| ef416fc2 |
1 | //======================================================================== |
| 2 | // |
| 3 | // FoFiTrueType.cc |
| 4 | // |
| 5 | // Copyright 1999-2003 Glyph & Cog, LLC |
| 6 | // |
| 7 | //======================================================================== |
| 8 | |
| 9 | #include <config.h> |
| 10 | |
| 11 | #ifdef USE_GCC_PRAGMAS |
| 12 | #pragma implementation |
| 13 | #endif |
| 14 | |
| 15 | #include <stdlib.h> |
| 16 | #include <string.h> |
| 17 | #include "gtypes.h" |
| 18 | #include "gmem.h" |
| 19 | #include "GString.h" |
| 20 | #include "GHash.h" |
| 21 | #include "FoFiTrueType.h" |
| 22 | |
| 23 | // |
| 24 | // Terminology |
| 25 | // ----------- |
| 26 | // |
| 27 | // character code = number used as an element of a text string |
| 28 | // |
| 29 | // character name = glyph name = name for a particular glyph within a |
| 30 | // font |
| 31 | // |
| 32 | // glyph index = GID = position (within some internal table in the font) |
| 33 | // where the instructions to draw a particular glyph are |
| 34 | // stored |
| 35 | // |
| 36 | // Type 1 fonts |
| 37 | // ------------ |
| 38 | // |
| 39 | // Type 1 fonts contain: |
| 40 | // |
| 41 | // Encoding: array of glyph names, maps char codes to glyph names |
| 42 | // |
| 43 | // Encoding[charCode] = charName |
| 44 | // |
| 45 | // CharStrings: dictionary of instructions, keyed by character names, |
| 46 | // maps character name to glyph data |
| 47 | // |
| 48 | // CharStrings[charName] = glyphData |
| 49 | // |
| 50 | // TrueType fonts |
| 51 | // -------------- |
| 52 | // |
| 53 | // TrueType fonts contain: |
| 54 | // |
| 55 | // 'cmap' table: mapping from character code to glyph index; there may |
| 56 | // be multiple cmaps in a TrueType font |
| 57 | // |
| 58 | // cmap[charCode] = gid |
| 59 | // |
| 60 | // 'post' table: mapping from glyph index to glyph name |
| 61 | // |
| 62 | // post[gid] = glyphName |
| 63 | // |
| 64 | // Type 42 fonts |
| 65 | // ------------- |
| 66 | // |
| 67 | // Type 42 fonts contain: |
| 68 | // |
| 69 | // Encoding: array of glyph names, maps char codes to glyph names |
| 70 | // |
| 71 | // Encoding[charCode] = charName |
| 72 | // |
| 73 | // CharStrings: dictionary of glyph indexes, keyed by character names, |
| 74 | // maps character name to glyph index |
| 75 | // |
| 76 | // CharStrings[charName] = gid |
| 77 | // |
| 78 | |
| 79 | //------------------------------------------------------------------------ |
| 80 | |
| 81 | #define ttcfTag 0x74746366 |
| 82 | |
| 83 | //------------------------------------------------------------------------ |
| 84 | |
| 85 | struct TrueTypeTable { |
| 86 | Guint tag; |
| 87 | Guint checksum; |
| 88 | int offset; |
| 89 | int origOffset; |
| 90 | int len; |
| 91 | }; |
| 92 | |
| 93 | struct TrueTypeCmap { |
| 94 | int platform; |
| 95 | int encoding; |
| 96 | int offset; |
| 97 | int len; |
| 98 | int fmt; |
| 99 | }; |
| 100 | |
| 101 | struct TrueTypeLoca { |
| 102 | int idx; |
| 103 | int origOffset; |
| 104 | int newOffset; |
| 105 | int len; |
| 106 | }; |
| 107 | |
| 108 | #define cmapTag 0x636d6170 |
| 109 | #define glyfTag 0x676c7966 |
| 110 | #define headTag 0x68656164 |
| 111 | #define locaTag 0x6c6f6361 |
| 112 | #define nameTag 0x6e616d65 |
| 113 | #define postTag 0x706f7374 |
| 114 | |
| 115 | static int cmpTrueTypeLocaOffset(const void *p1, const void *p2) { |
| 116 | TrueTypeLoca *loca1 = (TrueTypeLoca *)p1; |
| 117 | TrueTypeLoca *loca2 = (TrueTypeLoca *)p2; |
| 118 | |
| 119 | if (loca1->origOffset == loca2->origOffset) { |
| 120 | return loca1->idx - loca2->idx; |
| 121 | } |
| 122 | return loca1->origOffset - loca2->origOffset; |
| 123 | } |
| 124 | |
| 125 | static int cmpTrueTypeLocaIdx(const void *p1, const void *p2) { |
| 126 | TrueTypeLoca *loca1 = (TrueTypeLoca *)p1; |
| 127 | TrueTypeLoca *loca2 = (TrueTypeLoca *)p2; |
| 128 | |
| 129 | return loca1->idx - loca2->idx; |
| 130 | } |
| 131 | |
| 132 | static int cmpTrueTypeTableTag(const void *p1, const void *p2) { |
| 133 | TrueTypeTable *tab1 = (TrueTypeTable *)p1; |
| 134 | TrueTypeTable *tab2 = (TrueTypeTable *)p2; |
| 135 | |
| 136 | return (int)tab1->tag - (int)tab2->tag; |
| 137 | } |
| 138 | |
| 139 | //------------------------------------------------------------------------ |
| 140 | |
| 141 | struct T42Table { |
| 142 | char *tag; // 4-byte tag |
| 143 | GBool required; // required by the TrueType spec? |
| 144 | }; |
| 145 | |
| 146 | // TrueType tables to be embedded in Type 42 fonts. |
| 147 | // NB: the table names must be in alphabetical order here. |
| 148 | #define nT42Tables 11 |
| 149 | static T42Table t42Tables[nT42Tables] = { |
| 150 | { "cvt ", gTrue }, |
| 151 | { "fpgm", gTrue }, |
| 152 | { "glyf", gTrue }, |
| 153 | { "head", gTrue }, |
| 154 | { "hhea", gTrue }, |
| 155 | { "hmtx", gTrue }, |
| 156 | { "loca", gTrue }, |
| 157 | { "maxp", gTrue }, |
| 158 | { "prep", gTrue }, |
| 159 | { "vhea", gFalse }, |
| 160 | { "vmtx", gFalse } |
| 161 | }; |
| 162 | #define t42HeadTable 3 |
| 163 | #define t42LocaTable 6 |
| 164 | #define t42GlyfTable 2 |
| 165 | #define t42VheaTable 9 |
| 166 | #define t42VmtxTable 10 |
| 167 | |
| 168 | //------------------------------------------------------------------------ |
| 169 | |
| 170 | // Glyph names in some arbitrary standard order that Apple uses for |
| 171 | // their TrueType fonts. |
| 172 | static char *macGlyphNames[258] = { |
| 173 | ".notdef", "null", "CR", "space", |
| 174 | "exclam", "quotedbl", "numbersign", "dollar", |
| 175 | "percent", "ampersand", "quotesingle", "parenleft", |
| 176 | "parenright", "asterisk", "plus", "comma", |
| 177 | "hyphen", "period", "slash", "zero", |
| 178 | "one", "two", "three", "four", |
| 179 | "five", "six", "seven", "eight", |
| 180 | "nine", "colon", "semicolon", "less", |
| 181 | "equal", "greater", "question", "at", |
| 182 | "A", "B", "C", "D", |
| 183 | "E", "F", "G", "H", |
| 184 | "I", "J", "K", "L", |
| 185 | "M", "N", "O", "P", |
| 186 | "Q", "R", "S", "T", |
| 187 | "U", "V", "W", "X", |
| 188 | "Y", "Z", "bracketleft", "backslash", |
| 189 | "bracketright", "asciicircum", "underscore", "grave", |
| 190 | "a", "b", "c", "d", |
| 191 | "e", "f", "g", "h", |
| 192 | "i", "j", "k", "l", |
| 193 | "m", "n", "o", "p", |
| 194 | "q", "r", "s", "t", |
| 195 | "u", "v", "w", "x", |
| 196 | "y", "z", "braceleft", "bar", |
| 197 | "braceright", "asciitilde", "Adieresis", "Aring", |
| 198 | "Ccedilla", "Eacute", "Ntilde", "Odieresis", |
| 199 | "Udieresis", "aacute", "agrave", "acircumflex", |
| 200 | "adieresis", "atilde", "aring", "ccedilla", |
| 201 | "eacute", "egrave", "ecircumflex", "edieresis", |
| 202 | "iacute", "igrave", "icircumflex", "idieresis", |
| 203 | "ntilde", "oacute", "ograve", "ocircumflex", |
| 204 | "odieresis", "otilde", "uacute", "ugrave", |
| 205 | "ucircumflex", "udieresis", "dagger", "degree", |
| 206 | "cent", "sterling", "section", "bullet", |
| 207 | "paragraph", "germandbls", "registered", "copyright", |
| 208 | "trademark", "acute", "dieresis", "notequal", |
| 209 | "AE", "Oslash", "infinity", "plusminus", |
| 210 | "lessequal", "greaterequal", "yen", "mu1", |
| 211 | "partialdiff", "summation", "product", "pi", |
| 212 | "integral", "ordfeminine", "ordmasculine", "Ohm", |
| 213 | "ae", "oslash", "questiondown", "exclamdown", |
| 214 | "logicalnot", "radical", "florin", "approxequal", |
| 215 | "increment", "guillemotleft", "guillemotright", "ellipsis", |
| 216 | "nbspace", "Agrave", "Atilde", "Otilde", |
| 217 | "OE", "oe", "endash", "emdash", |
| 218 | "quotedblleft", "quotedblright", "quoteleft", "quoteright", |
| 219 | "divide", "lozenge", "ydieresis", "Ydieresis", |
| 220 | "fraction", "currency", "guilsinglleft", "guilsinglright", |
| 221 | "fi", "fl", "daggerdbl", "periodcentered", |
| 222 | "quotesinglbase", "quotedblbase", "perthousand", "Acircumflex", |
| 223 | "Ecircumflex", "Aacute", "Edieresis", "Egrave", |
| 224 | "Iacute", "Icircumflex", "Idieresis", "Igrave", |
| 225 | "Oacute", "Ocircumflex", "applelogo", "Ograve", |
| 226 | "Uacute", "Ucircumflex", "Ugrave", "dotlessi", |
| 227 | "circumflex", "tilde", "overscore", "breve", |
| 228 | "dotaccent", "ring", "cedilla", "hungarumlaut", |
| 229 | "ogonek", "caron", "Lslash", "lslash", |
| 230 | "Scaron", "scaron", "Zcaron", "zcaron", |
| 231 | "brokenbar", "Eth", "eth", "Yacute", |
| 232 | "yacute", "Thorn", "thorn", "minus", |
| 233 | "multiply", "onesuperior", "twosuperior", "threesuperior", |
| 234 | "onehalf", "onequarter", "threequarters", "franc", |
| 235 | "Gbreve", "gbreve", "Idot", "Scedilla", |
| 236 | "scedilla", "Cacute", "cacute", "Ccaron", |
| 237 | "ccaron", "dmacron" |
| 238 | }; |
| 239 | |
| 240 | //------------------------------------------------------------------------ |
| 241 | // FoFiTrueType |
| 242 | //------------------------------------------------------------------------ |
| 243 | |
| 244 | FoFiTrueType *FoFiTrueType::make(char *fileA, int lenA) { |
| 245 | FoFiTrueType *ff; |
| 246 | |
| 247 | ff = new FoFiTrueType(fileA, lenA, gFalse); |
| 248 | if (!ff->parsedOk) { |
| 249 | delete ff; |
| 250 | return NULL; |
| 251 | } |
| 252 | return ff; |
| 253 | } |
| 254 | |
| 255 | FoFiTrueType *FoFiTrueType::load(char *fileName) { |
| 256 | FoFiTrueType *ff; |
| 257 | char *fileA; |
| 258 | int lenA; |
| 259 | |
| 260 | if (!(fileA = FoFiBase::readFile(fileName, &lenA))) { |
| 261 | return NULL; |
| 262 | } |
| 263 | ff = new FoFiTrueType(fileA, lenA, gTrue); |
| 264 | if (!ff->parsedOk) { |
| 265 | delete ff; |
| 266 | return NULL; |
| 267 | } |
| 268 | return ff; |
| 269 | } |
| 270 | |
| 271 | FoFiTrueType::FoFiTrueType(char *fileA, int lenA, GBool freeFileDataA): |
| 272 | FoFiBase(fileA, lenA, freeFileDataA) |
| 273 | { |
| 274 | tables = NULL; |
| 275 | nTables = 0; |
| 276 | cmaps = NULL; |
| 277 | nCmaps = 0; |
| 278 | nameToGID = NULL; |
| 279 | parsedOk = gFalse; |
| 280 | |
| 281 | parse(); |
| 282 | } |
| 283 | |
| 284 | FoFiTrueType::~FoFiTrueType() { |
| 285 | gfree(tables); |
| 286 | gfree(cmaps); |
| 287 | if (nameToGID) { |
| 288 | delete nameToGID; |
| 289 | } |
| 290 | } |
| 291 | |
| 292 | int FoFiTrueType::getNumCmaps() { |
| 293 | return nCmaps; |
| 294 | } |
| 295 | |
| 296 | int FoFiTrueType::getCmapPlatform(int i) { |
| 297 | return cmaps[i].platform; |
| 298 | } |
| 299 | |
| 300 | int FoFiTrueType::getCmapEncoding(int i) { |
| 301 | return cmaps[i].encoding; |
| 302 | } |
| 303 | |
| 304 | int FoFiTrueType::findCmap(int platform, int encoding) { |
| 305 | int i; |
| 306 | |
| 307 | for (i = 0; i < nCmaps; ++i) { |
| 308 | if (cmaps[i].platform == platform && cmaps[i].encoding == encoding) { |
| 309 | return i; |
| 310 | } |
| 311 | } |
| 312 | return -1; |
| 313 | } |
| 314 | |
| 315 | Gushort FoFiTrueType::mapCodeToGID(int i, int c) { |
| 316 | Gushort gid; |
| 317 | int segCnt, segEnd, segStart, segDelta, segOffset; |
| 318 | int cmapFirst, cmapLen; |
| 319 | int pos, a, b, m; |
| 320 | GBool ok; |
| 321 | |
| 322 | if (i < 0 || i >= nCmaps) { |
| 323 | return 0; |
| 324 | } |
| 325 | ok = gTrue; |
| 326 | pos = cmaps[i].offset; |
| 327 | switch (cmaps[i].fmt) { |
| 328 | case 0: |
| 329 | if (c < 0 || c >= cmaps[i].len - 6) { |
| 330 | return 0; |
| 331 | } |
| 332 | gid = getU8(cmaps[i].offset + 6 + c, &ok); |
| 333 | break; |
| 334 | case 4: |
| 335 | segCnt = getU16BE(pos + 6, &ok) / 2; |
| 336 | a = -1; |
| 337 | b = segCnt - 1; |
| 338 | segEnd = getU16BE(pos + 14 + 2*b, &ok); |
| 339 | if (c > segEnd) { |
| 340 | // malformed font -- the TrueType spec requires the last segEnd |
| 341 | // to be 0xffff |
| 342 | return 0; |
| 343 | } |
| 344 | // invariant: seg[a].end < code <= seg[b].end |
| 345 | while (b - a > 1 && ok) { |
| 346 | m = (a + b) / 2; |
| 347 | segEnd = getU16BE(pos + 14 + 2*m, &ok); |
| 348 | if (segEnd < c) { |
| 349 | a = m; |
| 350 | } else { |
| 351 | b = m; |
| 352 | } |
| 353 | } |
| 354 | segStart = getU16BE(pos + 16 + 2*segCnt + 2*b, &ok); |
| 355 | segDelta = getU16BE(pos + 16 + 4*segCnt + 2*b, &ok); |
| 356 | segOffset = getU16BE(pos + 16 + 6*segCnt + 2*b, &ok); |
| 357 | if (c < segStart) { |
| 358 | return 0; |
| 359 | } |
| 360 | if (segOffset == 0) { |
| 361 | gid = (c + segDelta) & 0xffff; |
| 362 | } else { |
| 363 | gid = getU16BE(pos + 16 + 6*segCnt + 2*b + |
| 364 | segOffset + 2 * (c - segStart), &ok); |
| 365 | if (gid != 0) { |
| 366 | gid = (gid + segDelta) & 0xffff; |
| 367 | } |
| 368 | } |
| 369 | break; |
| 370 | case 6: |
| 371 | cmapFirst = getU16BE(pos + 6, &ok); |
| 372 | cmapLen = getU16BE(pos + 8, &ok); |
| 373 | if (c < cmapFirst || c >= cmapFirst + cmapLen) { |
| 374 | return 0; |
| 375 | } |
| 376 | gid = getU16BE(pos + 10 + 2 * (c - cmapFirst), &ok); |
| 377 | break; |
| 378 | default: |
| 379 | return 0; |
| 380 | } |
| 381 | if (!ok) { |
| 382 | return 0; |
| 383 | } |
| 384 | return gid; |
| 385 | } |
| 386 | |
| 387 | int FoFiTrueType::mapNameToGID(char *name) { |
| 388 | if (!nameToGID) { |
| 389 | return 0; |
| 390 | } |
| 391 | return nameToGID->lookupInt(name); |
| 392 | } |
| 393 | |
| 394 | int FoFiTrueType::getEmbeddingRights() { |
| 395 | int i, fsType; |
| 396 | GBool ok; |
| 397 | |
| 398 | if ((i = seekTable("OS/2")) < 0) { |
| 399 | return 4; |
| 400 | } |
| 401 | ok = gTrue; |
| 402 | fsType = getU16BE(tables[i].offset + 8, &ok); |
| 403 | if (!ok) { |
| 404 | return 4; |
| 405 | } |
| 406 | if (fsType & 0x0008) { |
| 407 | return 2; |
| 408 | } |
| 409 | if (fsType & 0x0004) { |
| 410 | return 1; |
| 411 | } |
| 412 | if (fsType & 0x0002) { |
| 413 | return 0; |
| 414 | } |
| 415 | return 3; |
| 416 | } |
| 417 | |
| 418 | void FoFiTrueType::convertToType42(char *psName, char **encoding, |
| 419 | Gushort *codeToGID, |
| 420 | FoFiOutputFunc outputFunc, |
| 421 | void *outputStream) { |
| 422 | char buf[512]; |
| 423 | GBool ok; |
| 424 | |
| 425 | // write the header |
| 426 | ok = gTrue; |
| 427 | sprintf(buf, "%%!PS-TrueTypeFont-%g\n", (double)getS32BE(0, &ok) / 65536.0); |
| 428 | (*outputFunc)(outputStream, buf, strlen(buf)); |
| 429 | |
| 430 | // begin the font dictionary |
| 431 | (*outputFunc)(outputStream, "10 dict begin\n", 14); |
| 432 | (*outputFunc)(outputStream, "/FontName /", 11); |
| 433 | (*outputFunc)(outputStream, psName, strlen(psName)); |
| 434 | (*outputFunc)(outputStream, " def\n", 5); |
| 435 | (*outputFunc)(outputStream, "/FontType 42 def\n", 17); |
| 436 | (*outputFunc)(outputStream, "/FontMatrix [1 0 0 1 0 0] def\n", 30); |
| 437 | sprintf(buf, "/FontBBox [%d %d %d %d] def\n", |
| 438 | bbox[0], bbox[1], bbox[2], bbox[3]); |
| 439 | (*outputFunc)(outputStream, buf, strlen(buf)); |
| 440 | (*outputFunc)(outputStream, "/PaintType 0 def\n", 17); |
| 441 | |
| 442 | // write the guts of the dictionary |
| 443 | cvtEncoding(encoding, outputFunc, outputStream); |
| 444 | cvtCharStrings(encoding, codeToGID, outputFunc, outputStream); |
| 445 | cvtSfnts(outputFunc, outputStream, NULL, gFalse); |
| 446 | |
| 447 | // end the dictionary and define the font |
| 448 | (*outputFunc)(outputStream, "FontName currentdict end definefont pop\n", 40); |
| 449 | } |
| 450 | |
| 451 | void FoFiTrueType::convertToCIDType2(char *psName, |
| 452 | Gushort *cidMap, int nCIDs, |
| 453 | GBool needVerticalMetrics, |
| 454 | FoFiOutputFunc outputFunc, |
| 455 | void *outputStream) { |
| 456 | char buf[512]; |
| 457 | Gushort cid; |
| 458 | GBool ok; |
| 459 | int i, j, k; |
| 460 | |
| 461 | // write the header |
| 462 | ok = gTrue; |
| 463 | sprintf(buf, "%%!PS-TrueTypeFont-%g\n", (double)getS32BE(0, &ok) / 65536.0); |
| 464 | (*outputFunc)(outputStream, buf, strlen(buf)); |
| 465 | |
| 466 | // begin the font dictionary |
| 467 | (*outputFunc)(outputStream, "20 dict begin\n", 14); |
| 468 | (*outputFunc)(outputStream, "/CIDFontName /", 14); |
| 469 | (*outputFunc)(outputStream, psName, strlen(psName)); |
| 470 | (*outputFunc)(outputStream, " def\n", 5); |
| 471 | (*outputFunc)(outputStream, "/CIDFontType 2 def\n", 19); |
| 472 | (*outputFunc)(outputStream, "/FontType 42 def\n", 17); |
| 473 | (*outputFunc)(outputStream, "/CIDSystemInfo 3 dict dup begin\n", 32); |
| 474 | (*outputFunc)(outputStream, " /Registry (Adobe) def\n", 24); |
| 475 | (*outputFunc)(outputStream, " /Ordering (Identity) def\n", 27); |
| 476 | (*outputFunc)(outputStream, " /Supplement 0 def\n", 20); |
| 477 | (*outputFunc)(outputStream, " end def\n", 10); |
| 478 | (*outputFunc)(outputStream, "/GDBytes 2 def\n", 15); |
| 479 | if (cidMap) { |
| 480 | sprintf(buf, "/CIDCount %d def\n", nCIDs); |
| 481 | (*outputFunc)(outputStream, buf, strlen(buf)); |
| 482 | if (nCIDs > 32767) { |
| 483 | (*outputFunc)(outputStream, "/CIDMap [", 9); |
| 484 | for (i = 0; i < nCIDs; i += 32768 - 16) { |
| 485 | (*outputFunc)(outputStream, "<\n", 2); |
| 486 | for (j = 0; j < 32768 - 16 && i+j < nCIDs; j += 16) { |
| 487 | (*outputFunc)(outputStream, " ", 2); |
| 488 | for (k = 0; k < 16 && i+j+k < nCIDs; ++k) { |
| 489 | cid = cidMap[i+j+k]; |
| 490 | sprintf(buf, "%02x%02x", (cid >> 8) & 0xff, cid & 0xff); |
| 491 | (*outputFunc)(outputStream, buf, strlen(buf)); |
| 492 | } |
| 493 | (*outputFunc)(outputStream, "\n", 1); |
| 494 | } |
| 495 | (*outputFunc)(outputStream, " >", 3); |
| 496 | } |
| 497 | (*outputFunc)(outputStream, "\n", 1); |
| 498 | (*outputFunc)(outputStream, "] def\n", 6); |
| 499 | } else { |
| 500 | (*outputFunc)(outputStream, "/CIDMap <\n", 10); |
| 501 | for (i = 0; i < nCIDs; i += 16) { |
| 502 | (*outputFunc)(outputStream, " ", 2); |
| 503 | for (j = 0; j < 16 && i+j < nCIDs; ++j) { |
| 504 | cid = cidMap[i+j]; |
| 505 | sprintf(buf, "%02x%02x", (cid >> 8) & 0xff, cid & 0xff); |
| 506 | (*outputFunc)(outputStream, buf, strlen(buf)); |
| 507 | } |
| 508 | (*outputFunc)(outputStream, "\n", 1); |
| 509 | } |
| 510 | (*outputFunc)(outputStream, "> def\n", 6); |
| 511 | } |
| 512 | } else { |
| 513 | // direct mapping - just fill the string(s) with s[i]=i |
| 514 | sprintf(buf, "/CIDCount %d def\n", nGlyphs); |
| 515 | (*outputFunc)(outputStream, buf, strlen(buf)); |
| 516 | if (nGlyphs > 32767) { |
| 517 | (*outputFunc)(outputStream, "/CIDMap [\n", 10); |
| 518 | for (i = 0; i < nGlyphs; i += 32767) { |
| 519 | j = nGlyphs - i < 32767 ? nGlyphs - i : 32767; |
| 520 | sprintf(buf, " %d string 0 1 %d {\n", 2 * j, j - 1); |
| 521 | (*outputFunc)(outputStream, buf, strlen(buf)); |
| 522 | sprintf(buf, " 2 copy dup 2 mul exch %d add -8 bitshift put\n", i); |
| 523 | (*outputFunc)(outputStream, buf, strlen(buf)); |
| 524 | sprintf(buf, " 1 index exch dup 2 mul 1 add exch %d add" |
| 525 | " 255 and put\n", i); |
| 526 | (*outputFunc)(outputStream, buf, strlen(buf)); |
| 527 | (*outputFunc)(outputStream, " } for\n", 8); |
| 528 | } |
| 529 | (*outputFunc)(outputStream, "] def\n", 6); |
| 530 | } else { |
| 531 | sprintf(buf, "/CIDMap %d string\n", 2 * nGlyphs); |
| 532 | (*outputFunc)(outputStream, buf, strlen(buf)); |
| 533 | sprintf(buf, " 0 1 %d {\n", nGlyphs - 1); |
| 534 | (*outputFunc)(outputStream, buf, strlen(buf)); |
| 535 | (*outputFunc)(outputStream, |
| 536 | " 2 copy dup 2 mul exch -8 bitshift put\n", 42); |
| 537 | (*outputFunc)(outputStream, |
| 538 | " 1 index exch dup 2 mul 1 add exch 255 and put\n", 50); |
| 539 | (*outputFunc)(outputStream, " } for\n", 8); |
| 540 | (*outputFunc)(outputStream, "def\n", 4); |
| 541 | } |
| 542 | } |
| 543 | (*outputFunc)(outputStream, "/FontMatrix [1 0 0 1 0 0] def\n", 30); |
| 544 | sprintf(buf, "/FontBBox [%d %d %d %d] def\n", |
| 545 | bbox[0], bbox[1], bbox[2], bbox[3]); |
| 546 | (*outputFunc)(outputStream, buf, strlen(buf)); |
| 547 | (*outputFunc)(outputStream, "/PaintType 0 def\n", 17); |
| 548 | (*outputFunc)(outputStream, "/Encoding [] readonly def\n", 26); |
| 549 | (*outputFunc)(outputStream, "/CharStrings 1 dict dup begin\n", 30); |
| 550 | (*outputFunc)(outputStream, " /.notdef 0 def\n", 17); |
| 551 | (*outputFunc)(outputStream, " end readonly def\n", 19); |
| 552 | |
| 553 | // write the guts of the dictionary |
| 554 | cvtSfnts(outputFunc, outputStream, NULL, needVerticalMetrics); |
| 555 | |
| 556 | // end the dictionary and define the font |
| 557 | (*outputFunc)(outputStream, |
| 558 | "CIDFontName currentdict end /CIDFont defineresource pop\n", |
| 559 | 56); |
| 560 | } |
| 561 | |
| 562 | void FoFiTrueType::convertToType0(char *psName, Gushort *cidMap, int nCIDs, |
| 563 | GBool needVerticalMetrics, |
| 564 | FoFiOutputFunc outputFunc, |
| 565 | void *outputStream) { |
| 566 | char buf[512]; |
| 567 | GString *sfntsName; |
| 568 | int n, i, j; |
| 569 | |
| 570 | // write the Type 42 sfnts array |
| 571 | sfntsName = (new GString(psName))->append("_sfnts"); |
| 572 | cvtSfnts(outputFunc, outputStream, sfntsName, needVerticalMetrics); |
| 573 | delete sfntsName; |
| 574 | |
| 575 | // write the descendant Type 42 fonts |
| 576 | n = cidMap ? nCIDs : nGlyphs; |
| 577 | for (i = 0; i < n; i += 256) { |
| 578 | (*outputFunc)(outputStream, "10 dict begin\n", 14); |
| 579 | (*outputFunc)(outputStream, "/FontName /", 11); |
| 580 | (*outputFunc)(outputStream, psName, strlen(psName)); |
| 581 | sprintf(buf, "_%02x def\n", i >> 8); |
| 582 | (*outputFunc)(outputStream, buf, strlen(buf)); |
| 583 | (*outputFunc)(outputStream, "/FontType 42 def\n", 17); |
| 584 | (*outputFunc)(outputStream, "/FontMatrix [1 0 0 1 0 0] def\n", 30); |
| 585 | sprintf(buf, "/FontBBox [%d %d %d %d] def\n", |
| 586 | bbox[0], bbox[1], bbox[2], bbox[3]); |
| 587 | (*outputFunc)(outputStream, buf, strlen(buf)); |
| 588 | (*outputFunc)(outputStream, "/PaintType 0 def\n", 17); |
| 589 | (*outputFunc)(outputStream, "/sfnts ", 7); |
| 590 | (*outputFunc)(outputStream, psName, strlen(psName)); |
| 591 | (*outputFunc)(outputStream, "_sfnts def\n", 11); |
| 592 | (*outputFunc)(outputStream, "/Encoding 256 array\n", 20); |
| 593 | for (j = 0; j < 256 && i+j < n; ++j) { |
| 594 | sprintf(buf, "dup %d /c%02x put\n", j, j); |
| 595 | (*outputFunc)(outputStream, buf, strlen(buf)); |
| 596 | } |
| 597 | (*outputFunc)(outputStream, "readonly def\n", 13); |
| 598 | (*outputFunc)(outputStream, "/CharStrings 257 dict dup begin\n", 32); |
| 599 | (*outputFunc)(outputStream, "/.notdef 0 def\n", 15); |
| 600 | for (j = 0; j < 256 && i+j < n; ++j) { |
| 601 | sprintf(buf, "/c%02x %d def\n", j, cidMap ? cidMap[i+j] : i+j); |
| 602 | (*outputFunc)(outputStream, buf, strlen(buf)); |
| 603 | } |
| 604 | (*outputFunc)(outputStream, "end readonly def\n", 17); |
| 605 | (*outputFunc)(outputStream, |
| 606 | "FontName currentdict end definefont pop\n", 40); |
| 607 | } |
| 608 | |
| 609 | // write the Type 0 parent font |
| 610 | (*outputFunc)(outputStream, "16 dict begin\n", 14); |
| 611 | (*outputFunc)(outputStream, "/FontName /", 11); |
| 612 | (*outputFunc)(outputStream, psName, strlen(psName)); |
| 613 | (*outputFunc)(outputStream, " def\n", 5); |
| 614 | (*outputFunc)(outputStream, "/FontType 0 def\n", 16); |
| 615 | (*outputFunc)(outputStream, "/FontMatrix [1 0 0 1 0 0] def\n", 30); |
| 616 | (*outputFunc)(outputStream, "/FMapType 2 def\n", 16); |
| 617 | (*outputFunc)(outputStream, "/Encoding [\n", 12); |
| 618 | for (i = 0; i < n; i += 256) { |
| 619 | sprintf(buf, "%d\n", i >> 8); |
| 620 | (*outputFunc)(outputStream, buf, strlen(buf)); |
| 621 | } |
| 622 | (*outputFunc)(outputStream, "] def\n", 6); |
| 623 | (*outputFunc)(outputStream, "/FDepVector [\n", 14); |
| 624 | for (i = 0; i < n; i += 256) { |
| 625 | (*outputFunc)(outputStream, "/", 1); |
| 626 | (*outputFunc)(outputStream, psName, strlen(psName)); |
| 627 | sprintf(buf, "_%02x findfont\n", i >> 8); |
| 628 | (*outputFunc)(outputStream, buf, strlen(buf)); |
| 629 | } |
| 630 | (*outputFunc)(outputStream, "] def\n", 6); |
| 631 | (*outputFunc)(outputStream, "FontName currentdict end definefont pop\n", 40); |
| 632 | } |
| 633 | |
| 634 | void FoFiTrueType::writeTTF(FoFiOutputFunc outputFunc, |
| 635 | void *outputStream, char *name, |
| 636 | Gushort *codeToGID) { |
| 637 | // this substitute cmap table maps char codes 0000-ffff directly to |
| 638 | // glyphs 0000-ffff |
| 639 | static char cmapTab[36] = { |
| 640 | 0, 0, // table version number |
| 641 | 0, 1, // number of encoding tables |
| 642 | 0, 1, // platform ID |
| 643 | 0, 0, // encoding ID |
| 644 | 0, 0, 0, 12, // offset of subtable |
| 645 | 0, 4, // subtable format |
| 646 | 0, 24, // subtable length |
| 647 | 0, 0, // subtable version |
| 648 | 0, 2, // segment count * 2 |
| 649 | 0, 2, // 2 * 2 ^ floor(log2(segCount)) |
| 650 | 0, 0, // floor(log2(segCount)) |
| 651 | 0, 0, // 2*segCount - 2*2^floor(log2(segCount)) |
| 652 | (char)0xff, (char)0xff, // endCount[0] |
| 653 | 0, 0, // reserved |
| 654 | 0, 0, // startCount[0] |
| 655 | 0, 0, // idDelta[0] |
| 656 | 0, 0 // pad to a mulitple of four bytes |
| 657 | }; |
| 658 | static char nameTab[8] = { |
| 659 | 0, 0, // format |
| 660 | 0, 0, // number of name records |
| 661 | 0, 6, // offset to start of string storage |
| 662 | 0, 0 // pad to multiple of four bytes |
| 663 | }; |
| 664 | static char postTab[32] = { |
| 665 | 0, 1, 0, 0, // format |
| 666 | 0, 0, 0, 0, // italic angle |
| 667 | 0, 0, // underline position |
| 668 | 0, 0, // underline thickness |
| 669 | 0, 0, 0, 0, // fixed pitch |
| 670 | 0, 0, 0, 0, // min Type 42 memory |
| 671 | 0, 0, 0, 0, // max Type 42 memory |
| 672 | 0, 0, 0, 0, // min Type 1 memory |
| 673 | 0, 0, 0, 0 // max Type 1 memory |
| 674 | }; |
| 675 | GBool missingCmap, missingName, missingPost, unsortedLoca, badCmapLen; |
| 676 | int nZeroLengthTables; |
| 677 | TrueTypeLoca *locaTable; |
| 678 | TrueTypeTable *newTables; |
| 679 | char *newNameTab, *newCmapTab; |
| 680 | int nNewTables, cmapIdx, cmapLen, glyfLen, newNameLen, newCmapLen, next; |
| 681 | Guint locaChecksum, glyfChecksum, fileChecksum; |
| 682 | char *tableDir; |
| 683 | char locaBuf[4], checksumBuf[4]; |
| 684 | GBool ok; |
| 685 | Guint t; |
| 686 | int pos, i, j, k, n; |
| 687 | |
| 688 | // check for missing tables |
| 689 | missingCmap = (cmapIdx = seekTable("cmap")) < 0; |
| 690 | missingName = seekTable("name") < 0; |
| 691 | missingPost = seekTable("post") < 0; |
| 692 | |
| 693 | // read the loca table, check to see if it's sorted |
| 694 | locaTable = (TrueTypeLoca *)gmallocn(nGlyphs + 1, sizeof(TrueTypeLoca)); |
| 695 | unsortedLoca = gFalse; |
| 696 | i = seekTable("loca"); |
| 697 | pos = tables[i].offset; |
| 698 | ok = gTrue; |
| 699 | for (i = 0; i <= nGlyphs; ++i) { |
| 700 | if (locaFmt) { |
| 701 | locaTable[i].origOffset = (int)getU32BE(pos + i*4, &ok); |
| 702 | } else { |
| 703 | locaTable[i].origOffset = 2 * getU16BE(pos + i*2, &ok); |
| 704 | } |
| 705 | if (i > 0 && locaTable[i].origOffset < locaTable[i-1].origOffset) { |
| 706 | unsortedLoca = gTrue; |
| 707 | } |
| 708 | locaTable[i].idx = i; |
| 709 | } |
| 710 | |
| 711 | // check for zero-length tables |
| 712 | nZeroLengthTables = 0; |
| 713 | for (i = 0; i < nTables; ++i) { |
| 714 | if (tables[i].len == 0) { |
| 715 | ++nZeroLengthTables; |
| 716 | } |
| 717 | } |
| 718 | |
| 719 | // check for an incorrect cmap table length |
| 720 | badCmapLen = gFalse; |
| 721 | cmapLen = 0; // make gcc happy |
| 722 | if (!missingCmap) { |
| 723 | cmapLen = cmaps[0].offset + cmaps[0].len; |
| 724 | for (i = 1; i < nCmaps; ++i) { |
| 725 | if (cmaps[i].offset + cmaps[i].len > cmapLen) { |
| 726 | cmapLen = cmaps[i].offset + cmaps[i].len; |
| 727 | } |
| 728 | } |
| 729 | cmapLen -= tables[cmapIdx].offset; |
| 730 | if (cmapLen > tables[cmapIdx].len) { |
| 731 | badCmapLen = gTrue; |
| 732 | } |
| 733 | } |
| 734 | |
| 735 | // if nothing is broken, just write the TTF file as is |
| 736 | if (!missingCmap && !missingName && !missingPost && !unsortedLoca && |
| 737 | !badCmapLen && nZeroLengthTables == 0 && !name && !codeToGID) { |
| 738 | (*outputFunc)(outputStream, (char *)file, len); |
| 739 | goto done1; |
| 740 | } |
| 741 | |
| 742 | // sort the 'loca' table: some (non-compliant) fonts have |
| 743 | // out-of-order loca tables; in order to correctly handle the case |
| 744 | // where (compliant) fonts have empty entries in the middle of the |
| 745 | // table, cmpTrueTypeLocaOffset uses offset as its primary sort key, |
| 746 | // and idx as its secondary key (ensuring that adjacent entries with |
| 747 | // the same pos value remain in the same order) |
| 748 | glyfLen = 0; // make gcc happy |
| 749 | if (unsortedLoca) { |
| 750 | qsort(locaTable, nGlyphs + 1, sizeof(TrueTypeLoca), |
| 751 | &cmpTrueTypeLocaOffset); |
| 752 | for (i = 0; i < nGlyphs; ++i) { |
| 753 | locaTable[i].len = locaTable[i+1].origOffset - locaTable[i].origOffset; |
| 754 | } |
| 755 | locaTable[nGlyphs].len = 0; |
| 756 | qsort(locaTable, nGlyphs + 1, sizeof(TrueTypeLoca), |
| 757 | &cmpTrueTypeLocaIdx); |
| 758 | pos = 0; |
| 759 | for (i = 0; i <= nGlyphs; ++i) { |
| 760 | locaTable[i].newOffset = pos; |
| 761 | pos += locaTable[i].len; |
| 762 | if (pos & 3) { |
| 763 | pos += 4 - (pos & 3); |
| 764 | } |
| 765 | } |
| 766 | glyfLen = pos; |
| 767 | } |
| 768 | |
| 769 | // compute checksums for the loca and glyf tables |
| 770 | locaChecksum = glyfChecksum = 0; |
| 771 | if (unsortedLoca) { |
| 772 | if (locaFmt) { |
| 773 | for (j = 0; j <= nGlyphs; ++j) { |
| 774 | locaChecksum += locaTable[j].newOffset; |
| 775 | } |
| 776 | } else { |
| 777 | for (j = 0; j <= nGlyphs; j += 2) { |
| 778 | locaChecksum += locaTable[j].newOffset << 16; |
| 779 | if (j + 1 <= nGlyphs) { |
| 780 | locaChecksum += locaTable[j+1].newOffset; |
| 781 | } |
| 782 | } |
| 783 | } |
| 784 | pos = tables[seekTable("glyf")].offset; |
| 785 | for (j = 0; j < nGlyphs; ++j) { |
| 786 | n = locaTable[j].len; |
| 787 | if (n > 0) { |
| 788 | k = locaTable[j].origOffset; |
| 789 | if (checkRegion(pos + k, n)) { |
| 790 | glyfChecksum += computeTableChecksum(file + pos + k, n); |
| 791 | } |
| 792 | } |
| 793 | } |
| 794 | } |
| 795 | |
| 796 | // construct the new name table |
| 797 | if (name) { |
| 798 | n = strlen(name); |
| 799 | newNameLen = (6 + 4*12 + 2 * (3*n + 7) + 3) & ~3; |
| 800 | newNameTab = (char *)gmalloc(newNameLen); |
| 801 | memset(newNameTab, 0, newNameLen); |
| 802 | newNameTab[0] = 0; // format selector |
| 803 | newNameTab[1] = 0; |
| 804 | newNameTab[2] = 0; // number of name records |
| 805 | newNameTab[3] = 4; |
| 806 | newNameTab[4] = 0; // offset to start of string storage |
| 807 | newNameTab[5] = 6 + 4*12; |
| 808 | next = 0; |
| 809 | for (i = 0; i < 4; ++i) { |
| 810 | newNameTab[6 + i*12 + 0] = 0; // platform ID = Microsoft |
| 811 | newNameTab[6 + i*12 + 1] = 3; |
| 812 | newNameTab[6 + i*12 + 2] = 0; // encoding ID = Unicode |
| 813 | newNameTab[6 + i*12 + 3] = 1; |
| 814 | newNameTab[6 + i*12 + 4] = 0x04; // language ID = American English |
| 815 | newNameTab[6 + i*12 + 5] = 0x09; |
| 816 | newNameTab[6 + i*12 + 6] = 0; // name ID |
| 817 | newNameTab[6 + i*12 + 7] = i + 1; |
| 818 | newNameTab[6 + i*12 + 8] = i+1 == 2 ? 0 : ((2*n) >> 8); // string length |
| 819 | newNameTab[6 + i*12 + 9] = i+1 == 2 ? 14 : ((2*n) & 0xff); |
| 820 | newNameTab[6 + i*12 + 10] = next >> 8; // string offset |
| 821 | newNameTab[6 + i*12 + 11] = next & 0xff; |
| 822 | if (i+1 == 2) { |
| 823 | memcpy(newNameTab + 6 + 4*12 + next, "\0R\0e\0g\0u\0l\0a\0r", 14); |
| 824 | next += 14; |
| 825 | } else { |
| 826 | for (j = 0; j < n; ++j) { |
| 827 | newNameTab[6 + 4*12 + next + 2*j] = 0; |
| 828 | newNameTab[6 + 4*12 + next + 2*j + 1] = name[j]; |
| 829 | } |
| 830 | next += 2*n; |
| 831 | } |
| 832 | } |
| 833 | } else { |
| 834 | newNameLen = 0; |
| 835 | newNameTab = NULL; |
| 836 | } |
| 837 | |
| 838 | // construct the new cmap table |
| 839 | if (codeToGID) { |
| 840 | newCmapLen = 44 + 256 * 2; |
| 841 | newCmapTab = (char *)gmalloc(newCmapLen); |
| 842 | newCmapTab[0] = 0; // table version number = 0 |
| 843 | newCmapTab[1] = 0; |
| 844 | newCmapTab[2] = 0; // number of encoding tables = 1 |
| 845 | newCmapTab[3] = 1; |
| 846 | newCmapTab[4] = 0; // platform ID = Microsoft |
| 847 | newCmapTab[5] = 3; |
| 848 | newCmapTab[6] = 0; // encoding ID = Unicode |
| 849 | newCmapTab[7] = 1; |
| 850 | newCmapTab[8] = 0; // offset of subtable |
| 851 | newCmapTab[9] = 0; |
| 852 | newCmapTab[10] = 0; |
| 853 | newCmapTab[11] = 12; |
| 854 | newCmapTab[12] = 0; // subtable format = 4 |
| 855 | newCmapTab[13] = 4; |
| 856 | newCmapTab[14] = 0x02; // subtable length |
| 857 | newCmapTab[15] = 0x20; |
| 858 | newCmapTab[16] = 0; // subtable version = 0 |
| 859 | newCmapTab[17] = 0; |
| 860 | newCmapTab[18] = 0; // segment count * 2 |
| 861 | newCmapTab[19] = 4; |
| 862 | newCmapTab[20] = 0; // 2 * 2 ^ floor(log2(segCount)) |
| 863 | newCmapTab[21] = 4; |
| 864 | newCmapTab[22] = 0; // floor(log2(segCount)) |
| 865 | newCmapTab[23] = 1; |
| 866 | newCmapTab[24] = 0; // 2*segCount - 2*2^floor(log2(segCount)) |
| 867 | newCmapTab[25] = 0; |
| 868 | newCmapTab[26] = 0x00; // endCount[0] |
| 869 | newCmapTab[27] = (char)0xff; |
| 870 | newCmapTab[28] = (char)0xff; // endCount[1] |
| 871 | newCmapTab[29] = (char)0xff; |
| 872 | newCmapTab[30] = 0; // reserved |
| 873 | newCmapTab[31] = 0; |
| 874 | newCmapTab[32] = 0x00; // startCount[0] |
| 875 | newCmapTab[33] = 0x00; |
| 876 | newCmapTab[34] = (char)0xff; // startCount[1] |
| 877 | newCmapTab[35] = (char)0xff; |
| 878 | newCmapTab[36] = 0; // idDelta[0] |
| 879 | newCmapTab[37] = 0; |
| 880 | newCmapTab[38] = 0; // idDelta[1] |
| 881 | newCmapTab[39] = 1; |
| 882 | newCmapTab[40] = 0; // idRangeOffset[0] |
| 883 | newCmapTab[41] = 4; |
| 884 | newCmapTab[42] = 0; // idRangeOffset[1] |
| 885 | newCmapTab[43] = 0; |
| 886 | for (i = 0; i < 256; ++i) { |
| 887 | newCmapTab[44 + 2*i] = codeToGID[i] >> 8; |
| 888 | newCmapTab[44 + 2*i + 1] = codeToGID[i] & 0xff; |
| 889 | } |
| 890 | } else { |
| 891 | newCmapLen = 0; |
| 892 | newCmapTab = NULL; |
| 893 | } |
| 894 | |
| 895 | // construct the new table directory: |
| 896 | // - keep all original tables with non-zero length |
| 897 | // - fix the cmap table's length, if necessary |
| 898 | // - add missing tables |
| 899 | // - sort the table by tag |
| 900 | // - compute new table positions, including 4-byte alignment |
| 901 | // - (re)compute table checksums |
| 902 | nNewTables = nTables - nZeroLengthTables + |
| 903 | (missingCmap ? 1 : 0) + (missingName ? 1 : 0) + |
| 904 | (missingPost ? 1 : 0); |
| 905 | newTables = (TrueTypeTable *)gmallocn(nNewTables, sizeof(TrueTypeTable)); |
| 906 | j = 0; |
| 907 | for (i = 0; i < nTables; ++i) { |
| 908 | if (tables[i].len > 0) { |
| 909 | newTables[j] = tables[i]; |
| 910 | newTables[j].origOffset = tables[i].offset; |
| 911 | if (checkRegion(tables[i].offset, newTables[i].len)) { |
| 912 | newTables[j].checksum = |
| 913 | computeTableChecksum(file + tables[i].offset, tables[i].len); |
| 914 | if (tables[i].tag == headTag) { |
| 915 | // don't include the file checksum |
| 916 | newTables[j].checksum -= getU32BE(tables[i].offset + 8, &ok); |
| 917 | } |
| 918 | } |
| 919 | if (newTables[j].tag == cmapTag && codeToGID) { |
| 920 | newTables[j].len = newCmapLen; |
| 921 | newTables[j].checksum = computeTableChecksum((Guchar *)newCmapTab, |
| 922 | newCmapLen); |
| 923 | } else if (newTables[j].tag == cmapTag && badCmapLen) { |
| 924 | newTables[j].len = cmapLen; |
| 925 | } else if (newTables[j].tag == locaTag && unsortedLoca) { |
| 926 | newTables[j].len = (nGlyphs + 1) * (locaFmt ? 4 : 2); |
| 927 | newTables[j].checksum = locaChecksum; |
| 928 | } else if (newTables[j].tag == glyfTag && unsortedLoca) { |
| 929 | newTables[j].len = glyfLen; |
| 930 | newTables[j].checksum = glyfChecksum; |
| 931 | } else if (newTables[j].tag == nameTag && name) { |
| 932 | newTables[j].len = newNameLen; |
| 933 | newTables[j].checksum = computeTableChecksum((Guchar *)newNameTab, |
| 934 | newNameLen); |
| 935 | } |
| 936 | ++j; |
| 937 | } |
| 938 | } |
| 939 | if (missingCmap) { |
| 940 | newTables[j].tag = cmapTag; |
| 941 | if (codeToGID) { |
| 942 | newTables[j].checksum = computeTableChecksum((Guchar *)newCmapTab, |
| 943 | newCmapLen); |
| 944 | newTables[j].len = newCmapLen; |
| 945 | } else { |
| 946 | newTables[j].checksum = computeTableChecksum((Guchar *)cmapTab, |
| 947 | sizeof(cmapTab)); |
| 948 | newTables[j].len = sizeof(cmapTab); |
| 949 | } |
| 950 | ++j; |
| 951 | } |
| 952 | if (missingName) { |
| 953 | newTables[j].tag = nameTag; |
| 954 | if (name) { |
| 955 | newTables[j].checksum = computeTableChecksum((Guchar *)newNameTab, |
| 956 | newNameLen); |
| 957 | newTables[j].len = newNameLen; |
| 958 | } else { |
| 959 | newTables[j].checksum = computeTableChecksum((Guchar *)nameTab, |
| 960 | sizeof(nameTab)); |
| 961 | newTables[j].len = sizeof(nameTab); |
| 962 | } |
| 963 | ++j; |
| 964 | } |
| 965 | if (missingPost) { |
| 966 | newTables[j].tag = postTag; |
| 967 | newTables[j].checksum = computeTableChecksum((Guchar *)postTab, |
| 968 | sizeof(postTab)); |
| 969 | newTables[j].len = sizeof(postTab); |
| 970 | ++j; |
| 971 | } |
| 972 | qsort(newTables, nNewTables, sizeof(TrueTypeTable), |
| 973 | &cmpTrueTypeTableTag); |
| 974 | pos = 12 + nNewTables * 16; |
| 975 | for (i = 0; i < nNewTables; ++i) { |
| 976 | newTables[i].offset = pos; |
| 977 | pos += newTables[i].len; |
| 978 | if (pos & 3) { |
| 979 | pos += 4 - (pos & 3); |
| 980 | } |
| 981 | } |
| 982 | |
| 983 | // write the table directory |
| 984 | tableDir = (char *)gmalloc(12 + nNewTables * 16); |
| 985 | tableDir[0] = 0x00; // sfnt version |
| 986 | tableDir[1] = 0x01; |
| 987 | tableDir[2] = 0x00; |
| 988 | tableDir[3] = 0x00; |
| 989 | tableDir[4] = (char)((nNewTables >> 8) & 0xff); // numTables |
| 990 | tableDir[5] = (char)(nNewTables & 0xff); |
| 991 | for (i = -1, t = (Guint)nNewTables; t; ++i, t >>= 1) ; |
| 992 | t = 1 << (4 + i); |
| 993 | tableDir[6] = (char)((t >> 8) & 0xff); // searchRange |
| 994 | tableDir[7] = (char)(t & 0xff); |
| 995 | tableDir[8] = (char)((i >> 8) & 0xff); // entrySelector |
| 996 | tableDir[9] = (char)(i & 0xff); |
| 997 | t = nNewTables * 16 - t; |
| 998 | tableDir[10] = (char)((t >> 8) & 0xff); // rangeShift |
| 999 | tableDir[11] = (char)(t & 0xff); |
| 1000 | pos = 12; |
| 1001 | for (i = 0; i < nNewTables; ++i) { |
| 1002 | tableDir[pos ] = (char)(newTables[i].tag >> 24); |
| 1003 | tableDir[pos+ 1] = (char)(newTables[i].tag >> 16); |
| 1004 | tableDir[pos+ 2] = (char)(newTables[i].tag >> 8); |
| 1005 | tableDir[pos+ 3] = (char) newTables[i].tag; |
| 1006 | tableDir[pos+ 4] = (char)(newTables[i].checksum >> 24); |
| 1007 | tableDir[pos+ 5] = (char)(newTables[i].checksum >> 16); |
| 1008 | tableDir[pos+ 6] = (char)(newTables[i].checksum >> 8); |
| 1009 | tableDir[pos+ 7] = (char) newTables[i].checksum; |
| 1010 | tableDir[pos+ 8] = (char)(newTables[i].offset >> 24); |
| 1011 | tableDir[pos+ 9] = (char)(newTables[i].offset >> 16); |
| 1012 | tableDir[pos+10] = (char)(newTables[i].offset >> 8); |
| 1013 | tableDir[pos+11] = (char) newTables[i].offset; |
| 1014 | tableDir[pos+12] = (char)(newTables[i].len >> 24); |
| 1015 | tableDir[pos+13] = (char)(newTables[i].len >> 16); |
| 1016 | tableDir[pos+14] = (char)(newTables[i].len >> 8); |
| 1017 | tableDir[pos+15] = (char) newTables[i].len; |
| 1018 | pos += 16; |
| 1019 | } |
| 1020 | (*outputFunc)(outputStream, tableDir, 12 + nNewTables * 16); |
| 1021 | |
| 1022 | // compute the file checksum |
| 1023 | fileChecksum = computeTableChecksum((Guchar *)tableDir, |
| 1024 | 12 + nNewTables * 16); |
| 1025 | for (i = 0; i < nNewTables; ++i) { |
| 1026 | fileChecksum += newTables[i].checksum; |
| 1027 | } |
| 1028 | fileChecksum = 0xb1b0afba - fileChecksum; |
| 1029 | |
| 1030 | // write the tables |
| 1031 | for (i = 0; i < nNewTables; ++i) { |
| 1032 | if (newTables[i].tag == headTag) { |
| 1033 | if (checkRegion(newTables[i].origOffset, newTables[i].len)) { |
| 1034 | (*outputFunc)(outputStream, (char *)file + newTables[i].origOffset, 8); |
| 1035 | checksumBuf[0] = fileChecksum >> 24; |
| 1036 | checksumBuf[1] = fileChecksum >> 16; |
| 1037 | checksumBuf[2] = fileChecksum >> 8; |
| 1038 | checksumBuf[3] = fileChecksum; |
| 1039 | (*outputFunc)(outputStream, checksumBuf, 4); |
| 1040 | (*outputFunc)(outputStream, |
| 1041 | (char *)file + newTables[i].origOffset + 12, |
| 1042 | newTables[i].len - 12); |
| 1043 | } else { |
| 1044 | for (j = 0; j < newTables[i].len; ++j) { |
| 1045 | (*outputFunc)(outputStream, "\0", 1); |
| 1046 | } |
| 1047 | } |
| 1048 | } else if (newTables[i].tag == cmapTag && codeToGID) { |
| 1049 | (*outputFunc)(outputStream, newCmapTab, newTables[i].len); |
| 1050 | } else if (newTables[i].tag == cmapTag && missingCmap) { |
| 1051 | (*outputFunc)(outputStream, cmapTab, newTables[i].len); |
| 1052 | } else if (newTables[i].tag == nameTag && name) { |
| 1053 | (*outputFunc)(outputStream, newNameTab, newTables[i].len); |
| 1054 | } else if (newTables[i].tag == nameTag && missingName) { |
| 1055 | (*outputFunc)(outputStream, nameTab, newTables[i].len); |
| 1056 | } else if (newTables[i].tag == postTag && missingPost) { |
| 1057 | (*outputFunc)(outputStream, postTab, newTables[i].len); |
| 1058 | } else if (newTables[i].tag == locaTag && unsortedLoca) { |
| 1059 | for (j = 0; j <= nGlyphs; ++j) { |
| 1060 | if (locaFmt) { |
| 1061 | locaBuf[0] = (char)(locaTable[j].newOffset >> 24); |
| 1062 | locaBuf[1] = (char)(locaTable[j].newOffset >> 16); |
| 1063 | locaBuf[2] = (char)(locaTable[j].newOffset >> 8); |
| 1064 | locaBuf[3] = (char) locaTable[j].newOffset; |
| 1065 | (*outputFunc)(outputStream, locaBuf, 4); |
| 1066 | } else { |
| 1067 | locaBuf[0] = (char)(locaTable[j].newOffset >> 9); |
| 1068 | locaBuf[1] = (char)(locaTable[j].newOffset >> 1); |
| 1069 | (*outputFunc)(outputStream, locaBuf, 2); |
| 1070 | } |
| 1071 | } |
| 1072 | } else if (newTables[i].tag == glyfTag && unsortedLoca) { |
| 1073 | pos = tables[seekTable("glyf")].offset; |
| 1074 | for (j = 0; j < nGlyphs; ++j) { |
| 1075 | n = locaTable[j].len; |
| 1076 | if (n > 0) { |
| 1077 | k = locaTable[j].origOffset; |
| 1078 | if (checkRegion(pos + k, n)) { |
| 1079 | (*outputFunc)(outputStream, (char *)file + pos + k, n); |
| 1080 | } else { |
| 1081 | for (k = 0; k < n; ++k) { |
| 1082 | (*outputFunc)(outputStream, "\0", 1); |
| 1083 | } |
| 1084 | } |
| 1085 | if ((k = locaTable[j].len & 3)) { |
| 1086 | (*outputFunc)(outputStream, "\0\0\0\0", 4 - k); |
| 1087 | } |
| 1088 | } |
| 1089 | } |
| 1090 | } else { |
| 1091 | if (checkRegion(newTables[i].origOffset, newTables[i].len)) { |
| 1092 | (*outputFunc)(outputStream, (char *)file + newTables[i].origOffset, |
| 1093 | newTables[i].len); |
| 1094 | } else { |
| 1095 | for (j = 0; j < newTables[i].len; ++j) { |
| 1096 | (*outputFunc)(outputStream, "\0", 1); |
| 1097 | } |
| 1098 | } |
| 1099 | } |
| 1100 | if (newTables[i].len & 3) { |
| 1101 | (*outputFunc)(outputStream, "\0\0\0", 4 - (newTables[i].len & 3)); |
| 1102 | } |
| 1103 | } |
| 1104 | |
| 1105 | gfree(newCmapTab); |
| 1106 | gfree(newNameTab); |
| 1107 | gfree(tableDir); |
| 1108 | gfree(newTables); |
| 1109 | done1: |
| 1110 | gfree(locaTable); |
| 1111 | } |
| 1112 | |
| 1113 | void FoFiTrueType::cvtEncoding(char **encoding, |
| 1114 | FoFiOutputFunc outputFunc, |
| 1115 | void *outputStream) { |
| 1116 | char *name; |
| 1117 | char buf[64]; |
| 1118 | int i; |
| 1119 | |
| 1120 | (*outputFunc)(outputStream, "/Encoding 256 array\n", 20); |
| 1121 | if (encoding) { |
| 1122 | for (i = 0; i < 256; ++i) { |
| 1123 | if (!(name = encoding[i])) { |
| 1124 | name = ".notdef"; |
| 1125 | } |
| 1126 | sprintf(buf, "dup %d /", i); |
| 1127 | (*outputFunc)(outputStream, buf, strlen(buf)); |
| 1128 | (*outputFunc)(outputStream, name, strlen(name)); |
| 1129 | (*outputFunc)(outputStream, " put\n", 5); |
| 1130 | } |
| 1131 | } else { |
| 1132 | for (i = 0; i < 256; ++i) { |
| 1133 | sprintf(buf, "dup %d /c%02x put\n", i, i); |
| 1134 | (*outputFunc)(outputStream, buf, strlen(buf)); |
| 1135 | } |
| 1136 | } |
| 1137 | (*outputFunc)(outputStream, "readonly def\n", 13); |
| 1138 | } |
| 1139 | |
| 1140 | void FoFiTrueType::cvtCharStrings(char **encoding, |
| 1141 | Gushort *codeToGID, |
| 1142 | FoFiOutputFunc outputFunc, |
| 1143 | void *outputStream) { |
| 1144 | char *name; |
| 1145 | char buf[64], buf2[16]; |
| 1146 | int i, k; |
| 1147 | |
| 1148 | // always define '.notdef' |
| 1149 | (*outputFunc)(outputStream, "/CharStrings 256 dict dup begin\n", 32); |
| 1150 | (*outputFunc)(outputStream, "/.notdef 0 def\n", 15); |
| 1151 | |
| 1152 | // if there's no 'cmap' table, punt |
| 1153 | if (nCmaps == 0) { |
| 1154 | goto err; |
| 1155 | } |
| 1156 | |
| 1157 | // map char name to glyph index: |
| 1158 | // 1. use encoding to map name to char code |
| 1159 | // 2. use codeToGID to map char code to glyph index |
| 1160 | // N.B. We do this in reverse order because font subsets can have |
| 1161 | // weird encodings that use the same character name twice, and |
| 1162 | // the first definition is probably the one we want. |
| 1163 | k = 0; // make gcc happy |
| 1164 | for (i = 255; i >= 0; --i) { |
| 1165 | if (encoding) { |
| 1166 | name = encoding[i]; |
| 1167 | } else { |
| 1168 | sprintf(buf2, "c%02x", i); |
| 1169 | name = buf2; |
| 1170 | } |
| 1171 | if (name && strcmp(name, ".notdef")) { |
| 1172 | k = codeToGID[i]; |
| 1173 | // note: Distiller (maybe Adobe's PS interpreter in general) |
| 1174 | // doesn't like TrueType fonts that have CharStrings entries |
| 1175 | // which point to nonexistent glyphs, hence the (k < nGlyphs) |
| 1176 | // test |
| 1177 | if (k > 0 && k < nGlyphs) { |
| 1178 | (*outputFunc)(outputStream, "/", 1); |
| 1179 | (*outputFunc)(outputStream, name, strlen(name)); |
| 1180 | sprintf(buf, " %d def\n", k); |
| 1181 | (*outputFunc)(outputStream, buf, strlen(buf)); |
| 1182 | } |
| 1183 | } |
| 1184 | } |
| 1185 | |
| 1186 | err: |
| 1187 | (*outputFunc)(outputStream, "end readonly def\n", 17); |
| 1188 | } |
| 1189 | |
| 1190 | void FoFiTrueType::cvtSfnts(FoFiOutputFunc outputFunc, |
| 1191 | void *outputStream, GString *name, |
| 1192 | GBool needVerticalMetrics) { |
| 1193 | Guchar headData[54]; |
| 1194 | TrueTypeLoca *locaTable; |
| 1195 | Guchar *locaData; |
| 1196 | TrueTypeTable newTables[nT42Tables]; |
| 1197 | Guchar tableDir[12 + nT42Tables*16]; |
| 1198 | GBool ok; |
| 1199 | Guint checksum; |
| 1200 | int nNewTables; |
| 1201 | int length, pos, glyfPos, i, j, k; |
| 1202 | Guchar vheaTab[36] = { |
| 1203 | 0, 1, 0, 0, // table version number |
| 1204 | 0, 0, // ascent |
| 1205 | 0, 0, // descent |
| 1206 | 0, 0, // reserved |
| 1207 | 0, 0, // max advance height |
| 1208 | 0, 0, // min top side bearing |
| 1209 | 0, 0, // min bottom side bearing |
| 1210 | 0, 0, // y max extent |
| 1211 | 0, 0, // caret slope rise |
| 1212 | 0, 1, // caret slope run |
| 1213 | 0, 0, // caret offset |
| 1214 | 0, 0, // reserved |
| 1215 | 0, 0, // reserved |
| 1216 | 0, 0, // reserved |
| 1217 | 0, 0, // reserved |
| 1218 | 0, 0, // metric data format |
| 1219 | 0, 1 // number of advance heights in vmtx table |
| 1220 | }; |
| 1221 | Guchar *vmtxTab; |
| 1222 | GBool needVhea, needVmtx; |
| 1223 | int advance; |
| 1224 | |
| 1225 | // construct the 'head' table, zero out the font checksum |
| 1226 | i = seekTable("head"); |
| 1227 | pos = tables[i].offset; |
| 1228 | if (!checkRegion(pos, 54)) { |
| 1229 | return; |
| 1230 | } |
| 1231 | memcpy(headData, file + pos, 54); |
| 1232 | headData[8] = headData[9] = headData[10] = headData[11] = (Guchar)0; |
| 1233 | |
| 1234 | // read the original 'loca' table, pad entries out to 4 bytes, and |
| 1235 | // sort it into proper order -- some (non-compliant) fonts have |
| 1236 | // out-of-order loca tables; in order to correctly handle the case |
| 1237 | // where (compliant) fonts have empty entries in the middle of the |
| 1238 | // table, cmpTrueTypeLocaPos uses offset as its primary sort key, |
| 1239 | // and idx as its secondary key (ensuring that adjacent entries with |
| 1240 | // the same pos value remain in the same order) |
| 1241 | locaTable = (TrueTypeLoca *)gmallocn(nGlyphs + 1, sizeof(TrueTypeLoca)); |
| 1242 | i = seekTable("loca"); |
| 1243 | pos = tables[i].offset; |
| 1244 | ok = gTrue; |
| 1245 | for (i = 0; i <= nGlyphs; ++i) { |
| 1246 | locaTable[i].idx = i; |
| 1247 | if (locaFmt) { |
| 1248 | locaTable[i].origOffset = (int)getU32BE(pos + i*4, &ok); |
| 1249 | } else { |
| 1250 | locaTable[i].origOffset = 2 * getU16BE(pos + i*2, &ok); |
| 1251 | } |
| 1252 | } |
| 1253 | qsort(locaTable, nGlyphs + 1, sizeof(TrueTypeLoca), |
| 1254 | &cmpTrueTypeLocaOffset); |
| 1255 | for (i = 0; i < nGlyphs; ++i) { |
| 1256 | locaTable[i].len = locaTable[i+1].origOffset - locaTable[i].origOffset; |
| 1257 | } |
| 1258 | locaTable[nGlyphs].len = 0; |
| 1259 | qsort(locaTable, nGlyphs + 1, sizeof(TrueTypeLoca), |
| 1260 | &cmpTrueTypeLocaIdx); |
| 1261 | pos = 0; |
| 1262 | for (i = 0; i <= nGlyphs; ++i) { |
| 1263 | locaTable[i].newOffset = pos; |
| 1264 | pos += locaTable[i].len; |
| 1265 | if (pos & 3) { |
| 1266 | pos += 4 - (pos & 3); |
| 1267 | } |
| 1268 | } |
| 1269 | |
| 1270 | // construct the new 'loca' table |
| 1271 | locaData = (Guchar *)gmallocn(nGlyphs + 1, (locaFmt ? 4 : 2)); |
| 1272 | for (i = 0; i <= nGlyphs; ++i) { |
| 1273 | pos = locaTable[i].newOffset; |
| 1274 | if (locaFmt) { |
| 1275 | locaData[4*i ] = (Guchar)(pos >> 24); |
| 1276 | locaData[4*i+1] = (Guchar)(pos >> 16); |
| 1277 | locaData[4*i+2] = (Guchar)(pos >> 8); |
| 1278 | locaData[4*i+3] = (Guchar) pos; |
| 1279 | } else { |
| 1280 | locaData[2*i ] = (Guchar)(pos >> 9); |
| 1281 | locaData[2*i+1] = (Guchar)(pos >> 1); |
| 1282 | } |
| 1283 | } |
| 1284 | |
| 1285 | // count the number of tables |
| 1286 | nNewTables = 0; |
| 1287 | for (i = 0; i < nT42Tables; ++i) { |
| 1288 | if (t42Tables[i].required || |
| 1289 | seekTable(t42Tables[i].tag) >= 0) { |
| 1290 | ++nNewTables; |
| 1291 | } |
| 1292 | } |
| 1293 | vmtxTab = NULL; // make gcc happy |
| 1294 | advance = 0; // make gcc happy |
| 1295 | if (needVerticalMetrics) { |
| 1296 | needVhea = seekTable("vhea") < 0; |
| 1297 | needVmtx = seekTable("vmtx") < 0; |
| 1298 | if (needVhea || needVmtx) { |
| 1299 | i = seekTable("head"); |
| 1300 | advance = getU16BE(tables[i].offset + 18, &ok); // units per em |
| 1301 | if (needVhea) { |
| 1302 | ++nNewTables; |
| 1303 | } |
| 1304 | if (needVmtx) { |
| 1305 | ++nNewTables; |
| 1306 | } |
| 1307 | } |
| 1308 | } |
| 1309 | |
| 1310 | // construct the new table headers, including table checksums |
| 1311 | // (pad each table out to a multiple of 4 bytes) |
| 1312 | pos = 12 + nNewTables*16; |
| 1313 | k = 0; |
| 1314 | for (i = 0; i < nT42Tables; ++i) { |
| 1315 | length = -1; |
| 1316 | checksum = 0; // make gcc happy |
| 1317 | if (i == t42HeadTable) { |
| 1318 | length = 54; |
| 1319 | checksum = computeTableChecksum(headData, 54); |
| 1320 | } else if (i == t42LocaTable) { |
| 1321 | length = (nGlyphs + 1) * (locaFmt ? 4 : 2); |
| 1322 | checksum = computeTableChecksum(locaData, length); |
| 1323 | } else if (i == t42GlyfTable) { |
| 1324 | length = 0; |
| 1325 | checksum = 0; |
| 1326 | glyfPos = tables[seekTable("glyf")].offset; |
| 1327 | for (j = 0; j < nGlyphs; ++j) { |
| 1328 | length += locaTable[j].len; |
| 1329 | if (length & 3) { |
| 1330 | length += 4 - (length & 3); |
| 1331 | } |
| 1332 | if (checkRegion(glyfPos + locaTable[j].origOffset, locaTable[j].len)) { |
| 1333 | checksum += |
| 1334 | computeTableChecksum(file + glyfPos + locaTable[j].origOffset, |
| 1335 | locaTable[j].len); |
| 1336 | } |
| 1337 | } |
| 1338 | } else { |
| 1339 | if ((j = seekTable(t42Tables[i].tag)) >= 0) { |
| 1340 | length = tables[j].len; |
| 1341 | if (checkRegion(tables[j].offset, length)) { |
| 1342 | checksum = computeTableChecksum(file + tables[j].offset, length); |
| 1343 | } |
| 1344 | } else if (needVerticalMetrics && i == t42VheaTable) { |
| 1345 | vheaTab[10] = advance / 256; // max advance height |
| 1346 | vheaTab[11] = advance % 256; |
| 1347 | length = sizeof(vheaTab); |
| 1348 | checksum = computeTableChecksum(vheaTab, length); |
| 1349 | } else if (needVerticalMetrics && i == t42VmtxTable) { |
| 1350 | length = 4 + (nGlyphs - 1) * 4; |
| 1351 | vmtxTab = (Guchar *)gmalloc(length); |
| 1352 | vmtxTab[0] = advance / 256; |
| 1353 | vmtxTab[1] = advance % 256; |
| 1354 | for (j = 2; j < length; j += 2) { |
| 1355 | vmtxTab[j] = 0; |
| 1356 | vmtxTab[j+1] = 0; |
| 1357 | } |
| 1358 | checksum = computeTableChecksum(vmtxTab, length); |
| 1359 | } else if (t42Tables[i].required) { |
| 1360 | //~ error(-1, "Embedded TrueType font is missing a required table ('%s')", |
| 1361 | //~ t42Tables[i].tag); |
| 1362 | length = 0; |
| 1363 | checksum = 0; |
| 1364 | } |
| 1365 | } |
| 1366 | if (length >= 0) { |
| 1367 | newTables[k].tag = ((t42Tables[i].tag[0] & 0xff) << 24) | |
| 1368 | ((t42Tables[i].tag[1] & 0xff) << 16) | |
| 1369 | ((t42Tables[i].tag[2] & 0xff) << 8) | |
| 1370 | (t42Tables[i].tag[3] & 0xff); |
| 1371 | newTables[k].checksum = checksum; |
| 1372 | newTables[k].offset = pos; |
| 1373 | newTables[k].len = length; |
| 1374 | pos += length; |
| 1375 | if (pos & 3) { |
| 1376 | pos += 4 - (length & 3); |
| 1377 | } |
| 1378 | ++k; |
| 1379 | } |
| 1380 | } |
| 1381 | |
| 1382 | // construct the table directory |
| 1383 | tableDir[0] = 0x00; // sfnt version |
| 1384 | tableDir[1] = 0x01; |
| 1385 | tableDir[2] = 0x00; |
| 1386 | tableDir[3] = 0x00; |
| 1387 | tableDir[4] = 0; // numTables |
| 1388 | tableDir[5] = nNewTables; |
| 1389 | tableDir[6] = 0; // searchRange |
| 1390 | tableDir[7] = (Guchar)128; |
| 1391 | tableDir[8] = 0; // entrySelector |
| 1392 | tableDir[9] = 3; |
| 1393 | tableDir[10] = 0; // rangeShift |
| 1394 | tableDir[11] = (Guchar)(16 * nNewTables - 128); |
| 1395 | pos = 12; |
| 1396 | for (i = 0; i < nNewTables; ++i) { |
| 1397 | tableDir[pos ] = (Guchar)(newTables[i].tag >> 24); |
| 1398 | tableDir[pos+ 1] = (Guchar)(newTables[i].tag >> 16); |
| 1399 | tableDir[pos+ 2] = (Guchar)(newTables[i].tag >> 8); |
| 1400 | tableDir[pos+ 3] = (Guchar) newTables[i].tag; |
| 1401 | tableDir[pos+ 4] = (Guchar)(newTables[i].checksum >> 24); |
| 1402 | tableDir[pos+ 5] = (Guchar)(newTables[i].checksum >> 16); |
| 1403 | tableDir[pos+ 6] = (Guchar)(newTables[i].checksum >> 8); |
| 1404 | tableDir[pos+ 7] = (Guchar) newTables[i].checksum; |
| 1405 | tableDir[pos+ 8] = (Guchar)(newTables[i].offset >> 24); |
| 1406 | tableDir[pos+ 9] = (Guchar)(newTables[i].offset >> 16); |
| 1407 | tableDir[pos+10] = (Guchar)(newTables[i].offset >> 8); |
| 1408 | tableDir[pos+11] = (Guchar) newTables[i].offset; |
| 1409 | tableDir[pos+12] = (Guchar)(newTables[i].len >> 24); |
| 1410 | tableDir[pos+13] = (Guchar)(newTables[i].len >> 16); |
| 1411 | tableDir[pos+14] = (Guchar)(newTables[i].len >> 8); |
| 1412 | tableDir[pos+15] = (Guchar) newTables[i].len; |
| 1413 | pos += 16; |
| 1414 | } |
| 1415 | |
| 1416 | // compute the font checksum and store it in the head table |
| 1417 | checksum = computeTableChecksum(tableDir, 12 + nNewTables*16); |
| 1418 | for (i = 0; i < nNewTables; ++i) { |
| 1419 | checksum += newTables[i].checksum; |
| 1420 | } |
| 1421 | checksum = 0xb1b0afba - checksum; // because the TrueType spec says so |
| 1422 | headData[ 8] = (Guchar)(checksum >> 24); |
| 1423 | headData[ 9] = (Guchar)(checksum >> 16); |
| 1424 | headData[10] = (Guchar)(checksum >> 8); |
| 1425 | headData[11] = (Guchar) checksum; |
| 1426 | |
| 1427 | // start the sfnts array |
| 1428 | if (name) { |
| 1429 | (*outputFunc)(outputStream, "/", 1); |
| 1430 | (*outputFunc)(outputStream, name->getCString(), name->getLength()); |
| 1431 | (*outputFunc)(outputStream, " [\n", 3); |
| 1432 | } else { |
| 1433 | (*outputFunc)(outputStream, "/sfnts [\n", 9); |
| 1434 | } |
| 1435 | |
| 1436 | // write the table directory |
| 1437 | dumpString(tableDir, 12 + nNewTables*16, outputFunc, outputStream); |
| 1438 | |
| 1439 | // write the tables |
| 1440 | for (i = 0; i < nNewTables; ++i) { |
| 1441 | if (i == t42HeadTable) { |
| 1442 | dumpString(headData, 54, outputFunc, outputStream); |
| 1443 | } else if (i == t42LocaTable) { |
| 1444 | length = (nGlyphs + 1) * (locaFmt ? 4 : 2); |
| 1445 | dumpString(locaData, length, outputFunc, outputStream); |
| 1446 | } else if (i == t42GlyfTable) { |
| 1447 | glyfPos = tables[seekTable("glyf")].offset; |
| 1448 | for (j = 0; j < nGlyphs; ++j) { |
| 1449 | if (locaTable[j].len > 0 && |
| 1450 | checkRegion(glyfPos + locaTable[j].origOffset, locaTable[j].len)) { |
| 1451 | dumpString(file + glyfPos + locaTable[j].origOffset, |
| 1452 | locaTable[j].len, outputFunc, outputStream); |
| 1453 | } |
| 1454 | } |
| 1455 | } else { |
| 1456 | // length == 0 means the table is missing and the error was |
| 1457 | // already reported during the construction of the table |
| 1458 | // headers |
| 1459 | if ((length = newTables[i].len) > 0) { |
| 1460 | if ((j = seekTable(t42Tables[i].tag)) >= 0 && |
| 1461 | checkRegion(tables[j].offset, tables[j].len)) { |
| 1462 | dumpString(file + tables[j].offset, tables[j].len, |
| 1463 | outputFunc, outputStream); |
| 1464 | } else if (needVerticalMetrics && i == t42VheaTable) { |
| 1465 | dumpString(vheaTab, length, outputFunc, outputStream); |
| 1466 | } else if (needVerticalMetrics && i == t42VmtxTable) { |
| 1467 | dumpString(vmtxTab, length, outputFunc, outputStream); |
| 1468 | gfree(vmtxTab); |
| 1469 | } |
| 1470 | } |
| 1471 | } |
| 1472 | } |
| 1473 | |
| 1474 | // end the sfnts array |
| 1475 | (*outputFunc)(outputStream, "] def\n", 6); |
| 1476 | |
| 1477 | gfree(locaData); |
| 1478 | gfree(locaTable); |
| 1479 | } |
| 1480 | |
| 1481 | void FoFiTrueType::dumpString(Guchar *s, int length, |
| 1482 | FoFiOutputFunc outputFunc, |
| 1483 | void *outputStream) { |
| 1484 | char buf[64]; |
| 1485 | int pad, i, j; |
| 1486 | |
| 1487 | (*outputFunc)(outputStream, "<", 1); |
| 1488 | for (i = 0; i < length; i += 32) { |
| 1489 | for (j = 0; j < 32 && i+j < length; ++j) { |
| 1490 | sprintf(buf, "%02X", s[i+j] & 0xff); |
| 1491 | (*outputFunc)(outputStream, buf, strlen(buf)); |
| 1492 | } |
| 1493 | if (i % (65536 - 32) == 65536 - 64) { |
| 1494 | (*outputFunc)(outputStream, ">\n<", 3); |
| 1495 | } else if (i+32 < length) { |
| 1496 | (*outputFunc)(outputStream, "\n", 1); |
| 1497 | } |
| 1498 | } |
| 1499 | if (length & 3) { |
| 1500 | pad = 4 - (length & 3); |
| 1501 | for (i = 0; i < pad; ++i) { |
| 1502 | (*outputFunc)(outputStream, "00", 2); |
| 1503 | } |
| 1504 | } |
| 1505 | // add an extra zero byte because the Adobe Type 42 spec says so |
| 1506 | (*outputFunc)(outputStream, "00>\n", 4); |
| 1507 | } |
| 1508 | |
| 1509 | Guint FoFiTrueType::computeTableChecksum(Guchar *data, int length) { |
| 1510 | Guint checksum, word; |
| 1511 | int i; |
| 1512 | |
| 1513 | checksum = 0; |
| 1514 | for (i = 0; i+3 < length; i += 4) { |
| 1515 | word = ((data[i ] & 0xff) << 24) + |
| 1516 | ((data[i+1] & 0xff) << 16) + |
| 1517 | ((data[i+2] & 0xff) << 8) + |
| 1518 | (data[i+3] & 0xff); |
| 1519 | checksum += word; |
| 1520 | } |
| 1521 | if (length & 3) { |
| 1522 | word = 0; |
| 1523 | i = length & ~3; |
| 1524 | switch (length & 3) { |
| 1525 | case 3: |
| 1526 | word |= (data[i+2] & 0xff) << 8; |
| 1527 | case 2: |
| 1528 | word |= (data[i+1] & 0xff) << 16; |
| 1529 | case 1: |
| 1530 | word |= (data[i ] & 0xff) << 24; |
| 1531 | break; |
| 1532 | } |
| 1533 | checksum += word; |
| 1534 | } |
| 1535 | return checksum; |
| 1536 | } |
| 1537 | |
| 1538 | void FoFiTrueType::parse() { |
| 1539 | Guint topTag; |
| 1540 | int pos, i, j; |
| 1541 | |
| 1542 | parsedOk = gTrue; |
| 1543 | |
| 1544 | // look for a collection (TTC) |
| 1545 | topTag = getU32BE(0, &parsedOk); |
| 1546 | if (!parsedOk) { |
| 1547 | return; |
| 1548 | } |
| 1549 | if (topTag == ttcfTag) { |
| 1550 | pos = getU32BE(12, &parsedOk); |
| 1551 | if (!parsedOk) { |
| 1552 | return; |
| 1553 | } |
| 1554 | } else { |
| 1555 | pos = 0; |
| 1556 | } |
| 1557 | |
| 1558 | // read the table directory |
| 1559 | nTables = getU16BE(pos + 4, &parsedOk); |
| 1560 | if (!parsedOk) { |
| 1561 | return; |
| 1562 | } |
| 1563 | tables = (TrueTypeTable *)gmallocn(nTables, sizeof(TrueTypeTable)); |
| 1564 | pos += 12; |
| 1565 | for (i = 0; i < nTables; ++i) { |
| 1566 | tables[i].tag = getU32BE(pos, &parsedOk); |
| 1567 | tables[i].checksum = getU32BE(pos + 4, &parsedOk); |
| 1568 | tables[i].offset = (int)getU32BE(pos + 8, &parsedOk); |
| 1569 | tables[i].len = (int)getU32BE(pos + 12, &parsedOk); |
| 1570 | if (tables[i].offset + tables[i].len < tables[i].offset || |
| 1571 | tables[i].offset + tables[i].len > len) { |
| 1572 | parsedOk = gFalse; |
| 1573 | } |
| 1574 | pos += 16; |
| 1575 | } |
| 1576 | if (!parsedOk) { |
| 1577 | return; |
| 1578 | } |
| 1579 | |
| 1580 | // check for tables that are required by both the TrueType spec and |
| 1581 | // the Type 42 spec |
| 1582 | if (seekTable("head") < 0 || |
| 1583 | seekTable("hhea") < 0 || |
| 1584 | seekTable("loca") < 0 || |
| 1585 | seekTable("maxp") < 0 || |
| 1586 | seekTable("glyf") < 0 || |
| 1587 | seekTable("hmtx") < 0) { |
| 1588 | parsedOk = gFalse; |
| 1589 | return; |
| 1590 | } |
| 1591 | |
| 1592 | // read the cmaps |
| 1593 | if ((i = seekTable("cmap")) >= 0) { |
| 1594 | pos = tables[i].offset + 2; |
| 1595 | nCmaps = getU16BE(pos, &parsedOk); |
| 1596 | pos += 2; |
| 1597 | if (!parsedOk) { |
| 1598 | return; |
| 1599 | } |
| 1600 | cmaps = (TrueTypeCmap *)gmallocn(nCmaps, sizeof(TrueTypeCmap)); |
| 1601 | for (j = 0; j < nCmaps; ++j) { |
| 1602 | cmaps[j].platform = getU16BE(pos, &parsedOk); |
| 1603 | cmaps[j].encoding = getU16BE(pos + 2, &parsedOk); |
| 1604 | cmaps[j].offset = tables[i].offset + getU32BE(pos + 4, &parsedOk); |
| 1605 | pos += 8; |
| 1606 | cmaps[j].fmt = getU16BE(cmaps[j].offset, &parsedOk); |
| 1607 | cmaps[j].len = getU16BE(cmaps[j].offset + 2, &parsedOk); |
| 1608 | } |
| 1609 | if (!parsedOk) { |
| 1610 | return; |
| 1611 | } |
| 1612 | } else { |
| 1613 | nCmaps = 0; |
| 1614 | } |
| 1615 | |
| 1616 | // get the number of glyphs from the maxp table |
| 1617 | i = seekTable("maxp"); |
| 1618 | nGlyphs = getU16BE(tables[i].offset + 4, &parsedOk); |
| 1619 | if (!parsedOk) { |
| 1620 | return; |
| 1621 | } |
| 1622 | |
| 1623 | // get the bbox and loca table format from the head table |
| 1624 | i = seekTable("head"); |
| 1625 | bbox[0] = getS16BE(tables[i].offset + 36, &parsedOk); |
| 1626 | bbox[1] = getS16BE(tables[i].offset + 38, &parsedOk); |
| 1627 | bbox[2] = getS16BE(tables[i].offset + 40, &parsedOk); |
| 1628 | bbox[3] = getS16BE(tables[i].offset + 42, &parsedOk); |
| 1629 | locaFmt = getS16BE(tables[i].offset + 50, &parsedOk); |
| 1630 | if (!parsedOk) { |
| 1631 | return; |
| 1632 | } |
| 1633 | |
| 1634 | // make sure the loca table is sane (correct length and entries are |
| 1635 | // in bounds) |
| 1636 | i = seekTable("loca"); |
| 1637 | if (tables[i].len < (nGlyphs + 1) * (locaFmt ? 4 : 2)) { |
| 1638 | parsedOk = gFalse; |
| 1639 | return; |
| 1640 | } |
| 1641 | for (j = 0; j <= nGlyphs; ++j) { |
| 1642 | if (locaFmt) { |
| 1643 | pos = (int)getU32BE(tables[i].offset + j*4, &parsedOk); |
| 1644 | } else { |
| 1645 | pos = getU16BE(tables[i].offset + j*2, &parsedOk); |
| 1646 | } |
| 1647 | if (pos < 0 || pos > len) { |
| 1648 | parsedOk = gFalse; |
| 1649 | } |
| 1650 | } |
| 1651 | if (!parsedOk) { |
| 1652 | return; |
| 1653 | } |
| 1654 | |
| 1655 | // read the post table |
| 1656 | readPostTable(); |
| 1657 | } |
| 1658 | |
| 1659 | void FoFiTrueType::readPostTable() { |
| 1660 | GString *name; |
| 1661 | int tablePos, postFmt, stringIdx, stringPos; |
| 1662 | GBool ok; |
| 1663 | int i, j, n, m; |
| 1664 | |
| 1665 | ok = gTrue; |
| 1666 | if ((i = seekTable("post")) < 0) { |
| 1667 | return; |
| 1668 | } |
| 1669 | tablePos = tables[i].offset; |
| 1670 | postFmt = getU32BE(tablePos, &ok); |
| 1671 | if (!ok) { |
| 1672 | goto err; |
| 1673 | } |
| 1674 | if (postFmt == 0x00010000) { |
| 1675 | nameToGID = new GHash(gTrue); |
| 1676 | for (i = 0; i < 258; ++i) { |
| 1677 | nameToGID->add(new GString(macGlyphNames[i]), i); |
| 1678 | } |
| 1679 | } else if (postFmt == 0x00020000) { |
| 1680 | nameToGID = new GHash(gTrue); |
| 1681 | n = getU16BE(tablePos + 32, &ok); |
| 1682 | if (!ok) { |
| 1683 | goto err; |
| 1684 | } |
| 1685 | if (n > nGlyphs) { |
| 1686 | n = nGlyphs; |
| 1687 | } |
| 1688 | stringIdx = 0; |
| 1689 | stringPos = tablePos + 34 + 2*n; |
| 1690 | for (i = 0; i < n; ++i) { |
| 1691 | j = getU16BE(tablePos + 34 + 2*i, &ok); |
| 1692 | if (j < 258) { |
| 1693 | nameToGID->removeInt(macGlyphNames[j]); |
| 1694 | nameToGID->add(new GString(macGlyphNames[j]), i); |
| 1695 | } else { |
| 1696 | j -= 258; |
| 1697 | if (j != stringIdx) { |
| 1698 | for (stringIdx = 0, stringPos = tablePos + 34 + 2*n; |
| 1699 | stringIdx < j; |
| 1700 | ++stringIdx, stringPos += 1 + getU8(stringPos, &ok)) ; |
| 1701 | if (!ok) { |
| 1702 | goto err; |
| 1703 | } |
| 1704 | } |
| 1705 | m = getU8(stringPos, &ok); |
| 1706 | if (!ok || !checkRegion(stringPos + 1, m)) { |
| 1707 | goto err; |
| 1708 | } |
| 1709 | name = new GString((char *)&file[stringPos + 1], m); |
| 1710 | nameToGID->removeInt(name); |
| 1711 | nameToGID->add(name, i); |
| 1712 | ++stringIdx; |
| 1713 | stringPos += 1 + m; |
| 1714 | } |
| 1715 | } |
| 1716 | } else if (postFmt == 0x00028000) { |
| 1717 | nameToGID = new GHash(gTrue); |
| 1718 | for (i = 0; i < nGlyphs; ++i) { |
| 1719 | j = getU8(tablePos + 32 + i, &ok); |
| 1720 | if (!ok) { |
| 1721 | goto err; |
| 1722 | } |
| 1723 | if (j < 258) { |
| 1724 | nameToGID->removeInt(macGlyphNames[j]); |
| 1725 | nameToGID->add(new GString(macGlyphNames[j]), i); |
| 1726 | } |
| 1727 | } |
| 1728 | } |
| 1729 | |
| 1730 | return; |
| 1731 | |
| 1732 | err: |
| 1733 | if (nameToGID) { |
| 1734 | delete nameToGID; |
| 1735 | nameToGID = NULL; |
| 1736 | } |
| 1737 | } |
| 1738 | |
| 1739 | int FoFiTrueType::seekTable(char *tag) { |
| 1740 | Guint tagI; |
| 1741 | int i; |
| 1742 | |
| 1743 | tagI = ((tag[0] & 0xff) << 24) | |
| 1744 | ((tag[1] & 0xff) << 16) | |
| 1745 | ((tag[2] & 0xff) << 8) | |
| 1746 | (tag[3] & 0xff); |
| 1747 | for (i = 0; i < nTables; ++i) { |
| 1748 | if (tables[i].tag == tagI) { |
| 1749 | return i; |
| 1750 | } |
| 1751 | } |
| 1752 | return -1; |
| 1753 | } |
projects / thirdparty / cups.git / blame