From 9660be8b0b7990738d4e94096576132e7735223a Mon Sep 17 00:00:00 2001
From: okan <okan@openbsd.org>
Date: Fri, 26 Jun 2015 15:21:58 +0000
Subject: [PATCH] Replace screen region info gathering with XRandR equivalent
 of Xinerama queries (currently act on XRandR events anyway). Fall-back mode
 without XRandR is still what X provides. This removes -lXinerama.

---
 app/cwm/Makefile |  4 ++--
 app/cwm/calmwm.h |  3 +--
 app/cwm/screen.c | 45 ++++++++++++++++++++++++++++-----------------
 3 files changed, 31 insertions(+), 21 deletions(-)

diff --git a/app/cwm/Makefile b/app/cwm/Makefile
index 79469911e..d3498d00e 100644
--- a/app/cwm/Makefile
+++ b/app/cwm/Makefile
@@ -1,4 +1,4 @@
-# $OpenBSD: Makefile,v 1.20 2013/05/19 23:38:20 okan Exp $
+# $OpenBSD: Makefile,v 1.21 2015/06/26 15:21:58 okan Exp $
 
 .include <bsd.xconf.mk>
 
@@ -13,7 +13,7 @@ CPPFLAGS+=	-I${X11BASE}/include -I${X11BASE}/include/freetype2 -I${.CURDIR}
 CFLAGS+=	-Wall
 
 LDADD+=		-L${X11BASE}/lib -lXft -lXrender -lX11 -lxcb -lXau -lXdmcp \
-		-lfontconfig -lexpat -lfreetype -lz -lXinerama -lXrandr -lXext
+		-lfontconfig -lexpat -lfreetype -lz -lXrandr -lXext
 
 MANDIR=		${X11BASE}/man/man
 MAN=		cwm.1 cwmrc.5
diff --git a/app/cwm/calmwm.h b/app/cwm/calmwm.h
index 1555429fa..edb541a94 100644
--- a/app/cwm/calmwm.h
+++ b/app/cwm/calmwm.h
@@ -15,7 +15,7 @@
  * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
  * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
  *
- * $OpenBSD: calmwm.h,v 1.292 2015/06/09 13:02:15 okan Exp $
+ * $OpenBSD: calmwm.h,v 1.293 2015/06/26 15:21:58 okan Exp $
  */
 
 #ifndef _CALMWM_H_
@@ -28,7 +28,6 @@
 #include <X11/Xproto.h>
 #include <X11/Xutil.h>
 #include <X11/cursorfont.h>
-#include <X11/extensions/Xinerama.h>
 #include <X11/extensions/Xrandr.h>
 #include <X11/keysym.h>
 
diff --git a/app/cwm/screen.c b/app/cwm/screen.c
index 4e7c617c6..76fad3d07 100644
--- a/app/cwm/screen.c
+++ b/app/cwm/screen.c
@@ -15,7 +15,7 @@
  * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
  * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
  *
- * $OpenBSD: screen.c,v 1.71 2015/01/19 14:54:16 okan Exp $
+ * $OpenBSD: screen.c,v 1.72 2015/06/26 15:21:58 okan Exp $
  */
 
 #include <sys/types.h>
@@ -152,9 +152,8 @@ screen_find_xinerama(struct screen_ctx *sc, int x, int y, int flags)
 void
 screen_update_geometry(struct screen_ctx *sc)
 {
-	XineramaScreenInfo	*info = NULL;
 	struct region_ctx	*region;
-	int			 info_num = 0, i;
+	int			 i;
 
 	sc->view.x = 0;
 	sc->view.y = 0;
@@ -166,25 +165,37 @@ screen_update_geometry(struct screen_ctx *sc)
 	sc->work.w = sc->view.w - (sc->gap.left + sc->gap.right);
 	sc->work.h = sc->view.h - (sc->gap.top + sc->gap.bottom);
 
-	/* RandR event may have a CTRC added or removed. */
-	if (XineramaIsActive(X_Dpy))
-		info = XineramaQueryScreens(X_Dpy, &info_num);
-
 	while ((region = TAILQ_FIRST(&sc->regionq)) != NULL) {
 		TAILQ_REMOVE(&sc->regionq, region, entry);
 		free(region);
 	}
-	for (i = 0; i < info_num; i++) {
-		region = xmalloc(sizeof(*region));
-		region->num = i;
-		region->area.x = info[i].x_org;
-		region->area.y = info[i].y_org;
-		region->area.w = info[i].width;
-		region->area.h = info[i].height;
-		TAILQ_INSERT_TAIL(&sc->regionq, region, entry);
+
+	if (HasRandr) {
+		XRRScreenResources *sr;
+		XRRCrtcInfo *ci;
+
+		sr = XRRGetScreenResources(X_Dpy, sc->rootwin);
+		for (i = 0, ci = NULL; i < sr->ncrtc; i++) {
+			ci = XRRGetCrtcInfo(X_Dpy, sr, sr->crtcs[i]);
+			if (ci == NULL)
+				continue;
+			if (ci->noutput == 0) {
+				XRRFreeCrtcInfo(ci);
+				continue;
+			}
+
+			region = xmalloc(sizeof(*region));
+			region->num = i;
+			region->area.x = ci->x;
+			region->area.y = ci->y;
+			region->area.w = ci->width;
+			region->area.h = ci->height;
+			TAILQ_INSERT_TAIL(&sc->regionq, region, entry);
+
+			XRRFreeCrtcInfo(ci);
+		}
+		XRRFreeScreenResources(sr);
 	}
-	if (info)
-		XFree(info);
 
 	xu_ewmh_net_desktop_geometry(sc);
 	xu_ewmh_net_workarea(sc);