1 /***************************************************************************/ 2 /* */ 3 /* ftobjs.h */ 4 /* */ 5 /* The FreeType private base classes (specification). */ 6 /* */ 7 /* Copyright 1996-2001, 2002, 2003, 2004, 2005, 2006, 2008 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 /*************************************************************************/ 20 /* */ 21 /* This file contains the definition of all internal FreeType classes. */ 22 /* */ 23 /*************************************************************************/ 24 25 26 #ifndef __FTOBJS_H__ 27 #define __FTOBJS_H__ 28 29 #include <ft2build.h> 30 #include FT_RENDER_H 31 #include FT_SIZES_H 32 #include FT_LCD_FILTER_H 33 #include FT_INTERNAL_MEMORY_H 34 #include FT_INTERNAL_GLYPH_LOADER_H 35 #include FT_INTERNAL_DRIVER_H 36 #include FT_INTERNAL_AUTOHINT_H 37 #include FT_INTERNAL_SERVICE_H 38 39 #ifdef FT_CONFIG_OPTION_INCREMENTAL 40 #include FT_INCREMENTAL_H 41 #endif 42 43 44 FT_BEGIN_HEADER 45 46 47 /*************************************************************************/ 48 /* */ 49 /* Some generic definitions. */ 50 /* */ 51 #ifndef TRUE 52 #define TRUE 1 53 #endif 54 55 #ifndef FALSE 56 #define FALSE 0 57 #endif 58 59 #ifndef NULL 60 #define NULL (void*)0 61 #endif 62 63 64 /*************************************************************************/ 65 /* */ 66 /* The min and max functions missing in C. As usual, be careful not to */ 67 /* write things like FT_MIN( a++, b++ ) to avoid side effects. */ 68 /* */ 69 #define FT_MIN( a, b ) ( (a) < (b) ? (a) : (b) ) 70 #define FT_MAX( a, b ) ( (a) > (b) ? (a) : (b) ) 71 72 #define FT_ABS( a ) ( (a) < 0 ? -(a) : (a) ) 73 74 75 #define FT_PAD_FLOOR( x, n ) ( (x) & ~((n)-1) ) 76 #define FT_PAD_ROUND( x, n ) FT_PAD_FLOOR( (x) + ((n)/2), n ) 77 #define FT_PAD_CEIL( x, n ) FT_PAD_FLOOR( (x) + ((n)-1), n ) 78 79 #define FT_PIX_FLOOR( x ) ( (x) & ~63 ) 80 #define FT_PIX_ROUND( x ) FT_PIX_FLOOR( (x) + 32 ) 81 #define FT_PIX_CEIL( x ) FT_PIX_FLOOR( (x) + 63 ) 82 83 84 /* 85 * Return the highest power of 2 that is <= value; this correspond to 86 * the highest bit in a given 32-bit value. 87 */ 88 FT_BASE( FT_UInt32 ) 89 ft_highpow2( FT_UInt32 value ); 90 91 92 /* 93 * character classification functions -- since these are used to parse 94 * font files, we must not use those in <ctypes.h> which are 95 * locale-dependent 96 */ 97 #define ft_isdigit( x ) ( ( (unsigned)(x) - '0' ) < 10U ) 98 99 #define ft_isxdigit( x ) ( ( (unsigned)(x) - '0' ) < 10U || \ 100 ( (unsigned)(x) - 'a' ) < 6U || \ 101 ( (unsigned)(x) - 'A' ) < 6U ) 102 103 /* the next two macros assume ASCII representation */ 104 #define ft_isupper( x ) ( ( (unsigned)(x) - 'A' ) < 26U ) 105 #define ft_islower( x ) ( ( (unsigned)(x) - 'a' ) < 26U ) 106 107 #define ft_isalpha( x ) ( ft_isupper( x ) || ft_islower( x ) ) 108 #define ft_isalnum( x ) ( ft_isdigit( x ) || ft_isalpha( x ) ) 109 110 111 /*************************************************************************/ 112 /*************************************************************************/ 113 /*************************************************************************/ 114 /**** ****/ 115 /**** ****/ 116 /**** C H A R M A P S ****/ 117 /**** ****/ 118 /**** ****/ 119 /*************************************************************************/ 120 /*************************************************************************/ 121 /*************************************************************************/ 122 123 /* handle to internal charmap object */ 124 typedef struct FT_CMapRec_* FT_CMap; 125 126 /* handle to charmap class structure */ 127 typedef const struct FT_CMap_ClassRec_* FT_CMap_Class; 128 129 /* internal charmap object structure */ 130 typedef struct FT_CMapRec_ 131 { 132 FT_CharMapRec charmap; 133 FT_CMap_Class clazz; 134 135 } FT_CMapRec; 136 137 /* typecase any pointer to a charmap handle */ 138 #define FT_CMAP( x ) ((FT_CMap)( x )) 139 140 /* obvious macros */ 141 #define FT_CMAP_PLATFORM_ID( x ) FT_CMAP( x )->charmap.platform_id 142 #define FT_CMAP_ENCODING_ID( x ) FT_CMAP( x )->charmap.encoding_id 143 #define FT_CMAP_ENCODING( x ) FT_CMAP( x )->charmap.encoding 144 #define FT_CMAP_FACE( x ) FT_CMAP( x )->charmap.face 145 146 147 /* class method definitions */ 148 typedef FT_Error 149 (*FT_CMap_InitFunc)( FT_CMap cmap, 150 FT_Pointer init_data ); 151 152 typedef void 153 (*FT_CMap_DoneFunc)( FT_CMap cmap ); 154 155 typedef FT_UInt 156 (*FT_CMap_CharIndexFunc)( FT_CMap cmap, 157 FT_UInt32 char_code ); 158 159 typedef FT_UInt 160 (*FT_CMap_CharNextFunc)( FT_CMap cmap, 161 FT_UInt32 *achar_code ); 162 163 typedef FT_UInt 164 (*FT_CMap_CharVarIndexFunc)( FT_CMap cmap, 165 FT_CMap unicode_cmap, 166 FT_UInt32 char_code, 167 FT_UInt32 variant_selector ); 168 169 typedef FT_Bool 170 (*FT_CMap_CharVarIsDefaultFunc)( FT_CMap cmap, 171 FT_UInt32 char_code, 172 FT_UInt32 variant_selector ); 173 174 typedef FT_UInt32 * 175 (*FT_CMap_VariantListFunc)( FT_CMap cmap, 176 FT_Memory mem ); 177 178 typedef FT_UInt32 * 179 (*FT_CMap_CharVariantListFunc)( FT_CMap cmap, 180 FT_Memory mem, 181 FT_UInt32 char_code ); 182 183 typedef FT_UInt32 * 184 (*FT_CMap_VariantCharListFunc)( FT_CMap cmap, 185 FT_Memory mem, 186 FT_UInt32 variant_selector ); 187 188 189 typedef struct FT_CMap_ClassRec_ 190 { 191 FT_ULong size; 192 FT_CMap_InitFunc init; 193 FT_CMap_DoneFunc done; 194 FT_CMap_CharIndexFunc char_index; 195 FT_CMap_CharNextFunc char_next; 196 197 /* Subsequent entries are special ones for format 14 -- the variant */ 198 /* selector subtable which behaves like no other */ 199 200 FT_CMap_CharVarIndexFunc char_var_index; 201 FT_CMap_CharVarIsDefaultFunc char_var_default; 202 FT_CMap_VariantListFunc variant_list; 203 FT_CMap_CharVariantListFunc charvariant_list; 204 FT_CMap_VariantCharListFunc variantchar_list; 205 206 } FT_CMap_ClassRec; 207 208 209 /* create a new charmap and add it to charmap->face */ 210 FT_BASE( FT_Error ) 211 FT_CMap_New( FT_CMap_Class clazz, 212 FT_Pointer init_data, 213 FT_CharMap charmap, 214 FT_CMap *acmap ); 215 216 /* destroy a charmap and remove it from face's list */ 217 FT_BASE( void ) 218 FT_CMap_Done( FT_CMap cmap ); 219 220 221 /*************************************************************************/ 222 /* */ 223 /* <Struct> */ 224 /* FT_Face_InternalRec */ 225 /* */ 226 /* <Description> */ 227 /* This structure contains the internal fields of each FT_Face */ 228 /* object. These fields may change between different releases of */ 229 /* FreeType. */ 230 /* */ 231 /* <Fields> */ 232 /* max_points :: */ 233 /* The maximal number of points used to store the vectorial outline */ 234 /* of any glyph in this face. If this value cannot be known in */ 235 /* advance, or if the face isn't scalable, this should be set to 0. */ 236 /* Only relevant for scalable formats. */ 237 /* */ 238 /* max_contours :: */ 239 /* The maximal number of contours used to store the vectorial */ 240 /* outline of any glyph in this face. If this value cannot be */ 241 /* known in advance, or if the face isn't scalable, this should be */ 242 /* set to 0. Only relevant for scalable formats. */ 243 /* */ 244 /* transform_matrix :: */ 245 /* A 2x2 matrix of 16.16 coefficients used to transform glyph */ 246 /* outlines after they are loaded from the font. Only used by the */ 247 /* convenience functions. */ 248 /* */ 249 /* transform_delta :: */ 250 /* A translation vector used to transform glyph outlines after they */ 251 /* are loaded from the font. Only used by the convenience */ 252 /* functions. */ 253 /* */ 254 /* transform_flags :: */ 255 /* Some flags used to classify the transform. Only used by the */ 256 /* convenience functions. */ 257 /* */ 258 /* services :: */ 259 /* A cache for frequently used services. It should be only */ 260 /* accessed with the macro `FT_FACE_LOOKUP_SERVICE'. */ 261 /* */ 262 /* incremental_interface :: */ 263 /* If non-null, the interface through which glyph data and metrics */ 264 /* are loaded incrementally for faces that do not provide all of */ 265 /* this data when first opened. This field exists only if */ 266 /* @FT_CONFIG_OPTION_INCREMENTAL is defined. */ 267 /* */ 268 /* ignore_unpatented_hinter :: */ 269 /* This boolean flag instructs the glyph loader to ignore the */ 270 /* native font hinter, if one is found. This is exclusively used */ 271 /* in the case when the unpatented hinter is compiled within the */ 272 /* library. */ 273 /* */ 274 typedef struct FT_Face_InternalRec_ 275 { 276 #ifdef FT_CONFIG_OPTION_OLD_INTERNALS 277 FT_UShort reserved1; 278 FT_Short reserved2; 279 #endif 280 FT_Matrix transform_matrix; 281 FT_Vector transform_delta; 282 FT_Int transform_flags; 283 284 FT_ServiceCacheRec services; 285 286 #ifdef FT_CONFIG_OPTION_INCREMENTAL 287 FT_Incremental_InterfaceRec* incremental_interface; 288 #endif 289 290 FT_Bool ignore_unpatented_hinter; 291 292 } FT_Face_InternalRec; 293 294 295 /*************************************************************************/ 296 /* */ 297 /* <Struct> */ 298 /* FT_Slot_InternalRec */ 299 /* */ 300 /* <Description> */ 301 /* This structure contains the internal fields of each FT_GlyphSlot */ 302 /* object. These fields may change between different releases of */ 303 /* FreeType. */ 304 /* */ 305 /* <Fields> */ 306 /* loader :: The glyph loader object used to load outlines */ 307 /* into the glyph slot. */ 308 /* */ 309 /* flags :: Possible values are zero or */ 310 /* FT_GLYPH_OWN_BITMAP. The latter indicates */ 311 /* that the FT_GlyphSlot structure owns the */ 312 /* bitmap buffer. */ 313 /* */ 314 /* glyph_transformed :: Boolean. Set to TRUE when the loaded glyph */ 315 /* must be transformed through a specific */ 316 /* font transformation. This is _not_ the same */ 317 /* as the face transform set through */ 318 /* FT_Set_Transform(). */ 319 /* */ 320 /* glyph_matrix :: The 2x2 matrix corresponding to the glyph */ 321 /* transformation, if necessary. */ 322 /* */ 323 /* glyph_delta :: The 2d translation vector corresponding to */ 324 /* the glyph transformation, if necessary. */ 325 /* */ 326 /* glyph_hints :: Format-specific glyph hints management. */ 327 /* */ 328 329 #define FT_GLYPH_OWN_BITMAP 0x1 330 331 typedef struct FT_Slot_InternalRec_ 332 { 333 FT_GlyphLoader loader; 334 FT_UInt flags; 335 FT_Bool glyph_transformed; 336 FT_Matrix glyph_matrix; 337 FT_Vector glyph_delta; 338 void* glyph_hints; 339 340 } FT_GlyphSlot_InternalRec; 341 342 343 #if 0 344 345 /*************************************************************************/ 346 /* */ 347 /* <Struct> */ 348 /* FT_Size_InternalRec */ 349 /* */ 350 /* <Description> */ 351 /* This structure contains the internal fields of each FT_Size */ 352 /* object. Currently, it's empty. */ 353 /* */ 354 /*************************************************************************/ 355 356 typedef struct FT_Size_InternalRec_ 357 { 358 /* empty */ 359 360 } FT_Size_InternalRec; 361 362 #endif 363 364 365 /*************************************************************************/ 366 /*************************************************************************/ 367 /**** ****/ 368 /**** ****/ 369 /**** M O D U L E S ****/ 370 /**** ****/ 371 /**** ****/ 372 /*************************************************************************/ 373 /*************************************************************************/ 374 /*************************************************************************/ 375 376 377 /*************************************************************************/ 378 /* */ 379 /* <Struct> */ 380 /* FT_ModuleRec */ 381 /* */ 382 /* <Description> */ 383 /* A module object instance. */ 384 /* */ 385 /* <Fields> */ 386 /* clazz :: A pointer to the module's class. */ 387 /* */ 388 /* library :: A handle to the parent library object. */ 389 /* */ 390 /* memory :: A handle to the memory manager. */ 391 /* */ 392 /* generic :: A generic structure for user-level extensibility (?). */ 393 /* */ 394 typedef struct FT_ModuleRec_ 395 { 396 FT_Module_Class* clazz; 397 FT_Library library; 398 FT_Memory memory; 399 FT_Generic generic; 400 401 } FT_ModuleRec; 402 403 404 /* typecast an object to a FT_Module */ 405 #define FT_MODULE( x ) ((FT_Module)( x )) 406 #define FT_MODULE_CLASS( x ) FT_MODULE( x )->clazz 407 #define FT_MODULE_LIBRARY( x ) FT_MODULE( x )->library 408 #define FT_MODULE_MEMORY( x ) FT_MODULE( x )->memory 409 410 411 #define FT_MODULE_IS_DRIVER( x ) ( FT_MODULE_CLASS( x )->module_flags & \ 412 FT_MODULE_FONT_DRIVER ) 413 414 #define FT_MODULE_IS_RENDERER( x ) ( FT_MODULE_CLASS( x )->module_flags & \ 415 FT_MODULE_RENDERER ) 416 417 #define FT_MODULE_IS_HINTER( x ) ( FT_MODULE_CLASS( x )->module_flags & \ 418 FT_MODULE_HINTER ) 419 420 #define FT_MODULE_IS_STYLER( x ) ( FT_MODULE_CLASS( x )->module_flags & \ 421 FT_MODULE_STYLER ) 422 423 #define FT_DRIVER_IS_SCALABLE( x ) ( FT_MODULE_CLASS( x )->module_flags & \ 424 FT_MODULE_DRIVER_SCALABLE ) 425 426 #define FT_DRIVER_USES_OUTLINES( x ) !( FT_MODULE_CLASS( x )->module_flags & \ 427 FT_MODULE_DRIVER_NO_OUTLINES ) 428 429 #define FT_DRIVER_HAS_HINTER( x ) ( FT_MODULE_CLASS( x )->module_flags & \ 430 FT_MODULE_DRIVER_HAS_HINTER ) 431 432 433 /*************************************************************************/ 434 /* */ 435 /* <Function> */ 436 /* FT_Get_Module_Interface */ 437 /* */ 438 /* <Description> */ 439 /* Finds a module and returns its specific interface as a typeless */ 440 /* pointer. */ 441 /* */ 442 /* <Input> */ 443 /* library :: A handle to the library object. */ 444 /* */ 445 /* module_name :: The module's name (as an ASCII string). */ 446 /* */ 447 /* <Return> */ 448 /* A module-specific interface if available, 0 otherwise. */ 449 /* */ 450 /* <Note> */ 451 /* You should better be familiar with FreeType internals to know */ 452 /* which module to look for, and what its interface is :-) */ 453 /* */ 454 FT_BASE( const void* ) 455 FT_Get_Module_Interface( FT_Library library, 456 const char* mod_name ); 457 458 FT_BASE( FT_Pointer ) 459 ft_module_get_service( FT_Module module, 460 const char* service_id ); 461 462 /* */ 463 464 465 /*************************************************************************/ 466 /*************************************************************************/ 467 /*************************************************************************/ 468 /**** ****/ 469 /**** ****/ 470 /**** FACE, SIZE & GLYPH SLOT OBJECTS ****/ 471 /**** ****/ 472 /**** ****/ 473 /*************************************************************************/ 474 /*************************************************************************/ 475 /*************************************************************************/ 476 477 /* a few macros used to perform easy typecasts with minimal brain damage */ 478 479 #define FT_FACE( x ) ((FT_Face)(x)) 480 #define FT_SIZE( x ) ((FT_Size)(x)) 481 #define FT_SLOT( x ) ((FT_GlyphSlot)(x)) 482 483 #define FT_FACE_DRIVER( x ) FT_FACE( x )->driver 484 #define FT_FACE_LIBRARY( x ) FT_FACE_DRIVER( x )->root.library 485 #define FT_FACE_MEMORY( x ) FT_FACE( x )->memory 486 #define FT_FACE_STREAM( x ) FT_FACE( x )->stream 487 488 #define FT_SIZE_FACE( x ) FT_SIZE( x )->face 489 #define FT_SLOT_FACE( x ) FT_SLOT( x )->face 490 491 #define FT_FACE_SLOT( x ) FT_FACE( x )->glyph 492 #define FT_FACE_SIZE( x ) FT_FACE( x )->size 493 494 495 /*************************************************************************/ 496 /* */ 497 /* <Function> */ 498 /* FT_New_GlyphSlot */ 499 /* */ 500 /* <Description> */ 501 /* It is sometimes useful to have more than one glyph slot for a */ 502 /* given face object. This function is used to create additional */ 503 /* slots. All of them are automatically discarded when the face is */ 504 /* destroyed. */ 505 /* */ 506 /* <Input> */ 507 /* face :: A handle to a parent face object. */ 508 /* */ 509 /* <Output> */ 510 /* aslot :: A handle to a new glyph slot object. */ 511 /* */ 512 /* <Return> */ 513 /* FreeType error code. 0 means success. */ 514 /* */ 515 FT_BASE( FT_Error ) 516 FT_New_GlyphSlot( FT_Face face, 517 FT_GlyphSlot *aslot ); 518 519 520 /*************************************************************************/ 521 /* */ 522 /* <Function> */ 523 /* FT_Done_GlyphSlot */ 524 /* */ 525 /* <Description> */ 526 /* Destroys a given glyph slot. Remember however that all slots are */ 527 /* automatically destroyed with its parent. Using this function is */ 528 /* not always mandatory. */ 529 /* */ 530 /* <Input> */ 531 /* slot :: A handle to a target glyph slot. */ 532 /* */ 533 FT_BASE( void ) 534 FT_Done_GlyphSlot( FT_GlyphSlot slot ); 535 536 /* */ 537 538 #define FT_REQUEST_WIDTH( req ) \ 539 ( (req)->horiResolution \ 540 ? (FT_Pos)( (req)->width * (req)->horiResolution + 36 ) / 72 \ 541 : (req)->width ) 542 543 #define FT_REQUEST_HEIGHT( req ) \ 544 ( (req)->vertResolution \ 545 ? (FT_Pos)( (req)->height * (req)->vertResolution + 36 ) / 72 \ 546 : (req)->height ) 547 548 549 /* Set the metrics according to a bitmap strike. */ 550 FT_BASE( void ) 551 FT_Select_Metrics( FT_Face face, 552 FT_ULong strike_index ); 553 554 555 /* Set the metrics according to a size request. */ 556 FT_BASE( void ) 557 FT_Request_Metrics( FT_Face face, 558 FT_Size_Request req ); 559 560 561 /* Match a size request against `available_sizes'. */ 562 FT_BASE( FT_Error ) 563 FT_Match_Size( FT_Face face, 564 FT_Size_Request req, 565 FT_Bool ignore_width, 566 FT_ULong* size_index ); 567 568 569 /* Use the horizontal metrics to synthesize the vertical metrics. */ 570 /* If `advance' is zero, it is also synthesized. */ 571 FT_BASE( void ) 572 ft_synthesize_vertical_metrics( FT_Glyph_Metrics* metrics, 573 FT_Pos advance ); 574 575 576 /* Free the bitmap of a given glyphslot when needed (i.e., only when it */ 577 /* was allocated with ft_glyphslot_alloc_bitmap). */ 578 FT_BASE( void ) 579 ft_glyphslot_free_bitmap( FT_GlyphSlot slot ); 580 581 582 /* Allocate a new bitmap buffer in a glyph slot. */ 583 FT_BASE( FT_Error ) 584 ft_glyphslot_alloc_bitmap( FT_GlyphSlot slot, 585 FT_ULong size ); 586 587 588 /* Set the bitmap buffer in a glyph slot to a given pointer. The buffer */ 589 /* will not be freed by a later call to ft_glyphslot_free_bitmap. */ 590 FT_BASE( void ) 591 ft_glyphslot_set_bitmap( FT_GlyphSlot slot, 592 FT_Byte* buffer ); 593 594 595 /*************************************************************************/ 596 /*************************************************************************/ 597 /*************************************************************************/ 598 /**** ****/ 599 /**** ****/ 600 /**** R E N D E R E R S ****/ 601 /**** ****/ 602 /**** ****/ 603 /*************************************************************************/ 604 /*************************************************************************/ 605 /*************************************************************************/ 606 607 608 #define FT_RENDERER( x ) ((FT_Renderer)( x )) 609 #define FT_GLYPH( x ) ((FT_Glyph)( x )) 610 #define FT_BITMAP_GLYPH( x ) ((FT_BitmapGlyph)( x )) 611 #define FT_OUTLINE_GLYPH( x ) ((FT_OutlineGlyph)( x )) 612 613 614 typedef struct FT_RendererRec_ 615 { 616 FT_ModuleRec root; 617 FT_Renderer_Class* clazz; 618 FT_Glyph_Format glyph_format; 619 FT_Glyph_Class glyph_class; 620 621 FT_Raster raster; 622 FT_Raster_Render_Func raster_render; 623 FT_Renderer_RenderFunc render; 624 625 } FT_RendererRec; 626 627 628 /*************************************************************************/ 629 /*************************************************************************/ 630 /*************************************************************************/ 631 /**** ****/ 632 /**** ****/ 633 /**** F O N T D R I V E R S ****/ 634 /**** ****/ 635 /**** ****/ 636 /*************************************************************************/ 637 /*************************************************************************/ 638 /*************************************************************************/ 639 640 641 /* typecast a module into a driver easily */ 642 #define FT_DRIVER( x ) ((FT_Driver)(x)) 643 644 /* typecast a module as a driver, and get its driver class */ 645 #define FT_DRIVER_CLASS( x ) FT_DRIVER( x )->clazz 646 647 648 /*************************************************************************/ 649 /* */ 650 /* <Struct> */ 651 /* FT_DriverRec */ 652 /* */ 653 /* <Description> */ 654 /* The root font driver class. A font driver is responsible for */ 655 /* managing and loading font files of a given format. */ 656 /* */ 657 /* <Fields> */ 658 /* root :: Contains the fields of the root module class. */ 659 /* */ 660 /* clazz :: A pointer to the font driver's class. Note that */ 661 /* this is NOT root.clazz. `class' wasn't used */ 662 /* as it is a reserved word in C++. */ 663 /* */ 664 /* faces_list :: The list of faces currently opened by this */ 665 /* driver. */ 666 /* */ 667 /* extensions :: A typeless pointer to the driver's extensions */ 668 /* registry, if they are supported through the */ 669 /* configuration macro FT_CONFIG_OPTION_EXTENSIONS. */ 670 /* */ 671 /* glyph_loader :: The glyph loader for all faces managed by this */ 672 /* driver. This object isn't defined for unscalable */ 673 /* formats. */ 674 /* */ 675 typedef struct FT_DriverRec_ 676 { 677 FT_ModuleRec root; 678 FT_Driver_Class clazz; 679 680 FT_ListRec faces_list; 681 void* extensions; 682 683 FT_GlyphLoader glyph_loader; 684 685 } FT_DriverRec; 686 687 688 /*************************************************************************/ 689 /*************************************************************************/ 690 /*************************************************************************/ 691 /**** ****/ 692 /**** ****/ 693 /**** L I B R A R I E S ****/ 694 /**** ****/ 695 /**** ****/ 696 /*************************************************************************/ 697 /*************************************************************************/ 698 /*************************************************************************/ 699 700 701 /* This hook is used by the TrueType debugger. It must be set to an */ 702 /* alternate truetype bytecode interpreter function. */ 703 #define FT_DEBUG_HOOK_TRUETYPE 0 704 705 706 /* Set this debug hook to a non-null pointer to force unpatented hinting */ 707 /* for all faces when both TT_USE_BYTECODE_INTERPRETER and */ 708 /* TT_CONFIG_OPTION_UNPATENTED_HINTING are defined. This is only used */ 709 /* during debugging. */ 710 #define FT_DEBUG_HOOK_UNPATENTED_HINTING 1 711 712 713 typedef void (*FT_Bitmap_LcdFilterFunc)( FT_Bitmap* bitmap, 714 FT_Render_Mode render_mode, 715 FT_Library library ); 716 717 718 /*************************************************************************/ 719 /* */ 720 /* <Struct> */ 721 /* FT_LibraryRec */ 722 /* */ 723 /* <Description> */ 724 /* The FreeType library class. This is the root of all FreeType */ 725 /* data. Use FT_New_Library() to create a library object, and */ 726 /* FT_Done_Library() to discard it and all child objects. */ 727 /* */ 728 /* <Fields> */ 729 /* memory :: The library's memory object. Manages memory */ 730 /* allocation. */ 731 /* */ 732 /* generic :: Client data variable. Used to extend the */ 733 /* Library class by higher levels and clients. */ 734 /* */ 735 /* version_major :: The major version number of the library. */ 736 /* */ 737 /* version_minor :: The minor version number of the library. */ 738 /* */ 739 /* version_patch :: The current patch level of the library. */ 740 /* */ 741 /* num_modules :: The number of modules currently registered */ 742 /* within this library. This is set to 0 for new */ 743 /* libraries. New modules are added through the */ 744 /* FT_Add_Module() API function. */ 745 /* */ 746 /* modules :: A table used to store handles to the currently */ 747 /* registered modules. Note that each font driver */ 748 /* contains a list of its opened faces. */ 749 /* */ 750 /* renderers :: The list of renderers currently registered */ 751 /* within the library. */ 752 /* */ 753 /* cur_renderer :: The current outline renderer. This is a */ 754 /* shortcut used to avoid parsing the list on */ 755 /* each call to FT_Outline_Render(). It is a */ 756 /* handle to the current renderer for the */ 757 /* FT_GLYPH_FORMAT_OUTLINE format. */ 758 /* */ 759 /* auto_hinter :: XXX */ 760 /* */ 761 /* raster_pool :: The raster object's render pool. This can */ 762 /* ideally be changed dynamically at run-time. */ 763 /* */ 764 /* raster_pool_size :: The size of the render pool in bytes. */ 765 /* */ 766 /* debug_hooks :: XXX */ 767 /* */ 768 typedef struct FT_LibraryRec_ 769 { 770 FT_Memory memory; /* library's memory manager */ 771 772 FT_Generic generic; 773 774 FT_Int version_major; 775 FT_Int version_minor; 776 FT_Int version_patch; 777 778 FT_UInt num_modules; 779 FT_Module modules[FT_MAX_MODULES]; /* module objects */ 780 781 FT_ListRec renderers; /* list of renderers */ 782 FT_Renderer cur_renderer; /* current outline renderer */ 783 FT_Module auto_hinter; 784 785 FT_Byte* raster_pool; /* scan-line conversion */ 786 /* render pool */ 787 FT_ULong raster_pool_size; /* size of render pool in bytes */ 788 789 FT_DebugHook_Func debug_hooks[4]; 790 791 #ifdef FT_CONFIG_OPTION_SUBPIXEL_RENDERING 792 FT_LcdFilter lcd_filter; 793 FT_Int lcd_extra; /* number of extra pixels */ 794 FT_Byte lcd_weights[7]; /* filter weights, if any */ 795 FT_Bitmap_LcdFilterFunc lcd_filter_func; /* filtering callback */ 796 #endif 797 798 } FT_LibraryRec; 799 800 801 FT_BASE( FT_Renderer ) 802 FT_Lookup_Renderer( FT_Library library, 803 FT_Glyph_Format format, 804 FT_ListNode* node ); 805 806 FT_BASE( FT_Error ) 807 FT_Render_Glyph_Internal( FT_Library library, 808 FT_GlyphSlot slot, 809 FT_Render_Mode render_mode ); 810 811 typedef const char* 812 (*FT_Face_GetPostscriptNameFunc)( FT_Face face ); 813 814 typedef FT_Error 815 (*FT_Face_GetGlyphNameFunc)( FT_Face face, 816 FT_UInt glyph_index, 817 FT_Pointer buffer, 818 FT_UInt buffer_max ); 819 820 typedef FT_UInt 821 (*FT_Face_GetGlyphNameIndexFunc)( FT_Face face, 822 FT_String* glyph_name ); 823 824 825 #ifndef FT_CONFIG_OPTION_NO_DEFAULT_SYSTEM 826 827 /*************************************************************************/ 828 /* */ 829 /* <Function> */ 830 /* FT_New_Memory */ 831 /* */ 832 /* <Description> */ 833 /* Creates a new memory object. */ 834 /* */ 835 /* <Return> */ 836 /* A pointer to the new memory object. 0 in case of error. */ 837 /* */ 838 FT_BASE( FT_Memory ) 839 FT_New_Memory( void ); 840 841 842 /*************************************************************************/ 843 /* */ 844 /* <Function> */ 845 /* FT_Done_Memory */ 846 /* */ 847 /* <Description> */ 848 /* Discards memory manager. */ 849 /* */ 850 /* <Input> */ 851 /* memory :: A handle to the memory manager. */ 852 /* */ 853 FT_BASE( void ) 854 FT_Done_Memory( FT_Memory memory ); 855 856 #endif /* !FT_CONFIG_OPTION_NO_DEFAULT_SYSTEM */ 857 858 859 /* Define default raster's interface. The default raster is located in */ 860 /* `src/base/ftraster.c'. */ 861 /* */ 862 /* Client applications can register new rasters through the */ 863 /* FT_Set_Raster() API. */ 864 865 #ifndef FT_NO_DEFAULT_RASTER 866 FT_EXPORT_VAR( FT_Raster_Funcs ) ft_default_raster; 867 #endif 868 869 870 FT_END_HEADER 871 872 #endif /* __FTOBJS_H__ */ 873 874 875 /* END */ 876