Allow RandR objects to be created before the associated ScreenRec.

xf86 drivers need to create RandR object in the PreInit stage,
before the ScreenRec is allocated. Changing the RandR DIX code
to permit this required the addition of functions that later associate the
objects with the related screen.

An additional change is that modes are now global, and no longer associated
with a specific screen. This change actually makes mode management cleaner
as there is no more per-screen list of modes to deal with.

This changes the RandR 1.2 ABI/API for drivers.

8 files changed, 253 insertions, 168 deletions

diff --git a/randr/mirandr.c b/randr/mirandr.c
index 11c299133..3f56fe42e 100644
--- a/randr/mirandr.c
+++ b/randr/mirandr.c
@@ -113,17 +113,24 @@ miRandRInit (ScreenPtr pScreen)
     modeInfo.height = pScreen->height;
     modeInfo.nameLength = strlen (name);
     
-    mode = RRModeGet (pScreen, &modeInfo, name);
+    mode = RRModeGet (&modeInfo, name);
     if (!mode)
 	return FALSE;
     
-    crtc = RRCrtcCreate (pScreen, NULL);
+    crtc = RRCrtcCreate (NULL);
     if (!crtc)
 	return FALSE;
+    if (!RRCrtcAttachScreen (crtc, pScreen))
+    {
+	RRCrtcDestroy (crtc);
+	return FALSE;
+    }
     
-    output = RROutputCreate (pScreen, "screen", 6, NULL);
+    output = RROutputCreate ("screen", 6, NULL);
     if (!output)
 	return FALSE;
+    if (!RROutputAttachScreen (output, pScreen))
+	return FALSE;
     if (!RROutputSetClones (output, NULL, 0))
 	return FALSE;
     if (!RROutputSetModes (output, &mode, 1, 0))
diff --git a/randr/randr.c b/randr/randr.c
index 7b39e8045..4426c4773 100644
--- a/randr/randr.c
+++ b/randr/randr.c
@@ -103,8 +103,6 @@ RRCloseScreen (int i, ScreenPtr pScreen)
 	RRCrtcDestroy (pScrPriv->crtcs[j]);
     for (j = pScrPriv->numOutputs - 1; j >= 0; j--)
 	RROutputDestroy (pScrPriv->outputs[j]);
-    for (j = pScrPriv->numModes - 1; j >= 0; j--)
-	RRModeDestroy (pScrPriv->modes[j]);
     
     xfree (pScrPriv);
     RRNScreens -= 1;	/* ok, one fewer screen with RandR running */
@@ -257,8 +255,6 @@ Bool RRScreenInit(ScreenPtr pScreen)
     
     wrap (pScrPriv, pScreen, CloseScreen, RRCloseScreen);
 
-    pScrPriv->numModes = 0;
-    pScrPriv->modes = NULL;
     pScrPriv->numOutputs = 0;
     pScrPriv->outputs = NULL;
     pScrPriv->numCrtcs = 0;
diff --git a/randr/randrstr.h b/randr/randrstr.h
index 60877a3c1..345418b8f 100644
--- a/randr/randrstr.h
+++ b/randr/randrstr.h
@@ -79,7 +79,6 @@ struct _rrMode {
     xRRModeInfo	    mode;
     char	    *name;
     void	    *devPrivate;
-    ScreenPtr	    screen;
     Bool	    userDefined;
 };
 
@@ -210,10 +209,6 @@ typedef struct _rrScrPriv {
     CARD16		    width, height;	/* last known screen size */
     Bool		    layoutChanged;	/* screen layout changed */
 
-    /* modes, outputs and crtcs */
-    int			    numModes;
-    RRModePtr		    *modes;
-
     int			    numOutputs;
     RROutputPtr		    *outputs;
 
@@ -457,10 +452,17 @@ RRCrtcChanged (RRCrtcPtr crtc, Bool layoutChanged);
  * Create a CRTC
  */
 RRCrtcPtr
-RRCrtcCreate (ScreenPtr	pScreen,
-	      void	*devPrivate);
+RRCrtcCreate (void	*devPrivate);
 
 /*
+ * Attach a CRTC to a screen. Once done, this cannot be
+ * undone without destroying the CRTC; it is separate from Create
+ * only to allow an xf86-based driver to create objects in preinit
+ */
+Bool
+RRCrtcAttachScreen (RRCrtcPtr crtc, ScreenPtr pScreen);
+    
+/*
  * Notify the extension that the Crtc has been reconfigured,
  * the driver calls this whenever it has updated the mode
  */
@@ -556,8 +558,7 @@ RRClientKnowsRates (ClientPtr	pClient);
  */
 
 RRModePtr
-RRModeGet (ScreenPtr	pScreen,
-	   xRRModeInfo	*modeInfo,
+RRModeGet (xRRModeInfo	*modeInfo,
 	   const char	*name);
 
 void
@@ -571,6 +572,12 @@ void
 RRModeDestroy (RRModePtr mode);
 
 /*
+ * Return a list of modes that are valid for some output in pScreen
+ */
+RRModePtr *
+RRModesForScreen (ScreenPtr pScreen, int *num_ret);
+    
+/*
  * Initialize mode type
  */
 Bool
@@ -601,12 +608,19 @@ RROutputChanged (RROutputPtr output);
  */
 
 RROutputPtr
-RROutputCreate (ScreenPtr   pScreen,
-		const char  *name,
+RROutputCreate (const char  *name,
 		int	    nameLength,
 		void	    *devPrivate);
 
 /*
+ * Attach an output to a screen, again split from creation so
+ * xf86 DDXen can create randr resources before the ScreenRec
+ * exists
+ */
+Bool
+RROutputAttachScreen (RROutputPtr output, ScreenPtr pScreen);
+
+/*
  * Notify extension that output parameters have been changed
  */
 Bool
diff --git a/randr/rrcrtc.c b/randr/rrcrtc.c
index 76d0b6bf5..9f7177a34 100644
--- a/randr/rrcrtc.c
+++ b/randr/rrcrtc.c
@@ -32,43 +32,34 @@ void
 RRCrtcChanged (RRCrtcPtr crtc, Bool layoutChanged)
 {
     ScreenPtr	pScreen = crtc->pScreen;
-    rrScrPriv(pScreen);
 
     crtc->changed = TRUE;
-    pScrPriv->changed = TRUE;
-    /*
-     * Send ConfigureNotify on any layout change
-     */
-    if (layoutChanged)
-	pScrPriv->layoutChanged = TRUE;
+    if (pScreen)
+    {
+	rrScrPriv(pScreen);
+    
+	pScrPriv->changed = TRUE;
+	/*
+	 * Send ConfigureNotify on any layout change
+	 */
+	if (layoutChanged)
+	    pScrPriv->layoutChanged = TRUE;
+    }
 }
 
 /*
  * Create a CRTC
  */
 RRCrtcPtr
-RRCrtcCreate (ScreenPtr	pScreen,
-	      void	*devPrivate)
+RRCrtcCreate (void	*devPrivate)
 {
-    rrScrPriv (pScreen);
     RRCrtcPtr	crtc;
-    RRCrtcPtr	*crtcs;
     
     crtc = xalloc (sizeof (RRCrtcRec));
     if (!crtc)
 	return NULL;
-    if (pScrPriv->numCrtcs)
-	crtcs = xrealloc (pScrPriv->crtcs, 
-			  (pScrPriv->numCrtcs + 1) * sizeof (RRCrtcPtr));
-    else
-	crtcs = xalloc (sizeof (RRCrtcPtr));
-    if (!crtcs)
-    {
-	xfree (crtc);
-	return NULL;
-    }
     crtc->id = FakeClientID (0);
-    crtc->pScreen = pScreen;
+    crtc->pScreen = NULL;
     crtc->mode = NULL;
     crtc->x = 0;
     crtc->y = 0;
@@ -84,11 +75,37 @@ RRCrtcCreate (ScreenPtr	pScreen,
     if (!AddResource (crtc->id, RRCrtcType, (pointer) crtc))
 	return NULL;
 
+    return crtc;
+}
+
+/*
+ * Attach a Crtc to a screen. This is done as a separate step
+ * so that an xf86-based driver can create CRTCs in PreInit
+ * before the Screen has been created
+ */
+
+Bool
+RRCrtcAttachScreen (RRCrtcPtr crtc, ScreenPtr pScreen)
+{
+    rrScrPriv (pScreen);
+    RRCrtcPtr	*crtcs;
+
+    /* make space for the crtc pointer */
+    if (pScrPriv->numCrtcs)
+	crtcs = xrealloc (pScrPriv->crtcs, 
+			  (pScrPriv->numCrtcs + 1) * sizeof (RRCrtcPtr));
+    else
+	crtcs = xalloc (sizeof (RRCrtcPtr));
+    if (!crtcs)
+	return FALSE;
+    
+    /* attach the screen and crtc together */
+    crtc->pScreen = pScreen;
     pScrPriv->crtcs = crtcs;
     pScrPriv->crtcs[pScrPriv->numCrtcs++] = crtc;
 
     RRCrtcChanged (crtc, TRUE);
-    return crtc;
+    return TRUE;
 }
 
 /*
@@ -243,7 +260,6 @@ RRCrtcSet (RRCrtcPtr    crtc,
 	   RROutputConfigPtr  outputs)
 {
     ScreenPtr	pScreen = crtc->pScreen;
-    rrScrPriv(pScreen);
 
     /* See if nothing changed */
     if (crtc->mode == mode &&
@@ -255,45 +271,49 @@ RRCrtcSet (RRCrtcPtr    crtc,
     {
 	return TRUE;
     }
-#if RANDR_12_INTERFACE
-    if (pScrPriv->rrCrtcSet)
-    {
-	return (*pScrPriv->rrCrtcSet) (pScreen, crtc, mode, x, y, 
-				       rotation, numOutputs, outputs);
-    }
-#endif
-#if RANDR_10_INTERFACE
-    if (pScrPriv->rrSetConfig)
+    if (pScreen)
     {
-	RRScreenSize	    size;
-	RRScreenRate	    rate;
-	Bool		    ret;
-
-	size.width = mode->mode.width;
-	size.height = mode->mode.height;
-	if (outputs[0].output->mmWidth && outputs[0].output->mmHeight)
+#if RANDR_12_INTERFACE
+	rrScrPriv(pScreen);
+	if (pScrPriv->rrCrtcSet)
 	{
-	    size.mmWidth = outputs[0].output->mmWidth;
-	    size.mmHeight = outputs[0].output->mmHeight;
+	    return (*pScrPriv->rrCrtcSet) (pScreen, crtc, mode, x, y, 
+					   rotation, numOutputs, outputs);
 	}
-	else
+#endif
+#if RANDR_10_INTERFACE
+	if (pScrPriv->rrSetConfig)
 	{
-	    size.mmWidth = pScreen->mmWidth;
-	    size.mmHeight = pScreen->mmHeight;
+	    RRScreenSize	    size;
+	    RRScreenRate	    rate;
+	    Bool		    ret;
+
+	    size.width = mode->mode.width;
+	    size.height = mode->mode.height;
+	    if (outputs[0].output->mmWidth && outputs[0].output->mmHeight)
+	    {
+		size.mmWidth = outputs[0].output->mmWidth;
+		size.mmHeight = outputs[0].output->mmHeight;
+	    }
+	    else
+	    {
+		size.mmWidth = pScreen->mmWidth;
+		size.mmHeight = pScreen->mmHeight;
+	    }
+	    size.nRates = 1;
+	    rate.rate = RRVerticalRefresh (&mode->mode);
+	    size.pRates = &rate;
+	    ret = (*pScrPriv->rrSetConfig) (pScreen, rotation, rate.rate, &size);
+	    /*
+	     * Old 1.0 interface tied screen size to mode size
+	     */
+	    if (ret)
+		RRCrtcNotify (crtc, mode, x, y, rotation, 1, &outputs[0].output);
+	    return ret;
 	}
-	size.nRates = 1;
-	rate.rate = RRVerticalRefresh (&mode->mode);
-	size.pRates = &rate;
-	ret = (*pScrPriv->rrSetConfig) (pScreen, rotation, rate.rate, &size);
-	/*
-	 * Old 1.0 interface tied screen size to mode size
-	 */
-	if (ret)
-	    RRCrtcNotify (crtc, mode, x, y, rotation, 1, &outputs[0].output);
-	return ret;
-    }
 #endif
-    RRTellChanged (pScreen);
+	RRTellChanged (pScreen);
+    }
     return FALSE;
 }
 
@@ -311,22 +331,26 @@ RRCrtcDestroyResource (pointer value, XID pid)
 {
     RRCrtcPtr	crtc = (RRCrtcPtr) value;
     ScreenPtr	pScreen = crtc->pScreen;
-    rrScrPriv(pScreen);
-    int		i;
 
-    for (i = 0; i < pScrPriv->numCrtcs; i++)
+    if (pScreen)
     {
-	if (pScrPriv->crtcs[i] == crtc)
+	rrScrPriv(pScreen);
+	int		i;
+    
+	for (i = 0; i < pScrPriv->numCrtcs; i++)
 	{
-	    memmove (pScrPriv->crtcs + i, pScrPriv->crtcs + i + 1,
-		     (pScrPriv->numCrtcs - (i - 1)) * sizeof (RRCrtcPtr));
-	    --pScrPriv->numCrtcs;
-	    break;
+	    if (pScrPriv->crtcs[i] == crtc)
+	    {
+		memmove (pScrPriv->crtcs + i, pScrPriv->crtcs + i + 1,
+			 (pScrPriv->numCrtcs - (i - 1)) * sizeof (RRCrtcPtr));
+		--pScrPriv->numCrtcs;
+		break;
+	    }
 	}
     }
     if (crtc->gammaRed)
 	xfree (crtc->gammaRed);
-    xfree (value);
+    xfree (crtc);
     return 1;
 }
 
@@ -343,15 +367,18 @@ RRCrtcGammaSet (RRCrtcPtr   crtc,
     Bool	ret = TRUE;
 #if RANDR_12_INTERFACE
     ScreenPtr	pScreen = crtc->pScreen;
-    rrScrPriv(pScreen);
 #endif
     
     memcpy (crtc->gammaRed, red, crtc->gammaSize * sizeof (CARD16));
     memcpy (crtc->gammaGreen, green, crtc->gammaSize * sizeof (CARD16));
     memcpy (crtc->gammaBlue, blue, crtc->gammaSize * sizeof (CARD16));
 #if RANDR_12_INTERFACE
-    if (pScrPriv->rrCrtcSetGamma)
-	ret = (*pScrPriv->rrCrtcSetGamma) (pScreen, crtc);
+    if (pScreen)
+    {
+	rrScrPriv(pScreen);
+	if (pScrPriv->rrCrtcSetGamma)
+	    ret = (*pScrPriv->rrCrtcSetGamma) (pScreen, crtc);
+    }
 #endif
     return ret;
 }
@@ -433,6 +460,9 @@ ProcRRGetCrtcInfo (ClientPtr client)
     if (!crtc)
 	return RRErrorBase + BadRRCrtc;
 
+    /* All crtcs must be associated with screens before client
+     * requests are processed
+     */
     pScreen = crtc->pScreen;
     pScrPriv = rrGetScrPriv(pScreen);
 
@@ -589,7 +619,7 @@ ProcRRSetCrtcConfig (ClientPtr client)
 	for (j = 0; j < outputs[i].output->numCrtcs; j++)
 	    if (outputs[i].output->crtcs[j] == crtc)
 		break;
-	if (j == outputs[j].output->numCrtcs)
+	if (j == outputs[i].output->numCrtcs)
 	{
 	    if (outputs)
 		xfree (outputs);
diff --git a/randr/rrinfo.c b/randr/rrinfo.c
index e92caadfa..244b089f3 100644
--- a/randr/rrinfo.c
+++ b/randr/rrinfo.c
@@ -44,7 +44,7 @@ RROldModeAdd (RROutputPtr output, RRScreenSizePtr size, int refresh)
     modeInfo.dotClock = ((CARD32) size->width * (CARD32) size->height *
 			 (CARD32) refresh);
     modeInfo.nameLength = strlen (name);
-    mode = RRModeGet (pScreen, &modeInfo, name);
+    mode = RRModeGet (&modeInfo, name);
     if (!mode)
 	return NULL;
     for (i = 0; i < output->numModes; i++)
@@ -90,12 +90,19 @@ RRScanOldConfig (ScreenPtr pScreen, Rotation rotations)
     if (pScrPriv->numOutputs == 0 &&
 	pScrPriv->numCrtcs == 0)
     {
-	crtc = RRCrtcCreate (pScreen, NULL);
+	crtc = RRCrtcCreate (NULL);
 	if (!crtc)
 	    return;
-	output = RROutputCreate (pScreen, "default", 7, NULL);
+	if (!RRCrtcAttachScreen (crtc, pScreen))
+	{
+	    RRCrtcDestroy (crtc);
+	    return;
+	}
+	output = RROutputCreate ("default", 7, NULL);
 	if (!output)
 	    return;
+	if (!RROutputAttachScreen (output, pScreen))
+	    return;
 	RROutputSetCrtcs (output, &crtc, 1);
 	RROutputSetCrtc (output, crtc);
 	RROutputSetConnection (output, RR_Connected);
@@ -206,7 +213,6 @@ RRGetInfo (ScreenPtr pScreen)
     if (pScrPriv->nSizes)
 	RRScanOldConfig (pScreen, rotations);
 #endif
-    RRModePruneUnused (pScreen);
     RRTellChanged (pScreen);
     return TRUE;
 }
diff --git a/randr/rrmode.c b/randr/rrmode.c
index fb4b5eb1e..3cd9ef273 100644
--- a/randr/rrmode.c
+++ b/randr/rrmode.c
@@ -42,19 +42,23 @@ RRModeEqual (xRRModeInfo *a, xRRModeInfo *b)
     return TRUE;
 }
 
+/*
+ * Keep a list so it's easy to find modes in the resource database.
+ */
+static int	    num_modes;
+static RRModePtr    *modes;
+
 RRModePtr
-RRModeGet (ScreenPtr	pScreen,
-	   xRRModeInfo	*modeInfo,
+RRModeGet (xRRModeInfo	*modeInfo,
 	   const char	*name)
 {
-    rrScrPriv (pScreen);
     int	i;
     RRModePtr	mode;
-    RRModePtr	*modes;
+    RRModePtr	*newModes;
 
-    for (i = 0; i < pScrPriv->numModes; i++)
+    for (i = 0; i < num_modes; i++)
     {
-	mode = pScrPriv->modes[i];
+	mode = modes[i];
 	if (RRModeEqual (&mode->mode, modeInfo) &&
 	    !memcmp (name, mode->name, modeInfo->nameLength))
 	{
@@ -71,16 +75,14 @@ RRModeGet (ScreenPtr	pScreen,
     mode->name = (char *) (mode + 1);
     memcpy (mode->name, name, modeInfo->nameLength);
     mode->name[modeInfo->nameLength] = '\0';
-    mode->screen = pScreen;
     mode->userDefined = FALSE;
 
-    if (pScrPriv->numModes)
-	modes = xrealloc (pScrPriv->modes,
-			  (pScrPriv->numModes + 1) * sizeof (RRModePtr));
+    if (num_modes)
+	newModes = xrealloc (modes, (num_modes + 1) * sizeof (RRModePtr));
     else
-	modes = xalloc (sizeof (RRModePtr));
+	newModes = xalloc (sizeof (RRModePtr));
 
-    if (!modes)
+    if (!newModes)
     {
 	xfree (mode);
 	return NULL;
@@ -89,37 +91,64 @@ RRModeGet (ScreenPtr	pScreen,
     mode->mode.id = FakeClientID(0);
     if (!AddResource (mode->mode.id, RRModeType, (pointer) mode))
 	return NULL;
+    modes = newModes;
+    modes[num_modes++] = mode;
+    
+    /*
+     * give the caller a reference to this mode
+     */
     ++mode->refcnt;
-    pScrPriv->modes = modes;
-    pScrPriv->modes[pScrPriv->numModes++] = mode;
-    pScrPriv->changed = TRUE;
     return mode;
 }
 
+RRModePtr *
+RRModesForScreen (ScreenPtr pScreen, int *num_ret)
+{
+    rrScrPriv(pScreen);
+    int	o;
+    RRModePtr	*screen_modes;
+    int		num_screen_modes = 0;
+
+    screen_modes = xalloc ((num_modes ? num_modes : 1) * sizeof (RRModePtr));
+    
+    for (o = 0; o < pScrPriv->numOutputs; o++)
+    {
+	RROutputPtr	output = pScrPriv->outputs[o];
+	int		m, n;
+
+	for (m = 0; m < output->numModes; m++)
+	{
+	    RRModePtr	mode = output->modes[m];
+	    for (n = 0; n < num_screen_modes; n++)
+		if (screen_modes[n] == mode)
+		    break;
+	    if (n == num_screen_modes)
+		screen_modes[num_screen_modes++] = mode;
+	}
+    }
+    *num_ret = num_screen_modes;
+    return screen_modes;
+}
+
 void
 RRModeDestroy (RRModePtr mode)
 {
-    ScreenPtr	    pScreen;
-    rrScrPrivPtr    pScrPriv;
     int	m;
     
     if (--mode->refcnt > 0)
 	return;
-    pScreen = mode->screen;
-    pScrPriv = rrGetScrPriv (pScreen);
-    for (m = 0; m < pScrPriv->numModes; m++)
+    for (m = 0; m < num_modes; m++)
     {
-	if (pScrPriv->modes[m] == mode)
+	if (modes[m] == mode)
 	{
-	    memmove (pScrPriv->modes + m, pScrPriv->modes + m + 1,
-		     (pScrPriv->numModes - m - 1) * sizeof (RRModePtr));
-	    pScrPriv->numModes--;
-	    if (!pScrPriv->numModes)
+	    memmove (modes + m, modes + m + 1,
+		     (num_modes - m - 1) * sizeof (RRModePtr));
+	    num_modes--;
+	    if (!num_modes)
 	    {
-		xfree (pScrPriv->modes);
-		pScrPriv->modes = NULL;
+		xfree (modes);
+		modes = NULL;
 	    }
-	    pScrPriv->changed = TRUE;
 	    break;
 	}
     }
@@ -137,6 +166,8 @@ RRModeDestroyResource (pointer value, XID pid)
 Bool
 RRModeInit (void)
 {
+    assert (num_modes == 0);
+    assert (modes == NULL);
     RRModeType = CreateNewResourceType (RRModeDestroyResource);
     if (!RRModeType)
 	return FALSE;
@@ -146,26 +177,6 @@ RRModeInit (void)
     return TRUE;
 }
 
-void
-RRModePruneUnused (ScreenPtr pScreen)
-{
-    rrScrPriv (pScreen);
-    RRModePtr	*unused, mode;
-    int		m;
-    int		num = pScrPriv->numModes;
-
-    unused = xalloc (num * sizeof (RRModePtr));
-    if (!unused)
-	return;
-    memcpy (unused, pScrPriv->modes, num * sizeof (RRModePtr));
-    for (m = 0; m < num; m++) {
-	mode = unused[m];
-	if (mode->refcnt == 1 && !mode->userDefined)
-	    FreeResource (mode->mode.id, 0);
-    }
-    xfree (unused);
-}
-
 int
 ProcRRCreateMode (ClientPtr client)
 {
@@ -205,4 +216,3 @@ ProcRRDeleteOutputMode (ClientPtr client)
     (void) stuff;
     return BadImplementation; 
 }
-
diff --git a/randr/rroutput.c b/randr/rroutput.c
index 1f6f33030..1b0ecab93 100644
--- a/randr/rroutput.c
+++ b/randr/rroutput.c
@@ -42,30 +42,17 @@ RROutputChanged (RROutputPtr output)
  */
 
 RROutputPtr
-RROutputCreate (ScreenPtr   pScreen,
-		const char  *name,
+RROutputCreate (const char  *name,
 		int	    nameLength,
 		void	    *devPrivate)
 {
-    rrScrPriv (pScreen);
     RROutputPtr	output;
-    RROutputPtr	*outputs;
 
     output = xalloc (sizeof (RROutputRec) + nameLength + 1);
     if (!output)
 	return NULL;
-    if (pScrPriv->numOutputs)
-	outputs = xrealloc (pScrPriv->outputs, 
-			    (pScrPriv->numOutputs + 1) * sizeof (RROutputPtr));
-    else
-	outputs = xalloc (sizeof (RROutputPtr));
-    if (!outputs)
-    {
-	xfree (output);
-	return NULL;
-    }
     output->id = FakeClientID (0);
-    output->pScreen = pScreen;
+    output->pScreen = NULL;
     output->name = (char *) (output + 1);
     output->nameLength = nameLength;
     memcpy (output->name, name, nameLength);
@@ -91,12 +78,35 @@ RROutputCreate (ScreenPtr   pScreen,
     if (!AddResource (output->id, RROutputType, (pointer) output))
 	return NULL;
 
+    return output;
+}
+
+/*
+ * Attach an Output to a screen. This is done as a separate step
+ * so that an xf86-based driver can create Outputs in PreInit
+ * before the Screen has been created
+ */
+
+Bool
+RROutputAttachScreen (RROutputPtr output, ScreenPtr pScreen)
+{
+    rrScrPriv (pScreen);
+    RROutputPtr	*outputs;
+    
+    if (pScrPriv->numOutputs)
+	outputs = xrealloc (pScrPriv->outputs, 
+			    (pScrPriv->numOutputs + 1) * sizeof (RROutputPtr));
+    else
+	outputs = xalloc (sizeof (RROutputPtr));
+    if (!outputs)
+	return FALSE;
+    output->pScreen = pScreen;
     pScrPriv->outputs = outputs;
     pScrPriv->outputs[pScrPriv->numOutputs++] = output;
     RROutputChanged (output);
-    return output;
+    return TRUE;
 }
-
+		      
 /*
  * Notify extension that output parameters have been changed
  */
diff --git a/randr/rrscreen.c b/randr/rrscreen.c
index 705e7d78c..d47e9d60a 100644
--- a/randr/rrscreen.c
+++ b/randr/rrscreen.c
@@ -360,6 +360,13 @@ ProcRRGetScreenResources (ClientPtr client)
     }
     else
     {
+	RRModePtr   *modes;
+	int	    num_modes;
+
+	modes = RRModesForScreen (pScreen, &num_modes);
+	if (!modes)
+	    return BadAlloc;
+	
 	rep.type = X_Reply;
 	rep.sequenceNumber = client->sequence;
 	rep.length = 0;
@@ -367,15 +374,15 @@ ProcRRGetScreenResources (ClientPtr client)
 	rep.configTimestamp = pScrPriv->lastConfigTime.milliseconds;
 	rep.nCrtcs = pScrPriv->numCrtcs;
 	rep.nOutputs = pScrPriv->numOutputs;
-	rep.nModes = pScrPriv->numModes;;
+	rep.nModes = num_modes;
 	rep.nbytesNames = 0;
 
-	for (i = 0; i < pScrPriv->numModes; i++)
-	    rep.nbytesNames += pScrPriv->modes[i]->mode.nameLength;
+	for (i = 0; i < num_modes; i++)
+	    rep.nbytesNames += modes[i]->mode.nameLength;
 
 	rep.length = (pScrPriv->numCrtcs + 
 		      pScrPriv->numOutputs + 
-		      pScrPriv->numModes * (SIZEOF(xRRModeInfo) >> 2) +
+		      num_modes * (SIZEOF(xRRModeInfo) >> 2) +
 		      ((rep.nbytesNames + 3) >> 2));
 	
 	extraLen = rep.length << 2;
@@ -383,7 +390,10 @@ ProcRRGetScreenResources (ClientPtr client)
 	{
 	    extra = xalloc (extraLen);
 	    if (!extra)
+	    {
+		xfree (modes);
 		return BadAlloc;
+	    }
 	}
 	else
 	    extra = NULL;
@@ -391,7 +401,7 @@ ProcRRGetScreenResources (ClientPtr client)
 	crtcs = (RRCrtc *) extra;
 	outputs = (RROutput *) (crtcs + pScrPriv->numCrtcs);
 	modeinfos = (xRRModeInfo *) (outputs + pScrPriv->numOutputs);
-	names = (CARD8 *) (modeinfos + pScrPriv->numModes);
+	names = (CARD8 *) (modeinfos + num_modes);
 	
 	for (i = 0; i < pScrPriv->numCrtcs; i++)
 	{
@@ -407,9 +417,10 @@ ProcRRGetScreenResources (ClientPtr client)
 		swapl (&outputs[i], n);
 	}
 	
-	for (i = 0; i < pScrPriv->numModes; i++)
+	for (i = 0; i < num_modes; i++)
 	{
-	    modeinfos[i] = pScrPriv->modes[i]->mode;
+	    RRModePtr	mode = modes[i];
+	    modeinfos[i] = mode->mode;
 	    if (client->swapped)
 	    {
 		swapl (&modeinfos[i].id, n);
@@ -426,10 +437,11 @@ ProcRRGetScreenResources (ClientPtr client)
 		swaps (&modeinfos[i].nameLength, n);
 		swapl (&modeinfos[i].modeFlags, n);
 	    }
-	    memcpy (names, pScrPriv->modes[i]->name, 
-		    pScrPriv->modes[i]->mode.nameLength);
-	    names += pScrPriv->modes[i]->mode.nameLength;
+	    memcpy (names, mode->name, 
+		    mode->mode.nameLength);
+	    names += mode->mode.nameLength;
 	}
+    	xfree (modes);
 	assert (((((char *) names - (char *) extra) + 3) >> 2) == rep.length);
     }