726     RegionRec totalClip, childClip, exposed;  in miOverlayValidateTree()  local
737     RegionNull(&totalClip);  in miOverlayValidateTree()
755         RegionCopy(&totalClip, &tParent->borderClip);  in miOverlayValidateTree()
756         RegionIntersect(&totalClip, &totalClip, &tParent->pWin->winSize);  in miOverlayValidateTree()
760                 RegionSubtract(&totalClip, &totalClip, &tWin->pWin->borderSize);  in miOverlayValidateTree()
767                 RegionAppend(&totalClip, &tWin->borderClip);  in miOverlayValidateTree()
769         RegionValidate(&totalClip, &overlap);  in miOverlayValidateTree()
773         RegionUnion(&totalClip, &totalClip, &tParent->clipList);  in miOverlayValidateTree()
778                 RegionIntersect(&childClip, &totalClip,  in miOverlayValidateTree()
781                 RegionSubtract(&totalClip, &totalClip, &tWin->pWin->borderSize);  in miOverlayValidateTree()
803             RegionSubtract(&tParent->valdata->exposed, &totalClip,  in miOverlayValidateTree()
807         RegionCopy(&tParent->clipList, &totalClip);  in miOverlayValidateTree()
813     RegionUninit(&totalClip);  in miOverlayValidateTree()