summaryrefslogtreecommitdiff
path: root/dviware/dvipng/fontmap.c
blob: f362a57defa4740033f47266977cbe857ceca713 (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
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
/* fontmap.c */

/************************************************************************

  Part of the dvipng distribution

  This program is free software: you can redistribute it and/or modify
  it under the terms of the GNU Lesser General Public License as
  published by the Free Software Foundation, either version 3 of the
  License, or (at your option) any later version.

  This program is distributed in the hope that it will be useful, but
  WITHOUT ANY WARRANTY; without even the implied warranty of
  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
  Lesser General Public License for more details.

  You should have received a copy of the GNU Lesser General Public
  License along with this program. If not, see
  <http://www.gnu.org/licenses/>.

  Copyright (C) 2002-2015 Jan-Åke Larsson

************************************************************************/

#include "dvipng.h"

static struct filemmap psfont_mmap;
#ifdef HAVE_FT2
static struct filemmap ttfont_mmap;
#endif
static struct psfontmap *psfontmap=NULL;

static char* newword(char** buffer, char* end)
{
  char *word,*pos=*buffer;

  while(pos<end && *pos!=' ' && *pos!='\t' && *pos!='"') pos++;
  if ((word=malloc(pos-*buffer+1))==NULL)
    Fatal("cannot malloc space for string");
  strncpy(word,*buffer,pos-*buffer);
  word[pos-*buffer]='\0';
  *buffer=pos;
  return(word);
}

char* copyword(char* orig)
{
  char *word;

  if (orig==NULL)
    return(NULL);
  if ((word=malloc(strlen(orig)+1))==NULL)
    Fatal("cannot malloc space for string");
  strcpy(word,orig);
  return(word);
}

static char* find_format(const char* name)
{
  /* Cater for both new (first case) and old (second case) kpathsea */
  char* format =
    kpse_find_file(name,kpse_fontmap_format,false);

  if (format==NULL)
    format = kpse_find_file(name,kpse_dvips_config_format,false);
  return(format);
}

void InitPSFontMap(void)
{
  char* psfont_name=NULL;
  /* Prefer ps2pk.map, fonts are present more often */
  psfont_name=find_format("ps2pk.map");
  if (psfont_name==NULL)
    psfont_name=find_format("psfonts.map");
  if (psfont_name==NULL) {
    Warning("cannot find ps2pk.map, nor psfonts.map");
  } else {
    DEBUG_PRINT(DEBUG_FT,
		("\n  OPEN PSFONT MAP:\t'%s'", psfont_name));
    if (MmapFile(psfont_name,&psfont_mmap)) {
      Warning("psfonts map %s could not be opened", psfont_name);
    }
    free(psfont_name);
  }
#ifdef HAVE_FT2
  psfont_name=find_format("ttfonts.map");
  if (psfont_name!=NULL) {
    DEBUG_PRINT(DEBUG_FT,("\n  OPEN TTFONT MAP:\t'%s'", psfont_name));
    if (MmapFile(psfont_name,&ttfont_mmap)) {
      Warning("ttfonts map %s could not be opened", psfont_name);
    }
    free(psfont_name);
  }
#endif
}

struct psfontmap *NewPSFont(struct psfontmap* copyfrom)
{
  struct psfontmap *newentry=NULL;
  if ((newentry=malloc(sizeof(struct psfontmap)))==NULL)
    Fatal("cannot malloc psfontmap space");
  if (copyfrom!=NULL) {
    newentry->line = copyfrom->line;
    newentry->tfmname = copyword(copyfrom->tfmname);
    newentry->psfile = copyword(copyfrom->psfile);
    newentry->encname = copyword(copyfrom->encname);
    newentry->encoding = copyfrom->encoding;
#ifdef HAVE_FT2
    newentry->ft_transformp = copyfrom->ft_transformp;
    newentry->subfont = copyfrom->subfont;
#endif
    newentry->end = copyfrom->end;
  } else {
    newentry->line = NULL;
    newentry->tfmname = NULL;
    newentry->psfile = NULL;
    newentry->encname = NULL;
    newentry->encoding = NULL;
#ifdef HAVE_FT2
    newentry->ft_transformp = NULL;
    newentry->subfont = NULL;
#endif
    newentry->end = NULL;
  }
  newentry->next=psfontmap;
  psfontmap=newentry;
  return(newentry);
}

static struct psfontmap *SearchPSFontMap(char* fontname,
					 struct filemmap* search_mmap)
{
  static char *pos=NULL,*end=NULL;
  static struct filemmap* searching_mmap=NULL;
  struct psfontmap *entry=NULL;

  if (pos==end && search_mmap!=searching_mmap) {
    searching_mmap=search_mmap;
    pos=searching_mmap->data;
    end=searching_mmap->data+searching_mmap->size;
  }
  while(pos<end && (entry==NULL || strcmp(entry->tfmname,fontname)!=0)) {
    while(pos < end
	  && (*pos=='\r' || *pos=='\n' || *pos==' ' || *pos=='\t'
	      || *pos=='%' || *pos=='*' || *pos==';' || *pos=='#')) {
      while(pos < end && *pos!='\r' && *pos!='\n') pos++; /* skip comments/empty rows */
      pos++;
    }
    if (pos < end) {
      entry=NewPSFont(NULL);
      entry->line = pos;
      /* skip <something and quoted entries */
      while(pos < end && (*pos=='<' || *pos=='"')) {
	if (*pos=='<')
	  while(pos < end && *pos!=' ' && *pos!='\t') pos++;
	else
	  while(pos < end && *pos!='"') pos++;
	while(pos < end && (*pos==' ' || *pos=='\t')) pos++;
      }
      /* first word is font name */
      entry->tfmname = newword(&pos,end);
      while(pos < end && *pos!='\r' && *pos!='\n') pos++;
      entry->end = pos;
    }
    pos++;
  }
  if (entry!=NULL && strcmp(entry->tfmname,fontname)!=0)
    entry=NULL;
  return(entry);
}

void ClearPSFontMap(void)
{
  struct psfontmap *entry;

  while(psfontmap!=NULL) {
    entry=psfontmap;
    psfontmap=psfontmap->next;
    free(entry->tfmname);
    if (entry->psfile!=NULL)
      free(entry->psfile);
    if (entry->encname!=NULL)
      free(entry->encname);
    free(entry);
  }
  UnMmapFile(&psfont_mmap);
#ifdef HAVE_FT2
  UnMmapFile(&ttfont_mmap);
#endif
}

static void ReadPSFontMap(struct psfontmap *entry)
{
  char *pos,*end,*psname;
  int nameno = 0;

  DEBUG_PRINT(DEBUG_FT,("\n  PSFONTMAP: %s ",entry->tfmname));
  pos=entry->line;
  end=entry->end;
  while(pos < end) {
    if (*pos=='<') {                               /* filename follows */
      pos++;
      if (pos<end && *pos=='<') {           /* <<download.font */
	pos++;
	entry->psfile = newword((char**)&pos,end);
	DEBUG_PRINT(DEBUG_FT,("<%s ",entry->psfile));
      } else if (pos<end && *pos=='[') {    /* <[encoding.file */
	pos++;
	entry->encname = newword((char**)&pos,end);
	DEBUG_PRINT(DEBUG_FT,("<[%s ",entry->encname));
      } else {                                     /* <some.file      */
	char* word =newword((char**)&pos,end);
	if (strncmp(word+strlen(word)-4,".enc",4)==0) {/* <some.enc */
	  entry->encname=word;
	  DEBUG_PRINT(DEBUG_FT,("<[%s ",entry->encname));
	} else {                                   /* <font    */
	  entry->psfile=word;
	  DEBUG_PRINT(DEBUG_FT,("<%s ",entry->psfile));
	}
      }
    } else if (*pos=='"') { /* PS code: reencoding/tranformation exists */
      char *word;
      double cxx=1.0,cxy=0.0;
      pos++;
      DEBUG_PRINT(DEBUG_FT,("\""));
      while(pos < end && *pos!='"') {
	word=newword((char**)&pos,end);
	while(pos < end && (*pos==' ' || *pos=='\t')) pos++;
	if (pos+10<end && strncmp(pos,"ExtendFont",10)==0) {
	  cxx=strtod(word,NULL);
	  pos+=10;
	  DEBUG_PRINT(DEBUG_FT,("%f ExtendFont ",cxx));
	} else if (pos+9<end && strncmp(pos,"SlantFont",9)==0) {
	  pos+=9;
	  cxy=strtod(word,NULL);
	  DEBUG_PRINT(DEBUG_FT,("%f SlantFont ",cxy));
	} else if (pos+12<end && strncmp(pos,"ReEncodeFont",12)==0) {
	    pos+=12;
	    DEBUG_PRINT(DEBUG_FT,("%s ReEncodeFont ",word));
	} else {
	    DEBUG_PRINT(DEBUG_FT,("(?:%s) ",word));
	}
	free(word);
      }
#ifdef HAVE_FT2
      entry->ft_transformp=&(entry->ft_transform);
      entry->ft_transform.xx=(FT_Fixed)(cxx*0x10000);
      entry->ft_transform.xy=(FT_Fixed)(cxy*0x10000);
      entry->ft_transform.yx=0;
      entry->ft_transform.yy=0x10000;
#endif
      DEBUG_PRINT(DEBUG_FT,("\" "));
      pos++;
    } else {                                      /* bare word */
      switch (++nameno) {
      case 1: /* first word is tfmname and perhaps psname, NOT psfile */
	while(pos<end && *pos!=' ' && *pos!='\t') pos++;
	psname=entry->tfmname;
	break;
      case 2:                    /* second word is psname, NOT psfile */
	psname = newword((char**)&pos,end);
	DEBUG_PRINT(DEBUG_FT,("(%s) ",psname));
	free(psname);
	break;
      case 3:                             /* third word is encoding */
	entry->encname = newword((char**)&pos,end);
	DEBUG_PRINT(DEBUG_FT,("<[%s ",entry->encname));
	break;
      default:
	while(pos<end && *pos!=' ' && *pos!='\t') pos++;
	Warning("more than three bare words in font map entry");
      }
    }
    while(pos < end && (*pos==' ' || *pos=='\t')) pos++;
  }
  if (entry->psfile==NULL) {
    /* No psfile-name given, use tfmname */
    entry->psfile=copyword(entry->tfmname);
    DEBUG_PRINT(DEBUG_FT,(" <%s ",entry->psfile));
  }
  if (entry->encname!=NULL
      && (entry->encoding=FindEncoding(entry->encname))==NULL)
    Warning("unable to load font encoding '%s' for %s",
	    entry->encname,entry->tfmname);
}


struct psfontmap* FindPSFontMap(char* fontname)
{
  struct psfontmap *entry;
  static struct filemmap* search_mmap_p=&psfont_mmap;

  entry=psfontmap;
  while(entry!=NULL && strcmp(entry->tfmname,fontname)!=0)
    entry=entry->next;
  if(entry==NULL) {
    entry=SearchPSFontMap(fontname,search_mmap_p);
#ifdef HAVE_FT2
    if(entry==NULL && search_mmap_p!=&ttfont_mmap) {
      search_mmap_p=&ttfont_mmap;
      entry=SearchPSFontMap(fontname,search_mmap_p);
    }
  }
  if(entry==NULL) {
    struct psfontmap* entry_subfont=NULL;
    entry=psfontmap;
    while(entry!=NULL && strcmp(entry->tfmname,fontname)!=0) {
      while(entry!=NULL && strchr(entry->tfmname,'@')==NULL)
	entry=entry->next;
      if (entry!=NULL) {
	entry_subfont=FindSubFont(entry,fontname);
	if (entry_subfont!=NULL)
	  entry=entry_subfont;
	else
	  entry=entry->next;
      }
    }
#endif
  }
  if (entry!=NULL && entry->psfile==NULL)
    ReadPSFontMap(entry);
  if (entry!=NULL && entry->encname!=NULL && entry->encoding==NULL)
    /* Encoding given but it cannot be found. Unusable font */
    return(NULL);
  return(entry);
}