1 /***************************************************************************/ 2 /* */ 3 /* cffdrivr.c */ 4 /* */ 5 /* OpenType font driver implementation (body). */ 6 /* */ 7 /* Copyright 1996-2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009 by */ 8 /* David Turner, Robert Wilhelm, and Werner Lemberg. */ 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 <ft2build.h> 20 #include FT_FREETYPE_H 21 #include FT_INTERNAL_DEBUG_H 22 #include FT_INTERNAL_STREAM_H 23 #include FT_INTERNAL_SFNT_H 24 #include FT_SERVICE_CID_H 25 #include FT_SERVICE_POSTSCRIPT_CMAPS_H 26 #include FT_SERVICE_POSTSCRIPT_INFO_H 27 #include FT_SERVICE_POSTSCRIPT_NAME_H 28 #include FT_SERVICE_TT_CMAP_H 29 30 #include "cffdrivr.h" 31 #include "cffgload.h" 32 #include "cffload.h" 33 #include "cffcmap.h" 34 #include "cffparse.h" 35 36 #include "cfferrs.h" 37 #include "cffpic.h" 38 39 #include FT_SERVICE_XFREE86_NAME_H 40 #include FT_SERVICE_GLYPH_DICT_H 41 42 43 /*************************************************************************/ 44 /* */ 45 /* The macro FT_COMPONENT is used in trace mode. It is an implicit */ 46 /* parameter of the FT_TRACE() and FT_ERROR() macros, used to print/log */ 47 /* messages during execution. */ 48 /* */ 49 #undef FT_COMPONENT 50 #define FT_COMPONENT trace_cffdriver 51 52 53 /*************************************************************************/ 54 /*************************************************************************/ 55 /*************************************************************************/ 56 /**** ****/ 57 /**** ****/ 58 /**** F A C E S ****/ 59 /**** ****/ 60 /**** ****/ 61 /*************************************************************************/ 62 /*************************************************************************/ 63 /*************************************************************************/ 64 65 66 #undef PAIR_TAG 67 #define PAIR_TAG( left, right ) ( ( (FT_ULong)left << 16 ) | \ 68 (FT_ULong)right ) 69 70 71 /*************************************************************************/ 72 /* */ 73 /* <Function> */ 74 /* cff_get_kerning */ 75 /* */ 76 /* <Description> */ 77 /* A driver method used to return the kerning vector between two */ 78 /* glyphs of the same face. */ 79 /* */ 80 /* <Input> */ 81 /* face :: A handle to the source face object. */ 82 /* */ 83 /* left_glyph :: The index of the left glyph in the kern pair. */ 84 /* */ 85 /* right_glyph :: The index of the right glyph in the kern pair. */ 86 /* */ 87 /* <Output> */ 88 /* kerning :: The kerning vector. This is in font units for */ 89 /* scalable formats, and in pixels for fixed-sizes */ 90 /* formats. */ 91 /* */ 92 /* <Return> */ 93 /* FreeType error code. 0 means success. */ 94 /* */ 95 /* <Note> */ 96 /* Only horizontal layouts (left-to-right & right-to-left) are */ 97 /* supported by this function. Other layouts, or more sophisticated */ 98 /* kernings, are out of scope of this method (the basic driver */ 99 /* interface is meant to be simple). */ 100 /* */ 101 /* They can be implemented by format-specific interfaces. */ 102 /* */ 103 FT_CALLBACK_DEF( FT_Error ) 104 cff_get_kerning( FT_Face ttface, /* TT_Face */ 105 FT_UInt left_glyph, 106 FT_UInt right_glyph, 107 FT_Vector* kerning ) 108 { 109 TT_Face face = (TT_Face)ttface; 110 SFNT_Service sfnt = (SFNT_Service)face->sfnt; 111 112 113 kerning->x = 0; 114 kerning->y = 0; 115 116 if ( sfnt ) 117 kerning->x = sfnt->get_kerning( face, left_glyph, right_glyph ); 118 119 return CFF_Err_Ok; 120 } 121 122 123 #undef PAIR_TAG 124 125 126 /*************************************************************************/ 127 /* */ 128 /* <Function> */ 129 /* Load_Glyph */ 130 /* */ 131 /* <Description> */ 132 /* A driver method used to load a glyph within a given glyph slot. */ 133 /* */ 134 /* <Input> */ 135 /* slot :: A handle to the target slot object where the glyph */ 136 /* will be loaded. */ 137 /* */ 138 /* size :: A handle to the source face size at which the glyph */ 139 /* must be scaled, loaded, etc. */ 140 /* */ 141 /* glyph_index :: The index of the glyph in the font file. */ 142 /* */ 143 /* load_flags :: A flag indicating what to load for this glyph. The */ 144 /* FT_LOAD_??? constants can be used to control the */ 145 /* glyph loading process (e.g., whether the outline */ 146 /* should be scaled, whether to load bitmaps or not, */ 147 /* whether to hint the outline, etc). */ 148 /* */ 149 /* <Return> */ 150 /* FreeType error code. 0 means success. */ 151 /* */ 152 FT_CALLBACK_DEF( FT_Error ) 153 Load_Glyph( FT_GlyphSlot cffslot, /* CFF_GlyphSlot */ 154 FT_Size cffsize, /* CFF_Size */ 155 FT_UInt glyph_index, 156 FT_Int32 load_flags ) 157 { 158 FT_Error error; 159 CFF_GlyphSlot slot = (CFF_GlyphSlot)cffslot; 160 CFF_Size size = (CFF_Size)cffsize; 161 162 163 if ( !slot ) 164 return CFF_Err_Invalid_Slot_Handle; 165 166 /* check whether we want a scaled outline or bitmap */ 167 if ( !size ) 168 load_flags |= FT_LOAD_NO_SCALE | FT_LOAD_NO_HINTING; 169 170 /* reset the size object if necessary */ 171 if ( load_flags & FT_LOAD_NO_SCALE ) 172 size = NULL; 173 174 if ( size ) 175 { 176 /* these two objects must have the same parent */ 177 if ( cffsize->face != cffslot->face ) 178 return CFF_Err_Invalid_Face_Handle; 179 } 180 181 /* now load the glyph outline if necessary */ 182 error = cff_slot_load( slot, size, glyph_index, load_flags ); 183 184 /* force drop-out mode to 2 - irrelevant now */ 185 /* slot->outline.dropout_mode = 2; */ 186 187 return error; 188 } 189 190 191 FT_CALLBACK_DEF( FT_Error ) 192 cff_get_advances( FT_Face face, 193 FT_UInt start, 194 FT_UInt count, 195 FT_Int32 flags, 196 FT_Fixed* advances ) 197 { 198 FT_UInt nn; 199 FT_Error error = CFF_Err_Ok; 200 FT_GlyphSlot slot = face->glyph; 201 202 203 flags |= (FT_UInt32)FT_LOAD_ADVANCE_ONLY; 204 205 for ( nn = 0; nn < count; nn++ ) 206 { 207 error = Load_Glyph( slot, face->size, start + nn, flags ); 208 if ( error ) 209 break; 210 211 advances[nn] = ( flags & FT_LOAD_VERTICAL_LAYOUT ) 212 ? slot->linearVertAdvance 213 : slot->linearHoriAdvance; 214 } 215 216 return error; 217 } 218 219 220 /* 221 * GLYPH DICT SERVICE 222 * 223 */ 224 225 static FT_Error 226 cff_get_glyph_name( CFF_Face face, 227 FT_UInt glyph_index, 228 FT_Pointer buffer, 229 FT_UInt buffer_max ) 230 { 231 CFF_Font font = (CFF_Font)face->extra.data; 232 FT_Memory memory = FT_FACE_MEMORY( face ); 233 FT_String* gname; 234 FT_UShort sid; 235 FT_Service_PsCMaps psnames; 236 FT_Error error; 237 238 239 FT_FACE_FIND_GLOBAL_SERVICE( face, psnames, POSTSCRIPT_CMAPS ); 240 if ( !psnames ) 241 { 242 FT_ERROR(( "cff_get_glyph_name:" 243 " cannot get glyph name from CFF & CEF fonts\n" 244 " " 245 " without the `PSNames' module\n" )); 246 error = CFF_Err_Unknown_File_Format; 247 goto Exit; 248 } 249 250 /* first, locate the sid in the charset table */ 251 sid = font->charset.sids[glyph_index]; 252 253 /* now, lookup the name itself */ 254 gname = cff_index_get_sid_string( &font->string_index, sid, psnames ); 255 256 if ( gname ) 257 FT_STRCPYN( buffer, gname, buffer_max ); 258 259 FT_FREE( gname ); 260 error = CFF_Err_Ok; 261 262 Exit: 263 return error; 264 } 265 266 267 static FT_UInt 268 cff_get_name_index( CFF_Face face, 269 FT_String* glyph_name ) 270 { 271 CFF_Font cff; 272 CFF_Charset charset; 273 FT_Service_PsCMaps psnames; 274 FT_Memory memory = FT_FACE_MEMORY( face ); 275 FT_String* name; 276 FT_UShort sid; 277 FT_UInt i; 278 FT_Int result; 279 280 281 cff = (CFF_FontRec *)face->extra.data; 282 charset = &cff->charset; 283 284 FT_FACE_FIND_GLOBAL_SERVICE( face, psnames, POSTSCRIPT_CMAPS ); 285 if ( !psnames ) 286 return 0; 287 288 for ( i = 0; i < cff->num_glyphs; i++ ) 289 { 290 sid = charset->sids[i]; 291 292 if ( sid > 390 ) 293 name = cff_index_get_name( &cff->string_index, sid - 391 ); 294 else 295 name = (FT_String *)psnames->adobe_std_strings( sid ); 296 297 if ( !name ) 298 continue; 299 300 result = ft_strcmp( glyph_name, name ); 301 302 if ( sid > 390 ) 303 FT_FREE( name ); 304 305 if ( !result ) 306 return i; 307 } 308 309 return 0; 310 } 311 312 313 FT_DEFINE_SERVICE_GLYPHDICTREC(cff_service_glyph_dict, 314 (FT_GlyphDict_GetNameFunc) cff_get_glyph_name, 315 (FT_GlyphDict_NameIndexFunc)cff_get_name_index 316 ) 317 318 319 /* 320 * POSTSCRIPT INFO SERVICE 321 * 322 */ 323 324 static FT_Int 325 cff_ps_has_glyph_names( FT_Face face ) 326 { 327 return ( face->face_flags & FT_FACE_FLAG_GLYPH_NAMES ) > 0; 328 } 329 330 331 static FT_Error 332 cff_ps_get_font_info( CFF_Face face, 333 PS_FontInfoRec* afont_info ) 334 { 335 CFF_Font cff = (CFF_Font)face->extra.data; 336 FT_Error error = FT_Err_Ok; 337 338 339 if ( cff && cff->font_info == NULL ) 340 { 341 CFF_FontRecDict dict = &cff->top_font.font_dict; 342 PS_FontInfoRec *font_info; 343 FT_Memory memory = face->root.memory; 344 FT_Service_PsCMaps psnames = (FT_Service_PsCMaps)cff->psnames; 345 346 347 if ( FT_ALLOC( font_info, sizeof ( *font_info ) ) ) 348 goto Fail; 349 350 font_info->version = cff_index_get_sid_string( &cff->string_index, 351 dict->version, 352 psnames ); 353 font_info->notice = cff_index_get_sid_string( &cff->string_index, 354 dict->notice, 355 psnames ); 356 font_info->full_name = cff_index_get_sid_string( &cff->string_index, 357 dict->full_name, 358 psnames ); 359 font_info->family_name = cff_index_get_sid_string( &cff->string_index, 360 dict->family_name, 361 psnames ); 362 font_info->weight = cff_index_get_sid_string( &cff->string_index, 363 dict->weight, 364 psnames ); 365 font_info->italic_angle = dict->italic_angle; 366 font_info->is_fixed_pitch = dict->is_fixed_pitch; 367 font_info->underline_position = (FT_Short)dict->underline_position; 368 font_info->underline_thickness = (FT_Short)dict->underline_thickness; 369 370 cff->font_info = font_info; 371 } 372 373 if ( cff ) 374 *afont_info = *cff->font_info; 375 376 Fail: 377 return error; 378 } 379 380 381 FT_DEFINE_SERVICE_PSINFOREC(cff_service_ps_info, 382 (PS_GetFontInfoFunc) cff_ps_get_font_info, 383 (PS_GetFontExtraFunc) NULL, 384 (PS_HasGlyphNamesFunc) cff_ps_has_glyph_names, 385 (PS_GetFontPrivateFunc)NULL /* unsupported with CFF fonts */ 386 ) 387 388 389 /* 390 * POSTSCRIPT NAME SERVICE 391 * 392 */ 393 394 static const char* 395 cff_get_ps_name( CFF_Face face ) 396 { 397 CFF_Font cff = (CFF_Font)face->extra.data; 398 399 400 return (const char*)cff->font_name; 401 } 402 403 404 FT_DEFINE_SERVICE_PSFONTNAMEREC(cff_service_ps_name, 405 (FT_PsName_GetFunc)cff_get_ps_name 406 ) 407 408 409 /* 410 * TT CMAP INFO 411 * 412 * If the charmap is a synthetic Unicode encoding cmap or 413 * a Type 1 standard (or expert) encoding cmap, hide TT CMAP INFO 414 * service defined in SFNT module. 415 * 416 * Otherwise call the service function in the sfnt module. 417 * 418 */ 419 static FT_Error 420 cff_get_cmap_info( FT_CharMap charmap, 421 TT_CMapInfo *cmap_info ) 422 { 423 FT_CMap cmap = FT_CMAP( charmap ); 424 FT_Error error = CFF_Err_Ok; 425 FT_Face face = FT_CMAP_FACE( cmap ); 426 FT_Library library = FT_FACE_LIBRARY( face ); 427 428 429 cmap_info->language = 0; 430 cmap_info->format = 0; 431 432 if ( cmap->clazz != &FT_CFF_CMAP_ENCODING_CLASS_REC_GET && 433 cmap->clazz != &FT_CFF_CMAP_UNICODE_CLASS_REC_GET ) 434 { 435 FT_Module sfnt = FT_Get_Module( library, "sfnt" ); 436 FT_Service_TTCMaps service = 437 (FT_Service_TTCMaps)ft_module_get_service( sfnt, 438 FT_SERVICE_ID_TT_CMAP ); 439 440 441 if ( service && service->get_cmap_info ) 442 error = service->get_cmap_info( charmap, cmap_info ); 443 } 444 445 return error; 446 } 447 448 449 FT_DEFINE_SERVICE_TTCMAPSREC(cff_service_get_cmap_info, 450 (TT_CMap_Info_GetFunc)cff_get_cmap_info 451 ) 452 453 454 /* 455 * CID INFO SERVICE 456 * 457 */ 458 static FT_Error 459 cff_get_ros( CFF_Face face, 460 const char* *registry, 461 const char* *ordering, 462 FT_Int *supplement ) 463 { 464 FT_Error error = CFF_Err_Ok; 465 CFF_Font cff = (CFF_Font)face->extra.data; 466 467 468 if ( cff ) 469 { 470 CFF_FontRecDict dict = &cff->top_font.font_dict; 471 FT_Service_PsCMaps psnames = (FT_Service_PsCMaps)cff->psnames; 472 473 474 if ( dict->cid_registry == 0xFFFFU ) 475 { 476 error = CFF_Err_Invalid_Argument; 477 goto Fail; 478 } 479 480 if ( registry ) 481 { 482 if ( cff->registry == NULL ) 483 cff->registry = cff_index_get_sid_string( &cff->string_index, 484 dict->cid_registry, 485 psnames ); 486 *registry = cff->registry; 487 } 488 489 if ( ordering ) 490 { 491 if ( cff->ordering == NULL ) 492 cff->ordering = cff_index_get_sid_string( &cff->string_index, 493 dict->cid_ordering, 494 psnames ); 495 *ordering = cff->ordering; 496 } 497 498 /* 499 * XXX: According to Adobe TechNote #5176, the supplement in CFF 500 * can be a real number. We truncate it to fit public API 501 * since freetype-2.3.6. 502 */ 503 if ( supplement ) 504 { 505 if ( dict->cid_supplement < FT_INT_MIN || 506 dict->cid_supplement > FT_INT_MAX ) 507 FT_TRACE1(( "cff_get_ros: too large supplement %d is truncated\n", 508 dict->cid_supplement )); 509 *supplement = (FT_Int)dict->cid_supplement; 510 } 511 } 512 513 Fail: 514 return error; 515 } 516 517 518 static FT_Error 519 cff_get_is_cid( CFF_Face face, 520 FT_Bool *is_cid ) 521 { 522 FT_Error error = CFF_Err_Ok; 523 CFF_Font cff = (CFF_Font)face->extra.data; 524 525 526 *is_cid = 0; 527 528 if ( cff ) 529 { 530 CFF_FontRecDict dict = &cff->top_font.font_dict; 531 532 533 if ( dict->cid_registry != 0xFFFFU ) 534 *is_cid = 1; 535 } 536 537 return error; 538 } 539 540 541 static FT_Error 542 cff_get_cid_from_glyph_index( CFF_Face face, 543 FT_UInt glyph_index, 544 FT_UInt *cid ) 545 { 546 FT_Error error = CFF_Err_Ok; 547 CFF_Font cff; 548 549 550 cff = (CFF_Font)face->extra.data; 551 552 if ( cff ) 553 { 554 FT_UInt c; 555 CFF_FontRecDict dict = &cff->top_font.font_dict; 556 557 558 if ( dict->cid_registry == 0xFFFFU ) 559 { 560 error = CFF_Err_Invalid_Argument; 561 goto Fail; 562 } 563 564 if ( glyph_index > cff->num_glyphs ) 565 { 566 error = CFF_Err_Invalid_Argument; 567 goto Fail; 568 } 569 570 c = cff->charset.sids[glyph_index]; 571 572 if ( cid ) 573 *cid = c; 574 } 575 576 Fail: 577 return error; 578 } 579 580 581 FT_DEFINE_SERVICE_CIDREC(cff_service_cid_info, 582 (FT_CID_GetRegistryOrderingSupplementFunc)cff_get_ros, 583 (FT_CID_GetIsInternallyCIDKeyedFunc) cff_get_is_cid, 584 (FT_CID_GetCIDFromGlyphIndexFunc) cff_get_cid_from_glyph_index 585 ) 586 587 588 /*************************************************************************/ 589 /*************************************************************************/ 590 /*************************************************************************/ 591 /**** ****/ 592 /**** ****/ 593 /**** D R I V E R I N T E R F A C E ****/ 594 /**** ****/ 595 /**** ****/ 596 /*************************************************************************/ 597 /*************************************************************************/ 598 /*************************************************************************/ 599 #ifndef FT_CONFIG_OPTION_NO_GLYPH_NAMES 600 FT_DEFINE_SERVICEDESCREC6(cff_services, 601 FT_SERVICE_ID_XF86_NAME, FT_XF86_FORMAT_CFF, 602 FT_SERVICE_ID_POSTSCRIPT_INFO, &FT_CFF_SERVICE_PS_INFO_GET, 603 FT_SERVICE_ID_POSTSCRIPT_FONT_NAME, &FT_CFF_SERVICE_PS_NAME_GET, 604 FT_SERVICE_ID_GLYPH_DICT, &FT_CFF_SERVICE_GLYPH_DICT_GET, 605 FT_SERVICE_ID_TT_CMAP, &FT_CFF_SERVICE_GET_CMAP_INFO_GET, 606 FT_SERVICE_ID_CID, &FT_CFF_SERVICE_CID_INFO_GET 607 ) 608 #else 609 FT_DEFINE_SERVICEDESCREC5(cff_services, 610 FT_SERVICE_ID_XF86_NAME, FT_XF86_FORMAT_CFF, 611 FT_SERVICE_ID_POSTSCRIPT_INFO, &FT_CFF_SERVICE_PS_INFO_GET, 612 FT_SERVICE_ID_POSTSCRIPT_FONT_NAME, &FT_CFF_SERVICE_PS_NAME_GET, 613 FT_SERVICE_ID_TT_CMAP, &FT_CFF_SERVICE_GET_CMAP_INFO_GET, 614 FT_SERVICE_ID_CID, &FT_CFF_SERVICE_CID_INFO_GET 615 ) 616 #endif 617 618 FT_CALLBACK_DEF( FT_Module_Interface ) 619 cff_get_interface( FT_Module driver, /* CFF_Driver */ 620 const char* module_interface ) 621 { 622 FT_Module sfnt; 623 FT_Module_Interface result; 624 625 626 result = ft_service_list_lookup( FT_CFF_SERVICES_GET, module_interface ); 627 if ( result != NULL ) 628 return result; 629 630 if ( !driver ) 631 return NULL; 632 633 /* we pass our request to the `sfnt' module */ 634 sfnt = FT_Get_Module( driver->library, "sfnt" ); 635 636 return sfnt ? sfnt->clazz->get_interface( sfnt, module_interface ) : 0; 637 } 638 639 640 /* The FT_DriverInterface structure is defined in ftdriver.h. */ 641 642 #ifdef TT_CONFIG_OPTION_EMBEDDED_BITMAPS 643 #define CFF_SIZE_SELECT cff_size_select 644 #else 645 #define CFF_SIZE_SELECT 0 646 #endif 647 648 FT_DEFINE_DRIVER(cff_driver_class, 649 FT_MODULE_FONT_DRIVER | 650 FT_MODULE_DRIVER_SCALABLE | 651 FT_MODULE_DRIVER_HAS_HINTER, 652 653 sizeof( CFF_DriverRec ), 654 "cff", 655 0x10000L, 656 0x20000L, 657 658 0, /* module-specific interface */ 659 660 cff_driver_init, 661 cff_driver_done, 662 cff_get_interface, 663 664 /* now the specific driver fields */ 665 sizeof( TT_FaceRec ), 666 sizeof( CFF_SizeRec ), 667 sizeof( CFF_GlyphSlotRec ), 668 669 cff_face_init, 670 cff_face_done, 671 cff_size_init, 672 cff_size_done, 673 cff_slot_init, 674 cff_slot_done, 675 676 ft_stub_set_char_sizes, /* FT_CONFIG_OPTION_OLD_INTERNALS */ 677 ft_stub_set_pixel_sizes, /* FT_CONFIG_OPTION_OLD_INTERNALS */ 678 679 Load_Glyph, 680 681 cff_get_kerning, 682 0, /* FT_Face_AttachFunc */ 683 cff_get_advances, /* FT_Face_GetAdvancesFunc */ 684 685 cff_size_request, 686 687 CFF_SIZE_SELECT 688 ) 689 690 691 /* END */ 692
