1 /**************************************************************************** 2 * 3 * t1driver.c 4 * 5 * Type 1 driver interface (body). 6 * 7 * Copyright 1996-2018 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 "t1driver.h" 21 #include "t1gload.h" 22 #include "t1load.h" 23 24 #include "t1errors.h" 25 26 #ifndef T1_CONFIG_OPTION_NO_AFM 27 #include "t1afm.h" 28 #endif 29 30 #include FT_INTERNAL_DEBUG_H 31 #include FT_INTERNAL_STREAM_H 32 #include FT_INTERNAL_HASH_H 33 #include FT_INTERNAL_POSTSCRIPT_PROPS_H 34 #include FT_DRIVER_H 35 36 #include FT_SERVICE_MULTIPLE_MASTERS_H 37 #include FT_SERVICE_GLYPH_DICT_H 38 #include FT_SERVICE_FONT_FORMAT_H 39 #include FT_SERVICE_POSTSCRIPT_NAME_H 40 #include FT_SERVICE_POSTSCRIPT_CMAPS_H 41 #include FT_SERVICE_POSTSCRIPT_INFO_H 42 #include FT_SERVICE_PROPERTIES_H 43 #include FT_SERVICE_KERNING_H 44 45 46 /************************************************************************** 47 * 48 * The macro FT_COMPONENT is used in trace mode. It is an implicit 49 * parameter of the FT_TRACE() and FT_ERROR() macros, used to print/log 50 * messages during execution. 51 */ 52 #undef FT_COMPONENT 53 #define FT_COMPONENT trace_t1driver 54 55 /* 56 * GLYPH DICT SERVICE 57 * 58 */ 59 60 static FT_Error 61 t1_get_glyph_name( T1_Face face, 62 FT_UInt glyph_index, 63 FT_Pointer buffer, 64 FT_UInt buffer_max ) 65 { 66 FT_STRCPYN( buffer, face->type1.glyph_names[glyph_index], buffer_max ); 67 68 return FT_Err_Ok; 69 } 70 71 72 static FT_UInt 73 t1_get_name_index( T1_Face face, 74 FT_String* glyph_name ) 75 { 76 FT_Int i; 77 78 79 for ( i = 0; i < face->type1.num_glyphs; i++ ) 80 { 81 FT_String* gname = face->type1.glyph_names[i]; 82 83 84 if ( !ft_strcmp( glyph_name, gname ) ) 85 return (FT_UInt)i; 86 } 87 88 return 0; 89 } 90 91 92 static const FT_Service_GlyphDictRec t1_service_glyph_dict = 93 { 94 (FT_GlyphDict_GetNameFunc) t1_get_glyph_name, /* get_name */ 95 (FT_GlyphDict_NameIndexFunc)t1_get_name_index /* name_index */ 96 }; 97 98 99 /* 100 * POSTSCRIPT NAME SERVICE 101 * 102 */ 103 104 static const char* 105 t1_get_ps_name( T1_Face face ) 106 { 107 return (const char*) face->type1.font_name; 108 } 109 110 111 static const FT_Service_PsFontNameRec t1_service_ps_name = 112 { 113 (FT_PsName_GetFunc)t1_get_ps_name /* get_ps_font_name */ 114 }; 115 116 117 /* 118 * MULTIPLE MASTERS SERVICE 119 * 120 */ 121 122 #ifndef T1_CONFIG_OPTION_NO_MM_SUPPORT 123 static const FT_Service_MultiMastersRec t1_service_multi_masters = 124 { 125 (FT_Get_MM_Func) T1_Get_Multi_Master, /* get_mm */ 126 (FT_Set_MM_Design_Func) T1_Set_MM_Design, /* set_mm_design */ 127 (FT_Set_MM_Blend_Func) T1_Set_MM_Blend, /* set_mm_blend */ 128 (FT_Get_MM_Blend_Func) T1_Get_MM_Blend, /* get_mm_blend */ 129 (FT_Get_MM_Var_Func) T1_Get_MM_Var, /* get_mm_var */ 130 (FT_Set_Var_Design_Func)T1_Set_Var_Design, /* set_var_design */ 131 (FT_Get_Var_Design_Func)T1_Get_Var_Design, /* get_var_design */ 132 (FT_Set_Instance_Func) T1_Reset_MM_Blend, /* set_instance */ 133 134 (FT_Get_Var_Blend_Func) NULL, /* get_var_blend */ 135 (FT_Done_Blend_Func) T1_Done_Blend /* done_blend */ 136 }; 137 #endif 138 139 140 /* 141 * POSTSCRIPT INFO SERVICE 142 * 143 */ 144 145 static FT_Error 146 t1_ps_get_font_info( FT_Face face, 147 PS_FontInfoRec* afont_info ) 148 { 149 *afont_info = ((T1_Face)face)->type1.font_info; 150 151 return FT_Err_Ok; 152 } 153 154 155 static FT_Error 156 t1_ps_get_font_extra( FT_Face face, 157 PS_FontExtraRec* afont_extra ) 158 { 159 *afont_extra = ((T1_Face)face)->type1.font_extra; 160 161 return FT_Err_Ok; 162 } 163 164 165 static FT_Int 166 t1_ps_has_glyph_names( FT_Face face ) 167 { 168 FT_UNUSED( face ); 169 170 return 1; 171 } 172 173 174 static FT_Error 175 t1_ps_get_font_private( FT_Face face, 176 PS_PrivateRec* afont_private ) 177 { 178 *afont_private = ((T1_Face)face)->type1.private_dict; 179 180 return FT_Err_Ok; 181 } 182 183 184 static FT_Long 185 t1_ps_get_font_value( FT_Face face, 186 PS_Dict_Keys key, 187 FT_UInt idx, 188 void *value, 189 FT_Long value_len_ ) 190 { 191 FT_ULong retval = 0; /* always >= 1 if valid */ 192 FT_ULong value_len = value_len_ < 0 ? 0 : (FT_ULong)value_len_; 193 194 T1_Face t1face = (T1_Face)face; 195 T1_Font type1 = &t1face->type1; 196 197 198 switch ( key ) 199 { 200 case PS_DICT_FONT_TYPE: 201 retval = sizeof ( type1->font_type ); 202 if ( value && value_len >= retval ) 203 *((FT_Byte *)value) = type1->font_type; 204 break; 205 206 case PS_DICT_FONT_MATRIX: 207 if ( idx < sizeof ( type1->font_matrix ) / 208 sizeof ( type1->font_matrix.xx ) ) 209 { 210 FT_Fixed val = 0; 211 212 213 retval = sizeof ( val ); 214 if ( value && value_len >= retval ) 215 { 216 switch ( idx ) 217 { 218 case 0: 219 val = type1->font_matrix.xx; 220 break; 221 case 1: 222 val = type1->font_matrix.xy; 223 break; 224 case 2: 225 val = type1->font_matrix.yx; 226 break; 227 case 3: 228 val = type1->font_matrix.yy; 229 break; 230 } 231 *((FT_Fixed *)value) = val; 232 } 233 } 234 break; 235 236 case PS_DICT_FONT_BBOX: 237 if ( idx < sizeof ( type1->font_bbox ) / 238 sizeof ( type1->font_bbox.xMin ) ) 239 { 240 FT_Fixed val = 0; 241 242 243 retval = sizeof ( val ); 244 if ( value && value_len >= retval ) 245 { 246 switch ( idx ) 247 { 248 case 0: 249 val = type1->font_bbox.xMin; 250 break; 251 case 1: 252 val = type1->font_bbox.yMin; 253 break; 254 case 2: 255 val = type1->font_bbox.xMax; 256 break; 257 case 3: 258 val = type1->font_bbox.yMax; 259 break; 260 } 261 *((FT_Fixed *)value) = val; 262 } 263 } 264 break; 265 266 case PS_DICT_PAINT_TYPE: 267 retval = sizeof ( type1->paint_type ); 268 if ( value && value_len >= retval ) 269 *((FT_Byte *)value) = type1->paint_type; 270 break; 271 272 case PS_DICT_FONT_NAME: 273 if ( type1->font_name ) 274 { 275 retval = ft_strlen( type1->font_name ) + 1; 276 if ( value && value_len >= retval ) 277 ft_memcpy( value, (void *)( type1->font_name ), retval ); 278 } 279 break; 280 281 case PS_DICT_UNIQUE_ID: 282 retval = sizeof ( type1->private_dict.unique_id ); 283 if ( value && value_len >= retval ) 284 *((FT_Int *)value) = type1->private_dict.unique_id; 285 break; 286 287 case PS_DICT_NUM_CHAR_STRINGS: 288 retval = sizeof ( type1->num_glyphs ); 289 if ( value && value_len >= retval ) 290 *((FT_Int *)value) = type1->num_glyphs; 291 break; 292 293 case PS_DICT_CHAR_STRING_KEY: 294 if ( idx < (FT_UInt)type1->num_glyphs ) 295 { 296 retval = ft_strlen( type1->glyph_names[idx] ) + 1; 297 if ( value && value_len >= retval ) 298 { 299 ft_memcpy( value, (void *)( type1->glyph_names[idx] ), retval ); 300 ((FT_Char *)value)[retval - 1] = (FT_Char)'\0'; 301 } 302 } 303 break; 304 305 case PS_DICT_CHAR_STRING: 306 if ( idx < (FT_UInt)type1->num_glyphs ) 307 { 308 retval = type1->charstrings_len[idx] + 1; 309 if ( value && value_len >= retval ) 310 { 311 ft_memcpy( value, (void *)( type1->charstrings[idx] ), 312 retval - 1 ); 313 ((FT_Char *)value)[retval - 1] = (FT_Char)'\0'; 314 } 315 } 316 break; 317 318 case PS_DICT_ENCODING_TYPE: 319 retval = sizeof ( type1->encoding_type ); 320 if ( value && value_len >= retval ) 321 *((T1_EncodingType *)value) = type1->encoding_type; 322 break; 323 324 case PS_DICT_ENCODING_ENTRY: 325 if ( type1->encoding_type == T1_ENCODING_TYPE_ARRAY && 326 idx < (FT_UInt)type1->encoding.num_chars ) 327 { 328 retval = ft_strlen( type1->encoding.char_name[idx] ) + 1; 329 if ( value && value_len >= retval ) 330 { 331 ft_memcpy( value, (void *)( type1->encoding.char_name[idx] ), 332 retval - 1 ); 333 ((FT_Char *)value)[retval - 1] = (FT_Char)'\0'; 334 } 335 } 336 break; 337 338 case PS_DICT_NUM_SUBRS: 339 retval = sizeof ( type1->num_subrs ); 340 if ( value && value_len >= retval ) 341 *((FT_Int *)value) = type1->num_subrs; 342 break; 343 344 case PS_DICT_SUBR: 345 { 346 FT_Bool ok = 0; 347 348 349 if ( type1->subrs_hash ) 350 { 351 /* convert subr index to array index */ 352 size_t* val = ft_hash_num_lookup( (FT_Int)idx, 353 type1->subrs_hash ); 354 355 356 if ( val ) 357 { 358 idx = *val; 359 ok = 1; 360 } 361 } 362 else 363 { 364 if ( idx < (FT_UInt)type1->num_subrs ) 365 ok = 1; 366 } 367 368 if ( ok && type1->subrs ) 369 { 370 retval = type1->subrs_len[idx] + 1; 371 if ( value && value_len >= retval ) 372 { 373 ft_memcpy( value, (void *)( type1->subrs[idx] ), retval - 1 ); 374 ((FT_Char *)value)[retval - 1] = (FT_Char)'\0'; 375 } 376 } 377 } 378 break; 379 380 case PS_DICT_STD_HW: 381 retval = sizeof ( type1->private_dict.standard_width[0] ); 382 if ( value && value_len >= retval ) 383 *((FT_UShort *)value) = type1->private_dict.standard_width[0]; 384 break; 385 386 case PS_DICT_STD_VW: 387 retval = sizeof ( type1->private_dict.standard_height[0] ); 388 if ( value && value_len >= retval ) 389 *((FT_UShort *)value) = type1->private_dict.standard_height[0]; 390 break; 391 392 case PS_DICT_NUM_BLUE_VALUES: 393 retval = sizeof ( type1->private_dict.num_blue_values ); 394 if ( value && value_len >= retval ) 395 *((FT_Byte *)value) = type1->private_dict.num_blue_values; 396 break; 397 398 case PS_DICT_BLUE_VALUE: 399 if ( idx < type1->private_dict.num_blue_values ) 400 { 401 retval = sizeof ( type1->private_dict.blue_values[idx] ); 402 if ( value && value_len >= retval ) 403 *((FT_Short *)value) = type1->private_dict.blue_values[idx]; 404 } 405 break; 406 407 case PS_DICT_BLUE_SCALE: 408 retval = sizeof ( type1->private_dict.blue_scale ); 409 if ( value && value_len >= retval ) 410 *((FT_Fixed *)value) = type1->private_dict.blue_scale; 411 break; 412 413 case PS_DICT_BLUE_FUZZ: 414 retval = sizeof ( type1->private_dict.blue_fuzz ); 415 if ( value && value_len >= retval ) 416 *((FT_Int *)value) = type1->private_dict.blue_fuzz; 417 break; 418 419 case PS_DICT_BLUE_SHIFT: 420 retval = sizeof ( type1->private_dict.blue_shift ); 421 if ( value && value_len >= retval ) 422 *((FT_Int *)value) = type1->private_dict.blue_shift; 423 break; 424 425 case PS_DICT_NUM_OTHER_BLUES: 426 retval = sizeof ( type1->private_dict.num_other_blues ); 427 if ( value && value_len >= retval ) 428 *((FT_Byte *)value) = type1->private_dict.num_other_blues; 429 break; 430 431 case PS_DICT_OTHER_BLUE: 432 if ( idx < type1->private_dict.num_other_blues ) 433 { 434 retval = sizeof ( type1->private_dict.other_blues[idx] ); 435 if ( value && value_len >= retval ) 436 *((FT_Short *)value) = type1->private_dict.other_blues[idx]; 437 } 438 break; 439 440 case PS_DICT_NUM_FAMILY_BLUES: 441 retval = sizeof ( type1->private_dict.num_family_blues ); 442 if ( value && value_len >= retval ) 443 *((FT_Byte *)value) = type1->private_dict.num_family_blues; 444 break; 445 446 case PS_DICT_FAMILY_BLUE: 447 if ( idx < type1->private_dict.num_family_blues ) 448 { 449 retval = sizeof ( type1->private_dict.family_blues[idx] ); 450 if ( value && value_len >= retval ) 451 *((FT_Short *)value) = type1->private_dict.family_blues[idx]; 452 } 453 break; 454 455 case PS_DICT_NUM_FAMILY_OTHER_BLUES: 456 retval = sizeof ( type1->private_dict.num_family_other_blues ); 457 if ( value && value_len >= retval ) 458 *((FT_Byte *)value) = type1->private_dict.num_family_other_blues; 459 break; 460 461 case PS_DICT_FAMILY_OTHER_BLUE: 462 if ( idx < type1->private_dict.num_family_other_blues ) 463 { 464 retval = sizeof ( type1->private_dict.family_other_blues[idx] ); 465 if ( value && value_len >= retval ) 466 *((FT_Short *)value) = type1->private_dict.family_other_blues[idx]; 467 } 468 break; 469 470 case PS_DICT_NUM_STEM_SNAP_H: 471 retval = sizeof ( type1->private_dict.num_snap_widths ); 472 if ( value && value_len >= retval ) 473 *((FT_Byte *)value) = type1->private_dict.num_snap_widths; 474 break; 475 476 case PS_DICT_STEM_SNAP_H: 477 if ( idx < type1->private_dict.num_snap_widths ) 478 { 479 retval = sizeof ( type1->private_dict.snap_widths[idx] ); 480 if ( value && value_len >= retval ) 481 *((FT_Short *)value) = type1->private_dict.snap_widths[idx]; 482 } 483 break; 484 485 case PS_DICT_NUM_STEM_SNAP_V: 486 retval = sizeof ( type1->private_dict.num_snap_heights ); 487 if ( value && value_len >= retval ) 488 *((FT_Byte *)value) = type1->private_dict.num_snap_heights; 489 break; 490 491 case PS_DICT_STEM_SNAP_V: 492 if ( idx < type1->private_dict.num_snap_heights ) 493 { 494 retval = sizeof ( type1->private_dict.snap_heights[idx] ); 495 if ( value && value_len >= retval ) 496 *((FT_Short *)value) = type1->private_dict.snap_heights[idx]; 497 } 498 break; 499 500 case PS_DICT_RND_STEM_UP: 501 retval = sizeof ( type1->private_dict.round_stem_up ); 502 if ( value && value_len >= retval ) 503 *((FT_Bool *)value) = type1->private_dict.round_stem_up; 504 break; 505 506 case PS_DICT_FORCE_BOLD: 507 retval = sizeof ( type1->private_dict.force_bold ); 508 if ( value && value_len >= retval ) 509 *((FT_Bool *)value) = type1->private_dict.force_bold; 510 break; 511 512 case PS_DICT_MIN_FEATURE: 513 if ( idx < sizeof ( type1->private_dict.min_feature ) / 514 sizeof ( type1->private_dict.min_feature[0] ) ) 515 { 516 retval = sizeof ( type1->private_dict.min_feature[idx] ); 517 if ( value && value_len >= retval ) 518 *((FT_Short *)value) = type1->private_dict.min_feature[idx]; 519 } 520 break; 521 522 case PS_DICT_LEN_IV: 523 retval = sizeof ( type1->private_dict.lenIV ); 524 if ( value && value_len >= retval ) 525 *((FT_Int *)value) = type1->private_dict.lenIV; 526 break; 527 528 case PS_DICT_PASSWORD: 529 retval = sizeof ( type1->private_dict.password ); 530 if ( value && value_len >= retval ) 531 *((FT_Long *)value) = type1->private_dict.password; 532 break; 533 534 case PS_DICT_LANGUAGE_GROUP: 535 retval = sizeof ( type1->private_dict.language_group ); 536 if ( value && value_len >= retval ) 537 *((FT_Long *)value) = type1->private_dict.language_group; 538 break; 539 540 case PS_DICT_IS_FIXED_PITCH: 541 retval = sizeof ( type1->font_info.is_fixed_pitch ); 542 if ( value && value_len >= retval ) 543 *((FT_Bool *)value) = type1->font_info.is_fixed_pitch; 544 break; 545 546 case PS_DICT_UNDERLINE_POSITION: 547 retval = sizeof ( type1->font_info.underline_position ); 548 if ( value && value_len >= retval ) 549 *((FT_Short *)value) = type1->font_info.underline_position; 550 break; 551 552 case PS_DICT_UNDERLINE_THICKNESS: 553 retval = sizeof ( type1->font_info.underline_thickness ); 554 if ( value && value_len >= retval ) 555 *((FT_UShort *)value) = type1->font_info.underline_thickness; 556 break; 557 558 case PS_DICT_FS_TYPE: 559 retval = sizeof ( type1->font_extra.fs_type ); 560 if ( value && value_len >= retval ) 561 *((FT_UShort *)value) = type1->font_extra.fs_type; 562 break; 563 564 case PS_DICT_VERSION: 565 if ( type1->font_info.version ) 566 { 567 retval = ft_strlen( type1->font_info.version ) + 1; 568 if ( value && value_len >= retval ) 569 ft_memcpy( value, (void *)( type1->font_info.version ), retval ); 570 } 571 break; 572 573 case PS_DICT_NOTICE: 574 if ( type1->font_info.notice ) 575 { 576 retval = ft_strlen( type1->font_info.notice ) + 1; 577 if ( value && value_len >= retval ) 578 ft_memcpy( value, (void *)( type1->font_info.notice ), retval ); 579 } 580 break; 581 582 case PS_DICT_FULL_NAME: 583 if ( type1->font_info.full_name ) 584 { 585 retval = ft_strlen( type1->font_info.full_name ) + 1; 586 if ( value && value_len >= retval ) 587 ft_memcpy( value, (void *)( type1->font_info.full_name ), retval ); 588 } 589 break; 590 591 case PS_DICT_FAMILY_NAME: 592 if ( type1->font_info.family_name ) 593 { 594 retval = ft_strlen( type1->font_info.family_name ) + 1; 595 if ( value && value_len >= retval ) 596 ft_memcpy( value, (void *)( type1->font_info.family_name ), 597 retval ); 598 } 599 break; 600 601 case PS_DICT_WEIGHT: 602 if ( type1->font_info.weight ) 603 { 604 retval = ft_strlen( type1->font_info.weight ) + 1; 605 if ( value && value_len >= retval ) 606 ft_memcpy( value, (void *)( type1->font_info.weight ), retval ); 607 } 608 break; 609 610 case PS_DICT_ITALIC_ANGLE: 611 retval = sizeof ( type1->font_info.italic_angle ); 612 if ( value && value_len >= retval ) 613 *((FT_Long *)value) = type1->font_info.italic_angle; 614 break; 615 } 616 617 return retval == 0 ? -1 : (FT_Long)retval; 618 } 619 620 621 static const FT_Service_PsInfoRec t1_service_ps_info = 622 { 623 (PS_GetFontInfoFunc) t1_ps_get_font_info, /* ps_get_font_info */ 624 (PS_GetFontExtraFunc) t1_ps_get_font_extra, /* ps_get_font_extra */ 625 (PS_HasGlyphNamesFunc) t1_ps_has_glyph_names, /* ps_has_glyph_names */ 626 (PS_GetFontPrivateFunc)t1_ps_get_font_private, /* ps_get_font_private */ 627 (PS_GetFontValueFunc) t1_ps_get_font_value, /* ps_get_font_value */ 628 }; 629 630 631 #ifndef T1_CONFIG_OPTION_NO_AFM 632 static const FT_Service_KerningRec t1_service_kerning = 633 { 634 T1_Get_Track_Kerning, /* get_track */ 635 }; 636 #endif 637 638 639 /* 640 * PROPERTY SERVICE 641 * 642 */ 643 644 FT_DEFINE_SERVICE_PROPERTIESREC( 645 t1_service_properties, 646 647 (FT_Properties_SetFunc)ps_property_set, /* set_property */ 648 (FT_Properties_GetFunc)ps_property_get ) /* get_property */ 649 650 651 /* 652 * SERVICE LIST 653 * 654 */ 655 656 static const FT_ServiceDescRec t1_services[] = 657 { 658 { FT_SERVICE_ID_POSTSCRIPT_FONT_NAME, &t1_service_ps_name }, 659 { FT_SERVICE_ID_GLYPH_DICT, &t1_service_glyph_dict }, 660 { FT_SERVICE_ID_FONT_FORMAT, FT_FONT_FORMAT_TYPE_1 }, 661 { FT_SERVICE_ID_POSTSCRIPT_INFO, &t1_service_ps_info }, 662 { FT_SERVICE_ID_PROPERTIES, &t1_service_properties }, 663 664 #ifndef T1_CONFIG_OPTION_NO_AFM 665 { FT_SERVICE_ID_KERNING, &t1_service_kerning }, 666 #endif 667 668 #ifndef T1_CONFIG_OPTION_NO_MM_SUPPORT 669 { FT_SERVICE_ID_MULTI_MASTERS, &t1_service_multi_masters }, 670 #endif 671 { NULL, NULL } 672 }; 673 674 675 FT_CALLBACK_DEF( FT_Module_Interface ) 676 Get_Interface( FT_Module module, 677 const FT_String* t1_interface ) 678 { 679 FT_UNUSED( module ); 680 681 return ft_service_list_lookup( t1_services, t1_interface ); 682 } 683 684 685 #ifndef T1_CONFIG_OPTION_NO_AFM 686 687 /************************************************************************** 688 * 689 * @Function: 690 * Get_Kerning 691 * 692 * @Description: 693 * A driver method used to return the kerning vector between two 694 * glyphs of the same face. 695 * 696 * @Input: 697 * face :: 698 * A handle to the source face object. 699 * 700 * left_glyph :: 701 * The index of the left glyph in the kern pair. 702 * 703 * right_glyph :: 704 * The index of the right glyph in the kern pair. 705 * 706 * @Output: 707 * kerning :: 708 * The kerning vector. This is in font units for 709 * scalable formats, and in pixels for fixed-sizes 710 * formats. 711 * 712 * @Return: 713 * FreeType error code. 0 means success. 714 * 715 * @Note: 716 * Only horizontal layouts (left-to-right & right-to-left) are 717 * supported by this function. Other layouts, or more sophisticated 718 * kernings are out of scope of this method (the basic driver 719 * interface is meant to be simple). 720 * 721 * They can be implemented by format-specific interfaces. 722 */ 723 static FT_Error 724 Get_Kerning( FT_Face t1face, /* T1_Face */ 725 FT_UInt left_glyph, 726 FT_UInt right_glyph, 727 FT_Vector* kerning ) 728 { 729 T1_Face face = (T1_Face)t1face; 730 731 732 kerning->x = 0; 733 kerning->y = 0; 734 735 if ( face->afm_data ) 736 T1_Get_Kerning( (AFM_FontInfo)face->afm_data, 737 left_glyph, 738 right_glyph, 739 kerning ); 740 741 return FT_Err_Ok; 742 } 743 744 745 #endif /* T1_CONFIG_OPTION_NO_AFM */ 746 747 748 FT_CALLBACK_TABLE_DEF 749 const FT_Driver_ClassRec t1_driver_class = 750 { 751 { 752 FT_MODULE_FONT_DRIVER | 753 FT_MODULE_DRIVER_SCALABLE | 754 FT_MODULE_DRIVER_HAS_HINTER, 755 756 sizeof ( PS_DriverRec ), 757 758 "type1", 759 0x10000L, 760 0x20000L, 761 762 NULL, /* module-specific interface */ 763 764 T1_Driver_Init, /* FT_Module_Constructor module_init */ 765 T1_Driver_Done, /* FT_Module_Destructor module_done */ 766 Get_Interface, /* FT_Module_Requester get_interface */ 767 }, 768 769 sizeof ( T1_FaceRec ), 770 sizeof ( T1_SizeRec ), 771 sizeof ( T1_GlyphSlotRec ), 772 773 T1_Face_Init, /* FT_Face_InitFunc init_face */ 774 T1_Face_Done, /* FT_Face_DoneFunc done_face */ 775 T1_Size_Init, /* FT_Size_InitFunc init_size */ 776 T1_Size_Done, /* FT_Size_DoneFunc done_size */ 777 T1_GlyphSlot_Init, /* FT_Slot_InitFunc init_slot */ 778 T1_GlyphSlot_Done, /* FT_Slot_DoneFunc done_slot */ 779 780 T1_Load_Glyph, /* FT_Slot_LoadFunc load_glyph */ 781 782 #ifdef T1_CONFIG_OPTION_NO_AFM 783 NULL, /* FT_Face_GetKerningFunc get_kerning */ 784 NULL, /* FT_Face_AttachFunc attach_file */ 785 #else 786 Get_Kerning, /* FT_Face_GetKerningFunc get_kerning */ 787 T1_Read_Metrics, /* FT_Face_AttachFunc attach_file */ 788 #endif 789 T1_Get_Advances, /* FT_Face_GetAdvancesFunc get_advances */ 790 791 T1_Size_Request, /* FT_Size_RequestFunc request_size */ 792 NULL /* FT_Size_SelectFunc select_size */ 793 }; 794 795 796 /* END */ 797
