#include <u.h>#include <libg.h>#include <layer.h> static void_ltofront(Layer *dl, Rectangle r, Layer *l, void *ignore){	USED(ignore);	if(dl == (Layer *)l->cache)		bitblt(l->cover->layer, r.min, l->cache, r, S);} voidltofront(Layer *l){	Layer *tl, *cl; 	cl = l->cover->front;	if(cl == l)		cl = 0;	else		while(cl->next != l)			cl = cl->next;	if(cl)		for(tl=l->cover->front; tl!=l; tl=tl->next)			if(rectXrect(l->r, tl->r) && tl->vis==Visible)				bitblt(tl->cache, tl->r.min,					l->cover->layer, tl->r, S);	layerop(_ltofront, l->r, l, (void *)0);	_ldelete(l);	_linsertfront(l);	if(cl)		for(tl=l->cover->front;; tl=tl->next){			if(rectXrect(l->r, tl->r))				_lvis(tl);			if(tl == cl)				break;		}	_lvis(l);	/* could be offscreen, so not Visible */}