1 /**************************************************************************** 2 * 3 * ftoption.h 4 * 5 * User-selectable configuration macros (specification only). 6 * 7 * Copyright (C) 1996-2021 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 a 33 * standard build of the FreeType library. There are three ways to use 34 * 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 library 38 * 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` is 42 * the name of a directory that is included _before_ the FreeType include 43 * path during compilation. 44 * 45 * The default FreeType Makefiles use the build directory 46 * `builds/<system>` by default, but you can easily change that for your 47 * own projects. 48 * 49 * - Copy the file <ft2build.h> to `$BUILD/ft2build.h` and modify it 50 * slightly to pre-define the macro `FT_CONFIG_OPTIONS_H` used to locate 51 * this file during the build. For example, 52 * 53 * ``` 54 * #define FT_CONFIG_OPTIONS_H <myftoptions.h> 55 * #include <freetype/config/ftheader.h> 56 * ``` 57 * 58 * will use `$BUILD/myftoptions.h` instead of this file for macro 59 * definitions. 60 * 61 * Note also that you can similarly pre-define the macro 62 * `FT_CONFIG_MODULES_H` used to locate the file listing of the modules 63 * that are statically linked to the library at compile time. By 64 * default, this file is `<freetype/config/ftmodule.h>`. 65 * 66 * We highly recommend using the third method whenever possible. 67 * 68 */ 69 70 71 /*************************************************************************/ 72 /*************************************************************************/ 73 /**** ****/ 74 /**** 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 ****/ 75 /**** ****/ 76 /*************************************************************************/ 77 /*************************************************************************/ 78 79 80 /*#************************************************************************ 81 * 82 * If you enable this configuration option, FreeType recognizes an 83 * environment variable called `FREETYPE_PROPERTIES`, which can be used to 84 * control the various font drivers and modules. The controllable 85 * properties are listed in the section @properties. 86 * 87 * You have to undefine this configuration option on platforms that lack 88 * the concept of environment variables (and thus don't have the `getenv` 89 * function), for example Windows CE. 90 * 91 * `FREETYPE_PROPERTIES` has the following syntax form (broken here into 92 * multiple lines for better readability). 93 * 94 * ``` 95 * <optional whitespace> 96 * <module-name1> ':' 97 * <property-name1> '=' <property-value1> 98 * <whitespace> 99 * <module-name2> ':' 100 * <property-name2> '=' <property-value2> 101 * ... 102 * ``` 103 * 104 * Example: 105 * 106 * ``` 107 * FREETYPE_PROPERTIES=truetype:interpreter-version=35 \ 108 * cff:no-stem-darkening=1 109 * ``` 110 * 111 */ 112 /* ANDROID: disabled */ 113 /* #define FT_CONFIG_OPTION_ENVIRONMENT_PROPERTIES */ 114 115 116 /************************************************************************** 117 * 118 * Uncomment the line below if you want to activate LCD rendering 119 * technology similar to ClearType in this build of the library. This 120 * technology triples the resolution in the direction color subpixels. To 121 * mitigate color fringes inherent to this technology, you also need to 122 * explicitly set up LCD filtering. 123 * 124 * When this macro is not defined, FreeType offers alternative LCD 125 * rendering technology that produces excellent output. 126 */ 127 /* #define FT_CONFIG_OPTION_SUBPIXEL_RENDERING */ 128 129 130 /************************************************************************** 131 * 132 * Many compilers provide a non-ANSI 64-bit data type that can be used by 133 * FreeType to speed up some computations. However, this will create some 134 * problems when compiling the library in strict ANSI mode. 135 * 136 * For this reason, the use of 64-bit integers is normally disabled when 137 * the `__STDC__` macro is defined. You can however disable this by 138 * defining the macro `FT_CONFIG_OPTION_FORCE_INT64` here. 139 * 140 * For most compilers, this will only create compilation warnings when 141 * building the library. 142 * 143 * ObNote: The compiler-specific 64-bit integers are detected in the 144 * file `ftconfig.h` either statically or through the `configure` 145 * script on supported platforms. 146 */ 147 #undef FT_CONFIG_OPTION_FORCE_INT64 148 149 150 /************************************************************************** 151 * 152 * If this macro is defined, do not try to use an assembler version of 153 * performance-critical functions (e.g., @FT_MulFix). You should only do 154 * that to verify that the assembler function works properly, or to execute 155 * benchmark tests of the various implementations. 156 */ 157 /* #define FT_CONFIG_OPTION_NO_ASSEMBLER */ 158 159 160 /************************************************************************** 161 * 162 * If this macro is defined, try to use an inlined assembler version of the 163 * @FT_MulFix function, which is a 'hotspot' when loading and hinting 164 * glyphs, and which should be executed as fast as possible. 165 * 166 * Note that if your compiler or CPU is not supported, this will default to 167 * the standard and portable implementation found in `ftcalc.c`. 168 */ 169 #define FT_CONFIG_OPTION_INLINE_MULFIX 170 171 172 /************************************************************************** 173 * 174 * LZW-compressed file support. 175 * 176 * FreeType now handles font files that have been compressed with the 177 * `compress` program. This is mostly used to parse many of the PCF 178 * files that come with various X11 distributions. The implementation 179 * uses NetBSD's `zopen` to partially uncompress the file on the fly (see 180 * `src/lzw/ftgzip.c`). 181 * 182 * Define this macro if you want to enable this 'feature'. 183 */ 184 #define FT_CONFIG_OPTION_USE_LZW 185 186 187 /************************************************************************** 188 * 189 * Gzip-compressed file support. 190 * 191 * FreeType now handles font files that have been compressed with the 192 * `gzip` program. This is mostly used to parse many of the PCF files 193 * that come with XFree86. The implementation uses 'zlib' to partially 194 * uncompress the file on the fly (see `src/gzip/ftgzip.c`). 195 * 196 * Define this macro if you want to enable this 'feature'. See also the 197 * macro `FT_CONFIG_OPTION_SYSTEM_ZLIB` below. 198 */ 199 /* #define FT_CONFIG_OPTION_USE_ZLIB */ 200 201 202 /************************************************************************** 203 * 204 * ZLib library selection 205 * 206 * This macro is only used when `FT_CONFIG_OPTION_USE_ZLIB` is defined. 207 * It allows FreeType's 'ftgzip' component to link to the system's 208 * installation of the ZLib library. This is useful on systems like 209 * Unix or VMS where it generally is already available. 210 * 211 * If you let it undefined, the component will use its own copy of the 212 * zlib sources instead. These have been modified to be included 213 * directly within the component and **not** export external function 214 * names. This allows you to link any program with FreeType _and_ ZLib 215 * without linking conflicts. 216 * 217 * Do not `#undef` this macro here since the build system might define 218 * it for certain configurations only. 219 * 220 * If you use a build system like cmake or the `configure` script, 221 * options set by those programs have precedence, overwriting the value 222 * here with the configured one. 223 */ 224 /* #define FT_CONFIG_OPTION_SYSTEM_ZLIB */ 225 226 227 /************************************************************************** 228 * 229 * Bzip2-compressed file support. 230 * 231 * FreeType now handles font files that have been compressed with the 232 * `bzip2` program. This is mostly used to parse many of the PCF files 233 * that come with XFree86. The implementation uses `libbz2` to partially 234 * uncompress the file on the fly (see `src/bzip2/ftbzip2.c`). Contrary 235 * to gzip, bzip2 currently is not included and need to use the system 236 * available bzip2 implementation. 237 * 238 * Define this macro if you want to enable this 'feature'. 239 * 240 * If you use a build system like cmake or the `configure` script, 241 * options set by those programs have precedence, overwriting the value 242 * here with the configured one. 243 */ 244 /* #define FT_CONFIG_OPTION_USE_BZIP2 */ 245 246 247 /************************************************************************** 248 * 249 * Define to disable the use of file stream functions and types, `FILE`, 250 * `fopen`, etc. Enables the use of smaller system libraries on embedded 251 * systems that have multiple system libraries, some with or without file 252 * stream support, in the cases where file stream support is not necessary 253 * such as memory loading of font files. 254 */ 255 /* #define FT_CONFIG_OPTION_DISABLE_STREAM_SUPPORT */ 256 257 258 /************************************************************************** 259 * 260 * PNG bitmap support. 261 * 262 * FreeType now handles loading color bitmap glyphs in the PNG format. 263 * This requires help from the external libpng library. Uncompressed 264 * color bitmaps do not need any external libraries and will be supported 265 * regardless of this configuration. 266 * 267 * Define this macro if you want to enable this 'feature'. 268 * 269 * If you use a build system like cmake or the `configure` script, 270 * options set by those programs have precedence, overwriting the value 271 * here with the configured one. 272 */ 273 /* ANDROID: enabled */ 274 /* #define FT_CONFIG_OPTION_USE_PNG */ 275 276 277 /************************************************************************** 278 * 279 * HarfBuzz support. 280 * 281 * FreeType uses the HarfBuzz library to improve auto-hinting of OpenType 282 * fonts. If available, many glyphs not directly addressable by a font's 283 * character map will be hinted also. 284 * 285 * Define this macro if you want to enable this 'feature'. 286 * 287 * If you use a build system like cmake or the `configure` script, 288 * options set by those programs have precedence, overwriting the value 289 * here with the configured one. 290 */ 291 /* #define FT_CONFIG_OPTION_USE_HARFBUZZ */ 292 293 294 /************************************************************************** 295 * 296 * Brotli support. 297 * 298 * FreeType uses the Brotli library to provide support for decompressing 299 * WOFF2 streams. 300 * 301 * Define this macro if you want to enable this 'feature'. 302 * 303 * If you use a build system like cmake or the `configure` script, 304 * options set by those programs have precedence, overwriting the value 305 * here with the configured one. 306 */ 307 /* #define FT_CONFIG_OPTION_USE_BROTLI */ 308 309 310 /************************************************************************** 311 * 312 * Glyph Postscript Names handling 313 * 314 * By default, FreeType 2 is compiled with the 'psnames' module. This 315 * module is in charge of converting a glyph name string into a Unicode 316 * value, or return a Macintosh standard glyph name for the use with the 317 * TrueType 'post' table. 318 * 319 * Undefine this macro if you do not want 'psnames' compiled in your 320 * build of FreeType. This has the following effects: 321 * 322 * - The TrueType driver will provide its own set of glyph names, if you 323 * build it to support postscript names in the TrueType 'post' table, 324 * but will not synthesize a missing Unicode charmap. 325 * 326 * - The Type~1 driver will not be able to synthesize a Unicode charmap 327 * out of the glyphs found in the fonts. 328 * 329 * You would normally undefine this configuration macro when building a 330 * version of FreeType that doesn't contain a Type~1 or CFF driver. 331 */ 332 #define FT_CONFIG_OPTION_POSTSCRIPT_NAMES 333 334 335 /************************************************************************** 336 * 337 * Postscript Names to Unicode Values support 338 * 339 * By default, FreeType~2 is built with the 'psnames' module compiled in. 340 * Among other things, the module is used to convert a glyph name into a 341 * Unicode value. This is especially useful in order to synthesize on 342 * the fly a Unicode charmap from the CFF/Type~1 driver through a big 343 * table named the 'Adobe Glyph List' (AGL). 344 * 345 * Undefine this macro if you do not want the Adobe Glyph List compiled 346 * in your 'psnames' module. The Type~1 driver will not be able to 347 * synthesize a Unicode charmap out of the glyphs found in the fonts. 348 */ 349 #define FT_CONFIG_OPTION_ADOBE_GLYPH_LIST 350 351 352 /************************************************************************** 353 * 354 * Support for Mac fonts 355 * 356 * Define this macro if you want support for outline fonts in Mac format 357 * (mac dfont, mac resource, macbinary containing a mac resource) on 358 * non-Mac platforms. 359 * 360 * Note that the 'FOND' resource isn't checked. 361 */ 362 #define FT_CONFIG_OPTION_MAC_FONTS 363 364 365 /************************************************************************** 366 * 367 * Guessing methods to access embedded resource forks 368 * 369 * Enable extra Mac fonts support on non-Mac platforms (e.g., GNU/Linux). 370 * 371 * Resource forks which include fonts data are stored sometimes in 372 * locations which users or developers don't expected. In some cases, 373 * resource forks start with some offset from the head of a file. In 374 * other cases, the actual resource fork is stored in file different from 375 * what the user specifies. If this option is activated, FreeType tries 376 * to guess whether such offsets or different file names must be used. 377 * 378 * Note that normal, direct access of resource forks is controlled via 379 * the `FT_CONFIG_OPTION_MAC_FONTS` option. 380 */ 381 #ifdef FT_CONFIG_OPTION_MAC_FONTS 382 #define FT_CONFIG_OPTION_GUESSING_EMBEDDED_RFORK 383 #endif 384 385 386 /************************************************************************** 387 * 388 * Allow the use of `FT_Incremental_Interface` to load typefaces that 389 * contain no glyph data, but supply it via a callback function. This is 390 * required by clients supporting document formats which supply font data 391 * incrementally as the document is parsed, such as the Ghostscript 392 * interpreter for the PostScript language. 393 */ 394 /* ANDROID: disabled */ 395 /* #define FT_CONFIG_OPTION_INCREMENTAL */ 396 397 398 /************************************************************************** 399 * 400 * The size in bytes of the render pool used by the scan-line converter to 401 * do all of its work. 402 */ 403 #define FT_RENDER_POOL_SIZE 16384L 404 405 406 /************************************************************************** 407 * 408 * FT_MAX_MODULES 409 * 410 * The maximum number of modules that can be registered in a single 411 * FreeType library object. 32~is the default. 412 */ 413 #define FT_MAX_MODULES 32 414 415 416 /************************************************************************** 417 * 418 * Debug level 419 * 420 * FreeType can be compiled in debug or trace mode. In debug mode, 421 * errors are reported through the 'ftdebug' component. In trace mode, 422 * additional messages are sent to the standard output during execution. 423 * 424 * Define `FT_DEBUG_LEVEL_ERROR` to build the library in debug mode. 425 * Define `FT_DEBUG_LEVEL_TRACE` to build it in trace mode. 426 * 427 * Don't define any of these macros to compile in 'release' mode! 428 * 429 * Do not `#undef` these macros here since the build system might define 430 * them for certain configurations only. 431 */ 432 /* #define FT_DEBUG_LEVEL_ERROR */ 433 /* #define FT_DEBUG_LEVEL_TRACE */ 434 435 436 /************************************************************************** 437 * 438 * Logging 439 * 440 * Compiling FreeType in debug or trace mode makes FreeType write error 441 * and trace log messages to `stderr`. Enabling this macro 442 * automatically forces the `FT_DEBUG_LEVEL_ERROR` and 443 * `FT_DEBUG_LEVEL_TRACE` macros and allows FreeType to write error and 444 * trace log messages to a file instead of `stderr`. For writing logs 445 * to a file, FreeType uses an the external `dlg` library (the source 446 * code is in `src/dlg`). 447 * 448 * This option needs a C99 compiler. 449 */ 450 /* #define FT_DEBUG_LOGGING */ 451 452 453 /************************************************************************** 454 * 455 * Autofitter debugging 456 * 457 * If `FT_DEBUG_AUTOFIT` is defined, FreeType provides some means to 458 * control the autofitter behaviour for debugging purposes with global 459 * boolean variables (consequently, you should **never** enable this 460 * while compiling in 'release' mode): 461 * 462 * ``` 463 * _af_debug_disable_horz_hints 464 * _af_debug_disable_vert_hints 465 * _af_debug_disable_blue_hints 466 * ``` 467 * 468 * Additionally, the following functions provide dumps of various 469 * internal autofit structures to stdout (using `printf`): 470 * 471 * ``` 472 * af_glyph_hints_dump_points 473 * af_glyph_hints_dump_segments 474 * af_glyph_hints_dump_edges 475 * af_glyph_hints_get_num_segments 476 * af_glyph_hints_get_segment_offset 477 * ``` 478 * 479 * As an argument, they use another global variable: 480 * 481 * ``` 482 * _af_debug_hints 483 * ``` 484 * 485 * Please have a look at the `ftgrid` demo program to see how those 486 * variables and macros should be used. 487 * 488 * Do not `#undef` these macros here since the build system might define 489 * them for certain configurations only. 490 */ 491 /* #define FT_DEBUG_AUTOFIT */ 492 493 494 /************************************************************************** 495 * 496 * Memory Debugging 497 * 498 * FreeType now comes with an integrated memory debugger that is capable 499 * of detecting simple errors like memory leaks or double deletes. To 500 * compile it within your build of the library, you should define 501 * `FT_DEBUG_MEMORY` here. 502 * 503 * Note that the memory debugger is only activated at runtime when when 504 * the _environment_ variable `FT2_DEBUG_MEMORY` is defined also! 505 * 506 * Do not `#undef` this macro here since the build system might define it 507 * for certain configurations only. 508 */ 509 /* #define FT_DEBUG_MEMORY */ 510 511 512 /************************************************************************** 513 * 514 * Module errors 515 * 516 * If this macro is set (which is _not_ the default), the higher byte of 517 * an error code gives the module in which the error has occurred, while 518 * the lower byte is the real error code. 519 * 520 * Setting this macro makes sense for debugging purposes only, since it 521 * would break source compatibility of certain programs that use 522 * FreeType~2. 523 * 524 * More details can be found in the files `ftmoderr.h` and `fterrors.h`. 525 */ 526 #undef FT_CONFIG_OPTION_USE_MODULE_ERRORS 527 528 529 /************************************************************************** 530 * 531 * Error Strings 532 * 533 * If this macro is set, `FT_Error_String` will return meaningful 534 * descriptions. This is not enabled by default to reduce the overall 535 * size of FreeType. 536 * 537 * More details can be found in the file `fterrors.h`. 538 */ 539 /* #define FT_CONFIG_OPTION_ERROR_STRINGS */ 540 541 542 /*************************************************************************/ 543 /*************************************************************************/ 544 /**** ****/ 545 /**** S F N T D R I V E R C O N F I G U R A T I O N ****/ 546 /**** ****/ 547 /*************************************************************************/ 548 /*************************************************************************/ 549 550 551 /************************************************************************** 552 * 553 * Define `TT_CONFIG_OPTION_EMBEDDED_BITMAPS` if you want to support 554 * embedded bitmaps in all formats using the 'sfnt' module (namely 555 * TrueType~& OpenType). 556 */ 557 #define TT_CONFIG_OPTION_EMBEDDED_BITMAPS 558 559 560 /************************************************************************** 561 * 562 * Define `TT_CONFIG_OPTION_COLOR_LAYERS` if you want to support colored 563 * outlines (from the 'COLR'/'CPAL' tables) in all formats using the 'sfnt' 564 * module (namely TrueType~& OpenType). 565 */ 566 #define TT_CONFIG_OPTION_COLOR_LAYERS 567 568 569 /************************************************************************** 570 * 571 * Define `TT_CONFIG_OPTION_POSTSCRIPT_NAMES` if you want to be able to 572 * load and enumerate the glyph Postscript names in a TrueType or OpenType 573 * file. 574 * 575 * Note that when you do not compile the 'psnames' module by undefining the 576 * above `FT_CONFIG_OPTION_POSTSCRIPT_NAMES`, the 'sfnt' module will 577 * contain additional code used to read the PS Names table from a font. 578 * 579 * (By default, the module uses 'psnames' to extract glyph names.) 580 */ 581 #define TT_CONFIG_OPTION_POSTSCRIPT_NAMES 582 583 584 /************************************************************************** 585 * 586 * Define `TT_CONFIG_OPTION_SFNT_NAMES` if your applications need to access 587 * the internal name table in a SFNT-based format like TrueType or 588 * OpenType. The name table contains various strings used to describe the 589 * font, like family name, copyright, version, etc. It does not contain 590 * any glyph name though. 591 * 592 * Accessing SFNT names is done through the functions declared in 593 * `ftsnames.h`. 594 */ 595 #define TT_CONFIG_OPTION_SFNT_NAMES 596 597 598 /************************************************************************** 599 * 600 * TrueType CMap support 601 * 602 * Here you can fine-tune which TrueType CMap table format shall be 603 * supported. 604 */ 605 #define TT_CONFIG_CMAP_FORMAT_0 606 #define TT_CONFIG_CMAP_FORMAT_2 607 #define TT_CONFIG_CMAP_FORMAT_4 608 #define TT_CONFIG_CMAP_FORMAT_6 609 #define TT_CONFIG_CMAP_FORMAT_8 610 #define TT_CONFIG_CMAP_FORMAT_10 611 #define TT_CONFIG_CMAP_FORMAT_12 612 #define TT_CONFIG_CMAP_FORMAT_13 613 #define TT_CONFIG_CMAP_FORMAT_14 614 615 616 /*************************************************************************/ 617 /*************************************************************************/ 618 /**** ****/ 619 /**** 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 ****/ 620 /**** ****/ 621 /*************************************************************************/ 622 /*************************************************************************/ 623 624 /************************************************************************** 625 * 626 * Define `TT_CONFIG_OPTION_BYTECODE_INTERPRETER` if you want to compile a 627 * bytecode interpreter in the TrueType driver. 628 * 629 * By undefining this, you will only compile the code necessary to load 630 * TrueType glyphs without hinting. 631 * 632 * Do not `#undef` this macro here, since the build system might define it 633 * for certain configurations only. 634 */ 635 #define TT_CONFIG_OPTION_BYTECODE_INTERPRETER 636 637 638 /************************************************************************** 639 * 640 * Define `TT_CONFIG_OPTION_SUBPIXEL_HINTING` if you want to compile 641 * subpixel hinting support into the TrueType driver. This modifies the 642 * TrueType hinting mechanism when anything but `FT_RENDER_MODE_MONO` is 643 * requested. 644 * 645 * In particular, it modifies the bytecode interpreter to interpret (or 646 * not) instructions in a certain way so that all TrueType fonts look like 647 * they do in a Windows ClearType (DirectWrite) environment. See [1] for a 648 * technical overview on what this means. See `ttinterp.h` for more 649 * details on the LEAN option. 650 * 651 * There are three possible values. 652 * 653 * Value 1: 654 * This value is associated with the 'Infinality' moniker, contributed by 655 * an individual nicknamed Infinality with the goal of making TrueType 656 * fonts render better than on Windows. A high amount of configurability 657 * and flexibility, down to rules for single glyphs in fonts, but also 658 * very slow. Its experimental and slow nature and the original 659 * developer losing interest meant that this option was never enabled in 660 * default builds. 661 * 662 * The corresponding interpreter version is v38. 663 * 664 * Value 2: 665 * The new default mode for the TrueType driver. The Infinality code 666 * base was stripped to the bare minimum and all configurability removed 667 * in the name of speed and simplicity. The configurability was mainly 668 * aimed at legacy fonts like 'Arial', 'Times New Roman', or 'Courier'. 669 * Legacy fonts are fonts that modify vertical stems to achieve clean 670 * black-and-white bitmaps. The new mode focuses on applying a minimal 671 * set of rules to all fonts indiscriminately so that modern and web 672 * fonts render well while legacy fonts render okay. 673 * 674 * The corresponding interpreter version is v40. 675 * 676 * Value 3: 677 * Compile both, making both v38 and v40 available (the latter is the 678 * default). 679 * 680 * By undefining these, you get rendering behavior like on Windows without 681 * ClearType, i.e., Windows XP without ClearType enabled and Win9x 682 * (interpreter version v35). Or not, depending on how much hinting blood 683 * and testing tears the font designer put into a given font. If you 684 * define one or both subpixel hinting options, you can switch between 685 * between v35 and the ones you define (using `FT_Property_Set`). 686 * 687 * This option requires `TT_CONFIG_OPTION_BYTECODE_INTERPRETER` to be 688 * defined. 689 * 690 * [1] 691 * https://www.microsoft.com/typography/cleartype/truetypecleartype.aspx 692 */ 693 /* #define TT_CONFIG_OPTION_SUBPIXEL_HINTING 1 */ 694 695 /* ANDROID: disabled */ 696 /* #define TT_CONFIG_OPTION_SUBPIXEL_HINTING 2 */ 697 698 /* #define TT_CONFIG_OPTION_SUBPIXEL_HINTING ( 1 | 2 ) */ 699 700 701 /************************************************************************** 702 * 703 * Define `TT_CONFIG_OPTION_COMPONENT_OFFSET_SCALED` to compile the 704 * TrueType glyph loader to use Apple's definition of how to handle 705 * component offsets in composite glyphs. 706 * 707 * Apple and MS disagree on the default behavior of component offsets in 708 * composites. Apple says that they should be scaled by the scaling 709 * factors in the transformation matrix (roughly, it's more complex) while 710 * MS says they should not. OpenType defines two bits in the composite 711 * flags array which can be used to disambiguate, but old fonts will not 712 * have them. 713 * 714 * https://www.microsoft.com/typography/otspec/glyf.htm 715 * https://developer.apple.com/fonts/TrueType-Reference-Manual/RM06/Chap6glyf.html 716 */ 717 #undef TT_CONFIG_OPTION_COMPONENT_OFFSET_SCALED 718 719 720 /************************************************************************** 721 * 722 * Define `TT_CONFIG_OPTION_GX_VAR_SUPPORT` if you want to include support 723 * for Apple's distortable font technology ('fvar', 'gvar', 'cvar', and 724 * 'avar' tables). Tagged 'Font Variations', this is now part of OpenType 725 * also. This has many similarities to Type~1 Multiple Masters support. 726 */ 727 #define TT_CONFIG_OPTION_GX_VAR_SUPPORT 728 729 730 /************************************************************************** 731 * 732 * Define `TT_CONFIG_OPTION_BDF` if you want to include support for an 733 * embedded 'BDF~' table within SFNT-based bitmap formats. 734 */ 735 #define TT_CONFIG_OPTION_BDF 736 737 738 /************************************************************************** 739 * 740 * Option `TT_CONFIG_OPTION_MAX_RUNNABLE_OPCODES` controls the maximum 741 * number of bytecode instructions executed for a single run of the 742 * bytecode interpreter, needed to prevent infinite loops. You don't want 743 * to change this except for very special situations (e.g., making a 744 * library fuzzer spend less time to handle broken fonts). 745 * 746 * It is not expected that this value is ever modified by a configuring 747 * script; instead, it gets surrounded with `#ifndef ... #endif` so that 748 * the value can be set as a preprocessor option on the compiler's command 749 * line. 750 */ 751 #ifndef TT_CONFIG_OPTION_MAX_RUNNABLE_OPCODES 752 #define TT_CONFIG_OPTION_MAX_RUNNABLE_OPCODES 1000000L 753 #endif 754 755 756 /*************************************************************************/ 757 /*************************************************************************/ 758 /**** ****/ 759 /**** T Y P E 1 D R I V E R C O N F I G U R A T I O N ****/ 760 /**** ****/ 761 /*************************************************************************/ 762 /*************************************************************************/ 763 764 765 /************************************************************************** 766 * 767 * `T1_MAX_DICT_DEPTH` is the maximum depth of nest dictionaries and arrays 768 * in the Type~1 stream (see `t1load.c`). A minimum of~4 is required. 769 */ 770 #define T1_MAX_DICT_DEPTH 5 771 772 773 /************************************************************************** 774 * 775 * `T1_MAX_SUBRS_CALLS` details the maximum number of nested sub-routine 776 * calls during glyph loading. 777 */ 778 #define T1_MAX_SUBRS_CALLS 16 779 780 781 /************************************************************************** 782 * 783 * `T1_MAX_CHARSTRING_OPERANDS` is the charstring stack's capacity. A 784 * minimum of~16 is required. 785 * 786 * The Chinese font 'MingTiEG-Medium' (covering the CNS 11643 character 787 * set) needs 256. 788 */ 789 #define T1_MAX_CHARSTRINGS_OPERANDS 256 790 791 792 /************************************************************************** 793 * 794 * Define this configuration macro if you want to prevent the compilation 795 * of the 't1afm' module, which is in charge of reading Type~1 AFM files 796 * into an existing face. Note that if set, the Type~1 driver will be 797 * unable to produce kerning distances. 798 */ 799 #undef T1_CONFIG_OPTION_NO_AFM 800 801 802 /************************************************************************** 803 * 804 * Define this configuration macro if you want to prevent the compilation 805 * of the Multiple Masters font support in the Type~1 driver. 806 */ 807 #undef T1_CONFIG_OPTION_NO_MM_SUPPORT 808 809 810 /************************************************************************** 811 * 812 * `T1_CONFIG_OPTION_OLD_ENGINE` controls whether the pre-Adobe Type~1 813 * engine gets compiled into FreeType. If defined, it is possible to 814 * switch between the two engines using the `hinting-engine` property of 815 * the 'type1' driver module. 816 */ 817 /* #define T1_CONFIG_OPTION_OLD_ENGINE */ 818 819 820 /*************************************************************************/ 821 /*************************************************************************/ 822 /**** ****/ 823 /**** C F F D R I V E R C O N F I G U R A T I O N ****/ 824 /**** ****/ 825 /*************************************************************************/ 826 /*************************************************************************/ 827 828 829 /************************************************************************** 830 * 831 * Using `CFF_CONFIG_OPTION_DARKENING_PARAMETER_{X,Y}{1,2,3,4}` it is 832 * possible to set up the default values of the four control points that 833 * define the stem darkening behaviour of the (new) CFF engine. For more 834 * details please read the documentation of the `darkening-parameters` 835 * property (file `ftdriver.h`), which allows the control at run-time. 836 * 837 * Do **not** undefine these macros! 838 */ 839 #define CFF_CONFIG_OPTION_DARKENING_PARAMETER_X1 500 840 #define CFF_CONFIG_OPTION_DARKENING_PARAMETER_Y1 400 841 842 #define CFF_CONFIG_OPTION_DARKENING_PARAMETER_X2 1000 843 #define CFF_CONFIG_OPTION_DARKENING_PARAMETER_Y2 275 844 845 #define CFF_CONFIG_OPTION_DARKENING_PARAMETER_X3 1667 846 #define CFF_CONFIG_OPTION_DARKENING_PARAMETER_Y3 275 847 848 #define CFF_CONFIG_OPTION_DARKENING_PARAMETER_X4 2333 849 #define CFF_CONFIG_OPTION_DARKENING_PARAMETER_Y4 0 850 851 852 /************************************************************************** 853 * 854 * `CFF_CONFIG_OPTION_OLD_ENGINE` controls whether the pre-Adobe CFF engine 855 * gets compiled into FreeType. If defined, it is possible to switch 856 * between the two engines using the `hinting-engine` property of the 'cff' 857 * driver module. 858 */ 859 /* #define CFF_CONFIG_OPTION_OLD_ENGINE */ 860 861 862 /*************************************************************************/ 863 /*************************************************************************/ 864 /**** ****/ 865 /**** P C F D R I V E R C O N F I G U R A T I O N ****/ 866 /**** ****/ 867 /*************************************************************************/ 868 /*************************************************************************/ 869 870 871 /************************************************************************** 872 * 873 * There are many PCF fonts just called 'Fixed' which look completely 874 * different, and which have nothing to do with each other. When selecting 875 * 'Fixed' in KDE or Gnome one gets results that appear rather random, the 876 * style changes often if one changes the size and one cannot select some 877 * fonts at all. This option makes the 'pcf' module prepend the foundry 878 * name (plus a space) to the family name. 879 * 880 * We also check whether we have 'wide' characters; all put together, we 881 * get family names like 'Sony Fixed' or 'Misc Fixed Wide'. 882 * 883 * If this option is activated, it can be controlled with the 884 * `no-long-family-names` property of the 'pcf' driver module. 885 */ 886 /* #define PCF_CONFIG_OPTION_LONG_FAMILY_NAMES */ 887 888 889 /*************************************************************************/ 890 /*************************************************************************/ 891 /**** ****/ 892 /**** 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 ****/ 893 /**** ****/ 894 /*************************************************************************/ 895 /*************************************************************************/ 896 897 898 /************************************************************************** 899 * 900 * Compile 'autofit' module with CJK (Chinese, Japanese, Korean) script 901 * support. 902 */ 903 #define AF_CONFIG_OPTION_CJK 904 905 906 /************************************************************************** 907 * 908 * Compile 'autofit' module with fallback Indic script support, covering 909 * some scripts that the 'latin' submodule of the 'autofit' module doesn't 910 * (yet) handle. Currently, this needs option `AF_CONFIG_OPTION_CJK`. 911 */ 912 #ifdef AF_CONFIG_OPTION_CJK 913 #define AF_CONFIG_OPTION_INDIC 914 #endif 915 916 917 /************************************************************************** 918 * 919 * Use TrueType-like size metrics for 'light' auto-hinting. 920 * 921 * It is strongly recommended to avoid this option, which exists only to 922 * help some legacy applications retain its appearance and behaviour with 923 * respect to auto-hinted TrueType fonts. 924 * 925 * The very reason this option exists at all are GNU/Linux distributions 926 * like Fedora that did not un-patch the following change (which was 927 * present in FreeType between versions 2.4.6 and 2.7.1, inclusive). 928 * 929 * ``` 930 * 2011-07-16 Steven Chu <steven.f.chu@gmail.com> 931 * 932 * [truetype] Fix metrics on size request for scalable fonts. 933 * ``` 934 * 935 * This problematic commit is now reverted (more or less). 936 */ 937 /* #define AF_CONFIG_OPTION_TT_SIZE_METRICS */ 938 939 /* */ 940 941 942 /* 943 * This macro is obsolete. Support has been removed in FreeType version 944 * 2.5. 945 */ 946 /* #define FT_CONFIG_OPTION_OLD_INTERNALS */ 947 948 949 /* 950 * The next three macros are defined if native TrueType hinting is 951 * requested by the definitions above. Don't change this. 952 */ 953 #ifdef TT_CONFIG_OPTION_BYTECODE_INTERPRETER 954 #define TT_USE_BYTECODE_INTERPRETER 955 956 #ifdef TT_CONFIG_OPTION_SUBPIXEL_HINTING 957 #if TT_CONFIG_OPTION_SUBPIXEL_HINTING & 1 958 #define TT_SUPPORT_SUBPIXEL_HINTING_INFINALITY 959 #endif 960 961 #if TT_CONFIG_OPTION_SUBPIXEL_HINTING & 2 962 #define TT_SUPPORT_SUBPIXEL_HINTING_MINIMAL 963 #endif 964 #endif 965 #endif 966 967 968 /* 969 * The TT_SUPPORT_COLRV1 macro is defined to indicate to clients that this 970 * version of FreeType has support for 'COLR' v1 API. This definition is 971 * useful to FreeType clients that want to build in support for 'COLR' v1 972 * depending on a tip-of-tree checkout before it is officially released in 973 * FreeType, and while the feature cannot yet be tested against using 974 * version macros. Don't change this macro. This may be removed once the 975 * feature is in a FreeType release version and version macros can be used 976 * to test for availability. 977 */ 978 #ifdef TT_CONFIG_OPTION_COLOR_LAYERS 979 #define TT_SUPPORT_COLRV1 980 #endif 981 982 983 /* 984 * Check CFF darkening parameters. The checks are the same as in function 985 * `cff_property_set` in file `cffdrivr.c`. 986 */ 987 #if CFF_CONFIG_OPTION_DARKENING_PARAMETER_X1 < 0 || \ 988 CFF_CONFIG_OPTION_DARKENING_PARAMETER_X2 < 0 || \ 989 CFF_CONFIG_OPTION_DARKENING_PARAMETER_X3 < 0 || \ 990 CFF_CONFIG_OPTION_DARKENING_PARAMETER_X4 < 0 || \ 991 \ 992 CFF_CONFIG_OPTION_DARKENING_PARAMETER_Y1 < 0 || \ 993 CFF_CONFIG_OPTION_DARKENING_PARAMETER_Y2 < 0 || \ 994 CFF_CONFIG_OPTION_DARKENING_PARAMETER_Y3 < 0 || \ 995 CFF_CONFIG_OPTION_DARKENING_PARAMETER_Y4 < 0 || \ 996 \ 997 CFF_CONFIG_OPTION_DARKENING_PARAMETER_X1 > \ 998 CFF_CONFIG_OPTION_DARKENING_PARAMETER_X2 || \ 999 CFF_CONFIG_OPTION_DARKENING_PARAMETER_X2 > \ 1000 CFF_CONFIG_OPTION_DARKENING_PARAMETER_X3 || \ 1001 CFF_CONFIG_OPTION_DARKENING_PARAMETER_X3 > \ 1002 CFF_CONFIG_OPTION_DARKENING_PARAMETER_X4 || \ 1003 \ 1004 CFF_CONFIG_OPTION_DARKENING_PARAMETER_Y1 > 500 || \ 1005 CFF_CONFIG_OPTION_DARKENING_PARAMETER_Y2 > 500 || \ 1006 CFF_CONFIG_OPTION_DARKENING_PARAMETER_Y3 > 500 || \ 1007 CFF_CONFIG_OPTION_DARKENING_PARAMETER_Y4 > 500 1008 #error "Invalid CFF darkening parameters!" 1009 #endif 1010 1011 FT_END_HEADER 1012 1013 1014 #endif /* FTOPTION_H_ */ 1015 1016 1017 /* END */ 1018