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                         for (i = 0; i < height; i++) {
 269                                 if ((ln = fgetln(fp, &length)) == NULL)
 270                                         errx(1, "Unexpected EOF!\n");
 271                                 ln[length - 1] = '\0';
 272                                 sscanf(ln, "%x", &line);
 273                                 if (parse_bitmap_line(bytes + i * wbytes,
 274                                      bytes_r + i * wbytes, line, dwidth) != 0)
 275                                         return (1);
 276                         }
 277
 278                         if (add_char(curchar, map_idx, bytes,
 279                             dwidth == width * 2 ? bytes_r : NULL) != 0)
 280                                 return (1);
 281                 }
 282         }
 283
 284         return (0);
 285 }
 286
 287 static void
 288 set_width(int w)
 289 {
 290
 291         if (w <= 0 || w > 128)
 292                 errx(1, "invalid width %d", w);
 293         width = w;
 294         wbytes = howmany(width, 8);
 295 }
 296
 297 static int
 298 parse_hex(FILE *fp, unsigned int map_idx)
 299 {
 300         char *ln, *p;
 301         char fmt_str[8];
 302         size_t length;
 303         uint8_t *bytes = NULL, *bytes_r = NULL;
 304         unsigned curchar = 0, i, line, chars_per_row, dwidth;
 305         int rv = 0;
 306
 307         while ((ln = fgetln(fp, &length)) != NULL) {
 308                 ln[length - 1] = '\0';
 309
 310                 if (strncmp(ln, "# Height: ", 10) == 0) {
 311                         if (bytes != NULL)
 312                                 errx(1, "malformed input: Height tag after font data");
 313                         height = atoi(ln + 10);
 314                 } else if (strncmp(ln, "# Width: ", 9) == 0) {
 315                         if (bytes != NULL)
 316                                 errx(1, "malformed input: Width tag after font data");
 317                         set_width(atoi(ln + 9));
 318                 } else if (sscanf(ln, "%4x:", &curchar)) {
 319                         if (bytes == NULL) {
 320                                 bytes = xmalloc(wbytes * height);
 321                                 bytes_r = xmalloc(wbytes * height);
 322                         }
 323                         p = ln + 5;
 324                         chars_per_row = strlen(p) / height;
 325                         dwidth = width;
 326                         if (chars_per_row / 2 > (width + 7) / 8)
 327                                 dwidth *= 2; /* Double-width character. */
 328                         snprintf(fmt_str, sizeof(fmt_str), "%%%ux",
 329                             chars_per_row);
 330
 331                         for (i = 0; i < height; i++) {
 332                                 sscanf(p, fmt_str, &line);
 333                                 p += chars_per_row;
 334                                 if (parse_bitmap_line(bytes + i * wbytes,
 335                                     bytes_r + i * wbytes, line, dwidth) != 0) {
 336                                         rv = 1;
 337                                         goto out;
 338                                 }
 339                         }
 340
 341                         if (add_char(curchar, map_idx, bytes,
 342                             dwidth == width * 2 ? bytes_r : NULL) != 0) {
 343                                 rv = 1;
 344                                 goto out;
 345                         }
 346                 }
 347         }
 348 out:
 349         free(bytes);
 350         free(bytes_r);
 351         return (rv);
 352 }
 353
 354 static int
 355 parse_file(const char *filename, unsigned int map_idx)
 356 {
 357         FILE *fp;
 358         size_t len;
 359         int rv;
 360
 361         fp = fopen(filename, "r");
 362         if (fp == NULL) {
 363                 perror(filename);
 364                 return (1);
 365         }
 366         len = strlen(filename);
 367         if (len > 4 && strcasecmp(filename + len - 4, ".hex") == 0)
 368                 rv = parse_hex(fp, map_idx);
 369         else
 370                 rv = parse_bdf(fp, map_idx);
 371         fclose(fp);
 372         return (rv);
 373 }
 374
 375 static void
 376 number_glyphs(void)
 377 {
 378         struct glyph *gl;
 379         unsigned int i, idx = 0;
 380
 381         for (i = 0; i < VFNT_MAPS; i++)
 382                 TAILQ_FOREACH(gl, &glyphs[i], g_list)
 383                         gl->g_index = idx++;
 384 }
 385
 386 static int
 387 write_glyphs(FILE *fp)
 388 {
 389         struct glyph *gl;
 390         unsigned int i;
 391
 392         for (i = 0; i < VFNT_MAPS; i++) {
 393                 TAILQ_FOREACH(gl, &glyphs[i], g_list)
 394                         if (fwrite(gl->g_data, wbytes * height, 1, fp) != 1)
 395                                 return (1);
 396         }
 397         return (0);
 398 }
 399
 400 static void
 401 fold_mappings(unsigned int map_idx)
 402 {
 403         struct mapping_list *ml = &maps[map_idx];
 404         struct mapping *mn, *mp, *mbase;
 405
 406         mp = mbase = TAILQ_FIRST(ml);
 407         for (mp = mbase = TAILQ_FIRST(ml); mp != NULL; mp = mn) {
 408                 mn = TAILQ_NEXT(mp, m_list);
 409                 if (mn != NULL && mn->m_char == mp->m_char + 1 &&
 410                     mn->m_glyph->g_index == mp->m_glyph->g_index + 1)
 411                         continue;
 412                 mbase->m_length = mp->m_char - mbase->m_char + 1;
 413                 mbase = mp = mn;
 414                 map_folded_count[map_idx]++;
 415         }
 416 }
 417
 418 struct file_mapping {
 419         uint32_t        source;
 420         uint16_t        destination;
 421         uint16_t        length;
 422 } __packed;
 423
 424 static int
 425 write_mappings(FILE *fp, unsigned int map_idx)
 426 {
 427         struct mapping_list *ml = &maps[map_idx];
 428         struct mapping *mp;
 429         struct file_mapping fm;
 430         unsigned int i = 0, j = 0;
 431
 432         TAILQ_FOREACH(mp, ml, m_list) {
 433                 j++;
 434                 if (mp->m_length > 0) {
 435                         i += mp->m_length;
 436                         fm.source = htobe32(mp->m_char);
 437                         fm.destination = htobe16(mp->m_glyph->g_index);
 438                         fm.length = htobe16(mp->m_length - 1);
 439                         if (fwrite(&fm, sizeof fm, 1, fp) != 1)
 440                                 return (1);
 441                 }
 442         }
 443         assert(i == j);
 444         return (0);
 445 }
 446
 447 struct file_header {
 448         uint8_t         magic[8];
 449         uint8_t         width;
 450         uint8_t         height;
 451         uint16_t        pad;
 452         uint32_t        glyph_count;
 453         uint32_t        map_count[4];
 454 } __packed;
 455
 456 static int
 457 write_fnt(const char *filename)
 458 {
 459         FILE *fp;
 460         struct file_header fh = {
 461                 .magic = "VFNT0002",
 462         };
 463
 464         fp = fopen(filename, "wb");
 465         if (fp == NULL) {
 466                 perror(filename);
 467                 return (1);
 468         }
 469
 470         fh.width = width;
 471         fh.height = height;
 472         fh.glyph_count = htobe32(glyph_unique);
 473         fh.map_count[0] = htobe32(map_folded_count[0]);
 474         fh.map_count[1] = htobe32(map_folded_count[1]);
 475         fh.map_count[2] = htobe32(map_folded_count[2]);
 476         fh.map_count[3] = htobe32(map_folded_count[3]);
 477         if (fwrite(&fh, sizeof fh, 1, fp) != 1) {
 478                 perror(filename);
 479                 fclose(fp);
 480                 return (1);
 481         }
 482
 483         if (write_glyphs(fp) != 0 ||
 484             write_mappings(fp, VFNT_MAP_NORMAL) != 0 ||
 485             write_mappings(fp, 1) != 0 ||
 486             write_mappings(fp, VFNT_MAP_BOLD) != 0 ||
 487             write_mappings(fp, 3) != 0) {
 488                 perror(filename);
 489                 fclose(fp);
 490                 return (1);
 491         }
 492
 493         fclose(fp);
 494         return (0);
 495 }
 496
 497 static void
 498 print_font_info(void)
 499 {
 500         printf(
 501 "Statistics:\n"
 502 "- glyph_total:                 %5u\n"
 503 "- glyph_normal:                %5u\n"
 504 "- glyph_normal_right:          %5u\n"
 505 "- glyph_bold:                  %5u\n"
 506 "- glyph_bold_right:            %5u\n"
 507 "- glyph_unique:                %5u\n"
 508 "- glyph_dupe:                  %5u\n"
 509 "- mapping_total:               %5u\n"
 510 "- mapping_normal:              %5u\n"
 511 "- mapping_normal_folded:       %5u\n"
 512 "- mapping_normal_right:        %5u\n"
 513 "- mapping_normal_right_folded: %5u\n"
 514 "- mapping_bold:                %5u\n"
 515 "- mapping_bold_folded:         %5u\n"
 516 "- mapping_bold_right:          %5u\n"
 517 "- mapping_bold_right_folded:   %5u\n"
 518 "- mapping_unique:              %5u\n"
 519 "- mapping_dupe:                %5u\n",
 520             glyph_total,
 521             glyph_count[0],
 522             glyph_count[1],
 523             glyph_count[2],
 524             glyph_count[3],
 525             glyph_unique, glyph_dupe,
 526             mapping_total,
 527             map_count[0], map_folded_count[0],
 528             map_count[1], map_folded_count[1],
 529             map_count[2], map_folded_count[2],
 530             map_count[3], map_folded_count[3],
 531             mapping_unique, mapping_dupe);
 532 }
 533
 534 int
 535 main(int argc, char *argv[])
 536 {
 537         int ch, val, verbose = 0;
 538
 539         assert(sizeof(struct file_header) == 32);
 540         assert(sizeof(struct file_mapping) == 8);
 541
 542         while ((ch = getopt(argc, argv, "h:vw:")) != -1) {
 543                 switch (ch) {
 544                 case 'h':
 545                         val = atoi(optarg);
 546                         if (val <= 0 || val > 128)
 547                                 errx(1, "Invalid height %d", val);
 548                         height = val;
 549                         break;
 550                 case 'v':
 551                         verbose = 1;
 552                         break;
 553                 case 'w':
 554                         set_width(atoi(optarg));
 555                         break;
 556                 case '?':
 557                 default:
 558                         usage();
 559                 }
 560         }
 561         argc -= optind;
 562         argv += optind;
 563
 564         if (argc < 2 || argc > 3)
 565                 usage();
 566
 567         wbytes = howmany(width, 8);
 568
 569         if (parse_file(argv[0], VFNT_MAP_NORMAL) != 0)
 570                 return (1);
 571         argc--;
 572         argv++;
 573         if (argc == 2) {
 574                 if (parse_file(argv[0], VFNT_MAP_BOLD) != 0)
 575                         return (1);
 576                 argc--;
 577                 argv++;
 578         }
 579         number_glyphs();
 580         dedup_mapping(VFNT_MAP_BOLD);
 581         dedup_mapping(VFNT_MAP_BOLD_RH);
 582         fold_mappings(0);
 583         fold_mappings(1);
 584         fold_mappings(2);
 585         fold_mappings(3);
 586         if (write_fnt(argv[0]) != 0)
 587                 return (1);
 588
 589         if (verbose)
 590                 print_font_info();
 591
 592         return (0);
 593 }