1 /***************************************************************************/ 2 /* */ 3 /* ftoption.h */ 4 /* */ 5 /* User-selectable configuration macros (specification only). */ 6 /* */ 7 /* Copyright 1996-2018 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 `$BUILD/freetype/config/ftoption.h', where `$BUILD' */ 42 /* is the name of a directory that is included _before_ the FreeType */ 43 /* include 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 `$BUILD/ft2build.h' and modify it */ 50 /* slightly to pre-define the macro FT_CONFIG_OPTIONS_H used to */ 51 /* locate this file during the build. For example, */ 52 /* */ 53 /* #define FT_CONFIG_OPTIONS_H <myftoptions.h> */ 54 /* #include <freetype/config/ftheader.h> */ 55 /* */ 56 /* will use `$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 <freetype/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 /* If you enable this configuration option, FreeType recognizes an */ 81 /* environment variable called `FREETYPE_PROPERTIES', which can be used */ 82 /* to control the various font drivers and modules. The controllable */ 83 /* properties are listed in the section @properties. */ 84 /* */ 85 /* `FREETYPE_PROPERTIES' has the following syntax form (broken here into */ 86 /* multiple lines for better readability). */ 87 /* */ 88 /* { */ 89 /* <optional whitespace> */ 90 /* <module-name1> ':' */ 91 /* <property-name1> '=' <property-value1> */ 92 /* <whitespace> */ 93 /* <module-name2> ':' */ 94 /* <property-name2> '=' <property-value2> */ 95 /* ... */ 96 /* } */ 97 /* */ 98 /* Example: */ 99 /* */ 100 /* FREETYPE_PROPERTIES=truetype:interpreter-version=35 \ */ 101 /* cff:no-stem-darkening=1 \ */ 102 /* autofitter:warping=1 */ 103 /* */ 104 #define FT_CONFIG_OPTION_ENVIRONMENT_PROPERTIES 105 106 107 /*************************************************************************/ 108 /* */ 109 /* Uncomment the line below if you want to activate LCD rendering */ 110 /* technology similar to ClearType in this build of the library. This */ 111 /* technology triples the resolution in the direction color subpixels. */ 112 /* To mitigate color fringes inherent to this technology, you also need */ 113 /* to explicitly set up LCD filtering. */ 114 /* */ 115 /* Note that this feature is covered by several Microsoft patents */ 116 /* and should not be activated in any default build of the library. */ 117 /* When this macro is not defined, FreeType offers alternative LCD */ 118 /* rendering technology that produces excellent output without LCD */ 119 /* filtering. */ 120 /* */ 121 /* #define FT_CONFIG_OPTION_SUBPIXEL_RENDERING */ 122 123 124 /*************************************************************************/ 125 /* */ 126 /* Many compilers provide a non-ANSI 64-bit data type that can be used */ 127 /* by FreeType to speed up some computations. However, this will create */ 128 /* some problems when compiling the library in strict ANSI mode. */ 129 /* */ 130 /* For this reason, the use of 64-bit integers is normally disabled when */ 131 /* the __STDC__ macro is defined. You can however disable this by */ 132 /* defining the macro FT_CONFIG_OPTION_FORCE_INT64 here. */ 133 /* */ 134 /* For most compilers, this will only create compilation warnings when */ 135 /* building the library. */ 136 /* */ 137 /* ObNote: The compiler-specific 64-bit integers are detected in the */ 138 /* file `ftconfig.h' either statically or through the */ 139 /* `configure' script on supported platforms. */ 140 /* */ 141 #undef FT_CONFIG_OPTION_FORCE_INT64 142 143 144 /*************************************************************************/ 145 /* */ 146 /* If this macro is defined, do not try to use an assembler version of */ 147 /* performance-critical functions (e.g. FT_MulFix). You should only do */ 148 /* that to verify that the assembler function works properly, or to */ 149 /* execute benchmark tests of the various implementations. */ 150 /* #define FT_CONFIG_OPTION_NO_ASSEMBLER */ 151 152 153 /*************************************************************************/ 154 /* */ 155 /* If this macro is defined, try to use an inlined assembler version of */ 156 /* the `FT_MulFix' function, which is a `hotspot' when loading and */ 157 /* hinting glyphs, and which should be executed as fast as possible. */ 158 /* */ 159 /* Note that if your compiler or CPU is not supported, this will default */ 160 /* to the standard and portable implementation found in `ftcalc.c'. */ 161 /* */ 162 #define FT_CONFIG_OPTION_INLINE_MULFIX 163 164 165 /*************************************************************************/ 166 /* */ 167 /* LZW-compressed file support. */ 168 /* */ 169 /* FreeType now handles font files that have been compressed with the */ 170 /* `compress' program. This is mostly used to parse many of the PCF */ 171 /* files that come with various X11 distributions. The implementation */ 172 /* uses NetBSD's `zopen' to partially uncompress the file on the fly */ 173 /* (see src/lzw/ftgzip.c). */ 174 /* */ 175 /* Define this macro if you want to enable this `feature'. */ 176 /* */ 177 /* #define FT_CONFIG_OPTION_USE_LZW */ 178 179 180 /*************************************************************************/ 181 /* */ 182 /* Gzip-compressed file support. */ 183 /* */ 184 /* FreeType now handles font files that have been compressed with the */ 185 /* `gzip' program. This is mostly used to parse many of the PCF files */ 186 /* that come with XFree86. The implementation uses `zlib' to */ 187 /* partially uncompress the file on the fly (see src/gzip/ftgzip.c). */ 188 /* */ 189 /* Define this macro if you want to enable this `feature'. See also */ 190 /* the macro FT_CONFIG_OPTION_SYSTEM_ZLIB below. */ 191 /* */ 192 /* #define FT_CONFIG_OPTION_USE_ZLIB */ 193 194 195 /*************************************************************************/ 196 /* */ 197 /* ZLib library selection */ 198 /* */ 199 /* This macro is only used when FT_CONFIG_OPTION_USE_ZLIB is defined. */ 200 /* It allows FreeType's `ftgzip' component to link to the system's */ 201 /* installation of the ZLib library. This is useful on systems like */ 202 /* Unix or VMS where it generally is already available. */ 203 /* */ 204 /* If you let it undefined, the component will use its own copy */ 205 /* of the zlib sources instead. These have been modified to be */ 206 /* included directly within the component and *not* export external */ 207 /* function names. This allows you to link any program with FreeType */ 208 /* _and_ ZLib without linking conflicts. */ 209 /* */ 210 /* Do not #undef this macro here since the build system might define */ 211 /* it for certain configurations only. */ 212 /* */ 213 /* If you use a build system like cmake or the `configure' script, */ 214 /* options set by those programs have precendence, overwriting the */ 215 /* value here with the configured one. */ 216 /* */ 217 /* #define FT_CONFIG_OPTION_SYSTEM_ZLIB */ 218 219 220 /*************************************************************************/ 221 /* */ 222 /* Bzip2-compressed file support. */ 223 /* */ 224 /* FreeType now handles font files that have been compressed with the */ 225 /* `bzip2' program. This is mostly used to parse many of the PCF */ 226 /* files that come with XFree86. The implementation uses `libbz2' to */ 227 /* partially uncompress the file on the fly (see src/bzip2/ftbzip2.c). */ 228 /* Contrary to gzip, bzip2 currently is not included and need to use */ 229 /* the system available bzip2 implementation. */ 230 /* */ 231 /* Define this macro if you want to enable this `feature'. */ 232 /* */ 233 /* If you use a build system like cmake or the `configure' script, */ 234 /* options set by those programs have precendence, overwriting the */ 235 /* value here with the configured one. */ 236 /* */ 237 /* #define FT_CONFIG_OPTION_USE_BZIP2 */ 238 239 240 /*************************************************************************/ 241 /* */ 242 /* Define to disable the use of file stream functions and types, FILE, */ 243 /* fopen() etc. Enables the use of smaller system libraries on embedded */ 244 /* systems that have multiple system libraries, some with or without */ 245 /* file stream support, in the cases where file stream support is not */ 246 /* necessary such as memory loading of font files. */ 247 /* */ 248 /* #define FT_CONFIG_OPTION_DISABLE_STREAM_SUPPORT */ 249 250 251 /*************************************************************************/ 252 /* */ 253 /* PNG bitmap support. */ 254 /* */ 255 /* FreeType now handles loading color bitmap glyphs in the PNG format. */ 256 /* This requires help from the external libpng library. Uncompressed */ 257 /* color bitmaps do not need any external libraries and will be */ 258 /* supported regardless of this configuration. */ 259 /* */ 260 /* Define this macro if you want to enable this `feature'. */ 261 /* */ 262 /* If you use a build system like cmake or the `configure' script, */ 263 /* options set by those programs have precendence, overwriting the */ 264 /* value here with the configured one. */ 265 /* */ 266 /* #define FT_CONFIG_OPTION_USE_PNG */ 267 268 269 /*************************************************************************/ 270 /* */ 271 /* HarfBuzz support. */ 272 /* */ 273 /* FreeType uses the HarfBuzz library to improve auto-hinting of */ 274 /* OpenType fonts. If available, many glyphs not directly addressable */ 275 /* by a font's character map will be hinted also. */ 276 /* */ 277 /* Define this macro if you want to enable this `feature'. */ 278 /* */ 279 /* If you use a build system like cmake or the `configure' script, */ 280 /* options set by those programs have precendence, overwriting the */ 281 /* value here with the configured one. */ 282 /* */ 283 /* #define FT_CONFIG_OPTION_USE_HARFBUZZ */ 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, but will not synthesize a missing Unicode charmap. */ 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 #define FT_RENDER_POOL_SIZE 16384L 382 383 384 /*************************************************************************/ 385 /* */ 386 /* FT_MAX_MODULES */ 387 /* */ 388 /* The maximum number of modules that can be registered in a single */ 389 /* FreeType library object. 32 is the default. */ 390 /* */ 391 #define FT_MAX_MODULES 32 392 393 394 /*************************************************************************/ 395 /* */ 396 /* Debug level */ 397 /* */ 398 /* FreeType can be compiled in debug or trace mode. In debug mode, */ 399 /* errors are reported through the `ftdebug' component. In trace */ 400 /* mode, additional messages are sent to the standard output during */ 401 /* execution. */ 402 /* */ 403 /* Define FT_DEBUG_LEVEL_ERROR to build the library in debug mode. */ 404 /* Define FT_DEBUG_LEVEL_TRACE to build it in trace mode. */ 405 /* */ 406 /* Don't define any of these macros to compile in `release' mode! */ 407 /* */ 408 /* Do not #undef these macros here since the build system might define */ 409 /* them for certain configurations only. */ 410 /* */ 411 /* #define FT_DEBUG_LEVEL_ERROR */ 412 /* #define FT_DEBUG_LEVEL_TRACE */ 413 414 415 /*************************************************************************/ 416 /* */ 417 /* Autofitter debugging */ 418 /* */ 419 /* If FT_DEBUG_AUTOFIT is defined, FreeType provides some means to */ 420 /* control the autofitter behaviour for debugging purposes with global */ 421 /* boolean variables (consequently, you should *never* enable this */ 422 /* while compiling in `release' mode): */ 423 /* */ 424 /* _af_debug_disable_horz_hints */ 425 /* _af_debug_disable_vert_hints */ 426 /* _af_debug_disable_blue_hints */ 427 /* */ 428 /* Additionally, the following functions provide dumps of various */ 429 /* internal autofit structures to stdout (using `printf'): */ 430 /* */ 431 /* af_glyph_hints_dump_points */ 432 /* af_glyph_hints_dump_segments */ 433 /* af_glyph_hints_dump_edges */ 434 /* af_glyph_hints_get_num_segments */ 435 /* af_glyph_hints_get_segment_offset */ 436 /* */ 437 /* As an argument, they use another global variable: */ 438 /* */ 439 /* _af_debug_hints */ 440 /* */ 441 /* Please have a look at the `ftgrid' demo program to see how those */ 442 /* variables and macros should be used. */ 443 /* */ 444 /* Do not #undef these macros here since the build system might define */ 445 /* them for certain configurations only. */ 446 /* */ 447 /* #define FT_DEBUG_AUTOFIT */ 448 449 450 /*************************************************************************/ 451 /* */ 452 /* Memory Debugging */ 453 /* */ 454 /* FreeType now comes with an integrated memory debugger that is */ 455 /* capable of detecting simple errors like memory leaks or double */ 456 /* deletes. To compile it within your build of the library, you */ 457 /* should define FT_DEBUG_MEMORY here. */ 458 /* */ 459 /* Note that the memory debugger is only activated at runtime when */ 460 /* when the _environment_ variable `FT2_DEBUG_MEMORY' is defined also! */ 461 /* */ 462 /* Do not #undef this macro here since the build system might define */ 463 /* it for certain configurations only. */ 464 /* */ 465 /* #define FT_DEBUG_MEMORY */ 466 467 468 /*************************************************************************/ 469 /* */ 470 /* Module errors */ 471 /* */ 472 /* If this macro is set (which is _not_ the default), the higher byte */ 473 /* of an error code gives the module in which the error has occurred, */ 474 /* while the lower byte is the real error code. */ 475 /* */ 476 /* Setting this macro makes sense for debugging purposes only, since */ 477 /* it would break source compatibility of certain programs that use */ 478 /* FreeType 2. */ 479 /* */ 480 /* More details can be found in the files ftmoderr.h and fterrors.h. */ 481 /* */ 482 #undef FT_CONFIG_OPTION_USE_MODULE_ERRORS 483 484 485 /*************************************************************************/ 486 /* */ 487 /* Position Independent Code */ 488 /* */ 489 /* If this macro is set (which is _not_ the default), FreeType2 will */ 490 /* avoid creating constants that require address fixups. Instead the */ 491 /* constants will be moved into a struct and additional intialization */ 492 /* code will be used. */ 493 /* */ 494 /* Setting this macro is needed for systems that prohibit address */ 495 /* fixups, such as BREW. [Note that standard compilers like gcc or */ 496 /* clang handle PIC generation automatically; you don't have to set */ 497 /* FT_CONFIG_OPTION_PIC, which is only necessary for very special */ 498 /* compilers.] */ 499 /* */ 500 /* Note that FT_CONFIG_OPTION_PIC support is not available for all */ 501 /* modules (see `modules.cfg' for a complete list). For building with */ 502 /* FT_CONFIG_OPTION_PIC support, do the following. */ 503 /* */ 504 /* 0. Clone the repository. */ 505 /* 1. Define FT_CONFIG_OPTION_PIC. */ 506 /* 2. Remove all subdirectories in `src' that don't have */ 507 /* FT_CONFIG_OPTION_PIC support. */ 508 /* 3. Comment out the corresponding modules in `modules.cfg'. */ 509 /* 4. Compile. */ 510 /* */ 511 /* #define FT_CONFIG_OPTION_PIC */ 512 513 514 /*************************************************************************/ 515 /*************************************************************************/ 516 /**** ****/ 517 /**** S F N T D R I V E R C O N F I G U R A T I O N ****/ 518 /**** ****/ 519 /*************************************************************************/ 520 /*************************************************************************/ 521 522 523 /*************************************************************************/ 524 /* */ 525 /* Define TT_CONFIG_OPTION_EMBEDDED_BITMAPS if you want to support */ 526 /* embedded bitmaps in all formats using the SFNT module (namely */ 527 /* TrueType & OpenType). */ 528 /* */ 529 #define TT_CONFIG_OPTION_EMBEDDED_BITMAPS 530 531 532 /*************************************************************************/ 533 /* */ 534 /* Define TT_CONFIG_OPTION_POSTSCRIPT_NAMES if you want to be able to */ 535 /* load and enumerate the glyph Postscript names in a TrueType or */ 536 /* OpenType file. */ 537 /* */ 538 /* Note that when you do not compile the `PSNames' module by undefining */ 539 /* the above FT_CONFIG_OPTION_POSTSCRIPT_NAMES, the `sfnt' module will */ 540 /* contain additional code used to read the PS Names table from a font. */ 541 /* */ 542 /* (By default, the module uses `PSNames' to extract glyph names.) */ 543 /* */ 544 #define TT_CONFIG_OPTION_POSTSCRIPT_NAMES 545 546 547 /*************************************************************************/ 548 /* */ 549 /* Define TT_CONFIG_OPTION_SFNT_NAMES if your applications need to */ 550 /* access the internal name table in a SFNT-based format like TrueType */ 551 /* or OpenType. The name table contains various strings used to */ 552 /* describe the font, like family name, copyright, version, etc. It */ 553 /* does not contain any glyph name though. */ 554 /* */ 555 /* Accessing SFNT names is done through the functions declared in */ 556 /* `ftsnames.h'. */ 557 /* */ 558 #define TT_CONFIG_OPTION_SFNT_NAMES 559 560 561 /*************************************************************************/ 562 /* */ 563 /* TrueType CMap support */ 564 /* */ 565 /* Here you can fine-tune which TrueType CMap table format shall be */ 566 /* supported. */ 567 #define TT_CONFIG_CMAP_FORMAT_0 568 #define TT_CONFIG_CMAP_FORMAT_2 569 #define TT_CONFIG_CMAP_FORMAT_4 570 #define TT_CONFIG_CMAP_FORMAT_6 571 #define TT_CONFIG_CMAP_FORMAT_8 572 #define TT_CONFIG_CMAP_FORMAT_10 573 #define TT_CONFIG_CMAP_FORMAT_12 574 #define TT_CONFIG_CMAP_FORMAT_13 575 #define TT_CONFIG_CMAP_FORMAT_14 576 577 578 /*************************************************************************/ 579 /*************************************************************************/ 580 /**** ****/ 581 /**** 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 ****/ 582 /**** ****/ 583 /*************************************************************************/ 584 /*************************************************************************/ 585 586 /*************************************************************************/ 587 /* */ 588 /* Define TT_CONFIG_OPTION_BYTECODE_INTERPRETER if you want to compile */ 589 /* a bytecode interpreter in the TrueType driver. */ 590 /* */ 591 /* By undefining this, you will only compile the code necessary to load */ 592 /* TrueType glyphs without hinting. */ 593 /* */ 594 /* Do not #undef this macro here, since the build system might */ 595 /* define it for certain configurations only. */ 596 /* */ 597 #define TT_CONFIG_OPTION_BYTECODE_INTERPRETER 598 599 600 /*************************************************************************/ 601 /* */ 602 /* Define TT_CONFIG_OPTION_SUBPIXEL_HINTING if you want to compile */ 603 /* subpixel hinting support into the TrueType driver. This modifies the */ 604 /* TrueType hinting mechanism when anything but FT_RENDER_MODE_MONO is */ 605 /* requested. */ 606 /* */ 607 /* In particular, it modifies the bytecode interpreter to interpret (or */ 608 /* not) instructions in a certain way so that all TrueType fonts look */ 609 /* like they do in a Windows ClearType (DirectWrite) environment. See */ 610 /* [1] for a technical overview on what this means. See `ttinterp.h' */ 611 /* for more details on the LEAN option. */ 612 /* */ 613 /* There are three possible values. */ 614 /* */ 615 /* Value 1: */ 616 /* This value is associated with the `Infinality' moniker, */ 617 /* contributed by an individual nicknamed Infinality with the goal of */ 618 /* making TrueType fonts render better than on Windows. A high */ 619 /* amount of configurability and flexibility, down to rules for */ 620 /* single glyphs in fonts, but also very slow. Its experimental and */ 621 /* slow nature and the original developer losing interest meant that */ 622 /* this option was never enabled in default builds. */ 623 /* */ 624 /* The corresponding interpreter version is v38. */ 625 /* */ 626 /* Value 2: */ 627 /* The new default mode for the TrueType driver. The Infinality code */ 628 /* base was stripped to the bare minimum and all configurability */ 629 /* removed in the name of speed and simplicity. The configurability */ 630 /* was mainly aimed at legacy fonts like Arial, Times New Roman, or */ 631 /* Courier. Legacy fonts are fonts that modify vertical stems to */ 632 /* achieve clean black-and-white bitmaps. The new mode focuses on */ 633 /* applying a minimal set of rules to all fonts indiscriminately so */ 634 /* that modern and web fonts render well while legacy fonts render */ 635 /* okay. */ 636 /* */ 637 /* The corresponding interpreter version is v40. */ 638 /* */ 639 /* Value 3: */ 640 /* Compile both, making both v38 and v40 available (the latter is the */ 641 /* default). */ 642 /* */ 643 /* By undefining these, you get rendering behavior like on Windows */ 644 /* without ClearType, i.e., Windows XP without ClearType enabled and */ 645 /* Win9x (interpreter version v35). Or not, depending on how much */ 646 /* hinting blood and testing tears the font designer put into a given */ 647 /* font. If you define one or both subpixel hinting options, you can */ 648 /* switch between between v35 and the ones you define (using */ 649 /* `FT_Property_Set'). */ 650 /* */ 651 /* This option requires TT_CONFIG_OPTION_BYTECODE_INTERPRETER to be */ 652 /* defined. */ 653 /* */ 654 /* [1] https://www.microsoft.com/typography/cleartype/truetypecleartype.aspx */ 655 /* */ 656 /* #define TT_CONFIG_OPTION_SUBPIXEL_HINTING 1 */ 657 #define TT_CONFIG_OPTION_SUBPIXEL_HINTING 2 658 /* #define TT_CONFIG_OPTION_SUBPIXEL_HINTING ( 1 | 2 ) */ 659 660 661 /*************************************************************************/ 662 /* */ 663 /* Define TT_CONFIG_OPTION_COMPONENT_OFFSET_SCALED to compile the */ 664 /* TrueType glyph loader to use Apple's definition of how to handle */ 665 /* component offsets in composite glyphs. */ 666 /* */ 667 /* Apple and MS disagree on the default behavior of component offsets */ 668 /* in composites. Apple says that they should be scaled by the scaling */ 669 /* factors in the transformation matrix (roughly, it's more complex) */ 670 /* while MS says they should not. OpenType defines two bits in the */ 671 /* composite flags array which can be used to disambiguate, but old */ 672 /* fonts will not have them. */ 673 /* */ 674 /* https://www.microsoft.com/typography/otspec/glyf.htm */ 675 /* https://developer.apple.com/fonts/TrueType-Reference-Manual/RM06/Chap6glyf.html */ 676 /* */ 677 #undef TT_CONFIG_OPTION_COMPONENT_OFFSET_SCALED 678 679 680 /*************************************************************************/ 681 /* */ 682 /* Define TT_CONFIG_OPTION_GX_VAR_SUPPORT if you want to include */ 683 /* support for Apple's distortable font technology (fvar, gvar, cvar, */ 684 /* and avar tables). This has many similarities to Type 1 Multiple */ 685 /* Masters support. */ 686 /* */ 687 #define TT_CONFIG_OPTION_GX_VAR_SUPPORT 688 689 690 /*************************************************************************/ 691 /* */ 692 /* Define TT_CONFIG_OPTION_BDF if you want to include support for */ 693 /* an embedded `BDF ' table within SFNT-based bitmap formats. */ 694 /* */ 695 /* #define TT_CONFIG_OPTION_BDF */ 696 697 698 /*************************************************************************/ 699 /* */ 700 /* Option TT_CONFIG_OPTION_MAX_RUNNABLE_OPCODES controls the maximum */ 701 /* number of bytecode instructions executed for a single run of the */ 702 /* bytecode interpreter, needed to prevent infinite loops. You don't */ 703 /* want to change this except for very special situations (e.g., making */ 704 /* a library fuzzer spend less time to handle broken fonts). */ 705 /* */ 706 /* It is not expected that this value is ever modified by a configuring */ 707 /* script; instead, it gets surrounded with #ifndef ... #endif so that */ 708 /* the value can be set as a preprocessor option on the compiler's */ 709 /* command line. */ 710 /* */ 711 #ifndef TT_CONFIG_OPTION_MAX_RUNNABLE_OPCODES 712 #define TT_CONFIG_OPTION_MAX_RUNNABLE_OPCODES 1000000L 713 #endif 714 715 716 /*************************************************************************/ 717 /*************************************************************************/ 718 /**** ****/ 719 /**** T Y P E 1 D R I V E R C O N F I G U R A T I O N ****/ 720 /**** ****/ 721 /*************************************************************************/ 722 /*************************************************************************/ 723 724 725 /*************************************************************************/ 726 /* */ 727 /* T1_MAX_DICT_DEPTH is the maximum depth of nest dictionaries and */ 728 /* arrays in the Type 1 stream (see t1load.c). A minimum of 4 is */ 729 /* required. */ 730 /* */ 731 #define T1_MAX_DICT_DEPTH 5 732 733 734 /*************************************************************************/ 735 /* */ 736 /* T1_MAX_SUBRS_CALLS details the maximum number of nested sub-routine */ 737 /* calls during glyph loading. */ 738 /* */ 739 #define T1_MAX_SUBRS_CALLS 16 740 741 742 /*************************************************************************/ 743 /* */ 744 /* T1_MAX_CHARSTRING_OPERANDS is the charstring stack's capacity. A */ 745 /* minimum of 16 is required. */ 746 /* */ 747 /* The Chinese font MingTiEG-Medium (CNS 11643 character set) needs 256. */ 748 /* */ 749 #define T1_MAX_CHARSTRINGS_OPERANDS 256 750 751 752 /*************************************************************************/ 753 /* */ 754 /* Define this configuration macro if you want to prevent the */ 755 /* compilation of `t1afm', which is in charge of reading Type 1 AFM */ 756 /* files into an existing face. Note that if set, the T1 driver will be */ 757 /* unable to produce kerning distances. */ 758 /* */ 759 #undef T1_CONFIG_OPTION_NO_AFM 760 761 762 /*************************************************************************/ 763 /* */ 764 /* Define this configuration macro if you want to prevent the */ 765 /* compilation of the Multiple Masters font support in the Type 1 */ 766 /* driver. */ 767 /* */ 768 #undef T1_CONFIG_OPTION_NO_MM_SUPPORT 769 770 771 /*************************************************************************/ 772 /* */ 773 /* T1_CONFIG_OPTION_OLD_ENGINE controls whether the pre-Adobe Type 1 */ 774 /* engine gets compiled into FreeType. If defined, it is possible to */ 775 /* switch between the two engines using the `hinting-engine' property of */ 776 /* the type1 driver module. */ 777 /* */ 778 /* #define T1_CONFIG_OPTION_OLD_ENGINE */ 779 780 781 /*************************************************************************/ 782 /*************************************************************************/ 783 /**** ****/ 784 /**** C F F D R I V E R C O N F I G U R A T I O N ****/ 785 /**** ****/ 786 /*************************************************************************/ 787 /*************************************************************************/ 788 789 790 /*************************************************************************/ 791 /* */ 792 /* Using CFF_CONFIG_OPTION_DARKENING_PARAMETER_{X,Y}{1,2,3,4} it is */ 793 /* possible to set up the default values of the four control points that */ 794 /* define the stem darkening behaviour of the (new) CFF engine. For */ 795 /* more details please read the documentation of the */ 796 /* `darkening-parameters' property (file `ftdriver.h'), which allows the */ 797 /* control at run-time. */ 798 /* */ 799 /* Do *not* undefine these macros! */ 800 /* */ 801 #define CFF_CONFIG_OPTION_DARKENING_PARAMETER_X1 500 802 #define CFF_CONFIG_OPTION_DARKENING_PARAMETER_Y1 400 803 804 #define CFF_CONFIG_OPTION_DARKENING_PARAMETER_X2 1000 805 #define CFF_CONFIG_OPTION_DARKENING_PARAMETER_Y2 275 806 807 #define CFF_CONFIG_OPTION_DARKENING_PARAMETER_X3 1667 808 #define CFF_CONFIG_OPTION_DARKENING_PARAMETER_Y3 275 809 810 #define CFF_CONFIG_OPTION_DARKENING_PARAMETER_X4 2333 811 #define CFF_CONFIG_OPTION_DARKENING_PARAMETER_Y4 0 812 813 814 /*************************************************************************/ 815 /* */ 816 /* CFF_CONFIG_OPTION_OLD_ENGINE controls whether the pre-Adobe CFF */ 817 /* engine gets compiled into FreeType. If defined, it is possible to */ 818 /* switch between the two engines using the `hinting-engine' property of */ 819 /* the cff driver module. */ 820 /* */ 821 /* #define CFF_CONFIG_OPTION_OLD_ENGINE */ 822 823 824 /*************************************************************************/ 825 /*************************************************************************/ 826 /**** ****/ 827 /**** P C F D R I V E R C O N F I G U R A T I O N ****/ 828 /**** ****/ 829 /*************************************************************************/ 830 /*************************************************************************/ 831 832 833 /*************************************************************************/ 834 /* */ 835 /* There are many PCF fonts just called `Fixed' which look completely */ 836 /* different, and which have nothing to do with each other. When */ 837 /* selecting `Fixed' in KDE or Gnome one gets results that appear rather */ 838 /* random, the style changes often if one changes the size and one */ 839 /* cannot select some fonts at all. This option makes the PCF module */ 840 /* prepend the foundry name (plus a space) to the family name. */ 841 /* */ 842 /* We also check whether we have `wide' characters; all put together, we */ 843 /* get family names like `Sony Fixed' or `Misc Fixed Wide'. */ 844 /* */ 845 /* If this option is activated, it can be controlled with the */ 846 /* `no-long-family-names' property of the pcf driver module. */ 847 /* */ 848 /* #define PCF_CONFIG_OPTION_LONG_FAMILY_NAMES */ 849 850 851 /*************************************************************************/ 852 /*************************************************************************/ 853 /**** ****/ 854 /**** 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 ****/ 855 /**** ****/ 856 /*************************************************************************/ 857 /*************************************************************************/ 858 859 860 /*************************************************************************/ 861 /* */ 862 /* Compile autofit module with CJK (Chinese, Japanese, Korean) script */ 863 /* support. */ 864 /* */ 865 #define AF_CONFIG_OPTION_CJK 866 867 /*************************************************************************/ 868 /* */ 869 /* Compile autofit module with fallback Indic script support, covering */ 870 /* some scripts that the `latin' submodule of the autofit module doesn't */ 871 /* (yet) handle. */ 872 /* */ 873 #define AF_CONFIG_OPTION_INDIC 874 875 /*************************************************************************/ 876 /* */ 877 /* Compile autofit module with warp hinting. The idea of the warping */ 878 /* code is to slightly scale and shift a glyph within a single dimension */ 879 /* so that as much of its segments are aligned (more or less) on the */ 880 /* grid. To find out the optimal scaling and shifting value, various */ 881 /* parameter combinations are tried and scored. */ 882 /* */ 883 /* This experimental option is active only if the rendering mode is */ 884 /* FT_RENDER_MODE_LIGHT; you can switch warping on and off with the */ 885 /* `warping' property of the auto-hinter (see file `ftdriver.h' for more */ 886 /* information; by default it is switched off). */ 887 /* */ 888 #define AF_CONFIG_OPTION_USE_WARPER 889 890 /*************************************************************************/ 891 /* */ 892 /* Use TrueType-like size metrics for `light' auto-hinting. */ 893 /* */ 894 /* It is strongly recommended to avoid this option, which exists only to */ 895 /* help some legacy applications retain its appearance and behaviour */ 896 /* with respect to auto-hinted TrueType fonts. */ 897 /* */ 898 /* The very reason this option exists at all are GNU/Linux distributions */ 899 /* like Fedora that did not un-patch the following change (which was */ 900 /* present in FreeType between versions 2.4.6 and 2.7.1, inclusive). */ 901 /* */ 902 /* 2011-07-16 Steven Chu <steven.f.chu@gmail.com> */ 903 /* */ 904 /* [truetype] Fix metrics on size request for scalable fonts. */ 905 /* */ 906 /* This problematic commit is now reverted (more or less). */ 907 /* */ 908 /* #define AF_CONFIG_OPTION_TT_SIZE_METRICS */ 909 910 /* */ 911 912 913 /* 914 * This macro is obsolete. Support has been removed in FreeType 915 * version 2.5. 916 */ 917 /* #define FT_CONFIG_OPTION_OLD_INTERNALS */ 918 919 920 /* 921 * This macro is defined if native TrueType hinting is requested by the 922 * definitions above. 923 */ 924 #ifdef TT_CONFIG_OPTION_BYTECODE_INTERPRETER 925 #define TT_USE_BYTECODE_INTERPRETER 926 927 #ifdef TT_CONFIG_OPTION_SUBPIXEL_HINTING 928 #if TT_CONFIG_OPTION_SUBPIXEL_HINTING & 1 929 #define TT_SUPPORT_SUBPIXEL_HINTING_INFINALITY 930 #endif 931 932 #if TT_CONFIG_OPTION_SUBPIXEL_HINTING & 2 933 #define TT_SUPPORT_SUBPIXEL_HINTING_MINIMAL 934 #endif 935 #endif 936 #endif 937 938 939 /* 940 * Check CFF darkening parameters. The checks are the same as in function 941 * `cff_property_set' in file `cffdrivr.c'. 942 */ 943 #if CFF_CONFIG_OPTION_DARKENING_PARAMETER_X1 < 0 || \ 944 CFF_CONFIG_OPTION_DARKENING_PARAMETER_X2 < 0 || \ 945 CFF_CONFIG_OPTION_DARKENING_PARAMETER_X3 < 0 || \ 946 CFF_CONFIG_OPTION_DARKENING_PARAMETER_X4 < 0 || \ 947 \ 948 CFF_CONFIG_OPTION_DARKENING_PARAMETER_Y1 < 0 || \ 949 CFF_CONFIG_OPTION_DARKENING_PARAMETER_Y2 < 0 || \ 950 CFF_CONFIG_OPTION_DARKENING_PARAMETER_Y3 < 0 || \ 951 CFF_CONFIG_OPTION_DARKENING_PARAMETER_Y4 < 0 || \ 952 \ 953 CFF_CONFIG_OPTION_DARKENING_PARAMETER_X1 > \ 954 CFF_CONFIG_OPTION_DARKENING_PARAMETER_X2 || \ 955 CFF_CONFIG_OPTION_DARKENING_PARAMETER_X2 > \ 956 CFF_CONFIG_OPTION_DARKENING_PARAMETER_X3 || \ 957 CFF_CONFIG_OPTION_DARKENING_PARAMETER_X3 > \ 958 CFF_CONFIG_OPTION_DARKENING_PARAMETER_X4 || \ 959 \ 960 CFF_CONFIG_OPTION_DARKENING_PARAMETER_Y1 > 500 || \ 961 CFF_CONFIG_OPTION_DARKENING_PARAMETER_Y2 > 500 || \ 962 CFF_CONFIG_OPTION_DARKENING_PARAMETER_Y3 > 500 || \ 963 CFF_CONFIG_OPTION_DARKENING_PARAMETER_Y4 > 500 964 #error "Invalid CFF darkening parameters!" 965 #endif 966 967 FT_END_HEADER 968 969 970 #endif /* FTOPTION_H_ */ 971 972 973 /* END */