summaryrefslogtreecommitdiff
path: root/Build/source/texk/dvipng/dvipng-1.14/font.c
blob: 2a8b59b9723d923c3207618a924d173de4340b17 (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
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
/* font.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) 2002-2010 Jan-Åke Larsson

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

#include "dvipng.h"

void CheckChecksum(uint32_t c1, uint32_t c2, const char* name)
{
  /* Report a warning if both checksums are nonzero, they don't match,
     and the user hasn't turned it off.  */
  if (c1 && c2 && c1 != c2
#ifdef HAVE_LIBKPATHSEA
      && !kpse_tex_hush ("checksum")
#endif
      ) {
     Warning ("checksum mismatch in %s", name) ;
   }
}


static double ActualFactor(uint32_t unmodsize)
/* compute the actual size factor given the approximation */
/* actually factor * 1000 */
{
  double  realsize;     /* the actual magnification factor */
  realsize = (double)unmodsize / 1000.0;
  if (abs((int)(unmodsize - 1095l))<2)
    realsize = 1.095445115; /*stephalf*/
  else if (abs((int)(unmodsize - 1315l))<2)
    realsize = 1.31453414; /*stepihalf*/
  else if (abs((int)(unmodsize - 1577l))<2)
    realsize = 1.57744097; /*stepiihalf*/
  else if (abs((int)(unmodsize - 1893l))<2)
    realsize = 1.89292916; /*stepiiihalf*/
  else if (abs((int)(unmodsize - 2074l))<2)
    realsize = 2.0736;   /*stepiv*/
  else if (abs((int)(unmodsize - 2488l))<2)
    realsize = 2.48832;  /*stepv*/
  else if (abs((int)(unmodsize - 2986l))<2)
    realsize = 2.985984; /*stepvi*/
  /* the remaining magnification steps are represented with sufficient
     accuracy already */
  return(realsize);
}


void FontDef(unsigned char* command, void* parent)
{
  int32_t k;
  uint32_t   c, s, d;
  uint8_t    a, l;
  unsigned char* current;
  struct font_entry *tfontptr; /* temporary font_entry pointer   */
  struct font_num *tfontnump = NULL;  /* temporary font_num pointer   */
  unsigned short i;

  current = command + 1;
  k = UNumRead(current, (int)*command - FNT_DEF1 + 1);
  current += (int)*command - FNT_DEF1 + 1;
  c = UNumRead(current, 4); /* checksum */
  s = UNumRead(current+4, 4); /* space size */
  d = UNumRead(current+8, 4); /* design size */
  a = UNumRead(current+12, 1); /* length for font name */
  l = UNumRead(current+13, 1); /* device length */
  if (((struct font_entry*)parent)->type==FONT_TYPE_VF) {
    DEBUG_PRINT(DEBUG_VF,(" %d %d %d",k,c,s));
    /* Rescale. s is relative to the actual scale /(1<<20) */
    s = (uint32_t)((uint64_t) s * (((struct font_entry*) parent)->s) 
		   / (1<<20));
    DEBUG_PRINT(DEBUG_VF,(" (%d) %d",s,d));
    /* Oddly, d differs in the DVI and the VF that my system produces */
    d = (uint32_t)((uint64_t) d * ((struct font_entry*)parent)->d
		   / ((struct font_entry*)parent)->designsize);
    DEBUG_PRINT(DEBUG_VF,(" (%d)",d));
    DEBUG_PRINT(DEBUG_VF,(" %d %d '%.*s'",a,l,a+l,current+14));
#ifdef DEBUG
  } else {
    DEBUG_PRINT(DEBUG_DVI,(" %d %d %d %d %d %d '%.*s'",k,c,s,d,a,l,
		 a+l,current+14));
#endif
  }
  if (a+l > STRSIZE-1)
    Fatal("too long font name for font %ld",k);

  /* Find entry with this font number in use */
  switch (((struct font_entry*)parent)->type) {
  case FONT_TYPE_VF:
    tfontnump = ((struct font_entry*)parent)->vffontnump;
    break;
  case DVI_TYPE:
    tfontnump = ((struct dvi_data*)parent)->fontnump;
  }
  while (tfontnump != NULL && tfontnump->k != k) {
    tfontnump = tfontnump->next;
  }
  /* If found, return if it is correct */
  if (tfontnump!=NULL 
      && tfontnump->fontp->s == s 
      && tfontnump->fontp->d == d 
      && strlen(tfontnump->fontp->n) == a+l 
      && strncmp(tfontnump->fontp->n,(char*)current+14,a+l) == 0) {
    DEBUG_PRINT((DEBUG_DVI|DEBUG_VF),("\n  FONT %d:\tMatch found",k));
    return;
  }
  /* If not found, create new */
  if (tfontnump==NULL) {
    if ((tfontnump=malloc(sizeof(struct font_num)))==NULL) 
      Fatal("cannot malloc memory for new font number");
    tfontnump->k=k;
    switch (((struct font_entry*)parent)->type) {
    case FONT_TYPE_VF:
      tfontnump->next=((struct font_entry*)parent)->vffontnump;
      ((struct font_entry*)parent)->vffontnump=tfontnump;
      break;
    case DVI_TYPE:
      tfontnump->next=((struct dvi_data*)parent)->fontnump;
      ((struct dvi_data*)parent)->fontnump=tfontnump;
    }
  }

  /* Search font list for possible match */
  tfontptr = hfontptr;
  while (tfontptr != NULL 
	 && (tfontptr->s != s 
	     || tfontptr->d != d 
	     || strlen(tfontptr->n) != a+l 
	     || strncmp(tfontptr->n,(char*)current+14,a+l) != 0 ) ) {
    tfontptr = tfontptr->next;
  }
  /* If found, set its number and return */
  if (tfontptr!=NULL) {
    DEBUG_PRINT((DEBUG_DVI|DEBUG_VF),("\n  FONT %d:\tMatch found, number set",k));
    tfontnump->fontp = tfontptr; 
    return;
  }

  DEBUG_PRINT((DEBUG_DVI|DEBUG_VF),("\n  FONT %d:\tNew entry created",k));
  /* No fitting font found, create new entry. */
  if ((tfontptr = calloc(1,sizeof(struct font_entry))) == NULL)
    Fatal("cannot malloc space for font_entry");
  tfontptr->next = hfontptr;
  hfontptr = tfontptr;
  tfontnump->fontp = tfontptr;
#ifndef WIN32
  tfontptr->fmmap.fd = 0;
#else  /* WIN32 */
  tfontptr->fmmap.hFile = INVALID_HANDLE_VALUE;
#endif
  tfontptr->c = c; /* checksum */
  tfontptr->s = s; /* space size */
  tfontptr->d = d; /* design size */
  tfontptr->a = a; /* length for font name */
  tfontptr->l = l; /* device length */
  strncpy(tfontptr->n,(char*)current+14,a+l); /* full font name */
  tfontptr->n[a+l] = '\0';
  
  tfontptr->name = NULL;
  for (i = FIRSTFNTCHAR; i <= LASTFNTCHAR; i++) {
    tfontptr->chr[i] = NULL;
  }

  tfontptr->dpi = 
    (uint32_t)((ActualFactor((uint32_t)(1000.0*tfontptr->s
				  /(double)tfontptr->d+0.5))
	     * ActualFactor(dvi->mag) * dpi*shrinkfactor) + 0.5);
#ifdef HAVE_FT2_OR_LIBT1
  tfontptr->psfontmap=NULL;
#endif
}

#ifdef HAVE_FT2_OR_LIBT1
static char* kpse_find_t1_or_tt(char* filename) 
{
    char* filepath = kpse_find_file(filename, kpse_type1_format, false);
#ifdef HAVE_FT2
    if ((option_flags & USE_FREETYPE) && filepath==NULL) 
      filepath = kpse_find_file(filename, kpse_truetype_format, false);
#endif
    return(filepath);
}
#endif

static void FontFind(struct font_entry * tfontptr)
{
  kpse_glyph_file_type font_ret;

  /* tfontptr->dpi = kpse_magstep_fix (tfontptr->dpi, resolution, NULL); */
  DEBUG_PRINT(DEBUG_DVI,("\n  FIND FONT:\t%s %d",tfontptr->n,tfontptr->dpi));

  tfontptr->name = kpse_find_vf (tfontptr->n);
  if (tfontptr->name!=NULL) 
    InitVF(tfontptr);
#ifdef HAVE_FT2_OR_LIBT1
  else if (option_flags & (USE_FREETYPE | USE_LIBT1)) {
    tfontptr->psfontmap = FindPSFontMap(tfontptr->n);
    if (tfontptr->psfontmap!=NULL)
      tfontptr->name=kpse_find_t1_or_tt(tfontptr->psfontmap->psfile);
    else
      tfontptr->name=kpse_find_t1_or_tt(tfontptr->n);
    if (tfontptr->name!=NULL) {
      char* tfmname=kpse_find_file(tfontptr->n, kpse_tfm_format, false);
      if (tfmname!=NULL) {
	if (!ReadTFM(tfontptr,tfmname)) {
	  Warning("unable to read tfm file %s", tfmname);
	  free(tfontptr->name);
	  tfontptr->name=NULL;
	} else 
#ifdef HAVE_FT2
	  if ((option_flags & USE_FREETYPE)==0 || !InitFT(tfontptr)) {
#endif
#ifdef HAVE_LIBT1
	    if ((option_flags & USE_LIBT1)==0 || !InitT1(tfontptr)) {
#endif
	      /* if Freetype or T1 loading fails for some reason, fall
		 back to PK font */
	      free(tfontptr->name);
	      tfontptr->name=NULL;
#ifdef HAVE_LIBT1
	    }
#endif
#ifdef HAVE_FT2
	  }
#endif
	free(tfmname);
      }
    }
  }
#endif /* HAVE_FT2_OR_LIBT1 */
  if (tfontptr->name==NULL) {
    tfontptr->name=kpse_find_pk (tfontptr->n, tfontptr->dpi, &font_ret);
    if (tfontptr->name!=NULL) {
      if (!FILESTRCASEEQ (tfontptr->n, font_ret.name)) {
	page_flags |= PAGE_GAVE_WARN;
	Warning("font %s not found, using %s at %d dpi instead",
		tfontptr->n, font_ret.name, font_ret.dpi);
	tfontptr->c = 0; /* no checksum warning */
      } else if (!kpse_bitmap_tolerance ((double)font_ret.dpi, 
					 (double) tfontptr->dpi)) {
	page_flags |= PAGE_GAVE_WARN;
	Warning("font %s at %d dpi not found, using %d dpi instead",
		tfontptr->n, tfontptr->dpi, font_ret.dpi);
      }
      InitPK(tfontptr);
    } else {
      page_flags |= PAGE_GAVE_WARN;
      Warning("font %s at %d dpi not found, characters will be left blank",
	      tfontptr->n, tfontptr->dpi);
#ifndef WIN32
      tfontptr->fmmap.fd = 0;
#else  /* WIN32 */
      tfontptr->fmmap.hFile = INVALID_HANDLE_VALUE;
#endif
      tfontptr->magnification = 0;
      tfontptr->designsize = 0;
    }
  }
}


static void DoneFont(struct font_entry *tfontp)
{
  switch (tfontp->type) {
  case FONT_TYPE_PK:
    DonePK(tfontp);
    break;
  case FONT_TYPE_VF:
    DoneVF(tfontp);
    break;
#ifdef HAVE_FT2
  case FONT_TYPE_FT:
    DoneFT(tfontp);
    break;
#endif
#ifdef HAVE_LIBT1
  case FONT_TYPE_T1:
    DoneT1(tfontp);
    break;
#endif
  }
}


void FreeFontNumP(struct font_num *hfontnump)
{
  struct font_num *tmp;
  while(hfontnump!=NULL) {
    tmp=hfontnump->next; 
    free(hfontnump);
    hfontnump=tmp;
  }
}

void ClearFonts(void)
{
  struct font_entry *tmp;

  while(hfontptr!=NULL) {
    tmp=hfontptr->next;
    DoneFont(hfontptr);
    if (hfontptr->name != NULL)
      free(hfontptr->name);
    free(hfontptr);
    hfontptr=tmp;
  }
  if (dvi!=NULL)
    FreeFontNumP(dvi->fontnump);
}

/*-->SetFntNum*/
/**********************************************************************/
/****************************  SetFntNum  *****************************/
/**********************************************************************/
void SetFntNum(int32_t k, void* parent /* dvi/vf */)
/*  this routine is used to specify the font to be used in printing future
    characters */
{
  struct font_num *tfontnump=NULL;  /* temporary font_num pointer   */

  switch (((struct font_entry*)parent)->type) {
  case FONT_TYPE_VF:
    tfontnump = ((struct font_entry*)parent)->vffontnump;
    break;
  case DVI_TYPE:
    tfontnump = ((struct dvi_data*)parent)->fontnump;
  }
  while (tfontnump != NULL && tfontnump->k != k)
    tfontnump = tfontnump->next;
  if (tfontnump == NULL)
    Fatal("font %d undefined", k);

  currentfont = tfontnump->fontp;
  if (currentfont->name==NULL)
    FontFind(currentfont);
}