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[FreeBSD/stable/10.git] / usr.bin / vtfontcvt / vtfontcvt.c
1 /*-
2  * Copyright (c) 2009, 2014 The FreeBSD Foundation
3  * All rights reserved.
4  *
5  * This software was developed by Ed Schouten under sponsorship from the
6  * FreeBSD Foundation.
7  *
8  * Redistribution and use in source and binary forms, with or without
9  * modification, are permitted provided that the following conditions
10  * are met:
11  * 1. Redistributions of source code must retain the above copyright
12  *    notice, this list of conditions and the following disclaimer.
13  * 2. Redistributions in binary form must reproduce the above copyright
14  *    notice, this list of conditions and the following disclaimer in the
15  *    documentation and/or other materials provided with the distribution.
16  *
17  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
18  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
19  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
20  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
21  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
22  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
23  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
24  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
25  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
26  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
27  * SUCH DAMAGE.
28  */
29
30 #include <sys/cdefs.h>
31 __FBSDID("$FreeBSD$");
32
33 #include <sys/types.h>
34 #include <sys/fnv_hash.h>
35 #include <sys/endian.h>
36 #include <sys/param.h>
37 #include <sys/queue.h>
38
39 #include <assert.h>
40 #include <err.h>
41 #include <stdint.h>
42 #include <stdio.h>
43 #include <stdlib.h>
44 #include <string.h>
45 #include <unistd.h>
46
47 #define VFNT_MAPS 4
48 #define VFNT_MAP_NORMAL 0
49 #define VFNT_MAP_NORMAL_RH 1
50 #define VFNT_MAP_BOLD 2
51 #define VFNT_MAP_BOLD_RH 3
52
53 static unsigned int width = 8, wbytes, height = 16;
54
55 struct glyph {
56         TAILQ_ENTRY(glyph)       g_list;
57         SLIST_ENTRY(glyph)       g_hash;
58         uint8_t                 *g_data;
59         unsigned int             g_index;
60 };
61
62 #define FONTCVT_NHASH 4096
63 TAILQ_HEAD(glyph_list, glyph);
64 static SLIST_HEAD(, glyph) glyph_hash[FONTCVT_NHASH];
65 static struct glyph_list glyphs[VFNT_MAPS] = {
66     TAILQ_HEAD_INITIALIZER(glyphs[0]),
67     TAILQ_HEAD_INITIALIZER(glyphs[1]),
68     TAILQ_HEAD_INITIALIZER(glyphs[2]),
69     TAILQ_HEAD_INITIALIZER(glyphs[3]),
70 };
71 static unsigned int glyph_total, glyph_count[4], glyph_unique, glyph_dupe;
72
73 struct mapping {
74         TAILQ_ENTRY(mapping)     m_list;
75         unsigned int             m_char;
76         unsigned int             m_length;
77         struct glyph            *m_glyph;
78 };
79
80 TAILQ_HEAD(mapping_list, mapping);
81 static struct mapping_list maps[VFNT_MAPS] = {
82     TAILQ_HEAD_INITIALIZER(maps[0]),
83     TAILQ_HEAD_INITIALIZER(maps[1]),
84     TAILQ_HEAD_INITIALIZER(maps[2]),
85     TAILQ_HEAD_INITIALIZER(maps[3]),
86 };
87 static unsigned int mapping_total, map_count[4], map_folded_count[4],
88     mapping_unique, mapping_dupe;
89
90 static void
91 usage(void)
92 {
93
94         (void)fprintf(stderr,
95 "usage: vtfontcvt [-w width] [-h height] [-v] normal.bdf [bold.bdf] out.fnt\n");
96         exit(1);
97 }
98
99 static void *
100 xmalloc(size_t size)
101 {
102         void *m;
103
104         if ((m = malloc(size)) == NULL)
105                 errx(1, "memory allocation failure");
106         return (m);
107 }
108
109 static int
110 add_mapping(struct glyph *gl, unsigned int c, unsigned int map_idx)
111 {
112         struct mapping *mp;
113         struct mapping_list *ml;
114
115         mapping_total++;
116
117         mp = xmalloc(sizeof *mp);
118         mp->m_char = c;
119         mp->m_glyph = gl;
120         mp->m_length = 0;
121
122         ml = &maps[map_idx];
123         if (TAILQ_LAST(ml, mapping_list) != NULL &&
124             TAILQ_LAST(ml, mapping_list)->m_char >= c)
125                 errx(1, "Bad ordering at character %u\n", c);
126         TAILQ_INSERT_TAIL(ml, mp, m_list);
127
128         map_count[map_idx]++;
129         mapping_unique++;
130
131         return (0);
132 }
133
134 static int
135 dedup_mapping(unsigned int map_idx)
136 {
137         struct mapping *mp_bold, *mp_normal, *mp_temp;
138         unsigned normal_map_idx = map_idx - VFNT_MAP_BOLD;
139
140         assert(map_idx == VFNT_MAP_BOLD || map_idx == VFNT_MAP_BOLD_RH);
141         mp_normal = TAILQ_FIRST(&maps[normal_map_idx]);
142         TAILQ_FOREACH_SAFE(mp_bold, &maps[map_idx], m_list, mp_temp) {
143                 while (mp_normal->m_char < mp_bold->m_char)
144                         mp_normal = TAILQ_NEXT(mp_normal, m_list);
145                 if (mp_bold->m_char != mp_normal->m_char)
146                         errx(1, "Character %u not in normal font!\n",
147                             mp_bold->m_char);
148                 if (mp_bold->m_glyph != mp_normal->m_glyph)
149                         continue;
150
151                 /* No mapping is needed if it's equal to the normal mapping. */
152                 TAILQ_REMOVE(&maps[map_idx], mp_bold, m_list);
153                 free(mp_bold);
154                 mapping_dupe++;
155         }
156         return (0);
157 }
158
159 static struct glyph *
160 add_glyph(const uint8_t *bytes, unsigned int map_idx, int fallback)
161 {
162         struct glyph *gl;
163         int hash;
164
165         glyph_total++;
166         glyph_count[map_idx]++;
167
168         hash = fnv_32_buf(bytes, wbytes * height, FNV1_32_INIT) % FONTCVT_NHASH;
169         SLIST_FOREACH(gl, &glyph_hash[hash], g_hash) {
170                 if (memcmp(gl->g_data, bytes, wbytes * height) == 0) {
171                         glyph_dupe++;
172                         return (gl);
173                 }
174         }
175
176         gl = xmalloc(sizeof *gl);
177         gl->g_data = xmalloc(wbytes * height);
178         memcpy(gl->g_data, bytes, wbytes * height);
179         if (fallback)
180                 TAILQ_INSERT_HEAD(&glyphs[map_idx], gl, g_list);
181         else
182                 TAILQ_INSERT_TAIL(&glyphs[map_idx], gl, g_list);
183         SLIST_INSERT_HEAD(&glyph_hash[hash], gl, g_hash);
184
185         glyph_unique++;
186         return (gl);
187 }
188
189 static int
190 add_char(unsigned curchar, unsigned map_idx, uint8_t *bytes, uint8_t *bytes_r)
191 {
192         struct glyph *gl;
193
194         /* Prevent adding two glyphs for 0xFFFD */
195         if (curchar == 0xFFFD) {
196                 if (map_idx < VFNT_MAP_BOLD)
197                         gl = add_glyph(bytes, 0, 1);
198         } else if (curchar >= 0x20) {
199                 gl = add_glyph(bytes, map_idx, 0);
200                 if (add_mapping(gl, curchar, map_idx) != 0)
201                         return (1);
202                 if (bytes_r != NULL) {
203                         gl = add_glyph(bytes_r, map_idx + 1, 0);
204                         if (add_mapping(gl, curchar,
205                             map_idx + 1) != 0)
206                                 return (1);
207                 }
208         }
209         return (0);
210 }
211
212
213 static int
214 parse_bitmap_line(uint8_t *left, uint8_t *right, unsigned int line,
215     unsigned int dwidth)
216 {
217         uint8_t *p;
218         unsigned int i, subline;
219
220         if (dwidth != width && dwidth != width * 2)
221                 errx(1, "Bitmap with unsupported width %u!\n", dwidth);
222
223         /* Move pixel data right to simplify splitting double characters. */
224         line >>= (howmany(dwidth, 8) * 8) - dwidth;
225
226         for (i = dwidth / width; i > 0; i--) {
227                 p = (i == 2) ? right : left;
228
229                 subline = line & ((1 << width) - 1);
230                 subline <<= (howmany(width, 8) * 8) - width;
231
232                 if (wbytes == 1) {
233                         *p = subline;
234                 } else if (wbytes == 2) {
235                         *p++ = subline >> 8;
236                         *p = subline;
237                 } else {
238                         errx(1, "Unsupported wbytes %u!\n", wbytes);
239                 }
240
241                 line >>= width;
242         }
243
244         return (0);
245 }
246
247 static int
248 parse_bdf(FILE *fp, unsigned int map_idx)
249 {
250         char *ln;
251         size_t length;
252         uint8_t bytes[wbytes * height], bytes_r[wbytes * height];
253         unsigned int curchar = 0, dwidth = 0, i, line;
254
255         while ((ln = fgetln(fp, &length)) != NULL) {
256                 ln[length - 1] = '\0';
257
258                 if (strncmp(ln, "ENCODING ", 9) == 0) {
259                         curchar = atoi(ln + 9);
260                 }
261
262                 if (strncmp(ln, "DWIDTH ", 7) == 0) {
263                         dwidth = atoi(ln + 7);
264                 }
265
266                 if (strncmp(ln, "BITMAP", 6) == 0 &&
267                     (ln[6] == ' ' || ln[6] == '\0')) {
268                         /*
269                          * Assume that the next _height_ lines are bitmap
270                          * data.  ENDCHAR is allowed to terminate the bitmap
271                          * early but is not otherwise checked; any extra data
272                          * is ignored.
273                          */
274                         for (i = 0; i < height; i++) {
275                                 if ((ln = fgetln(fp, &length)) == NULL)
276                                         errx(1, "Unexpected EOF!\n");
277                                 ln[length - 1] = '\0';
278                                 if (strcmp(ln, "ENDCHAR") == 0) {
279                                         memset(bytes + i * wbytes, 0,
280                                             (height - i) * wbytes);
281                                         memset(bytes_r + i * wbytes, 0,
282                                             (height - i) * wbytes);
283                                         break;
284                                 }
285                                 sscanf(ln, "%x", &line);
286                                 if (parse_bitmap_line(bytes + i * wbytes,
287                                      bytes_r + i * wbytes, line, dwidth) != 0)
288                                         return (1);
289                         }
290
291                         if (add_char(curchar, map_idx, bytes,
292                             dwidth == width * 2 ? bytes_r : NULL) != 0)
293                                 return (1);
294                 }
295         }
296
297         return (0);
298 }
299
300 static void
301 set_width(int w)
302 {
303
304         if (w <= 0 || w > 128)
305                 errx(1, "invalid width %d", w);
306         width = w;
307         wbytes = howmany(width, 8);
308 }
309
310 static int
311 parse_hex(FILE *fp, unsigned int map_idx)
312 {
313         char *ln, *p;
314         char fmt_str[8];
315         size_t length;
316         uint8_t *bytes = NULL, *bytes_r = NULL;
317         unsigned curchar = 0, i, line, chars_per_row, dwidth;
318         int rv = 0;
319
320         while ((ln = fgetln(fp, &length)) != NULL) {
321                 ln[length - 1] = '\0';
322
323                 if (strncmp(ln, "# Height: ", 10) == 0) {
324                         if (bytes != NULL)
325                                 errx(1, "malformed input: Height tag after font data");
326                         height = atoi(ln + 10);
327                 } else if (strncmp(ln, "# Width: ", 9) == 0) {
328                         if (bytes != NULL)
329                                 errx(1, "malformed input: Width tag after font data");
330                         set_width(atoi(ln + 9));
331                 } else if (sscanf(ln, "%6x:", &curchar)) {
332                         if (bytes == NULL) {
333                                 bytes = xmalloc(wbytes * height);
334                                 bytes_r = xmalloc(wbytes * height);
335                         }
336                         /* ln is guaranteed to have a colon here. */
337                         p = strchr(ln, ':') + 1;
338                         chars_per_row = strlen(p) / height;
339                         dwidth = width;
340                         if (chars_per_row / 2 > (width + 7) / 8)
341                                 dwidth *= 2; /* Double-width character. */
342                         snprintf(fmt_str, sizeof(fmt_str), "%%%ux",
343                             chars_per_row);
344
345                         for (i = 0; i < height; i++) {
346                                 sscanf(p, fmt_str, &line);
347                                 p += chars_per_row;
348                                 if (parse_bitmap_line(bytes + i * wbytes,
349                                     bytes_r + i * wbytes, line, dwidth) != 0) {
350                                         rv = 1;
351                                         goto out;
352                                 }
353                         }
354
355                         if (add_char(curchar, map_idx, bytes,
356                             dwidth == width * 2 ? bytes_r : NULL) != 0) {
357                                 rv = 1;
358                                 goto out;
359                         }
360                 }
361         }
362 out:
363         free(bytes);
364         free(bytes_r);
365         return (rv);
366 }
367
368 static int
369 parse_file(const char *filename, unsigned int map_idx)
370 {
371         FILE *fp;
372         size_t len;
373         int rv;
374
375         fp = fopen(filename, "r");
376         if (fp == NULL) {
377                 perror(filename);
378                 return (1);
379         }
380         len = strlen(filename);
381         if (len > 4 && strcasecmp(filename + len - 4, ".hex") == 0)
382                 rv = parse_hex(fp, map_idx);
383         else
384                 rv = parse_bdf(fp, map_idx);
385         fclose(fp);
386         return (rv);
387 }
388
389 static void
390 number_glyphs(void)
391 {
392         struct glyph *gl;
393         unsigned int i, idx = 0;
394
395         for (i = 0; i < VFNT_MAPS; i++)
396                 TAILQ_FOREACH(gl, &glyphs[i], g_list)
397                         gl->g_index = idx++;
398 }
399
400 static int
401 write_glyphs(FILE *fp)
402 {
403         struct glyph *gl;
404         unsigned int i;
405
406         for (i = 0; i < VFNT_MAPS; i++) {
407                 TAILQ_FOREACH(gl, &glyphs[i], g_list)
408                         if (fwrite(gl->g_data, wbytes * height, 1, fp) != 1)
409                                 return (1);
410         }
411         return (0);
412 }
413
414 static void
415 fold_mappings(unsigned int map_idx)
416 {
417         struct mapping_list *ml = &maps[map_idx];
418         struct mapping *mn, *mp, *mbase;
419
420         mp = mbase = TAILQ_FIRST(ml);
421         for (mp = mbase = TAILQ_FIRST(ml); mp != NULL; mp = mn) {
422                 mn = TAILQ_NEXT(mp, m_list);
423                 if (mn != NULL && mn->m_char == mp->m_char + 1 &&
424                     mn->m_glyph->g_index == mp->m_glyph->g_index + 1)
425                         continue;
426                 mbase->m_length = mp->m_char - mbase->m_char + 1;
427                 mbase = mp = mn;
428                 map_folded_count[map_idx]++;
429         }
430 }
431
432 struct file_mapping {
433         uint32_t        source;
434         uint16_t        destination;
435         uint16_t        length;
436 } __packed;
437
438 static int
439 write_mappings(FILE *fp, unsigned int map_idx)
440 {
441         struct mapping_list *ml = &maps[map_idx];
442         struct mapping *mp;
443         struct file_mapping fm;
444         unsigned int i = 0, j = 0;
445
446         TAILQ_FOREACH(mp, ml, m_list) {
447                 j++;
448                 if (mp->m_length > 0) {
449                         i += mp->m_length;
450                         fm.source = htobe32(mp->m_char);
451                         fm.destination = htobe16(mp->m_glyph->g_index);
452                         fm.length = htobe16(mp->m_length - 1);
453                         if (fwrite(&fm, sizeof fm, 1, fp) != 1)
454                                 return (1);
455                 }
456         }
457         assert(i == j);
458         return (0);
459 }
460
461 struct file_header {
462         uint8_t         magic[8];
463         uint8_t         width;
464         uint8_t         height;
465         uint16_t        pad;
466         uint32_t        glyph_count;
467         uint32_t        map_count[4];
468 } __packed;
469
470 static int
471 write_fnt(const char *filename)
472 {
473         FILE *fp;
474         struct file_header fh = {
475                 .magic = "VFNT0002",
476         };
477
478         fp = fopen(filename, "wb");
479         if (fp == NULL) {
480                 perror(filename);
481                 return (1);
482         }
483
484         fh.width = width;
485         fh.height = height;
486         fh.glyph_count = htobe32(glyph_unique);
487         fh.map_count[0] = htobe32(map_folded_count[0]);
488         fh.map_count[1] = htobe32(map_folded_count[1]);
489         fh.map_count[2] = htobe32(map_folded_count[2]);
490         fh.map_count[3] = htobe32(map_folded_count[3]);
491         if (fwrite(&fh, sizeof fh, 1, fp) != 1) {
492                 perror(filename);
493                 fclose(fp);
494                 return (1);
495         }
496
497         if (write_glyphs(fp) != 0 ||
498             write_mappings(fp, VFNT_MAP_NORMAL) != 0 ||
499             write_mappings(fp, 1) != 0 ||
500             write_mappings(fp, VFNT_MAP_BOLD) != 0 ||
501             write_mappings(fp, 3) != 0) {
502                 perror(filename);
503                 fclose(fp);
504                 return (1);
505         }
506
507         fclose(fp);
508         return (0);
509 }
510
511 static void
512 print_font_info(void)
513 {
514         printf(
515 "Statistics:\n"
516 "- glyph_total:                 %6u\n"
517 "- glyph_normal:                %6u\n"
518 "- glyph_normal_right:          %6u\n"
519 "- glyph_bold:                  %6u\n"
520 "- glyph_bold_right:            %6u\n"
521 "- glyph_unique:                %6u\n"
522 "- glyph_dupe:                  %6u\n"
523 "- mapping_total:               %6u\n"
524 "- mapping_normal:              %6u\n"
525 "- mapping_normal_folded:       %6u\n"
526 "- mapping_normal_right:        %6u\n"
527 "- mapping_normal_right_folded: %6u\n"
528 "- mapping_bold:                %6u\n"
529 "- mapping_bold_folded:         %6u\n"
530 "- mapping_bold_right:          %6u\n"
531 "- mapping_bold_right_folded:   %6u\n"
532 "- mapping_unique:              %6u\n"
533 "- mapping_dupe:                %6u\n",
534             glyph_total,
535             glyph_count[0],
536             glyph_count[1],
537             glyph_count[2],
538             glyph_count[3],
539             glyph_unique, glyph_dupe,
540             mapping_total,
541             map_count[0], map_folded_count[0],
542             map_count[1], map_folded_count[1],
543             map_count[2], map_folded_count[2],
544             map_count[3], map_folded_count[3],
545             mapping_unique, mapping_dupe);
546 }
547
548 int
549 main(int argc, char *argv[])
550 {
551         int ch, val, verbose = 0;
552
553         assert(sizeof(struct file_header) == 32);
554         assert(sizeof(struct file_mapping) == 8);
555
556         while ((ch = getopt(argc, argv, "h:vw:")) != -1) {
557                 switch (ch) {
558                 case 'h':
559                         val = atoi(optarg);
560                         if (val <= 0 || val > 128)
561                                 errx(1, "Invalid height %d", val);
562                         height = val;
563                         break;
564                 case 'v':
565                         verbose = 1;
566                         break;
567                 case 'w':
568                         set_width(atoi(optarg));
569                         break;
570                 case '?':
571                 default:
572                         usage();
573                 }
574         }
575         argc -= optind;
576         argv += optind;
577
578         if (argc < 2 || argc > 3)
579                 usage();
580
581         wbytes = howmany(width, 8);
582
583         if (parse_file(argv[0], VFNT_MAP_NORMAL) != 0)
584                 return (1);
585         argc--;
586         argv++;
587         if (argc == 2) {
588                 if (parse_file(argv[0], VFNT_MAP_BOLD) != 0)
589                         return (1);
590                 argc--;
591                 argv++;
592         }
593         number_glyphs();
594         dedup_mapping(VFNT_MAP_BOLD);
595         dedup_mapping(VFNT_MAP_BOLD_RH);
596         fold_mappings(0);
597         fold_mappings(1);
598         fold_mappings(2);
599         fold_mappings(3);
600         if (write_fnt(argv[0]) != 0)
601                 return (1);
602
603         if (verbose)
604                 print_font_info();
605
606         return (0);
607 }