1 /**************************************************************************** 2 * 3 * ftoption.h 4 * 5 * User-selectable configuration macros (specification only). 6 * 7 * Copyright (C) 1996-2022 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 #ifndef FTOPTION_H_ 19 #define FTOPTION_H_ 20 21 #include <ft2build.h> 22 23 FT_BEGIN_HEADER 24 25 /************************************************************************** 26 * 27 * USER-SELECTABLE CONFIGURATION MACROS 28 * 29 * This file contains the default configuration macro definitions for a 30 * standard build of the FreeType library. There are three ways to use 31 * this file to build project-specific versions of the library: 32 * 33 * - You can modify this file by hand, but this is not recommended in 34 * cases where you would like to build several versions of the library 35 * from a single source directory. 36 * 37 * - You can put a copy of this file in your build directory, more 38 * precisely in `$BUILD/freetype/config/ftoption.h`, where `$BUILD` is 39 * the name of a directory that is included _before_ the FreeType include 40 * path during compilation. 41 * 42 * The default FreeType Makefiles use the build directory 43 * `builds/<system>` by default, but you can easily change that for your 44 * own projects. 45 * 46 * - Copy the file <ft2build.h> to `$BUILD/ft2build.h` and modify it 47 * slightly to pre-define the macro `FT_CONFIG_OPTIONS_H` used to locate 48 * this file during the build. For example, 49 * 50 * ``` 51 * #define FT_CONFIG_OPTIONS_H <myftoptions.h> 52 * #include <freetype/config/ftheader.h> 53 * ``` 54 * 55 * will use `$BUILD/myftoptions.h` instead of this file for macro 56 * definitions. 57 * 58 * Note also that you can similarly pre-define the macro 59 * `FT_CONFIG_MODULES_H` used to locate the file listing of the modules 60 * that are statically linked to the library at compile time. By 61 * default, this file is `<freetype/config/ftmodule.h>`. 62 * 63 * We highly recommend using the third method whenever possible. 64 * 65 */ 66 67 /*************************************************************************/ 68 /*************************************************************************/ 69 /**** ****/ 70 /**** 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 ****/ 71 /**** ****/ 72 /*************************************************************************/ 73 /*************************************************************************/ 74 75 /*#************************************************************************ 76 * 77 * If you enable this configuration option, FreeType recognizes an 78 * environment variable called `FREETYPE_PROPERTIES`, which can be used to 79 * control the various font drivers and modules. The controllable 80 * properties are listed in the section @properties. 81 * 82 * You have to undefine this configuration option on platforms that lack 83 * the concept of environment variables (and thus don't have the `getenv` 84 * function), for example Windows CE. 85 * 86 * `FREETYPE_PROPERTIES` has the following syntax form (broken here into 87 * multiple lines for better readability). 88 * 89 * ``` 90 * <optional whitespace> 91 * <module-name1> ':' 92 * <property-name1> '=' <property-value1> 93 * <whitespace> 94 * <module-name2> ':' 95 * <property-name2> '=' <property-value2> 96 * ... 97 * ``` 98 * 99 * Example: 100 * 101 * ``` 102 * FREETYPE_PROPERTIES=truetype:interpreter-version=35 \ 103 * cff:no-stem-darkening=1 104 * ``` 105 * 106 */ 107 #define FT_CONFIG_OPTION_ENVIRONMENT_PROPERTIES 108 109 /************************************************************************** 110 * 111 * Uncomment the line below if you want to activate LCD rendering 112 * technology similar to ClearType in this build of the library. This 113 * technology triples the resolution in the direction color subpixels. To 114 * mitigate color fringes inherent to this technology, you also need to 115 * explicitly set up LCD filtering. 116 * 117 * When this macro is not defined, FreeType offers alternative LCD 118 * rendering technology that produces excellent output. 119 */ 120 /* #define FT_CONFIG_OPTION_SUBPIXEL_RENDERING */ 121 122 /************************************************************************** 123 * 124 * Many compilers provide a non-ANSI 64-bit data type that can be used by 125 * FreeType to speed up some computations. However, this will create some 126 * problems when compiling the library in strict ANSI mode. 127 * 128 * For this reason, the use of 64-bit integers is normally disabled when 129 * the `__STDC__` macro is defined. You can however disable this by 130 * defining the macro `FT_CONFIG_OPTION_FORCE_INT64` here. 131 * 132 * For most compilers, this will only create compilation warnings when 133 * building the library. 134 * 135 * ObNote: The compiler-specific 64-bit integers are detected in the 136 * file `ftconfig.h` either statically or through the `configure` 137 * script on supported platforms. 138 */ 139 #undef FT_CONFIG_OPTION_FORCE_INT64 140 141 /************************************************************************** 142 * 143 * If this macro is defined, do not try to use an assembler version of 144 * performance-critical functions (e.g., @FT_MulFix). You should only do 145 * that to verify that the assembler function works properly, or to execute 146 * benchmark tests of the various implementations. 147 */ 148 /* #define FT_CONFIG_OPTION_NO_ASSEMBLER */ 149 150 /************************************************************************** 151 * 152 * If this macro is defined, try to use an inlined assembler version of the 153 * @FT_MulFix function, which is a 'hotspot' when loading and hinting 154 * glyphs, and which should be executed as fast as possible. 155 * 156 * Note that if your compiler or CPU is not supported, this will default to 157 * the standard and portable implementation found in `ftcalc.c`. 158 */ 159 #define FT_CONFIG_OPTION_INLINE_MULFIX 160 161 /************************************************************************** 162 * 163 * LZW-compressed file support. 164 * 165 * FreeType now handles font files that have been compressed with the 166 * `compress` program. This is mostly used to parse many of the PCF 167 * files that come with various X11 distributions. The implementation 168 * uses NetBSD's `zopen` to partially uncompress the file on the fly (see 169 * `src/lzw/ftgzip.c`). 170 * 171 * Define this macro if you want to enable this 'feature'. 172 */ 173 #define FT_CONFIG_OPTION_USE_LZW 174 175 /************************************************************************** 176 * 177 * Gzip-compressed file support. 178 * 179 * FreeType now handles font files that have been compressed with the 180 * `gzip` program. This is mostly used to parse many of the PCF files 181 * that come with XFree86. The implementation uses 'zlib' to partially 182 * uncompress the file on the fly (see `src/gzip/ftgzip.c`). 183 * 184 * Define this macro if you want to enable this 'feature'. See also the 185 * macro `FT_CONFIG_OPTION_SYSTEM_ZLIB` below. 186 */ 187 #define FT_CONFIG_OPTION_USE_ZLIB 188 189 /************************************************************************** 190 * 191 * ZLib library selection 192 * 193 * This macro is only used when `FT_CONFIG_OPTION_USE_ZLIB` is defined. 194 * It allows FreeType's 'ftgzip' component to link to the system's 195 * installation of the ZLib library. This is useful on systems like 196 * Unix or VMS where it generally is already available. 197 * 198 * If you let it undefined, the component will use its own copy of the 199 * zlib sources instead. These have been modified to be included 200 * directly within the component and **not** export external function 201 * names. This allows you to link any program with FreeType _and_ ZLib 202 * without linking conflicts. 203 * 204 * Do not `#undef` this macro here since the build system might define 205 * it for certain configurations only. 206 * 207 * If you use a build system like cmake or the `configure` script, 208 * options set by those programs have precedence, overwriting the value 209 * here with the configured one. 210 * 211 * If you use the GNU make build system directly (that is, without the 212 * `configure` script) and you define this macro, you also have to pass 213 * `SYSTEM_ZLIB=yes` as an argument to make. 214 */ 215 /* #define FT_CONFIG_OPTION_SYSTEM_ZLIB */ 216 217 /************************************************************************** 218 * 219 * Bzip2-compressed file support. 220 * 221 * FreeType now handles font files that have been compressed with the 222 * `bzip2` program. This is mostly used to parse many of the PCF files 223 * that come with XFree86. The implementation uses `libbz2` to partially 224 * uncompress the file on the fly (see `src/bzip2/ftbzip2.c`). Contrary 225 * to gzip, bzip2 currently is not included and need to use the system 226 * available bzip2 implementation. 227 * 228 * Define this macro if you want to enable this 'feature'. 229 * 230 * If you use a build system like cmake or the `configure` script, 231 * options set by those programs have precedence, overwriting the value 232 * here with the configured one. 233 */ 234 /* #define FT_CONFIG_OPTION_USE_BZIP2 */ 235 236 /************************************************************************** 237 * 238 * Define to disable the use of file stream functions and types, `FILE`, 239 * `fopen`, etc. Enables the use of smaller system libraries on embedded 240 * systems that have multiple system libraries, some with or without file 241 * stream support, in the cases where file stream support is not necessary 242 * such as memory loading of font files. 243 */ 244 /* #define FT_CONFIG_OPTION_DISABLE_STREAM_SUPPORT */ 245 246 /************************************************************************** 247 * 248 * PNG bitmap support. 249 * 250 * FreeType now handles loading color bitmap glyphs in the PNG format. 251 * This requires help from the external libpng library. Uncompressed 252 * color bitmaps do not need any external libraries and will be supported 253 * regardless of this configuration. 254 * 255 * Define this macro if you want to enable this 'feature'. 256 * 257 * If you use a build system like cmake or the `configure` script, 258 * options set by those programs have precedence, overwriting the value 259 * here with the configured one. 260 */ 261 #define FT_CONFIG_OPTION_USE_PNG 262 263 /************************************************************************** 264 * 265 * HarfBuzz support. 266 * 267 * FreeType uses the HarfBuzz library to improve auto-hinting of OpenType 268 * fonts. If available, many glyphs not directly addressable by a font's 269 * character map will be hinted also. 270 * 271 * Define this macro if you want to enable this 'feature'. 272 * 273 * If you use a build system like cmake or the `configure` script, 274 * options set by those programs have precedence, overwriting the value 275 * here with the configured one. 276 */ 277 /* #define FT_CONFIG_OPTION_USE_HARFBUZZ */ 278 279 /************************************************************************** 280 * 281 * Brotli support. 282 * 283 * FreeType uses the Brotli library to provide support for decompressing 284 * WOFF2 streams. 285 * 286 * Define this macro if you want to enable this 'feature'. 287 * 288 * If you use a build system like cmake or the `configure` script, 289 * options set by those programs have precedence, overwriting the value 290 * here with the configured one. 291 */ 292 /* #define FT_CONFIG_OPTION_USE_BROTLI */ 293 294 /************************************************************************** 295 * 296 * Glyph Postscript Names handling 297 * 298 * By default, FreeType 2 is compiled with the 'psnames' module. This 299 * module is in charge of converting a glyph name string into a Unicode 300 * value, or return a Macintosh standard glyph name for the use with the 301 * TrueType 'post' table. 302 * 303 * Undefine this macro if you do not want 'psnames' compiled in your 304 * build of FreeType. This has the following effects: 305 * 306 * - The TrueType driver will provide its own set of glyph names, if you 307 * build it to support postscript names in the TrueType 'post' table, 308 * but will not synthesize a missing Unicode charmap. 309 * 310 * - The Type~1 driver will not be able to synthesize a Unicode charmap 311 * out of the glyphs found in the fonts. 312 * 313 * You would normally undefine this configuration macro when building a 314 * version of FreeType that doesn't contain a Type~1 or CFF driver. 315 */ 316 #define FT_CONFIG_OPTION_POSTSCRIPT_NAMES 317 318 /************************************************************************** 319 * 320 * Postscript Names to Unicode Values support 321 * 322 * By default, FreeType~2 is built with the 'psnames' module compiled in. 323 * Among other things, the module is used to convert a glyph name into a 324 * Unicode value. This is especially useful in order to synthesize on 325 * the fly a Unicode charmap from the CFF/Type~1 driver through a big 326 * table named the 'Adobe Glyph List' (AGL). 327 * 328 * Undefine this macro if you do not want the Adobe Glyph List compiled 329 * in your 'psnames' module. The Type~1 driver will not be able to 330 * synthesize a Unicode charmap out of the glyphs found in the fonts. 331 */ 332 #define FT_CONFIG_OPTION_ADOBE_GLYPH_LIST 333 334 /************************************************************************** 335 * 336 * Support for Mac fonts 337 * 338 * Define this macro if you want support for outline fonts in Mac format 339 * (mac dfont, mac resource, macbinary containing a mac resource) on 340 * non-Mac platforms. 341 * 342 * Note that the 'FOND' resource isn't checked. 343 */ 344 /* #define FT_CONFIG_OPTION_MAC_FONTS */ 345 346 /************************************************************************** 347 * 348 * Guessing methods to access embedded resource forks 349 * 350 * Enable extra Mac fonts support on non-Mac platforms (e.g., GNU/Linux). 351 * 352 * Resource forks which include fonts data are stored sometimes in 353 * locations which users or developers don't expected. In some cases, 354 * resource forks start with some offset from the head of a file. In 355 * other cases, the actual resource fork is stored in file different from 356 * what the user specifies. If this option is activated, FreeType tries 357 * to guess whether such offsets or different file names must be used. 358 * 359 * Note that normal, direct access of resource forks is controlled via 360 * the `FT_CONFIG_OPTION_MAC_FONTS` option. 361 */ 362 #ifdef FT_CONFIG_OPTION_MAC_FONTS 363 #define FT_CONFIG_OPTION_GUESSING_EMBEDDED_RFORK 364 #endif 365 366 /************************************************************************** 367 * 368 * Allow the use of `FT_Incremental_Interface` to load typefaces that 369 * contain no glyph data, but supply it via a callback function. This is 370 * required by clients supporting document formats which supply font data 371 * incrementally as the document is parsed, such as the Ghostscript 372 * interpreter for the PostScript language. 373 */ 374 #define FT_CONFIG_OPTION_INCREMENTAL 375 376 /************************************************************************** 377 * 378 * The size in bytes of the render pool used by the scan-line converter to 379 * do all of its work. 380 */ 381 #define FT_RENDER_POOL_SIZE 16384L 382 383 /************************************************************************** 384 * 385 * FT_MAX_MODULES 386 * 387 * The maximum number of modules that can be registered in a single 388 * FreeType library object. 32~is the default. 389 */ 390 #define FT_MAX_MODULES 32 391 392 /************************************************************************** 393 * 394 * Debug level 395 * 396 * FreeType can be compiled in debug or trace mode. In debug mode, 397 * errors are reported through the 'ftdebug' component. In trace mode, 398 * additional messages are sent to the standard output during execution. 399 * 400 * Define `FT_DEBUG_LEVEL_ERROR` to build the library in debug mode. 401 * Define `FT_DEBUG_LEVEL_TRACE` to build it in trace mode. 402 * 403 * Don't define any of these macros to compile in 'release' mode! 404 * 405 * Do not `#undef` these macros here since the build system might define 406 * them for certain configurations only. 407 */ 408 /* #define FT_DEBUG_LEVEL_ERROR */ 409 /* #define FT_DEBUG_LEVEL_TRACE */ 410 411 /************************************************************************** 412 * 413 * Logging 414 * 415 * Compiling FreeType in debug or trace mode makes FreeType write error 416 * and trace log messages to `stderr`. Enabling this macro 417 * automatically forces the `FT_DEBUG_LEVEL_ERROR` and 418 * `FT_DEBUG_LEVEL_TRACE` macros and allows FreeType to write error and 419 * trace log messages to a file instead of `stderr`. For writing logs 420 * to a file, FreeType uses an the external `dlg` library (the source 421 * code is in `src/dlg`). 422 * 423 * This option needs a C99 compiler. 424 */ 425 /* #define FT_DEBUG_LOGGING */ 426 427 /************************************************************************** 428 * 429 * Autofitter debugging 430 * 431 * If `FT_DEBUG_AUTOFIT` is defined, FreeType provides some means to 432 * control the autofitter behaviour for debugging purposes with global 433 * boolean variables (consequently, you should **never** enable this 434 * while compiling in 'release' mode): 435 * 436 * ``` 437 * _af_debug_disable_horz_hints 438 * _af_debug_disable_vert_hints 439 * _af_debug_disable_blue_hints 440 * ``` 441 * 442 * Additionally, the following functions provide dumps of various 443 * internal autofit structures to stdout (using `printf`): 444 * 445 * ``` 446 * af_glyph_hints_dump_points 447 * af_glyph_hints_dump_segments 448 * af_glyph_hints_dump_edges 449 * af_glyph_hints_get_num_segments 450 * af_glyph_hints_get_segment_offset 451 * ``` 452 * 453 * As an argument, they use another global variable: 454 * 455 * ``` 456 * _af_debug_hints 457 * ``` 458 * 459 * Please have a look at the `ftgrid` demo program to see how those 460 * variables and macros should be used. 461 * 462 * Do not `#undef` these macros here since the build system might define 463 * them for certain configurations only. 464 */ 465 /* #define FT_DEBUG_AUTOFIT */ 466 467 /************************************************************************** 468 * 469 * Memory Debugging 470 * 471 * FreeType now comes with an integrated memory debugger that is capable 472 * of detecting simple errors like memory leaks or double deletes. To 473 * compile it within your build of the library, you should define 474 * `FT_DEBUG_MEMORY` here. 475 * 476 * Note that the memory debugger is only activated at runtime when when 477 * the _environment_ variable `FT2_DEBUG_MEMORY` is defined also! 478 * 479 * Do not `#undef` this macro here since the build system might define it 480 * for certain configurations only. 481 */ 482 /* #define FT_DEBUG_MEMORY */ 483 484 /************************************************************************** 485 * 486 * Module errors 487 * 488 * If this macro is set (which is _not_ the default), the higher byte of 489 * an error code gives the module in which the error has occurred, while 490 * the lower byte is the real error code. 491 * 492 * Setting this macro makes sense for debugging purposes only, since it 493 * would break source compatibility of certain programs that use 494 * FreeType~2. 495 * 496 * More details can be found in the files `ftmoderr.h` and `fterrors.h`. 497 */ 498 #undef FT_CONFIG_OPTION_USE_MODULE_ERRORS 499 500 /************************************************************************** 501 * 502 * OpenType SVG Glyph Support 503 * 504 * Setting this macro enables support for OpenType SVG glyphs. By 505 * default, FreeType can only fetch SVG documents. However, it can also 506 * render them if external rendering hook functions are plugged in at 507 * runtime. 508 * 509 * More details on the hooks can be found in file `otsvg.h`. 510 */ 511 #define FT_CONFIG_OPTION_SVG 512 513 /************************************************************************** 514 * 515 * Error Strings 516 * 517 * If this macro is set, `FT_Error_String` will return meaningful 518 * descriptions. This is not enabled by default to reduce the overall 519 * size of FreeType. 520 * 521 * More details can be found in the file `fterrors.h`. 522 */ 523 #define FT_CONFIG_OPTION_ERROR_STRINGS 524 525 /*************************************************************************/ 526 /*************************************************************************/ 527 /**** ****/ 528 /**** S F N T D R I V E R C O N F I G U R A T I O N ****/ 529 /**** ****/ 530 /*************************************************************************/ 531 /*************************************************************************/ 532 533 /************************************************************************** 534 * 535 * Define `TT_CONFIG_OPTION_EMBEDDED_BITMAPS` if you want to support 536 * embedded bitmaps in all formats using the 'sfnt' module (namely 537 * TrueType~& OpenType). 538 */ 539 #define TT_CONFIG_OPTION_EMBEDDED_BITMAPS 540 541 /************************************************************************** 542 * 543 * Define `TT_CONFIG_OPTION_COLOR_LAYERS` if you want to support colored 544 * outlines (from the 'COLR'/'CPAL' tables) in all formats using the 'sfnt' 545 * module (namely TrueType~& OpenType). 546 */ 547 #define TT_CONFIG_OPTION_COLOR_LAYERS 548 549 /************************************************************************** 550 * 551 * Define `TT_CONFIG_OPTION_POSTSCRIPT_NAMES` if you want to be able to 552 * load and enumerate the glyph Postscript names in a TrueType or OpenType 553 * file. 554 * 555 * Note that when you do not compile the 'psnames' module by undefining the 556 * above `FT_CONFIG_OPTION_POSTSCRIPT_NAMES`, the 'sfnt' module will 557 * contain additional code used to read the PS Names table from a font. 558 * 559 * (By default, the module uses 'psnames' to extract glyph names.) 560 */ 561 #define TT_CONFIG_OPTION_POSTSCRIPT_NAMES 562 563 /************************************************************************** 564 * 565 * Define `TT_CONFIG_OPTION_SFNT_NAMES` if your applications need to access 566 * the internal name table in a SFNT-based format like TrueType or 567 * OpenType. The name table contains various strings used to describe the 568 * font, like family name, copyright, version, etc. It does not contain 569 * any glyph name though. 570 * 571 * Accessing SFNT names is done through the functions declared in 572 * `ftsnames.h`. 573 */ 574 #define TT_CONFIG_OPTION_SFNT_NAMES 575 576 /************************************************************************** 577 * 578 * TrueType CMap support 579 * 580 * Here you can fine-tune which TrueType CMap table format shall be 581 * supported. 582 */ 583 #define TT_CONFIG_CMAP_FORMAT_0 584 #define TT_CONFIG_CMAP_FORMAT_2 585 #define TT_CONFIG_CMAP_FORMAT_4 586 #define TT_CONFIG_CMAP_FORMAT_6 587 #define TT_CONFIG_CMAP_FORMAT_8 588 #define TT_CONFIG_CMAP_FORMAT_10 589 #define TT_CONFIG_CMAP_FORMAT_12 590 #define TT_CONFIG_CMAP_FORMAT_13 591 #define TT_CONFIG_CMAP_FORMAT_14 592 593 /*************************************************************************/ 594 /*************************************************************************/ 595 /**** ****/ 596 /**** 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 ****/ 597 /**** ****/ 598 /*************************************************************************/ 599 /*************************************************************************/ 600 601 /************************************************************************** 602 * 603 * Define `TT_CONFIG_OPTION_BYTECODE_INTERPRETER` if you want to compile a 604 * bytecode interpreter in the TrueType driver. 605 * 606 * By undefining this, you will only compile the code necessary to load 607 * TrueType glyphs without hinting. 608 * 609 * Do not `#undef` this macro here, since the build system might define it 610 * for certain configurations only. 611 */ 612 #define TT_CONFIG_OPTION_BYTECODE_INTERPRETER 613 614 /************************************************************************** 615 * 616 * Define `TT_CONFIG_OPTION_SUBPIXEL_HINTING` if you want to compile 617 * subpixel hinting support into the TrueType driver. This modifies the 618 * TrueType hinting mechanism when anything but `FT_RENDER_MODE_MONO` is 619 * requested. 620 * 621 * In particular, it modifies the bytecode interpreter to interpret (or 622 * not) instructions in a certain way so that all TrueType fonts look like 623 * they do in a Windows ClearType (DirectWrite) environment. See [1] for a 624 * technical overview on what this means. See `ttinterp.h` for more 625 * details on the LEAN option. 626 * 627 * There are three possible values. 628 * 629 * Value 1: 630 * This value is associated with the 'Infinality' moniker, contributed by 631 * an individual nicknamed Infinality with the goal of making TrueType 632 * fonts render better than on Windows. A high amount of configurability 633 * and flexibility, down to rules for single glyphs in fonts, but also 634 * very slow. Its experimental and slow nature and the original 635 * developer losing interest meant that this option was never enabled in 636 * default builds. 637 * 638 * The corresponding interpreter version is v38. 639 * 640 * Value 2: 641 * The new default mode for the TrueType driver. The Infinality code 642 * base was stripped to the bare minimum and all configurability removed 643 * in the name of speed and simplicity. The configurability was mainly 644 * aimed at legacy fonts like 'Arial', 'Times New Roman', or 'Courier'. 645 * Legacy fonts are fonts that modify vertical stems to achieve clean 646 * black-and-white bitmaps. The new mode focuses on applying a minimal 647 * set of rules to all fonts indiscriminately so that modern and web 648 * fonts render well while legacy fonts render okay. 649 * 650 * The corresponding interpreter version is v40. 651 * 652 * Value 3: 653 * Compile both, making both v38 and v40 available (the latter is the 654 * default). 655 * 656 * By undefining these, you get rendering behavior like on Windows without 657 * ClearType, i.e., Windows XP without ClearType enabled and Win9x 658 * (interpreter version v35). Or not, depending on how much hinting blood 659 * and testing tears the font designer put into a given font. If you 660 * define one or both subpixel hinting options, you can switch between 661 * between v35 and the ones you define (using `FT_Property_Set`). 662 * 663 * This option requires `TT_CONFIG_OPTION_BYTECODE_INTERPRETER` to be 664 * defined. 665 * 666 * [1] 667 * https://www.microsoft.com/typography/cleartype/truetypecleartype.aspx 668 */ 669 /* #define TT_CONFIG_OPTION_SUBPIXEL_HINTING 1 */ 670 #define TT_CONFIG_OPTION_SUBPIXEL_HINTING 2 671 /* #define TT_CONFIG_OPTION_SUBPIXEL_HINTING ( 1 | 2 ) */ 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 in 680 * composites. Apple says that they should be scaled by the scaling 681 * factors in the transformation matrix (roughly, it's more complex) while 682 * MS says they should not. OpenType defines two bits in the composite 683 * flags array which can be used to disambiguate, but old fonts will not 684 * have them. 685 * 686 * https://www.microsoft.com/typography/otspec/glyf.htm 687 * https://developer.apple.com/fonts/TrueType-Reference-Manual/RM06/Chap6glyf.html 688 */ 689 #undef TT_CONFIG_OPTION_COMPONENT_OFFSET_SCALED 690 691 /************************************************************************** 692 * 693 * Define `TT_CONFIG_OPTION_GX_VAR_SUPPORT` if you want to include support 694 * for Apple's distortable font technology ('fvar', 'gvar', 'cvar', and 695 * 'avar' tables). Tagged 'Font Variations', this is now part of OpenType 696 * also. This has many similarities to Type~1 Multiple Masters support. 697 */ 698 #define TT_CONFIG_OPTION_GX_VAR_SUPPORT 699 700 /************************************************************************** 701 * 702 * Define `TT_CONFIG_OPTION_BDF` if you want to include support for an 703 * embedded 'BDF~' table within SFNT-based bitmap formats. 704 */ 705 #define TT_CONFIG_OPTION_BDF 706 707 /************************************************************************** 708 * 709 * Option `TT_CONFIG_OPTION_MAX_RUNNABLE_OPCODES` controls the maximum 710 * number of bytecode instructions executed for a single run of the 711 * bytecode interpreter, needed to prevent infinite loops. You don't want 712 * to change this except for very special situations (e.g., making a 713 * library fuzzer spend less time to handle broken fonts). 714 * 715 * It is not expected that this value is ever modified by a configuring 716 * script; instead, it gets surrounded with `#ifndef ... #endif` so that 717 * the value can be set as a preprocessor option on the compiler's command 718 * line. 719 */ 720 #ifndef TT_CONFIG_OPTION_MAX_RUNNABLE_OPCODES 721 #define TT_CONFIG_OPTION_MAX_RUNNABLE_OPCODES 1000000L 722 #endif 723 724 /*************************************************************************/ 725 /*************************************************************************/ 726 /**** ****/ 727 /**** T Y P E 1 D R I V E R C O N F I G U R A T I O N ****/ 728 /**** ****/ 729 /*************************************************************************/ 730 /*************************************************************************/ 731 732 /************************************************************************** 733 * 734 * `T1_MAX_DICT_DEPTH` is the maximum depth of nest dictionaries and arrays 735 * in the Type~1 stream (see `t1load.c`). A minimum of~4 is required. 736 */ 737 #define T1_MAX_DICT_DEPTH 5 738 739 /************************************************************************** 740 * 741 * `T1_MAX_SUBRS_CALLS` details the maximum number of nested sub-routine 742 * calls during glyph loading. 743 */ 744 #define T1_MAX_SUBRS_CALLS 16 745 746 /************************************************************************** 747 * 748 * `T1_MAX_CHARSTRING_OPERANDS` is the charstring stack's capacity. A 749 * minimum of~16 is required. 750 * 751 * The Chinese font 'MingTiEG-Medium' (covering the CNS 11643 character 752 * set) needs 256. 753 */ 754 #define T1_MAX_CHARSTRINGS_OPERANDS 256 755 756 /************************************************************************** 757 * 758 * Define this configuration macro if you want to prevent the compilation 759 * of the 't1afm' module, which is in charge of reading Type~1 AFM files 760 * into an existing face. Note that if set, the Type~1 driver will be 761 * unable to produce kerning distances. 762 */ 763 #undef T1_CONFIG_OPTION_NO_AFM 764 765 /************************************************************************** 766 * 767 * Define this configuration macro if you want to prevent the compilation 768 * of the Multiple Masters font support in the Type~1 driver. 769 */ 770 #undef T1_CONFIG_OPTION_NO_MM_SUPPORT 771 772 /************************************************************************** 773 * 774 * `T1_CONFIG_OPTION_OLD_ENGINE` controls whether the pre-Adobe Type~1 775 * engine gets compiled into FreeType. If defined, it is possible to 776 * switch between the two engines using the `hinting-engine` property of 777 * the 'type1' driver module. 778 */ 779 /* #define T1_CONFIG_OPTION_OLD_ENGINE */ 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 * Using `CFF_CONFIG_OPTION_DARKENING_PARAMETER_{X,Y}{1,2,3,4}` it is 792 * possible to set up the default values of the four control points that 793 * define the stem darkening behaviour of the (new) CFF engine. For more 794 * details please read the documentation of the `darkening-parameters` 795 * property (file `ftdriver.h`), which allows the control at run-time. 796 * 797 * Do **not** undefine these macros! 798 */ 799 #define CFF_CONFIG_OPTION_DARKENING_PARAMETER_X1 500 800 #define CFF_CONFIG_OPTION_DARKENING_PARAMETER_Y1 400 801 802 #define CFF_CONFIG_OPTION_DARKENING_PARAMETER_X2 1000 803 #define CFF_CONFIG_OPTION_DARKENING_PARAMETER_Y2 275 804 805 #define CFF_CONFIG_OPTION_DARKENING_PARAMETER_X3 1667 806 #define CFF_CONFIG_OPTION_DARKENING_PARAMETER_Y3 275 807 808 #define CFF_CONFIG_OPTION_DARKENING_PARAMETER_X4 2333 809 #define CFF_CONFIG_OPTION_DARKENING_PARAMETER_Y4 0 810 811 /************************************************************************** 812 * 813 * `CFF_CONFIG_OPTION_OLD_ENGINE` controls whether the pre-Adobe CFF engine 814 * gets compiled into FreeType. If defined, it is possible to switch 815 * between the two engines using the `hinting-engine` property of the 'cff' 816 * driver module. 817 */ 818 /* #define CFF_CONFIG_OPTION_OLD_ENGINE */ 819 820 /*************************************************************************/ 821 /*************************************************************************/ 822 /**** ****/ 823 /**** P C 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 * There are many PCF fonts just called 'Fixed' which look completely 831 * different, and which have nothing to do with each other. When selecting 832 * 'Fixed' in KDE or Gnome one gets results that appear rather random, the 833 * style changes often if one changes the size and one cannot select some 834 * fonts at all. This option makes the 'pcf' module prepend the foundry 835 * name (plus a space) to the family name. 836 * 837 * We also check whether we have 'wide' characters; all put together, we 838 * get family names like 'Sony Fixed' or 'Misc Fixed Wide'. 839 * 840 * If this option is activated, it can be controlled with the 841 * `no-long-family-names` property of the 'pcf' driver module. 842 */ 843 /* #define PCF_CONFIG_OPTION_LONG_FAMILY_NAMES */ 844 845 /*************************************************************************/ 846 /*************************************************************************/ 847 /**** ****/ 848 /**** 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 ****/ 849 /**** ****/ 850 /*************************************************************************/ 851 /*************************************************************************/ 852 853 /************************************************************************** 854 * 855 * Compile 'autofit' module with CJK (Chinese, Japanese, Korean) script 856 * support. 857 */ 858 #define AF_CONFIG_OPTION_CJK 859 860 /************************************************************************** 861 * 862 * Compile 'autofit' module with fallback Indic script support, covering 863 * some scripts that the 'latin' submodule of the 'autofit' module doesn't 864 * (yet) handle. Currently, this needs option `AF_CONFIG_OPTION_CJK`. 865 */ 866 #ifdef AF_CONFIG_OPTION_CJK 867 #define AF_CONFIG_OPTION_INDIC 868 #endif 869 870 /************************************************************************** 871 * 872 * Use TrueType-like size metrics for 'light' auto-hinting. 873 * 874 * It is strongly recommended to avoid this option, which exists only to 875 * help some legacy applications retain its appearance and behaviour with 876 * respect to auto-hinted TrueType fonts. 877 * 878 * The very reason this option exists at all are GNU/Linux distributions 879 * like Fedora that did not un-patch the following change (which was 880 * present in FreeType between versions 2.4.6 and 2.7.1, inclusive). 881 * 882 * ``` 883 * 2011-07-16 Steven Chu <steven.f.chu@gmail.com> 884 * 885 * [truetype] Fix metrics on size request for scalable fonts. 886 * ``` 887 * 888 * This problematic commit is now reverted (more or less). 889 */ 890 /* #define AF_CONFIG_OPTION_TT_SIZE_METRICS */ 891 892 /* */ 893 894 /* 895 * This macro is obsolete. Support has been removed in FreeType version 896 * 2.5. 897 */ 898 /* #define FT_CONFIG_OPTION_OLD_INTERNALS */ 899 900 /* 901 * The next three macros are defined if native TrueType hinting is 902 * requested by the definitions above. Don't change this. 903 */ 904 #ifdef TT_CONFIG_OPTION_BYTECODE_INTERPRETER 905 #define TT_USE_BYTECODE_INTERPRETER 906 907 #ifdef TT_CONFIG_OPTION_SUBPIXEL_HINTING 908 #if TT_CONFIG_OPTION_SUBPIXEL_HINTING & 1 909 #define TT_SUPPORT_SUBPIXEL_HINTING_INFINALITY 910 #endif 911 912 #if TT_CONFIG_OPTION_SUBPIXEL_HINTING & 2 913 #define TT_SUPPORT_SUBPIXEL_HINTING_MINIMAL 914 #endif 915 #endif 916 #endif 917 918 /* 919 * The TT_SUPPORT_COLRV1 macro is defined to indicate to clients that this 920 * version of FreeType has support for 'COLR' v1 API. This definition is 921 * useful to FreeType clients that want to build in support for 'COLR' v1 922 * depending on a tip-of-tree checkout before it is officially released in 923 * FreeType, and while the feature cannot yet be tested against using 924 * version macros. Don't change this macro. This may be removed once the 925 * feature is in a FreeType release version and version macros can be used 926 * to test for availability. 927 */ 928 #ifdef TT_CONFIG_OPTION_COLOR_LAYERS 929 #define TT_SUPPORT_COLRV1 930 #endif 931 932 /* 933 * Check CFF darkening parameters. The checks are the same as in function 934 * `cff_property_set` in file `cffdrivr.c`. 935 */ 936 #if CFF_CONFIG_OPTION_DARKENING_PARAMETER_X1 < 0 || \ 937 CFF_CONFIG_OPTION_DARKENING_PARAMETER_X2 < 0 || \ 938 CFF_CONFIG_OPTION_DARKENING_PARAMETER_X3 < 0 || \ 939 CFF_CONFIG_OPTION_DARKENING_PARAMETER_X4 < 0 || \ 940 \ 941 CFF_CONFIG_OPTION_DARKENING_PARAMETER_Y1 < 0 || \ 942 CFF_CONFIG_OPTION_DARKENING_PARAMETER_Y2 < 0 || \ 943 CFF_CONFIG_OPTION_DARKENING_PARAMETER_Y3 < 0 || \ 944 CFF_CONFIG_OPTION_DARKENING_PARAMETER_Y4 < 0 || \ 945 \ 946 CFF_CONFIG_OPTION_DARKENING_PARAMETER_X1 > \ 947 CFF_CONFIG_OPTION_DARKENING_PARAMETER_X2 || \ 948 CFF_CONFIG_OPTION_DARKENING_PARAMETER_X2 > \ 949 CFF_CONFIG_OPTION_DARKENING_PARAMETER_X3 || \ 950 CFF_CONFIG_OPTION_DARKENING_PARAMETER_X3 > \ 951 CFF_CONFIG_OPTION_DARKENING_PARAMETER_X4 || \ 952 \ 953 CFF_CONFIG_OPTION_DARKENING_PARAMETER_Y1 > 500 || \ 954 CFF_CONFIG_OPTION_DARKENING_PARAMETER_Y2 > 500 || \ 955 CFF_CONFIG_OPTION_DARKENING_PARAMETER_Y3 > 500 || \ 956 CFF_CONFIG_OPTION_DARKENING_PARAMETER_Y4 > 500 957 #error "Invalid CFF darkening parameters!" 958 #endif 959 960 FT_END_HEADER 961 962 #endif /* FTOPTION_H_ */ 963 964 /* END */ 965
