summaryrefslogtreecommitdiff
path: root/Build/source/texk/dvipsk/tfmload.c
blob: 6bd2febb089024a139a7ed01079985f44d793498 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
/*
 *   Loads a tfm file.  It marks the characters as undefined.
 */
#include "dvips.h" /* The copyright notice in that file is included too! */
#ifdef KPATHSEA
#include <kpathsea/c-pathmx.h>
#include <kpathsea/concatn.h>
#endif
/*
 *   The external declarations:
 */
#include "protos.h"

FILE *tfmfile ; 

/*
 *   Our static variables:
 */
static char name[50] ;

void
badtfm(const char *s)
{
   char *msg = concatn ("! Bad TFM file ", name, ": ", s);
   error(msg);
}

/*
 *   Tries to open a tfm file.  Uses cmr10.tfm if unsuccessful,
 *   and complains loudly about it.
 */
void
tfmopen(register fontdesctype *fd)
{
  register char *n;
#ifdef KPATHSEA
  kpse_file_format_type d ;
#else
   register char *d;
#endif
   n = fd->name ;
   if (!noomega) {
#ifdef KPATHSEA
      d = ofmpath;
#else
      d = fd->area ;
      if (*d==0)
        d = ofmpath ;
#endif
#ifdef MVSXA   /* IBM: MVS/XA */
      (void)sprintf(name, "ofm(%s)", n) ;
#else
      (void)sprintf(name, "%s.ofm", n) ;
#endif
      if ((tfmfile=search(d, name, READBIN))!=NULL)
         return ;
   }
#ifdef KPATHSEA
   d = tfmpath;
#else
   d = fd->area ;
   if (*d==0)
     d = tfmpath ;
#endif
#ifdef MVSXA   /* IBM: MVS/XA */
   (void)sprintf(name, "tfm(%s)", n) ;
#else
   (void)sprintf(name, "%s.tfm", n) ;
#endif
   if ((tfmfile=search(d, name, READBIN))!=NULL)
      return ;
   (void)sprintf(errbuf, "Can't open font metric file %s%s",
          fd->area, name) ;
   error(errbuf) ;
   error("I will use cmr10.tfm instead, so expect bad output.") ;
#ifdef MVSXA   /* IBM: MVS/XA */
   if ((tfmfile=search(d, "tfm(cmr10)", READBIN))!=NULL)
#else
   if ((tfmfile=search(d, "cmr10.tfm", READBIN))!=NULL)
#endif
      return ;
   error("! I can't find cmr10.tfm; please reinstall me with proper paths") ;
}

shalfword
tfmbyte(void)
{
  return(getc(tfmfile)) ;
}

halfword
tfm16(void)
{
  register halfword a ; 
  a = tfmbyte () ; 
  return ( a * 256 + tfmbyte () ) ; 
} 

integer
tfm32(void)
{
  register integer a ; 
  a = tfm16 () ; 
  if (a > 32767) a -= 65536 ;
  return ( a * 65536 + tfm16 () ) ; 
} 

int
tfmload(register fontdesctype *curfnt)
{
   register integer i, j ;
   register integer li, cd=0 ;
   integer scaledsize ;
   integer nw, hd ;
   integer bc, ec ;
   integer nco=0, ncw=0, npc=0, no_repeats = 0 ;
   integer *scaled ;
   integer *chardat ;
   int font_level ;
   integer pretend_no_chars ;
   int charcount = 0 ;

   tfmopen(curfnt) ;
/*
 *   Next, we read the font data from the tfm file, and store it in
 *   our own arrays.
 */
   li = tfm16() ;
   if (li!=0) {
      font_level = -1 ;
      hd = tfm16() ;
      bc = tfm16() ; ec = tfm16() ;
      nw = tfm16() ;
      li = tfm32() ; li = tfm32() ; li = tfm32() ; li = tfm16() ;
      if (hd<2 || bc>ec+1 || ec>255 || nw>256)
         badtfm("header") ;
   } else {  /* In an .ofm file */
      if (noomega) badtfm("length") ;
      font_level = tfm16();
      li = tfm32() ; hd = tfm32() ;
      bc = tfm32() ; ec = tfm32() ;
      nw = tfm32() ;
      for (i=0; i<8; i++) li=tfm32();
      if (font_level>1 || hd<2 || bc<0 || ec<0 || nw<0
                       || bc>ec+1 || ec>65535 || nw>65536)
         badtfm("header") ;
      if (font_level==1) {
         nco = tfm32() ;
         ncw = tfm32() ;
         npc = tfm32() ;
         for (i=0; i<12; i++) li=tfm32();
      }
   }
   li = tfm32() ;
   check_checksum (li, curfnt->checksum, curfnt->name);
   li = (integer)(alpha * (real)tfm32()) ;
   if (li > curfnt->designsize + fsizetol
       || li < curfnt->designsize - fsizetol) {
      char *msg = concat ("Design size mismatch in font ", curfnt->name);
      error(msg);
   }
   pretend_no_chars=ec+1 ;
   if (pretend_no_chars<256) pretend_no_chars=256 ;
   else {
      curfnt->chardesc = (chardesctype *)
         xrealloc(curfnt->chardesc, sizeof(chardesctype)*pretend_no_chars) ;
      curfnt->maxchars = pretend_no_chars ;
   }
   for (i=2; i<((font_level==1)?nco-29:hd); i++)
      li = tfm32() ;
   chardat = (integer *) xmalloc(pretend_no_chars*sizeof(integer)) ;
   for (i=0; i<pretend_no_chars; i++)
      chardat[i] = -1 ;
   for (i=bc; i<=ec; i++) {
      if (no_repeats>0) {
         no_repeats-- ;
      } else if (font_level>=0) {
         cd = tfm16() ;
         li = tfm32() ;
         li = tfm16() ;
         if (font_level==1) {
            no_repeats = tfm16() ;
            for (j=0; j<(npc|1); j++) tfm16() ;
            ncw -= 3 + npc/2 ;
         }
      } else {
         cd = tfmbyte() ;
         li = tfm16() ;
         li = tfmbyte() ;
      }
      if (cd>=nw) badtfm("char info") ;
      if (cd) {
         chardat[i] = cd ;
         charcount++ ;
      }
   }
   if (font_level==1&&ncw!=0) {
      char *msg = ("Table size mismatch in ", curfnt->name);
      error(errbuf);
   }
   scaledsize = curfnt->scaledsize ;
   scaled = (integer *) xmalloc(nw*sizeof(integer)) ;
   for (i=0; i<nw; i++)
      scaled[i] = scalewidth(tfm32(), scaledsize) ;
   (void)fclose(tfmfile) ;
   for (i=0; i<pretend_no_chars; i++)
      if (chardat[i]!= -1) {
         li = scaled[chardat[i]] ;
         curfnt->chardesc[i].TFMwidth = li ;
         if (li >= 0)
            curfnt->chardesc[i].pixelwidth = ((integer)(conv*li+0.5)) ;
         else
            curfnt->chardesc[i].pixelwidth = -((integer)(conv*-li+0.5)) ;
         curfnt->chardesc[i].flags = (curfnt->resfont ? EXISTS : 0) ;
         curfnt->chardesc[i].flags2 = EXISTS ;
      } else curfnt->chardesc[i].flags = curfnt->chardesc[i].flags2 = 0 ;
   free(chardat) ;
   free(scaled) ;
   if (ec>=256) curfnt->codewidth = 2 ; /* XXX: 2byte-code can have ec<256 */
   curfnt->loaded = 1 ;
   return charcount ;
}