1 /**************************************************************************** 2 * 3 * cidobjs.c 4 * 5 * CID objects manager (body). 6 * 7 * Copyright (C) 1996-2021 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 <freetype/internal/ftdebug.h> 20 #include <freetype/internal/ftstream.h> 21 22 #include "cidgload.h" 23 #include "cidload.h" 24 25 #include <freetype/internal/services/svpscmap.h> 26 #include <freetype/internal/psaux.h> 27 #include <freetype/internal/pshints.h> 28 #include <freetype/ftdriver.h> 29 30 #include "ciderrs.h" 31 32 33 /************************************************************************** 34 * 35 * The macro FT_COMPONENT is used in trace mode. It is an implicit 36 * parameter of the FT_TRACE() and FT_ERROR() macros, used to print/log 37 * messages during execution. 38 */ 39 #undef FT_COMPONENT 40 #define FT_COMPONENT cidobjs 41 42 43 /************************************************************************** 44 * 45 * SLOT FUNCTIONS 46 * 47 */ 48 49 FT_LOCAL_DEF( void ) cid_slot_done(FT_GlyphSlot slot)50 cid_slot_done( FT_GlyphSlot slot ) 51 { 52 if ( slot->internal ) 53 slot->internal->glyph_hints = NULL; 54 } 55 56 57 FT_LOCAL_DEF( FT_Error ) cid_slot_init(FT_GlyphSlot slot)58 cid_slot_init( FT_GlyphSlot slot ) 59 { 60 CID_Face face; 61 PSHinter_Service pshinter; 62 63 64 face = (CID_Face)slot->face; 65 pshinter = (PSHinter_Service)face->pshinter; 66 67 if ( pshinter ) 68 { 69 FT_Module module; 70 71 72 module = FT_Get_Module( slot->face->driver->root.library, 73 "pshinter" ); 74 if ( module ) 75 { 76 T1_Hints_Funcs funcs; 77 78 79 funcs = pshinter->get_t1_funcs( module ); 80 slot->internal->glyph_hints = (void*)funcs; 81 } 82 } 83 84 return 0; 85 } 86 87 88 /************************************************************************** 89 * 90 * SIZE FUNCTIONS 91 * 92 */ 93 94 95 static PSH_Globals_Funcs cid_size_get_globals_funcs(CID_Size size)96 cid_size_get_globals_funcs( CID_Size size ) 97 { 98 CID_Face face = (CID_Face)size->root.face; 99 PSHinter_Service pshinter = (PSHinter_Service)face->pshinter; 100 FT_Module module; 101 102 103 module = FT_Get_Module( size->root.face->driver->root.library, 104 "pshinter" ); 105 return ( module && pshinter && pshinter->get_globals_funcs ) 106 ? pshinter->get_globals_funcs( module ) 107 : 0; 108 } 109 110 111 FT_LOCAL_DEF( void ) cid_size_done(FT_Size cidsize)112 cid_size_done( FT_Size cidsize ) /* CID_Size */ 113 { 114 CID_Size size = (CID_Size)cidsize; 115 116 117 if ( cidsize->internal->module_data ) 118 { 119 PSH_Globals_Funcs funcs; 120 121 122 funcs = cid_size_get_globals_funcs( size ); 123 if ( funcs ) 124 funcs->destroy( (PSH_Globals)cidsize->internal->module_data ); 125 126 cidsize->internal->module_data = NULL; 127 } 128 } 129 130 131 FT_LOCAL_DEF( FT_Error ) cid_size_init(FT_Size cidsize)132 cid_size_init( FT_Size cidsize ) /* CID_Size */ 133 { 134 CID_Size size = (CID_Size)cidsize; 135 FT_Error error = FT_Err_Ok; 136 PSH_Globals_Funcs funcs = cid_size_get_globals_funcs( size ); 137 138 139 if ( funcs ) 140 { 141 PSH_Globals globals; 142 CID_Face face = (CID_Face)cidsize->face; 143 CID_FaceDict dict = face->cid.font_dicts + face->root.face_index; 144 PS_Private priv = &dict->private_dict; 145 146 147 error = funcs->create( cidsize->face->memory, priv, &globals ); 148 if ( !error ) 149 cidsize->internal->module_data = globals; 150 } 151 152 return error; 153 } 154 155 156 FT_LOCAL( FT_Error ) cid_size_request(FT_Size size,FT_Size_Request req)157 cid_size_request( FT_Size size, 158 FT_Size_Request req ) 159 { 160 FT_Error error; 161 162 PSH_Globals_Funcs funcs; 163 164 165 error = FT_Request_Metrics( size->face, req ); 166 if ( error ) 167 goto Exit; 168 169 funcs = cid_size_get_globals_funcs( (CID_Size)size ); 170 171 if ( funcs ) 172 funcs->set_scale( (PSH_Globals)size->internal->module_data, 173 size->metrics.x_scale, 174 size->metrics.y_scale, 175 0, 0 ); 176 177 Exit: 178 return error; 179 } 180 181 182 /************************************************************************** 183 * 184 * FACE FUNCTIONS 185 * 186 */ 187 188 /************************************************************************** 189 * 190 * @Function: 191 * cid_face_done 192 * 193 * @Description: 194 * Finalizes a given face object. 195 * 196 * @Input: 197 * face :: 198 * A pointer to the face object to destroy. 199 */ 200 FT_LOCAL_DEF( void ) cid_face_done(FT_Face cidface)201 cid_face_done( FT_Face cidface ) /* CID_Face */ 202 { 203 CID_Face face = (CID_Face)cidface; 204 FT_Memory memory; 205 CID_FaceInfo cid; 206 PS_FontInfo info; 207 208 209 if ( !face ) 210 return; 211 212 cid = &face->cid; 213 info = &cid->font_info; 214 memory = cidface->memory; 215 216 /* release subrs */ 217 if ( face->subrs ) 218 { 219 FT_UInt n; 220 221 222 for ( n = 0; n < cid->num_dicts; n++ ) 223 { 224 CID_Subrs subr = face->subrs + n; 225 226 227 if ( subr->code ) 228 { 229 FT_FREE( subr->code[0] ); 230 FT_FREE( subr->code ); 231 } 232 } 233 234 FT_FREE( face->subrs ); 235 } 236 237 /* release FontInfo strings */ 238 FT_FREE( info->version ); 239 FT_FREE( info->notice ); 240 FT_FREE( info->full_name ); 241 FT_FREE( info->family_name ); 242 FT_FREE( info->weight ); 243 244 /* release font dictionaries */ 245 FT_FREE( cid->font_dicts ); 246 cid->num_dicts = 0; 247 248 /* release other strings */ 249 FT_FREE( cid->cid_font_name ); 250 FT_FREE( cid->registry ); 251 FT_FREE( cid->ordering ); 252 253 cidface->family_name = NULL; 254 cidface->style_name = NULL; 255 256 FT_FREE( face->binary_data ); 257 FT_FREE( face->cid_stream ); 258 } 259 260 261 /************************************************************************** 262 * 263 * @Function: 264 * cid_face_init 265 * 266 * @Description: 267 * Initializes a given CID face object. 268 * 269 * @Input: 270 * stream :: 271 * The source font stream. 272 * 273 * face_index :: 274 * The index of the font face in the resource. 275 * 276 * num_params :: 277 * Number of additional generic parameters. Ignored. 278 * 279 * params :: 280 * Additional generic parameters. Ignored. 281 * 282 * @InOut: 283 * face :: 284 * The newly built face object. 285 * 286 * @Return: 287 * FreeType error code. 0 means success. 288 */ 289 FT_LOCAL_DEF( FT_Error ) cid_face_init(FT_Stream stream,FT_Face cidface,FT_Int face_index,FT_Int num_params,FT_Parameter * params)290 cid_face_init( FT_Stream stream, 291 FT_Face cidface, /* CID_Face */ 292 FT_Int face_index, 293 FT_Int num_params, 294 FT_Parameter* params ) 295 { 296 CID_Face face = (CID_Face)cidface; 297 FT_Error error; 298 PSAux_Service psaux; 299 PSHinter_Service pshinter; 300 301 FT_UNUSED( num_params ); 302 FT_UNUSED( params ); 303 FT_UNUSED( stream ); 304 305 306 cidface->num_faces = 1; 307 308 psaux = (PSAux_Service)face->psaux; 309 if ( !psaux ) 310 { 311 psaux = (PSAux_Service)FT_Get_Module_Interface( 312 FT_FACE_LIBRARY( face ), "psaux" ); 313 314 if ( !psaux ) 315 { 316 FT_ERROR(( "cid_face_init: cannot access `psaux' module\n" )); 317 error = FT_THROW( Missing_Module ); 318 goto Exit; 319 } 320 321 face->psaux = psaux; 322 } 323 324 pshinter = (PSHinter_Service)face->pshinter; 325 if ( !pshinter ) 326 { 327 pshinter = (PSHinter_Service)FT_Get_Module_Interface( 328 FT_FACE_LIBRARY( face ), "pshinter" ); 329 330 face->pshinter = pshinter; 331 } 332 333 FT_TRACE2(( "CID driver\n" )); 334 335 /* open the tokenizer; this will also check the font format */ 336 if ( FT_STREAM_SEEK( 0 ) ) 337 goto Exit; 338 339 error = cid_face_open( face, face_index ); 340 if ( error ) 341 goto Exit; 342 343 /* if we just wanted to check the format, leave successfully now */ 344 if ( face_index < 0 ) 345 goto Exit; 346 347 /* check the face index */ 348 /* XXX: handle CID fonts with more than a single face */ 349 if ( ( face_index & 0xFFFF ) != 0 ) 350 { 351 FT_ERROR(( "cid_face_init: invalid face index\n" )); 352 error = FT_THROW( Invalid_Argument ); 353 goto Exit; 354 } 355 356 /* now load the font program into the face object */ 357 358 /* initialize the face object fields */ 359 360 /* set up root face fields */ 361 { 362 CID_FaceInfo cid = &face->cid; 363 PS_FontInfo info = &cid->font_info; 364 365 366 cidface->num_glyphs = (FT_Long)cid->cid_count; 367 cidface->num_charmaps = 0; 368 369 cidface->face_index = face_index & 0xFFFF; 370 371 cidface->face_flags |= FT_FACE_FLAG_SCALABLE | /* scalable outlines */ 372 FT_FACE_FLAG_HORIZONTAL | /* horizontal data */ 373 FT_FACE_FLAG_HINTER; /* has native hinter */ 374 375 if ( info->is_fixed_pitch ) 376 cidface->face_flags |= FT_FACE_FLAG_FIXED_WIDTH; 377 378 /* XXX: TODO: add kerning with .afm support */ 379 380 /* get style name -- be careful, some broken fonts only */ 381 /* have a /FontName dictionary entry! */ 382 cidface->family_name = info->family_name; 383 /* assume "Regular" style if we don't know better */ 384 cidface->style_name = (char *)"Regular"; 385 if ( cidface->family_name ) 386 { 387 char* full = info->full_name; 388 char* family = cidface->family_name; 389 390 391 if ( full ) 392 { 393 while ( *full ) 394 { 395 if ( *full == *family ) 396 { 397 family++; 398 full++; 399 } 400 else 401 { 402 if ( *full == ' ' || *full == '-' ) 403 full++; 404 else if ( *family == ' ' || *family == '-' ) 405 family++; 406 else 407 { 408 if ( !*family ) 409 cidface->style_name = full; 410 break; 411 } 412 } 413 } 414 } 415 } 416 else 417 { 418 /* do we have a `/FontName'? */ 419 if ( cid->cid_font_name ) 420 cidface->family_name = cid->cid_font_name; 421 } 422 423 /* compute style flags */ 424 cidface->style_flags = 0; 425 if ( info->italic_angle ) 426 cidface->style_flags |= FT_STYLE_FLAG_ITALIC; 427 if ( info->weight ) 428 { 429 if ( !ft_strcmp( info->weight, "Bold" ) || 430 !ft_strcmp( info->weight, "Black" ) ) 431 cidface->style_flags |= FT_STYLE_FLAG_BOLD; 432 } 433 434 /* no embedded bitmap support */ 435 cidface->num_fixed_sizes = 0; 436 cidface->available_sizes = NULL; 437 438 cidface->bbox.xMin = cid->font_bbox.xMin >> 16; 439 cidface->bbox.yMin = cid->font_bbox.yMin >> 16; 440 /* no `U' suffix here to 0xFFFF! */ 441 cidface->bbox.xMax = ( cid->font_bbox.xMax + 0xFFFF ) >> 16; 442 cidface->bbox.yMax = ( cid->font_bbox.yMax + 0xFFFF ) >> 16; 443 444 if ( !cidface->units_per_EM ) 445 cidface->units_per_EM = 1000; 446 447 cidface->ascender = (FT_Short)( cidface->bbox.yMax ); 448 cidface->descender = (FT_Short)( cidface->bbox.yMin ); 449 450 cidface->height = (FT_Short)( ( cidface->units_per_EM * 12 ) / 10 ); 451 if ( cidface->height < cidface->ascender - cidface->descender ) 452 cidface->height = (FT_Short)( cidface->ascender - cidface->descender ); 453 454 cidface->underline_position = (FT_Short)info->underline_position; 455 cidface->underline_thickness = (FT_Short)info->underline_thickness; 456 } 457 458 Exit: 459 return error; 460 } 461 462 463 /************************************************************************** 464 * 465 * @Function: 466 * cid_driver_init 467 * 468 * @Description: 469 * Initializes a given CID driver object. 470 * 471 * @Input: 472 * driver :: 473 * A handle to the target driver object. 474 * 475 * @Return: 476 * FreeType error code. 0 means success. 477 */ 478 FT_LOCAL_DEF( FT_Error ) cid_driver_init(FT_Module module)479 cid_driver_init( FT_Module module ) 480 { 481 PS_Driver driver = (PS_Driver)module; 482 483 FT_UInt32 seed; 484 485 486 /* set default property values, cf. `ftt1drv.h' */ 487 driver->hinting_engine = FT_HINTING_ADOBE; 488 489 driver->no_stem_darkening = TRUE; 490 491 driver->darken_params[0] = CFF_CONFIG_OPTION_DARKENING_PARAMETER_X1; 492 driver->darken_params[1] = CFF_CONFIG_OPTION_DARKENING_PARAMETER_Y1; 493 driver->darken_params[2] = CFF_CONFIG_OPTION_DARKENING_PARAMETER_X2; 494 driver->darken_params[3] = CFF_CONFIG_OPTION_DARKENING_PARAMETER_Y2; 495 driver->darken_params[4] = CFF_CONFIG_OPTION_DARKENING_PARAMETER_X3; 496 driver->darken_params[5] = CFF_CONFIG_OPTION_DARKENING_PARAMETER_Y3; 497 driver->darken_params[6] = CFF_CONFIG_OPTION_DARKENING_PARAMETER_X4; 498 driver->darken_params[7] = CFF_CONFIG_OPTION_DARKENING_PARAMETER_Y4; 499 500 /* compute random seed from some memory addresses */ 501 seed = (FT_UInt32)( (FT_Offset)(char*)&seed ^ 502 (FT_Offset)(char*)&module ^ 503 (FT_Offset)(char*)module->memory ); 504 seed = seed ^ ( seed >> 10 ) ^ ( seed >> 20 ); 505 506 driver->random_seed = (FT_Int32)seed; 507 if ( driver->random_seed < 0 ) 508 driver->random_seed = -driver->random_seed; 509 else if ( driver->random_seed == 0 ) 510 driver->random_seed = 123456789; 511 512 return FT_Err_Ok; 513 } 514 515 516 /************************************************************************** 517 * 518 * @Function: 519 * cid_driver_done 520 * 521 * @Description: 522 * Finalizes a given CID driver. 523 * 524 * @Input: 525 * driver :: 526 * A handle to the target CID driver. 527 */ 528 FT_LOCAL_DEF( void ) cid_driver_done(FT_Module driver)529 cid_driver_done( FT_Module driver ) 530 { 531 FT_UNUSED( driver ); 532 } 533 534 535 /* END */ 536