1 |
greg |
2.1 |
#ifndef lint |
2 |
greg |
2.19 |
static const char RCSid[] = "$Id: font.c,v 2.18 2004/03/26 21:29:19 schorsch Exp $"; |
3 |
greg |
2.1 |
#endif |
4 |
|
|
/* |
5 |
|
|
* Polygonal font handling routines |
6 |
|
|
*/ |
7 |
|
|
|
8 |
greg |
2.13 |
#include "copyright.h" |
9 |
greg |
2.12 |
|
10 |
schorsch |
2.18 |
#include <stdlib.h> |
11 |
|
|
|
12 |
greg |
2.19 |
#include "paths.h" |
13 |
schorsch |
2.17 |
#include "rtio.h" |
14 |
|
|
#include "rterror.h" |
15 |
greg |
2.1 |
#include "font.h" |
16 |
|
|
|
17 |
|
|
#define galloc(nv) (GLYPH *)malloc(sizeof(GLYPH)+2*sizeof(GORD)*(nv)) |
18 |
|
|
|
19 |
|
|
|
20 |
greg |
2.12 |
int retainfonts = 0; /* retain loaded fonts? */ |
21 |
greg |
2.1 |
|
22 |
|
|
static FONT *fontlist = NULL; /* list of loaded fonts */ |
23 |
|
|
|
24 |
|
|
|
25 |
|
|
FONT * |
26 |
|
|
getfont(fname) /* return font fname */ |
27 |
|
|
char *fname; |
28 |
|
|
{ |
29 |
|
|
FILE *fp; |
30 |
schorsch |
2.17 |
char *pathname, *err = NULL; |
31 |
greg |
2.3 |
unsigned wsum, hsum, ngly; |
32 |
greg |
2.11 |
int gn, ngv, gv; |
33 |
greg |
2.5 |
register GLYPH *g; |
34 |
greg |
2.1 |
GORD *gp; |
35 |
|
|
register FONT *f; |
36 |
|
|
|
37 |
|
|
for (f = fontlist; f != NULL; f = f->next) |
38 |
greg |
2.12 |
if (!strcmp(f->name, fname)) { |
39 |
|
|
f->nref++; |
40 |
greg |
2.1 |
return(f); |
41 |
greg |
2.12 |
} |
42 |
greg |
2.1 |
/* load the font file */ |
43 |
greg |
2.14 |
if ((pathname = getpath(fname, getrlibpath(), R_OK)) == NULL) { |
44 |
greg |
2.1 |
sprintf(errmsg, "cannot find font file \"%s\"", fname); |
45 |
|
|
error(USER, errmsg); |
46 |
|
|
} |
47 |
|
|
f = (FONT *)calloc(1, sizeof(FONT)); |
48 |
|
|
if (f == NULL) |
49 |
|
|
goto memerr; |
50 |
|
|
f->name = savestr(fname); |
51 |
greg |
2.12 |
f->nref = 1; |
52 |
greg |
2.1 |
if ((fp = fopen(pathname, "r")) == NULL) { |
53 |
|
|
sprintf(errmsg, "cannot open font file \"%s\"", |
54 |
|
|
pathname); |
55 |
|
|
error(SYSTEM, errmsg); |
56 |
|
|
} |
57 |
greg |
2.12 |
wsum = hsum = ngly = 0; /* get each glyph */ |
58 |
|
|
while ((ngv = fgetval(fp, 'i', (char *)&gn)) != EOF) { |
59 |
greg |
2.11 |
if (ngv == 0) |
60 |
greg |
2.1 |
goto nonint; |
61 |
greg |
2.3 |
if (gn < 1 || gn > 255) { |
62 |
greg |
2.1 |
err = "illegal"; |
63 |
|
|
goto fonterr; |
64 |
|
|
} |
65 |
|
|
if (f->fg[gn] != NULL) { |
66 |
|
|
err = "duplicate"; |
67 |
|
|
goto fonterr; |
68 |
|
|
} |
69 |
greg |
2.12 |
if (fgetval(fp, 'i', (char *)&ngv) <= 0 || |
70 |
|
|
ngv < 0 || ngv > 32000) { |
71 |
greg |
2.1 |
err = "bad # vertices for"; |
72 |
|
|
goto fonterr; |
73 |
|
|
} |
74 |
|
|
g = galloc(ngv); |
75 |
|
|
if (g == NULL) |
76 |
|
|
goto memerr; |
77 |
|
|
g->nverts = ngv; |
78 |
greg |
2.2 |
g->left = g->right = g->top = g->bottom = 128; |
79 |
greg |
2.1 |
ngv *= 2; |
80 |
|
|
gp = gvlist(g); |
81 |
|
|
while (ngv--) { |
82 |
greg |
2.12 |
if (fgetval(fp, 'i', (char *)&gv) <= 0 || |
83 |
|
|
gv < 0 || gv > 255) { |
84 |
greg |
2.1 |
err = "bad vertex for"; |
85 |
|
|
goto fonterr; |
86 |
|
|
} |
87 |
|
|
*gp++ = gv; |
88 |
greg |
2.2 |
if (ngv & 1) { /* follow x limits */ |
89 |
|
|
if (gv < g->left) |
90 |
|
|
g->left = gv; |
91 |
|
|
else if (gv > g->right) |
92 |
|
|
g->right = gv; |
93 |
|
|
} else { /* follow y limits */ |
94 |
|
|
if (gv < g->bottom) |
95 |
|
|
g->bottom = gv; |
96 |
|
|
else if (gv > g->top) |
97 |
|
|
g->top = gv; |
98 |
|
|
} |
99 |
greg |
2.1 |
} |
100 |
greg |
2.3 |
if (g->right - g->left && g->top - g->bottom) { |
101 |
|
|
ngly++; |
102 |
|
|
wsum += g->right - g->left; |
103 |
|
|
hsum += g->top - g->bottom; |
104 |
|
|
} |
105 |
greg |
2.1 |
f->fg[gn] = g; |
106 |
|
|
} |
107 |
|
|
fclose(fp); |
108 |
greg |
2.3 |
if (ngly) { |
109 |
|
|
f->mwidth = wsum / ngly; |
110 |
|
|
f->mheight = hsum / ngly; |
111 |
|
|
} |
112 |
greg |
2.1 |
f->next = fontlist; |
113 |
|
|
return(fontlist = f); |
114 |
|
|
nonint: |
115 |
|
|
sprintf(errmsg, "non-integer in font file \"%s\"", pathname); |
116 |
|
|
error(USER, errmsg); |
117 |
|
|
fonterr: |
118 |
|
|
sprintf(errmsg, "%s character (%d) in font file \"%s\"", |
119 |
|
|
err, gn, pathname); |
120 |
|
|
error(USER, errmsg); |
121 |
|
|
memerr: |
122 |
|
|
error(SYSTEM, "out of memory in fontglyph"); |
123 |
schorsch |
2.15 |
return NULL; /* pro forma return */ |
124 |
greg |
2.1 |
} |
125 |
greg |
2.2 |
|
126 |
|
|
|
127 |
greg |
2.12 |
void |
128 |
|
|
freefont(fnt) /* release a font (free all if NULL) */ |
129 |
|
|
FONT *fnt; |
130 |
greg |
2.6 |
{ |
131 |
|
|
FONT head; |
132 |
|
|
register FONT *fl, *f; |
133 |
|
|
register int i; |
134 |
greg |
2.12 |
/* check reference count */ |
135 |
schorsch |
2.16 |
if (fnt != NULL && ((fnt->nref-- > 1) | retainfonts)) |
136 |
greg |
2.12 |
return; |
137 |
greg |
2.6 |
head.next = fontlist; |
138 |
|
|
fl = &head; |
139 |
|
|
while ((f = fl->next) != NULL) |
140 |
schorsch |
2.16 |
if ((fnt == NULL) | (fnt == f)) { |
141 |
greg |
2.6 |
fl->next = f->next; |
142 |
|
|
for (i = 0; i < 256; i++) |
143 |
|
|
if (f->fg[i] != NULL) |
144 |
greg |
2.12 |
free((void *)f->fg[i]); |
145 |
greg |
2.6 |
freestr(f->name); |
146 |
greg |
2.12 |
free((void *)f); |
147 |
greg |
2.6 |
} else |
148 |
|
|
fl = f; |
149 |
|
|
fontlist = head.next; |
150 |
|
|
} |
151 |
|
|
|
152 |
|
|
|
153 |
greg |
2.2 |
int |
154 |
greg |
2.3 |
uniftext(sp, tp, f) /* uniformly space text line */ |
155 |
greg |
2.5 |
register short *sp; /* returned character spacing */ |
156 |
greg |
2.3 |
register char *tp; /* text line */ |
157 |
|
|
register FONT *f; /* font */ |
158 |
|
|
{ |
159 |
|
|
int linelen; |
160 |
|
|
|
161 |
|
|
linelen = *sp++ = 0; |
162 |
|
|
while (*tp) |
163 |
|
|
if (f->fg[*tp++&0xff] == NULL) |
164 |
|
|
*sp++ = 0; |
165 |
|
|
else |
166 |
greg |
2.10 |
linelen += *sp++ = 255; |
167 |
greg |
2.3 |
return(linelen); |
168 |
|
|
} |
169 |
|
|
|
170 |
|
|
|
171 |
|
|
int |
172 |
greg |
2.2 |
squeeztext(sp, tp, f, cis) /* squeeze text line */ |
173 |
|
|
short *sp; /* returned character spacing */ |
174 |
|
|
char *tp; /* text line */ |
175 |
|
|
FONT *f; /* font */ |
176 |
|
|
int cis; /* intercharacter spacing */ |
177 |
|
|
{ |
178 |
|
|
int linelen; |
179 |
greg |
2.5 |
register GLYPH *gp; |
180 |
greg |
2.2 |
|
181 |
greg |
2.8 |
linelen = 0; |
182 |
greg |
2.2 |
gp = NULL; |
183 |
|
|
while (*tp && (gp = f->fg[*tp++&0xff]) == NULL) |
184 |
|
|
*sp++ = 0; |
185 |
|
|
cis /= 2; |
186 |
greg |
2.8 |
*sp = cis; |
187 |
greg |
2.2 |
while (gp != NULL) { |
188 |
|
|
if (gp->nverts) { /* regular character */ |
189 |
|
|
linelen += *sp++ += cis - gp->left; |
190 |
|
|
*sp = gp->right + cis; |
191 |
|
|
} else { /* space */ |
192 |
|
|
linelen += *sp++; |
193 |
greg |
2.3 |
*sp = f->mwidth; |
194 |
greg |
2.2 |
} |
195 |
|
|
gp = NULL; |
196 |
|
|
while (*tp && (gp = f->fg[*tp++&0xff]) == NULL) { |
197 |
|
|
linelen += *sp++; |
198 |
|
|
*sp = 0; |
199 |
|
|
} |
200 |
|
|
} |
201 |
greg |
2.3 |
linelen += *sp += cis; |
202 |
greg |
2.2 |
return(linelen); |
203 |
|
|
} |
204 |
|
|
|
205 |
|
|
|
206 |
greg |
2.3 |
int |
207 |
greg |
2.2 |
proptext(sp, tp, f, cis, nsi) /* space line proportionally */ |
208 |
|
|
short *sp; /* returned character spacing */ |
209 |
|
|
char *tp; /* text line */ |
210 |
|
|
FONT *f; /* font */ |
211 |
|
|
int cis; /* target intercharacter spacing */ |
212 |
|
|
int nsi; /* minimum number of spaces for indent */ |
213 |
|
|
{ |
214 |
schorsch |
2.17 |
register char *end, *tab = NULL; |
215 |
greg |
2.3 |
GLYPH *gp; |
216 |
|
|
short *nsp; |
217 |
|
|
int alen, len, width; |
218 |
|
|
/* start by squeezing it */ |
219 |
|
|
squeeztext(sp, tp, f, cis); |
220 |
|
|
/* now, realign spacing */ |
221 |
greg |
2.7 |
width = *sp++; |
222 |
greg |
2.3 |
while (*tp) { |
223 |
greg |
2.7 |
len = alen = 0; |
224 |
greg |
2.3 |
nsp = sp; |
225 |
|
|
for (end = tp; *end; end = tab) { |
226 |
|
|
tab = end + 1; |
227 |
|
|
alen += *nsp++; |
228 |
|
|
if (f->fg[*end&0xff]) { |
229 |
|
|
while ((gp = f->fg[*tab&0xff]) != NULL && |
230 |
|
|
gp->nverts == 0) { /* tab in */ |
231 |
|
|
alen += *nsp++; |
232 |
|
|
tab++; |
233 |
|
|
} |
234 |
|
|
len += tab - end; |
235 |
|
|
} |
236 |
greg |
2.4 |
if (nsi && tab - end > nsi) |
237 |
greg |
2.3 |
break; |
238 |
|
|
} |
239 |
|
|
len *= f->mwidth + cis; /* compute target length */ |
240 |
|
|
width += len; |
241 |
|
|
len -= alen; /* necessary adjustment */ |
242 |
|
|
while (sp < nsp) { |
243 |
|
|
alen = len/(nsp-sp); |
244 |
|
|
*sp++ += alen; |
245 |
|
|
len -= alen; |
246 |
|
|
} |
247 |
|
|
tp = tab; |
248 |
|
|
} |
249 |
|
|
return(width); |
250 |
greg |
2.2 |
} |