1 /***************************************************************************/ 2 /* */ 3 /* ftoption.h */ 4 /* */ 5 /* User-selectable configuration macros (specification only). */ 6 /* */ 7 /* Copyright 1996-2013 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 #ifndef __FTOPTION_H__ 20 #define __FTOPTION_H__ 21 22 23 #include <ft2build.h> 24 25 26 FT_BEGIN_HEADER 27 28 /*************************************************************************/ 29 /* */ 30 /* USER-SELECTABLE CONFIGURATION MACROS */ 31 /* */ 32 /* This file contains the default configuration macro definitions for */ 33 /* a standard build of the FreeType library. There are three ways to */ 34 /* use this file to build project-specific versions of the library: */ 35 /* */ 36 /* - You can modify this file by hand, but this is not recommended in */ 37 /* cases where you would like to build several versions of the */ 38 /* library from a single source directory. */ 39 /* */ 40 /* - You can put a copy of this file in your build directory, more */ 41 /* precisely in `$BUILD/config/ftoption.h', where `$BUILD' is the */ 42 /* name of a directory that is included _before_ the FreeType include */ 43 /* path during compilation. */ 44 /* */ 45 /* The default FreeType Makefiles and Jamfiles use the build */ 46 /* directory `builds/<system>' by default, but you can easily change */ 47 /* that for your own projects. */ 48 /* */ 49 /* - Copy the file <ft2build.h> to `$BUILD/ft2build.h' and modify it */ 50 /* slightly to pre-define the macro FT_CONFIG_OPTIONS_H used to */ 51 /* locate this file during the build. For example, */ 52 /* */ 53 /* #define FT_CONFIG_OPTIONS_H <myftoptions.h> */ 54 /* #include <config/ftheader.h> */ 55 /* */ 56 /* will use `$BUILD/myftoptions.h' instead of this file for macro */ 57 /* definitions. */ 58 /* */ 59 /* Note also that you can similarly pre-define the macro */ 60 /* FT_CONFIG_MODULES_H used to locate the file listing of the modules */ 61 /* that are statically linked to the library at compile time. By */ 62 /* default, this file is <config/ftmodule.h>. */ 63 /* */ 64 /* We highly recommend using the third method whenever possible. */ 65 /* */ 66 /*************************************************************************/ 67 68 69 /*************************************************************************/ 70 /*************************************************************************/ 71 /**** ****/ 72 /**** G E N E R A L F R E E T Y P E 2 C O N F I G U R A T I O N ****/ 73 /**** ****/ 74 /*************************************************************************/ 75 /*************************************************************************/ 76 77 78 /*************************************************************************/ 79 /* */ 80 /* Uncomment the line below if you want to activate sub-pixel rendering */ 81 /* (a.k.a. LCD rendering, or ClearType) in this build of the library. */ 82 /* */ 83 /* Note that this feature is covered by several Microsoft patents */ 84 /* and should not be activated in any default build of the library. */ 85 /* */ 86 /* This macro has no impact on the FreeType API, only on its */ 87 /* _implementation_. For example, using FT_RENDER_MODE_LCD when calling */ 88 /* FT_Render_Glyph still generates a bitmap that is 3 times wider than */ 89 /* the original size in case this macro isn't defined; however, each */ 90 /* triplet of subpixels has R=G=B. */ 91 /* */ 92 /* This is done to allow FreeType clients to run unmodified, forcing */ 93 /* them to display normal gray-level anti-aliased glyphs. */ 94 /* */ 95 /* #define FT_CONFIG_OPTION_SUBPIXEL_RENDERING */ 96 97 98 /*************************************************************************/ 99 /* */ 100 /* Many compilers provide a non-ANSI 64-bit data type that can be used */ 101 /* by FreeType to speed up some computations. However, this will create */ 102 /* some problems when compiling the library in strict ANSI mode. */ 103 /* */ 104 /* For this reason, the use of 64-bit integers is normally disabled when */ 105 /* the __STDC__ macro is defined. You can however disable this by */ 106 /* defining the macro FT_CONFIG_OPTION_FORCE_INT64 here. */ 107 /* */ 108 /* For most compilers, this will only create compilation warnings when */ 109 /* building the library. */ 110 /* */ 111 /* ObNote: The compiler-specific 64-bit integers are detected in the */ 112 /* file `ftconfig.h' either statically or through the */ 113 /* `configure' script on supported platforms. */ 114 /* */ 115 #undef FT_CONFIG_OPTION_FORCE_INT64 116 117 118 /*************************************************************************/ 119 /* */ 120 /* If this macro is defined, do not try to use an assembler version of */ 121 /* performance-critical functions (e.g. FT_MulFix). You should only do */ 122 /* that to verify that the assembler function works properly, or to */ 123 /* execute benchmark tests of the various implementations. */ 124 /* #define FT_CONFIG_OPTION_NO_ASSEMBLER */ 125 126 127 /*************************************************************************/ 128 /* */ 129 /* If this macro is defined, try to use an inlined assembler version of */ 130 /* the `FT_MulFix' function, which is a `hotspot' when loading and */ 131 /* hinting glyphs, and which should be executed as fast as possible. */ 132 /* */ 133 /* Note that if your compiler or CPU is not supported, this will default */ 134 /* to the standard and portable implementation found in `ftcalc.c'. */ 135 /* */ 136 #define FT_CONFIG_OPTION_INLINE_MULFIX 137 138 139 /*************************************************************************/ 140 /* */ 141 /* LZW-compressed file support. */ 142 /* */ 143 /* FreeType now handles font files that have been compressed with the */ 144 /* `compress' program. This is mostly used to parse many of the PCF */ 145 /* files that come with various X11 distributions. The implementation */ 146 /* uses NetBSD's `zopen' to partially uncompress the file on the fly */ 147 /* (see src/lzw/ftgzip.c). */ 148 /* */ 149 /* Define this macro if you want to enable this `feature'. */ 150 /* */ 151 #define FT_CONFIG_OPTION_USE_LZW 152 153 154 /*************************************************************************/ 155 /* */ 156 /* Gzip-compressed file support. */ 157 /* */ 158 /* FreeType now handles font files that have been compressed with the */ 159 /* `gzip' program. This is mostly used to parse many of the PCF files */ 160 /* that come with XFree86. The implementation uses `zlib' to */ 161 /* partially uncompress the file on the fly (see src/gzip/ftgzip.c). */ 162 /* */ 163 /* Define this macro if you want to enable this `feature'. See also */ 164 /* the macro FT_CONFIG_OPTION_SYSTEM_ZLIB below. */ 165 /* */ 166 #define FT_CONFIG_OPTION_USE_ZLIB 167 168 169 /*************************************************************************/ 170 /* */ 171 /* ZLib library selection */ 172 /* */ 173 /* This macro is only used when FT_CONFIG_OPTION_USE_ZLIB is defined. */ 174 /* It allows FreeType's `ftgzip' component to link to the system's */ 175 /* installation of the ZLib library. This is useful on systems like */ 176 /* Unix or VMS where it generally is already available. */ 177 /* */ 178 /* If you let it undefined, the component will use its own copy */ 179 /* of the zlib sources instead. These have been modified to be */ 180 /* included directly within the component and *not* export external */ 181 /* function names. This allows you to link any program with FreeType */ 182 /* _and_ ZLib without linking conflicts. */ 183 /* */ 184 /* Do not #undef this macro here since the build system might define */ 185 /* it for certain configurations only. */ 186 /* */ 187 /* #define FT_CONFIG_OPTION_SYSTEM_ZLIB */ 188 189 190 /*************************************************************************/ 191 /* */ 192 /* Bzip2-compressed file support. */ 193 /* */ 194 /* FreeType now handles font files that have been compressed with the */ 195 /* `bzip2' program. This is mostly used to parse many of the PCF */ 196 /* files that come with XFree86. The implementation uses `libbz2' to */ 197 /* partially uncompress the file on the fly (see src/bzip2/ftbzip2.c). */ 198 /* Contrary to gzip, bzip2 currently is not included and need to use */ 199 /* the system available bzip2 implementation. */ 200 /* */ 201 /* Define this macro if you want to enable this `feature'. */ 202 /* */ 203 /* #define FT_CONFIG_OPTION_USE_BZIP2 */ 204 205 206 /*************************************************************************/ 207 /* */ 208 /* Define to disable the use of file stream functions and types, FILE, */ 209 /* fopen() etc. Enables the use of smaller system libraries on embedded */ 210 /* systems that have multiple system libraries, some with or without */ 211 /* file stream support, in the cases where file stream support is not */ 212 /* necessary such as memory loading of font files. */ 213 /* */ 214 /* #define FT_CONFIG_OPTION_DISABLE_STREAM_SUPPORT */ 215 216 217 /*************************************************************************/ 218 /* */ 219 /* PNG bitmap support. */ 220 /* */ 221 /* FreeType now handles loading color bitmap glyphs in the PNG format. */ 222 /* This requires help from the external libpng library. Uncompressed */ 223 /* color bitmaps do not need any external libraries and will be */ 224 /* supported regardless of this configuration. */ 225 /* */ 226 /* Define this macro if you want to enable this `feature'. */ 227 /* */ 228 #define FT_CONFIG_OPTION_USE_PNG 229 230 231 /*************************************************************************/ 232 /* */ 233 /* HarfBuzz support. */ 234 /* */ 235 /* FreeType uses the HarfBuzz library to improve auto-hinting of */ 236 /* OpenType fonts. If available, many glyphs not directly addressable */ 237 /* by a font's character map will be hinted also. */ 238 /* */ 239 /* Define this macro if you want to enable this `feature'. */ 240 /* */ 241 /* #define FT_CONFIG_OPTION_USE_HARFBUZZ */ 242 243 244 /*************************************************************************/ 245 /* */ 246 /* DLL export compilation */ 247 /* */ 248 /* When compiling FreeType as a DLL, some systems/compilers need a */ 249 /* special keyword in front OR after the return type of function */ 250 /* declarations. */ 251 /* */ 252 /* Two macros are used within the FreeType source code to define */ 253 /* exported library functions: FT_EXPORT and FT_EXPORT_DEF. */ 254 /* */ 255 /* FT_EXPORT( return_type ) */ 256 /* */ 257 /* is used in a function declaration, as in */ 258 /* */ 259 /* FT_EXPORT( FT_Error ) */ 260 /* FT_Init_FreeType( FT_Library* alibrary ); */ 261 /* */ 262 /* */ 263 /* FT_EXPORT_DEF( return_type ) */ 264 /* */ 265 /* is used in a function definition, as in */ 266 /* */ 267 /* FT_EXPORT_DEF( FT_Error ) */ 268 /* FT_Init_FreeType( FT_Library* alibrary ) */ 269 /* { */ 270 /* ... some code ... */ 271 /* return FT_Err_Ok; */ 272 /* } */ 273 /* */ 274 /* You can provide your own implementation of FT_EXPORT and */ 275 /* FT_EXPORT_DEF here if you want. If you leave them undefined, they */ 276 /* will be later automatically defined as `extern return_type' to */ 277 /* allow normal compilation. */ 278 /* */ 279 /* Do not #undef these macros here since the build system might define */ 280 /* them for certain configurations only. */ 281 /* */ 282 /* #define FT_EXPORT(x) extern x */ 283 /* #define FT_EXPORT_DEF(x) x */ 284 285 286 /*************************************************************************/ 287 /* */ 288 /* Glyph Postscript Names handling */ 289 /* */ 290 /* By default, FreeType 2 is compiled with the `psnames' module. This */ 291 /* module is in charge of converting a glyph name string into a */ 292 /* Unicode value, or return a Macintosh standard glyph name for the */ 293 /* use with the TrueType `post' table. */ 294 /* */ 295 /* Undefine this macro if you do not want `psnames' compiled in your */ 296 /* build of FreeType. This has the following effects: */ 297 /* */ 298 /* - The TrueType driver will provide its own set of glyph names, */ 299 /* if you build it to support postscript names in the TrueType */ 300 /* `post' table. */ 301 /* */ 302 /* - The Type 1 driver will not be able to synthesize a Unicode */ 303 /* charmap out of the glyphs found in the fonts. */ 304 /* */ 305 /* You would normally undefine this configuration macro when building */ 306 /* a version of FreeType that doesn't contain a Type 1 or CFF driver. */ 307 /* */ 308 #define FT_CONFIG_OPTION_POSTSCRIPT_NAMES 309 310 311 /*************************************************************************/ 312 /* */ 313 /* Postscript Names to Unicode Values support */ 314 /* */ 315 /* By default, FreeType 2 is built with the `PSNames' module compiled */ 316 /* in. Among other things, the module is used to convert a glyph name */ 317 /* into a Unicode value. This is especially useful in order to */ 318 /* synthesize on the fly a Unicode charmap from the CFF/Type 1 driver */ 319 /* through a big table named the `Adobe Glyph List' (AGL). */ 320 /* */ 321 /* Undefine this macro if you do not want the Adobe Glyph List */ 322 /* compiled in your `PSNames' module. The Type 1 driver will not be */ 323 /* able to synthesize a Unicode charmap out of the glyphs found in the */ 324 /* fonts. */ 325 /* */ 326 #define FT_CONFIG_OPTION_ADOBE_GLYPH_LIST 327 328 329 /*************************************************************************/ 330 /* */ 331 /* Support for Mac fonts */ 332 /* */ 333 /* Define this macro if you want support for outline fonts in Mac */ 334 /* format (mac dfont, mac resource, macbinary containing a mac */ 335 /* resource) on non-Mac platforms. */ 336 /* */ 337 /* Note that the `FOND' resource isn't checked. */ 338 /* */ 339 #define FT_CONFIG_OPTION_MAC_FONTS 340 341 342 /*************************************************************************/ 343 /* */ 344 /* Guessing methods to access embedded resource forks */ 345 /* */ 346 /* Enable extra Mac fonts support on non-Mac platforms (e.g. */ 347 /* GNU/Linux). */ 348 /* */ 349 /* Resource forks which include fonts data are stored sometimes in */ 350 /* locations which users or developers don't expected. In some cases, */ 351 /* resource forks start with some offset from the head of a file. In */ 352 /* other cases, the actual resource fork is stored in file different */ 353 /* from what the user specifies. If this option is activated, */ 354 /* FreeType tries to guess whether such offsets or different file */ 355 /* names must be used. */ 356 /* */ 357 /* Note that normal, direct access of resource forks is controlled via */ 358 /* the FT_CONFIG_OPTION_MAC_FONTS option. */ 359 /* */ 360 #ifdef FT_CONFIG_OPTION_MAC_FONTS 361 #define FT_CONFIG_OPTION_GUESSING_EMBEDDED_RFORK 362 #endif 363 364 365 /*************************************************************************/ 366 /* */ 367 /* Allow the use of FT_Incremental_Interface to load typefaces that */ 368 /* contain no glyph data, but supply it via a callback function. */ 369 /* This is required by clients supporting document formats which */ 370 /* supply font data incrementally as the document is parsed, such */ 371 /* as the Ghostscript interpreter for the PostScript language. */ 372 /* */ 373 /* #define FT_CONFIG_OPTION_INCREMENTAL */ 374 375 376 /*************************************************************************/ 377 /* */ 378 /* The size in bytes of the render pool used by the scan-line converter */ 379 /* to do all of its work. */ 380 /* */ 381 /* This must be greater than 4KByte if you use FreeType to rasterize */ 382 /* glyphs; otherwise, you may set it to zero to avoid unnecessary */ 383 /* allocation of the render pool. */ 384 /* */ 385 #define FT_RENDER_POOL_SIZE 16384L 386 387 388 /*************************************************************************/ 389 /* */ 390 /* FT_MAX_MODULES */ 391 /* */ 392 /* The maximum number of modules that can be registered in a single */ 393 /* FreeType library object. 32 is the default. */ 394 /* */ 395 #define FT_MAX_MODULES 32 396 397 398 /*************************************************************************/ 399 /* */ 400 /* Debug level */ 401 /* */ 402 /* FreeType can be compiled in debug or trace mode. In debug mode, */ 403 /* errors are reported through the `ftdebug' component. In trace */ 404 /* mode, additional messages are sent to the standard output during */ 405 /* execution. */ 406 /* */ 407 /* Define FT_DEBUG_LEVEL_ERROR to build the library in debug mode. */ 408 /* Define FT_DEBUG_LEVEL_TRACE to build it in trace mode. */ 409 /* */ 410 /* Don't define any of these macros to compile in `release' mode! */ 411 /* */ 412 /* Do not #undef these macros here since the build system might define */ 413 /* them for certain configurations only. */ 414 /* */ 415 /* #define FT_DEBUG_LEVEL_ERROR */ 416 /* #define FT_DEBUG_LEVEL_TRACE */ 417 418 419 /*************************************************************************/ 420 /* */ 421 /* Autofitter debugging */ 422 /* */ 423 /* If FT_DEBUG_AUTOFIT is defined, FreeType provides some means to */ 424 /* control the autofitter behaviour for debugging purposes with global */ 425 /* boolean variables (consequently, you should *never* enable this */ 426 /* while compiling in `release' mode): */ 427 /* */ 428 /* _af_debug_disable_horz_hints */ 429 /* _af_debug_disable_vert_hints */ 430 /* _af_debug_disable_blue_hints */ 431 /* */ 432 /* Additionally, the following functions provide dumps of various */ 433 /* internal autofit structures to stdout (using `printf'): */ 434 /* */ 435 /* af_glyph_hints_dump_points */ 436 /* af_glyph_hints_dump_segments */ 437 /* af_glyph_hints_dump_edges */ 438 /* */ 439 /* As an argument, they use another global variable: */ 440 /* */ 441 /* _af_debug_hints */ 442 /* */ 443 /* Please have a look at the `ftgrid' demo program to see how those */ 444 /* variables and macros should be used. */ 445 /* */ 446 /* Do not #undef these macros here since the build system might define */ 447 /* them for certain configurations only. */ 448 /* */ 449 /* #define FT_DEBUG_AUTOFIT */ 450 451 452 /*************************************************************************/ 453 /* */ 454 /* Memory Debugging */ 455 /* */ 456 /* FreeType now comes with an integrated memory debugger that is */ 457 /* capable of detecting simple errors like memory leaks or double */ 458 /* deletes. To compile it within your build of the library, you */ 459 /* should define FT_DEBUG_MEMORY here. */ 460 /* */ 461 /* Note that the memory debugger is only activated at runtime when */ 462 /* when the _environment_ variable `FT2_DEBUG_MEMORY' is defined also! */ 463 /* */ 464 /* Do not #undef this macro here since the build system might define */ 465 /* it for certain configurations only. */ 466 /* */ 467 /* #define FT_DEBUG_MEMORY */ 468 469 470 /*************************************************************************/ 471 /* */ 472 /* Module errors */ 473 /* */ 474 /* If this macro is set (which is _not_ the default), the higher byte */ 475 /* of an error code gives the module in which the error has occurred, */ 476 /* while the lower byte is the real error code. */ 477 /* */ 478 /* Setting this macro makes sense for debugging purposes only, since */ 479 /* it would break source compatibility of certain programs that use */ 480 /* FreeType 2. */ 481 /* */ 482 /* More details can be found in the files ftmoderr.h and fterrors.h. */ 483 /* */ 484 #undef FT_CONFIG_OPTION_USE_MODULE_ERRORS 485 486 487 /*************************************************************************/ 488 /* */ 489 /* Position Independent Code */ 490 /* */ 491 /* If this macro is set (which is _not_ the default), FreeType2 will */ 492 /* avoid creating constants that require address fixups. Instead the */ 493 /* constants will be moved into a struct and additional intialization */ 494 /* code will be used. */ 495 /* */ 496 /* Setting this macro is needed for systems that prohibit address */ 497 /* fixups, such as BREW. */ 498 /* */ 499 /* #define FT_CONFIG_OPTION_PIC */ 500 501 502 /*************************************************************************/ 503 /*************************************************************************/ 504 /**** ****/ 505 /**** S F N T D R I V E R C O N F I G U R A T I O N ****/ 506 /**** ****/ 507 /*************************************************************************/ 508 /*************************************************************************/ 509 510 511 /*************************************************************************/ 512 /* */ 513 /* Define TT_CONFIG_OPTION_EMBEDDED_BITMAPS if you want to support */ 514 /* embedded bitmaps in all formats using the SFNT module (namely */ 515 /* TrueType & OpenType). */ 516 /* */ 517 #define TT_CONFIG_OPTION_EMBEDDED_BITMAPS 518 519 520 /*************************************************************************/ 521 /* */ 522 /* Define TT_CONFIG_OPTION_POSTSCRIPT_NAMES if you want to be able to */ 523 /* load and enumerate the glyph Postscript names in a TrueType or */ 524 /* OpenType file. */ 525 /* */ 526 /* Note that when you do not compile the `PSNames' module by undefining */ 527 /* the above FT_CONFIG_OPTION_POSTSCRIPT_NAMES, the `sfnt' module will */ 528 /* contain additional code used to read the PS Names table from a font. */ 529 /* */ 530 /* (By default, the module uses `PSNames' to extract glyph names.) */ 531 /* */ 532 #define TT_CONFIG_OPTION_POSTSCRIPT_NAMES 533 534 535 /*************************************************************************/ 536 /* */ 537 /* Define TT_CONFIG_OPTION_SFNT_NAMES if your applications need to */ 538 /* access the internal name table in a SFNT-based format like TrueType */ 539 /* or OpenType. The name table contains various strings used to */ 540 /* describe the font, like family name, copyright, version, etc. It */ 541 /* does not contain any glyph name though. */ 542 /* */ 543 /* Accessing SFNT names is done through the functions declared in */ 544 /* `ftsnames.h'. */ 545 /* */ 546 #define TT_CONFIG_OPTION_SFNT_NAMES 547 548 549 /*************************************************************************/ 550 /* */ 551 /* TrueType CMap support */ 552 /* */ 553 /* Here you can fine-tune which TrueType CMap table format shall be */ 554 /* supported. */ 555 #define TT_CONFIG_CMAP_FORMAT_0 556 #define TT_CONFIG_CMAP_FORMAT_2 557 #define TT_CONFIG_CMAP_FORMAT_4 558 #define TT_CONFIG_CMAP_FORMAT_6 559 #define TT_CONFIG_CMAP_FORMAT_8 560 #define TT_CONFIG_CMAP_FORMAT_10 561 #define TT_CONFIG_CMAP_FORMAT_12 562 #define TT_CONFIG_CMAP_FORMAT_13 563 #define TT_CONFIG_CMAP_FORMAT_14 564 565 566 /*************************************************************************/ 567 /*************************************************************************/ 568 /**** ****/ 569 /**** T R U E T Y P E D R I V E R C O N F I G U R A T I O N ****/ 570 /**** ****/ 571 /*************************************************************************/ 572 /*************************************************************************/ 573 574 /*************************************************************************/ 575 /* */ 576 /* Define TT_CONFIG_OPTION_BYTECODE_INTERPRETER if you want to compile */ 577 /* a bytecode interpreter in the TrueType driver. */ 578 /* */ 579 /* By undefining this, you will only compile the code necessary to load */ 580 /* TrueType glyphs without hinting. */ 581 /* */ 582 /* Do not #undef this macro here, since the build system might */ 583 /* define it for certain configurations only. */ 584 /* */ 585 #define TT_CONFIG_OPTION_BYTECODE_INTERPRETER 586 587 588 /*************************************************************************/ 589 /* */ 590 /* Define TT_CONFIG_OPTION_SUBPIXEL_HINTING if you want to compile */ 591 /* EXPERIMENTAL subpixel hinting support into the TrueType driver. This */ 592 /* replaces the native TrueType hinting mechanism when anything but */ 593 /* FT_RENDER_MODE_MONO is requested. */ 594 /* */ 595 /* Enabling this causes the TrueType driver to ignore instructions under */ 596 /* certain conditions. This is done in accordance with the guide here, */ 597 /* with some minor differences: */ 598 /* */ 599 /* http://www.microsoft.com/typography/cleartype/truetypecleartype.aspx */ 600 /* */ 601 /* By undefining this, you only compile the code necessary to hint */ 602 /* TrueType glyphs with native TT hinting. */ 603 /* */ 604 /* This option requires TT_CONFIG_OPTION_BYTECODE_INTERPRETER to be */ 605 /* defined. */ 606 /* */ 607 /* #define TT_CONFIG_OPTION_SUBPIXEL_HINTING */ 608 609 610 /*************************************************************************/ 611 /* */ 612 /* If you define TT_CONFIG_OPTION_UNPATENTED_HINTING, a special version */ 613 /* of the TrueType bytecode interpreter is used that doesn't implement */ 614 /* any of the patented opcodes and algorithms. The patents related to */ 615 /* TrueType hinting have expired worldwide since May 2010; this option */ 616 /* is now deprecated. */ 617 /* */ 618 /* Note that the TT_CONFIG_OPTION_UNPATENTED_HINTING macro is *ignored* */ 619 /* if you define TT_CONFIG_OPTION_BYTECODE_INTERPRETER; in other words, */ 620 /* either define TT_CONFIG_OPTION_BYTECODE_INTERPRETER or */ 621 /* TT_CONFIG_OPTION_UNPATENTED_HINTING but not both at the same time. */ 622 /* */ 623 /* This macro is only useful for a small number of font files (mostly */ 624 /* for Asian scripts) that require bytecode interpretation to properly */ 625 /* load glyphs. For all other fonts, this produces unpleasant results, */ 626 /* thus the unpatented interpreter is never used to load glyphs from */ 627 /* TrueType fonts unless one of the following two options is used. */ 628 /* */ 629 /* - The unpatented interpreter is explicitly activated by the user */ 630 /* through the FT_PARAM_TAG_UNPATENTED_HINTING parameter tag */ 631 /* when opening the FT_Face. */ 632 /* */ 633 /* - FreeType detects that the FT_Face corresponds to one of the */ 634 /* `trick' fonts (e.g., `Mingliu') it knows about. The font engine */ 635 /* contains a hard-coded list of font names and other matching */ 636 /* parameters (see function `tt_face_init' in file */ 637 /* `src/truetype/ttobjs.c'). */ 638 /* */ 639 /* Here a sample code snippet for using FT_PARAM_TAG_UNPATENTED_HINTING. */ 640 /* */ 641 /* { */ 642 /* FT_Parameter parameter; */ 643 /* FT_Open_Args open_args; */ 644 /* */ 645 /* */ 646 /* parameter.tag = FT_PARAM_TAG_UNPATENTED_HINTING; */ 647 /* */ 648 /* open_args.flags = FT_OPEN_PATHNAME | FT_OPEN_PARAMS; */ 649 /* open_args.pathname = my_font_pathname; */ 650 /* open_args.num_params = 1; */ 651 /* open_args.params = ¶meter; */ 652 /* */ 653 /* error = FT_Open_Face( library, &open_args, index, &face ); */ 654 /* ... */ 655 /* } */ 656 /* */ 657 /* #define TT_CONFIG_OPTION_UNPATENTED_HINTING */ 658 659 660 /*************************************************************************/ 661 /* */ 662 /* Define TT_CONFIG_OPTION_INTERPRETER_SWITCH to compile the TrueType */ 663 /* bytecode interpreter with a huge switch statement, rather than a call */ 664 /* table. This results in smaller and faster code for a number of */ 665 /* architectures. */ 666 /* */ 667 /* Note however that on some compiler/processor combinations, undefining */ 668 /* this macro will generate faster, though larger, code. */ 669 /* */ 670 #define TT_CONFIG_OPTION_INTERPRETER_SWITCH 671 672 673 /*************************************************************************/ 674 /* */ 675 /* Define TT_CONFIG_OPTION_COMPONENT_OFFSET_SCALED to compile the */ 676 /* TrueType glyph loader to use Apple's definition of how to handle */ 677 /* component offsets in composite glyphs. */ 678 /* */ 679 /* Apple and MS disagree on the default behavior of component offsets */ 680 /* in composites. Apple says that they should be scaled by the scaling */ 681 /* factors in the transformation matrix (roughly, it's more complex) */ 682 /* while MS says they should not. OpenType defines two bits in the */ 683 /* composite flags array which can be used to disambiguate, but old */ 684 /* fonts will not have them. */ 685 /* */ 686 /* http://www.microsoft.com/typography/otspec/glyf.htm */ 687 /* http://fonts.apple.com/TTRefMan/RM06/Chap6glyf.html */ 688 /* */ 689 #undef TT_CONFIG_OPTION_COMPONENT_OFFSET_SCALED 690 691 692 /*************************************************************************/ 693 /* */ 694 /* Define TT_CONFIG_OPTION_GX_VAR_SUPPORT if you want to include */ 695 /* support for Apple's distortable font technology (fvar, gvar, cvar, */ 696 /* and avar tables). This has many similarities to Type 1 Multiple */ 697 /* Masters support. */ 698 /* */ 699 #define TT_CONFIG_OPTION_GX_VAR_SUPPORT 700 701 702 /*************************************************************************/ 703 /* */ 704 /* Define TT_CONFIG_OPTION_BDF if you want to include support for */ 705 /* an embedded `BDF ' table within SFNT-based bitmap formats. */ 706 /* */ 707 #define TT_CONFIG_OPTION_BDF 708 709 710 /*************************************************************************/ 711 /*************************************************************************/ 712 /**** ****/ 713 /**** T Y P E 1 D R I V E R C O N F I G U R A T I O N ****/ 714 /**** ****/ 715 /*************************************************************************/ 716 /*************************************************************************/ 717 718 719 /*************************************************************************/ 720 /* */ 721 /* T1_MAX_DICT_DEPTH is the maximum depth of nest dictionaries and */ 722 /* arrays in the Type 1 stream (see t1load.c). A minimum of 4 is */ 723 /* required. */ 724 /* */ 725 #define T1_MAX_DICT_DEPTH 5 726 727 728 /*************************************************************************/ 729 /* */ 730 /* T1_MAX_SUBRS_CALLS details the maximum number of nested sub-routine */ 731 /* calls during glyph loading. */ 732 /* */ 733 #define T1_MAX_SUBRS_CALLS 16 734 735 736 /*************************************************************************/ 737 /* */ 738 /* T1_MAX_CHARSTRING_OPERANDS is the charstring stack's capacity. A */ 739 /* minimum of 16 is required. */ 740 /* */ 741 /* The Chinese font MingTiEG-Medium (CNS 11643 character set) needs 256. */ 742 /* */ 743 #define T1_MAX_CHARSTRINGS_OPERANDS 256 744 745 746 /*************************************************************************/ 747 /* */ 748 /* Define this configuration macro if you want to prevent the */ 749 /* compilation of `t1afm', which is in charge of reading Type 1 AFM */ 750 /* files into an existing face. Note that if set, the T1 driver will be */ 751 /* unable to produce kerning distances. */ 752 /* */ 753 #undef T1_CONFIG_OPTION_NO_AFM 754 755 756 /*************************************************************************/ 757 /* */ 758 /* Define this configuration macro if you want to prevent the */ 759 /* compilation of the Multiple Masters font support in the Type 1 */ 760 /* driver. */ 761 /* */ 762 #undef T1_CONFIG_OPTION_NO_MM_SUPPORT 763 764 765 /*************************************************************************/ 766 /*************************************************************************/ 767 /**** ****/ 768 /**** C F F D R I V E R C O N F I G U R A T I O N ****/ 769 /**** ****/ 770 /*************************************************************************/ 771 /*************************************************************************/ 772 773 774 /*************************************************************************/ 775 /* */ 776 /* CFF_CONFIG_OPTION_OLD_ENGINE controls whether the pre-Adobe CFF */ 777 /* engine gets compiled into FreeType. If defined, it is possible to */ 778 /* switch between the two engines using the `hinting-engine' property of */ 779 /* the cff driver module. */ 780 /* */ 781 /* #define CFF_CONFIG_OPTION_OLD_ENGINE */ 782 783 784 /*************************************************************************/ 785 /*************************************************************************/ 786 /**** ****/ 787 /**** A U T O F I T M O D U L E C O N F I G U R A T I O N ****/ 788 /**** ****/ 789 /*************************************************************************/ 790 /*************************************************************************/ 791 792 793 /*************************************************************************/ 794 /* */ 795 /* Compile autofit module with CJK (Chinese, Japanese, Korean) script */ 796 /* support. */ 797 /* */ 798 #define AF_CONFIG_OPTION_CJK 799 800 /*************************************************************************/ 801 /* */ 802 /* Compile autofit module with Indic script support. */ 803 /* */ 804 #define AF_CONFIG_OPTION_INDIC 805 806 /*************************************************************************/ 807 /* */ 808 /* Compile autofit module with warp hinting. The idea of the warping */ 809 /* code is to slightly scale and shift a glyph within a single dimension */ 810 /* so that as much of its segments are aligned (more or less) on the */ 811 /* grid. To find out the optimal scaling and shifting value, various */ 812 /* parameter combinations are tried and scored. */ 813 /* */ 814 /* This experimental option is only active if the render mode is */ 815 /* FT_RENDER_MODE_LIGHT. */ 816 /* */ 817 /* #define AF_CONFIG_OPTION_USE_WARPER */ 818 819 /* */ 820 821 822 /* 823 * This macro is obsolete. Support has been removed in FreeType 824 * version 2.5. 825 */ 826 /* #define FT_CONFIG_OPTION_OLD_INTERNALS */ 827 828 829 /* 830 * This macro is defined if either unpatented or native TrueType 831 * hinting is requested by the definitions above. 832 */ 833 #ifdef TT_CONFIG_OPTION_BYTECODE_INTERPRETER 834 #define TT_USE_BYTECODE_INTERPRETER 835 #undef TT_CONFIG_OPTION_UNPATENTED_HINTING 836 #elif defined TT_CONFIG_OPTION_UNPATENTED_HINTING 837 #define TT_USE_BYTECODE_INTERPRETER 838 #endif 839 840 FT_END_HEADER 841 842 843 #endif /* __FTOPTION_H__ */ 844 845 846 /* END */ 847
