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(s == nil){
71 		s = "";
72 		sptr = nil;
73 	}else
74 		sptr = &s;
75 	if(r == nil){
76 		r = (Rune*) L"";
77 		rptr = nil;
78 	}else
79 		rptr = &r;
80 	sf = nil;
81 	while((*s || *r) && len){
82 		max = Max;
83 		if(len < max)
84 			max = len;
85 		n = cachechars(f, sptr, rptr, cbuf, max, &wid, &subfontname);
86 		if(n > 0){
87 			_setdrawop(dst->display, op);
88 
89 			m = 47+2*n;
90 			if(bg)
91 				m += 4+2*4;
92 			b = bufimage(dst->display, m);
93 			if(b == 0){
94 				fprint(2, "string: %r\n");
95 				break;
96 			}
97 			if(bg)
98 				b[0] = 'x';
99 			else
100 				b[0] = 's';
101 			BPLONG(b+1, dst->id);
102 			BPLONG(b+5, src->id);
103 			BPLONG(b+9, f->cacheimage->id);
104 			BPLONG(b+13, pt.x);
105 			BPLONG(b+17, pt.y+f->ascent);
106 			BPLONG(b+21, clipr.min.x);
107 			BPLONG(b+25, clipr.min.y);
108 			BPLONG(b+29, clipr.max.x);
109 			BPLONG(b+33, clipr.max.y);
110 			BPLONG(b+37, sp.x);
111 			BPLONG(b+41, sp.y);
112 			BPSHORT(b+45, n);
113 			b += 47;
114 			if(bg){
115 				BPLONG(b, bg->id);
116 				BPLONG(b+4, bgp.x);
117 				BPLONG(b+8, bgp.y);
118 				b += 12;
119 			}
120 			ec = &cbuf[n];
121 			for(c=cbuf; c<ec; c++, b+=2)
122 				BPSHORT(b, *c);
123 			pt.x += wid;
124 			bgp.x += wid;
125 			agefont(f);
126 			len -= n;
127 		}
128 		if(subfontname){
129 			freesubfont(sf);
130 			if((sf=_getsubfont(f->display, subfontname)) == 0){
131 				def = f->display ? f->display->defaultfont : nil;
132 				if(def && f!=def)
133 					f = def;
134 				else
135 					break;
136 			}
137 			/* 
138 			 * must not free sf until cachechars has found it in the cache
139 			 * and picked up its own reference.
140 			 */
141 		}
142 	}
143 	return pt;
144 }