| 1 |
/* Copyright (c) 1992 Regents of the University of California */ |
| 2 |
|
| 3 |
#ifndef lint |
| 4 |
static char SCCSid[] = "$SunId$ LBL"; |
| 5 |
#endif |
| 6 |
|
| 7 |
/* |
| 8 |
* Polygonal font handling routines |
| 9 |
*/ |
| 10 |
|
| 11 |
#include "standard.h" |
| 12 |
|
| 13 |
#include "font.h" |
| 14 |
|
| 15 |
#define galloc(nv) (GLYPH *)malloc(sizeof(GLYPH)+2*sizeof(GORD)*(nv)) |
| 16 |
|
| 17 |
|
| 18 |
extern char *libpath; /* list of library directories */ |
| 19 |
|
| 20 |
static FONT *fontlist = NULL; /* list of loaded fonts */ |
| 21 |
|
| 22 |
|
| 23 |
FONT * |
| 24 |
getfont(fname) /* return font fname */ |
| 25 |
char *fname; |
| 26 |
{ |
| 27 |
char buf[16]; |
| 28 |
FILE *fp; |
| 29 |
char *pathname, *err; |
| 30 |
int gn, ngv; |
| 31 |
register int gv; |
| 32 |
register GLYPH *g; |
| 33 |
GORD *gp; |
| 34 |
register FONT *f; |
| 35 |
|
| 36 |
for (f = fontlist; f != NULL; f = f->next) |
| 37 |
if (!strcmp(f->name, fname)) |
| 38 |
return(f); |
| 39 |
/* load the font file */ |
| 40 |
if ((pathname = getpath(fname, libpath, R_OK)) == NULL) { |
| 41 |
sprintf(errmsg, "cannot find font file \"%s\"", fname); |
| 42 |
error(USER, errmsg); |
| 43 |
} |
| 44 |
f = (FONT *)calloc(1, sizeof(FONT)); |
| 45 |
if (f == NULL) |
| 46 |
goto memerr; |
| 47 |
f->name = savestr(fname); |
| 48 |
if ((fp = fopen(pathname, "r")) == NULL) { |
| 49 |
sprintf(errmsg, "cannot open font file \"%s\"", |
| 50 |
pathname); |
| 51 |
error(SYSTEM, errmsg); |
| 52 |
} |
| 53 |
while (fgetword(buf,sizeof(buf),fp) != NULL) { /* get each glyph */ |
| 54 |
if (!isint(buf)) |
| 55 |
goto nonint; |
| 56 |
gn = atoi(buf); |
| 57 |
if (gn < 0 || gn > 255) { |
| 58 |
err = "illegal"; |
| 59 |
goto fonterr; |
| 60 |
} |
| 61 |
if (f->fg[gn] != NULL) { |
| 62 |
err = "duplicate"; |
| 63 |
goto fonterr; |
| 64 |
} |
| 65 |
if (fgetword(buf,sizeof(buf),fp) == NULL || !isint(buf) || |
| 66 |
(ngv = atoi(buf)) < 0 || ngv > 32000) { |
| 67 |
err = "bad # vertices for"; |
| 68 |
goto fonterr; |
| 69 |
} |
| 70 |
g = galloc(ngv); |
| 71 |
if (g == NULL) |
| 72 |
goto memerr; |
| 73 |
g->nverts = ngv; |
| 74 |
g->start = g->width = 128; |
| 75 |
ngv *= 2; |
| 76 |
gp = gvlist(g); |
| 77 |
while (ngv--) { |
| 78 |
if (fgetword(buf,sizeof(buf),fp) == NULL || |
| 79 |
!isint(buf) || |
| 80 |
(gv = atoi(buf)) < 0 || gv > 255) { |
| 81 |
err = "bad vertex for"; |
| 82 |
goto fonterr; |
| 83 |
} |
| 84 |
*gp++ = gv; |
| 85 |
if (ngv & 1) /* follow x limits */ |
| 86 |
if (gv < g->start) |
| 87 |
g->start = gv; |
| 88 |
else if (gv > g->width) |
| 89 |
g->width = gv; |
| 90 |
} |
| 91 |
g->width -= g->start; |
| 92 |
f->fg[gn] = g; |
| 93 |
} |
| 94 |
fclose(fp); |
| 95 |
f->next = fontlist; |
| 96 |
return(fontlist = f); |
| 97 |
nonint: |
| 98 |
sprintf(errmsg, "non-integer in font file \"%s\"", pathname); |
| 99 |
error(USER, errmsg); |
| 100 |
fonterr: |
| 101 |
sprintf(errmsg, "%s character (%d) in font file \"%s\"", |
| 102 |
err, gn, pathname); |
| 103 |
error(USER, errmsg); |
| 104 |
memerr: |
| 105 |
error(SYSTEM, "out of memory in fontglyph"); |
| 106 |
} |
