successfully queries the server for atoms and extensions

[dana/dcompmgr.git] / dcompmgr.c

diff --git a/dcompmgr.c b/dcompmgr.c
index 175b522..1c4a5f9 100644 (file)
--- a/dcompmgr.c
+++ b/dcompmgr.c
@@ -71,6 +71,27 @@ main(int argc, char **argv)
         return 1;
     }
 
+    if (!dpy->composite.present) {
+        printf(_("no composite extension present on the display\n"));
+        display_unref(dpy);
+        return 1;
+    }
+    if (!dpy->xfixes.present) {
+        printf(_("no xfixes extension present on the display\n"));
+        display_unref(dpy);
+        return 1;
+    }
+    if (!dpy->damage.present) {
+        printf(_("no damage extension present on the display\n"));
+        display_unref(dpy);
+        return 1;
+    }
+    if (!dpy->render.present) {
+        printf(_("no render extension present on the display\n"));
+        display_unref(dpy);
+        return 1;
+    }
+
     nscreens = all_screens(dpy, &screens);
     if (nscreens < 1) {
         printf(_("found no screens to run on\n"));