#include <u.h>#include <libc.h>#include <draw.h> enum{	Max = 100}; Pointstring(Image *dst, Point pt, Image *src, Point sp, Font *f, char *s){	return _string(dst, pt, src, sp, f, s, nil, 1<<24, dst->clipr, nil, ZP);} Pointstringn(Image *dst, Point pt, Image *src, Point sp, Font *f, char *s, int len){	return _string(dst, pt, src, sp, f, s, nil, len, dst->clipr, nil, ZP);} Pointrunestring(Image *dst, Point pt, Image *src, Point sp, Font *f, Rune *r){	return _string(dst, pt, src, sp, f, nil, r, 1<<24, dst->clipr, nil, ZP);} Pointrunestringn(Image *dst, Point pt, Image *src, Point sp, Font *f, Rune *r, int len){	return _string(dst, pt, src, sp, f, nil, r, len, dst->clipr, nil, ZP);} Point_string(Image *dst, Point pt, Image *src, Point sp, Font *f, char *s, Rune *r, int len, Rectangle clipr, Image *bg, Point bgp){	int m, n, wid, max;	ushort cbuf[Max], *c, *ec;	uchar *b;	char *subfontname;	char **sptr;	Rune **rptr;	Font *def; 	if(s == nil){		s = "";		sptr = nil;	}else		sptr = &s;	if(r == nil){		r = L"";		rptr = nil;	}else		rptr = &r;	while((*s || *r) && len){		max = Max;		if(len < max)			max = len;		n = cachechars(f, sptr, rptr, cbuf, max, &wid, &subfontname);		if(n > 0){			m = 47+2*n;			if(bg)				m += 4+2*4;			b = bufimage(dst->display, m);			if(b == 0){				fprint(2, "string: %r\n");				break;			}			if(bg)				b[0] = 'x';			else				b[0] = 's';			BPLONG(b+1, dst->id);			BPLONG(b+5, src->id);			BPLONG(b+9, f->cacheimage->id);			BPLONG(b+13, pt.x);			BPLONG(b+17, pt.y+f->ascent);			BPLONG(b+21, clipr.min.x);			BPLONG(b+25, clipr.min.y);			BPLONG(b+29, clipr.max.x);			BPLONG(b+33, clipr.max.y);			BPLONG(b+37, sp.x);			BPLONG(b+41, sp.y);			BPSHORT(b+45, n);			b += 47;			if(bg){				BPLONG(b, bg->id);				BPLONG(b+4, bgp.x);				BPLONG(b+8, bgp.y);				b += 12;			}			ec = &cbuf[n];			for(c=cbuf; c<ec; c++, b+=2)				BPSHORT(b, *c);			pt.x += wid;			bgp.x += wid;			agefont(f);			len -= n;		}		if(subfontname){			if(_getsubfont(f->display, subfontname) == 0){				def = f->display->defaultfont;				if(def && f!=def)					f = def;				else					break;			}		}	}	return pt;}