/src/freetype/include/freetype/internal/ftobjs.h
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1/***************************************************************************/ 2/* */ 3/* ftobjs.h */ 4/* */ 5/* The FreeType private base classes (specification). */ 6/* */ 7/* Copyright 1996-2006, 2008, 2010, 2012 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#include FT_INTERNAL_PIC_H 39 40#ifdef FT_CONFIG_OPTION_INCREMENTAL 41#include FT_INCREMENTAL_H 42#endif 43 44 45FT_BEGIN_HEADER 46 47 48 /*************************************************************************/ 49 /* */ 50 /* Some generic definitions. */ 51 /* */ 52#ifndef TRUE 53#define TRUE 1 54#endif 55 56#ifndef FALSE 57#define FALSE 0 58#endif 59 60#ifndef NULL 61#define NULL (void*)0 62#endif 63 64 65 /*************************************************************************/ 66 /* */ 67 /* The min and max functions missing in C. As usual, be careful not to */ 68 /* write things like FT_MIN( a++, b++ ) to avoid side effects. */ 69 /* */ 70#define FT_MIN( a, b ) ( (a) < (b) ? (a) : (b) ) 71#define FT_MAX( a, b ) ( (a) > (b) ? (a) : (b) ) 72 73#define FT_ABS( a ) ( (a) < 0 ? -(a) : (a) ) 74 75 76#define FT_PAD_FLOOR( x, n ) ( (x) & ~((n)-1) ) 77#define FT_PAD_ROUND( x, n ) FT_PAD_FLOOR( (x) + ((n)/2), n ) 78#define FT_PAD_CEIL( x, n ) FT_PAD_FLOOR( (x) + ((n)-1), n ) 79 80#define FT_PIX_FLOOR( x ) ( (x) & ~63 ) 81#define FT_PIX_ROUND( x ) FT_PIX_FLOOR( (x) + 32 ) 82#define FT_PIX_CEIL( x ) FT_PIX_FLOOR( (x) + 63 ) 83 84 85 /* 86 * Return the highest power of 2 that is <= value; this correspond to 87 * the highest bit in a given 32-bit value. 88 */ 89 FT_BASE( FT_UInt32 ) 90 ft_highpow2( FT_UInt32 value ); 91 92 93 /* 94 * character classification functions -- since these are used to parse 95 * font files, we must not use those in <ctypes.h> which are 96 * locale-dependent 97 */ 98#define ft_isdigit( x ) ( ( (unsigned)(x) - '0' ) < 10U ) 99 100#define ft_isxdigit( x ) ( ( (unsigned)(x) - '0' ) < 10U || \ 101 ( (unsigned)(x) - 'a' ) < 6U || \ 102 ( (unsigned)(x) - 'A' ) < 6U ) 103 104 /* the next two macros assume ASCII representation */ 105#define ft_isupper( x ) ( ( (unsigned)(x) - 'A' ) < 26U ) 106#define ft_islower( x ) ( ( (unsigned)(x) - 'a' ) < 26U ) 107 108#define ft_isalpha( x ) ( ft_isupper( x ) || ft_islower( x ) ) 109#define ft_isalnum( x ) ( ft_isdigit( x ) || ft_isalpha( x ) ) 110 111 112 /*************************************************************************/ 113 /*************************************************************************/ 114 /*************************************************************************/ 115 /**** ****/ 116 /**** ****/ 117 /**** C H A R M A P S ****/ 118 /**** ****/ 119 /**** ****/ 120 /*************************************************************************/ 121 /*************************************************************************/ 122 /*************************************************************************/ 123 124 /* handle to internal charmap object */ 125 typedef struct FT_CMapRec_* FT_CMap; 126 127 /* handle to charmap class structure */ 128 typedef const struct FT_CMap_ClassRec_* FT_CMap_Class; 129 130 /* internal charmap object structure */ 131 typedef struct FT_CMapRec_ 132 { 133 FT_CharMapRec charmap; 134 FT_CMap_Class clazz; 135 136 } FT_CMapRec; 137 138 /* typecase any pointer to a charmap handle */ 139#define FT_CMAP( x ) ((FT_CMap)( x )) 140 141 /* obvious macros */ 142#define FT_CMAP_PLATFORM_ID( x ) FT_CMAP( x )->charmap.platform_id 143#define FT_CMAP_ENCODING_ID( x ) FT_CMAP( x )->charmap.encoding_id 144#define FT_CMAP_ENCODING( x ) FT_CMAP( x )->charmap.encoding 145#define FT_CMAP_FACE( x ) FT_CMAP( x )->charmap.face 146 147 148 /* class method definitions */ 149 typedef FT_Error 150 (*FT_CMap_InitFunc)( FT_CMap cmap, 151 FT_Pointer init_data ); 152 153 typedef void 154 (*FT_CMap_DoneFunc)( FT_CMap cmap ); 155 156 typedef FT_UInt 157 (*FT_CMap_CharIndexFunc)( FT_CMap cmap, 158 FT_UInt32 char_code ); 159 160 typedef FT_UInt 161 (*FT_CMap_CharNextFunc)( FT_CMap cmap, 162 FT_UInt32 *achar_code ); 163 164 typedef FT_UInt 165 (*FT_CMap_CharVarIndexFunc)( FT_CMap cmap, 166 FT_CMap unicode_cmap, 167 FT_UInt32 char_code, 168 FT_UInt32 variant_selector ); 169 170 typedef FT_Bool 171 (*FT_CMap_CharVarIsDefaultFunc)( FT_CMap cmap, 172 FT_UInt32 char_code, 173 FT_UInt32 variant_selector ); 174 175 typedef FT_UInt32 * 176 (*FT_CMap_VariantListFunc)( FT_CMap cmap, 177 FT_Memory mem ); 178 179 typedef FT_UInt32 * 180 (*FT_CMap_CharVariantListFunc)( FT_CMap cmap, 181 FT_Memory mem, 182 FT_UInt32 char_code ); 183 184 typedef FT_UInt32 * 185 (*FT_CMap_VariantCharListFunc)( FT_CMap cmap, 186 FT_Memory mem, 187 FT_UInt32 variant_selector ); 188 189 190 typedef struct FT_CMap_ClassRec_ 191 { 192 FT_ULong size; 193 FT_CMap_InitFunc init; 194 FT_CMap_DoneFunc done; 195 FT_CMap_CharIndexFunc char_index; 196 FT_CMap_CharNextFunc char_next; 197 198 /* Subsequent entries are special ones for format 14 -- the variant */ 199 /* selector subtable which behaves like no other */ 200 201 FT_CMap_CharVarIndexFunc char_var_index; 202 FT_CMap_CharVarIsDefaultFunc char_var_default; 203 FT_CMap_VariantListFunc variant_list; 204 FT_CMap_CharVariantListFunc charvariant_list; 205 FT_CMap_VariantCharListFunc variantchar_list; 206 207 } FT_CMap_ClassRec; 208 209#ifndef FT_CONFIG_OPTION_PIC 210 211#define FT_DECLARE_CMAP_CLASS(class_) \ 212 FT_CALLBACK_TABLE const FT_CMap_ClassRec class_; 213 214#define FT_DEFINE_CMAP_CLASS(class_, size_, init_, done_, char_index_, \ 215 char_next_, char_var_index_, char_var_default_, variant_list_, \ 216 charvariant_list_, variantchar_list_) \ 217 FT_CALLBACK_TABLE_DEF \ 218 const FT_CMap_ClassRec class_ = \ 219 { \ 220 size_, init_, done_, char_index_, char_next_, char_var_index_, \ 221 char_var_default_, variant_list_, charvariant_list_, variantchar_list_ \ 222 }; 223#else /* FT_CONFIG_OPTION_PIC */ 224 225#define FT_DECLARE_CMAP_CLASS(class_) \ 226 void FT_Init_Class_##class_( FT_Library library, FT_CMap_ClassRec* clazz); 227 228#define FT_DEFINE_CMAP_CLASS(class_, size_, init_, done_, char_index_, \ 229 char_next_, char_var_index_, char_var_default_, variant_list_, \ 230 charvariant_list_, variantchar_list_) \ 231 void \ 232 FT_Init_Class_##class_( FT_Library library, \ 233 FT_CMap_ClassRec* clazz) \ 234 { \ 235 FT_UNUSED(library); \ 236 clazz->size = size_; \ 237 clazz->init = init_; \ 238 clazz->done = done_; \ 239 clazz->char_index = char_index_; \ 240 clazz->char_next = char_next_; \ 241 clazz->char_var_index = char_var_index_; \ 242 clazz->char_var_default = char_var_default_; \ 243 clazz->variant_list = variant_list_; \ 244 clazz->charvariant_list = charvariant_list_; \ 245 clazz->variantchar_list = variantchar_list_; \ 246 } 247#endif /* FT_CONFIG_OPTION_PIC */ 248 249 /* create a new charmap and add it to charmap->face */ 250 FT_BASE( FT_Error ) 251 FT_CMap_New( FT_CMap_Class clazz, 252 FT_Pointer init_data, 253 FT_CharMap charmap, 254 FT_CMap *acmap ); 255 256 /* destroy a charmap and remove it from face's list */ 257 FT_BASE( void ) 258 FT_CMap_Done( FT_CMap cmap ); 259 260 261 /*************************************************************************/ 262 /* */ 263 /* <Struct> */ 264 /* FT_Face_InternalRec */ 265 /* */ 266 /* <Description> */ 267 /* This structure contains the internal fields of each FT_Face */ 268 /* object. These fields may change between different releases of */ 269 /* FreeType. */ 270 /* */ 271 /* <Fields> */ 272 /* max_points :: */ 273 /* The maximal number of points used to store the vectorial outline */ 274 /* of any glyph in this face. If this value cannot be known in */ 275 /* advance, or if the face isn't scalable, this should be set to 0. */ 276 /* Only relevant for scalable formats. */ 277 /* */ 278 /* max_contours :: */ 279 /* The maximal number of contours used to store the vectorial */ 280 /* outline of any glyph in this face. If this value cannot be */ 281 /* known in advance, or if the face isn't scalable, this should be */ 282 /* set to 0. Only relevant for scalable formats. */ 283 /* */ 284 /* transform_matrix :: */ 285 /* A 2x2 matrix of 16.16 coefficients used to transform glyph */ 286 /* outlines after they are loaded from the font. Only used by the */ 287 /* convenience functions. */ 288 /* */ 289 /* transform_delta :: */ 290 /* A translation vector used to transform glyph outlines after they */ 291 /* are loaded from the font. Only used by the convenience */ 292 /* functions. */ 293 /* */ 294 /* transform_flags :: */ 295 /* Some flags used to classify the transform. Only used by the */ 296 /* convenience functions. */ 297 /* */ 298 /* services :: */ 299 /* A cache for frequently used services. It should be only */ 300 /* accessed with the macro `FT_FACE_LOOKUP_SERVICE'. */ 301 /* */ 302 /* incremental_interface :: */ 303 /* If non-null, the interface through which glyph data and metrics */ 304 /* are loaded incrementally for faces that do not provide all of */ 305 /* this data when first opened. This field exists only if */ 306 /* @FT_CONFIG_OPTION_INCREMENTAL is defined. */ 307 /* */ 308 /* ignore_unpatented_hinter :: */ 309 /* This boolean flag instructs the glyph loader to ignore the */ 310 /* native font hinter, if one is found. This is exclusively used */ 311 /* in the case when the unpatented hinter is compiled within the */ 312 /* library. */ 313 /* */ 314 /* refcount :: */ 315 /* A counter initialized to~1 at the time an @FT_Face structure is */ 316 /* created. @FT_Reference_Face increments this counter, and */ 317 /* @FT_Done_Face only destroys a face if the counter is~1, */ 318 /* otherwise it simply decrements it. */ 319 /* */ 320 typedef struct FT_Face_InternalRec_ 321 { 322#ifdef FT_CONFIG_OPTION_OLD_INTERNALS 323 FT_UShort reserved1; 324 FT_Short reserved2; 325#endif 326 FT_Matrix transform_matrix; 327 FT_Vector transform_delta; 328 FT_Int transform_flags; 329 330 FT_ServiceCacheRec services; 331 332#ifdef FT_CONFIG_OPTION_INCREMENTAL 333 FT_Incremental_InterfaceRec* incremental_interface; 334#endif 335 336 FT_Bool ignore_unpatented_hinter; 337 FT_UInt refcount; 338 339 } FT_Face_InternalRec; 340 341 342 /*************************************************************************/ 343 /* */ 344 /* <Struct> */ 345 /* FT_Slot_InternalRec */ 346 /* */ 347 /* <Description> */ 348 /* This structure contains the internal fields of each FT_GlyphSlot */ 349 /* object. These fields may change between different releases of */ 350 /* FreeType. */ 351 /* */ 352 /* <Fields> */ 353 /* loader :: The glyph loader object used to load outlines */ 354 /* into the glyph slot. */ 355 /* */ 356 /* flags :: Possible values are zero or */ 357 /* FT_GLYPH_OWN_BITMAP. The latter indicates */ 358 /* that the FT_GlyphSlot structure owns the */ 359 /* bitmap buffer. */ 360 /* */ 361 /* glyph_transformed :: Boolean. Set to TRUE when the loaded glyph */ 362 /* must be transformed through a specific */ 363 /* font transformation. This is _not_ the same */ 364 /* as the face transform set through */ 365 /* FT_Set_Transform(). */ 366 /* */ 367 /* glyph_matrix :: The 2x2 matrix corresponding to the glyph */ 368 /* transformation, if necessary. */ 369 /* */ 370 /* glyph_delta :: The 2d translation vector corresponding to */ 371 /* the glyph transformation, if necessary. */ 372 /* */ 373 /* glyph_hints :: Format-specific glyph hints management. */ 374 /* */ 375 376#define FT_GLYPH_OWN_BITMAP 0x1 377 378 typedef struct FT_Slot_InternalRec_ 379 { 380 FT_GlyphLoader loader; 381 FT_UInt flags; 382 FT_Bool glyph_transformed; 383 FT_Matrix glyph_matrix; 384 FT_Vector glyph_delta; 385 void* glyph_hints; 386 387 } FT_GlyphSlot_InternalRec; 388 389 390#if 0 391 392 /*************************************************************************/ 393 /* */ 394 /* <Struct> */ 395 /* FT_Size_InternalRec */ 396 /* */ 397 /* <Description> */ 398 /* This structure contains the internal fields of each FT_Size */ 399 /* object. Currently, it's empty. */ 400 /* */ 401 /*************************************************************************/ 402 403 typedef struct FT_Size_InternalRec_ 404 { 405 /* empty */ 406 407 } FT_Size_InternalRec; 408 409#endif 410 411 412 /*************************************************************************/ 413 /*************************************************************************/ 414 /**** ****/ 415 /**** ****/ 416 /**** M O D U L E S ****/ 417 /**** ****/ 418 /**** ****/ 419 /*************************************************************************/ 420 /*************************************************************************/ 421 /*************************************************************************/ 422 423 424 /*************************************************************************/ 425 /* */ 426 /* <Struct> */ 427 /* FT_ModuleRec */ 428 /* */ 429 /* <Description> */ 430 /* A module object instance. */ 431 /* */ 432 /* <Fields> */ 433 /* clazz :: A pointer to the module's class. */ 434 /* */ 435 /* library :: A handle to the parent library object. */ 436 /* */ 437 /* memory :: A handle to the memory manager. */ 438 /* */ 439 typedef struct FT_ModuleRec_ 440 { 441 FT_Module_Class* clazz; 442 FT_Library library; 443 FT_Memory memory; 444 445 } FT_ModuleRec; 446 447 448 /* typecast an object to an FT_Module */ 449#define FT_MODULE( x ) ((FT_Module)( x )) 450#define FT_MODULE_CLASS( x ) FT_MODULE( x )->clazz 451#define FT_MODULE_LIBRARY( x ) FT_MODULE( x )->library 452#define FT_MODULE_MEMORY( x ) FT_MODULE( x )->memory 453 454 455#define FT_MODULE_IS_DRIVER( x ) ( FT_MODULE_CLASS( x )->module_flags & \ 456 FT_MODULE_FONT_DRIVER ) 457 458#define FT_MODULE_IS_RENDERER( x ) ( FT_MODULE_CLASS( x )->module_flags & \ 459 FT_MODULE_RENDERER ) 460 461#define FT_MODULE_IS_HINTER( x ) ( FT_MODULE_CLASS( x )->module_flags & \ 462 FT_MODULE_HINTER ) 463 464#define FT_MODULE_IS_STYLER( x ) ( FT_MODULE_CLASS( x )->module_flags & \ 465 FT_MODULE_STYLER ) 466 467#define FT_DRIVER_IS_SCALABLE( x ) ( FT_MODULE_CLASS( x )->module_flags & \ 468 FT_MODULE_DRIVER_SCALABLE ) 469 470#define FT_DRIVER_USES_OUTLINES( x ) !( FT_MODULE_CLASS( x )->module_flags & \ 471 FT_MODULE_DRIVER_NO_OUTLINES ) 472 473#define FT_DRIVER_HAS_HINTER( x ) ( FT_MODULE_CLASS( x )->module_flags & \ 474 FT_MODULE_DRIVER_HAS_HINTER ) 475 476 477 /*************************************************************************/ 478 /* */ 479 /* <Function> */ 480 /* FT_Get_Module_Interface */ 481 /* */ 482 /* <Description> */ 483 /* Finds a module and returns its specific interface as a typeless */ 484 /* pointer. */ 485 /* */ 486 /* <Input> */ 487 /* library :: A handle to the library object. */ 488 /* */ 489 /* module_name :: The module's name (as an ASCII string). */ 490 /* */ 491 /* <Return> */ 492 /* A module-specific interface if available, 0 otherwise. */ 493 /* */ 494 /* <Note> */ 495 /* You should better be familiar with FreeType internals to know */ 496 /* which module to look for, and what its interface is :-) */ 497 /* */ 498 FT_BASE( const void* ) 499 FT_Get_Module_Interface( FT_Library library, 500 const char* mod_name ); 501 502 FT_BASE( FT_Pointer ) 503 ft_module_get_service( FT_Module module, 504 const char* service_id ); 505 506 /* */ 507 508 509 /*************************************************************************/ 510 /*************************************************************************/ 511 /*************************************************************************/ 512 /**** ****/ 513 /**** ****/ 514 /**** FACE, SIZE & GLYPH SLOT OBJECTS ****/ 515 /**** ****/ 516 /**** ****/ 517 /*************************************************************************/ 518 /*************************************************************************/ 519 /*************************************************************************/ 520 521 /* a few macros used to perform easy typecasts with minimal brain damage */ 522 523#define FT_FACE( x ) ((FT_Face)(x)) 524#define FT_SIZE( x ) ((FT_Size)(x)) 525#define FT_SLOT( x ) ((FT_GlyphSlot)(x)) 526 527#define FT_FACE_DRIVER( x ) FT_FACE( x )->driver 528#define FT_FACE_LIBRARY( x ) FT_FACE_DRIVER( x )->root.library 529#define FT_FACE_MEMORY( x ) FT_FACE( x )->memory 530#define FT_FACE_STREAM( x ) FT_FACE( x )->stream 531 532#define FT_SIZE_FACE( x ) FT_SIZE( x )->face 533#define FT_SLOT_FACE( x ) FT_SLOT( x )->face 534 535#define FT_FACE_SLOT( x ) FT_FACE( x )->glyph 536#define FT_FACE_SIZE( x ) FT_FACE( x )->size 537 538 539 /*************************************************************************/ 540 /* */ 541 /* <Function> */ 542 /* FT_New_GlyphSlot */ 543 /* */ 544 /* <Description> */ 545 /* It is sometimes useful to have more than one glyph slot for a */ 546 /* given face object. This function is used to create additional */ 547 /* slots. All of them are automatically discarded when the face is */ 548 /* destroyed. */ 549 /* */ 550 /* <Input> */ 551 /* face :: A handle to a parent face object. */ 552 /* */ 553 /* <Output> */ 554 /* aslot :: A handle to a new glyph slot object. */ 555 /* */ 556 /* <Return> */ 557 /* FreeType error code. 0 means success. */ 558 /* */ 559 FT_BASE( FT_Error ) 560 FT_New_GlyphSlot( FT_Face face, 561 FT_GlyphSlot *aslot ); 562 563 564 /*************************************************************************/ 565 /* */ 566 /* <Function> */ 567 /* FT_Done_GlyphSlot */ 568 /* */ 569 /* <Description> */ 570 /* Destroys a given glyph slot. Remember however that all slots are */ 571 /* automatically destroyed with its parent. Using this function is */ 572 /* not always mandatory. */ 573 /* */ 574 /* <Input> */ 575 /* slot :: A handle to a target glyph slot. */ 576 /* */ 577 FT_BASE( void ) 578 FT_Done_GlyphSlot( FT_GlyphSlot slot ); 579 580 /* */ 581 582#define FT_REQUEST_WIDTH( req ) \ 583 ( (req)->horiResolution \ 584 ? (FT_Pos)( (req)->width * (req)->horiResolution + 36 ) / 72 \ 585 : (req)->width ) 586 587#define FT_REQUEST_HEIGHT( req ) \ 588 ( (req)->vertResolution \ 589 ? (FT_Pos)( (req)->height * (req)->vertResolution + 36 ) / 72 \ 590 : (req)->height ) 591 592 593 /* Set the metrics according to a bitmap strike. */ 594 FT_BASE( void ) 595 FT_Select_Metrics( FT_Face face, 596 FT_ULong strike_index ); 597 598 599 /* Set the metrics according to a size request. */ 600 FT_BASE( void ) 601 FT_Request_Metrics( FT_Face face, 602 FT_Size_Request req ); 603 604 605 /* Match a size request against `available_sizes'. */ 606 FT_BASE( FT_Error ) 607 FT_Match_Size( FT_Face face, 608 FT_Size_Request req, 609 FT_Bool ignore_width, 610 FT_ULong* size_index ); 611 612 613 /* Use the horizontal metrics to synthesize the vertical metrics. */ 614 /* If `advance' is zero, it is also synthesized. */ 615 FT_BASE( void ) 616 ft_synthesize_vertical_metrics( FT_Glyph_Metrics* metrics, 617 FT_Pos advance ); 618 619 620 /* Free the bitmap of a given glyphslot when needed (i.e., only when it */ 621 /* was allocated with ft_glyphslot_alloc_bitmap). */ 622 FT_BASE( void ) 623 ft_glyphslot_free_bitmap( FT_GlyphSlot slot ); 624 625 626 /* Allocate a new bitmap buffer in a glyph slot. */ 627 FT_BASE( FT_Error ) 628 ft_glyphslot_alloc_bitmap( FT_GlyphSlot slot, 629 FT_ULong size ); 630 631 632 /* Set the bitmap buffer in a glyph slot to a given pointer. The buffer */ 633 /* will not be freed by a later call to ft_glyphslot_free_bitmap. */ 634 FT_BASE( void ) 635 ft_glyphslot_set_bitmap( FT_GlyphSlot slot, 636 FT_Byte* buffer ); 637 638 639 /*************************************************************************/ 640 /*************************************************************************/ 641 /*************************************************************************/ 642 /**** ****/ 643 /**** ****/ 644 /**** R E N D E R E R S ****/ 645 /**** ****/ 646 /**** ****/ 647 /*************************************************************************/ 648 /*************************************************************************/ 649 /*************************************************************************/ 650 651 652#define FT_RENDERER( x ) ((FT_Renderer)( x )) 653#define FT_GLYPH( x ) ((FT_Glyph)( x )) 654#define FT_BITMAP_GLYPH( x ) ((FT_BitmapGlyph)( x )) 655#define FT_OUTLINE_GLYPH( x ) ((FT_OutlineGlyph)( x )) 656 657 658 typedef struct FT_RendererRec_ 659 { 660 FT_ModuleRec root; 661 FT_Renderer_Class* clazz; 662 FT_Glyph_Format glyph_format; 663 FT_Glyph_Class glyph_class; 664 665 FT_Raster raster; 666 FT_Raster_Render_Func raster_render; 667 FT_Renderer_RenderFunc render; 668 669 } FT_RendererRec; 670 671 672 /*************************************************************************/ 673 /*************************************************************************/ 674 /*************************************************************************/ 675 /**** ****/ 676 /**** ****/ 677 /**** F O N T D R I V E R S ****/ 678 /**** ****/ 679 /**** ****/ 680 /*************************************************************************/ 681 /*************************************************************************/ 682 /*************************************************************************/ 683 684 685 /* typecast a module into a driver easily */ 686#define FT_DRIVER( x ) ((FT_Driver)(x)) 687 688 /* typecast a module as a driver, and get its driver class */ 689#define FT_DRIVER_CLASS( x ) FT_DRIVER( x )->clazz 690 691 692 /*************************************************************************/ 693 /* */ 694 /* <Struct> */ 695 /* FT_DriverRec */ 696 /* */ 697 /* <Description> */ 698 /* The root font driver class. A font driver is responsible for */ 699 /* managing and loading font files of a given format. */ 700 /* */ 701 /* <Fields> */ 702 /* root :: Contains the fields of the root module class. */ 703 /* */ 704 /* clazz :: A pointer to the font driver's class. Note that */ 705 /* this is NOT root.clazz. `class' wasn't used */ 706 /* as it is a reserved word in C++. */ 707 /* */ 708 /* faces_list :: The list of faces currently opened by this */ 709 /* driver. */ 710 /* */ 711 /* glyph_loader :: The glyph loader for all faces managed by this */ 712 /* driver. This object isn't defined for unscalable */ 713 /* formats. */ 714 /* */ 715 typedef struct FT_DriverRec_ 716 { 717 FT_ModuleRec root; 718 FT_Driver_Class clazz; 719 FT_ListRec faces_list; 720 FT_GlyphLoader glyph_loader; 721 722 } FT_DriverRec; 723 724 725 /*************************************************************************/ 726 /*************************************************************************/ 727 /*************************************************************************/ 728 /**** ****/ 729 /**** ****/ 730 /**** L I B R A R I E S ****/ 731 /**** ****/ 732 /**** ****/ 733 /*************************************************************************/ 734 /*************************************************************************/ 735 /*************************************************************************/ 736 737 738 /* This hook is used by the TrueType debugger. It must be set to an */ 739 /* alternate truetype bytecode interpreter function. */ 740#define FT_DEBUG_HOOK_TRUETYPE 0 741 742 743 /* Set this debug hook to a non-null pointer to force unpatented hinting */ 744 /* for all faces when both TT_USE_BYTECODE_INTERPRETER and */ 745 /* TT_CONFIG_OPTION_UNPATENTED_HINTING are defined. This is only used */ 746 /* during debugging. */ 747#define FT_DEBUG_HOOK_UNPATENTED_HINTING 1 748 749 750 typedef void (*FT_Bitmap_LcdFilterFunc)( FT_Bitmap* bitmap, 751 FT_Render_Mode render_mode, 752 FT_Library library ); 753 754 755 /*************************************************************************/ 756 /* */ 757 /* <Struct> */ 758 /* FT_LibraryRec */ 759 /* */ 760 /* <Description> */ 761 /* The FreeType library class. This is the root of all FreeType */ 762 /* data. Use FT_New_Library() to create a library object, and */ 763 /* FT_Done_Library() to discard it and all child objects. */ 764 /* */ 765 /* <Fields> */ 766 /* memory :: The library's memory object. Manages memory */ 767 /* allocation. */ 768 /* */ 769 /* version_major :: The major version number of the library. */ 770 /* */ 771 /* version_minor :: The minor version number of the library. */ 772 /* */ 773 /* version_patch :: The current patch level of the library. */ 774 /* */ 775 /* num_modules :: The number of modules currently registered */ 776 /* within this library. This is set to 0 for new */ 777 /* libraries. New modules are added through the */ 778 /* FT_Add_Module() API function. */ 779 /* */ 780 /* modules :: A table used to store handles to the currently */ 781 /* registered modules. Note that each font driver */ 782 /* contains a list of its opened faces. */ 783 /* */ 784 /* renderers :: The list of renderers currently registered */ 785 /* within the library. */ 786 /* */ 787 /* cur_renderer :: The current outline renderer. This is a */ 788 /* shortcut used to avoid parsing the list on */ 789 /* each call to FT_Outline_Render(). It is a */ 790 /* handle to the current renderer for the */ 791 /* FT_GLYPH_FORMAT_OUTLINE format. */ 792 /* */ 793 /* auto_hinter :: XXX */ 794 /* */ 795 /* raster_pool :: The raster object's render pool. This can */ 796 /* ideally be changed dynamically at run-time. */ 797 /* */ 798 /* raster_pool_size :: The size of the render pool in bytes. */ 799 /* */ 800 /* debug_hooks :: XXX */ 801 /* */ 802 /* lcd_filter :: If subpixel rendering is activated, the */ 803 /* selected LCD filter mode. */ 804 /* */ 805 /* lcd_extra :: If subpixel rendering is activated, the number */ 806 /* of extra pixels needed for the LCD filter. */ 807 /* */ 808 /* lcd_weights :: If subpixel rendering is activated, the LCD */ 809 /* filter weights, if any. */ 810 /* */ 811 /* lcd_filter_func :: If subpixel rendering is activated, the LCD */ 812 /* filtering callback function. */ 813 /* */ 814 /* pic_container :: Contains global structs and tables, instead */ 815 /* of defining them globallly. */ 816 /* */ 817 /* refcount :: A counter initialized to~1 at the time an */ 818 /* @FT_Library structure is created. */ 819 /* @FT_Reference_Library increments this counter, */ 820 /* and @FT_Done_Library only destroys a library */ 821 /* if the counter is~1, otherwise it simply */ 822 /* decrements it. */ 823 /* */ 824 typedef struct FT_LibraryRec_ 825 { 826 FT_Memory memory; /* library's memory manager */ 827 828 FT_Int version_major; 829 FT_Int version_minor; 830 FT_Int version_patch; 831 832 FT_UInt num_modules; 833 FT_Module modules[FT_MAX_MODULES]; /* module objects */ 834 835 FT_ListRec renderers; /* list of renderers */ 836 FT_Renderer cur_renderer; /* current outline renderer */ 837 FT_Module auto_hinter; 838 839 FT_Byte* raster_pool; /* scan-line conversion */ 840 /* render pool */ 841 FT_ULong raster_pool_size; /* size of render pool in bytes */ 842 843 FT_DebugHook_Func debug_hooks[4]; 844 845#ifdef FT_CONFIG_OPTION_SUBPIXEL_RENDERING 846 FT_LcdFilter lcd_filter; 847 FT_Int lcd_extra; /* number of extra pixels */ 848 FT_Byte lcd_weights[7]; /* filter weights, if any */ 849 FT_Bitmap_LcdFilterFunc lcd_filter_func; /* filtering callback */ 850#endif 851 852#ifdef FT_CONFIG_OPTION_PIC 853 FT_PIC_Container pic_container; 854#endif 855 856 FT_UInt refcount; 857 858 } FT_LibraryRec; 859 860 861 FT_BASE( FT_Renderer ) 862 FT_Lookup_Renderer( FT_Library library, 863 FT_Glyph_Format format, 864 FT_ListNode* node ); 865 866 FT_BASE( FT_Error ) 867 FT_Render_Glyph_Internal( FT_Library library, 868 FT_GlyphSlot slot, 869 FT_Render_Mode render_mode ); 870 871 typedef const char* 872 (*FT_Face_GetPostscriptNameFunc)( FT_Face face ); 873 874 typedef FT_Error 875 (*FT_Face_GetGlyphNameFunc)( FT_Face face, 876 FT_UInt glyph_index, 877 FT_Pointer buffer, 878 FT_UInt buffer_max ); 879 880 typedef FT_UInt 881 (*FT_Face_GetGlyphNameIndexFunc)( FT_Face face, 882 FT_String* glyph_name ); 883 884 885#ifndef FT_CONFIG_OPTION_NO_DEFAULT_SYSTEM 886 887 /*************************************************************************/ 888 /* */ 889 /* <Function> */ 890 /* FT_New_Memory */ 891 /* */ 892 /* <Description> */ 893 /* Creates a new memory object. */ 894 /* */ 895 /* <Return> */ 896 /* A pointer to the new memory object. 0 in case of error. */ 897 /* */ 898 FT_BASE( FT_Memory ) 899 FT_New_Memory( void ); 900 901 902 /*************************************************************************/ 903 /* */ 904 /* <Function> */ 905 /* FT_Done_Memory */ 906 /* */ 907 /* <Description> */ 908 /* Discards memory manager. */ 909 /* */ 910 /* <Input> */ 911 /* memory :: A handle to the memory manager. */ 912 /* */ 913 FT_BASE( void ) 914 FT_Done_Memory( FT_Memory memory ); 915 916#endif /* !FT_CONFIG_OPTION_NO_DEFAULT_SYSTEM */ 917 918 919 /* Define default raster's interface. The default raster is located in */ 920 /* `src/base/ftraster.c'. */ 921 /* */ 922 /* Client applications can register new rasters through the */ 923 /* FT_Set_Raster() API. */ 924 925#ifndef FT_NO_DEFAULT_RASTER 926 FT_EXPORT_VAR( FT_Raster_Funcs ) ft_default_raster; 927#endif 928 929 /*************************************************************************/ 930 /*************************************************************************/ 931 /*************************************************************************/ 932 /**** ****/ 933 /**** ****/ 934 /**** PIC-Support Macros for ftimage.h ****/ 935 /**** ****/ 936 /**** ****/ 937 /*************************************************************************/ 938 /*************************************************************************/ 939 /*************************************************************************/ 940 941 942 /*************************************************************************/ 943 /* */ 944 /* <Macro> */ 945 /* FT_DEFINE_OUTLINE_FUNCS */ 946 /* */ 947 /* <Description> */ 948 /* Used to initialize an instance of FT_Outline_Funcs struct. */ 949 /* When FT_CONFIG_OPTION_PIC is defined an init funtion will need to */ 950 /* called with a pre-allocated stracture to be filled. */ 951 /* When FT_CONFIG_OPTION_PIC is not defined the struct will be */ 952 /* allocated in the global scope (or the scope where the macro */ 953 /* is used). */ 954 /* */ 955#ifndef FT_CONFIG_OPTION_PIC 956 957#define FT_DEFINE_OUTLINE_FUNCS(class_, move_to_, line_to_, conic_to_, \ 958 cubic_to_, shift_, delta_) \ 959 static const FT_Outline_Funcs class_ = \ 960 { \ 961 move_to_, line_to_, conic_to_, cubic_to_, shift_, delta_ \ 962 }; 963 964#else /* FT_CONFIG_OPTION_PIC */ 965 966#define FT_DEFINE_OUTLINE_FUNCS(class_, move_to_, line_to_, conic_to_, \ 967 cubic_to_, shift_, delta_) \ 968 static FT_Error \ 969 Init_Class_##class_( FT_Outline_Funcs* clazz ) \ 970 { \ 971 clazz->move_to = move_to_; \ 972 clazz->line_to = line_to_; \ 973 clazz->conic_to = conic_to_; \ 974 clazz->cubic_to = cubic_to_; \ 975 clazz->shift = shift_; …
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