966 RegionAppend(RegionPtr dstrgn, RegionPtr rgn)  in RegionAppend()  argument
973         return RegionBreak(dstrgn);  in RegionAppend()
975     if (!rgn->data && (dstrgn->data == &RegionEmptyData)) {  in RegionAppend()
976         dstrgn->extents = rgn->extents;  in RegionAppend()
977         dstrgn->data = NULL;  in RegionAppend()
986     dnumRects = RegionNumRects(dstrgn);  in RegionAppend()
989     RECTALLOC(dstrgn, size);  in RegionAppend()
992         dstrgn->extents = rgn->extents;  in RegionAppend()
993     else if (dstrgn->extents.x2 > dstrgn->extents.x1) {  in RegionAppend()
997         last = RegionBoxptr(dstrgn) + (dnumRects - 1);  in RegionAppend()
1001             if (rgn->extents.x1 < dstrgn->extents.x1)  in RegionAppend()
1002                 dstrgn->extents.x1 = rgn->extents.x1;  in RegionAppend()
1003             if (rgn->extents.x2 > dstrgn->extents.x2)  in RegionAppend()
1004                 dstrgn->extents.x2 = rgn->extents.x2;  in RegionAppend()
1005             dstrgn->extents.y2 = rgn->extents.y2;  in RegionAppend()
1008             first = RegionBoxptr(dstrgn);  in RegionAppend()
1014                 if (rgn->extents.x1 < dstrgn->extents.x1)  in RegionAppend()
1015                     dstrgn->extents.x1 = rgn->extents.x1;  in RegionAppend()
1016                 if (rgn->extents.x2 > dstrgn->extents.x2)  in RegionAppend()
1017                     dstrgn->extents.x2 = rgn->extents.x2;  in RegionAppend()
1018                 dstrgn->extents.y1 = rgn->extents.y1;  in RegionAppend()
1021                 dstrgn->extents.x2 = dstrgn->extents.x1;  in RegionAppend()
1025         new = RegionBox(dstrgn, numRects);  in RegionAppend()
1027             *new = *RegionBoxptr(dstrgn);  in RegionAppend()
1029             memmove((char *) new, (char *) RegionBoxptr(dstrgn),  in RegionAppend()
1031         new = RegionBoxptr(dstrgn);  in RegionAppend()
1034         new = RegionBoxptr(dstrgn) + dnumRects;  in RegionAppend()
1039     dstrgn->data->numRects += numRects;  in RegionAppend()