+ int ncrtc = 0;
+#endif /* SWM_XRR_HAS_CRTC */
+ struct swm_region *r;
+
+
+ if (i >= ScreenCount(display))
+ errx(1, "invalid screen");
+
+ /* remove any old regions */
+ while ((r = TAILQ_FIRST(&screens[i].rl)) != NULL) {
+ r->ws->r = NULL;
+ XDestroyWindow(display, r->bar_window);
+ TAILQ_REMOVE(&screens[i].rl, r, entry);
+ TAILQ_INSERT_TAIL(&screens[i].orl, r, entry);
+ }
+
+ /* map virtual screens onto physical screens */
+#ifdef SWM_XRR_HAS_CRTC
+ if (xrandr_support) {
+ sr = XRRGetScreenResources(display, screens[i].root);
+ if (sr == NULL)
+ new_region(&screens[i], 0, 0,
+ DisplayWidth(display, i),
+ DisplayHeight(display, i));
+ else
+ ncrtc = sr->ncrtc;
+
+ for (c = 0, ci = NULL; c < ncrtc; c++) {
+ ci = XRRGetCrtcInfo(display, sr, sr->crtcs[c]);
+ if (ci->noutput == 0)
+ continue;
+
+ if (ci != NULL && ci->mode == None)
+ new_region(&screens[i], 0, 0,
+ DisplayWidth(display, i),
+ DisplayHeight(display, i));
+ else
+ new_region(&screens[i],
+ ci->x, ci->y, ci->width, ci->height);
+ }
+ if (ci)
+ XRRFreeCrtcInfo(ci);
+ XRRFreeScreenResources(sr);
+ } else