tstring.c - plan9port - [fork] Plan 9 from user space
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tstring.c (3287B)
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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 }