1 /**************************************************************************** 2 * 3 * ftoption.h (for development) 4 * 5 * User-selectable configuration macros (specification only). 6 * 7 * Copyright (C) 1996-2020 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 * autofitter:warping=1 110 * ``` 111 * 112 */ 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 #define FT_CONFIG_OPTION_USE_PNG 274 275 276 /************************************************************************** 277 * 278 * HarfBuzz support. 279 * 280 * FreeType uses the HarfBuzz library to improve auto-hinting of OpenType 281 * fonts. If available, many glyphs not directly addressable by a font's 282 * character map will be hinted also. 283 * 284 * Define this macro if you want to enable this 'feature'. 285 * 286 * If you use a build system like cmake or the `configure` script, 287 * options set by those programs have precedence, overwriting the value 288 * here with the configured one. 289 */ 290 #define FT_CONFIG_OPTION_USE_HARFBUZZ 291 292 293 /************************************************************************** 294 * 295 * Brotli support. 296 * 297 * FreeType uses the Brotli library to provide support for decompressing 298 * WOFF2 streams. 299 * 300 * Define this macro if you want to enable this 'feature'. 301 * 302 * If you use a build system like cmake or the `configure` script, 303 * options set by those programs have precedence, overwriting the value 304 * here with the configured one. 305 */ 306 #define FT_CONFIG_OPTION_USE_BROTLI 307 308 309 /************************************************************************** 310 * 311 * Glyph Postscript Names handling 312 * 313 * By default, FreeType 2 is compiled with the 'psnames' module. This 314 * module is in charge of converting a glyph name string into a Unicode 315 * value, or return a Macintosh standard glyph name for the use with the 316 * TrueType 'post' table. 317 * 318 * Undefine this macro if you do not want 'psnames' compiled in your 319 * build of FreeType. This has the following effects: 320 * 321 * - The TrueType driver will provide its own set of glyph names, if you 322 * build it to support postscript names in the TrueType 'post' table, 323 * but will not synthesize a missing Unicode charmap. 324 * 325 * - The Type~1 driver will not be able to synthesize a Unicode charmap 326 * out of the glyphs found in the fonts. 327 * 328 * You would normally undefine this configuration macro when building a 329 * version of FreeType that doesn't contain a Type~1 or CFF driver. 330 */ 331 #define FT_CONFIG_OPTION_POSTSCRIPT_NAMES 332 333 334 /************************************************************************** 335 * 336 * Postscript Names to Unicode Values support 337 * 338 * By default, FreeType~2 is built with the 'psnames' module compiled in. 339 * Among other things, the module is used to convert a glyph name into a 340 * Unicode value. This is especially useful in order to synthesize on 341 * the fly a Unicode charmap from the CFF/Type~1 driver through a big 342 * table named the 'Adobe Glyph List' (AGL). 343 * 344 * Undefine this macro if you do not want the Adobe Glyph List compiled 345 * in your 'psnames' module. The Type~1 driver will not be able to 346 * synthesize a Unicode charmap out of the glyphs found in the fonts. 347 */ 348 #define FT_CONFIG_OPTION_ADOBE_GLYPH_LIST 349 350 351 /************************************************************************** 352 * 353 * Support for Mac fonts 354 * 355 * Define this macro if you want support for outline fonts in Mac format 356 * (mac dfont, mac resource, macbinary containing a mac resource) on 357 * non-Mac platforms. 358 * 359 * Note that the 'FOND' resource isn't checked. 360 */ 361 #define FT_CONFIG_OPTION_MAC_FONTS 362 363 364 /************************************************************************** 365 * 366 * Guessing methods to access embedded resource forks 367 * 368 * Enable extra Mac fonts support on non-Mac platforms (e.g., GNU/Linux). 369 * 370 * Resource forks which include fonts data are stored sometimes in 371 * locations which users or developers don't expected. In some cases, 372 * resource forks start with some offset from the head of a file. In 373 * other cases, the actual resource fork is stored in file different from 374 * what the user specifies. If this option is activated, FreeType tries 375 * to guess whether such offsets or different file names must be used. 376 * 377 * Note that normal, direct access of resource forks is controlled via 378 * the `FT_CONFIG_OPTION_MAC_FONTS` option. 379 */ 380 #ifdef FT_CONFIG_OPTION_MAC_FONTS 381 #define FT_CONFIG_OPTION_GUESSING_EMBEDDED_RFORK 382 #endif 383 384 385 /************************************************************************** 386 * 387 * Allow the use of `FT_Incremental_Interface` to load typefaces that 388 * contain no glyph data, but supply it via a callback function. This is 389 * required by clients supporting document formats which supply font data 390 * incrementally as the document is parsed, such as the Ghostscript 391 * interpreter for the PostScript language. 392 */ 393 #define FT_CONFIG_OPTION_INCREMENTAL 394 395 396 /************************************************************************** 397 * 398 * The size in bytes of the render pool used by the scan-line converter to 399 * do all of its work. 400 */ 401 #define FT_RENDER_POOL_SIZE 16384L 402 403 404 /************************************************************************** 405 * 406 * FT_MAX_MODULES 407 * 408 * The maximum number of modules that can be registered in a single 409 * FreeType library object. 32~is the default. 410 */ 411 #define FT_MAX_MODULES 32 412 413 414 /************************************************************************** 415 * 416 * Debug level 417 * 418 * FreeType can be compiled in debug or trace mode. In debug mode, 419 * errors are reported through the 'ftdebug' component. In trace mode, 420 * additional messages are sent to the standard output during execution. 421 * 422 * Define `FT_DEBUG_LEVEL_ERROR` to build the library in debug mode. 423 * Define `FT_DEBUG_LEVEL_TRACE` to build it in trace mode. 424 * 425 * Don't define any of these macros to compile in 'release' mode! 426 * 427 * Do not `#undef` these macros here since the build system might define 428 * them for certain configurations only. 429 */ 430 #define FT_DEBUG_LEVEL_ERROR 431 #define FT_DEBUG_LEVEL_TRACE 432 433 434 /************************************************************************** 435 * 436 * Autofitter debugging 437 * 438 * If `FT_DEBUG_AUTOFIT` is defined, FreeType provides some means to 439 * control the autofitter behaviour for debugging purposes with global 440 * boolean variables (consequently, you should **never** enable this 441 * while compiling in 'release' mode): 442 * 443 * ``` 444 * _af_debug_disable_horz_hints 445 * _af_debug_disable_vert_hints 446 * _af_debug_disable_blue_hints 447 * ``` 448 * 449 * Additionally, the following functions provide dumps of various 450 * internal autofit structures to stdout (using `printf`): 451 * 452 * ``` 453 * af_glyph_hints_dump_points 454 * af_glyph_hints_dump_segments 455 * af_glyph_hints_dump_edges 456 * af_glyph_hints_get_num_segments 457 * af_glyph_hints_get_segment_offset 458 * ``` 459 * 460 * As an argument, they use another global variable: 461 * 462 * ``` 463 * _af_debug_hints 464 * ``` 465 * 466 * Please have a look at the `ftgrid` demo program to see how those 467 * variables and macros should be used. 468 * 469 * Do not `#undef` these macros here since the build system might define 470 * them for certain configurations only. 471 */ 472 #define FT_DEBUG_AUTOFIT 473 474 475 /************************************************************************** 476 * 477 * Memory Debugging 478 * 479 * FreeType now comes with an integrated memory debugger that is capable 480 * of detecting simple errors like memory leaks or double deletes. To 481 * compile it within your build of the library, you should define 482 * `FT_DEBUG_MEMORY` here. 483 * 484 * Note that the memory debugger is only activated at runtime when when 485 * the _environment_ variable `FT2_DEBUG_MEMORY` is defined also! 486 * 487 * Do not `#undef` this macro here since the build system might define it 488 * for certain configurations only. 489 */ 490 #define FT_DEBUG_MEMORY 491 492 493 /************************************************************************** 494 * 495 * Module errors 496 * 497 * If this macro is set (which is _not_ the default), the higher byte of 498 * an error code gives the module in which the error has occurred, while 499 * the lower byte is the real error code. 500 * 501 * Setting this macro makes sense for debugging purposes only, since it 502 * would break source compatibility of certain programs that use 503 * FreeType~2. 504 * 505 * More details can be found in the files `ftmoderr.h` and `fterrors.h`. 506 */ 507 #undef FT_CONFIG_OPTION_USE_MODULE_ERRORS 508 509 510 /************************************************************************** 511 * 512 * Error Strings 513 * 514 * If this macro is set, `FT_Error_String` will return meaningful 515 * descriptions. This is not enabled by default to reduce the overall 516 * size of FreeType. 517 * 518 * More details can be found in the file `fterrors.h`. 519 */ 520 /* #define FT_CONFIG_OPTION_ERROR_STRINGS */ 521 522 523 /*************************************************************************/ 524 /*************************************************************************/ 525 /**** ****/ 526 /**** S F N T D R I V E R C O N F I G U R A T I O N ****/ 527 /**** ****/ 528 /*************************************************************************/ 529 /*************************************************************************/ 530 531 532 /************************************************************************** 533 * 534 * Define `TT_CONFIG_OPTION_EMBEDDED_BITMAPS` if you want to support 535 * embedded bitmaps in all formats using the 'sfnt' module (namely 536 * TrueType~& OpenType). 537 */ 538 #define TT_CONFIG_OPTION_EMBEDDED_BITMAPS 539 540 541 /************************************************************************** 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 * 552 * Define `TT_CONFIG_OPTION_POSTSCRIPT_NAMES` if you want to be able to 553 * load and enumerate the glyph Postscript names in a TrueType or OpenType 554 * file. 555 * 556 * Note that when you do not compile the 'psnames' module by undefining the 557 * above `FT_CONFIG_OPTION_POSTSCRIPT_NAMES`, the 'sfnt' module will 558 * contain additional code used to read the PS Names table from a font. 559 * 560 * (By default, the module uses 'psnames' to extract glyph names.) 561 */ 562 #define TT_CONFIG_OPTION_POSTSCRIPT_NAMES 563 564 565 /************************************************************************** 566 * 567 * Define `TT_CONFIG_OPTION_SFNT_NAMES` if your applications need to access 568 * the internal name table in a SFNT-based format like TrueType or 569 * OpenType. The name table contains various strings used to describe the 570 * font, like family name, copyright, version, etc. It does not contain 571 * any glyph name though. 572 * 573 * Accessing SFNT names is done through the functions declared in 574 * `ftsnames.h`. 575 */ 576 #define TT_CONFIG_OPTION_SFNT_NAMES 577 578 579 /************************************************************************** 580 * 581 * TrueType CMap support 582 * 583 * Here you can fine-tune which TrueType CMap table format shall be 584 * supported. 585 */ 586 #define TT_CONFIG_CMAP_FORMAT_0 587 #define TT_CONFIG_CMAP_FORMAT_2 588 #define TT_CONFIG_CMAP_FORMAT_4 589 #define TT_CONFIG_CMAP_FORMAT_6 590 #define TT_CONFIG_CMAP_FORMAT_8 591 #define TT_CONFIG_CMAP_FORMAT_10 592 #define TT_CONFIG_CMAP_FORMAT_12 593 #define TT_CONFIG_CMAP_FORMAT_13 594 #define TT_CONFIG_CMAP_FORMAT_14 595 596 597 /*************************************************************************/ 598 /*************************************************************************/ 599 /**** ****/ 600 /**** 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 ****/ 601 /**** ****/ 602 /*************************************************************************/ 603 /*************************************************************************/ 604 605 /************************************************************************** 606 * 607 * Define `TT_CONFIG_OPTION_BYTECODE_INTERPRETER` if you want to compile a 608 * bytecode interpreter in the TrueType driver. 609 * 610 * By undefining this, you will only compile the code necessary to load 611 * TrueType glyphs without hinting. 612 * 613 * Do not `#undef` this macro here, since the build system might define it 614 * for certain configurations only. 615 */ 616 #define TT_CONFIG_OPTION_BYTECODE_INTERPRETER 617 618 619 /************************************************************************** 620 * 621 * Define `TT_CONFIG_OPTION_SUBPIXEL_HINTING` if you want to compile 622 * subpixel hinting support into the TrueType driver. This modifies the 623 * TrueType hinting mechanism when anything but `FT_RENDER_MODE_MONO` is 624 * requested. 625 * 626 * In particular, it modifies the bytecode interpreter to interpret (or 627 * not) instructions in a certain way so that all TrueType fonts look like 628 * they do in a Windows ClearType (DirectWrite) environment. See [1] for a 629 * technical overview on what this means. See `ttinterp.h` for more 630 * details on the LEAN option. 631 * 632 * There are three possible values. 633 * 634 * Value 1: 635 * This value is associated with the 'Infinality' moniker, contributed by 636 * an individual nicknamed Infinality with the goal of making TrueType 637 * fonts render better than on Windows. A high amount of configurability 638 * and flexibility, down to rules for single glyphs in fonts, but also 639 * very slow. Its experimental and slow nature and the original 640 * developer losing interest meant that this option was never enabled in 641 * default builds. 642 * 643 * The corresponding interpreter version is v38. 644 * 645 * Value 2: 646 * The new default mode for the TrueType driver. The Infinality code 647 * base was stripped to the bare minimum and all configurability removed 648 * in the name of speed and simplicity. The configurability was mainly 649 * aimed at legacy fonts like 'Arial', 'Times New Roman', or 'Courier'. 650 * Legacy fonts are fonts that modify vertical stems to achieve clean 651 * black-and-white bitmaps. The new mode focuses on applying a minimal 652 * set of rules to all fonts indiscriminately so that modern and web 653 * fonts render well while legacy fonts render okay. 654 * 655 * The corresponding interpreter version is v40. 656 * 657 * Value 3: 658 * Compile both, making both v38 and v40 available (the latter is the 659 * default). 660 * 661 * By undefining these, you get rendering behavior like on Windows without 662 * ClearType, i.e., Windows XP without ClearType enabled and Win9x 663 * (interpreter version v35). Or not, depending on how much hinting blood 664 * and testing tears the font designer put into a given font. If you 665 * define one or both subpixel hinting options, you can switch between 666 * between v35 and the ones you define (using `FT_Property_Set`). 667 * 668 * This option requires `TT_CONFIG_OPTION_BYTECODE_INTERPRETER` to be 669 * defined. 670 * 671 * [1] 672 * https://www.microsoft.com/typography/cleartype/truetypecleartype.aspx 673 */ 674 /* #define TT_CONFIG_OPTION_SUBPIXEL_HINTING 1 */ 675 /* #define TT_CONFIG_OPTION_SUBPIXEL_HINTING 2 */ 676 #define TT_CONFIG_OPTION_SUBPIXEL_HINTING ( 1 | 2 ) 677 678 679 /************************************************************************** 680 * 681 * Define `TT_CONFIG_OPTION_COMPONENT_OFFSET_SCALED` to compile the 682 * TrueType glyph loader to use Apple's definition of how to handle 683 * component offsets in composite glyphs. 684 * 685 * Apple and MS disagree on the default behavior of component offsets in 686 * composites. Apple says that they should be scaled by the scaling 687 * factors in the transformation matrix (roughly, it's more complex) while 688 * MS says they should not. OpenType defines two bits in the composite 689 * flags array which can be used to disambiguate, but old fonts will not 690 * have them. 691 * 692 * https://www.microsoft.com/typography/otspec/glyf.htm 693 * https://developer.apple.com/fonts/TrueType-Reference-Manual/RM06/Chap6glyf.html 694 */ 695 #undef TT_CONFIG_OPTION_COMPONENT_OFFSET_SCALED 696 697 698 /************************************************************************** 699 * 700 * Define `TT_CONFIG_OPTION_GX_VAR_SUPPORT` if you want to include support 701 * for Apple's distortable font technology ('fvar', 'gvar', 'cvar', and 702 * 'avar' tables). Tagged 'Font Variations', this is now part of OpenType 703 * also. This has many similarities to Type~1 Multiple Masters support. 704 */ 705 #define TT_CONFIG_OPTION_GX_VAR_SUPPORT 706 707 708 /************************************************************************** 709 * 710 * Define `TT_CONFIG_OPTION_BDF` if you want to include support for an 711 * embedded 'BDF~' table within SFNT-based bitmap formats. 712 */ 713 #define TT_CONFIG_OPTION_BDF 714 715 716 /************************************************************************** 717 * 718 * Option `TT_CONFIG_OPTION_MAX_RUNNABLE_OPCODES` controls the maximum 719 * number of bytecode instructions executed for a single run of the 720 * bytecode interpreter, needed to prevent infinite loops. You don't want 721 * to change this except for very special situations (e.g., making a 722 * library fuzzer spend less time to handle broken fonts). 723 * 724 * It is not expected that this value is ever modified by a configuring 725 * script; instead, it gets surrounded with `#ifndef ... #endif` so that 726 * the value can be set as a preprocessor option on the compiler's command 727 * line. 728 */ 729 #ifndef TT_CONFIG_OPTION_MAX_RUNNABLE_OPCODES 730 #define TT_CONFIG_OPTION_MAX_RUNNABLE_OPCODES 1000000L 731 #endif 732 733 734 /*************************************************************************/ 735 /*************************************************************************/ 736 /**** ****/ 737 /**** T Y P E 1 D R I V E R C O N F I G U R A T I O N ****/ 738 /**** ****/ 739 /*************************************************************************/ 740 /*************************************************************************/ 741 742 743 /************************************************************************** 744 * 745 * `T1_MAX_DICT_DEPTH` is the maximum depth of nest dictionaries and arrays 746 * in the Type~1 stream (see `t1load.c`). A minimum of~4 is required. 747 */ 748 #define T1_MAX_DICT_DEPTH 5 749 750 751 /************************************************************************** 752 * 753 * `T1_MAX_SUBRS_CALLS` details the maximum number of nested sub-routine 754 * calls during glyph loading. 755 */ 756 #define T1_MAX_SUBRS_CALLS 16 757 758 759 /************************************************************************** 760 * 761 * `T1_MAX_CHARSTRING_OPERANDS` is the charstring stack's capacity. A 762 * minimum of~16 is required. 763 * 764 * The Chinese font 'MingTiEG-Medium' (covering the CNS 11643 character 765 * set) needs 256. 766 */ 767 #define T1_MAX_CHARSTRINGS_OPERANDS 256 768 769 770 /************************************************************************** 771 * 772 * Define this configuration macro if you want to prevent the compilation 773 * of the 't1afm' module, which is in charge of reading Type~1 AFM files 774 * into an existing face. Note that if set, the Type~1 driver will be 775 * unable to produce kerning distances. 776 */ 777 #undef T1_CONFIG_OPTION_NO_AFM 778 779 780 /************************************************************************** 781 * 782 * Define this configuration macro if you want to prevent the compilation 783 * of the Multiple Masters font support in the Type~1 driver. 784 */ 785 #undef T1_CONFIG_OPTION_NO_MM_SUPPORT 786 787 788 /************************************************************************** 789 * 790 * `T1_CONFIG_OPTION_OLD_ENGINE` controls whether the pre-Adobe Type~1 791 * engine gets compiled into FreeType. If defined, it is possible to 792 * switch between the two engines using the `hinting-engine` property of 793 * the 'type1' driver module. 794 */ 795 #define T1_CONFIG_OPTION_OLD_ENGINE 796 797 798 /*************************************************************************/ 799 /*************************************************************************/ 800 /**** ****/ 801 /**** C F F D R I V E R C O N F I G U R A T I O N ****/ 802 /**** ****/ 803 /*************************************************************************/ 804 /*************************************************************************/ 805 806 807 /************************************************************************** 808 * 809 * Using `CFF_CONFIG_OPTION_DARKENING_PARAMETER_{X,Y}{1,2,3,4}` it is 810 * possible to set up the default values of the four control points that 811 * define the stem darkening behaviour of the (new) CFF engine. For more 812 * details please read the documentation of the `darkening-parameters` 813 * property (file `ftdriver.h`), which allows the control at run-time. 814 * 815 * Do **not** undefine these macros! 816 */ 817 #define CFF_CONFIG_OPTION_DARKENING_PARAMETER_X1 500 818 #define CFF_CONFIG_OPTION_DARKENING_PARAMETER_Y1 400 819 820 #define CFF_CONFIG_OPTION_DARKENING_PARAMETER_X2 1000 821 #define CFF_CONFIG_OPTION_DARKENING_PARAMETER_Y2 275 822 823 #define CFF_CONFIG_OPTION_DARKENING_PARAMETER_X3 1667 824 #define CFF_CONFIG_OPTION_DARKENING_PARAMETER_Y3 275 825 826 #define CFF_CONFIG_OPTION_DARKENING_PARAMETER_X4 2333 827 #define CFF_CONFIG_OPTION_DARKENING_PARAMETER_Y4 0 828 829 830 /************************************************************************** 831 * 832 * `CFF_CONFIG_OPTION_OLD_ENGINE` controls whether the pre-Adobe CFF engine 833 * gets compiled into FreeType. If defined, it is possible to switch 834 * between the two engines using the `hinting-engine` property of the 'cff' 835 * driver module. 836 */ 837 #define CFF_CONFIG_OPTION_OLD_ENGINE 838 839 840 /*************************************************************************/ 841 /*************************************************************************/ 842 /**** ****/ 843 /**** P C F D R I V E R C O N F I G U R A T I O N ****/ 844 /**** ****/ 845 /*************************************************************************/ 846 /*************************************************************************/ 847 848 849 /************************************************************************** 850 * 851 * There are many PCF fonts just called 'Fixed' which look completely 852 * different, and which have nothing to do with each other. When selecting 853 * 'Fixed' in KDE or Gnome one gets results that appear rather random, the 854 * style changes often if one changes the size and one cannot select some 855 * fonts at all. This option makes the 'pcf' module prepend the foundry 856 * name (plus a space) to the family name. 857 * 858 * We also check whether we have 'wide' characters; all put together, we 859 * get family names like 'Sony Fixed' or 'Misc Fixed Wide'. 860 * 861 * If this option is activated, it can be controlled with the 862 * `no-long-family-names` property of the 'pcf' driver module. 863 */ 864 #define PCF_CONFIG_OPTION_LONG_FAMILY_NAMES 865 866 867 /*************************************************************************/ 868 /*************************************************************************/ 869 /**** ****/ 870 /**** 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 ****/ 871 /**** ****/ 872 /*************************************************************************/ 873 /*************************************************************************/ 874 875 876 /************************************************************************** 877 * 878 * Compile 'autofit' module with CJK (Chinese, Japanese, Korean) script 879 * support. 880 */ 881 #define AF_CONFIG_OPTION_CJK 882 883 884 /************************************************************************** 885 * 886 * Compile 'autofit' module with fallback Indic script support, covering 887 * some scripts that the 'latin' submodule of the 'autofit' module doesn't 888 * (yet) handle. Currently, this needs option `AF_CONFIG_OPTION_CJK`. 889 */ 890 #ifdef AF_CONFIG_OPTION_CJK 891 #define AF_CONFIG_OPTION_INDIC 892 #endif 893 894 895 /************************************************************************** 896 * 897 * Compile 'autofit' module with warp hinting. The idea of the warping 898 * code is to slightly scale and shift a glyph within a single dimension so 899 * that as much of its segments are aligned (more or less) on the grid. To 900 * find out the optimal scaling and shifting value, various parameter 901 * combinations are tried and scored. 902 * 903 * You can switch warping on and off with the `warping` property of the 904 * auto-hinter (see file `ftdriver.h` for more information; by default it 905 * is switched off). 906 * 907 * This experimental option is not active if the rendering mode is 908 * `FT_RENDER_MODE_LIGHT`. 909 */ 910 #define AF_CONFIG_OPTION_USE_WARPER 911 912 913 /************************************************************************** 914 * 915 * Use TrueType-like size metrics for 'light' auto-hinting. 916 * 917 * It is strongly recommended to avoid this option, which exists only to 918 * help some legacy applications retain its appearance and behaviour with 919 * respect to auto-hinted TrueType fonts. 920 * 921 * The very reason this option exists at all are GNU/Linux distributions 922 * like Fedora that did not un-patch the following change (which was 923 * present in FreeType between versions 2.4.6 and 2.7.1, inclusive). 924 * 925 * ``` 926 * 2011-07-16 Steven Chu <steven.f.chu@gmail.com> 927 * 928 * [truetype] Fix metrics on size request for scalable fonts. 929 * ``` 930 * 931 * This problematic commit is now reverted (more or less). 932 */ 933 /* #define AF_CONFIG_OPTION_TT_SIZE_METRICS */ 934 935 /* */ 936 937 938 /* 939 * This macro is obsolete. Support has been removed in FreeType version 940 * 2.5. 941 */ 942 /* #define FT_CONFIG_OPTION_OLD_INTERNALS */ 943 944 945 /* 946 * The next three macros are defined if native TrueType hinting is 947 * requested by the definitions above. Don't change this. 948 */ 949 #ifdef TT_CONFIG_OPTION_BYTECODE_INTERPRETER 950 #define TT_USE_BYTECODE_INTERPRETER 951 952 #ifdef TT_CONFIG_OPTION_SUBPIXEL_HINTING 953 #if TT_CONFIG_OPTION_SUBPIXEL_HINTING & 1 954 #define TT_SUPPORT_SUBPIXEL_HINTING_INFINALITY 955 #endif 956 957 #if TT_CONFIG_OPTION_SUBPIXEL_HINTING & 2 958 #define TT_SUPPORT_SUBPIXEL_HINTING_MINIMAL 959 #endif 960 #endif 961 #endif 962 963 964 /* 965 * Check CFF darkening parameters. The checks are the same as in function 966 * `cff_property_set` in file `cffdrivr.c`. 967 */ 968 #if CFF_CONFIG_OPTION_DARKENING_PARAMETER_X1 < 0 || \ 969 CFF_CONFIG_OPTION_DARKENING_PARAMETER_X2 < 0 || \ 970 CFF_CONFIG_OPTION_DARKENING_PARAMETER_X3 < 0 || \ 971 CFF_CONFIG_OPTION_DARKENING_PARAMETER_X4 < 0 || \ 972 \ 973 CFF_CONFIG_OPTION_DARKENING_PARAMETER_Y1 < 0 || \ 974 CFF_CONFIG_OPTION_DARKENING_PARAMETER_Y2 < 0 || \ 975 CFF_CONFIG_OPTION_DARKENING_PARAMETER_Y3 < 0 || \ 976 CFF_CONFIG_OPTION_DARKENING_PARAMETER_Y4 < 0 || \ 977 \ 978 CFF_CONFIG_OPTION_DARKENING_PARAMETER_X1 > \ 979 CFF_CONFIG_OPTION_DARKENING_PARAMETER_X2 || \ 980 CFF_CONFIG_OPTION_DARKENING_PARAMETER_X2 > \ 981 CFF_CONFIG_OPTION_DARKENING_PARAMETER_X3 || \ 982 CFF_CONFIG_OPTION_DARKENING_PARAMETER_X3 > \ 983 CFF_CONFIG_OPTION_DARKENING_PARAMETER_X4 || \ 984 \ 985 CFF_CONFIG_OPTION_DARKENING_PARAMETER_Y1 > 500 || \ 986 CFF_CONFIG_OPTION_DARKENING_PARAMETER_Y2 > 500 || \ 987 CFF_CONFIG_OPTION_DARKENING_PARAMETER_Y3 > 500 || \ 988 CFF_CONFIG_OPTION_DARKENING_PARAMETER_Y4 > 500 989 #error "Invalid CFF darkening parameters!" 990 #endif 991 992 FT_END_HEADER 993 994 995 #endif /* FTOPTION_H_ */ 996 997 998 /* END */ 999