| 1 | /* |
| 2 | * Support for sfnt-housed fonts for Halibut |
| 3 | * |
| 4 | * sfnt-housed fonts include TrueType, OpenType, sfnt-housed Type 1 |
| 5 | * fonts and a couple of bitmap formats. |
| 6 | * |
| 7 | * The various tables that can appear in sfnt-housed fonts are defined |
| 8 | * in several places. These include: |
| 9 | * |
| 10 | * The OpenType Specification: |
| 11 | * <http://partners.adobe.com/public/developer/opentype/index_spec.html> |
| 12 | * |
| 13 | * The TrueType Reference Manual: |
| 14 | * <http://developer.apple.com/textfonts/TTRefMan/> |
| 15 | * |
| 16 | * Microsoft typography specifications: |
| 17 | * <http://www.microsoft.com/typography/SpecificationsOverview.mspx> |
| 18 | */ |
| 19 | |
| 20 | #include <assert.h> |
| 21 | #include <stddef.h> |
| 22 | #include <stdio.h> |
| 23 | #include <stdlib.h> |
| 24 | #include "halibut.h" |
| 25 | #include "paper.h" |
| 26 | |
| 27 | typedef struct sfnt_decode_Tag sfnt_decode; |
| 28 | struct sfnt_decode_Tag { |
| 29 | void (*decoder)(void *src, void *dest); |
| 30 | size_t src_len; |
| 31 | size_t dest_offset; |
| 32 | }; |
| 33 | |
| 34 | #if 0 /* unused */ |
| 35 | static void decode_uint8(void *src, void *dest) { |
| 36 | *(unsigned int *)dest = *(unsigned char *)src; |
| 37 | } |
| 38 | #define d_uint8 decode_uint8, 1 |
| 39 | #endif |
| 40 | |
| 41 | #if 0 /* unused */ |
| 42 | static void decode_int8(void *src, void *dest) { |
| 43 | *(int *)dest = *(signed char *)src; |
| 44 | } |
| 45 | #define d_int8 decode_int8, 1 |
| 46 | #endif |
| 47 | |
| 48 | static void decode_uint16(void *src, void *dest) { |
| 49 | unsigned char *cp = src; |
| 50 | *(unsigned int *)dest = (cp[0] << 8) + cp[1]; |
| 51 | } |
| 52 | #define d_uint16 decode_uint16, 2 |
| 53 | |
| 54 | static void decode_int16(void *src, void *dest) { |
| 55 | signed char *cp = src; |
| 56 | unsigned char *ucp = src; |
| 57 | *(int *)dest = (cp[0] << 8) + ucp[1]; |
| 58 | } |
| 59 | #define d_int16 decode_int16, 2 |
| 60 | |
| 61 | static void decode_uint32(void *src, void *dest) { |
| 62 | unsigned char *cp = src; |
| 63 | *(unsigned int *)dest = |
| 64 | (cp[0] << 24) + (cp[1] << 16) + (cp[2] << 8) + cp[3]; |
| 65 | } |
| 66 | #define d_uint32 decode_uint32, 4 |
| 67 | |
| 68 | static void decode_int32(void *src, void *dest) { |
| 69 | signed char *cp = src; |
| 70 | unsigned char *ucp = src; |
| 71 | *(int *)dest = (cp[0] << 24) + (ucp[1] << 16) + (ucp[2] << 8) + ucp[3]; |
| 72 | } |
| 73 | #define d_int32 decode_int32, 4 |
| 74 | |
| 75 | static void decode_skip(void *src, void *dest) { |
| 76 | IGNORE(src); |
| 77 | IGNORE(dest); |
| 78 | /* do nothing */ |
| 79 | } |
| 80 | #define d_skip(n) decode_skip, (n), 0 |
| 81 | |
| 82 | static void decode_end(void *src, void *dest) { |
| 83 | IGNORE(src); |
| 84 | IGNORE(dest); |
| 85 | /* never called */ |
| 86 | } |
| 87 | #define d_end decode_end, 0, 0 |
| 88 | |
| 89 | static void *decode(sfnt_decode *dec, void *src, void *end, void *dest) { |
| 90 | while (dec->decoder != decode_end) { |
| 91 | if ((char *)src + dec->src_len > (char *)end) return NULL; |
| 92 | dec->decoder(src, (char *)dest + dec->dest_offset); |
| 93 | src = (char *)src + dec->src_len; |
| 94 | dec++; |
| 95 | } |
| 96 | return src; |
| 97 | } |
| 98 | |
| 99 | static void *decoden(sfnt_decode *dec, void *src, void *end, void *dest, |
| 100 | size_t size, size_t n) { |
| 101 | while (n-- && src) { |
| 102 | src = decode(dec, src, end, dest); |
| 103 | dest = (char *)dest + size; |
| 104 | } |
| 105 | return src; |
| 106 | } |
| 107 | |
| 108 | /* Decoding specs for simple data types */ |
| 109 | sfnt_decode uint16_decode[] = { { d_uint16, 0 }, { d_end } }; |
| 110 | sfnt_decode int16_decode[] = { { d_int16, 0 }, { d_end } }; |
| 111 | sfnt_decode uint32_decode[] = { { d_uint32, 0 }, { d_end } }; |
| 112 | |
| 113 | /* Offset subdirectory -- the start of the file */ |
| 114 | typedef struct offsubdir_Tag offsubdir; |
| 115 | struct offsubdir_Tag { |
| 116 | unsigned scaler_type; |
| 117 | unsigned numTables; |
| 118 | }; |
| 119 | sfnt_decode offsubdir_decode[] = { |
| 120 | { d_uint32, offsetof(offsubdir, scaler_type) }, |
| 121 | { d_uint16, offsetof(offsubdir, numTables) }, |
| 122 | { d_skip(6) }, |
| 123 | { d_end } |
| 124 | }; |
| 125 | |
| 126 | #define sfnt_00010000 0x00010000 |
| 127 | #define TAG_OS_2 0x4f532f32 |
| 128 | #define TAG_cmap 0x636d6170 |
| 129 | #define TAG_glyf 0x676c7966 |
| 130 | #define TAG_head 0x68656164 |
| 131 | #define TAG_hhea 0x68686561 |
| 132 | #define TAG_hmtx 0x686d7478 |
| 133 | #define TAG_kern 0x6b65726e |
| 134 | #define TAG_loca 0x6c6f6361 |
| 135 | #define TAG_name 0x6e616d65 |
| 136 | #define TAG_post 0x706f7374 |
| 137 | #define sfnt_true 0x74727565 |
| 138 | |
| 139 | /* Table directory */ |
| 140 | typedef struct tabledir_Tag tabledir; |
| 141 | struct tabledir_Tag { |
| 142 | unsigned tag; |
| 143 | unsigned checkSum; |
| 144 | unsigned offset; |
| 145 | unsigned length; |
| 146 | }; |
| 147 | sfnt_decode tabledir_decode[] = { |
| 148 | { d_uint32, offsetof(tabledir, tag) }, |
| 149 | { d_uint32, offsetof(tabledir, checkSum) }, |
| 150 | { d_uint32, offsetof(tabledir, offset) }, |
| 151 | { d_uint32, offsetof(tabledir, length) }, |
| 152 | { d_end } |
| 153 | }; |
| 154 | |
| 155 | /* OS/2 and Windows compatibility table */ |
| 156 | typedef struct t_OS_2_Tag t_OS_2; |
| 157 | struct t_OS_2_Tag { |
| 158 | unsigned version; |
| 159 | int sTypoAscender, sTypoDescender; |
| 160 | int sxHeight, sCapHeight; |
| 161 | }; |
| 162 | sfnt_decode t_OS_2_v0_decode[] = { |
| 163 | { d_uint16, offsetof(t_OS_2, version) }, |
| 164 | { d_skip(66) }, /* xAvgCharWidth, usWeightClass, usWidthClass, fsType, */ |
| 165 | /* ySubscriptXSize, ySubscriptYSize, ySubscriptXOffset, */ |
| 166 | /* ySubscriptYOffset, ySuperscriptXSize, ySuperscriptYSize, */ |
| 167 | /* ySuperscriptXOffset, ySupercriptYOffset, sFamilyClass, panose, */ |
| 168 | /* ulUnicodeRange1, ulUnicodeRange2, ulUnicodeRange3, ulUnicodeRange4, */ |
| 169 | /* achVendID, fsSelection, usFirstCharIndex, usLastCharIndex */ |
| 170 | { d_end } |
| 171 | }; |
| 172 | sfnt_decode t_OS_2_v1_decode[] = { |
| 173 | { d_uint16, offsetof(t_OS_2, version) }, |
| 174 | { d_skip(66) }, /* xAvgCharWidth, usWeightClass, usWidthClass, fsType, */ |
| 175 | /* ySubscriptXSize, ySubscriptYSize, ySubscriptXOffset, */ |
| 176 | /* ySubscriptYOffset, ySuperscriptXSize, ySuperscriptYSize, */ |
| 177 | /* ySuperscriptXOffset, ySupercriptYOffset, sFamilyClass, panose, */ |
| 178 | /* ulUnicodeRange1, ulUnicodeRange2, ulUnicodeRange3, ulUnicodeRange4, */ |
| 179 | /* achVendID, fsSelection, usFirstCharIndex, usLastCharIndex */ |
| 180 | { d_int16, offsetof(t_OS_2, sTypoAscender) }, |
| 181 | { d_int16, offsetof(t_OS_2, sTypoDescender) }, |
| 182 | { d_skip(14) }, /* sTypoLineGap, usWinAscent, usWinDescent, */ |
| 183 | /* ulCodePageRange1, ulCodePageRange2 */ |
| 184 | { d_end } |
| 185 | }; |
| 186 | sfnt_decode t_OS_2_v2_decode[] = { |
| 187 | { d_uint16, offsetof(t_OS_2, version) }, |
| 188 | { d_skip(66) }, /* xAvgCharWidth, usWeightClass, usWidthClass, fsType, */ |
| 189 | /* ySubscriptXSize, ySubscriptYSize, ySubscriptXOffset, */ |
| 190 | /* ySubscriptYOffset, ySuperscriptXSize, ySuperscriptYSize, */ |
| 191 | /* ySuperscriptXOffset, ySupercriptYOffset, sFamilyClass, panose, */ |
| 192 | /* ulUnicodeRange1, ulUnicodeRange2, ulUnicodeRange3, ulUnicodeRange4, */ |
| 193 | /* achVendID, fsSelection, usFirstCharIndex, usLastCharIndex */ |
| 194 | { d_int16, offsetof(t_OS_2, sTypoAscender) }, |
| 195 | { d_int16, offsetof(t_OS_2, sTypoDescender) }, |
| 196 | { d_skip(14) }, /* sTypoLineGap, usWinAscent, usWinDescent, */ |
| 197 | /* ulCodePageRange1, ulCodePageRange2 */ |
| 198 | { d_int16, offsetof(t_OS_2, sxHeight) }, |
| 199 | { d_int16, offsetof(t_OS_2, sCapHeight) }, |
| 200 | { d_skip(6) }, /* usDefaultChar, usBreakChar, usMaxContext */ |
| 201 | { d_end } |
| 202 | }; |
| 203 | |
| 204 | /* Character to Glyph ('cmap') table */ |
| 205 | typedef struct t_cmap_Tag t_cmap; |
| 206 | struct t_cmap_Tag { |
| 207 | unsigned numTables; |
| 208 | }; |
| 209 | sfnt_decode t_cmap_decode[] = { |
| 210 | { d_skip(2) }, |
| 211 | { d_uint16, offsetof(t_cmap, numTables) }, |
| 212 | { d_end } |
| 213 | }; |
| 214 | typedef struct encodingrec_Tag encodingrec; |
| 215 | struct encodingrec_Tag { |
| 216 | unsigned platformID; |
| 217 | unsigned encodingID; |
| 218 | unsigned offset; |
| 219 | }; |
| 220 | sfnt_decode encodingrec_decode[] = { |
| 221 | { d_uint16, offsetof(encodingrec, platformID) }, |
| 222 | { d_uint16, offsetof(encodingrec, encodingID) }, |
| 223 | { d_uint32, offsetof(encodingrec, offset) }, |
| 224 | { d_end } |
| 225 | }; |
| 226 | typedef struct cmap4_Tag cmap4; |
| 227 | struct cmap4_Tag { |
| 228 | unsigned length; |
| 229 | unsigned segCountX2; |
| 230 | }; |
| 231 | sfnt_decode cmap4_decode[] = { |
| 232 | { d_skip(2) }, /* format */ |
| 233 | { d_uint16, offsetof(cmap4, length) }, |
| 234 | { d_skip(2) }, /* language */ |
| 235 | { d_uint16, offsetof(cmap4, segCountX2) }, |
| 236 | { d_skip(6) }, /* searchRange, entrySelector, rangeShift */ |
| 237 | { d_end } |
| 238 | }; |
| 239 | |
| 240 | /* Font Header ('head') table */ |
| 241 | typedef struct t_head_Tag t_head; |
| 242 | struct t_head_Tag { |
| 243 | unsigned version; |
| 244 | unsigned fontRevision; |
| 245 | unsigned flags; |
| 246 | unsigned unitsPerEm; |
| 247 | int xMin, yMin, xMax, yMax; |
| 248 | int indexToLocFormat; |
| 249 | }; |
| 250 | sfnt_decode t_head_decode[] = { |
| 251 | { d_uint32, offsetof(t_head, version) }, |
| 252 | { d_uint32, offsetof(t_head, fontRevision) }, |
| 253 | { d_skip(8) }, /* checkSumAdjustment, magicNumber, flags */ |
| 254 | { d_uint16, offsetof(t_head, flags) }, |
| 255 | { d_uint16, offsetof(t_head, unitsPerEm) }, |
| 256 | { d_skip(16) }, /* created, modified */ |
| 257 | { d_int16, offsetof(t_head, xMin) }, |
| 258 | { d_int16, offsetof(t_head, yMin) }, |
| 259 | { d_int16, offsetof(t_head, xMax) }, |
| 260 | { d_int16, offsetof(t_head, yMax) }, |
| 261 | { d_skip(6) }, /* macStyle, lowestRecPPEM, fontDirectionHint */ |
| 262 | { d_int16, offsetof(t_head, indexToLocFormat) }, |
| 263 | { d_skip(2) }, |
| 264 | { d_end } |
| 265 | }; |
| 266 | |
| 267 | /* Horizontal Header ('hhea') table */ |
| 268 | typedef struct t_hhea_Tag t_hhea; |
| 269 | struct t_hhea_Tag { |
| 270 | unsigned version; |
| 271 | int ascent; |
| 272 | int descent; |
| 273 | int lineGap; |
| 274 | int metricDataFormat; |
| 275 | unsigned numOfLongHorMetrics; |
| 276 | }; |
| 277 | sfnt_decode t_hhea_decode[] = { |
| 278 | { d_uint32, offsetof(t_hhea, version) }, |
| 279 | { d_int16, offsetof(t_hhea, ascent) }, |
| 280 | { d_int16, offsetof(t_hhea, descent) }, |
| 281 | { d_int16, offsetof(t_hhea, lineGap) }, |
| 282 | { d_skip(22) }, |
| 283 | { d_int16, offsetof(t_hhea, metricDataFormat) }, |
| 284 | { d_uint16, offsetof(t_hhea, numOfLongHorMetrics) }, |
| 285 | { d_end } |
| 286 | }; |
| 287 | |
| 288 | /* Horizontal Metrics ('hmtx') table */ |
| 289 | sfnt_decode longhormetric_decode[] = { |
| 290 | { d_uint16, 0 }, |
| 291 | { d_skip(2) }, |
| 292 | { d_end } |
| 293 | }; |
| 294 | |
| 295 | /* Kerning ('kern') table */ |
| 296 | typedef struct t_kern_Tag t_kern; |
| 297 | struct t_kern_Tag { |
| 298 | unsigned version; |
| 299 | unsigned nTables; |
| 300 | }; |
| 301 | sfnt_decode t_kern_v0_decode[] = { |
| 302 | { d_uint16, offsetof(t_kern, version) }, |
| 303 | { d_uint16, offsetof(t_kern, nTables) }, |
| 304 | { d_end } |
| 305 | }; |
| 306 | typedef struct kern_v0_subhdr_Tag kern_v0_subhdr; |
| 307 | struct kern_v0_subhdr_Tag { |
| 308 | unsigned version; |
| 309 | unsigned length; |
| 310 | unsigned coverage; |
| 311 | }; |
| 312 | sfnt_decode kern_v0_subhdr_decode[] = { |
| 313 | { d_uint16, offsetof(kern_v0_subhdr, version) }, |
| 314 | { d_uint16, offsetof(kern_v0_subhdr, length) }, |
| 315 | { d_uint16, offsetof(kern_v0_subhdr, coverage) }, |
| 316 | { d_end } |
| 317 | }; |
| 318 | #define KERN_V0_HORIZ 0x0001 |
| 319 | #define KERN_V0_MINIMUM 0x0002 |
| 320 | #define KERN_V0_CROSSSTREAM 0x0004 |
| 321 | #define KERN_V0_OVERRIDE 0x0008 |
| 322 | #define KERN_V0_FORMAT 0xff00 |
| 323 | #define KERN_V0_FORMAT_0 0x0000 |
| 324 | sfnt_decode t_kern_v1_decode[] = { |
| 325 | { d_uint32, offsetof(t_kern, version) }, |
| 326 | { d_uint32, offsetof(t_kern, nTables) }, |
| 327 | { d_end } |
| 328 | }; |
| 329 | typedef struct kern_v1_subhdr_Tag kern_v1_subhdr; |
| 330 | struct kern_v1_subhdr_Tag { |
| 331 | unsigned length; |
| 332 | unsigned coverage; |
| 333 | }; |
| 334 | sfnt_decode kern_v1_subhdr_decode[] = { |
| 335 | { d_uint32, offsetof(kern_v1_subhdr, length) }, |
| 336 | { d_uint16, offsetof(kern_v1_subhdr, coverage) }, |
| 337 | { d_skip(2) }, /* tupleIndex */ |
| 338 | { d_end } |
| 339 | }; |
| 340 | #define KERN_V1_VERTICAL 0x8000 |
| 341 | #define KERN_V1_CROSSSTREAM 0x4000 |
| 342 | #define KERN_V1_VARIATION 0x2000 |
| 343 | #define KERN_V1_FORMAT 0x00ff |
| 344 | #define KERN_V1_FORMAT_0 0x0000 |
| 345 | typedef struct kern_f0_Tag kern_f0; |
| 346 | struct kern_f0_Tag { |
| 347 | unsigned nPairs; |
| 348 | }; |
| 349 | sfnt_decode kern_f0_decode[] = { |
| 350 | { d_uint16, offsetof(kern_f0, nPairs) }, |
| 351 | { d_skip(6) }, /* searchRange, entrySelector, rangeShift */ |
| 352 | { d_end } |
| 353 | }; |
| 354 | typedef struct kern_f0_pair_Tag kern_f0_pair; |
| 355 | struct kern_f0_pair_Tag { |
| 356 | unsigned left; |
| 357 | unsigned right; |
| 358 | int value; |
| 359 | }; |
| 360 | sfnt_decode kern_f0_pair_decode[] = { |
| 361 | { d_uint16, offsetof(kern_f0_pair, left) }, |
| 362 | { d_uint16, offsetof(kern_f0_pair, right) }, |
| 363 | { d_int16, offsetof(kern_f0_pair, value) }, |
| 364 | { d_end } |
| 365 | }; |
| 366 | |
| 367 | /* Naming ('name') table */ |
| 368 | typedef struct t_name_Tag t_name; |
| 369 | typedef struct namerecord_Tag namerecord; |
| 370 | struct t_name_Tag { |
| 371 | unsigned format; |
| 372 | unsigned count; |
| 373 | unsigned stringOffset; |
| 374 | namerecord *nameRecord; |
| 375 | }; |
| 376 | sfnt_decode t_name_decode[] = { |
| 377 | { d_uint16, offsetof(t_name, format) }, |
| 378 | { d_uint16, offsetof(t_name, count) }, |
| 379 | { d_uint16, offsetof(t_name, stringOffset) }, |
| 380 | { d_end } |
| 381 | }; |
| 382 | struct namerecord_Tag { |
| 383 | unsigned platformID; |
| 384 | unsigned encodingID; |
| 385 | unsigned languageID; |
| 386 | unsigned nameID; |
| 387 | unsigned length; |
| 388 | unsigned offset; |
| 389 | }; |
| 390 | sfnt_decode namerecord_decode[] = { |
| 391 | { d_uint16, offsetof(namerecord, platformID) }, |
| 392 | { d_uint16, offsetof(namerecord, encodingID) }, |
| 393 | { d_uint16, offsetof(namerecord, languageID) }, |
| 394 | { d_uint16, offsetof(namerecord, nameID) }, |
| 395 | { d_uint16, offsetof(namerecord, length) }, |
| 396 | { d_uint16, offsetof(namerecord, offset) }, |
| 397 | { d_end } |
| 398 | }; |
| 399 | |
| 400 | /* PostScript compatibility ('post') table */ |
| 401 | typedef struct t_post_Tag t_post; |
| 402 | struct t_post_Tag { |
| 403 | unsigned format; |
| 404 | int italicAngle; |
| 405 | int underlinePosition; |
| 406 | int underlineThickness; |
| 407 | unsigned isFixedPitch; |
| 408 | unsigned minMemType42; |
| 409 | unsigned maxMemType42; |
| 410 | }; |
| 411 | sfnt_decode t_post_decode[] = { |
| 412 | { d_uint32, offsetof(t_post, format) }, |
| 413 | { d_int32, offsetof(t_post, italicAngle) }, |
| 414 | { d_int16, offsetof(t_post, underlinePosition) }, |
| 415 | { d_int16, offsetof(t_post, underlineThickness) }, |
| 416 | { d_uint32, offsetof(t_post, isFixedPitch) }, |
| 417 | { d_uint32, offsetof(t_post, minMemType42) }, |
| 418 | { d_uint32, offsetof(t_post, maxMemType42) }, |
| 419 | { d_skip(8) }, /* minMemType1, maxMemType1 */ |
| 420 | { d_end } |
| 421 | }; |
| 422 | |
| 423 | typedef struct { |
| 424 | glyph name; |
| 425 | unsigned short index; |
| 426 | } glyphmap; |
| 427 | |
| 428 | struct sfnt_Tag { |
| 429 | void *data; |
| 430 | size_t len; |
| 431 | void *end; |
| 432 | filepos pos; |
| 433 | offsubdir osd; |
| 434 | tabledir *td; |
| 435 | t_head head; |
| 436 | unsigned nglyphs; |
| 437 | glyph *glyphsbyindex; |
| 438 | unsigned short *glyphsbyname; |
| 439 | unsigned minmem, maxmem; |
| 440 | }; |
| 441 | |
| 442 | static int sfnt_findtable(sfnt *sf, unsigned tag, |
| 443 | void **startp, void **endp) { |
| 444 | size_t i; |
| 445 | |
| 446 | for (i = 0; i < sf->osd.numTables; i++) { |
| 447 | if (sf->td[i].tag == tag) { |
| 448 | *startp = (char *)sf->data + sf->td[i].offset; |
| 449 | *endp = (char *)*startp + sf->td[i].length; |
| 450 | return TRUE; |
| 451 | } |
| 452 | } |
| 453 | return FALSE; |
| 454 | } |
| 455 | |
| 456 | static char *sfnt_psname(font_info *fi) { |
| 457 | sfnt *sf = fi->fontfile; |
| 458 | t_name name; |
| 459 | void *ptr, *end; |
| 460 | size_t i; |
| 461 | char *psname; |
| 462 | namerecord *nr; |
| 463 | |
| 464 | if (!sfnt_findtable(sf, TAG_name, &ptr, &end)) { |
| 465 | error(err_sfntnotable, &sf->pos, "name"); |
| 466 | return NULL; |
| 467 | } |
| 468 | ptr = decode(t_name_decode, ptr, end, &name); |
| 469 | name.nameRecord = snewn(name.count, namerecord); |
| 470 | ptr = decoden(namerecord_decode, ptr, sf->end, name.nameRecord, |
| 471 | sizeof(*name.nameRecord), name.count); |
| 472 | for (i = 0; i < name.count; i++) { |
| 473 | nr = name.nameRecord + i; |
| 474 | if (nr->nameID == 6) { |
| 475 | /* PostScript name, but can we make sense of it? */ |
| 476 | if (nr->platformID == 1 && nr->encodingID == 0) { |
| 477 | /* Mac Roman, which is ASCII for our purposes */ |
| 478 | psname = snewn(nr->length + 1, char); |
| 479 | memcpy(psname, (char *)ptr + nr->offset, nr->length); |
| 480 | psname[nr->length] = 0; |
| 481 | sfree(name.nameRecord); |
| 482 | return psname; |
| 483 | } |
| 484 | } |
| 485 | } |
| 486 | error(err_sfntnopsname, &sf->pos); |
| 487 | return NULL; |
| 488 | } |
| 489 | |
| 490 | static unsigned short *cmp_glyphsbyindex; |
| 491 | static int glyphsbyname_cmp(void const *a, void const *b) { |
| 492 | glyph ga = cmp_glyphsbyindex[*(unsigned short *)a]; |
| 493 | glyph gb = cmp_glyphsbyindex[*(unsigned short *)b]; |
| 494 | if (ga < gb) return -1; |
| 495 | if (ga > gb) return 1; |
| 496 | return 0; |
| 497 | } |
| 498 | static int glyphsbyname_cmp_search(void const *a, void const *b) { |
| 499 | glyph ga = *(glyph *)a; |
| 500 | glyph gb = cmp_glyphsbyindex[*(unsigned short *)b]; |
| 501 | if (ga < gb) return -1; |
| 502 | if (ga > gb) return 1; |
| 503 | return 0; |
| 504 | } |
| 505 | |
| 506 | /* |
| 507 | * Extract data from the 'post' table (mostly glyph mappings) |
| 508 | * |
| 509 | * TODO: cope better with duplicated glyph names (usually .notdef) |
| 510 | * TODO: when presented with format 3.0, try to use 'CFF' if present. |
| 511 | */ |
| 512 | static void sfnt_mapglyphs(font_info *fi) { |
| 513 | sfnt *sf = fi->fontfile; |
| 514 | t_post post; |
| 515 | void *ptr, *end; |
| 516 | unsigned char *sptr; |
| 517 | char tmp[256]; |
| 518 | glyph *extraglyphs; |
| 519 | unsigned nextras, i, g; |
| 520 | |
| 521 | sf->glyphsbyname = sf->glyphsbyindex = NULL; |
| 522 | if (!sfnt_findtable(sf, TAG_post, &ptr, &end)) { |
| 523 | error(err_sfntnotable, &sf->pos, "post"); |
| 524 | return; |
| 525 | } |
| 526 | ptr = decode(t_post_decode, ptr, end, &post); |
| 527 | if (ptr == NULL) { |
| 528 | error(err_sfntbadtable, &sf->pos, "post"); |
| 529 | return; |
| 530 | } |
| 531 | |
| 532 | sf->minmem = post.minMemType42; |
| 533 | sf->maxmem = post.maxMemType42; |
| 534 | fi->italicangle = post.italicAngle / 65536.0; |
| 535 | switch (post.format) { |
| 536 | case 0x00010000: |
| 537 | sf->nglyphs = 258; |
| 538 | sf->glyphsbyindex = (glyph *)tt_std_glyphs; |
| 539 | break; |
| 540 | case 0x00020000: |
| 541 | if ((char *)ptr + 2 > (char *)end) return; |
| 542 | decode_uint16(ptr, &sf->nglyphs); |
| 543 | ptr = (char *)ptr + 2; |
| 544 | if ((char *)ptr + 2*sf->nglyphs > (char *)end) return; |
| 545 | nextras = 0; |
| 546 | for (sptr = (unsigned char *)ptr + 2*sf->nglyphs; |
| 547 | sptr < (unsigned char *)end; |
| 548 | sptr += *sptr+1) |
| 549 | nextras++; |
| 550 | extraglyphs = snewn(nextras, glyph); |
| 551 | i = 0; |
| 552 | for (sptr = (unsigned char *)ptr + 2*sf->nglyphs; |
| 553 | sptr < (unsigned char *)end; |
| 554 | sptr += *sptr+1) { |
| 555 | memcpy(tmp, sptr + 1, *sptr); |
| 556 | tmp[*sptr] = 0; |
| 557 | assert(i < nextras); |
| 558 | extraglyphs[i++] = glyph_intern(tmp); |
| 559 | } |
| 560 | sf->glyphsbyindex = snewn(sf->nglyphs, glyph); |
| 561 | for (i = 0; i < sf->nglyphs; i++) { |
| 562 | decode_uint16((char *)ptr + 2*i, &g); |
| 563 | if (g <= 257) |
| 564 | sf->glyphsbyindex[i] = tt_std_glyphs[g]; |
| 565 | else if (g < 258 + nextras) |
| 566 | sf->glyphsbyindex[i] = extraglyphs[g - 258]; |
| 567 | else |
| 568 | sf->glyphsbyindex[i] = NOGLYPH; |
| 569 | } |
| 570 | sfree(extraglyphs); |
| 571 | break; |
| 572 | default: |
| 573 | error(err_sfnttablevers, &sf->pos, "post"); |
| 574 | return; |
| 575 | } |
| 576 | /* Construct glyphsbyname */ |
| 577 | sf->glyphsbyname = snewn(sf->nglyphs, unsigned short); |
| 578 | for (i = 0; i < sf->nglyphs; i++) |
| 579 | sf->glyphsbyname[i] = i; |
| 580 | cmp_glyphsbyindex = sf->glyphsbyindex; |
| 581 | qsort(sf->glyphsbyname, sf->nglyphs, sizeof(*sf->glyphsbyname), |
| 582 | glyphsbyname_cmp); |
| 583 | } |
| 584 | |
| 585 | glyph sfnt_indextoglyph(sfnt *sf, unsigned idx) { |
| 586 | return sf->glyphsbyindex[idx]; |
| 587 | } |
| 588 | |
| 589 | unsigned sfnt_nglyphs(sfnt *sf) { |
| 590 | return sf->nglyphs; |
| 591 | } |
| 592 | |
| 593 | unsigned sfnt_glyphtoindex(sfnt *sf, glyph g) { |
| 594 | cmp_glyphsbyindex = sf->glyphsbyindex; |
| 595 | return *(unsigned short *)bsearch(&g, sf->glyphsbyname, sf->nglyphs, |
| 596 | sizeof(*sf->glyphsbyname), |
| 597 | glyphsbyname_cmp_search); |
| 598 | } |
| 599 | |
| 600 | /* |
| 601 | * Get data from 'hhea', 'hmtx', and 'OS/2' tables |
| 602 | */ |
| 603 | void sfnt_getmetrics(font_info *fi) { |
| 604 | sfnt *sf = fi->fontfile; |
| 605 | t_hhea hhea; |
| 606 | t_OS_2 OS_2; |
| 607 | void *ptr, *end; |
| 608 | unsigned i, j; |
| 609 | unsigned *hmtx; |
| 610 | |
| 611 | /* First, the bounding box from the 'head' table. */ |
| 612 | fi->fontbbox[0] = sf->head.xMin * FUNITS_PER_PT / sf->head.unitsPerEm; |
| 613 | fi->fontbbox[1] = sf->head.yMin * FUNITS_PER_PT / sf->head.unitsPerEm; |
| 614 | fi->fontbbox[2] = sf->head.xMax * FUNITS_PER_PT / sf->head.unitsPerEm; |
| 615 | fi->fontbbox[3] = sf->head.yMax * FUNITS_PER_PT / sf->head.unitsPerEm; |
| 616 | if (!sfnt_findtable(sf, TAG_hhea, &ptr, &end)) { |
| 617 | error(err_sfntnotable, &sf->pos, "hhea"); |
| 618 | return; |
| 619 | } |
| 620 | if (decode(t_hhea_decode, ptr, end, &hhea) == NULL) { |
| 621 | error(err_sfntbadtable, &sf->pos, "hhea"); |
| 622 | return; |
| 623 | } |
| 624 | if ((hhea.version & 0xffff0000) != 0x00010000) { |
| 625 | error(err_sfnttablevers, &sf->pos, "hhea"); |
| 626 | return; |
| 627 | } |
| 628 | fi->ascent = hhea.ascent; |
| 629 | fi->descent = hhea.descent; |
| 630 | if (hhea.metricDataFormat != 0) { |
| 631 | error(err_sfnttablevers, &sf->pos, "hmtx"); |
| 632 | return; |
| 633 | } |
| 634 | if (!sfnt_findtable(sf, TAG_hmtx, &ptr, &end)) { |
| 635 | error(err_sfntnotable, &sf->pos, "hmtx"); |
| 636 | return; |
| 637 | } |
| 638 | hmtx = snewn(hhea.numOfLongHorMetrics, unsigned); |
| 639 | if (decoden(longhormetric_decode, ptr, end, hmtx, sizeof(*hmtx), |
| 640 | hhea.numOfLongHorMetrics) == NULL) { |
| 641 | error(err_sfntbadtable, &sf->pos, "hmtx"); |
| 642 | return; |
| 643 | } |
| 644 | for (i = 0; i < sf->nglyphs; i++) { |
| 645 | glyph_width *w = snew(glyph_width); |
| 646 | w->glyph = sfnt_indextoglyph(sf, i); |
| 647 | j = i < hhea.numOfLongHorMetrics ? i : hhea.numOfLongHorMetrics - 1; |
| 648 | w->width = hmtx[j] * UNITS_PER_PT / sf->head.unitsPerEm; |
| 649 | add234(fi->widths, w); |
| 650 | } |
| 651 | /* Now see if the 'OS/2' table has any useful metrics */ |
| 652 | if (!sfnt_findtable(sf, TAG_OS_2, &ptr, &end)) |
| 653 | return; |
| 654 | if (decode(uint16_decode, ptr, end, &OS_2.version) == NULL) |
| 655 | goto bados2; |
| 656 | if (OS_2.version >= 2) { |
| 657 | if (decode(t_OS_2_v2_decode, ptr, end, &OS_2) == NULL) |
| 658 | goto bados2; |
| 659 | fi->xheight = OS_2.sxHeight * FUNITS_PER_PT / sf->head.unitsPerEm; |
| 660 | fi->capheight = OS_2.sCapHeight * FUNITS_PER_PT / sf->head.unitsPerEm; |
| 661 | } else if (OS_2.version == 1) { |
| 662 | if (decode(t_OS_2_v1_decode, ptr, end, &OS_2) == NULL) |
| 663 | goto bados2; |
| 664 | } else |
| 665 | return; |
| 666 | fi->ascent = OS_2.sTypoAscender * FUNITS_PER_PT / sf->head.unitsPerEm; |
| 667 | fi->descent = OS_2.sTypoDescender * FUNITS_PER_PT / sf->head.unitsPerEm; |
| 668 | return; |
| 669 | bados2: |
| 670 | error(err_sfntbadtable, &sf->pos, "OS/2"); |
| 671 | } |
| 672 | |
| 673 | /* |
| 674 | * Get kerning data from a 'kern' table |
| 675 | * |
| 676 | * 'kern' tables have two gratuitously different header formats, one |
| 677 | * used by Apple and one by Microsoft. Happily, the kerning tables |
| 678 | * themselves use the same formats. Halibut only supports simple kern |
| 679 | * pairs for horizontal kerning of horizontal text, and ignores |
| 680 | * everything else. |
| 681 | */ |
| 682 | static void sfnt_getkern(font_info *fi) { |
| 683 | sfnt *sf = fi->fontfile; |
| 684 | t_kern kern; |
| 685 | unsigned version, i, j; |
| 686 | void *ptr, *end; |
| 687 | |
| 688 | if (!sfnt_findtable(sf, TAG_kern, &ptr, &end)) |
| 689 | return; |
| 690 | if (!decode(uint16_decode, ptr, end, &version)) |
| 691 | goto bad; |
| 692 | if (version == 0) |
| 693 | ptr = decode(t_kern_v0_decode, ptr, end, &kern); |
| 694 | else if (version == 1) |
| 695 | ptr = decode(t_kern_v1_decode, ptr, end, &kern); |
| 696 | else return; |
| 697 | if (ptr == NULL) goto bad; |
| 698 | for (i = 0; i < kern.nTables; i++) { |
| 699 | kern_f0 f0; |
| 700 | kern_pair *kerns; |
| 701 | if (version == 0) { |
| 702 | kern_v0_subhdr sub; |
| 703 | ptr = decode(kern_v0_subhdr_decode, ptr, end, &sub); |
| 704 | if (ptr == NULL) goto bad; |
| 705 | if (sub.version != 0 || |
| 706 | (sub.coverage & (KERN_V0_HORIZ | KERN_V0_MINIMUM | |
| 707 | KERN_V0_CROSSSTREAM | KERN_V0_FORMAT)) != |
| 708 | (KERN_V0_HORIZ | KERN_V0_FORMAT_0)) { |
| 709 | ptr = (char *)ptr + sub.length - 6; |
| 710 | continue; |
| 711 | } |
| 712 | } else { |
| 713 | kern_v1_subhdr sub; |
| 714 | ptr = decode(kern_v1_subhdr_decode, ptr, end, &sub); |
| 715 | if (ptr == NULL) goto bad; |
| 716 | if ((sub.coverage & (KERN_V1_VERTICAL | KERN_V1_CROSSSTREAM | |
| 717 | KERN_V1_VARIATION | KERN_V1_FORMAT)) != |
| 718 | KERN_V0_FORMAT_0) { |
| 719 | ptr = (char *)ptr + sub.length - 8; |
| 720 | continue; |
| 721 | } |
| 722 | } |
| 723 | ptr = decode(kern_f0_decode, ptr, end, &f0); |
| 724 | if (ptr == NULL) goto bad; |
| 725 | kerns = snewn(f0.nPairs, kern_pair); |
| 726 | for (j = 0; j < f0.nPairs; j++) { |
| 727 | kern_f0_pair p; |
| 728 | kern_pair *kp = kerns + j; |
| 729 | ptr = decode(kern_f0_pair_decode, ptr, end, &p); |
| 730 | if (ptr == NULL) goto bad; |
| 731 | if (p.left >= sf->nglyphs || p.right >= sf->nglyphs) goto bad; |
| 732 | kp->left = sfnt_indextoglyph(sf, p.left); |
| 733 | kp->right = sfnt_indextoglyph(sf, p.right); |
| 734 | kp->kern = p.value * UNITS_PER_PT / (int)sf->head.unitsPerEm; |
| 735 | add234(fi->kerns, kp); |
| 736 | } |
| 737 | } |
| 738 | return; |
| 739 | bad: |
| 740 | error(err_sfntbadtable, &sf->pos, "kern"); |
| 741 | return; |
| 742 | } |
| 743 | |
| 744 | /* |
| 745 | * Get mapping data from 'cmap' table |
| 746 | * |
| 747 | * We look for either a (0, 3), or (3, 1) table, both of these being |
| 748 | * versions of UCS-2. We only handle format 4 of this table, since |
| 749 | * that seems to be the only one in use. |
| 750 | */ |
| 751 | void sfnt_getmap(font_info *fi) { |
| 752 | sfnt *sf = fi->fontfile; |
| 753 | t_cmap cmap; |
| 754 | encodingrec *esd; |
| 755 | void *base, *ptr, *end; |
| 756 | unsigned i; |
| 757 | unsigned format; |
| 758 | |
| 759 | |
| 760 | for (i = 0; i < lenof(fi->bmp); i++) |
| 761 | fi->bmp[i] = 0xFFFF; |
| 762 | if (!sfnt_findtable(sf, TAG_cmap, &ptr, &end)) { |
| 763 | error(err_sfntnotable, &sf->pos, "cmap"); |
| 764 | } |
| 765 | base = ptr; |
| 766 | ptr = decode(t_cmap_decode, ptr, end, &cmap); |
| 767 | if (ptr == NULL) goto bad; |
| 768 | esd = snewn(cmap.numTables, encodingrec); |
| 769 | ptr = decoden(encodingrec_decode, ptr, end, esd, sizeof(*esd), |
| 770 | cmap.numTables); |
| 771 | if (ptr == NULL) goto bad; |
| 772 | for (i = 0; i < cmap.numTables; i++) { |
| 773 | if (!decode(uint16_decode, (char *)base + esd[i].offset, end, &format)) |
| 774 | goto bad; |
| 775 | if ((esd[i].platformID == 0 && esd[i].encodingID == 3) || |
| 776 | (esd[i].platformID == 3 && esd[i].encodingID == 1)) { |
| 777 | /* UCS-2 encoding */ |
| 778 | if (!decode(uint16_decode, (char *)base + esd[i].offset, end, |
| 779 | &format)) |
| 780 | goto bad; |
| 781 | if (format == 4) { |
| 782 | unsigned *data, *endCode, *startCode, *idDelta, *idRangeOffset; |
| 783 | unsigned *glyphIndexArray; |
| 784 | unsigned segcount, nword, nglyphindex, j; |
| 785 | cmap4 cmap4; |
| 786 | |
| 787 | ptr = decode(cmap4_decode, (char *)base + esd[i].offset, end, |
| 788 | &cmap4); |
| 789 | if (!ptr) goto bad; |
| 790 | segcount = cmap4.segCountX2 / 2; |
| 791 | nword = cmap4.length / 2 - 7; |
| 792 | data = snewn(nword, unsigned); |
| 793 | if (!decoden(uint16_decode, ptr, (char *)ptr + nword * 2, |
| 794 | data, sizeof(*data), nword)) goto bad; |
| 795 | endCode = data; |
| 796 | startCode = data + segcount + 1; |
| 797 | idDelta = startCode + segcount; |
| 798 | idRangeOffset = idDelta + segcount; |
| 799 | glyphIndexArray = idRangeOffset + segcount; |
| 800 | nglyphindex = nword - segcount * 4 - 1; |
| 801 | |
| 802 | for (j = 0; j < segcount; j++) { |
| 803 | unsigned k, idx; |
| 804 | |
| 805 | if (idRangeOffset[j] == 0) { |
| 806 | for (k = startCode[j]; k <= endCode[j]; k++) { |
| 807 | idx = (k + idDelta[j]) & 0xffff; |
| 808 | if (idx != 0) { |
| 809 | if (idx > sf->nglyphs) goto bad; |
| 810 | fi->bmp[k] = sfnt_indextoglyph(sf, idx); |
| 811 | } |
| 812 | } |
| 813 | } else { |
| 814 | unsigned startidx = idRangeOffset[j]/2 - segcount + j; |
| 815 | for (k = startCode[j]; k <= endCode[j]; k++) { |
| 816 | idx = glyphIndexArray[startidx + k - startCode[j]]; |
| 817 | if (idx != 0) { |
| 818 | idx = (idx + idDelta[j]) & 0xffff; |
| 819 | if (idx > sf->nglyphs) goto bad; |
| 820 | fi->bmp[k] = sfnt_indextoglyph(sf, idx); |
| 821 | } |
| 822 | } |
| 823 | } |
| 824 | } |
| 825 | sfree(data); |
| 826 | return; |
| 827 | } |
| 828 | } |
| 829 | } |
| 830 | error(err_sfntnounicmap, &sf->pos); |
| 831 | return; |
| 832 | bad: |
| 833 | error(err_sfntbadtable, &sf->pos, "cmap"); |
| 834 | } |
| 835 | |
| 836 | void read_sfnt_file(input *in) { |
| 837 | sfnt *sf = snew(sfnt); |
| 838 | size_t off = 0, got; |
| 839 | FILE *fp = in->currfp; |
| 840 | font_info *fi = snew(font_info); |
| 841 | void *ptr, *end; |
| 842 | |
| 843 | fi->name = NULL; |
| 844 | fi->widths = newtree234(width_cmp); |
| 845 | fi->kerns = newtree234(kern_cmp); |
| 846 | fi->ligs = newtree234(lig_cmp); |
| 847 | fi->fontbbox[0] = fi->fontbbox[1] = fi->fontbbox[2] = fi->fontbbox[3] = 0; |
| 848 | fi->capheight = fi->xheight = fi->ascent = fi->descent = 0; |
| 849 | fi->stemh = fi->stemv = fi->italicangle = 0; |
| 850 | fi->fontfile = sf; |
| 851 | fi->filetype = TRUETYPE; |
| 852 | |
| 853 | sf->len = 32768; |
| 854 | sf->data = snewn(sf->len, unsigned char); |
| 855 | for (;;) { |
| 856 | got = fread((char *)sf->data + off, 1, sf->len - off, fp); |
| 857 | off += got; |
| 858 | if (off != sf->len) break; |
| 859 | sf->len *= 2; |
| 860 | sf->data = sresize(sf->data, sf->len, unsigned char); |
| 861 | } |
| 862 | fclose(in->currfp); |
| 863 | sf->len = off; |
| 864 | sf->data = sresize(sf->data, sf->len, unsigned char); |
| 865 | sf->end = (char *)sf->data + sf->len; |
| 866 | sf->pos = in->pos; |
| 867 | sf->pos.line = 0; |
| 868 | sf->nglyphs = 0; |
| 869 | ptr = decode(offsubdir_decode, sf->data, sf->end, &sf->osd); |
| 870 | if (ptr == NULL) { |
| 871 | error(err_sfntbadhdr, &sf->pos); |
| 872 | return; |
| 873 | } |
| 874 | sf->td = snewn(sf->osd.numTables, tabledir); |
| 875 | ptr = decoden(tabledir_decode, ptr, sf->end, sf->td, sizeof(*sf->td), |
| 876 | sf->osd.numTables); |
| 877 | if (ptr == NULL) { |
| 878 | error(err_sfntbadhdr, &sf->pos); |
| 879 | return; |
| 880 | } |
| 881 | if (!sfnt_findtable(sf, TAG_head, &ptr, &end)) { |
| 882 | error(err_sfntnotable, &sf->pos, "head"); |
| 883 | return; |
| 884 | } |
| 885 | if (decode(t_head_decode, ptr, end, &sf->head) == NULL) { |
| 886 | error(err_sfntbadtable, &sf->pos, "head"); |
| 887 | return; |
| 888 | } |
| 889 | if ((sf->head.version & 0xffff0000) != 0x00010000) { |
| 890 | error(err_sfnttablevers, &sf->pos, "head"); |
| 891 | return; |
| 892 | } |
| 893 | fi->name = sfnt_psname(fi); |
| 894 | if (fi->name == NULL) return; |
| 895 | sfnt_mapglyphs(fi); |
| 896 | sfnt_getmetrics(fi); |
| 897 | sfnt_getkern(fi); |
| 898 | sfnt_getmap(fi); |
| 899 | fi->next = all_fonts; |
| 900 | all_fonts = fi; |
| 901 | } |
| 902 | |
| 903 | static int sizecmp(const void *a, const void *b) { |
| 904 | if (*(size_t *)a < *(size_t *)b) return -1; |
| 905 | if (*(size_t *)a > *(size_t *)b) return 1; |
| 906 | return 0; |
| 907 | } |
| 908 | |
| 909 | /* |
| 910 | * The format for embedding TrueType fonts in Postscript is defined in |
| 911 | * Adobe Technical Note #5012: The Type 42 Font Format Specification. |
| 912 | * <http://partners.adobe.com/public/developer/en/font/5012.Type42_Spec.pdf> |
| 913 | */ |
| 914 | |
| 915 | void sfnt_writeps(font_info const *fi, FILE *ofp) { |
| 916 | unsigned i, j, lastbreak; |
| 917 | sfnt *sf = fi->fontfile; |
| 918 | size_t *breaks, glyfoff, glyflen; |
| 919 | void *glyfptr, *glyfend, *locaptr, *locaend; |
| 920 | unsigned *loca; |
| 921 | int cc = 0; |
| 922 | |
| 923 | /* XXX Unclear that this is the correct format. */ |
| 924 | fprintf(ofp, "%%!PS-TrueTypeFont-%u-%u\n", sf->osd.scaler_type, |
| 925 | sf->head.fontRevision); |
| 926 | if (sf->minmem) |
| 927 | fprintf(ofp, "%%%%VMUsage: %u %u\n", sf->minmem, sf->maxmem); |
| 928 | fprintf(ofp, "9 dict dup begin\n"); |
| 929 | fprintf(ofp, "/FontType 42 def\n"); |
| 930 | fprintf(ofp, "/FontMatrix [1 0 0 1 0 0] def\n"); |
| 931 | fprintf(ofp, "/FontName /%s def\n", fi->name); |
| 932 | fprintf(ofp, "/Encoding StandardEncoding def\n"); |
| 933 | if ((sf->head.flags & 0x0003) == 0x0003) { |
| 934 | /* |
| 935 | * Sensible font with the origin in the right place, such that |
| 936 | * the bounding box is meaningful. |
| 937 | */ |
| 938 | fprintf(ofp, "/FontBBox [%g %g %g %g] readonly def\n", |
| 939 | (double)sf->head.xMin / sf->head.unitsPerEm, |
| 940 | (double)sf->head.yMin / sf->head.unitsPerEm, |
| 941 | (double)sf->head.xMax / sf->head.unitsPerEm, |
| 942 | (double)sf->head.yMax / sf->head.unitsPerEm); |
| 943 | } else { |
| 944 | /* Non-sensible font. */ |
| 945 | fprintf(ofp, "/FontBBox [0 0 0 0] readonly def\n"); |
| 946 | } |
| 947 | fprintf(ofp, "/PaintType 0 def\n"); |
| 948 | fprintf(ofp, "/CharStrings %u dict dup begin\n", sf->nglyphs); |
| 949 | fprintf(ofp, "0 1 %u{currentfile token pop exch def}bind for\n", |
| 950 | sf->nglyphs - 1); |
| 951 | for (i = 0; i < sf->nglyphs; i++) |
| 952 | ps_token(ofp, &cc, "/%s", glyph_extern(sfnt_indextoglyph(sf, i))); |
| 953 | fprintf(ofp, "\nend readonly def\n"); |
| 954 | fprintf(ofp, "/sfnts [<"); |
| 955 | breaks = snewn(sf->osd.numTables + sf->nglyphs, size_t); |
| 956 | for (i = 0; i < sf->osd.numTables; i++) { |
| 957 | breaks[i] = sf->td[i].offset; |
| 958 | } |
| 959 | if (!sfnt_findtable(sf, TAG_glyf, &glyfptr, &glyfend)) { |
| 960 | error(err_sfntnotable, &sf->pos, "glyf"); |
| 961 | return; |
| 962 | } |
| 963 | glyfoff = (char *)glyfptr - (char *)sf->data; |
| 964 | glyflen = (char *)glyfend - (char *)glyfptr; |
| 965 | if (!sfnt_findtable(sf, TAG_loca, &locaptr, &locaend)) { |
| 966 | error(err_sfntnotable, &sf->pos, "loca"); |
| 967 | return; |
| 968 | } |
| 969 | loca = snewn(sf->nglyphs, unsigned); |
| 970 | if (sf->head.indexToLocFormat == 0) { |
| 971 | if (!decoden(uint16_decode, locaptr, locaend, loca, sizeof(*loca), |
| 972 | sf->nglyphs)) goto badloca; |
| 973 | for (i = 0; i < sf->nglyphs; i++) loca[i] *= 2; |
| 974 | } else { |
| 975 | if (!decoden(uint32_decode, locaptr, locaend, loca, sizeof(*loca), |
| 976 | sf->nglyphs)) goto badloca; |
| 977 | } |
| 978 | for (i = 1; i < sf->nglyphs; i++) { |
| 979 | if (loca[i] > glyflen) goto badloca; |
| 980 | breaks[sf->osd.numTables + i - 1] = loca[i] + glyfoff; |
| 981 | } |
| 982 | breaks[sf->osd.numTables + sf->nglyphs - 1] = sf->len; |
| 983 | qsort(breaks, sf->osd.numTables + sf->nglyphs, sizeof(*breaks), sizecmp); |
| 984 | j = lastbreak = 0; |
| 985 | for (i = 0; i < sf->len; i++) { |
| 986 | if ((i - lastbreak) % 38 == 0) fprintf(ofp, "\n"); |
| 987 | if (i == breaks[j]) { |
| 988 | while (i == breaks[j]) j++; |
| 989 | lastbreak = i; |
| 990 | fprintf(ofp, "00><\n"); |
| 991 | } |
| 992 | fprintf(ofp, "%02x", *((unsigned char *)sf->data + i)); |
| 993 | } |
| 994 | fprintf(ofp, "00>] readonly def\n"); |
| 995 | sfree(breaks); |
| 996 | fprintf(ofp, "end /%s exch definefont\n", fi->name); |
| 997 | return; |
| 998 | badloca: |
| 999 | error(err_sfntbadtable, &sf->pos, "loca"); |
| 1000 | } |
| 1001 | |
| 1002 | void sfnt_data(font_info *fi, char **bufp, size_t *lenp) { |
| 1003 | sfnt *sf = fi->fontfile; |
| 1004 | *bufp = sf->data; |
| 1005 | *lenp = sf->len; |
| 1006 | } |