#include <u.h>#include <libc.h>#include <libg.h> Rectanglebscreenrect(Rectangle *clipr){	uchar buf[34];	Rectangle r; 	bneed(0);	if(write(bitbltfd, "i", 1) != 1)		berror("bscreenrect write /dev/bitblt");	if(read(bitbltfd, buf, sizeof buf)!=sizeof buf || buf[0]!='I')		berror("binit read");	r.min.x = BGLONG(buf+2);	r.min.y = BGLONG(buf+6);	r.max.x = BGLONG(buf+10);	r.max.y = BGLONG(buf+14);	if(clipr){		clipr->min.x = BGLONG(buf+18);		clipr->min.y = BGLONG(buf+22);		clipr->max.x = BGLONG(buf+26);		clipr->max.y = BGLONG(buf+30);	}	return r;}