cffdrivr.c revision f463818dd9146e11105c0572fb119e757eb47768
1beca12a56c0772fc8263ad7ca12ca022b8671c1csbaig/***************************************************************************/ 2beca12a56c0772fc8263ad7ca12ca022b8671c1csbaig/* */ 3beca12a56c0772fc8263ad7ca12ca022b8671c1csbaig/* cffdrivr.c */ 4beca12a56c0772fc8263ad7ca12ca022b8671c1csbaig/* */ 5beca12a56c0772fc8263ad7ca12ca022b8671c1csbaig/* OpenType font driver implementation (body). */ 6beca12a56c0772fc8263ad7ca12ca022b8671c1csbaig/* */ 7beca12a56c0772fc8263ad7ca12ca022b8671c1csbaig/* Copyright 1996-2001, 2002, 2003, 2004, 2005, 2006, 2007 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_TRUETYPE_IDS_H 25#include FT_SERVICE_POSTSCRIPT_CMAPS_H 26#include FT_SERVICE_POSTSCRIPT_INFO_H 27#include FT_SERVICE_TT_CMAP_H 28 29#include "cffdrivr.h" 30#include "cffgload.h" 31#include "cffload.h" 32#include "cffcmap.h" 33 34#include "cfferrs.h" 35 36#include FT_SERVICE_XFREE86_NAME_H 37#include FT_SERVICE_GLYPH_DICT_H 38 39 /*************************************************************************/ 40 /* */ 41 /* The macro FT_COMPONENT is used in trace mode. It is an implicit */ 42 /* parameter of the FT_TRACE() and FT_ERROR() macros, used to print/log */ 43 /* messages during execution. */ 44 /* */ 45#undef FT_COMPONENT 46#define FT_COMPONENT trace_cffdriver 47 48 49 /*************************************************************************/ 50 /*************************************************************************/ 51 /*************************************************************************/ 52 /**** ****/ 53 /**** ****/ 54 /**** F A C E S ****/ 55 /**** ****/ 56 /**** ****/ 57 /*************************************************************************/ 58 /*************************************************************************/ 59 /*************************************************************************/ 60 61 62#undef PAIR_TAG 63#define PAIR_TAG( left, right ) ( ( (FT_ULong)left << 16 ) | \ 64 (FT_ULong)right ) 65 66 67 /*************************************************************************/ 68 /* */ 69 /* <Function> */ 70 /* cff_get_kerning */ 71 /* */ 72 /* <Description> */ 73 /* A driver method used to return the kerning vector between two */ 74 /* glyphs of the same face. */ 75 /* */ 76 /* <Input> */ 77 /* face :: A handle to the source face object. */ 78 /* */ 79 /* left_glyph :: The index of the left glyph in the kern pair. */ 80 /* */ 81 /* right_glyph :: The index of the right glyph in the kern pair. */ 82 /* */ 83 /* <Output> */ 84 /* kerning :: The kerning vector. This is in font units for */ 85 /* scalable formats, and in pixels for fixed-sizes */ 86 /* formats. */ 87 /* */ 88 /* <Return> */ 89 /* FreeType error code. 0 means success. */ 90 /* */ 91 /* <Note> */ 92 /* Only horizontal layouts (left-to-right & right-to-left) are */ 93 /* supported by this function. Other layouts, or more sophisticated */ 94 /* kernings, are out of scope of this method (the basic driver */ 95 /* interface is meant to be simple). */ 96 /* */ 97 /* They can be implemented by format-specific interfaces. */ 98 /* */ 99 FT_CALLBACK_DEF( FT_Error ) 100 cff_get_kerning( FT_Face ttface, /* TT_Face */ 101 FT_UInt left_glyph, 102 FT_UInt right_glyph, 103 FT_Vector* kerning ) 104 { 105 TT_Face face = (TT_Face)ttface; 106 SFNT_Service sfnt = (SFNT_Service)face->sfnt; 107 108 109 kerning->x = 0; 110 kerning->y = 0; 111 112 if ( sfnt ) 113 kerning->x = sfnt->get_kerning( face, left_glyph, right_glyph ); 114 115 return CFF_Err_Ok; 116 } 117 118 119#undef PAIR_TAG 120 121 122 /*************************************************************************/ 123 /* */ 124 /* <Function> */ 125 /* Load_Glyph */ 126 /* */ 127 /* <Description> */ 128 /* A driver method used to load a glyph within a given glyph slot. */ 129 /* */ 130 /* <Input> */ 131 /* slot :: A handle to the target slot object where the glyph */ 132 /* will be loaded. */ 133 /* */ 134 /* size :: A handle to the source face size at which the glyph */ 135 /* must be scaled, loaded, etc. */ 136 /* */ 137 /* glyph_index :: The index of the glyph in the font file. */ 138 /* */ 139 /* load_flags :: A flag indicating what to load for this glyph. The */ 140 /* FT_LOAD_??? constants can be used to control the */ 141 /* glyph loading process (e.g., whether the outline */ 142 /* should be scaled, whether to load bitmaps or not, */ 143 /* whether to hint the outline, etc). */ 144 /* */ 145 /* <Return> */ 146 /* FreeType error code. 0 means success. */ 147 /* */ 148 FT_CALLBACK_DEF( FT_Error ) 149 Load_Glyph( FT_GlyphSlot cffslot, /* CFF_GlyphSlot */ 150 FT_Size cffsize, /* CFF_Size */ 151 FT_UInt glyph_index, 152 FT_Int32 load_flags ) 153 { 154 FT_Error error; 155 CFF_GlyphSlot slot = (CFF_GlyphSlot)cffslot; 156 CFF_Size size = (CFF_Size)cffsize; 157 158 159 if ( !slot ) 160 return CFF_Err_Invalid_Slot_Handle; 161 162 /* check whether we want a scaled outline or bitmap */ 163 if ( !size ) 164 load_flags |= FT_LOAD_NO_SCALE | FT_LOAD_NO_HINTING; 165 166 if ( load_flags & FT_LOAD_NO_SCALE ) 167 size = NULL; 168 169 /* reset the size object if necessary */ 170 if ( size ) 171 { 172 /* these two objects must have the same parent */ 173 if ( cffsize->face != cffslot->face ) 174 return CFF_Err_Invalid_Face_Handle; 175 } 176 177 /* now load the glyph outline if necessary */ 178 error = cff_slot_load( slot, size, glyph_index, load_flags ); 179 180 /* force drop-out mode to 2 - irrelevant now */ 181 /* slot->outline.dropout_mode = 2; */ 182 183 return error; 184 } 185 186 187 /* 188 * GLYPH DICT SERVICE 189 * 190 */ 191 192 static FT_Error 193 cff_get_glyph_name( CFF_Face face, 194 FT_UInt glyph_index, 195 FT_Pointer buffer, 196 FT_UInt buffer_max ) 197 { 198 CFF_Font font = (CFF_Font)face->extra.data; 199 FT_Memory memory = FT_FACE_MEMORY( face ); 200 FT_String* gname; 201 FT_UShort sid; 202 FT_Service_PsCMaps psnames; 203 FT_Error error; 204 205 206 FT_FACE_FIND_GLOBAL_SERVICE( face, psnames, POSTSCRIPT_CMAPS ); 207 if ( !psnames ) 208 { 209 FT_ERROR(( "cff_get_glyph_name:" )); 210 FT_ERROR(( " cannot get glyph name from CFF & CEF fonts\n" )); 211 FT_ERROR(( " " )); 212 FT_ERROR(( " without the `PSNames' module\n" )); 213 error = CFF_Err_Unknown_File_Format; 214 goto Exit; 215 } 216 217 /* first, locate the sid in the charset table */ 218 sid = font->charset.sids[glyph_index]; 219 220 /* now, lookup the name itself */ 221 gname = cff_index_get_sid_string( &font->string_index, sid, psnames ); 222 223 if ( gname ) 224 FT_STRCPYN( buffer, gname, buffer_max ); 225 226 FT_FREE( gname ); 227 error = CFF_Err_Ok; 228 229 Exit: 230 return error; 231 } 232 233 234 static FT_UInt 235 cff_get_name_index( CFF_Face face, 236 FT_String* glyph_name ) 237 { 238 CFF_Font cff; 239 CFF_Charset charset; 240 FT_Service_PsCMaps psnames; 241 FT_Memory memory = FT_FACE_MEMORY( face ); 242 FT_String* name; 243 FT_UShort sid; 244 FT_UInt i; 245 FT_Int result; 246 247 248 cff = (CFF_FontRec *)face->extra.data; 249 charset = &cff->charset; 250 251 FT_FACE_FIND_GLOBAL_SERVICE( face, psnames, POSTSCRIPT_CMAPS ); 252 if ( !psnames ) 253 return 0; 254 255 for ( i = 0; i < cff->num_glyphs; i++ ) 256 { 257 sid = charset->sids[i]; 258 259 if ( sid > 390 ) 260 name = cff_index_get_name( &cff->string_index, sid - 391 ); 261 else 262 name = (FT_String *)psnames->adobe_std_strings( sid ); 263 264 if ( !name ) 265 continue; 266 267 result = ft_strcmp( glyph_name, name ); 268 269 if ( sid > 390 ) 270 FT_FREE( name ); 271 272 if ( !result ) 273 return i; 274 } 275 276 return 0; 277 } 278 279 280 static const FT_Service_GlyphDictRec cff_service_glyph_dict = 281 { 282 (FT_GlyphDict_GetNameFunc) cff_get_glyph_name, 283 (FT_GlyphDict_NameIndexFunc)cff_get_name_index, 284 }; 285 286 287 /* 288 * POSTSCRIPT INFO SERVICE 289 * 290 */ 291 292 static FT_Int 293 cff_ps_has_glyph_names( FT_Face face ) 294 { 295 return ( face->face_flags & FT_FACE_FLAG_GLYPH_NAMES ) > 0; 296 } 297 298 299 static FT_Error 300 cff_ps_get_font_info( CFF_Face face, 301 PS_FontInfoRec* afont_info ) 302 { 303 CFF_Font cff = (CFF_Font)face->extra.data; 304 FT_Error error = FT_Err_Ok; 305 306 307 if ( cff && cff->font_info == NULL ) 308 { 309 CFF_FontRecDict dict = &cff->top_font.font_dict; 310 PS_FontInfoRec *font_info; 311 FT_Memory memory = face->root.memory; 312 313 314 if ( FT_ALLOC( font_info, sizeof ( *font_info ) ) ) 315 goto Fail; 316 317 font_info->version = cff_index_get_sid_string( &cff->string_index, 318 dict->version, 319 cff->psnames ); 320 font_info->notice = cff_index_get_sid_string( &cff->string_index, 321 dict->notice, 322 cff->psnames ); 323 font_info->full_name = cff_index_get_sid_string( &cff->string_index, 324 dict->full_name, 325 cff->psnames ); 326 font_info->family_name = cff_index_get_sid_string( &cff->string_index, 327 dict->family_name, 328 cff->psnames ); 329 font_info->weight = cff_index_get_sid_string( &cff->string_index, 330 dict->weight, 331 cff->psnames ); 332 font_info->italic_angle = dict->italic_angle; 333 font_info->is_fixed_pitch = dict->is_fixed_pitch; 334 font_info->underline_position = (FT_Short)dict->underline_position; 335 font_info->underline_thickness = (FT_Short)dict->underline_thickness; 336 337 cff->font_info = font_info; 338 } 339 340 *afont_info = *cff->font_info; 341 342 Fail: 343 return error; 344 } 345 346 347 static const FT_Service_PsInfoRec cff_service_ps_info = 348 { 349 (PS_GetFontInfoFunc) cff_ps_get_font_info, 350 (PS_HasGlyphNamesFunc) cff_ps_has_glyph_names, 351 (PS_GetFontPrivateFunc)NULL /* unsupported with CFF fonts */ 352 }; 353 354 355 /* 356 * TT CMAP INFO 357 * 358 * If the charmap is a synthetic Unicode encoding cmap or 359 * a Type 1 standard (or expert) encoding cmap, hide TT CMAP INFO 360 * service defined in SFNT module. 361 * 362 * Otherwise call the service function in the sfnt module. 363 * 364 */ 365 static FT_Error 366 cff_get_cmap_info( FT_CharMap charmap, 367 TT_CMapInfo *cmap_info ) 368 { 369 FT_CMap cmap = FT_CMAP( charmap ); 370 FT_Error error = CFF_Err_Ok; 371 372 373 cmap_info->language = 0; 374 375 if ( cmap->clazz != &cff_cmap_encoding_class_rec && 376 cmap->clazz != &cff_cmap_unicode_class_rec ) 377 { 378 FT_Face face = FT_CMAP_FACE( cmap ); 379 FT_Library library = FT_FACE_LIBRARY( face ); 380 FT_Module sfnt = FT_Get_Module( library, "sfnt" ); 381 FT_Service_TTCMaps service = 382 (FT_Service_TTCMaps)ft_module_get_service( sfnt, 383 FT_SERVICE_ID_TT_CMAP ); 384 385 386 if ( service && service->get_cmap_info ) 387 error = service->get_cmap_info( charmap, cmap_info ); 388 } 389 390 return error; 391 } 392 393 394 static const FT_Service_TTCMapsRec cff_service_get_cmap_info = 395 { 396 (TT_CMap_Info_GetFunc)cff_get_cmap_info 397 }; 398 399 400 /*************************************************************************/ 401 /*************************************************************************/ 402 /*************************************************************************/ 403 /**** ****/ 404 /**** ****/ 405 /**** D R I V E R I N T E R F A C E ****/ 406 /**** ****/ 407 /**** ****/ 408 /*************************************************************************/ 409 /*************************************************************************/ 410 /*************************************************************************/ 411 412 static const FT_ServiceDescRec cff_services[] = 413 { 414 { FT_SERVICE_ID_XF86_NAME, FT_XF86_FORMAT_CFF }, 415 { FT_SERVICE_ID_POSTSCRIPT_INFO, &cff_service_ps_info }, 416#ifndef FT_CONFIG_OPTION_NO_GLYPH_NAMES 417 { FT_SERVICE_ID_GLYPH_DICT, &cff_service_glyph_dict }, 418#endif 419 { FT_SERVICE_ID_TT_CMAP, &cff_service_get_cmap_info }, 420 { NULL, NULL } 421 }; 422 423 424 FT_CALLBACK_DEF( FT_Module_Interface ) 425 cff_get_interface( FT_Module driver, /* CFF_Driver */ 426 const char* module_interface ) 427 { 428 FT_Module sfnt; 429 FT_Module_Interface result; 430 431 432 result = ft_service_list_lookup( cff_services, module_interface ); 433 if ( result != NULL ) 434 return result; 435 436 /* we pass our request to the `sfnt' module */ 437 sfnt = FT_Get_Module( driver->library, "sfnt" ); 438 439 return sfnt ? sfnt->clazz->get_interface( sfnt, module_interface ) : 0; 440 } 441 442 443 /* The FT_DriverInterface structure is defined in ftdriver.h. */ 444 445 FT_CALLBACK_TABLE_DEF 446 const FT_Driver_ClassRec cff_driver_class = 447 { 448 /* begin with the FT_Module_Class fields */ 449 { 450 FT_MODULE_FONT_DRIVER | 451 FT_MODULE_DRIVER_SCALABLE | 452 FT_MODULE_DRIVER_HAS_HINTER, 453 454 sizeof( CFF_DriverRec ), 455 "cff", 456 0x10000L, 457 0x20000L, 458 459 0, /* module-specific interface */ 460 461 cff_driver_init, 462 cff_driver_done, 463 cff_get_interface, 464 }, 465 466 /* now the specific driver fields */ 467 sizeof( TT_FaceRec ), 468 sizeof( CFF_SizeRec ), 469 sizeof( CFF_GlyphSlotRec ), 470 471 cff_face_init, 472 cff_face_done, 473 cff_size_init, 474 cff_size_done, 475 cff_slot_init, 476 cff_slot_done, 477 478#ifdef FT_CONFIG_OPTION_OLD_INTERNALS 479 ft_stub_set_char_sizes, 480 ft_stub_set_pixel_sizes, 481#endif 482 483 Load_Glyph, 484 485 cff_get_kerning, 486 0, /* FT_Face_AttachFunc */ 487 0, /* FT_Face_GetAdvancesFunc */ 488 489 cff_size_request, 490 491#ifdef TT_CONFIG_OPTION_EMBEDDED_BITMAPS 492 cff_size_select 493#else 494 0 /* FT_Size_SelectFunc */ 495#endif 496 }; 497 498 499/* END */ 500