1 /***************************************************************************/ 2 /* */ 3 /* ttpost.c */ 4 /* */ 5 /* Postcript name table processing for TrueType and OpenType fonts */ 6 /* (body). */ 7 /* */ 8 /* Copyright 1996-2001, 2002, 2003, 2006, 2007, 2008 by */ 9 /* David Turner, Robert Wilhelm, and Werner Lemberg. */ 10 /* */ 11 /* This file is part of the FreeType project, and may only be used, */ 12 /* modified, and distributed under the terms of the FreeType project */ 13 /* license, LICENSE.TXT. By continuing to use, modify, or distribute */ 14 /* this file you indicate that you have read the license and */ 15 /* understand and accept it fully. */ 16 /* */ 17 /***************************************************************************/ 18 19 /*************************************************************************/ 20 /* */ 21 /* The post table is not completely loaded by the core engine. This */ 22 /* file loads the missing PS glyph names and implements an API to access */ 23 /* them. */ 24 /* */ 25 /*************************************************************************/ 26 27 28 #include <ft2build.h> 29 #include FT_INTERNAL_STREAM_H 30 #include FT_TRUETYPE_TAGS_H 31 #include "ttpost.h" 32 #include "ttload.h" 33 34 #include "sferrors.h" 35 36 37 /*************************************************************************/ 38 /* */ 39 /* The macro FT_COMPONENT is used in trace mode. It is an implicit */ 40 /* parameter of the FT_TRACE() and FT_ERROR() macros, used to print/log */ 41 /* messages during execution. */ 42 /* */ 43 #undef FT_COMPONENT 44 #define FT_COMPONENT trace_ttpost 45 46 47 /* If this configuration macro is defined, we rely on the `PSNames' */ 48 /* module to grab the glyph names. */ 49 50 #ifdef FT_CONFIG_OPTION_POSTSCRIPT_NAMES 51 52 53 #include FT_SERVICE_POSTSCRIPT_CMAPS_H 54 55 #define MAC_NAME( x ) ( (FT_String*)psnames->macintosh_name( x ) ) 56 57 58 #else /* FT_CONFIG_OPTION_POSTSCRIPT_NAMES */ 59 60 61 /* Otherwise, we ignore the `PSNames' module, and provide our own */ 62 /* table of Mac names. Thus, it is possible to build a version of */ 63 /* FreeType without the Type 1 driver & PSNames module. */ 64 65 #define MAC_NAME( x ) ( (FT_String*)tt_post_default_names[x] ) 66 67 /* the 258 default Mac PS glyph names */ 68 69 static const FT_String* const tt_post_default_names[258] = 70 { 71 /* 0 */ 72 ".notdef", ".null", "CR", "space", "exclam", 73 "quotedbl", "numbersign", "dollar", "percent", "ampersand", 74 /* 10 */ 75 "quotesingle", "parenleft", "parenright", "asterisk", "plus", 76 "comma", "hyphen", "period", "slash", "zero", 77 /* 20 */ 78 "one", "two", "three", "four", "five", 79 "six", "seven", "eight", "nine", "colon", 80 /* 30 */ 81 "semicolon", "less", "equal", "greater", "question", 82 "at", "A", "B", "C", "D", 83 /* 40 */ 84 "E", "F", "G", "H", "I", 85 "J", "K", "L", "M", "N", 86 /* 50 */ 87 "O", "P", "Q", "R", "S", 88 "T", "U", "V", "W", "X", 89 /* 60 */ 90 "Y", "Z", "bracketleft", "backslash", "bracketright", 91 "asciicircum", "underscore", "grave", "a", "b", 92 /* 70 */ 93 "c", "d", "e", "f", "g", 94 "h", "i", "j", "k", "l", 95 /* 80 */ 96 "m", "n", "o", "p", "q", 97 "r", "s", "t", "u", "v", 98 /* 90 */ 99 "w", "x", "y", "z", "braceleft", 100 "bar", "braceright", "asciitilde", "Adieresis", "Aring", 101 /* 100 */ 102 "Ccedilla", "Eacute", "Ntilde", "Odieresis", "Udieresis", 103 "aacute", "agrave", "acircumflex", "adieresis", "atilde", 104 /* 110 */ 105 "aring", "ccedilla", "eacute", "egrave", "ecircumflex", 106 "edieresis", "iacute", "igrave", "icircumflex", "idieresis", 107 /* 120 */ 108 "ntilde", "oacute", "ograve", "ocircumflex", "odieresis", 109 "otilde", "uacute", "ugrave", "ucircumflex", "udieresis", 110 /* 130 */ 111 "dagger", "degree", "cent", "sterling", "section", 112 "bullet", "paragraph", "germandbls", "registered", "copyright", 113 /* 140 */ 114 "trademark", "acute", "dieresis", "notequal", "AE", 115 "Oslash", "infinity", "plusminus", "lessequal", "greaterequal", 116 /* 150 */ 117 "yen", "mu", "partialdiff", "summation", "product", 118 "pi", "integral", "ordfeminine", "ordmasculine", "Omega", 119 /* 160 */ 120 "ae", "oslash", "questiondown", "exclamdown", "logicalnot", 121 "radical", "florin", "approxequal", "Delta", "guillemotleft", 122 /* 170 */ 123 "guillemotright", "ellipsis", "nbspace", "Agrave", "Atilde", 124 "Otilde", "OE", "oe", "endash", "emdash", 125 /* 180 */ 126 "quotedblleft", "quotedblright", "quoteleft", "quoteright", "divide", 127 "lozenge", "ydieresis", "Ydieresis", "fraction", "currency", 128 /* 190 */ 129 "guilsinglleft", "guilsinglright", "fi", "fl", "daggerdbl", 130 "periodcentered", "quotesinglbase", "quotedblbase", "perthousand", "Acircumflex", 131 /* 200 */ 132 "Ecircumflex", "Aacute", "Edieresis", "Egrave", "Iacute", 133 "Icircumflex", "Idieresis", "Igrave", "Oacute", "Ocircumflex", 134 /* 210 */ 135 "apple", "Ograve", "Uacute", "Ucircumflex", "Ugrave", 136 "dotlessi", "circumflex", "tilde", "macron", "breve", 137 /* 220 */ 138 "dotaccent", "ring", "cedilla", "hungarumlaut", "ogonek", 139 "caron", "Lslash", "lslash", "Scaron", "scaron", 140 /* 230 */ 141 "Zcaron", "zcaron", "brokenbar", "Eth", "eth", 142 "Yacute", "yacute", "Thorn", "thorn", "minus", 143 /* 240 */ 144 "multiply", "onesuperior", "twosuperior", "threesuperior", "onehalf", 145 "onequarter", "threequarters", "franc", "Gbreve", "gbreve", 146 /* 250 */ 147 "Idot", "Scedilla", "scedilla", "Cacute", "cacute", 148 "Ccaron", "ccaron", "dmacron", 149 }; 150 151 152 #endif /* FT_CONFIG_OPTION_POSTSCRIPT_NAMES */ 153 154 155 static FT_Error load_format_20(TT_Face face,FT_Stream stream)156 load_format_20( TT_Face face, 157 FT_Stream stream ) 158 { 159 FT_Memory memory = stream->memory; 160 FT_Error error; 161 162 FT_Int num_glyphs; 163 FT_UShort num_names; 164 165 FT_UShort* glyph_indices = 0; 166 FT_Char** name_strings = 0; 167 168 169 if ( FT_READ_USHORT( num_glyphs ) ) 170 goto Exit; 171 172 /* UNDOCUMENTED! The number of glyphs in this table can be smaller */ 173 /* than the value in the maxp table (cf. cyberbit.ttf). */ 174 175 /* There already exist fonts which have more than 32768 glyph names */ 176 /* in this table, so the test for this threshold has been dropped. */ 177 178 if ( num_glyphs > face->max_profile.numGlyphs ) 179 { 180 error = SFNT_Err_Invalid_File_Format; 181 goto Exit; 182 } 183 184 /* load the indices */ 185 { 186 FT_Int n; 187 188 189 if ( FT_NEW_ARRAY ( glyph_indices, num_glyphs ) || 190 FT_FRAME_ENTER( num_glyphs * 2L ) ) 191 goto Fail; 192 193 for ( n = 0; n < num_glyphs; n++ ) 194 glyph_indices[n] = FT_GET_USHORT(); 195 196 FT_FRAME_EXIT(); 197 } 198 199 /* compute number of names stored in table */ 200 { 201 FT_Int n; 202 203 204 num_names = 0; 205 206 for ( n = 0; n < num_glyphs; n++ ) 207 { 208 FT_Int idx; 209 210 211 idx = glyph_indices[n]; 212 if ( idx >= 258 ) 213 { 214 idx -= 257; 215 if ( idx > num_names ) 216 num_names = (FT_UShort)idx; 217 } 218 } 219 } 220 221 /* now load the name strings */ 222 { 223 FT_UShort n; 224 225 226 if ( FT_NEW_ARRAY( name_strings, num_names ) ) 227 goto Fail; 228 229 for ( n = 0; n < num_names; n++ ) 230 { 231 FT_UInt len; 232 233 234 if ( FT_READ_BYTE ( len ) || 235 FT_NEW_ARRAY( name_strings[n], len + 1 ) || 236 FT_STREAM_READ ( name_strings[n], len ) ) 237 goto Fail1; 238 239 name_strings[n][len] = '\0'; 240 } 241 } 242 243 /* all right, set table fields and exit successfully */ 244 { 245 TT_Post_20 table = &face->postscript_names.names.format_20; 246 247 248 table->num_glyphs = (FT_UShort)num_glyphs; 249 table->num_names = (FT_UShort)num_names; 250 table->glyph_indices = glyph_indices; 251 table->glyph_names = name_strings; 252 } 253 return SFNT_Err_Ok; 254 255 Fail1: 256 { 257 FT_UShort n; 258 259 260 for ( n = 0; n < num_names; n++ ) 261 FT_FREE( name_strings[n] ); 262 } 263 264 Fail: 265 FT_FREE( name_strings ); 266 FT_FREE( glyph_indices ); 267 268 Exit: 269 return error; 270 } 271 272 273 static FT_Error load_format_25(TT_Face face,FT_Stream stream)274 load_format_25( TT_Face face, 275 FT_Stream stream ) 276 { 277 FT_Memory memory = stream->memory; 278 FT_Error error; 279 280 FT_Int num_glyphs; 281 FT_Char* offset_table = 0; 282 283 284 /* UNDOCUMENTED! This value appears only in the Apple TT specs. */ 285 if ( FT_READ_USHORT( num_glyphs ) ) 286 goto Exit; 287 288 /* check the number of glyphs */ 289 if ( num_glyphs > face->max_profile.numGlyphs || num_glyphs > 258 ) 290 { 291 error = SFNT_Err_Invalid_File_Format; 292 goto Exit; 293 } 294 295 if ( FT_NEW_ARRAY( offset_table, num_glyphs ) || 296 FT_STREAM_READ( offset_table, num_glyphs ) ) 297 goto Fail; 298 299 /* now check the offset table */ 300 { 301 FT_Int n; 302 303 304 for ( n = 0; n < num_glyphs; n++ ) 305 { 306 FT_Long idx = (FT_Long)n + offset_table[n]; 307 308 309 if ( idx < 0 || idx > num_glyphs ) 310 { 311 error = SFNT_Err_Invalid_File_Format; 312 goto Fail; 313 } 314 } 315 } 316 317 /* OK, set table fields and exit successfully */ 318 { 319 TT_Post_25 table = &face->postscript_names.names.format_25; 320 321 322 table->num_glyphs = (FT_UShort)num_glyphs; 323 table->offsets = offset_table; 324 } 325 326 return SFNT_Err_Ok; 327 328 Fail: 329 FT_FREE( offset_table ); 330 331 Exit: 332 return error; 333 } 334 335 336 static FT_Error load_post_names(TT_Face face)337 load_post_names( TT_Face face ) 338 { 339 FT_Stream stream; 340 FT_Error error; 341 FT_Fixed format; 342 343 344 /* get a stream for the face's resource */ 345 stream = face->root.stream; 346 347 /* seek to the beginning of the PS names table */ 348 error = face->goto_table( face, TTAG_post, stream, 0 ); 349 if ( error ) 350 goto Exit; 351 352 format = face->postscript.FormatType; 353 354 /* go to beginning of subtable */ 355 if ( FT_STREAM_SKIP( 32 ) ) 356 goto Exit; 357 358 /* now read postscript table */ 359 if ( format == 0x00020000L ) 360 error = load_format_20( face, stream ); 361 else if ( format == 0x00028000L ) 362 error = load_format_25( face, stream ); 363 else 364 error = SFNT_Err_Invalid_File_Format; 365 366 face->postscript_names.loaded = 1; 367 368 Exit: 369 return error; 370 } 371 372 373 FT_LOCAL_DEF( void ) tt_face_free_ps_names(TT_Face face)374 tt_face_free_ps_names( TT_Face face ) 375 { 376 FT_Memory memory = face->root.memory; 377 TT_Post_Names names = &face->postscript_names; 378 FT_Fixed format; 379 380 381 if ( names->loaded ) 382 { 383 format = face->postscript.FormatType; 384 385 if ( format == 0x00020000L ) 386 { 387 TT_Post_20 table = &names->names.format_20; 388 FT_UShort n; 389 390 391 FT_FREE( table->glyph_indices ); 392 table->num_glyphs = 0; 393 394 for ( n = 0; n < table->num_names; n++ ) 395 FT_FREE( table->glyph_names[n] ); 396 397 FT_FREE( table->glyph_names ); 398 table->num_names = 0; 399 } 400 else if ( format == 0x00028000L ) 401 { 402 TT_Post_25 table = &names->names.format_25; 403 404 405 FT_FREE( table->offsets ); 406 table->num_glyphs = 0; 407 } 408 } 409 names->loaded = 0; 410 } 411 412 413 /*************************************************************************/ 414 /* */ 415 /* <Function> */ 416 /* tt_face_get_ps_name */ 417 /* */ 418 /* <Description> */ 419 /* Get the PostScript glyph name of a glyph. */ 420 /* */ 421 /* <Input> */ 422 /* face :: A handle to the parent face. */ 423 /* */ 424 /* idx :: The glyph index. */ 425 /* */ 426 /* <InOut> */ 427 /* PSname :: The address of a string pointer. Will be NULL in case */ 428 /* of error, otherwise it is a pointer to the glyph name. */ 429 /* */ 430 /* You must not modify the returned string! */ 431 /* */ 432 /* <Output> */ 433 /* FreeType error code. 0 means success. */ 434 /* */ 435 FT_LOCAL_DEF( FT_Error ) tt_face_get_ps_name(TT_Face face,FT_UInt idx,FT_String ** PSname)436 tt_face_get_ps_name( TT_Face face, 437 FT_UInt idx, 438 FT_String** PSname ) 439 { 440 FT_Error error; 441 TT_Post_Names names; 442 FT_Fixed format; 443 444 #ifdef FT_CONFIG_OPTION_POSTSCRIPT_NAMES 445 FT_Service_PsCMaps psnames; 446 #endif 447 448 449 if ( !face ) 450 return SFNT_Err_Invalid_Face_Handle; 451 452 if ( idx >= (FT_UInt)face->max_profile.numGlyphs ) 453 return SFNT_Err_Invalid_Glyph_Index; 454 455 #ifdef FT_CONFIG_OPTION_POSTSCRIPT_NAMES 456 psnames = (FT_Service_PsCMaps)face->psnames; 457 if ( !psnames ) 458 return SFNT_Err_Unimplemented_Feature; 459 #endif 460 461 names = &face->postscript_names; 462 463 /* `.notdef' by default */ 464 *PSname = MAC_NAME( 0 ); 465 466 format = face->postscript.FormatType; 467 468 if ( format == 0x00010000L ) 469 { 470 if ( idx < 258 ) /* paranoid checking */ 471 *PSname = MAC_NAME( idx ); 472 } 473 else if ( format == 0x00020000L ) 474 { 475 TT_Post_20 table = &names->names.format_20; 476 477 478 if ( !names->loaded ) 479 { 480 error = load_post_names( face ); 481 if ( error ) 482 goto End; 483 } 484 485 if ( idx < (FT_UInt)table->num_glyphs ) 486 { 487 FT_UShort name_index = table->glyph_indices[idx]; 488 489 490 if ( name_index < 258 ) 491 *PSname = MAC_NAME( name_index ); 492 else 493 *PSname = (FT_String*)table->glyph_names[name_index - 258]; 494 } 495 } 496 else if ( format == 0x00028000L ) 497 { 498 TT_Post_25 table = &names->names.format_25; 499 500 501 if ( !names->loaded ) 502 { 503 error = load_post_names( face ); 504 if ( error ) 505 goto End; 506 } 507 508 if ( idx < (FT_UInt)table->num_glyphs ) /* paranoid checking */ 509 { 510 idx += table->offsets[idx]; 511 *PSname = MAC_NAME( idx ); 512 } 513 } 514 515 /* nothing to do for format == 0x00030000L */ 516 517 End: 518 return SFNT_Err_Ok; 519 } 520 521 522 /* END */ 523