    dmxScreen->beRandr = FALSE;
    dmxScreen->beRandrPending = FALSE;
#endif

    if (dmxShadowFB) {
	dmxScreen->shadow = shadowAlloc(dmxScreen->scrnWidth,
					dmxScreen->scrnHeight,
					dmxScreen->beBPP);
    } else {
	if (!dmxInitGC(pScreen)) return FALSE;
	if (!dmxInitWindow(pScreen)) return FALSE;
	if (!dmxInitPixmap(pScreen)) return FALSE;
    }

    /*
     * Initalise the visual types.  miSetVisualTypesAndMasks() requires
     * that all of the types for each depth be collected together.  It's
     * intended for slightly different usage to what we would like here.
     * Maybe a miAddVisualTypeAndMask() function will be added to make
     * things easier here.
     */
    if (dmxScreen->beDisplay)
    {
	for (i = 0; i < dmxScreen->beNumDepths; i++) {
	    int    depth;
	    int    visuals        = 0;
	    int    bitsPerRgb     = 0;
	    int    preferredClass = -1;
	    Pixel  redMask        = 0;
	    Pixel  greenMask      = 0;
	    Pixel  blueMask       = 0;

	    depth = dmxScreen->beDepths[i];
	    for (j = 0; j < dmxScreen->beNumVisuals; j++) {
		XVisualInfo *vi;

		vi = &dmxScreen->beVisuals[j];
		if (vi->depth == depth) {
		    /* Assume the masks are all the same. */
		    visuals |= (1 << vi->class);
		    bitsPerRgb = vi->bits_per_rgb;
		    redMask = vi->red_mask;
		    greenMask = vi->green_mask;
		    blueMask = vi->blue_mask;
		    if (j == dmxScreen->beDefVisualIndex) {
			preferredClass = vi->class;
		    }
		}
	    }
	    miSetVisualTypesAndMasks(depth, visuals, bitsPerRgb,
				     preferredClass,
				     redMask, greenMask, blueMask);
	}
    }
    else
    {
	for (i = 0; i < dmxScreens[0].beNumDepths; i++) {
	    int    depth;
	    int    visuals        = 0;
	    int    bitsPerRgb     = 0;
	    int    preferredClass = -1;
	    Pixel  redMask        = 0;
	    Pixel  greenMask      = 0;
	    Pixel  blueMask       = 0;

	    depth = dmxScreens[0].beDepths[i];
	    for (j = 0; j < dmxScreens[0].beNumVisuals; j++) {
		XVisualInfo *vi;

		vi = &dmxScreens[0].beVisuals[j];
		if (vi->depth == depth) {
		    /* Assume the masks are all the same. */
		    visuals |= (1 << vi->class);
		    bitsPerRgb = vi->bits_per_rgb;
		    redMask = vi->red_mask;
		    greenMask = vi->green_mask;
		    blueMask = vi->blue_mask;
		    if (j == dmxScreens[0].beDefVisualIndex) {
			preferredClass = vi->class;
		    }
		}
	    }

#ifdef PANORAMIX
	    if (!noPanoramiXExtension)
	    {
		/* avoid additional DirectColor visuals for better
		   back-end server support */
		if (preferredClass != DirectColor)
		    visuals &= ~(1 << DirectColor);
	    }
#endif

	    miSetVisualTypesAndMasks(depth, visuals, bitsPerRgb,
				     preferredClass,
				     redMask, greenMask, blueMask);
	}
    }

    fbScreenInit(pScreen,
		 dmxShadowFB ? dmxScreen->shadow : NULL,
		 dmxScreen->scrnWidth,
		 dmxScreen->scrnHeight,
		 dmxScreen->beXDPI,
		 dmxScreen->beYDPI,
		 dmxScreen->scrnWidth,
		 dmxScreen->beBPP);

#ifdef MITSHM
    ShmRegisterFuncs (pScreen, &shmFuncs);
#endif

#ifdef PANORAMIX
    if (!noPanoramiXExtension)
    {
	for (i = 0; i < pScreen->numVisuals; i++)
	    if (pScreen->visuals[i].ColormapEntries > 256)
		pScreen->visuals[i].ColormapEntries = 256;
    }
#endif

#ifdef RENDER
    (void)dmxPictureInit(pScreen, 0, 0);
#endif

#ifdef RANDR
    if (dmxScreen->beDisplay)
    {
	int major, minor, status = 0;

	XLIB_PROLOGUE (dmxScreen);
	status = XRRQueryVersion (dmxScreen->beDisplay, &major, &minor);
	XLIB_EPILOGUE (dmxScreen);

	if (status)
	{
	    if (major > 1 || (major == 1 && minor >= 2))
	    {
		int ignore;

		XLIB_PROLOGUE (dmxScreen);
		dmxScreen->beRandr =
		    XRRQueryExtension (dmxScreen->beDisplay,
				       &dmxScreen->beRandrEventBase,
				       &ignore);
		XLIB_EPILOGUE (dmxScreen);
	    }
	}
    }

    if (!dmxRRInit (pScreen))
	return FALSE;
#endif

    if (dmxShadowFB && !shadowInit(pScreen, dmxShadowUpdateProc, NULL))
	return FALSE;

    miInitializeBackingStore(pScreen);

    if (dmxShadowFB) {
	miDCInitialize(pScreen, &dmxPointerCursorFuncs);
    } else {
        MAXSCREENSALLOC(dmxCursorGeneration);
	if (dmxCursorGeneration[idx] != serverGeneration) {
	    if (!(miPointerInitialize(pScreen,
				      &dmxPointerSpriteFuncs,
				      &dmxPointerCursorFuncs,
				      FALSE)))
		return FALSE;

	    dmxCursorGeneration[idx] = serverGeneration;
	}
    }

    DMX_WRAP(CloseScreen, dmxCloseScreen, dmxScreen, pScreen);
    DMX_WRAP(SaveScreen, dmxSaveScreen, dmxScreen, pScreen);

    if (dmxScreen->beDisplay)
	dmxBEScreenInit(idx, pScreen);

    if (!dmxShadowFB) {
	/* Wrap GC functions */
	DMX_WRAP(CreateGC, dmxCreateGC, dmxScreen, pScreen);

	/* Wrap Window functions */
	DMX_WRAP(CreateWindow, dmxCreateWindow, dmxScreen, pScreen);
	DMX_WRAP(DestroyWindow, dmxDestroyWindow, dmxScreen, pScreen);
	DMX_WRAP(PositionWindow, dmxPositionWindow, dmxScreen, pScreen);
	DMX_WRAP(ChangeWindowAttributes, dmxChangeWindowAttributes, dmxScreen,
		 pScreen);
	DMX_WRAP(RealizeWindow, dmxRealizeWindow, dmxScreen, pScreen);
	DMX_WRAP(UnrealizeWindow, dmxUnrealizeWindow, dmxScreen, pScreen);
	DMX_WRAP(RestackWindow, dmxRestackWindow, dmxScreen, pScreen);
	DMX_WRAP(CopyWindow, dmxCopyWindow, dmxScreen, pScreen);

	DMX_WRAP(ResizeWindow, dmxResizeWindow, dmxScreen, pScreen);
	DMX_WRAP(HandleExposures, dmxHandleExposures, dmxScreen, pScreen);
	DMX_WRAP(ReparentWindow, dmxReparentWindow, dmxScreen, pScreen);

	DMX_WRAP(ChangeBorderWidth, dmxChangeBorderWidth, dmxScreen, pScreen);

	DMX_WRAP(SetWindowPixmap, dmxSetWindowPixmap, dmxScreen, pScreen);

	/* Wrap Image functions */
	DMX_WRAP(GetImage, dmxGetImage, dmxScreen, pScreen);
	DMX_WRAP(GetSpans, NULL, dmxScreen, pScreen);

	/* Wrap Pixmap functions */
	DMX_WRAP(CreatePixmap, dmxCreatePixmap, dmxScreen, pScreen);
	DMX_WRAP(DestroyPixmap, dmxDestroyPixmap, dmxScreen, pScreen);
	DMX_WRAP(BitmapToRegion, dmxBitmapToRegion, dmxScreen, pScreen);

	/* Wrap Font functions */
	DMX_WRAP(RealizeFont, dmxRealizeFont, dmxScreen, pScreen);
	DMX_WRAP(UnrealizeFont, dmxUnrealizeFont, dmxScreen, pScreen);

	/* Wrap Colormap functions */
	DMX_WRAP(CreateColormap, dmxCreateColormap, dmxScreen, pScreen);
	DMX_WRAP(DestroyColormap, dmxDestroyColormap, dmxScreen, pScreen);
	DMX_WRAP(InstallColormap, dmxInstallColormap, dmxScreen, pScreen);
	DMX_WRAP(StoreColors, dmxStoreColors, dmxScreen, pScreen);

	/* Wrap Shape functions */
	DMX_WRAP(SetShape, dmxSetShape, dmxScreen, pScreen);
    }

    if (!dmxCreateDefColormap(pScreen))
	return FALSE;

    RegisterBlockAndWakeupHandlers (dmxScreenBlockHandler,
				    dmxScreenWakeupHandler,
				    pScreen);

    return TRUE;
}

/** Close the \a pScreen resources on the back-end server. */
void dmxBECloseScreen(ScreenPtr pScreen)
{
    DMXScreenInfo *dmxScreen = &dmxScreens[pScreen->myNum];
    int            i;

    /* Restore the back-end screen-saver and DPMS state. */
    dmxDPMSTerm(dmxScreen);

    /* Free the screen resources */

    XLIB_PROLOGUE (dmxScreen);
    XFreeCursor(dmxScreen->beDisplay, dmxScreen->noCursor);
    XLIB_EPILOGUE (dmxScreen);
    dmxScreen->noCursor = (Cursor)0;

    XLIB_PROLOGUE (dmxScreen);
    XUnmapWindow(dmxScreen->beDisplay, dmxScreen->scrnWin);
    XDestroyWindow(dmxScreen->beDisplay, dmxScreen->scrnWin);
    XLIB_EPILOGUE (dmxScreen);
    dmxScreen->scrnWin = (Window)0;

    if (dmxShadowFB) {
	/* Free the shadow GC and image assocated with the back-end server */
	XLIB_PROLOGUE (dmxScreen);
	XFreeGC(dmxScreen->beDisplay, dmxScreen->shadowGC);
	XLIB_EPILOGUE (dmxScreen);
	dmxScreen->shadowGC = NULL;
	XFree(dmxScreen->shadowFBImage);
	dmxScreen->shadowFBImage = NULL;
    } else {
	/* Free the default drawables */
	for (i = 0; i < dmxScreen->beNumPixmapFormats; i++) {
	    XLIB_PROLOGUE (dmxScreen);
	    XFreePixmap(dmxScreen->beDisplay, dmxScreen->scrnDefDrawables[i]);
	    XLIB_EPILOGUE (dmxScreen);
	    dmxScreen->scrnDefDrawables[i] = (Drawable)0;
	}
    }

    /* Free resources allocated during initialization (in dmxinit.c) */
    for (i = 0; i < dmxScreen->beNumDefColormaps; i++)
    {
	XLIB_PROLOGUE (dmxScreen);
	XFreeColormap(dmxScreen->beDisplay, dmxScreen->beDefColormaps[i]);
	XLIB_EPILOGUE (dmxScreen);
    }
    xfree(dmxScreen->beDefColormaps);
    dmxScreen->beDefColormaps = NULL;

#if 0
    /* Do not free visuals, depths and pixmap formats here.  Free them
     * in dmxCloseScreen() instead -- see comment below. */
    XFree(dmxScreen->beVisuals);
    dmxScreen->beVisuals = NULL;

    XFree(dmxScreen->beDepths);
    dmxScreen->beDepths = NULL;

    XFree(dmxScreen->bePixmapFormats);
    dmxScreen->bePixmapFormats = NULL;
#endif

#ifdef GLXEXT
    if (dmxScreen->glxVisuals) {
	XFree(dmxScreen->glxVisuals);
	dmxScreen->glxVisuals = NULL;
	dmxScreen->numGlxVisuals = 0;
    }
#endif

    /* Close display */
    XLIB_PROLOGUE (dmxScreen);
    XCloseDisplay(dmxScreen->beDisplay);
    XLIB_EPILOGUE (dmxScreen);
    dmxScreen->beDisplay = NULL;
}

/** Close screen number \a idx. */
Bool dmxCloseScreen(int idx, ScreenPtr pScreen)
{
    DMXScreenInfo *dmxScreen = &dmxScreens[idx];

    /* Reset the proc vectors */
    if (idx == 0) {
#ifdef RENDER
	dmxResetRender();
#endif
	dmxResetFonts();
    }

    if (dmxShadowFB) {
	/* Free the shadow framebuffer */
	xfree(dmxScreen->shadow);
    } else {

	/* Unwrap Shape functions */
	DMX_UNWRAP(SetShape, dmxScreen, pScreen);

	/* Unwrap the pScreen functions */
	DMX_UNWRAP(CreateGC, dmxScreen, pScreen);

	DMX_UNWRAP(CreateWindow, dmxScreen, pScreen);
	DMX_UNWRAP(DestroyWindow, dmxScreen, pScreen);
	DMX_UNWRAP(PositionWindow, dmxScreen, pScreen);
	DMX_UNWRAP(ChangeWindowAttributes, dmxScreen, pScreen);
	DMX_UNWRAP(RealizeWindow, dmxScreen, pScreen);
	DMX_UNWRAP(UnrealizeWindow, dmxScreen, pScreen);
	DMX_UNWRAP(RestackWindow, dmxScreen, pScreen);
	DMX_UNWRAP(CopyWindow, dmxScreen, pScreen);

	DMX_UNWRAP(ResizeWindow, dmxScreen, pScreen);
	DMX_UNWRAP(HandleExposures, dmxScreen, pScreen);
	DMX_UNWRAP(ReparentWindow, dmxScreen, pScreen);

	DMX_UNWRAP(ChangeBorderWidth, dmxScreen, pScreen);

	DMX_UNWRAP(GetImage, dmxScreen, pScreen);
	DMX_UNWRAP(GetSpans, dmxScreen, pScreen);

	DMX_UNWRAP(CreatePixmap, dmxScreen, pScreen);
	DMX_UNWRAP(DestroyPixmap, dmxScreen, pScreen);
	DMX_UNWRAP(BitmapToRegion, dmxScreen, pScreen);

	DMX_UNWRAP(RealizeFont, dmxScreen, pScreen);
	DMX_UNWRAP(UnrealizeFont, dmxScreen, pScreen);

	DMX_UNWRAP(CreateColormap, dmxScreen, pScreen);
	DMX_UNWRAP(DestroyColormap, dmxScreen, pScreen);
	DMX_UNWRAP(InstallColormap, dmxScreen, pScreen);
	DMX_UNWRAP(StoreColors, dmxScreen, pScreen);
    }

    DMX_UNWRAP(SaveScreen, dmxScreen, pScreen);

    if (dmxScreen->beDisplay) {
	dmxBECloseScreen(pScreen);

#if 1
	/* Free visuals, depths and pixmap formats here so that they
	 * won't be freed when a screen is detached, thereby allowing
	 * the screen to be reattached to be compared to the one
	 * previously removed.
	 */
	XFree(dmxScreen->beVisuals);
	dmxScreen->beVisuals = NULL;

	XFree(dmxScreen->beDepths);
	dmxScreen->beDepths = NULL;

	XFree(dmxScreen->bePixmapFormats);
	dmxScreen->bePixmapFormats = NULL;
#endif
    }

    DMX_UNWRAP(CloseScreen, dmxScreen, pScreen);
    return pScreen->CloseScreen(idx, pScreen);
}

static Bool dmxSaveScreen(ScreenPtr pScreen, int what)
{
    DMXScreenInfo *dmxScreen = &dmxScreens[pScreen->myNum];

    if (dmxScreen->beDisplay) {
	switch (what) {
	case SCREEN_SAVER_OFF:
	case SCREEN_SAVER_FORCER:
	    XLIB_PROLOGUE (dmxScreen);
	    XResetScreenSaver(dmxScreen->beDisplay);
	    XLIB_EPILOGUE (dmxScreen);
	    dmxSync(dmxScreen, FALSE);
	    break;
	case SCREEN_SAVER_ON:
	case SCREEN_SAVER_CYCLE:
	    XLIB_PROLOGUE (dmxScreen);
	    XActivateScreenSaver(dmxScreen->beDisplay);
	    XLIB_EPILOGUE (dmxScreen);
	    dmxSync(dmxScreen, FALSE);
	    break;
	}
    }

    return TRUE;
}

void
dmxDiscardIgnore (DMXScreenInfo *dmxScreen,
		  unsigned long sequence)
{
    while (dmxScreen->ignoreHead)
    {
	if ((long) (sequence - dmxScreen->ignoreHead->sequence) > 0)
	{
	    DMXIgnore *next = dmxScreen->ignoreHead->next;

	    free (dmxScreen->ignoreHead);

	    dmxScreen->ignoreHead = next;
	    if (!dmxScreen->ignoreHead)
		dmxScreen->ignoreTail = &dmxScreen->ignoreHead;
	}
	else
	    break;
    }
}

void
dmxSetIgnore (DMXScreenInfo *dmxScreen,
	      unsigned long sequence)
{
    DMXIgnore *i;

    i = malloc (sizeof (DMXIgnore));
    if (!i)
	return;

    i->sequence = sequence;
    i->next     = 0;

    *(dmxScreen->ignoreTail) = i;
    dmxScreen->ignoreTail = &i->next;
}

Bool
dmxShouldIgnore (DMXScreenInfo *dmxScreen,
		 unsigned long sequence)
{
    dmxDiscardIgnore (dmxScreen, sequence);

    if (!dmxScreen->ignoreHead)
	return FALSE;

    return dmxScreen->ignoreHead->sequence == sequence;
}