1 #include <u.h>
2 #include <libc.h>
3 #include <draw.h>
4 
5 enum
6 {
7 	Max = 100
8 };
9 
10 Point
11 string(Image *dst, Point pt, Image *src, Point sp, Font *f, char *s)
12 {
13 	return _string(dst, pt, src, sp, f, s, nil, 1<<24, dst->clipr, nil, ZP, SoverD);
14 }
15 
16 Point
17 stringop(Image *dst, Point pt, Image *src, Point sp, Font *f, char *s, Drawop op)
18 {
19 	return _string(dst, pt, src, sp, f, s, nil, 1<<24, dst->clipr, nil, ZP, op);
20 }
21 
22 Point
23 stringn(Image *dst, Point pt, Image *src, Point sp, Font *f, char *s, int len)
24 {
25 	return _string(dst, pt, src, sp, f, s, nil, len, dst->clipr, nil, ZP, SoverD);
26 }
27 
28 Point
29 stringnop(Image *dst, Point pt, Image *src, Point sp, Font *f, char *s, int len, Drawop op)
30 {
31 	return _string(dst, pt, src, sp, f, s, nil, len, dst->clipr, nil, ZP, op);
32 }
33 
34 Point
35 runestring(Image *dst, Point pt, Image *src, Point sp, Font *f, Rune *r)
36 {
37 	return _string(dst, pt, src, sp, f, nil, r, 1<<24, dst->clipr, nil, ZP, SoverD);
38 }
39 
40 Point
41 runestringop(Image *dst, Point pt, Image *src, Point sp, Font *f, Rune *r, Drawop op)
42 {
43 	return _string(dst, pt, src, sp, f, nil, r, 1<<24, dst->clipr, nil, ZP, op);
44 }
45 
46 Point
47 runestringn(Image *dst, Point pt, Image *src, Point sp, Font *f, Rune *r, int len)
48 {
49 	return _string(dst, pt, src, sp, f, nil, r, len, dst->clipr, nil, ZP, SoverD);
50 }
51 
52 Point
53 runestringnop(Image *dst, Point pt, Image *src, Point sp, Font *f, Rune *r, int len, Drawop op)
54 {
55 	return _string(dst, pt, src, sp, f, nil, r, len, dst->clipr, nil, ZP, op);
56 }
57 
58 Point
59 _string(Image *dst, Point pt, Image *src, Point sp, Font *f, char *s, Rune *r, int len, Rectangle clipr, Image *bg, Point bgp, Drawop op)
60 {
61 	int m, n, wid, max;
62 	ushort cbuf[Max], *c, *ec;
63 	uchar *b;
64 	char *subfontname;
65 	char **sptr;
66 	Rune **rptr;
67 	Font *def;
68 	Subfont *sf;
69 
70 	if(len < 0)
71 		sysfatal("libdraw: _string len=%d", len);
72 
73 	if(s == nil){
74 		s = "";
75 		sptr = nil;
76 	}else
77 		sptr = &s;
78 	if(r == nil){
79 		r = (Rune*) L"";
80 		rptr = nil;
81 	}else
82 		rptr = &r;
83 	sf = nil;
84 #if defined(__AIX__)
85 	while((*s || *rptr) && len){
86 #else
87 	while((*s || *r) && len){
88 #endif
89 		max = Max;
90 		if(len < max)
91 			max = len;
92 		n = cachechars(f, sptr, rptr, cbuf, max, &wid, &subfontname);
93 		if(n > 0){
94 			_setdrawop(dst->display, op);
95 
96 			m = 47+2*n;
97 			if(bg)
98 				m += 4+2*4;
99 			b = bufimage(dst->display, m);
100 			if(b == 0){
101 				fprint(2, "string: %r\n");
102 				break;
103 			}
104 			if(bg)
105 				b[0] = 'x';
106 			else
107 				b[0] = 's';
108 			BPLONG(b+1, dst->id);
109 			BPLONG(b+5, src->id);
110 			BPLONG(b+9, f->cacheimage->id);
111 			BPLONG(b+13, pt.x);
112 			BPLONG(b+17, pt.y+f->ascent);
113 			BPLONG(b+21, clipr.min.x);
114 			BPLONG(b+25, clipr.min.y);
115 			BPLONG(b+29, clipr.max.x);
116 			BPLONG(b+33, clipr.max.y);
117 			BPLONG(b+37, sp.x);
118 			BPLONG(b+41, sp.y);
119 			BPSHORT(b+45, n);
120 			b += 47;
121 			if(bg){
122 				BPLONG(b, bg->id);
123 				BPLONG(b+4, bgp.x);
124 				BPLONG(b+8, bgp.y);
125 				b += 12;
126 			}
127 			ec = &cbuf[n];
128 			for(c=cbuf; c<ec; c++, b+=2)
129 				BPSHORT(b, *c);
130 			pt.x += wid;
131 			bgp.x += wid;
132 			agefont(f);
133 			len -= n;
134 		}
135 		if(subfontname){
136 			freesubfont(sf);
137 			if((sf=_getsubfont(f->display, subfontname)) == 0){
138 				def = f->display ? f->display->defaultfont : nil;
139 				if(def && f!=def)
140 					f = def;
141 				else
142 					break;
143 			}
144 			/*
145 			 * must not free sf until cachechars has found it in the cache
146 			 * and picked up its own reference.
147 			 */
148 		}
149 	}
150 	return pt;
151 }