cffobjs.c revision aeb407daf3711a10a27f3bc2223c5eb05158076e
1/***************************************************************************/ 2/* */ 3/* cffobjs.c */ 4/* */ 5/* OpenType objects manager (body). */ 6/* */ 7/* Copyright 1996-2011 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_INTERNAL_DEBUG_H 21#include FT_INTERNAL_CALC_H 22#include FT_INTERNAL_STREAM_H 23#include FT_ERRORS_H 24#include FT_TRUETYPE_IDS_H 25#include FT_TRUETYPE_TAGS_H 26#include FT_INTERNAL_SFNT_H 27#include "cffobjs.h" 28#include "cffload.h" 29#include "cffcmap.h" 30#include "cfferrs.h" 31#include "cffpic.h" 32 33 34 /*************************************************************************/ 35 /* */ 36 /* The macro FT_COMPONENT is used in trace mode. It is an implicit */ 37 /* parameter of the FT_TRACE() and FT_ERROR() macros, used to print/log */ 38 /* messages during execution. */ 39 /* */ 40#undef FT_COMPONENT 41#define FT_COMPONENT trace_cffobjs 42 43 44 /*************************************************************************/ 45 /* */ 46 /* SIZE FUNCTIONS */ 47 /* */ 48 /* Note that we store the global hints in the size's `internal' root */ 49 /* field. */ 50 /* */ 51 /*************************************************************************/ 52 53 54 static PSH_Globals_Funcs 55 cff_size_get_globals_funcs( CFF_Size size ) 56 { 57 CFF_Face face = (CFF_Face)size->root.face; 58 CFF_Font font = (CFF_Font)face->extra.data; 59 PSHinter_Service pshinter = font->pshinter; 60 FT_Module module; 61 62 63 module = FT_Get_Module( size->root.face->driver->root.library, 64 "pshinter" ); 65 return ( module && pshinter && pshinter->get_globals_funcs ) 66 ? pshinter->get_globals_funcs( module ) 67 : 0; 68 } 69 70 71 FT_LOCAL_DEF( void ) 72 cff_size_done( FT_Size cffsize ) /* CFF_Size */ 73 { 74 CFF_Size size = (CFF_Size)cffsize; 75 CFF_Face face = (CFF_Face)size->root.face; 76 CFF_Font font = (CFF_Font)face->extra.data; 77 CFF_Internal internal = (CFF_Internal)cffsize->internal; 78 79 80 if ( internal ) 81 { 82 PSH_Globals_Funcs funcs; 83 84 85 funcs = cff_size_get_globals_funcs( size ); 86 if ( funcs ) 87 { 88 FT_UInt i; 89 90 91 funcs->destroy( internal->topfont ); 92 93 for ( i = font->num_subfonts; i > 0; i-- ) 94 funcs->destroy( internal->subfonts[i - 1] ); 95 } 96 97 /* `internal' is freed by destroy_size (in ftobjs.c) */ 98 } 99 } 100 101 102 /* CFF and Type 1 private dictionaries have slightly different */ 103 /* structures; we need to synthesize a Type 1 dictionary on the fly */ 104 105 static void 106 cff_make_private_dict( CFF_SubFont subfont, 107 PS_Private priv ) 108 { 109 CFF_Private cpriv = &subfont->private_dict; 110 FT_UInt n, count; 111 112 113 FT_MEM_ZERO( priv, sizeof ( *priv ) ); 114 115 count = priv->num_blue_values = cpriv->num_blue_values; 116 for ( n = 0; n < count; n++ ) 117 priv->blue_values[n] = (FT_Short)cpriv->blue_values[n]; 118 119 count = priv->num_other_blues = cpriv->num_other_blues; 120 for ( n = 0; n < count; n++ ) 121 priv->other_blues[n] = (FT_Short)cpriv->other_blues[n]; 122 123 count = priv->num_family_blues = cpriv->num_family_blues; 124 for ( n = 0; n < count; n++ ) 125 priv->family_blues[n] = (FT_Short)cpriv->family_blues[n]; 126 127 count = priv->num_family_other_blues = cpriv->num_family_other_blues; 128 for ( n = 0; n < count; n++ ) 129 priv->family_other_blues[n] = (FT_Short)cpriv->family_other_blues[n]; 130 131 priv->blue_scale = cpriv->blue_scale; 132 priv->blue_shift = (FT_Int)cpriv->blue_shift; 133 priv->blue_fuzz = (FT_Int)cpriv->blue_fuzz; 134 135 priv->standard_width[0] = (FT_UShort)cpriv->standard_width; 136 priv->standard_height[0] = (FT_UShort)cpriv->standard_height; 137 138 count = priv->num_snap_widths = cpriv->num_snap_widths; 139 for ( n = 0; n < count; n++ ) 140 priv->snap_widths[n] = (FT_Short)cpriv->snap_widths[n]; 141 142 count = priv->num_snap_heights = cpriv->num_snap_heights; 143 for ( n = 0; n < count; n++ ) 144 priv->snap_heights[n] = (FT_Short)cpriv->snap_heights[n]; 145 146 priv->force_bold = cpriv->force_bold; 147 priv->language_group = cpriv->language_group; 148 priv->lenIV = cpriv->lenIV; 149 } 150 151 152 FT_LOCAL_DEF( FT_Error ) 153 cff_size_init( FT_Size cffsize ) /* CFF_Size */ 154 { 155 CFF_Size size = (CFF_Size)cffsize; 156 FT_Error error = CFF_Err_Ok; 157 PSH_Globals_Funcs funcs = cff_size_get_globals_funcs( size ); 158 159 160 if ( funcs ) 161 { 162 CFF_Face face = (CFF_Face)cffsize->face; 163 CFF_Font font = (CFF_Font)face->extra.data; 164 CFF_Internal internal = NULL; 165 166 PS_PrivateRec priv; 167 FT_Memory memory = cffsize->face->memory; 168 169 FT_UInt i; 170 171 172 if ( FT_NEW( internal ) ) 173 goto Exit; 174 175 cff_make_private_dict( &font->top_font, &priv ); 176 error = funcs->create( cffsize->face->memory, &priv, 177 &internal->topfont ); 178 if ( error ) 179 goto Exit; 180 181 for ( i = font->num_subfonts; i > 0; i-- ) 182 { 183 CFF_SubFont sub = font->subfonts[i - 1]; 184 185 186 cff_make_private_dict( sub, &priv ); 187 error = funcs->create( cffsize->face->memory, &priv, 188 &internal->subfonts[i - 1] ); 189 if ( error ) 190 goto Exit; 191 } 192 193 cffsize->internal = (FT_Size_Internal)(void*)internal; 194 } 195 196 size->strike_index = 0xFFFFFFFFUL; 197 198 Exit: 199 return error; 200 } 201 202 203#ifdef TT_CONFIG_OPTION_EMBEDDED_BITMAPS 204 205 FT_LOCAL_DEF( FT_Error ) 206 cff_size_select( FT_Size size, 207 FT_ULong strike_index ) 208 { 209 CFF_Size cffsize = (CFF_Size)size; 210 PSH_Globals_Funcs funcs; 211 212 213 cffsize->strike_index = strike_index; 214 215 FT_Select_Metrics( size->face, strike_index ); 216 217 funcs = cff_size_get_globals_funcs( cffsize ); 218 219 if ( funcs ) 220 { 221 CFF_Face face = (CFF_Face)size->face; 222 CFF_Font font = (CFF_Font)face->extra.data; 223 CFF_Internal internal = (CFF_Internal)size->internal; 224 225 FT_ULong top_upm = font->top_font.font_dict.units_per_em; 226 FT_UInt i; 227 228 229 funcs->set_scale( internal->topfont, 230 size->metrics.x_scale, size->metrics.y_scale, 231 0, 0 ); 232 233 for ( i = font->num_subfonts; i > 0; i-- ) 234 { 235 CFF_SubFont sub = font->subfonts[i - 1]; 236 FT_ULong sub_upm = sub->font_dict.units_per_em; 237 FT_Pos x_scale, y_scale; 238 239 240 if ( top_upm != sub_upm ) 241 { 242 x_scale = FT_MulDiv( size->metrics.x_scale, top_upm, sub_upm ); 243 y_scale = FT_MulDiv( size->metrics.y_scale, top_upm, sub_upm ); 244 } 245 else 246 { 247 x_scale = size->metrics.x_scale; 248 y_scale = size->metrics.y_scale; 249 } 250 251 funcs->set_scale( internal->subfonts[i - 1], 252 x_scale, y_scale, 0, 0 ); 253 } 254 } 255 256 return CFF_Err_Ok; 257 } 258 259#endif /* TT_CONFIG_OPTION_EMBEDDED_BITMAPS */ 260 261 262 FT_LOCAL_DEF( FT_Error ) 263 cff_size_request( FT_Size size, 264 FT_Size_Request req ) 265 { 266 CFF_Size cffsize = (CFF_Size)size; 267 PSH_Globals_Funcs funcs; 268 269 270#ifdef TT_CONFIG_OPTION_EMBEDDED_BITMAPS 271 272 if ( FT_HAS_FIXED_SIZES( size->face ) ) 273 { 274 CFF_Face cffface = (CFF_Face)size->face; 275 SFNT_Service sfnt = (SFNT_Service)cffface->sfnt; 276 FT_ULong strike_index; 277 278 279 if ( sfnt->set_sbit_strike( cffface, req, &strike_index ) ) 280 cffsize->strike_index = 0xFFFFFFFFUL; 281 else 282 return cff_size_select( size, strike_index ); 283 } 284 285#endif /* TT_CONFIG_OPTION_EMBEDDED_BITMAPS */ 286 287 FT_Request_Metrics( size->face, req ); 288 289 funcs = cff_size_get_globals_funcs( cffsize ); 290 291 if ( funcs ) 292 { 293 CFF_Face cffface = (CFF_Face)size->face; 294 CFF_Font font = (CFF_Font)cffface->extra.data; 295 CFF_Internal internal = (CFF_Internal)size->internal; 296 297 FT_ULong top_upm = font->top_font.font_dict.units_per_em; 298 FT_UInt i; 299 300 301 funcs->set_scale( internal->topfont, 302 size->metrics.x_scale, size->metrics.y_scale, 303 0, 0 ); 304 305 for ( i = font->num_subfonts; i > 0; i-- ) 306 { 307 CFF_SubFont sub = font->subfonts[i - 1]; 308 FT_ULong sub_upm = sub->font_dict.units_per_em; 309 FT_Pos x_scale, y_scale; 310 311 312 if ( top_upm != sub_upm ) 313 { 314 x_scale = FT_MulDiv( size->metrics.x_scale, top_upm, sub_upm ); 315 y_scale = FT_MulDiv( size->metrics.y_scale, top_upm, sub_upm ); 316 } 317 else 318 { 319 x_scale = size->metrics.x_scale; 320 y_scale = size->metrics.y_scale; 321 } 322 323 funcs->set_scale( internal->subfonts[i - 1], 324 x_scale, y_scale, 0, 0 ); 325 } 326 } 327 328 return CFF_Err_Ok; 329 } 330 331 332 /*************************************************************************/ 333 /* */ 334 /* SLOT FUNCTIONS */ 335 /* */ 336 /*************************************************************************/ 337 338 FT_LOCAL_DEF( void ) 339 cff_slot_done( FT_GlyphSlot slot ) 340 { 341 slot->internal->glyph_hints = 0; 342 } 343 344 345 FT_LOCAL_DEF( FT_Error ) 346 cff_slot_init( FT_GlyphSlot slot ) 347 { 348 CFF_Face face = (CFF_Face)slot->face; 349 CFF_Font font = (CFF_Font)face->extra.data; 350 PSHinter_Service pshinter = font->pshinter; 351 352 353 if ( pshinter ) 354 { 355 FT_Module module; 356 357 358 module = FT_Get_Module( slot->face->driver->root.library, 359 "pshinter" ); 360 if ( module ) 361 { 362 T2_Hints_Funcs funcs; 363 364 365 funcs = pshinter->get_t2_funcs( module ); 366 slot->internal->glyph_hints = (void*)funcs; 367 } 368 } 369 370 return CFF_Err_Ok; 371 } 372 373 374 /*************************************************************************/ 375 /* */ 376 /* FACE FUNCTIONS */ 377 /* */ 378 /*************************************************************************/ 379 380 static FT_String* 381 cff_strcpy( FT_Memory memory, 382 const FT_String* source ) 383 { 384 FT_Error error; 385 FT_String* result; 386 387 388 (void)FT_STRDUP( result, source ); 389 390 FT_UNUSED( error ); 391 392 return result; 393 } 394 395 396 /* Strip all subset prefixes of the form `ABCDEF+'. Usually, there */ 397 /* is only one, but font names like `APCOOG+JFABTD+FuturaBQ-Bold' */ 398 /* have been seen in the wild. */ 399 400 static void 401 remove_subset_prefix( FT_String* name ) 402 { 403 FT_Int32 idx = 0; 404 FT_Int32 length = strlen( name ) + 1; 405 FT_Bool continue_search = 1; 406 407 408 while ( continue_search ) 409 { 410 if ( length >= 7 && name[6] == '+' ) 411 { 412 for ( idx = 0; idx < 6; idx++ ) 413 { 414 /* ASCII uppercase letters */ 415 if ( !( 'A' <= name[idx] && name[idx] <= 'Z' ) ) 416 continue_search = 0; 417 } 418 419 if ( continue_search ) 420 { 421 for ( idx = 7; idx < length; idx++ ) 422 name[idx - 7] = name[idx]; 423 length -= 7; 424 } 425 } 426 else 427 continue_search = 0; 428 } 429 } 430 431 432 /* Remove the style part from the family name (if present). */ 433 434 static void 435 remove_style( FT_String* family_name, 436 const FT_String* style_name ) 437 { 438 FT_Int32 family_name_length, style_name_length; 439 440 441 family_name_length = strlen( family_name ); 442 style_name_length = strlen( style_name ); 443 444 if ( family_name_length > style_name_length ) 445 { 446 FT_Int idx; 447 448 449 for ( idx = 1; idx <= style_name_length; ++idx ) 450 { 451 if ( family_name[family_name_length - idx] != 452 style_name[style_name_length - idx] ) 453 break; 454 } 455 456 if ( idx > style_name_length ) 457 { 458 /* family_name ends with style_name; remove it */ 459 idx = family_name_length - style_name_length - 1; 460 461 /* also remove special characters */ 462 /* between real family name and style */ 463 while ( idx > 0 && 464 ( family_name[idx] == '-' || 465 family_name[idx] == ' ' || 466 family_name[idx] == '_' || 467 family_name[idx] == '+' ) ) 468 --idx; 469 470 if ( idx > 0 ) 471 family_name[idx + 1] = '\0'; 472 } 473 } 474 } 475 476 477 FT_LOCAL_DEF( FT_Error ) 478 cff_face_init( FT_Stream stream, 479 FT_Face cffface, /* CFF_Face */ 480 FT_Int face_index, 481 FT_Int num_params, 482 FT_Parameter* params ) 483 { 484 CFF_Face face = (CFF_Face)cffface; 485 FT_Error error; 486 SFNT_Service sfnt; 487 FT_Service_PsCMaps psnames; 488 PSHinter_Service pshinter; 489 FT_Bool pure_cff = 1; 490 FT_Bool sfnt_format = 0; 491 FT_Library library = cffface->driver->root.library; 492 493 494 sfnt = (SFNT_Service)FT_Get_Module_Interface( 495 library, "sfnt" ); 496 if ( !sfnt ) 497 goto Bad_Format; 498 499 FT_FACE_FIND_GLOBAL_SERVICE( face, psnames, POSTSCRIPT_CMAPS ); 500 501 pshinter = (PSHinter_Service)FT_Get_Module_Interface( 502 library, "pshinter" ); 503 504 /* create input stream from resource */ 505 if ( FT_STREAM_SEEK( 0 ) ) 506 goto Exit; 507 508 /* check whether we have a valid OpenType file */ 509 error = sfnt->init_face( stream, face, face_index, num_params, params ); 510 if ( !error ) 511 { 512 if ( face->format_tag != TTAG_OTTO ) /* `OTTO'; OpenType/CFF font */ 513 { 514 FT_TRACE2(( "[not a valid OpenType/CFF font]\n" )); 515 goto Bad_Format; 516 } 517 518 /* if we are performing a simple font format check, exit immediately */ 519 if ( face_index < 0 ) 520 return CFF_Err_Ok; 521 522 /* UNDOCUMENTED! A CFF in an SFNT can have only a single font. */ 523 if ( face_index > 0 ) 524 { 525 FT_ERROR(( "cff_face_init: invalid face index\n" )); 526 error = CFF_Err_Invalid_Argument; 527 goto Exit; 528 } 529 530 sfnt_format = 1; 531 532 /* now, the font can be either an OpenType/CFF font, or an SVG CEF */ 533 /* font; in the latter case it doesn't have a `head' table */ 534 error = face->goto_table( face, TTAG_head, stream, 0 ); 535 if ( !error ) 536 { 537 pure_cff = 0; 538 539 /* load font directory */ 540 error = sfnt->load_face( stream, face, 0, num_params, params ); 541 if ( error ) 542 goto Exit; 543 } 544 else 545 { 546 /* load the `cmap' table explicitly */ 547 error = sfnt->load_cmap( face, stream ); 548 if ( error ) 549 goto Exit; 550 551 /* XXX: we don't load the GPOS table, as OpenType Layout */ 552 /* support will be added later to a layout library on top of */ 553 /* FreeType 2 */ 554 } 555 556 /* now load the CFF part of the file */ 557 error = face->goto_table( face, TTAG_CFF, stream, 0 ); 558 if ( error ) 559 goto Exit; 560 } 561 else 562 { 563 /* rewind to start of file; we are going to load a pure-CFF font */ 564 if ( FT_STREAM_SEEK( 0 ) ) 565 goto Exit; 566 error = CFF_Err_Ok; 567 } 568 569 /* now load and parse the CFF table in the file */ 570 { 571 CFF_Font cff = NULL; 572 CFF_FontRecDict dict; 573 FT_Memory memory = cffface->memory; 574 FT_Int32 flags; 575 FT_UInt i; 576 577 578 if ( FT_NEW( cff ) ) 579 goto Exit; 580 581 face->extra.data = cff; 582 error = cff_font_load( library, stream, face_index, cff, pure_cff ); 583 if ( error ) 584 goto Exit; 585 586 cff->pshinter = pshinter; 587 cff->psnames = psnames; 588 589 cffface->face_index = face_index; 590 591 /* Complement the root flags with some interesting information. */ 592 /* Note that this is only necessary for pure CFF and CEF fonts; */ 593 /* SFNT based fonts use the `name' table instead. */ 594 595 cffface->num_glyphs = cff->num_glyphs; 596 597 dict = &cff->top_font.font_dict; 598 599 /* we need the `PSNames' module for CFF and CEF formats */ 600 /* which aren't CID-keyed */ 601 if ( dict->cid_registry == 0xFFFFU && !psnames ) 602 { 603 FT_ERROR(( "cff_face_init:" 604 " cannot open CFF & CEF fonts\n" 605 " " 606 " without the `PSNames' module\n" )); 607 goto Bad_Format; 608 } 609 610 if ( !dict->units_per_em ) 611 dict->units_per_em = pure_cff ? 1000 : face->root.units_per_EM; 612 613 /* Normalize the font matrix so that `matrix->xx' is 1; the */ 614 /* scaling is done with `units_per_em' then (at this point, */ 615 /* it already contains the scaling factor, but without */ 616 /* normalization of the matrix). */ 617 /* */ 618 /* Note that the offsets must be expressed in integer font */ 619 /* units. */ 620 621 { 622 FT_Matrix* matrix = &dict->font_matrix; 623 FT_Vector* offset = &dict->font_offset; 624 FT_ULong* upm = &dict->units_per_em; 625 FT_Fixed temp = FT_ABS( matrix->yy ); 626 627 628 if ( temp != 0x10000L ) 629 { 630 *upm = FT_DivFix( *upm, temp ); 631 632 matrix->xx = FT_DivFix( matrix->xx, temp ); 633 matrix->yx = FT_DivFix( matrix->yx, temp ); 634 matrix->xy = FT_DivFix( matrix->xy, temp ); 635 matrix->yy = FT_DivFix( matrix->yy, temp ); 636 offset->x = FT_DivFix( offset->x, temp ); 637 offset->y = FT_DivFix( offset->y, temp ); 638 } 639 640 offset->x >>= 16; 641 offset->y >>= 16; 642 } 643 644 for ( i = cff->num_subfonts; i > 0; i-- ) 645 { 646 CFF_FontRecDict sub = &cff->subfonts[i - 1]->font_dict; 647 CFF_FontRecDict top = &cff->top_font.font_dict; 648 649 FT_Matrix* matrix; 650 FT_Vector* offset; 651 FT_ULong* upm; 652 FT_Fixed temp; 653 654 655 if ( sub->units_per_em ) 656 { 657 FT_Long scaling; 658 659 660 if ( top->units_per_em > 1 && sub->units_per_em > 1 ) 661 scaling = FT_MIN( top->units_per_em, sub->units_per_em ); 662 else 663 scaling = 1; 664 665 FT_Matrix_Multiply_Scaled( &top->font_matrix, 666 &sub->font_matrix, 667 scaling ); 668 FT_Vector_Transform_Scaled( &sub->font_offset, 669 &top->font_matrix, 670 scaling ); 671 672 sub->units_per_em = FT_MulDiv( sub->units_per_em, 673 top->units_per_em, 674 scaling ); 675 } 676 else 677 { 678 sub->font_matrix = top->font_matrix; 679 sub->font_offset = top->font_offset; 680 681 sub->units_per_em = top->units_per_em; 682 } 683 684 matrix = &sub->font_matrix; 685 offset = &sub->font_offset; 686 upm = &sub->units_per_em; 687 temp = FT_ABS( matrix->yy ); 688 689 if ( temp != 0x10000L ) 690 { 691 *upm = FT_DivFix( *upm, temp ); 692 693 /* if *upm is larger than 100*1000 we divide by 1000 -- */ 694 /* this can happen if e.g. there is no top-font FontMatrix */ 695 /* and the subfont FontMatrix already contains the complete */ 696 /* scaling for the subfont (see section 5.11 of the PLRM) */ 697 698 /* 100 is a heuristic value */ 699 700 if ( *upm > 100L * 1000L ) 701 *upm = ( *upm + 500 ) / 1000; 702 703 matrix->xx = FT_DivFix( matrix->xx, temp ); 704 matrix->yx = FT_DivFix( matrix->yx, temp ); 705 matrix->xy = FT_DivFix( matrix->xy, temp ); 706 matrix->yy = FT_DivFix( matrix->yy, temp ); 707 offset->x = FT_DivFix( offset->x, temp ); 708 offset->y = FT_DivFix( offset->y, temp ); 709 } 710 711 offset->x >>= 16; 712 offset->y >>= 16; 713 } 714 715 if ( pure_cff ) 716 { 717 char* style_name = NULL; 718 719 720 /* set up num_faces */ 721 cffface->num_faces = cff->num_faces; 722 723 /* compute number of glyphs */ 724 if ( dict->cid_registry != 0xFFFFU ) 725 cffface->num_glyphs = cff->charset.max_cid + 1; 726 else 727 cffface->num_glyphs = cff->charstrings_index.count; 728 729 /* set global bbox, as well as EM size */ 730 cffface->bbox.xMin = dict->font_bbox.xMin >> 16; 731 cffface->bbox.yMin = dict->font_bbox.yMin >> 16; 732 /* no `U' suffix here to 0xFFFF! */ 733 cffface->bbox.xMax = ( dict->font_bbox.xMax + 0xFFFF ) >> 16; 734 cffface->bbox.yMax = ( dict->font_bbox.yMax + 0xFFFF ) >> 16; 735 736 cffface->units_per_EM = (FT_UShort)( dict->units_per_em ); 737 738 cffface->ascender = (FT_Short)( cffface->bbox.yMax ); 739 cffface->descender = (FT_Short)( cffface->bbox.yMin ); 740 741 cffface->height = (FT_Short)( ( cffface->units_per_EM * 12 ) / 10 ); 742 if ( cffface->height < cffface->ascender - cffface->descender ) 743 cffface->height = (FT_Short)( cffface->ascender - cffface->descender ); 744 745 cffface->underline_position = 746 (FT_Short)( dict->underline_position >> 16 ); 747 cffface->underline_thickness = 748 (FT_Short)( dict->underline_thickness >> 16 ); 749 750 /* retrieve font family & style name */ 751 cffface->family_name = cff_index_get_name( cff, face_index ); 752 if ( cffface->family_name ) 753 { 754 char* full = cff_index_get_sid_string( cff, 755 dict->full_name ); 756 char* fullp = full; 757 char* family = cffface->family_name; 758 char* family_name = NULL; 759 760 761 remove_subset_prefix( cffface->family_name ); 762 763 if ( dict->family_name ) 764 { 765 family_name = cff_index_get_sid_string( cff, 766 dict->family_name ); 767 if ( family_name ) 768 family = family_name; 769 } 770 771 /* We try to extract the style name from the full name. */ 772 /* We need to ignore spaces and dashes during the search. */ 773 if ( full && family ) 774 { 775 while ( *fullp ) 776 { 777 /* skip common characters at the start of both strings */ 778 if ( *fullp == *family ) 779 { 780 family++; 781 fullp++; 782 continue; 783 } 784 785 /* ignore spaces and dashes in full name during comparison */ 786 if ( *fullp == ' ' || *fullp == '-' ) 787 { 788 fullp++; 789 continue; 790 } 791 792 /* ignore spaces and dashes in family name during comparison */ 793 if ( *family == ' ' || *family == '-' ) 794 { 795 family++; 796 continue; 797 } 798 799 if ( !*family && *fullp ) 800 { 801 /* The full name begins with the same characters as the */ 802 /* family name, with spaces and dashes removed. In this */ 803 /* case, the remaining string in `fullp' will be used as */ 804 /* the style name. */ 805 style_name = cff_strcpy( memory, fullp ); 806 807 /* remove the style part from the family name (if present) */ 808 remove_style( cffface->family_name, style_name ); 809 } 810 break; 811 } 812 } 813 } 814 else 815 { 816 char *cid_font_name = 817 cff_index_get_sid_string( cff, 818 dict->cid_font_name ); 819 820 821 /* do we have a `/FontName' for a CID-keyed font? */ 822 if ( cid_font_name ) 823 cffface->family_name = cff_strcpy( memory, cid_font_name ); 824 } 825 826 if ( style_name ) 827 cffface->style_name = style_name; 828 else 829 /* assume "Regular" style if we don't know better */ 830 cffface->style_name = cff_strcpy( memory, (char *)"Regular" ); 831 832 /*******************************************************************/ 833 /* */ 834 /* Compute face flags. */ 835 /* */ 836 flags = (FT_UInt32)( FT_FACE_FLAG_SCALABLE | /* scalable outlines */ 837 FT_FACE_FLAG_HORIZONTAL | /* horizontal data */ 838 FT_FACE_FLAG_HINTER ); /* has native hinter */ 839 840 if ( sfnt_format ) 841 flags |= (FT_UInt32)FT_FACE_FLAG_SFNT; 842 843 /* fixed width font? */ 844 if ( dict->is_fixed_pitch ) 845 flags |= (FT_UInt32)FT_FACE_FLAG_FIXED_WIDTH; 846 847 /* XXX: WE DO NOT SUPPORT KERNING METRICS IN THE GPOS TABLE FOR NOW */ 848#if 0 849 /* kerning available? */ 850 if ( face->kern_pairs ) 851 flags |= (FT_UInt32)FT_FACE_FLAG_KERNING; 852#endif 853 854 cffface->face_flags = flags; 855 856 /*******************************************************************/ 857 /* */ 858 /* Compute style flags. */ 859 /* */ 860 flags = 0; 861 862 if ( dict->italic_angle ) 863 flags |= FT_STYLE_FLAG_ITALIC; 864 865 { 866 char *weight = cff_index_get_sid_string( cff, 867 dict->weight ); 868 869 870 if ( weight ) 871 if ( !ft_strcmp( weight, "Bold" ) || 872 !ft_strcmp( weight, "Black" ) ) 873 flags |= FT_STYLE_FLAG_BOLD; 874 } 875 876 /* double check */ 877 if ( !(flags & FT_STYLE_FLAG_BOLD) && cffface->style_name ) 878 if ( !ft_strncmp( cffface->style_name, "Bold", 4 ) || 879 !ft_strncmp( cffface->style_name, "Black", 5 ) ) 880 flags |= FT_STYLE_FLAG_BOLD; 881 882 cffface->style_flags = flags; 883 } 884 885 886#ifndef FT_CONFIG_OPTION_NO_GLYPH_NAMES 887 /* CID-keyed CFF fonts don't have glyph names -- the SFNT loader */ 888 /* has unset this flag because of the 3.0 `post' table. */ 889 if ( dict->cid_registry == 0xFFFFU ) 890 cffface->face_flags |= FT_FACE_FLAG_GLYPH_NAMES; 891#endif 892 893 if ( dict->cid_registry != 0xFFFFU && pure_cff ) 894 cffface->face_flags |= FT_FACE_FLAG_CID_KEYED; 895 896 897 /*******************************************************************/ 898 /* */ 899 /* Compute char maps. */ 900 /* */ 901 902 /* Try to synthesize a Unicode charmap if there is none available */ 903 /* already. If an OpenType font contains a Unicode "cmap", we */ 904 /* will use it, whatever be in the CFF part of the file. */ 905 { 906 FT_CharMapRec cmaprec; 907 FT_CharMap cmap; 908 FT_UInt nn; 909 CFF_Encoding encoding = &cff->encoding; 910 911 912 for ( nn = 0; nn < (FT_UInt)cffface->num_charmaps; nn++ ) 913 { 914 cmap = cffface->charmaps[nn]; 915 916 /* Windows Unicode? */ 917 if ( cmap->platform_id == TT_PLATFORM_MICROSOFT && 918 cmap->encoding_id == TT_MS_ID_UNICODE_CS ) 919 goto Skip_Unicode; 920 921 /* Apple Unicode platform id? */ 922 if ( cmap->platform_id == TT_PLATFORM_APPLE_UNICODE ) 923 goto Skip_Unicode; /* Apple Unicode */ 924 } 925 926 /* since CID-keyed fonts don't contain glyph names, we can't */ 927 /* construct a cmap */ 928 if ( pure_cff && cff->top_font.font_dict.cid_registry != 0xFFFFU ) 929 goto Exit; 930 931#ifdef FT_MAX_CHARMAP_CACHEABLE 932 if ( nn + 1 > FT_MAX_CHARMAP_CACHEABLE ) 933 { 934 FT_ERROR(( "cff_face_init: no Unicode cmap is found, " 935 "and too many subtables (%d) to add synthesized cmap\n", 936 nn )); 937 goto Exit; 938 } 939#endif 940 941 /* we didn't find a Unicode charmap -- synthesize one */ 942 cmaprec.face = cffface; 943 cmaprec.platform_id = TT_PLATFORM_MICROSOFT; 944 cmaprec.encoding_id = TT_MS_ID_UNICODE_CS; 945 cmaprec.encoding = FT_ENCODING_UNICODE; 946 947 nn = (FT_UInt)cffface->num_charmaps; 948 949 error = FT_CMap_New( &FT_CFF_CMAP_UNICODE_CLASS_REC_GET, NULL, 950 &cmaprec, NULL ); 951 if ( error && FT_Err_No_Unicode_Glyph_Name != error ) 952 goto Exit; 953 error = FT_Err_Ok; 954 955 /* if no Unicode charmap was previously selected, select this one */ 956 if ( cffface->charmap == NULL && nn != (FT_UInt)cffface->num_charmaps ) 957 cffface->charmap = cffface->charmaps[nn]; 958 959 Skip_Unicode: 960#ifdef FT_MAX_CHARMAP_CACHEABLE 961 if ( nn > FT_MAX_CHARMAP_CACHEABLE ) 962 { 963 FT_ERROR(( "cff_face_init: Unicode cmap is found, " 964 "but too many preceding subtables (%d) to access\n", 965 nn - 1 )); 966 goto Exit; 967 } 968#endif 969 if ( encoding->count > 0 ) 970 { 971 FT_CMap_Class clazz; 972 973 974 cmaprec.face = cffface; 975 cmaprec.platform_id = TT_PLATFORM_ADOBE; /* Adobe platform id */ 976 977 if ( encoding->offset == 0 ) 978 { 979 cmaprec.encoding_id = TT_ADOBE_ID_STANDARD; 980 cmaprec.encoding = FT_ENCODING_ADOBE_STANDARD; 981 clazz = &FT_CFF_CMAP_ENCODING_CLASS_REC_GET; 982 } 983 else if ( encoding->offset == 1 ) 984 { 985 cmaprec.encoding_id = TT_ADOBE_ID_EXPERT; 986 cmaprec.encoding = FT_ENCODING_ADOBE_EXPERT; 987 clazz = &FT_CFF_CMAP_ENCODING_CLASS_REC_GET; 988 } 989 else 990 { 991 cmaprec.encoding_id = TT_ADOBE_ID_CUSTOM; 992 cmaprec.encoding = FT_ENCODING_ADOBE_CUSTOM; 993 clazz = &FT_CFF_CMAP_ENCODING_CLASS_REC_GET; 994 } 995 996 error = FT_CMap_New( clazz, NULL, &cmaprec, NULL ); 997 } 998 } 999 } 1000 1001 Exit: 1002 return error; 1003 1004 Bad_Format: 1005 error = CFF_Err_Unknown_File_Format; 1006 goto Exit; 1007 } 1008 1009 1010 FT_LOCAL_DEF( void ) 1011 cff_face_done( FT_Face cffface ) /* CFF_Face */ 1012 { 1013 CFF_Face face = (CFF_Face)cffface; 1014 FT_Memory memory; 1015 SFNT_Service sfnt; 1016 1017 1018 if ( !face ) 1019 return; 1020 1021 memory = cffface->memory; 1022 sfnt = (SFNT_Service)face->sfnt; 1023 1024 if ( sfnt ) 1025 sfnt->done_face( face ); 1026 1027 { 1028 CFF_Font cff = (CFF_Font)face->extra.data; 1029 1030 1031 if ( cff ) 1032 { 1033 cff_font_done( cff ); 1034 FT_FREE( face->extra.data ); 1035 } 1036 } 1037 } 1038 1039 1040 FT_LOCAL_DEF( FT_Error ) 1041 cff_driver_init( FT_Module module ) 1042 { 1043 FT_UNUSED( module ); 1044 1045 return CFF_Err_Ok; 1046 } 1047 1048 1049 FT_LOCAL_DEF( void ) 1050 cff_driver_done( FT_Module module ) 1051 { 1052 FT_UNUSED( module ); 1053 } 1054 1055 1056/* END */ 1057