Steal Xinerama code from SiS driver. Add missing files.

Provide a Xinerama implementation when DIX version isn't enabled. This
version exposes each crtc as a separate 'screen' and reports the size of
that patch. The extension also sends ConfigureNotify events to the root
window whenever crtcs change so that applications will re-fetch xinerama
information. This actually works for metacity.

8 files changed, 1210 insertions, 3 deletions

diff --git a/randr/Makefile.am b/randr/Makefile.am
index a28ead0eb..91c4bc6dd 100644
--- a/randr/Makefile.am
+++ b/randr/Makefile.am
@@ -17,4 +17,5 @@ librandr_la_SOURCES =	\
 	rroutput.c	\
 	rrproperty.c	\
 	rrscreen.c	\
-	rrsdispatch.c
+	rrsdispatch.c	\
+	rrxinerama.c
diff --git a/randr/randr.c b/randr/randr.c
index 5f54dea14..4ea72e505 100644
--- a/randr/randr.c
+++ b/randr/randr.c
@@ -311,7 +311,7 @@ RRExtensionInit (void)
     EventSwapVector[RREventBase + RRNotify] = (EventSwapPtr)
 	SRRNotifyEvent;
 
-    return;
+    RRXineramaExtensionInit();
 }
 
 static int
diff --git a/randr/randrstr.h b/randr/randrstr.h
index e459452ff..0b8c61e1f 100644
--- a/randr/randrstr.h
+++ b/randr/randrstr.h
@@ -305,6 +305,12 @@ RRScreenSizeSet (ScreenPtr  pScreen,
 		 CARD32	    mmHeight);
 
 /*
+ * Send ConfigureNotify event to root window when 'something' happens
+ */
+void
+RRSendConfigNotify (ScreenPtr pScreen);
+    
+/*
  * screen dispatch
  */
 int 
@@ -629,4 +635,8 @@ ProcRRListOutputProperties (ClientPtr client);
 int
 ProcRRDeleteOutputProperty (ClientPtr client);
 
+/* rrxinerama.c */
+void
+RRXineramaExtensionInit(void);
+
 #endif /* _RANDRSTR_H_ */
diff --git a/randr/rrcrtc.c b/randr/rrcrtc.c
index dfa9ca6ee..ebb254068 100644
--- a/randr/rrcrtc.c
+++ b/randr/rrcrtc.c
@@ -111,6 +111,7 @@ RRCrtcNotify (RRCrtcPtr	    crtc,
 	    outputs = NULL;
 	}
 	crtc->outputs = outputs;
+	crtc->numOutputs = numOutputs;
     }
     for (i = 0; i < numOutputs; i++)
     {
@@ -158,7 +159,11 @@ RRCrtcNotify (RRCrtcPtr	    crtc,
 	crtc->changed = TRUE;
     }
     if (crtc->changed)
+    {
+	if (!pScrPriv->changed)
+	    RRSendConfigNotify (pScreen);
 	pScrPriv->changed = TRUE;
+    }
     return TRUE;
 }
 
diff --git a/randr/rrinfo.c b/randr/rrinfo.c
new file mode 100644
index 000000000..491ac218d
--- /dev/null
+++ b/randr/rrinfo.c
@@ -0,0 +1,337 @@
+/*
+ * Copyright © 2006 Keith Packard
+ *
+ * Permission to use, copy, modify, distribute, and sell this software and its
+ * documentation for any purpose is hereby granted without fee, provided that
+ * the above copyright notice appear in all copies and that both that copyright
+ * notice and this permission notice appear in supporting documentation, and
+ * that the name of the copyright holders not be used in advertising or
+ * publicity pertaining to distribution of the software without specific,
+ * written prior permission.  The copyright holders make no representations
+ * about the suitability of this software for any purpose.  It is provided "as
+ * is" without express or implied warranty.
+ *
+ * THE COPYRIGHT HOLDERS DISCLAIM ALL WARRANTIES WITH REGARD TO THIS SOFTWARE,
+ * INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO
+ * EVENT SHALL THE COPYRIGHT HOLDERS BE LIABLE FOR ANY SPECIAL, INDIRECT OR
+ * CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE,
+ * DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER
+ * TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE
+ * OF THIS SOFTWARE.
+ */
+
+#include "randrstr.h"
+
+#ifdef RANDR_10_INTERFACE
+static RRModePtr
+RROldModeAdd (RROutputPtr output, RRScreenSizePtr size, int refresh)
+{
+    ScreenPtr	pScreen = output->pScreen;
+    rrScrPriv(pScreen);
+    xRRModeInfo	modeInfo;
+    char	name[100];
+    RRModePtr	mode;
+    int		i;
+    RRModePtr   *modes;
+    
+    memset (&modeInfo, '\0', sizeof (modeInfo));
+    sprintf (name, "%dx%d", size->width, size->height);
+    
+    modeInfo.width = size->width;
+    modeInfo.height = size->height;
+    modeInfo.mmWidth = size->mmWidth;
+    modeInfo.mmHeight = size->mmHeight;
+    modeInfo.hTotal = size->width;
+    modeInfo.vTotal = size->height;
+    modeInfo.dotClock = ((CARD32) size->width * (CARD32) size->height *
+			 (CARD32) refresh);
+    modeInfo.nameLength = strlen (name);
+    mode = RRModeGet (pScreen, &modeInfo, name);
+    if (!mode)
+	return NULL;
+    for (i = 0; i < output->numModes; i++)
+	if (output->modes[i] == mode)
+	{
+	    RRModeDestroy (mode);
+	    return mode;
+	}
+    
+    if (output->numModes)
+	modes = xrealloc (output->modes, 
+			  (output->numModes + 1) * sizeof (RRModePtr));
+    else
+	modes = xalloc (sizeof (RRModePtr));
+    if (!modes)
+    {
+	RRModeDestroy (mode);
+	FreeResource (mode->mode.id, 0);
+	return NULL;
+    }
+    modes[output->numModes++] = mode;
+    output->modes = modes;
+    output->changed = TRUE;
+    pScrPriv->changed = TRUE;
+    return mode;
+}
+
+static void
+RRScanOldConfig (ScreenPtr pScreen, Rotation rotations)
+{
+    rrScrPriv(pScreen);
+    RROutputPtr	output;
+    RRCrtcPtr	crtc;
+    RRModePtr	mode, newMode = NULL;
+    int		i;
+    CARD16	minWidth = MAXSHORT, minHeight = MAXSHORT;
+    CARD16	maxWidth = 0, maxHeight = 0;
+    
+    /*
+     * First time through, create a crtc and output and hook
+     * them together
+     */
+    if (pScrPriv->numOutputs == 0 &&
+	pScrPriv->numCrtcs == 0)
+    {
+	crtc = RRCrtcCreate (pScreen, NULL);
+	if (!crtc)
+	    return;
+	output = RROutputCreate (pScreen, "default", 7, NULL);
+	if (!output)
+	    return;
+	RROutputSetCrtcs (output, &crtc, 1);
+	RROutputSetCrtc (output, crtc);
+	RROutputSetConnection (output, RR_Connected);
+#ifdef RENDER
+	RROutputSetSubpixelOrder (output, PictureGetSubpixelOrder (pScreen));
+#endif
+    }
+
+    output = RRFirstOutput (pScreen);
+    if (!output)
+	return;
+    crtc = output->crtc;
+
+    /* check rotations */
+    if (rotations != crtc->rotations)
+    {
+        crtc->rotations = rotations;
+	crtc->changed = TRUE;
+	pScrPriv->changed = TRUE;
+    }
+	
+    /* regenerate mode list */
+    for (i = 0; i < pScrPriv->nSizes; i++)
+    {
+	RRScreenSizePtr	size = &pScrPriv->pSizes[i];
+	int		r;
+
+	if (size->nRates)
+	{
+	    for (r = 0; r < size->nRates; r++)
+	    {
+		mode = RROldModeAdd (output, size, size->pRates[r].rate);
+		if (i == pScrPriv->size && 
+		    size->pRates[r].rate == pScrPriv->rate)
+		{
+		    newMode = mode;
+		}
+	    }
+	    xfree (size->pRates);
+	}
+	else
+	{
+	    mode = RROldModeAdd (output, size, 0);
+	    if (i == pScrPriv->size)
+		newMode = mode;
+	}
+    }
+    if (pScrPriv->nSizes)
+	xfree (pScrPriv->pSizes);
+    pScrPriv->pSizes = NULL;
+    pScrPriv->nSizes = 0;
+	    
+    /* find size bounds */
+    for (i = 0; i < output->numModes; i++) 
+    {
+	RRModePtr   mode = output->modes[i];
+        CARD16	    width = mode->mode.width;
+        CARD16	    height = mode->mode.height;
+	
+	if (width < minWidth) minWidth = width;
+	if (width > maxWidth) maxWidth = width;
+	if (height < minHeight) minHeight = height;
+	if (height > maxHeight) maxHeight = height;
+    }
+
+    if (minWidth != pScrPriv->minWidth) {
+	pScrPriv->minWidth = minWidth; pScrPriv->changed = TRUE;
+    }
+    if (maxWidth != pScrPriv->maxWidth) {
+	pScrPriv->maxWidth = maxWidth; pScrPriv->changed = TRUE;
+    }
+    if (minHeight != pScrPriv->minHeight) {
+	pScrPriv->minHeight = minHeight; pScrPriv->changed = TRUE;
+    }
+    if (maxHeight != pScrPriv->maxHeight) {
+	pScrPriv->maxHeight = maxHeight; pScrPriv->changed = TRUE;
+    }
+
+    /* notice current mode */
+    if (newMode)
+	RRCrtcNotify (output->crtc, newMode, 0, 0, pScrPriv->rotation,
+		      1, &output);
+}
+#endif
+
+/*
+ * Poll the driver for changed information
+ */
+Bool
+RRGetInfo (ScreenPtr pScreen)
+{
+    rrScrPriv (pScreen);
+    Rotation	    rotations;
+    int		    i;
+
+    for (i = 0; i < pScrPriv->numOutputs; i++)
+	pScrPriv->outputs[i]->changed = FALSE;
+    for (i = 0; i < pScrPriv->numCrtcs; i++)
+	pScrPriv->crtcs[i]->changed = FALSE;
+    
+    rotations = 0;
+    pScrPriv->changed = FALSE;
+    
+    if (!(*pScrPriv->rrGetInfo) (pScreen, &rotations))
+	return FALSE;
+
+#if RANDR_10_INTERFACE
+    if (pScrPriv->nSizes)
+	RRScanOldConfig (pScreen, rotations);
+#endif
+    RRTellChanged (pScreen);
+    return TRUE;
+}
+
+#if RANDR_12_INTERFACE
+/*
+ * Register the range of sizes for the screen
+ */
+void
+RRScreenSetSizeRange (ScreenPtr	pScreen,
+		      CARD16	minWidth,
+		      CARD16	minHeight,
+		      CARD16	maxWidth,
+		      CARD16	maxHeight)
+{
+    rrScrPriv (pScreen);
+
+    if (!pScrPriv)
+	return;
+    pScrPriv->minWidth  = minWidth;
+    pScrPriv->minHeight = minHeight;
+    pScrPriv->maxWidth  = maxWidth;
+    pScrPriv->maxHeight = maxHeight;
+}
+#endif
+
+#ifdef RANDR_10_INTERFACE
+static Bool
+RRScreenSizeMatches (RRScreenSizePtr  a,
+		   RRScreenSizePtr  b)
+{
+    if (a->width != b->width)
+	return FALSE;
+    if (a->height != b->height)
+	return FALSE;
+    if (a->mmWidth != b->mmWidth)
+	return FALSE;
+    if (a->mmHeight != b->mmHeight)
+	return FALSE;
+    return TRUE;
+}
+
+RRScreenSizePtr
+RRRegisterSize (ScreenPtr	    pScreen,
+		short		    width, 
+		short		    height,
+		short		    mmWidth,
+		short		    mmHeight)
+{
+    rrScrPriv (pScreen);
+    int		    i;
+    RRScreenSize    tmp;
+    RRScreenSizePtr pNew;
+
+    if (!pScrPriv)
+	return 0;
+    
+    tmp.id = 0;
+    tmp.width = width;
+    tmp.height= height;
+    tmp.mmWidth = mmWidth;
+    tmp.mmHeight = mmHeight;
+    tmp.pRates = 0;
+    tmp.nRates = 0;
+    for (i = 0; i < pScrPriv->nSizes; i++)
+	if (RRScreenSizeMatches (&tmp, &pScrPriv->pSizes[i]))
+	    return &pScrPriv->pSizes[i];
+    pNew = xrealloc (pScrPriv->pSizes,
+		     (pScrPriv->nSizes + 1) * sizeof (RRScreenSize));
+    if (!pNew)
+	return 0;
+    pNew[pScrPriv->nSizes++] = tmp;
+    pScrPriv->pSizes = pNew;
+    return &pNew[pScrPriv->nSizes-1];
+}
+
+Bool RRRegisterRate (ScreenPtr		pScreen,
+		     RRScreenSizePtr	pSize,
+		     int		rate)
+{
+    rrScrPriv(pScreen);
+    int		    i;
+    RRScreenRatePtr pNew, pRate;
+
+    if (!pScrPriv)
+	return FALSE;
+    
+    for (i = 0; i < pSize->nRates; i++)
+	if (pSize->pRates[i].rate == rate)
+	    return TRUE;
+
+    pNew = xrealloc (pSize->pRates,
+		     (pSize->nRates + 1) * sizeof (RRScreenRate));
+    if (!pNew)
+	return FALSE;
+    pRate = &pNew[pSize->nRates++];
+    pRate->rate = rate;
+    pSize->pRates = pNew;
+    return TRUE;
+}
+
+Rotation
+RRGetRotation(ScreenPtr pScreen)
+{
+    RROutputPtr	output = RRFirstOutput (pScreen);
+
+    if (!output)
+	return RR_Rotate_0;
+
+    return output->crtc->rotation;
+}
+
+void
+RRSetCurrentConfig (ScreenPtr		pScreen,
+		    Rotation		rotation,
+		    int			rate,
+		    RRScreenSizePtr	pSize)
+{
+    rrScrPriv (pScreen);
+
+    if (!pScrPriv)
+	return;
+    pScrPriv->size = pSize - pScrPriv->pSizes;
+    pScrPriv->rotation = rotation;
+    pScrPriv->rate = rate;
+}
+#endif
diff --git a/randr/rrproperty.c b/randr/rrproperty.c
new file mode 100644
index 000000000..cdafb5c9b
--- /dev/null
+++ b/randr/rrproperty.c
@@ -0,0 +1,430 @@
+/*
+ * Copyright © 2006 Keith Packard
+ *
+ * Permission to use, copy, modify, distribute, and sell this software and its
+ * documentation for any purpose is hereby granted without fee, provided that
+ * the above copyright notice appear in all copies and that both that copyright
+ * notice and this permission notice appear in supporting documentation, and
+ * that the name of the copyright holders not be used in advertising or
+ * publicity pertaining to distribution of the software without specific,
+ * written prior permission.  The copyright holders make no representations
+ * about the suitability of this software for any purpose.  It is provided "as
+ * is" without express or implied warranty.
+ *
+ * THE COPYRIGHT HOLDERS DISCLAIM ALL WARRANTIES WITH REGARD TO THIS SOFTWARE,
+ * INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO
+ * EVENT SHALL THE COPYRIGHT HOLDERS BE LIABLE FOR ANY SPECIAL, INDIRECT OR
+ * CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE,
+ * DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER
+ * TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE
+ * OF THIS SOFTWARE.
+ */
+
+#include "randrstr.h"
+#include "propertyst.h"
+#include "swaprep.h"
+
+static void
+RRDeliverEvent (ScreenPtr pScreen, xEvent *event, CARD32 mask)
+{
+}
+
+void
+RRDeleteAllOutputProperties (RROutputPtr output)
+{
+    PropertyPtr prop, next;
+    xRROutputPropertyNotifyEvent    event;
+
+    for (prop = output->properties; prop; prop = next)
+    {
+	next = prop->next;
+	event.type = RREventBase + RRNotify;
+	event.subCode = RRNotify_OutputProperty;
+	event.output = output->id;
+	event.state = PropertyDelete;
+	event.atom = prop->propertyName;
+	event.timestamp = currentTime.milliseconds;
+	RRDeliverEvent (output->pScreen, (xEvent *) &event, RROutputPropertyNotifyMask);
+        xfree(prop->data);
+        xfree(prop);
+    }
+}
+
+void
+RRDeleteOutputProperty (RROutputPtr output, Atom property)
+{
+    PropertyPtr	prop, *prev;
+    xRROutputPropertyNotifyEvent    event;
+
+    for (prev = &output->properties; (prop = *prev); prev = &(prop->next))
+	if (prop->propertyName == property)
+	    break;
+    if (prop)
+    {
+	*prev = prop->next;
+	event.type = RREventBase + RRNotify;
+	event.subCode = RRNotify_OutputProperty;
+	event.output = output->id;
+	event.state = PropertyDelete;
+	event.atom = prop->propertyName;
+	event.timestamp = currentTime.milliseconds;
+	RRDeliverEvent (output->pScreen, (xEvent *) &event, RROutputPropertyNotifyMask);
+        xfree(prop->data);
+        xfree(prop);
+    }
+}
+
+int
+RRChangeOutputProperty (RROutputPtr output, Atom property, Atom type,
+			int format, int mode, unsigned long len,
+			pointer value, Bool sendevent)
+{
+    PropertyPtr			    prop;
+    xRROutputPropertyNotifyEvent    event;
+    int				    sizeInBytes;
+    int				    totalSize;
+    pointer			    data;
+
+    sizeInBytes = format >> 3;
+    totalSize = len * sizeInBytes;
+
+    /* first see if property already exists */
+
+    for (prop = output->properties; prop; prop = prop->next)
+	if (prop->propertyName == property)
+	    break;
+    
+    if (!prop)   /* just add to list */
+    {
+        prop = (PropertyPtr)xalloc(sizeof(PropertyRec));
+	if (!prop)
+	    return(BadAlloc);
+        data = (pointer)xalloc(totalSize);
+	if (!data && len)
+	{
+	    xfree(prop);
+	    return(BadAlloc);
+	}
+        prop->propertyName = property;
+        prop->type = type;
+        prop->format = format;
+        prop->data = data;
+	if (len)
+	    memmove((char *)data, (char *)value, totalSize);
+	prop->size = len;
+        prop->next = output->properties;
+        output->properties = prop;
+    }
+    else
+    {
+	/* To append or prepend to a property the request format and type
+		must match those of the already defined property.  The
+		existing format and type are irrelevant when using the mode
+		"PropModeReplace" since they will be written over. */
+
+        if ((format != prop->format) && (mode != PropModeReplace))
+	    return(BadMatch);
+        if ((prop->type != type) && (mode != PropModeReplace))
+            return(BadMatch);
+        if (mode == PropModeReplace)
+        {
+	    if (totalSize != prop->size * (prop->format >> 3))
+	    {
+	    	data = (pointer)xrealloc(prop->data, totalSize);
+	    	if (!data && len)
+		    return(BadAlloc);
+            	prop->data = data;
+	    }
+	    if (len)
+		memmove((char *)prop->data, (char *)value, totalSize);
+	    prop->size = len;
+    	    prop->type = type;
+	    prop->format = format;
+	}
+	else if (len == 0)
+	{
+	    /* do nothing */
+	}
+        else if (mode == PropModeAppend)
+        {
+	    data = (pointer)xrealloc(prop->data,
+				     sizeInBytes * (len + prop->size));
+	    if (!data)
+		return(BadAlloc);
+            prop->data = data;
+	    memmove(&((char *)data)[prop->size * sizeInBytes], 
+		    (char *)value,
+		  totalSize);
+            prop->size += len;
+	}
+        else if (mode == PropModePrepend)
+        {
+            data = (pointer)xalloc(sizeInBytes * (len + prop->size));
+	    if (!data)
+		return(BadAlloc);
+	    memmove(&((char *)data)[totalSize], (char *)prop->data, 
+		  (int)(prop->size * sizeInBytes));
+            memmove((char *)data, (char *)value, totalSize);
+	    xfree(prop->data);
+            prop->data = data;
+            prop->size += len;
+	}
+    }
+    if (sendevent)
+    {
+	event.type = RREventBase + RRNotify;
+	event.subCode = RRNotify_OutputProperty;
+	event.output = output->id;
+	event.state = PropertyNewValue;
+	event.atom = prop->propertyName;
+	event.timestamp = currentTime.milliseconds;
+	RRDeliverEvent (output->pScreen, (xEvent *) &event, RROutputPropertyNotifyMask);
+    }
+    return(Success);
+}
+
+int
+ProcRRListOutputProperties (ClientPtr client)
+{
+    REQUEST(xRRListOutputPropertiesReq);
+    Atom			    *pAtoms = NULL, *temppAtoms;
+    xRRListOutputPropertiesReply    rep;
+    int				    numProps = 0;
+    RROutputPtr			    output;
+    PropertyPtr			    prop;
+    
+    REQUEST_SIZE_MATCH(xRRListOutputPropertiesReq);
+
+    output = LookupOutput (client, stuff->output, SecurityReadAccess);
+    
+    if (!output)
+        return RRErrorBase + BadRROutput;
+
+    for (prop = output->properties; prop; prop = prop->next)
+	numProps++;
+    if (numProps)
+        if(!(pAtoms = (Atom *)ALLOCATE_LOCAL(numProps * sizeof(Atom))))
+            return(BadAlloc);
+
+    rep.type = X_Reply;
+    rep.nProperties = numProps;
+    rep.length = (numProps * sizeof(Atom)) >> 2;
+    rep.sequenceNumber = client->sequence;
+    temppAtoms = pAtoms;
+    for (prop = output->properties; prop; prop = prop->next)
+	*temppAtoms++ = prop->propertyName;
+
+    WriteReplyToClient(client, sizeof(xRRListOutputPropertiesReply), &rep);
+    if (numProps)
+    {
+        client->pSwapReplyFunc = (ReplySwapPtr)Swap32Write;
+        WriteSwappedDataToClient(client, numProps * sizeof(Atom), pAtoms);
+        DEALLOCATE_LOCAL(pAtoms);
+    }
+    return(client->noClientException);
+}
+
+int
+ProcRRChangeOutputProperty (ClientPtr client)
+{
+    REQUEST(xRRChangeOutputPropertyReq);
+    RROutputPtr	    output;
+    char	    format, mode;
+    unsigned long   len;
+    int		    sizeInBytes;
+    int		    totalSize;
+    int		    err;
+
+    REQUEST_AT_LEAST_SIZE(xRRChangeOutputPropertyReq);
+    UpdateCurrentTime();
+    format = stuff->format;
+    mode = stuff->mode;
+    if ((mode != PropModeReplace) && (mode != PropModeAppend) &&
+	(mode != PropModePrepend))
+    {
+	client->errorValue = mode;
+	return BadValue;
+    }
+    if ((format != 8) && (format != 16) && (format != 32))
+    {
+	client->errorValue = format;
+        return BadValue;
+    }
+    len = stuff->nUnits;
+    if (len > ((0xffffffff - sizeof(xChangePropertyReq)) >> 2))
+	return BadLength;
+    sizeInBytes = format>>3;
+    totalSize = len * sizeInBytes;
+    REQUEST_FIXED_SIZE(xRRChangeOutputPropertyReq, totalSize);
+
+    output = LookupOutput (client, stuff->output, SecurityWriteAccess);
+    if (!output)
+	return RRErrorBase + BadRROutput;
+    
+    if (!ValidAtom(stuff->property))
+    {
+	client->errorValue = stuff->property;
+	return(BadAtom);
+    }
+    if (!ValidAtom(stuff->type))
+    {
+	client->errorValue = stuff->type;
+	return(BadAtom);
+    }
+
+    err = RRChangeOutputProperty(output, stuff->property,
+				 stuff->type, (int)format,
+				 (int)mode, len, (pointer)&stuff[1], TRUE);
+    if (err != Success)
+	return err;
+    else
+	return client->noClientException;
+}
+
+int
+ProcRRDeleteOutputProperty (ClientPtr client)
+{
+    REQUEST(xRRDeleteOutputPropertyReq);
+    RROutputPtr	output;
+              
+    REQUEST_SIZE_MATCH(xRRDeleteOutputPropertyReq);
+    UpdateCurrentTime();
+    output = LookupOutput (client, stuff->output, SecurityWriteAccess);
+    if (!output)
+        return RRErrorBase + BadRROutput;
+    
+    if (!ValidAtom(stuff->property))
+    {
+	client->errorValue = stuff->property;
+	return (BadAtom);
+    }
+
+
+    RRDeleteOutputProperty(output, stuff->property);
+    return client->noClientException;
+}
+
+int
+ProcRRGetOutputProperty (ClientPtr client)
+{
+    REQUEST(xRRGetOutputPropertyReq);
+    PropertyPtr			prop, *prev;
+    unsigned long		n, len, ind;
+    RROutputPtr			output;
+    xRRGetOutputPropertyReply	reply;
+
+    REQUEST_SIZE_MATCH(xRRGetOutputPropertyReq);
+    if (stuff->delete)
+	UpdateCurrentTime();
+    output = LookupOutput (client, stuff->output, 
+			   stuff->delete ? SecurityWriteAccess :
+			   SecurityReadAccess);
+    if (!output)
+	return RRErrorBase + BadRROutput;
+
+    if (!ValidAtom(stuff->property))
+    {
+	client->errorValue = stuff->property;
+	return(BadAtom);
+    }
+    if ((stuff->delete != xTrue) && (stuff->delete != xFalse))
+    {
+	client->errorValue = stuff->delete;
+	return(BadValue);
+    }
+    if ((stuff->type != AnyPropertyType) && !ValidAtom(stuff->type))
+    {
+	client->errorValue = stuff->type;
+	return(BadAtom);
+    }
+
+    for (prev = &output->properties; (prop = *prev); prev = &prop->next)
+	if (prop->propertyName == stuff->property) 
+	    break;
+
+    reply.type = X_Reply;
+    reply.sequenceNumber = client->sequence;
+    if (!prop) 
+    {
+	reply.nItems = 0;
+	reply.length = 0;
+	reply.bytesAfter = 0;
+	reply.propertyType = None;
+	reply.format = 0;
+	WriteReplyToClient(client, sizeof(xRRGetOutputPropertyReply), &reply);
+	return(client->noClientException);
+    }
+
+    /* If the request type and actual type don't match. Return the
+    property information, but not the data. */
+
+    if (((stuff->type != prop->type) &&
+	 (stuff->type != AnyPropertyType))
+       )
+    {
+	reply.bytesAfter = prop->size;
+	reply.format = prop->format;
+	reply.length = 0;
+	reply.nItems = 0;
+	reply.propertyType = prop->type;
+	WriteReplyToClient(client, sizeof(xRRGetOutputPropertyReply), &reply);
+	return(client->noClientException);
+    }
+
+/*
+ *  Return type, format, value to client
+ */
+    n = (prop->format/8) * prop->size; /* size (bytes) of prop */
+    ind = stuff->longOffset << 2;        
+
+   /* If longOffset is invalid such that it causes "len" to
+	    be negative, it's a value error. */
+
+    if (n < ind)
+    {
+	client->errorValue = stuff->longOffset;
+	return BadValue;
+    }
+
+    len = min(n - ind, 4 * stuff->longLength);
+
+    reply.bytesAfter = n - (ind + len);
+    reply.format = prop->format;
+    reply.length = (len + 3) >> 2;
+    reply.nItems = len / (prop->format / 8 );
+    reply.propertyType = prop->type;
+
+    if (stuff->delete && (reply.bytesAfter == 0))
+    {
+	xRROutputPropertyNotifyEvent    event;
+
+	event.type = RREventBase + RRNotify;
+	event.subCode = RRNotify_OutputProperty;
+	event.output = output->id;
+	event.state = PropertyDelete;
+	event.atom = prop->propertyName;
+	event.timestamp = currentTime.milliseconds;
+	RRDeliverEvent (output->pScreen, (xEvent *) &event, RROutputPropertyNotifyMask);
+    }
+
+    WriteReplyToClient(client, sizeof(xGenericReply), &reply);
+    if (len)
+    {
+	switch (reply.format) {
+	case 32: client->pSwapReplyFunc = (ReplySwapPtr)CopySwap32Write; break;
+	case 16: client->pSwapReplyFunc = (ReplySwapPtr)CopySwap16Write; break;
+	default: client->pSwapReplyFunc = (ReplySwapPtr)WriteToClient; break;
+	}
+	WriteSwappedDataToClient(client, len,
+				 (char *)prop->data + ind);
+    }
+
+    if (stuff->delete && (reply.bytesAfter == 0))
+    { /* delete the Property */
+	*prev = prop->next;
+	xfree(prop->data);
+	xfree(prop);
+    }
+    return(client->noClientException);
+}
+
diff --git a/randr/rrscreen.c b/randr/rrscreen.c
index e59947b36..e382540b7 100644
--- a/randr/rrscreen.c
+++ b/randr/rrscreen.c
@@ -69,7 +69,7 @@ RREditConnectionInfo (ScreenPtr pScreen)
     root->mmHeight = pScreen->mmHeight;
 }
 
-static void
+void
 RRSendConfigNotify (ScreenPtr pScreen)
 {
     WindowPtr	pWin = WindowTable[pScreen->myNum];
diff --git a/randr/rrxinerama.c b/randr/rrxinerama.c
new file mode 100644
index 000000000..31f60cca1
--- /dev/null
+++ b/randr/rrxinerama.c
@@ -0,0 +1,424 @@
+/*
+ * Copyright © 2006 Keith Packard
+ *
+ * Permission to use, copy, modify, distribute, and sell this software and its
+ * documentation for any purpose is hereby granted without fee, provided that
+ * the above copyright notice appear in all copies and that both that copyright
+ * notice and this permission notice appear in supporting documentation, and
+ * that the name of the copyright holders not be used in advertising or
+ * publicity pertaining to distribution of the software without specific,
+ * written prior permission.  The copyright holders make no representations
+ * about the suitability of this software for any purpose.  It is provided "as
+ * is" without express or implied warranty.
+ *
+ * THE COPYRIGHT HOLDERS DISCLAIM ALL WARRANTIES WITH REGARD TO THIS SOFTWARE,
+ * INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO
+ * EVENT SHALL THE COPYRIGHT HOLDERS BE LIABLE FOR ANY SPECIAL, INDIRECT OR
+ * CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE,
+ * DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER
+ * TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE
+ * OF THIS SOFTWARE.
+ */
+/*
+ * This Xinerama implementation comes from the SiS driver which has
+ * the following notice:
+ */
+/* 
+ * SiS driver main code
+ *
+ * Copyright (C) 2001-2005 by Thomas Winischhofer, Vienna, Austria.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1) Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2) Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ * 3) The name of the author may not be used to endorse or promote products
+ *    derived from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
+ * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
+ * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
+ * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
+ * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
+ * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
+ * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ * Author: Thomas Winischhofer <thomas@winischhofer.net>
+ *	- driver entirely rewritten since 2001, only basic structure taken from
+ *	  old code (except sis_dri.c, sis_shadow.c, sis_accel.c and parts of
+ *	  sis_dga.c; these were mostly taken over; sis_dri.c was changed for
+ *	  new versions of the DRI layer)
+ *
+ * This notice covers the entire driver code unless indicated otherwise.
+ *
+ * Formerly based on code which was
+ * 	     Copyright (C) 1998, 1999 by Alan Hourihane, Wigan, England.
+ * 	     Written by:
+ *           Alan Hourihane <alanh@fairlite.demon.co.uk>,
+ *           Mike Chapman <mike@paranoia.com>,
+ *           Juanjo Santamarta <santamarta@ctv.es>,
+ *           Mitani Hiroshi <hmitani@drl.mei.co.jp>,
+ *           David Thomas <davtom@dream.org.uk>.
+ */
+
+#include "randrstr.h"
+#include "swaprep.h"
+#include <X11/extensions/panoramiXproto.h>
+
+#define RR_XINERAMA_MAJOR_VERSION   1
+#define RR_XINERAMA_MINOR_VERSION   1
+
+/* Xinerama is not multi-screen capable; just report about screen 0 */
+#define RR_XINERAMA_SCREEN  0
+
+static int ProcRRXineramaQueryVersion(ClientPtr client);
+static int ProcRRXineramaGetState(ClientPtr client);
+static int ProcRRXineramaGetScreenCount(ClientPtr client);
+static int ProcRRXineramaGetScreenSize(ClientPtr client);
+static int ProcRRXineramaIsActive(ClientPtr client);
+static int ProcRRXineramaQueryScreens(ClientPtr client);
+static int SProcRRXineramaDispatch(ClientPtr client);
+
+/* Proc */
+
+int
+ProcRRXineramaQueryVersion(ClientPtr client)
+{
+    xPanoramiXQueryVersionReply	  rep;
+    register int		  n;
+
+    REQUEST_SIZE_MATCH(xPanoramiXQueryVersionReq);
+    rep.type = X_Reply;
+    rep.length = 0;
+    rep.sequenceNumber = client->sequence;
+    rep.majorVersion = RR_XINERAMA_MAJOR_VERSION;
+    rep.minorVersion = RR_XINERAMA_MINOR_VERSION;
+    if(client->swapped) {
+        swaps(&rep.sequenceNumber, n);
+        swapl(&rep.length, n);
+        swaps(&rep.majorVersion, n);
+        swaps(&rep.minorVersion, n);
+    }
+    WriteToClient(client, sizeof(xPanoramiXQueryVersionReply), (char *)&rep);
+    return (client->noClientException);
+}
+
+int
+ProcRRXineramaGetState(ClientPtr client)
+{
+    REQUEST(xPanoramiXGetStateReq);
+    WindowPtr			pWin;
+    xPanoramiXGetStateReply	rep;
+    register int		n;
+    ScreenPtr			pScreen;
+    rrScrPrivPtr		pScrPriv;
+    Bool			active = FALSE;
+
+    REQUEST_SIZE_MATCH(xPanoramiXGetStateReq);
+    pWin = LookupWindow(stuff->window, client);
+    if(!pWin) return BadWindow;
+
+    pScreen = pWin->drawable.pScreen;
+    pScrPriv = rrGetScrPriv(pScreen);
+    if (pScrPriv)
+    {
+	/* XXX do we need more than this? */
+	active = TRUE;
+    }
+
+    rep.type = X_Reply;
+    rep.length = 0;
+    rep.sequenceNumber = client->sequence;
+    rep.state = active;
+    if(client->swapped) {
+       swaps (&rep.sequenceNumber, n);
+       swapl (&rep.length, n);
+       swaps (&rep.state, n);
+    }
+    WriteToClient(client, sizeof(xPanoramiXGetStateReply), (char *)&rep);
+    return client->noClientException;
+}
+
+static Bool
+RRXineramaScreenActive (ScreenPtr pScreen)
+{
+    return rrGetScrPriv(pScreen) != NULL;
+}
+
+static Bool
+RRXineramaCrtcActive (RRCrtcPtr crtc)
+{
+    return crtc->mode != NULL && crtc->numOutputs > 0;
+}
+
+static int
+RRXineramaScreenCount (ScreenPtr pScreen)
+{
+    int	i, n;
+    
+    n = 0;
+    if (RRXineramaScreenActive (pScreen))
+    {
+	rrScrPriv(pScreen);
+	for (i = 0; i < pScrPriv->numCrtcs; i++)
+	    if (RRXineramaCrtcActive (pScrPriv->crtcs[i]))
+		n++;
+    }
+    return n;
+}
+
+int
+ProcRRXineramaGetScreenCount(ClientPtr client)
+{
+    REQUEST(xPanoramiXGetScreenCountReq);
+    WindowPtr				pWin;
+    xPanoramiXGetScreenCountReply	rep;
+    register int			n;
+
+    REQUEST_SIZE_MATCH(xPanoramiXGetScreenCountReq);
+    pWin = LookupWindow(stuff->window, client);
+    if(!pWin) return BadWindow;
+    
+    rep.type = X_Reply;
+    rep.length = 0;
+    rep.sequenceNumber = client->sequence;
+    rep.ScreenCount = RRXineramaScreenCount (pWin->drawable.pScreen);
+    if(client->swapped) {
+       swaps(&rep.sequenceNumber, n);
+       swapl(&rep.length, n);
+       swaps(&rep.ScreenCount, n);
+    }
+    WriteToClient(client, sizeof(xPanoramiXGetScreenCountReply), (char *)&rep);
+    return client->noClientException;
+}
+
+int
+ProcRRXineramaGetScreenSize(ClientPtr client)
+{
+    REQUEST(xPanoramiXGetScreenSizeReq);
+    WindowPtr				pWin, pRoot;
+    ScreenPtr				pScreen;
+    xPanoramiXGetScreenSizeReply	rep;
+    register int			n;
+
+    REQUEST_SIZE_MATCH(xPanoramiXGetScreenSizeReq);
+    pWin = LookupWindow (stuff->window, client);
+    if(!pWin)  return BadWindow;
+
+    pScreen = pWin->drawable.pScreen;
+    pRoot = WindowTable[pScreen->myNum];
+    
+    rep.type = X_Reply;
+    rep.length = 0;
+    rep.sequenceNumber = client->sequence;
+    rep.width  = pRoot->drawable.width;
+    rep.height = pRoot->drawable.height;
+    if(client->swapped) {
+       swaps(&rep.sequenceNumber, n);
+       swapl(&rep.length, n);
+       swaps(&rep.width, n);
+       swaps(&rep.height, n);
+    }
+    WriteToClient(client, sizeof(xPanoramiXGetScreenSizeReply), (char *)&rep);
+    return client->noClientException;
+}
+
+int
+ProcRRXineramaIsActive(ClientPtr client)
+{
+    xXineramaIsActiveReply	rep;
+
+    REQUEST_SIZE_MATCH(xXineramaIsActiveReq);
+	
+    rep.type = X_Reply;
+    rep.length = 0;
+    rep.sequenceNumber = client->sequence;
+    rep.state = RRXineramaScreenActive (screenInfo.screens[RR_XINERAMA_SCREEN]);
+    if(client->swapped) {
+	register int n;
+	swaps(&rep.sequenceNumber, n);
+	swapl(&rep.length, n);
+	swapl(&rep.state, n);
+    }
+    WriteToClient(client, sizeof(xXineramaIsActiveReply), (char *) &rep);
+    return client->noClientException;
+}
+
+int
+ProcRRXineramaQueryScreens(ClientPtr client)
+{
+    xXineramaQueryScreensReply	rep;
+    ScreenPtr	pScreen = screenInfo.screens[RR_XINERAMA_SCREEN];
+
+    REQUEST_SIZE_MATCH(xXineramaQueryScreensReq);
+
+    rep.type = X_Reply;
+    rep.sequenceNumber = client->sequence;
+    rep.number = RRXineramaScreenCount (pScreen);
+    rep.length = rep.number * sz_XineramaScreenInfo >> 2;
+    if(client->swapped) {
+	register int n;
+	swaps(&rep.sequenceNumber, n);
+	swapl(&rep.length, n);
+	swapl(&rep.number, n);
+    }
+    WriteToClient(client, sizeof(xXineramaQueryScreensReply), (char *)&rep);
+
+    if(rep.number) {
+	rrScrPriv(pScreen);
+	xXineramaScreenInfo scratch;
+	int i;
+
+	for(i = 0; i < pScrPriv->numCrtcs; i++) {
+	    RRCrtcPtr	crtc = pScrPriv->crtcs[i];
+	    if (RRXineramaCrtcActive (crtc))
+	    {
+		scratch.x_org  = crtc->x;
+		scratch.y_org  = crtc->y;
+		scratch.width  = crtc->mode->mode.width;
+		scratch.height = crtc->mode->mode.height;
+		if(client->swapped) {
+		    register int n;
+		    swaps(&scratch.x_org, n);
+		    swaps(&scratch.y_org, n);
+		    swaps(&scratch.width, n);
+		    swaps(&scratch.height, n);
+		}
+		WriteToClient(client, sz_XineramaScreenInfo, (char *)&scratch);
+	    }
+	}
+    }
+
+    return client->noClientException;
+}
+
+static int
+ProcRRXineramaDispatch(ClientPtr client)
+{
+    REQUEST(xReq);
+    switch (stuff->data) {
+	case X_PanoramiXQueryVersion:
+	     return ProcRRXineramaQueryVersion(client);
+	case X_PanoramiXGetState:
+	     return ProcRRXineramaGetState(client);
+	case X_PanoramiXGetScreenCount:
+	     return ProcRRXineramaGetScreenCount(client);
+	case X_PanoramiXGetScreenSize:
+	     return ProcRRXineramaGetScreenSize(client);
+	case X_XineramaIsActive:
+	     return ProcRRXineramaIsActive(client);
+	case X_XineramaQueryScreens:
+	     return ProcRRXineramaQueryScreens(client);
+    }
+    return BadRequest;
+}
+
+/* SProc */
+
+static int
+SProcRRXineramaQueryVersion (ClientPtr client)
+{
+    REQUEST(xPanoramiXQueryVersionReq);
+    register int n;
+    swaps(&stuff->length,n);
+    REQUEST_SIZE_MATCH (xPanoramiXQueryVersionReq);
+    return ProcRRXineramaQueryVersion(client);
+}
+
+static int
+SProcRRXineramaGetState(ClientPtr client)
+{
+    REQUEST(xPanoramiXGetStateReq);
+    register int n;
+    swaps (&stuff->length, n);
+    REQUEST_SIZE_MATCH(xPanoramiXGetStateReq);
+    return ProcRRXineramaGetState(client);
+}
+
+static int
+SProcRRXineramaGetScreenCount(ClientPtr client)
+{
+    REQUEST(xPanoramiXGetScreenCountReq);
+    register int n;
+    swaps (&stuff->length, n);
+    REQUEST_SIZE_MATCH(xPanoramiXGetScreenCountReq);
+    return ProcRRXineramaGetScreenCount(client);
+}
+
+static int
+SProcRRXineramaGetScreenSize(ClientPtr client)
+{
+    REQUEST(xPanoramiXGetScreenSizeReq);
+    register int n;
+    swaps (&stuff->length, n);
+    REQUEST_SIZE_MATCH(xPanoramiXGetScreenSizeReq);
+    return ProcRRXineramaGetScreenSize(client);
+}
+
+static int
+SProcRRXineramaIsActive(ClientPtr client)
+{
+    REQUEST(xXineramaIsActiveReq);
+    register int n;
+    swaps (&stuff->length, n);
+    REQUEST_SIZE_MATCH(xXineramaIsActiveReq);
+    return ProcRRXineramaIsActive(client);
+}
+
+static int
+SProcRRXineramaQueryScreens(ClientPtr client)
+{
+    REQUEST(xXineramaQueryScreensReq);
+    register int n;
+    swaps (&stuff->length, n);
+    REQUEST_SIZE_MATCH(xXineramaQueryScreensReq);
+    return ProcRRXineramaQueryScreens(client);
+}
+
+int
+SProcRRXineramaDispatch(ClientPtr client)
+{
+    REQUEST(xReq);
+    switch (stuff->data) {
+	case X_PanoramiXQueryVersion:
+	     return SProcRRXineramaQueryVersion(client);
+	case X_PanoramiXGetState:
+	     return SProcRRXineramaGetState(client);
+	case X_PanoramiXGetScreenCount:
+	     return SProcRRXineramaGetScreenCount(client);
+	case X_PanoramiXGetScreenSize:
+	     return SProcRRXineramaGetScreenSize(client);
+	case X_XineramaIsActive:
+	     return SProcRRXineramaIsActive(client);
+	case X_XineramaQueryScreens:
+	     return SProcRRXineramaQueryScreens(client);
+    }
+    return BadRequest;
+}
+
+static void
+RRXineramaResetProc(ExtensionEntry* extEntry)
+{
+}
+
+void
+RRXineramaExtensionInit(void)
+{
+#ifdef PANORAMIX
+    if(!noPanoramiXExtension)
+	return;
+#endif
+
+    (void) AddExtension(PANORAMIX_PROTOCOL_NAME, 0,0,
+			ProcRRXineramaDispatch,
+			SProcRRXineramaDispatch,
+			RRXineramaResetProc,
+			StandardMinorOpcode);
+}