summaryrefslogtreecommitdiff
path: root/Build/source/texk/dvipdfm-x/tt_post.c
blob: 737d4cd00d45ad71fb3fc434e91508f1032ddb86 (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
/* This is dvipdfmx, an eXtended version of dvipdfm by Mark A. Wicks.

    Copyright (C) 2002-2020 by Jin-Hwan Cho and Shunsaku Hirata,
    the dvipdfmx project team.
    
    This program is free software; you can redistribute it and/or modify
    it under the terms of the GNU General Public License as published by
    the Free Software Foundation; either version 2 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 General Public License for more details.
    
    You should have received a copy of the GNU General Public License
    along with this program; if not, write to the Free Software
    Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA.
*/

#ifdef HAVE_CONFIG_H
#include <config.h>
#endif

#include "system.h"
#include "error.h"
#include "mem.h"

#include "dpxfile.h"

#include "sfnt.h"

#include "tt_post.h"

static const char *macglyphorder[258];

/* offset from begenning of the post table */
#define NAME_STR_OFFSET  32

static int
read_v2_post_names (struct tt_post_table *post, sfnt *sfont)
{
  USHORT i, idx, *indices, maxidx;
  int    len;

  post->numberOfGlyphs = sfnt_get_ushort(sfont);

  indices     = NEW(post->numberOfGlyphs, USHORT);
  maxidx = 257;
  for (i = 0; i < post->numberOfGlyphs; i++) {
    idx = sfnt_get_ushort(sfont);
    if (idx >= 258) {
      if (idx > maxidx)
        maxidx = idx;
#if 0
  /*
   * Apple's TrueType spec. describes as,
   *
   *   Index numbers 32768 through 65535 are reserved for future use.
   *   If you do not want to associate a PostScript name with a particular
   *   glyph, use index number 0 which points to the name .notdef.
   *
   *   -- https://developer.apple.com/fonts/TrueType-Reference-Manual/RM06/Chap6post.html
   *
   * But there are no restriction in Microsoft's OpenType spec.
   */

      if (idx > 32767) {
        /* Although this is strictly speaking out of spec, it seems to work
         * and there are real-life fonts that use it.
         * We show a warning only once, instead of thousands of times
         */
        static char warning_issued = 0;
        if (!warning_issued) {
          WARN("TrueType post table name index %u > 32767", idx);
          warning_issued = 1;
        }
        /* In a real-life large font, (x)dvipdfmx crashes if we use
         * nonvanishing idx in the case of idx > 32767.
         * If we set idx = 0, (x)dvipdfmx works fine for the font and
         * created pdf seems fine. The post table may not be important
         * in such a case
         */
        idx = 0;
      }
#endif
    }
    indices[i] = idx;
  }

  post->count = maxidx - 257;
  if (post->count < 1) {
    post->names = NULL;
  } else {
    post->names = NEW(post->count, char *);
    for (i = 0; i < post->count; i++) { /* read Pascal strings */
      len = sfnt_get_byte(sfont);
      if (len > 0) {
        post->names[i] = NEW(len + 1, char);
        sfnt_read(post->names[i], len, sfont);
        post->names[i][len] = 0;
      } else {
        post->names[i] = NULL;
      }
    }
  }

  post->glyphNamePtr = NEW(post->numberOfGlyphs, const char *);
  for (i = 0; i < post->numberOfGlyphs; i++) {
    idx = indices[i];
    if (idx < 258) {
      post->glyphNamePtr[i] = macglyphorder[idx];
    } else if (idx - 258 < post->count) {
      post->glyphNamePtr[i] = post->names[idx - 258];
    } else {
      WARN("Invalid glyph name index number: %u (>= %u)",
	   idx, post->count + 258);
      RELEASE(indices);
      return -1;
    }
  }
  RELEASE(indices);

  return 0;
}

struct tt_post_table *
tt_read_post_table (sfnt *sfont)
{
  struct tt_post_table *post;

  /* offset = */ sfnt_locate_table(sfont, "post");

  post   = NEW(1, struct tt_post_table);

  post->Version            = sfnt_get_ulong(sfont); /* Fixed */
  post->italicAngle        = sfnt_get_ulong(sfont); /* Fixed */
  post->underlinePosition  = sfnt_get_short(sfont); /* FWord */
  post->underlineThickness = sfnt_get_short(sfont); /* FWord */
  post->isFixedPitch       = sfnt_get_ulong(sfont);
  post->minMemType42       = sfnt_get_ulong(sfont);
  post->maxMemType42       = sfnt_get_ulong(sfont);
  post->minMemType1        = sfnt_get_ulong(sfont);
  post->maxMemType1        = sfnt_get_ulong(sfont);

  post->numberOfGlyphs    = 0;
  post->glyphNamePtr      = NULL;
  post->count             = 0;
  post->names             = NULL;

  if (post->Version == 0x00010000UL) {
    post->numberOfGlyphs  = 258; /* wrong */
    post->glyphNamePtr    = macglyphorder;
  } else if (post->Version == 0x00028000UL) {
    WARN("TrueType 'post' version 2.5 found (deprecated)");
  } else if (post->Version == 0x00020000UL) {
    if (read_v2_post_names(post, sfont) < 0) {
      WARN("Invalid version 2.0 'post' table");
      tt_release_post_table(post);
      post = NULL;
    }
  } else if (post->Version == 0x00030000UL || /* no glyph names provided */
             post->Version == 0x00040000UL) { /* Apple format for printer-based fonts */
    /* don't bother constructing char names, not sure if they'll ever be needed */
  } else { /* some broken font files have 0x00000000UL and perhaps other values */
    WARN("Unknown 'post' version: %08X, assuming version 3.0", post->Version);
  }

  return post;
}

USHORT
tt_lookup_post_table (struct tt_post_table *post, const char *glyphname)
{
  USHORT  gid;

  ASSERT(post && glyphname);

  for (gid = 0; gid < post->numberOfGlyphs; gid++) {
    if (post->glyphNamePtr[gid] &&
        !strcmp(glyphname, post->glyphNamePtr[gid])) {
      return  gid;
    }
  }

  return 0;
}

char*
tt_get_glyphname (struct tt_post_table *post, USHORT gid)
{
  if (gid < post->numberOfGlyphs && post->glyphNamePtr[gid])
    return xstrdup(post->glyphNamePtr[gid]);
  return NULL;
}

void
tt_release_post_table (struct tt_post_table *post)
{
  USHORT i;

  ASSERT(post);

  if (post->glyphNamePtr && post->Version != 0x00010000UL)
    RELEASE((void *)post->glyphNamePtr);
  if (post->names) {
    for (i = 0; i < post->count; i++) {
      if (post->names[i])
        RELEASE(post->names[i]);
    }
    RELEASE(post->names);
  }
  post->count        = 0;
  post->glyphNamePtr = NULL;
  post->names        = NULL;

  RELEASE(post);

  return;
}

/* Macintosh glyph order - from apple's TTRefMan */
static const char *
macglyphorder[258] = {
  /* 0x0000 */
  ".notdef", ".null", "nonmarkingreturn", "space", "exclam", "quotedbl",
  "numbersign", "dollar", "percent", "ampersand", "quotesingle",
  "parenleft", "parenright", "asterisk", "plus", "comma",
  /* 0x0010 */
  "hyphen", "period", "slash", "zero", "one", "two", "three", "four",
  "five", "six", "seven", "eight", "nine", "colon", "semicolon", "less",
  /* 0x0020 */
  "equal", "greater", "question", "at", "A", "B", "C", "D",
  "E", "F", "G", "H", "I", "J", "K", "L",
  /* 0x0030 */
  "M", "N", "O", "P", "Q", "R", "S", "T", "U", "V", "W", "X",
  "Y", "Z", "bracketleft", "backslash",
  /* 0x0040 */
  "bracketright", "asciicircum", "underscore", "grave",
  "a", "b", "c", "d", "e", "f", "g", "h", "i", "j", "k", "l",
  /* 0x0050 */
  "m", "n", "o", "p", "q", "r", "s", "t", "u", "v", "w", "x",
  "y", "z", "braceleft", "bar",
  /* 0x0060 */
  "braceright", "asciitilde", "Adieresis", "Aring", "Ccedilla",
  "Eacute", "Ntilde", "Odieresis", "Udieresis", "aacute", "agrave",
  "acircumflex", "adieresis", "atilde", "aring", "ccedilla",
  /* 0x0070 */
  "eacute", "egrave", "ecircumflex", "edieresis", "iacute", "igrave",
  "icircumflex", "idieresis", "ntilde", "oacute", "ograve", "ocircumflex",
  "odieresis", "otilde", "uacute", "ugrave",
  /* 0x0080 */
  "ucircumflex", "udieresis", "dagger", "degree", "cent", "sterling",
  "section", "bullet", "paragraph", "germandbls", "registered",
  "copyright", "trademark", "acute", "dieresis", "notequal",
  /* 0x0090 */
  "AE", "Oslash", "infinity", "plusminus", "lessequal",	"greaterequal",
  "yen", "mu", "partialdiff", "summation", "product", "pi", "integral",
  "ordfeminine", "ordmasculine", "Omega",
  /* 0x00a0 */
  "ae", "oslash", "questiondown", "exclamdown", "logicalnot", "radical",
  "florin", "approxequal", "Delta", "guillemotleft", "guillemotright",
  "ellipsis", "nonbreakingspace", "Agrave", "Atilde", "Otilde",
  /* 0x00b0 */
  "OE", "oe", "endash", "emdash", "quotedblleft", "quotedblright",
  "quoteleft", "quoteright", "divide", "lozenge", "ydieresis",
  "Ydieresis", "fraction", "currency", "guilsinglleft", "guilsinglright",
  /* 0x00c0 */
  "fi", "fl", "daggerdbl", "periodcentered", "quotesinglbase",
  "quotedblbase", "perthousand", "Acircumflex",	 "Ecircumflex", "Aacute",
  "Edieresis", "Egrave", "Iacute", "Icircumflex", "Idieresis", "Igrave",
  /* 0x00d0 */
  "Oacute", "Ocircumflex", "apple", "Ograve", "Uacute", "Ucircumflex",
  "Ugrave", "dotlessi", "circumflex", "tilde", "macron", "breve",
  "dotaccent", "ring", "cedilla", "hungarumlaut",
  /* 0x00e0 */
  "ogonek", "caron", "Lslash", "lslash", "Scaron", "scaron", "Zcaron",
  "zcaron", "brokenbar", "Eth", "eth", "Yacute", "yacute", "Thorn",
  "thorn", "minus",
  /* 0x00f0 */
  "multiply", "onesuperior", "twosuperior", "threesuperior", "onehalf",
  "onequarter", "threequarters", "franc", "Gbreve", "gbreve", "Idotaccent",
  "Scedilla", "scedilla", "Cacute", "cacute", "Ccaron",
  /* 0x0100 */
  "ccaron", "dcroat"
};