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.

1 files changed, 424 insertions, 0 deletions

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);
+}