1 /**************************************************************************** 2 * 3 * t1driver.c 4 * 5 * Type 1 driver interface (body). 6 * 7 * Copyright (C) 1996-2019 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 t1driver 54 55 /* 56 * GLYPH DICT SERVICE 57 * 58 */ 59 60 static FT_Error t1_get_glyph_name(T1_Face face,FT_UInt glyph_index,FT_Pointer buffer,FT_UInt buffer_max)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 t1_get_name_index(T1_Face face,const FT_String * glyph_name)73 t1_get_name_index( T1_Face face, 74 const 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* t1_get_ps_name(T1_Face face)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 (FT_Set_MM_WeightVector_Func)T1_Set_MM_WeightVector, /* set_mm_weightvector */ 134 (FT_Get_MM_WeightVector_Func)T1_Get_MM_WeightVector, /* get_mm_weightvector */ 135 136 (FT_Get_Var_Blend_Func) NULL, /* get_var_blend */ 137 (FT_Done_Blend_Func) T1_Done_Blend /* done_blend */ 138 }; 139 #endif 140 141 142 /* 143 * POSTSCRIPT INFO SERVICE 144 * 145 */ 146 147 static FT_Error t1_ps_get_font_info(FT_Face face,PS_FontInfoRec * afont_info)148 t1_ps_get_font_info( FT_Face face, 149 PS_FontInfoRec* afont_info ) 150 { 151 *afont_info = ((T1_Face)face)->type1.font_info; 152 153 return FT_Err_Ok; 154 } 155 156 157 static FT_Error t1_ps_get_font_extra(FT_Face face,PS_FontExtraRec * afont_extra)158 t1_ps_get_font_extra( FT_Face face, 159 PS_FontExtraRec* afont_extra ) 160 { 161 *afont_extra = ((T1_Face)face)->type1.font_extra; 162 163 return FT_Err_Ok; 164 } 165 166 167 static FT_Int t1_ps_has_glyph_names(FT_Face face)168 t1_ps_has_glyph_names( FT_Face face ) 169 { 170 FT_UNUSED( face ); 171 172 return 1; 173 } 174 175 176 static FT_Error t1_ps_get_font_private(FT_Face face,PS_PrivateRec * afont_private)177 t1_ps_get_font_private( FT_Face face, 178 PS_PrivateRec* afont_private ) 179 { 180 *afont_private = ((T1_Face)face)->type1.private_dict; 181 182 return FT_Err_Ok; 183 } 184 185 186 static FT_Long t1_ps_get_font_value(FT_Face face,PS_Dict_Keys key,FT_UInt idx,void * value,FT_Long value_len_)187 t1_ps_get_font_value( FT_Face face, 188 PS_Dict_Keys key, 189 FT_UInt idx, 190 void *value, 191 FT_Long value_len_ ) 192 { 193 FT_ULong retval = 0; /* always >= 1 if valid */ 194 FT_ULong value_len = value_len_ < 0 ? 0 : (FT_ULong)value_len_; 195 196 T1_Face t1face = (T1_Face)face; 197 T1_Font type1 = &t1face->type1; 198 199 200 switch ( key ) 201 { 202 case PS_DICT_FONT_TYPE: 203 retval = sizeof ( type1->font_type ); 204 if ( value && value_len >= retval ) 205 *((FT_Byte *)value) = type1->font_type; 206 break; 207 208 case PS_DICT_FONT_MATRIX: 209 if ( idx < sizeof ( type1->font_matrix ) / 210 sizeof ( type1->font_matrix.xx ) ) 211 { 212 FT_Fixed val = 0; 213 214 215 retval = sizeof ( val ); 216 if ( value && value_len >= retval ) 217 { 218 switch ( idx ) 219 { 220 case 0: 221 val = type1->font_matrix.xx; 222 break; 223 case 1: 224 val = type1->font_matrix.xy; 225 break; 226 case 2: 227 val = type1->font_matrix.yx; 228 break; 229 case 3: 230 val = type1->font_matrix.yy; 231 break; 232 } 233 *((FT_Fixed *)value) = val; 234 } 235 } 236 break; 237 238 case PS_DICT_FONT_BBOX: 239 if ( idx < sizeof ( type1->font_bbox ) / 240 sizeof ( type1->font_bbox.xMin ) ) 241 { 242 FT_Fixed val = 0; 243 244 245 retval = sizeof ( val ); 246 if ( value && value_len >= retval ) 247 { 248 switch ( idx ) 249 { 250 case 0: 251 val = type1->font_bbox.xMin; 252 break; 253 case 1: 254 val = type1->font_bbox.yMin; 255 break; 256 case 2: 257 val = type1->font_bbox.xMax; 258 break; 259 case 3: 260 val = type1->font_bbox.yMax; 261 break; 262 } 263 *((FT_Fixed *)value) = val; 264 } 265 } 266 break; 267 268 case PS_DICT_PAINT_TYPE: 269 retval = sizeof ( type1->paint_type ); 270 if ( value && value_len >= retval ) 271 *((FT_Byte *)value) = type1->paint_type; 272 break; 273 274 case PS_DICT_FONT_NAME: 275 if ( type1->font_name ) 276 { 277 retval = ft_strlen( type1->font_name ) + 1; 278 if ( value && value_len >= retval ) 279 ft_memcpy( value, (void *)( type1->font_name ), retval ); 280 } 281 break; 282 283 case PS_DICT_UNIQUE_ID: 284 retval = sizeof ( type1->private_dict.unique_id ); 285 if ( value && value_len >= retval ) 286 *((FT_Int *)value) = type1->private_dict.unique_id; 287 break; 288 289 case PS_DICT_NUM_CHAR_STRINGS: 290 retval = sizeof ( type1->num_glyphs ); 291 if ( value && value_len >= retval ) 292 *((FT_Int *)value) = type1->num_glyphs; 293 break; 294 295 case PS_DICT_CHAR_STRING_KEY: 296 if ( idx < (FT_UInt)type1->num_glyphs ) 297 { 298 retval = ft_strlen( type1->glyph_names[idx] ) + 1; 299 if ( value && value_len >= retval ) 300 { 301 ft_memcpy( value, (void *)( type1->glyph_names[idx] ), retval ); 302 ((FT_Char *)value)[retval - 1] = (FT_Char)'\0'; 303 } 304 } 305 break; 306 307 case PS_DICT_CHAR_STRING: 308 if ( idx < (FT_UInt)type1->num_glyphs ) 309 { 310 retval = type1->charstrings_len[idx] + 1; 311 if ( value && value_len >= retval ) 312 { 313 ft_memcpy( value, (void *)( type1->charstrings[idx] ), 314 retval - 1 ); 315 ((FT_Char *)value)[retval - 1] = (FT_Char)'\0'; 316 } 317 } 318 break; 319 320 case PS_DICT_ENCODING_TYPE: 321 retval = sizeof ( type1->encoding_type ); 322 if ( value && value_len >= retval ) 323 *((T1_EncodingType *)value) = type1->encoding_type; 324 break; 325 326 case PS_DICT_ENCODING_ENTRY: 327 if ( type1->encoding_type == T1_ENCODING_TYPE_ARRAY && 328 idx < (FT_UInt)type1->encoding.num_chars ) 329 { 330 retval = ft_strlen( type1->encoding.char_name[idx] ) + 1; 331 if ( value && value_len >= retval ) 332 { 333 ft_memcpy( value, (void *)( type1->encoding.char_name[idx] ), 334 retval - 1 ); 335 ((FT_Char *)value)[retval - 1] = (FT_Char)'\0'; 336 } 337 } 338 break; 339 340 case PS_DICT_NUM_SUBRS: 341 retval = sizeof ( type1->num_subrs ); 342 if ( value && value_len >= retval ) 343 *((FT_Int *)value) = type1->num_subrs; 344 break; 345 346 case PS_DICT_SUBR: 347 { 348 FT_Bool ok = 0; 349 350 351 if ( type1->subrs_hash ) 352 { 353 /* convert subr index to array index */ 354 size_t* val = ft_hash_num_lookup( (FT_Int)idx, 355 type1->subrs_hash ); 356 357 358 if ( val ) 359 { 360 idx = *val; 361 ok = 1; 362 } 363 } 364 else 365 { 366 if ( idx < (FT_UInt)type1->num_subrs ) 367 ok = 1; 368 } 369 370 if ( ok && type1->subrs ) 371 { 372 retval = type1->subrs_len[idx] + 1; 373 if ( value && value_len >= retval ) 374 { 375 ft_memcpy( value, (void *)( type1->subrs[idx] ), retval - 1 ); 376 ((FT_Char *)value)[retval - 1] = (FT_Char)'\0'; 377 } 378 } 379 } 380 break; 381 382 case PS_DICT_STD_HW: 383 retval = sizeof ( type1->private_dict.standard_width[0] ); 384 if ( value && value_len >= retval ) 385 *((FT_UShort *)value) = type1->private_dict.standard_width[0]; 386 break; 387 388 case PS_DICT_STD_VW: 389 retval = sizeof ( type1->private_dict.standard_height[0] ); 390 if ( value && value_len >= retval ) 391 *((FT_UShort *)value) = type1->private_dict.standard_height[0]; 392 break; 393 394 case PS_DICT_NUM_BLUE_VALUES: 395 retval = sizeof ( type1->private_dict.num_blue_values ); 396 if ( value && value_len >= retval ) 397 *((FT_Byte *)value) = type1->private_dict.num_blue_values; 398 break; 399 400 case PS_DICT_BLUE_VALUE: 401 if ( idx < type1->private_dict.num_blue_values ) 402 { 403 retval = sizeof ( type1->private_dict.blue_values[idx] ); 404 if ( value && value_len >= retval ) 405 *((FT_Short *)value) = type1->private_dict.blue_values[idx]; 406 } 407 break; 408 409 case PS_DICT_BLUE_SCALE: 410 retval = sizeof ( type1->private_dict.blue_scale ); 411 if ( value && value_len >= retval ) 412 *((FT_Fixed *)value) = type1->private_dict.blue_scale; 413 break; 414 415 case PS_DICT_BLUE_FUZZ: 416 retval = sizeof ( type1->private_dict.blue_fuzz ); 417 if ( value && value_len >= retval ) 418 *((FT_Int *)value) = type1->private_dict.blue_fuzz; 419 break; 420 421 case PS_DICT_BLUE_SHIFT: 422 retval = sizeof ( type1->private_dict.blue_shift ); 423 if ( value && value_len >= retval ) 424 *((FT_Int *)value) = type1->private_dict.blue_shift; 425 break; 426 427 case PS_DICT_NUM_OTHER_BLUES: 428 retval = sizeof ( type1->private_dict.num_other_blues ); 429 if ( value && value_len >= retval ) 430 *((FT_Byte *)value) = type1->private_dict.num_other_blues; 431 break; 432 433 case PS_DICT_OTHER_BLUE: 434 if ( idx < type1->private_dict.num_other_blues ) 435 { 436 retval = sizeof ( type1->private_dict.other_blues[idx] ); 437 if ( value && value_len >= retval ) 438 *((FT_Short *)value) = type1->private_dict.other_blues[idx]; 439 } 440 break; 441 442 case PS_DICT_NUM_FAMILY_BLUES: 443 retval = sizeof ( type1->private_dict.num_family_blues ); 444 if ( value && value_len >= retval ) 445 *((FT_Byte *)value) = type1->private_dict.num_family_blues; 446 break; 447 448 case PS_DICT_FAMILY_BLUE: 449 if ( idx < type1->private_dict.num_family_blues ) 450 { 451 retval = sizeof ( type1->private_dict.family_blues[idx] ); 452 if ( value && value_len >= retval ) 453 *((FT_Short *)value) = type1->private_dict.family_blues[idx]; 454 } 455 break; 456 457 case PS_DICT_NUM_FAMILY_OTHER_BLUES: 458 retval = sizeof ( type1->private_dict.num_family_other_blues ); 459 if ( value && value_len >= retval ) 460 *((FT_Byte *)value) = type1->private_dict.num_family_other_blues; 461 break; 462 463 case PS_DICT_FAMILY_OTHER_BLUE: 464 if ( idx < type1->private_dict.num_family_other_blues ) 465 { 466 retval = sizeof ( type1->private_dict.family_other_blues[idx] ); 467 if ( value && value_len >= retval ) 468 *((FT_Short *)value) = type1->private_dict.family_other_blues[idx]; 469 } 470 break; 471 472 case PS_DICT_NUM_STEM_SNAP_H: 473 retval = sizeof ( type1->private_dict.num_snap_widths ); 474 if ( value && value_len >= retval ) 475 *((FT_Byte *)value) = type1->private_dict.num_snap_widths; 476 break; 477 478 case PS_DICT_STEM_SNAP_H: 479 if ( idx < type1->private_dict.num_snap_widths ) 480 { 481 retval = sizeof ( type1->private_dict.snap_widths[idx] ); 482 if ( value && value_len >= retval ) 483 *((FT_Short *)value) = type1->private_dict.snap_widths[idx]; 484 } 485 break; 486 487 case PS_DICT_NUM_STEM_SNAP_V: 488 retval = sizeof ( type1->private_dict.num_snap_heights ); 489 if ( value && value_len >= retval ) 490 *((FT_Byte *)value) = type1->private_dict.num_snap_heights; 491 break; 492 493 case PS_DICT_STEM_SNAP_V: 494 if ( idx < type1->private_dict.num_snap_heights ) 495 { 496 retval = sizeof ( type1->private_dict.snap_heights[idx] ); 497 if ( value && value_len >= retval ) 498 *((FT_Short *)value) = type1->private_dict.snap_heights[idx]; 499 } 500 break; 501 502 case PS_DICT_RND_STEM_UP: 503 retval = sizeof ( type1->private_dict.round_stem_up ); 504 if ( value && value_len >= retval ) 505 *((FT_Bool *)value) = type1->private_dict.round_stem_up; 506 break; 507 508 case PS_DICT_FORCE_BOLD: 509 retval = sizeof ( type1->private_dict.force_bold ); 510 if ( value && value_len >= retval ) 511 *((FT_Bool *)value) = type1->private_dict.force_bold; 512 break; 513 514 case PS_DICT_MIN_FEATURE: 515 if ( idx < sizeof ( type1->private_dict.min_feature ) / 516 sizeof ( type1->private_dict.min_feature[0] ) ) 517 { 518 retval = sizeof ( type1->private_dict.min_feature[idx] ); 519 if ( value && value_len >= retval ) 520 *((FT_Short *)value) = type1->private_dict.min_feature[idx]; 521 } 522 break; 523 524 case PS_DICT_LEN_IV: 525 retval = sizeof ( type1->private_dict.lenIV ); 526 if ( value && value_len >= retval ) 527 *((FT_Int *)value) = type1->private_dict.lenIV; 528 break; 529 530 case PS_DICT_PASSWORD: 531 retval = sizeof ( type1->private_dict.password ); 532 if ( value && value_len >= retval ) 533 *((FT_Long *)value) = type1->private_dict.password; 534 break; 535 536 case PS_DICT_LANGUAGE_GROUP: 537 retval = sizeof ( type1->private_dict.language_group ); 538 if ( value && value_len >= retval ) 539 *((FT_Long *)value) = type1->private_dict.language_group; 540 break; 541 542 case PS_DICT_IS_FIXED_PITCH: 543 retval = sizeof ( type1->font_info.is_fixed_pitch ); 544 if ( value && value_len >= retval ) 545 *((FT_Bool *)value) = type1->font_info.is_fixed_pitch; 546 break; 547 548 case PS_DICT_UNDERLINE_POSITION: 549 retval = sizeof ( type1->font_info.underline_position ); 550 if ( value && value_len >= retval ) 551 *((FT_Short *)value) = type1->font_info.underline_position; 552 break; 553 554 case PS_DICT_UNDERLINE_THICKNESS: 555 retval = sizeof ( type1->font_info.underline_thickness ); 556 if ( value && value_len >= retval ) 557 *((FT_UShort *)value) = type1->font_info.underline_thickness; 558 break; 559 560 case PS_DICT_FS_TYPE: 561 retval = sizeof ( type1->font_extra.fs_type ); 562 if ( value && value_len >= retval ) 563 *((FT_UShort *)value) = type1->font_extra.fs_type; 564 break; 565 566 case PS_DICT_VERSION: 567 if ( type1->font_info.version ) 568 { 569 retval = ft_strlen( type1->font_info.version ) + 1; 570 if ( value && value_len >= retval ) 571 ft_memcpy( value, (void *)( type1->font_info.version ), retval ); 572 } 573 break; 574 575 case PS_DICT_NOTICE: 576 if ( type1->font_info.notice ) 577 { 578 retval = ft_strlen( type1->font_info.notice ) + 1; 579 if ( value && value_len >= retval ) 580 ft_memcpy( value, (void *)( type1->font_info.notice ), retval ); 581 } 582 break; 583 584 case PS_DICT_FULL_NAME: 585 if ( type1->font_info.full_name ) 586 { 587 retval = ft_strlen( type1->font_info.full_name ) + 1; 588 if ( value && value_len >= retval ) 589 ft_memcpy( value, (void *)( type1->font_info.full_name ), retval ); 590 } 591 break; 592 593 case PS_DICT_FAMILY_NAME: 594 if ( type1->font_info.family_name ) 595 { 596 retval = ft_strlen( type1->font_info.family_name ) + 1; 597 if ( value && value_len >= retval ) 598 ft_memcpy( value, (void *)( type1->font_info.family_name ), 599 retval ); 600 } 601 break; 602 603 case PS_DICT_WEIGHT: 604 if ( type1->font_info.weight ) 605 { 606 retval = ft_strlen( type1->font_info.weight ) + 1; 607 if ( value && value_len >= retval ) 608 ft_memcpy( value, (void *)( type1->font_info.weight ), retval ); 609 } 610 break; 611 612 case PS_DICT_ITALIC_ANGLE: 613 retval = sizeof ( type1->font_info.italic_angle ); 614 if ( value && value_len >= retval ) 615 *((FT_Long *)value) = type1->font_info.italic_angle; 616 break; 617 } 618 619 return retval == 0 ? -1 : (FT_Long)retval; 620 } 621 622 623 static const FT_Service_PsInfoRec t1_service_ps_info = 624 { 625 (PS_GetFontInfoFunc) t1_ps_get_font_info, /* ps_get_font_info */ 626 (PS_GetFontExtraFunc) t1_ps_get_font_extra, /* ps_get_font_extra */ 627 (PS_HasGlyphNamesFunc) t1_ps_has_glyph_names, /* ps_has_glyph_names */ 628 (PS_GetFontPrivateFunc)t1_ps_get_font_private, /* ps_get_font_private */ 629 (PS_GetFontValueFunc) t1_ps_get_font_value, /* ps_get_font_value */ 630 }; 631 632 633 #ifndef T1_CONFIG_OPTION_NO_AFM 634 static const FT_Service_KerningRec t1_service_kerning = 635 { 636 T1_Get_Track_Kerning, /* get_track */ 637 }; 638 #endif 639 640 641 /* 642 * PROPERTY SERVICE 643 * 644 */ 645 646 FT_DEFINE_SERVICE_PROPERTIESREC( 647 t1_service_properties, 648 649 (FT_Properties_SetFunc)ps_property_set, /* set_property */ 650 (FT_Properties_GetFunc)ps_property_get ) /* get_property */ 651 652 653 /* 654 * SERVICE LIST 655 * 656 */ 657 658 static const FT_ServiceDescRec t1_services[] = 659 { 660 { FT_SERVICE_ID_POSTSCRIPT_FONT_NAME, &t1_service_ps_name }, 661 { FT_SERVICE_ID_GLYPH_DICT, &t1_service_glyph_dict }, 662 { FT_SERVICE_ID_FONT_FORMAT, FT_FONT_FORMAT_TYPE_1 }, 663 { FT_SERVICE_ID_POSTSCRIPT_INFO, &t1_service_ps_info }, 664 { FT_SERVICE_ID_PROPERTIES, &t1_service_properties }, 665 666 #ifndef T1_CONFIG_OPTION_NO_AFM 667 { FT_SERVICE_ID_KERNING, &t1_service_kerning }, 668 #endif 669 670 #ifndef T1_CONFIG_OPTION_NO_MM_SUPPORT 671 { FT_SERVICE_ID_MULTI_MASTERS, &t1_service_multi_masters }, 672 #endif 673 { NULL, NULL } 674 }; 675 676 677 FT_CALLBACK_DEF( FT_Module_Interface ) Get_Interface(FT_Module module,const FT_String * t1_interface)678 Get_Interface( FT_Module module, 679 const FT_String* t1_interface ) 680 { 681 FT_UNUSED( module ); 682 683 return ft_service_list_lookup( t1_services, t1_interface ); 684 } 685 686 687 #ifndef T1_CONFIG_OPTION_NO_AFM 688 689 /************************************************************************** 690 * 691 * @Function: 692 * Get_Kerning 693 * 694 * @Description: 695 * A driver method used to return the kerning vector between two 696 * glyphs of the same face. 697 * 698 * @Input: 699 * face :: 700 * A handle to the source face object. 701 * 702 * left_glyph :: 703 * The index of the left glyph in the kern pair. 704 * 705 * right_glyph :: 706 * The index of the right glyph in the kern pair. 707 * 708 * @Output: 709 * kerning :: 710 * The kerning vector. This is in font units for 711 * scalable formats, and in pixels for fixed-sizes 712 * formats. 713 * 714 * @Return: 715 * FreeType error code. 0 means success. 716 * 717 * @Note: 718 * Only horizontal layouts (left-to-right & right-to-left) are 719 * supported by this function. Other layouts, or more sophisticated 720 * kernings are out of scope of this method (the basic driver 721 * interface is meant to be simple). 722 * 723 * They can be implemented by format-specific interfaces. 724 */ 725 static FT_Error Get_Kerning(FT_Face t1face,FT_UInt left_glyph,FT_UInt right_glyph,FT_Vector * kerning)726 Get_Kerning( FT_Face t1face, /* T1_Face */ 727 FT_UInt left_glyph, 728 FT_UInt right_glyph, 729 FT_Vector* kerning ) 730 { 731 T1_Face face = (T1_Face)t1face; 732 733 734 kerning->x = 0; 735 kerning->y = 0; 736 737 if ( face->afm_data ) 738 T1_Get_Kerning( (AFM_FontInfo)face->afm_data, 739 left_glyph, 740 right_glyph, 741 kerning ); 742 743 return FT_Err_Ok; 744 } 745 746 747 #endif /* T1_CONFIG_OPTION_NO_AFM */ 748 749 750 FT_CALLBACK_TABLE_DEF 751 const FT_Driver_ClassRec t1_driver_class = 752 { 753 { 754 FT_MODULE_FONT_DRIVER | 755 FT_MODULE_DRIVER_SCALABLE | 756 FT_MODULE_DRIVER_HAS_HINTER, 757 758 sizeof ( PS_DriverRec ), 759 760 "type1", 761 0x10000L, 762 0x20000L, 763 764 NULL, /* module-specific interface */ 765 766 T1_Driver_Init, /* FT_Module_Constructor module_init */ 767 T1_Driver_Done, /* FT_Module_Destructor module_done */ 768 Get_Interface, /* FT_Module_Requester get_interface */ 769 }, 770 771 sizeof ( T1_FaceRec ), 772 sizeof ( T1_SizeRec ), 773 sizeof ( T1_GlyphSlotRec ), 774 775 T1_Face_Init, /* FT_Face_InitFunc init_face */ 776 T1_Face_Done, /* FT_Face_DoneFunc done_face */ 777 T1_Size_Init, /* FT_Size_InitFunc init_size */ 778 T1_Size_Done, /* FT_Size_DoneFunc done_size */ 779 T1_GlyphSlot_Init, /* FT_Slot_InitFunc init_slot */ 780 T1_GlyphSlot_Done, /* FT_Slot_DoneFunc done_slot */ 781 782 T1_Load_Glyph, /* FT_Slot_LoadFunc load_glyph */ 783 784 #ifdef T1_CONFIG_OPTION_NO_AFM 785 NULL, /* FT_Face_GetKerningFunc get_kerning */ 786 NULL, /* FT_Face_AttachFunc attach_file */ 787 #else 788 Get_Kerning, /* FT_Face_GetKerningFunc get_kerning */ 789 T1_Read_Metrics, /* FT_Face_AttachFunc attach_file */ 790 #endif 791 T1_Get_Advances, /* FT_Face_GetAdvancesFunc get_advances */ 792 793 T1_Size_Request, /* FT_Size_RequestFunc request_size */ 794 NULL /* FT_Size_SelectFunc select_size */ 795 }; 796 797 798 /* END */ 799