/*  * This file is part of the UCB release of Plan 9. It is subject to the license * terms in the LICENSE file found in the top-level directory of this * distribution and at http://akaros.cs.berkeley.edu/files/Plan9License. No * part of the UCB release of Plan 9, including this file, may be copied, * modified, propagated, or distributed except according to the terms contained * in the LICENSE file. */ #include <u.h>#include <libc.h>#include <draw.h>#include <memdraw.h> intunloadmemimage(Memimage *i, Rectangle r, uchar *data, int ndata){	int y, l;	uchar *q; 	if(!rectinrect(r, i->r))		return -1;	l = bytesperline(r, i->depth);	if(ndata < l*Dy(r))		return -1;	ndata = l*Dy(r);	q = byteaddr(i, r.min);	for(y=r.min.y; y<r.max.y; y++){		memmove(data, q, l);		q += i->width*sizeof(ulong);		data += l;	}	return ndata;}