t42objs.c (19239B)
1 /**************************************************************************** 2 * 3 * t42objs.c 4 * 5 * Type 42 objects manager (body). 6 * 7 * Copyright (C) 2002-2025 by 8 * Roberto Alameda. 9 * 10 * This file is part of the FreeType project, and may only be used, 11 * modified, and distributed under the terms of the FreeType project 12 * license, LICENSE.TXT. By continuing to use, modify, or distribute 13 * this file you indicate that you have read the license and 14 * understand and accept it fully. 15 * 16 */ 17 18 19 #include "t42objs.h" 20 #include "t42parse.h" 21 #include "t42error.h" 22 #include <freetype/internal/ftdebug.h> 23 #include <freetype/ftlist.h> 24 #include <freetype/ttnameid.h> 25 26 27 #undef FT_COMPONENT 28 #define FT_COMPONENT t42 29 30 31 static FT_Error 32 T42_Open_Face( T42_Face face ) 33 { 34 T42_LoaderRec loader; 35 T42_Parser parser; 36 T1_Font type1 = &face->type1; 37 FT_Memory memory = face->root.memory; 38 FT_Error error; 39 40 PSAux_Service psaux = (PSAux_Service)face->psaux; 41 42 43 t42_loader_init( &loader, face ); 44 45 parser = &loader.parser; 46 47 face->ttf_data = NULL; 48 face->ttf_size = 0; 49 50 error = t42_parser_init( parser, 51 face->root.stream, 52 memory, 53 psaux); 54 if ( error ) 55 goto Exit; 56 57 error = t42_parse_dict( face, &loader, 58 parser->base_dict, parser->base_len ); 59 if ( error ) 60 goto Exit; 61 62 if ( type1->font_type != 42 ) 63 { 64 FT_ERROR(( "T42_Open_Face: cannot handle FontType %d\n", 65 type1->font_type )); 66 error = FT_THROW( Unknown_File_Format ); 67 goto Exit; 68 } 69 70 /* now, propagate the charstrings and glyphnames tables */ 71 /* to the Type1 data */ 72 type1->num_glyphs = loader.num_glyphs; 73 74 if ( !loader.charstrings.init ) 75 { 76 FT_ERROR(( "T42_Open_Face: no charstrings array in face\n" )); 77 error = FT_THROW( Invalid_File_Format ); 78 } 79 80 loader.charstrings.init = 0; 81 type1->charstrings_block = loader.charstrings.block; 82 type1->charstrings = loader.charstrings.elements; 83 type1->charstrings_len = loader.charstrings.lengths; 84 85 /* we copy the glyph names `block' and `elements' fields; */ 86 /* the `lengths' field must be released later */ 87 type1->glyph_names_block = loader.glyph_names.block; 88 type1->glyph_names = (FT_String**)loader.glyph_names.elements; 89 loader.glyph_names.block = NULL; 90 loader.glyph_names.elements = NULL; 91 92 /* we must now build type1.encoding when we have a custom array */ 93 if ( type1->encoding_type == T1_ENCODING_TYPE_ARRAY ) 94 { 95 FT_Int charcode, idx, min_char, max_char; 96 97 98 /* OK, we do the following: for each element in the encoding */ 99 /* table, look up the index of the glyph having the same name */ 100 /* as defined in the CharStrings array. */ 101 /* The index is then stored in type1.encoding.char_index, and */ 102 /* the name in type1.encoding.char_name */ 103 104 min_char = 0; 105 max_char = 0; 106 107 charcode = 0; 108 for ( ; charcode < loader.encoding_table.max_elems; charcode++ ) 109 { 110 const FT_String* char_name = 111 (const FT_String*)loader.encoding_table.elements[charcode]; 112 113 114 type1->encoding.char_index[charcode] = 0; 115 type1->encoding.char_name [charcode] = ".notdef"; 116 117 if ( char_name ) 118 for ( idx = 0; idx < type1->num_glyphs; idx++ ) 119 { 120 const FT_String* glyph_name = type1->glyph_names[idx]; 121 122 123 if ( ft_strcmp( char_name, glyph_name ) == 0 ) 124 { 125 type1->encoding.char_index[charcode] = (FT_UShort)idx; 126 type1->encoding.char_name [charcode] = glyph_name; 127 128 /* Change min/max encoded char only if glyph name is */ 129 /* not /.notdef */ 130 if ( ft_strcmp( ".notdef", glyph_name ) != 0 ) 131 { 132 if ( charcode < min_char ) 133 min_char = charcode; 134 if ( charcode >= max_char ) 135 max_char = charcode + 1; 136 } 137 break; 138 } 139 } 140 } 141 142 type1->encoding.code_first = min_char; 143 type1->encoding.code_last = max_char; 144 type1->encoding.num_chars = loader.num_chars; 145 } 146 147 Exit: 148 t42_loader_done( &loader ); 149 if ( error ) 150 { 151 FT_FREE( face->ttf_data ); 152 face->ttf_size = 0; 153 } 154 return error; 155 } 156 157 158 /***************** Driver Functions *************/ 159 160 161 FT_LOCAL_DEF( FT_Error ) 162 T42_Face_Init( FT_Stream stream, 163 FT_Face t42face, /* T42_Face */ 164 FT_Int face_index, 165 FT_Int num_params, 166 FT_Parameter* params ) 167 { 168 T42_Face face = (T42_Face)t42face; 169 FT_Error error; 170 FT_Service_PsCMaps psnames; 171 PSAux_Service psaux; 172 FT_Face root = (FT_Face)&face->root; 173 T1_Font type1 = &face->type1; 174 PS_FontInfo info = &type1->font_info; 175 176 FT_UNUSED( num_params ); 177 FT_UNUSED( params ); 178 FT_UNUSED( stream ); 179 180 181 face->ttf_face = NULL; 182 face->root.num_faces = 1; 183 184 FT_FACE_FIND_GLOBAL_SERVICE( face, psnames, POSTSCRIPT_CMAPS ); 185 face->psnames = psnames; 186 187 face->psaux = FT_Get_Module_Interface( FT_FACE_LIBRARY( face ), 188 "psaux" ); 189 psaux = (PSAux_Service)face->psaux; 190 if ( !psaux ) 191 { 192 FT_ERROR(( "T42_Face_Init: cannot access `psaux' module\n" )); 193 error = FT_THROW( Missing_Module ); 194 goto Exit; 195 } 196 197 FT_TRACE2(( "Type 42 driver\n" )); 198 199 /* open the tokenizer, this will also check the font format */ 200 error = T42_Open_Face( face ); 201 if ( error ) 202 goto Exit; 203 204 /* if we just wanted to check the format, leave successfully now */ 205 if ( face_index < 0 ) 206 goto Exit; 207 208 /* check the face index */ 209 if ( ( face_index & 0xFFFF ) > 0 ) 210 { 211 FT_ERROR(( "T42_Face_Init: invalid face index\n" )); 212 error = FT_THROW( Invalid_Argument ); 213 goto Exit; 214 } 215 216 /* Now load the font program into the face object */ 217 218 /* Init the face object fields */ 219 /* Now set up root face fields */ 220 221 root->num_glyphs = type1->num_glyphs; 222 root->num_charmaps = 0; 223 root->face_index = 0; 224 225 root->face_flags |= FT_FACE_FLAG_SCALABLE | 226 FT_FACE_FLAG_HORIZONTAL | 227 FT_FACE_FLAG_GLYPH_NAMES; 228 229 if ( info->is_fixed_pitch ) 230 root->face_flags |= FT_FACE_FLAG_FIXED_WIDTH; 231 232 #ifdef TT_CONFIG_OPTION_BYTECODE_INTERPRETER 233 root->face_flags |= FT_FACE_FLAG_HINTER; 234 #endif 235 236 /* XXX: TODO -- add kerning with .afm support */ 237 238 /* get style name -- be careful, some broken fonts only */ 239 /* have a `/FontName' dictionary entry! */ 240 root->family_name = info->family_name; 241 /* assume "Regular" style if we don't know better */ 242 root->style_name = (char *)"Regular"; 243 if ( root->family_name ) 244 { 245 char* full = info->full_name; 246 char* family = root->family_name; 247 248 249 if ( full ) 250 { 251 while ( *full ) 252 { 253 if ( *full == *family ) 254 { 255 family++; 256 full++; 257 } 258 else 259 { 260 if ( *full == ' ' || *full == '-' ) 261 full++; 262 else if ( *family == ' ' || *family == '-' ) 263 family++; 264 else 265 { 266 if ( !*family ) 267 root->style_name = full; 268 break; 269 } 270 } 271 } 272 } 273 } 274 else 275 { 276 /* do we have a `/FontName'? */ 277 if ( type1->font_name ) 278 root->family_name = type1->font_name; 279 } 280 281 /* no embedded bitmap support */ 282 root->num_fixed_sizes = 0; 283 root->available_sizes = NULL; 284 285 /* Load the TTF font embedded in the T42 font */ 286 { 287 FT_Open_Args args; 288 289 290 args.flags = FT_OPEN_MEMORY | FT_OPEN_DRIVER; 291 args.driver = FT_Get_Module( FT_FACE_LIBRARY( face ), 292 "truetype" ); 293 args.memory_base = face->ttf_data; 294 args.memory_size = face->ttf_size; 295 296 if ( num_params ) 297 { 298 args.flags |= FT_OPEN_PARAMS; 299 args.num_params = num_params; 300 args.params = params; 301 } 302 303 error = FT_Open_Face( FT_FACE_LIBRARY( face ), 304 &args, 0, &face->ttf_face ); 305 } 306 307 if ( error ) 308 goto Exit; 309 310 FT_Done_Size( face->ttf_face->size ); 311 312 /* Ignore info in FontInfo dictionary and use the info from the */ 313 /* loaded TTF font. The PostScript interpreter also ignores it. */ 314 root->bbox = face->ttf_face->bbox; 315 root->units_per_EM = face->ttf_face->units_per_EM; 316 317 root->ascender = face->ttf_face->ascender; 318 root->descender = face->ttf_face->descender; 319 root->height = face->ttf_face->height; 320 321 root->max_advance_width = face->ttf_face->max_advance_width; 322 root->max_advance_height = face->ttf_face->max_advance_height; 323 324 root->underline_position = (FT_Short)info->underline_position; 325 root->underline_thickness = (FT_Short)info->underline_thickness; 326 327 /* compute style flags */ 328 root->style_flags = 0; 329 if ( info->italic_angle ) 330 root->style_flags |= FT_STYLE_FLAG_ITALIC; 331 332 if ( face->ttf_face->style_flags & FT_STYLE_FLAG_BOLD ) 333 root->style_flags |= FT_STYLE_FLAG_BOLD; 334 335 if ( face->ttf_face->face_flags & FT_FACE_FLAG_VERTICAL ) 336 root->face_flags |= FT_FACE_FLAG_VERTICAL; 337 338 { 339 if ( psnames ) 340 { 341 FT_CharMapRec charmap; 342 T1_CMap_Classes cmap_classes = psaux->t1_cmap_classes; 343 FT_CMap_Class clazz; 344 345 346 charmap.face = root; 347 348 /* first of all, try to synthesize a Unicode charmap */ 349 charmap.platform_id = TT_PLATFORM_MICROSOFT; 350 charmap.encoding_id = TT_MS_ID_UNICODE_CS; 351 charmap.encoding = FT_ENCODING_UNICODE; 352 353 error = FT_CMap_New( cmap_classes->unicode, NULL, &charmap, NULL ); 354 if ( error && 355 FT_ERR_NEQ( error, No_Unicode_Glyph_Name ) && 356 FT_ERR_NEQ( error, Unimplemented_Feature ) ) 357 goto Exit; 358 error = FT_Err_Ok; 359 360 /* now, generate an Adobe Standard encoding when appropriate */ 361 charmap.platform_id = TT_PLATFORM_ADOBE; 362 clazz = NULL; 363 364 switch ( type1->encoding_type ) 365 { 366 case T1_ENCODING_TYPE_STANDARD: 367 charmap.encoding = FT_ENCODING_ADOBE_STANDARD; 368 charmap.encoding_id = TT_ADOBE_ID_STANDARD; 369 clazz = cmap_classes->standard; 370 break; 371 372 case T1_ENCODING_TYPE_EXPERT: 373 charmap.encoding = FT_ENCODING_ADOBE_EXPERT; 374 charmap.encoding_id = TT_ADOBE_ID_EXPERT; 375 clazz = cmap_classes->expert; 376 break; 377 378 case T1_ENCODING_TYPE_ARRAY: 379 charmap.encoding = FT_ENCODING_ADOBE_CUSTOM; 380 charmap.encoding_id = TT_ADOBE_ID_CUSTOM; 381 clazz = cmap_classes->custom; 382 break; 383 384 case T1_ENCODING_TYPE_ISOLATIN1: 385 charmap.encoding = FT_ENCODING_ADOBE_LATIN_1; 386 charmap.encoding_id = TT_ADOBE_ID_LATIN_1; 387 clazz = cmap_classes->unicode; 388 break; 389 390 default: 391 ; 392 } 393 394 if ( clazz ) 395 error = FT_CMap_New( clazz, NULL, &charmap, NULL ); 396 } 397 } 398 Exit: 399 return error; 400 } 401 402 403 FT_LOCAL_DEF( void ) 404 T42_Face_Done( FT_Face t42face ) 405 { 406 T42_Face face = (T42_Face)t42face; 407 T1_Font type1; 408 PS_FontInfo info; 409 FT_Memory memory; 410 411 412 if ( !face ) 413 return; 414 415 type1 = &face->type1; 416 info = &type1->font_info; 417 memory = face->root.memory; 418 419 /* delete internal ttf face prior to freeing face->ttf_data */ 420 if ( face->ttf_face ) 421 FT_Done_Face( face->ttf_face ); 422 423 /* release font info strings */ 424 FT_FREE( info->version ); 425 FT_FREE( info->notice ); 426 FT_FREE( info->full_name ); 427 FT_FREE( info->family_name ); 428 FT_FREE( info->weight ); 429 430 /* release top dictionary */ 431 FT_FREE( type1->charstrings_len ); 432 FT_FREE( type1->charstrings ); 433 FT_FREE( type1->glyph_names ); 434 435 FT_FREE( type1->charstrings_block ); 436 FT_FREE( type1->glyph_names_block ); 437 438 FT_FREE( type1->encoding.char_index ); 439 FT_FREE( type1->encoding.char_name ); 440 FT_FREE( type1->font_name ); 441 442 FT_FREE( face->ttf_data ); 443 444 #if 0 445 /* release afm data if present */ 446 if ( face->afm_data ) 447 T1_Done_AFM( memory, (T1_AFM*)face->afm_data ); 448 #endif 449 450 /* release unicode map, if any */ 451 FT_FREE( face->unicode_map.maps ); 452 face->unicode_map.num_maps = 0; 453 454 face->root.family_name = NULL; 455 face->root.style_name = NULL; 456 } 457 458 459 /************************************************************************** 460 * 461 * @Function: 462 * T42_Driver_Init 463 * 464 * @Description: 465 * Initializes a given Type 42 driver object. 466 * 467 * @Input: 468 * driver :: 469 * A handle to the target driver object. 470 * 471 * @Return: 472 * FreeType error code. 0 means success. 473 */ 474 FT_LOCAL_DEF( FT_Error ) 475 T42_Driver_Init( FT_Module module ) /* T42_Driver */ 476 { 477 T42_Driver driver = (T42_Driver)module; 478 FT_Module ttmodule; 479 480 481 ttmodule = FT_Get_Module( module->library, "truetype" ); 482 if ( !ttmodule ) 483 { 484 FT_ERROR(( "T42_Driver_Init: cannot access `truetype' module\n" )); 485 return FT_THROW( Missing_Module ); 486 } 487 488 driver->ttclazz = (FT_Driver_Class)ttmodule->clazz; 489 490 return FT_Err_Ok; 491 } 492 493 494 FT_LOCAL_DEF( void ) 495 T42_Driver_Done( FT_Module module ) 496 { 497 FT_UNUSED( module ); 498 } 499 500 501 FT_LOCAL_DEF( FT_Error ) 502 T42_Size_Init( FT_Size size ) /* T42_Size */ 503 { 504 T42_Size t42size = (T42_Size)size; 505 FT_Face face = size->face; 506 T42_Face t42face = (T42_Face)face; 507 FT_Size ttsize; 508 FT_Error error; 509 510 511 error = FT_New_Size( t42face->ttf_face, &ttsize ); 512 if ( !error ) 513 { 514 t42size->ttsize = ttsize; 515 FT_Activate_Size( ttsize ); 516 } 517 518 return error; 519 } 520 521 522 FT_LOCAL_DEF( FT_Error ) 523 T42_Size_Request( FT_Size t42size, /* T42_Size */ 524 FT_Size_Request req ) 525 { 526 T42_Size size = (T42_Size)t42size; 527 T42_Face face = (T42_Face)t42size->face; 528 FT_Error error; 529 530 531 FT_Activate_Size( size->ttsize ); 532 533 error = FT_Request_Size( face->ttf_face, req ); 534 if ( !error ) 535 t42size->metrics = face->ttf_face->size->metrics; 536 537 return error; 538 } 539 540 541 FT_LOCAL_DEF( FT_Error ) 542 T42_Size_Select( FT_Size t42size, /* T42_Size */ 543 FT_ULong strike_index ) 544 { 545 T42_Size size = (T42_Size)t42size; 546 T42_Face face = (T42_Face)t42size->face; 547 FT_Error error; 548 549 550 FT_Activate_Size( size->ttsize ); 551 552 error = FT_Select_Size( face->ttf_face, (FT_Int)strike_index ); 553 if ( !error ) 554 t42size->metrics = face->ttf_face->size->metrics; 555 556 return error; 557 558 } 559 560 561 FT_LOCAL_DEF( void ) 562 T42_Size_Done( FT_Size t42size ) /* T42_Size */ 563 { 564 T42_Size size = (T42_Size)t42size; 565 FT_Face face = t42size->face; 566 T42_Face t42face = (T42_Face)face; 567 FT_ListNode node; 568 569 570 node = FT_List_Find( &t42face->ttf_face->sizes_list, size->ttsize ); 571 if ( node ) 572 { 573 FT_Done_Size( size->ttsize ); 574 size->ttsize = NULL; 575 } 576 } 577 578 579 FT_LOCAL_DEF( FT_Error ) 580 T42_GlyphSlot_Init( FT_GlyphSlot t42slot ) /* T42_GlyphSlot */ 581 { 582 T42_GlyphSlot slot = (T42_GlyphSlot)t42slot; 583 FT_Face face = t42slot->face; 584 T42_Face t42face = (T42_Face)face; 585 FT_GlyphSlot ttslot; 586 FT_Memory memory = face->memory; 587 FT_Error error = FT_Err_Ok; 588 589 590 if ( !face->glyph ) 591 { 592 /* First glyph slot for this face */ 593 slot->ttslot = t42face->ttf_face->glyph; 594 } 595 else 596 { 597 error = FT_New_GlyphSlot( t42face->ttf_face, &ttslot ); 598 if ( !error ) 599 slot->ttslot = ttslot; 600 } 601 602 /* share the loader so that the autohinter can see it */ 603 FT_GlyphLoader_Done( slot->ttslot->internal->loader ); 604 FT_FREE( slot->ttslot->internal ); 605 slot->ttslot->internal = t42slot->internal; 606 607 return error; 608 } 609 610 611 FT_LOCAL_DEF( void ) 612 T42_GlyphSlot_Done( FT_GlyphSlot t42slot ) /* T42_GlyphSlot */ 613 { 614 T42_GlyphSlot slot = (T42_GlyphSlot)t42slot; 615 616 617 /* do not destroy the inherited internal structure just yet */ 618 slot->ttslot->internal = NULL; 619 FT_Done_GlyphSlot( slot->ttslot ); 620 } 621 622 623 static void 624 t42_glyphslot_clear( FT_GlyphSlot slot ) 625 { 626 /* free bitmap if needed */ 627 ft_glyphslot_free_bitmap( slot ); 628 629 /* clear all public fields in the glyph slot */ 630 FT_ZERO( &slot->metrics ); 631 FT_ZERO( &slot->outline ); 632 FT_ZERO( &slot->bitmap ); 633 634 slot->bitmap_left = 0; 635 slot->bitmap_top = 0; 636 slot->num_subglyphs = 0; 637 slot->subglyphs = NULL; 638 slot->control_data = NULL; 639 slot->control_len = 0; 640 slot->other = NULL; 641 slot->format = FT_GLYPH_FORMAT_NONE; 642 643 slot->linearHoriAdvance = 0; 644 slot->linearVertAdvance = 0; 645 } 646 647 648 FT_LOCAL_DEF( FT_Error ) 649 T42_GlyphSlot_Load( FT_GlyphSlot glyph, 650 FT_Size size, 651 FT_UInt glyph_index, 652 FT_Int32 load_flags ) 653 { 654 FT_Error error; 655 T42_GlyphSlot t42slot = (T42_GlyphSlot)glyph; 656 T42_Size t42size = (T42_Size)size; 657 T42_Face t42face = (T42_Face)size->face; 658 FT_Driver_Class ttclazz = ((T42_Driver)glyph->face->driver)->ttclazz; 659 660 661 FT_TRACE1(( "T42_GlyphSlot_Load: glyph index %u\n", glyph_index )); 662 663 /* map T42 glyph index to embedded TTF's glyph index */ 664 glyph_index = (FT_UInt)ft_strtol( 665 (const char *)t42face->type1.charstrings[glyph_index], 666 NULL, 10 ); 667 668 t42_glyphslot_clear( t42slot->ttslot ); 669 error = ttclazz->load_glyph( t42slot->ttslot, 670 t42size->ttsize, 671 glyph_index, 672 load_flags | FT_LOAD_NO_BITMAP ); 673 674 if ( !error ) 675 { 676 glyph->metrics = t42slot->ttslot->metrics; 677 678 glyph->linearHoriAdvance = t42slot->ttslot->linearHoriAdvance; 679 glyph->linearVertAdvance = t42slot->ttslot->linearVertAdvance; 680 681 glyph->format = t42slot->ttslot->format; 682 glyph->outline = t42slot->ttslot->outline; 683 684 glyph->bitmap = t42slot->ttslot->bitmap; 685 glyph->bitmap_left = t42slot->ttslot->bitmap_left; 686 glyph->bitmap_top = t42slot->ttslot->bitmap_top; 687 688 glyph->num_subglyphs = t42slot->ttslot->num_subglyphs; 689 glyph->subglyphs = t42slot->ttslot->subglyphs; 690 691 glyph->control_data = t42slot->ttslot->control_data; 692 glyph->control_len = t42slot->ttslot->control_len; 693 } 694 695 return error; 696 } 697 698 699 /* END */