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
26FT_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#define FT_CONFIG_OPTION_ENVIRONMENT_PROPERTIES
113
114
115 /**************************************************************************
116 *
117 * Uncomment the line below if you want to activate LCD rendering
118 * technology similar to ClearType in this build of the library. This
119 * technology triples the resolution in the direction color subpixels. To
120 * mitigate color fringes inherent to this technology, you also need to
121 * explicitly set up LCD filtering.
122 *
123 * When this macro is not defined, FreeType offers alternative LCD
124 * rendering technology that produces excellent output.
125 */
126#define FT_CONFIG_OPTION_SUBPIXEL_RENDERING
127
128
129 /**************************************************************************
130 *
131 * Many compilers provide a non-ANSI 64-bit data type that can be used by
132 * FreeType to speed up some computations. However, this will create some
133 * problems when compiling the library in strict ANSI mode.
134 *
135 * For this reason, the use of 64-bit integers is normally disabled when
136 * the `__STDC__` macro is defined. You can however disable this by
137 * defining the macro `FT_CONFIG_OPTION_FORCE_INT64` here.
138 *
139 * For most compilers, this will only create compilation warnings when
140 * building the library.
141 *
142 * ObNote: The compiler-specific 64-bit integers are detected in the
143 * file `ftconfig.h` either statically or through the `configure`
144 * script on supported platforms.
145 */
146#undef FT_CONFIG_OPTION_FORCE_INT64
147
148
149 /**************************************************************************
150 *
151 * If this macro is defined, do not try to use an assembler version of
152 * performance-critical functions (e.g., @FT_MulFix). You should only do
153 * that to verify that the assembler function works properly, or to execute
154 * benchmark tests of the various implementations.
155 */
156/* #define FT_CONFIG_OPTION_NO_ASSEMBLER */
157
158
159 /**************************************************************************
160 *
161 * If this macro is defined, try to use an inlined assembler version of the
162 * @FT_MulFix function, which is a 'hotspot' when loading and hinting
163 * glyphs, and which should be executed as fast as possible.
164 *
165 * Note that if your compiler or CPU is not supported, this will default to
166 * the standard and portable implementation found in `ftcalc.c`.
167 */
168#define FT_CONFIG_OPTION_INLINE_MULFIX
169
170
171 /**************************************************************************
172 *
173 * LZW-compressed file support.
174 *
175 * FreeType now handles font files that have been compressed with the
176 * `compress` program. This is mostly used to parse many of the PCF
177 * files that come with various X11 distributions. The implementation
178 * uses NetBSD's `zopen` to partially uncompress the file on the fly (see
179 * `src/lzw/ftgzip.c`).
180 *
181 * Define this macro if you want to enable this 'feature'.
182 */
183#define FT_CONFIG_OPTION_USE_LZW
184
185
186 /**************************************************************************
187 *
188 * Gzip-compressed file support.
189 *
190 * FreeType now handles font files that have been compressed with the
191 * `gzip` program. This is mostly used to parse many of the PCF files
192 * that come with XFree86. The implementation uses 'zlib' to partially
193 * uncompress the file on the fly (see `src/gzip/ftgzip.c`).
194 *
195 * Define this macro if you want to enable this 'feature'. See also the
196 * macro `FT_CONFIG_OPTION_SYSTEM_ZLIB` below.
197 */
198#define FT_CONFIG_OPTION_USE_ZLIB
199
200
201 /**************************************************************************
202 *
203 * ZLib library selection
204 *
205 * This macro is only used when `FT_CONFIG_OPTION_USE_ZLIB` is defined.
206 * It allows FreeType's 'ftgzip' component to link to the system's
207 * installation of the ZLib library. This is useful on systems like
208 * Unix or VMS where it generally is already available.
209 *
210 * If you let it undefined, the component will use its own copy of the
211 * zlib sources instead. These have been modified to be included
212 * directly within the component and **not** export external function
213 * names. This allows you to link any program with FreeType _and_ ZLib
214 * without linking conflicts.
215 *
216 * Do not `#undef` this macro here since the build system might define
217 * it for certain configurations only.
218 *
219 * If you use a build system like cmake or the `configure` script,
220 * options set by those programs have precedence, overwriting the value
221 * here with the configured one.
222 */
223#define FT_CONFIG_OPTION_SYSTEM_ZLIB
224
225
226 /**************************************************************************
227 *
228 * Bzip2-compressed file support.
229 *
230 * FreeType now handles font files that have been compressed with the
231 * `bzip2` program. This is mostly used to parse many of the PCF files
232 * that come with XFree86. The implementation uses `libbz2` to partially
233 * uncompress the file on the fly (see `src/bzip2/ftbzip2.c`). Contrary
234 * to gzip, bzip2 currently is not included and need to use the system
235 * available bzip2 implementation.
236 *
237 * Define this macro if you want to enable this 'feature'.
238 *
239 * If you use a build system like cmake or the `configure` script,
240 * options set by those programs have precedence, overwriting the value
241 * here with the configured one.
242 */
243/* #undef FT_CONFIG_OPTION_USE_BZIP2 */
244
245
246 /**************************************************************************
247 *
248 * Define to disable the use of file stream functions and types, `FILE`,
249 * `fopen`, etc. Enables the use of smaller system libraries on embedded
250 * systems that have multiple system libraries, some with or without file
251 * stream support, in the cases where file stream support is not necessary
252 * such as memory loading of font files.
253 */
254/* #define FT_CONFIG_OPTION_DISABLE_STREAM_SUPPORT */
255
256
257 /**************************************************************************
258 *
259 * PNG bitmap support.
260 *
261 * FreeType now handles loading color bitmap glyphs in the PNG format.
262 * This requires help from the external libpng library. Uncompressed
263 * color bitmaps do not need any external libraries and will be supported
264 * regardless of this configuration.
265 *
266 * Define this macro if you want to enable this 'feature'.
267 *
268 * If you use a build system like cmake or the `configure` script,
269 * options set by those programs have precedence, overwriting the value
270 * here with the configured one.
271 */
272#define FT_CONFIG_OPTION_USE_PNG
273
274
275 /**************************************************************************
276 *
277 * HarfBuzz support.
278 *
279 * FreeType uses the HarfBuzz library to improve auto-hinting of OpenType
280 * fonts. If available, many glyphs not directly addressable by a font's
281 * character map will be hinted also.
282 *
283 * Define this macro if you want to enable this 'feature'.
284 *
285 * If you use a build system like cmake or the `configure` script,
286 * options set by those programs have precedence, overwriting the value
287 * here with the configured one.
288 */
289/* #undef FT_CONFIG_OPTION_USE_HARFBUZZ */
290
291
292 /**************************************************************************
293 *
294 * Brotli support.
295 *
296 * FreeType uses the Brotli library to provide support for decompressing
297 * WOFF2 streams.
298 *
299 * Define this macro if you want to enable this 'feature'.
300 *
301 * If you use a build system like cmake or the `configure` script,
302 * options set by those programs have precedence, overwriting the value
303 * here with the configured one.
304 */
305#define FT_CONFIG_OPTION_USE_BROTLI
306
307
308 /**************************************************************************
309 *
310 * Glyph Postscript Names handling
311 *
312 * By default, FreeType 2 is compiled with the 'psnames' module. This
313 * module is in charge of converting a glyph name string into a Unicode
314 * value, or return a Macintosh standard glyph name for the use with the
315 * TrueType 'post' table.
316 *
317 * Undefine this macro if you do not want 'psnames' compiled in your
318 * build of FreeType. This has the following effects:
319 *
320 * - The TrueType driver will provide its own set of glyph names, if you
321 * build it to support postscript names in the TrueType 'post' table,
322 * but will not synthesize a missing Unicode charmap.
323 *
324 * - The Type~1 driver will not be able to synthesize a Unicode charmap
325 * out of the glyphs found in the fonts.
326 *
327 * You would normally undefine this configuration macro when building a
328 * version of FreeType that doesn't contain a Type~1 or CFF driver.
329 */
330#define FT_CONFIG_OPTION_POSTSCRIPT_NAMES
331
332
333 /**************************************************************************
334 *
335 * Postscript Names to Unicode Values support
336 *
337 * By default, FreeType~2 is built with the 'psnames' module compiled in.
338 * Among other things, the module is used to convert a glyph name into a
339 * Unicode value. This is especially useful in order to synthesize on
340 * the fly a Unicode charmap from the CFF/Type~1 driver through a big
341 * table named the 'Adobe Glyph List' (AGL).
342 *
343 * Undefine this macro if you do not want the Adobe Glyph List compiled
344 * in your 'psnames' module. The Type~1 driver will not be able to
345 * synthesize a Unicode charmap out of the glyphs found in the fonts.
346 */
347#define FT_CONFIG_OPTION_ADOBE_GLYPH_LIST
348
349
350 /**************************************************************************
351 *
352 * Support for Mac fonts
353 *
354 * Define this macro if you want support for outline fonts in Mac format
355 * (mac dfont, mac resource, macbinary containing a mac resource) on
356 * non-Mac platforms.
357 *
358 * Note that the 'FOND' resource isn't checked.
359 */
360#define FT_CONFIG_OPTION_MAC_FONTS
361
362
363 /**************************************************************************
364 *
365 * Guessing methods to access embedded resource forks
366 *
367 * Enable extra Mac fonts support on non-Mac platforms (e.g., GNU/Linux).
368 *
369 * Resource forks which include fonts data are stored sometimes in
370 * locations which users or developers don't expected. In some cases,
371 * resource forks start with some offset from the head of a file. In
372 * other cases, the actual resource fork is stored in file different from
373 * what the user specifies. If this option is activated, FreeType tries
374 * to guess whether such offsets or different file names must be used.
375 *
376 * Note that normal, direct access of resource forks is controlled via
377 * the `FT_CONFIG_OPTION_MAC_FONTS` option.
378 */
379#ifdef FT_CONFIG_OPTION_MAC_FONTS
380#define FT_CONFIG_OPTION_GUESSING_EMBEDDED_RFORK
381#endif
382
383
384 /**************************************************************************
385 *
386 * Allow the use of `FT_Incremental_Interface` to load typefaces that
387 * contain no glyph data, but supply it via a callback function. This is
388 * required by clients supporting document formats which supply font data
389 * incrementally as the document is parsed, such as the Ghostscript
390 * interpreter for the PostScript language.
391 */
392#define FT_CONFIG_OPTION_INCREMENTAL
393
394
395 /**************************************************************************
396 *
397 * The size in bytes of the render pool used by the scan-line converter to
398 * do all of its work.
399 */
400#define FT_RENDER_POOL_SIZE 16384L
401
402
403 /**************************************************************************
404 *
405 * FT_MAX_MODULES
406 *
407 * The maximum number of modules that can be registered in a single
408 * FreeType library object. 32~is the default.
409 */
410#define FT_MAX_MODULES 32
411
412
413 /**************************************************************************
414 *
415 * Debug level
416 *
417 * FreeType can be compiled in debug or trace mode. In debug mode,
418 * errors are reported through the 'ftdebug' component. In trace mode,
419 * additional messages are sent to the standard output during execution.
420 *
421 * Define `FT_DEBUG_LEVEL_ERROR` to build the library in debug mode.
422 * Define `FT_DEBUG_LEVEL_TRACE` to build it in trace mode.
423 *
424 * Don't define any of these macros to compile in 'release' mode!
425 *
426 * Do not `#undef` these macros here since the build system might define
427 * them for certain configurations only.
428 */
429/* #define FT_DEBUG_LEVEL_ERROR */
430/* #define FT_DEBUG_LEVEL_TRACE */
431
432
433 /**************************************************************************
434 *
435 * Logging
436 *
437 * Compiling FreeType in debug or trace mode makes FreeType write error
438 * and trace log messages to `stderr`. Enabling this macro
439 * automatically forces the `FT_DEBUG_LEVEL_ERROR` and
440 * `FT_DEBUG_LEVEL_TRACE` macros and allows FreeType to write error and
441 * trace log messages to a file instead of `stderr`. For writing logs
442 * to a file, FreeType uses an the external `dlg` library (the source
443 * code is in `src/dlg`).
444 *
445 * This option needs a C99 compiler.
446 */
447/* #define FT_DEBUG_LOGGING */
448
449
450 /**************************************************************************
451 *
452 * Autofitter debugging
453 *
454 * If `FT_DEBUG_AUTOFIT` is defined, FreeType provides some means to
455 * control the autofitter behaviour for debugging purposes with global
456 * boolean variables (consequently, you should **never** enable this
457 * while compiling in 'release' mode):
458 *
459 * ```
460 * _af_debug_disable_horz_hints
461 * _af_debug_disable_vert_hints
462 * _af_debug_disable_blue_hints
463 * ```
464 *
465 * Additionally, the following functions provide dumps of various
466 * internal autofit structures to stdout (using `printf`):
467 *
468 * ```
469 * af_glyph_hints_dump_points
470 * af_glyph_hints_dump_segments
471 * af_glyph_hints_dump_edges
472 * af_glyph_hints_get_num_segments
473 * af_glyph_hints_get_segment_offset
474 * ```
475 *
476 * As an argument, they use another global variable:
477 *
478 * ```
479 * _af_debug_hints
480 * ```
481 *
482 * Please have a look at the `ftgrid` demo program to see how those
483 * variables and macros should be used.
484 *
485 * Do not `#undef` these macros here since the build system might define
486 * them for certain configurations only.
487 */
488/* #define FT_DEBUG_AUTOFIT */
489
490
491 /**************************************************************************
492 *
493 * Memory Debugging
494 *
495 * FreeType now comes with an integrated memory debugger that is capable
496 * of detecting simple errors like memory leaks or double deletes. To
497 * compile it within your build of the library, you should define
498 * `FT_DEBUG_MEMORY` here.
499 *
500 * Note that the memory debugger is only activated at runtime when when
501 * the _environment_ variable `FT2_DEBUG_MEMORY` is defined also!
502 *
503 * Do not `#undef` this macro here since the build system might define it
504 * for certain configurations only.
505 */
506/* #define FT_DEBUG_MEMORY */
507
508
509 /**************************************************************************
510 *
511 * Module errors
512 *
513 * If this macro is set (which is _not_ the default), the higher byte of
514 * an error code gives the module in which the error has occurred, while
515 * the lower byte is the real error code.
516 *
517 * Setting this macro makes sense for debugging purposes only, since it
518 * would break source compatibility of certain programs that use
519 * FreeType~2.
520 *
521 * More details can be found in the files `ftmoderr.h` and `fterrors.h`.
522 */
523#undef FT_CONFIG_OPTION_USE_MODULE_ERRORS
524
525
526 /**************************************************************************
527 *
528 * Error Strings
529 *
530 * If this macro is set, `FT_Error_String` will return meaningful
531 * descriptions. This is not enabled by default to reduce the overall
532 * size of FreeType.
533 *
534 * More details can be found in the file `fterrors.h`.
535 */
536/* #define FT_CONFIG_OPTION_ERROR_STRINGS */
537
538
539 /*************************************************************************/
540 /*************************************************************************/
541 /**** ****/
542 /**** S F N T D R I V E R C O N F I G U R A T I O N ****/
543 /**** ****/
544 /*************************************************************************/
545 /*************************************************************************/
546
547
548 /**************************************************************************
549 *
550 * Define `TT_CONFIG_OPTION_EMBEDDED_BITMAPS` if you want to support
551 * embedded bitmaps in all formats using the 'sfnt' module (namely
552 * TrueType~& OpenType).
553 */
554#define TT_CONFIG_OPTION_EMBEDDED_BITMAPS
555
556
557 /**************************************************************************
558 *
559 * Define `TT_CONFIG_OPTION_COLOR_LAYERS` if you want to support colored
560 * outlines (from the 'COLR'/'CPAL' tables) in all formats using the 'sfnt'
561 * module (namely TrueType~& OpenType).
562 */
563#define TT_CONFIG_OPTION_COLOR_LAYERS
564
565
566 /**************************************************************************
567 *
568 * Define `TT_CONFIG_OPTION_POSTSCRIPT_NAMES` if you want to be able to
569 * load and enumerate the glyph Postscript names in a TrueType or OpenType
570 * file.
571 *
572 * Note that when you do not compile the 'psnames' module by undefining the
573 * above `FT_CONFIG_OPTION_POSTSCRIPT_NAMES`, the 'sfnt' module will
574 * contain additional code used to read the PS Names table from a font.
575 *
576 * (By default, the module uses 'psnames' to extract glyph names.)
577 */
578#define TT_CONFIG_OPTION_POSTSCRIPT_NAMES
579
580
581 /**************************************************************************
582 *
583 * Define `TT_CONFIG_OPTION_SFNT_NAMES` if your applications need to access
584 * the internal name table in a SFNT-based format like TrueType or
585 * OpenType. The name table contains various strings used to describe the
586 * font, like family name, copyright, version, etc. It does not contain
587 * any glyph name though.
588 *
589 * Accessing SFNT names is done through the functions declared in
590 * `ftsnames.h`.
591 */
592#define TT_CONFIG_OPTION_SFNT_NAMES
593
594
595 /**************************************************************************
596 *
597 * TrueType CMap support
598 *
599 * Here you can fine-tune which TrueType CMap table format shall be
600 * supported.
601 */
602#define TT_CONFIG_CMAP_FORMAT_0
603#define TT_CONFIG_CMAP_FORMAT_2
604#define TT_CONFIG_CMAP_FORMAT_4
605#define TT_CONFIG_CMAP_FORMAT_6
606#define TT_CONFIG_CMAP_FORMAT_8
607#define TT_CONFIG_CMAP_FORMAT_10
608#define TT_CONFIG_CMAP_FORMAT_12
609#define TT_CONFIG_CMAP_FORMAT_13
610#define TT_CONFIG_CMAP_FORMAT_14
611
612
613 /*************************************************************************/
614 /*************************************************************************/
615 /**** ****/
616 /**** 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 ****/
617 /**** ****/
618 /*************************************************************************/
619 /*************************************************************************/
620
621 /**************************************************************************
622 *
623 * Define `TT_CONFIG_OPTION_BYTECODE_INTERPRETER` if you want to compile a
624 * bytecode interpreter in the TrueType driver.
625 *
626 * By undefining this, you will only compile the code necessary to load
627 * TrueType glyphs without hinting.
628 *
629 * Do not `#undef` this macro here, since the build system might define it
630 * for certain configurations only.
631 */
632#define TT_CONFIG_OPTION_BYTECODE_INTERPRETER
633
634
635 /**************************************************************************
636 *
637 * Define `TT_CONFIG_OPTION_SUBPIXEL_HINTING` if you want to compile
638 * subpixel hinting support into the TrueType driver. This modifies the
639 * TrueType hinting mechanism when anything but `FT_RENDER_MODE_MONO` is
640 * requested.
641 *
642 * In particular, it modifies the bytecode interpreter to interpret (or
643 * not) instructions in a certain way so that all TrueType fonts look like
644 * they do in a Windows ClearType (DirectWrite) environment. See [1] for a
645 * technical overview on what this means. See `ttinterp.h` for more
646 * details on the LEAN option.
647 *
648 * There are three possible values.
649 *
650 * Value 1:
651 * This value is associated with the 'Infinality' moniker, contributed by
652 * an individual nicknamed Infinality with the goal of making TrueType
653 * fonts render better than on Windows. A high amount of configurability
654 * and flexibility, down to rules for single glyphs in fonts, but also
655 * very slow. Its experimental and slow nature and the original
656 * developer losing interest meant that this option was never enabled in
657 * default builds.
658 *
659 * The corresponding interpreter version is v38.
660 *
661 * Value 2:
662 * The new default mode for the TrueType driver. The Infinality code
663 * base was stripped to the bare minimum and all configurability removed
664 * in the name of speed and simplicity. The configurability was mainly
665 * aimed at legacy fonts like 'Arial', 'Times New Roman', or 'Courier'.
666 * Legacy fonts are fonts that modify vertical stems to achieve clean
667 * black-and-white bitmaps. The new mode focuses on applying a minimal
668 * set of rules to all fonts indiscriminately so that modern and web
669 * fonts render well while legacy fonts render okay.
670 *
671 * The corresponding interpreter version is v40.
672 *
673 * Value 3:
674 * Compile both, making both v38 and v40 available (the latter is the
675 * default).
676 *
677 * By undefining these, you get rendering behavior like on Windows without
678 * ClearType, i.e., Windows XP without ClearType enabled and Win9x
679 * (interpreter version v35). Or not, depending on how much hinting blood
680 * and testing tears the font designer put into a given font. If you
681 * define one or both subpixel hinting options, you can switch between
682 * between v35 and the ones you define (using `FT_Property_Set`).
683 *
684 * This option requires `TT_CONFIG_OPTION_BYTECODE_INTERPRETER` to be
685 * defined.
686 *
687 * [1]
688 * https://www.microsoft.com/typography/cleartype/truetypecleartype.aspx
689 */
690/* #define TT_CONFIG_OPTION_SUBPIXEL_HINTING 1 */
691#define TT_CONFIG_OPTION_SUBPIXEL_HINTING 2
692/* #define TT_CONFIG_OPTION_SUBPIXEL_HINTING ( 1 | 2 ) */
693
694
695 /**************************************************************************
696 *
697 * Define `TT_CONFIG_OPTION_COMPONENT_OFFSET_SCALED` to compile the
698 * TrueType glyph loader to use Apple's definition of how to handle
699 * component offsets in composite glyphs.
700 *
701 * Apple and MS disagree on the default behavior of component offsets in
702 * composites. Apple says that they should be scaled by the scaling
703 * factors in the transformation matrix (roughly, it's more complex) while
704 * MS says they should not. OpenType defines two bits in the composite
705 * flags array which can be used to disambiguate, but old fonts will not
706 * have them.
707 *
708 * https://www.microsoft.com/typography/otspec/glyf.htm
709 * https://developer.apple.com/fonts/TrueType-Reference-Manual/RM06/Chap6glyf.html
710 */
711#undef TT_CONFIG_OPTION_COMPONENT_OFFSET_SCALED
712
713
714 /**************************************************************************
715 *
716 * Define `TT_CONFIG_OPTION_GX_VAR_SUPPORT` if you want to include support
717 * for Apple's distortable font technology ('fvar', 'gvar', 'cvar', and
718 * 'avar' tables). Tagged 'Font Variations', this is now part of OpenType
719 * also. This has many similarities to Type~1 Multiple Masters support.
720 */
721#define TT_CONFIG_OPTION_GX_VAR_SUPPORT
722
723
724 /**************************************************************************
725 *
726 * Define `TT_CONFIG_OPTION_BDF` if you want to include support for an
727 * embedded 'BDF~' table within SFNT-based bitmap formats.
728 */
729#define TT_CONFIG_OPTION_BDF
730
731
732 /**************************************************************************
733 *
734 * Option `TT_CONFIG_OPTION_MAX_RUNNABLE_OPCODES` controls the maximum
735 * number of bytecode instructions executed for a single run of the
736 * bytecode interpreter, needed to prevent infinite loops. You don't want
737 * to change this except for very special situations (e.g., making a
738 * library fuzzer spend less time to handle broken fonts).
739 *
740 * It is not expected that this value is ever modified by a configuring
741 * script; instead, it gets surrounded with `#ifndef ... #endif` so that
742 * the value can be set as a preprocessor option on the compiler's command
743 * line.
744 */
745#ifndef TT_CONFIG_OPTION_MAX_RUNNABLE_OPCODES
746#define TT_CONFIG_OPTION_MAX_RUNNABLE_OPCODES 1000000L
747#endif
748
749
750 /*************************************************************************/
751 /*************************************************************************/
752 /**** ****/
753 /**** T Y P E 1 D R I V E R C O N F I G U R A T I O N ****/
754 /**** ****/
755 /*************************************************************************/
756 /*************************************************************************/
757
758
759 /**************************************************************************
760 *
761 * `T1_MAX_DICT_DEPTH` is the maximum depth of nest dictionaries and arrays
762 * in the Type~1 stream (see `t1load.c`). A minimum of~4 is required.
763 */
764#define T1_MAX_DICT_DEPTH 5
765
766
767 /**************************************************************************
768 *
769 * `T1_MAX_SUBRS_CALLS` details the maximum number of nested sub-routine
770 * calls during glyph loading.
771 */
772#define T1_MAX_SUBRS_CALLS 16
773
774
775 /**************************************************************************
776 *
777 * `T1_MAX_CHARSTRING_OPERANDS` is the charstring stack's capacity. A
778 * minimum of~16 is required.
779 *
780 * The Chinese font 'MingTiEG-Medium' (covering the CNS 11643 character
781 * set) needs 256.
782 */
783#define T1_MAX_CHARSTRINGS_OPERANDS 256
784
785
786 /**************************************************************************
787 *
788 * Define this configuration macro if you want to prevent the compilation
789 * of the 't1afm' module, which is in charge of reading Type~1 AFM files
790 * into an existing face. Note that if set, the Type~1 driver will be
791 * unable to produce kerning distances.
792 */
793#undef T1_CONFIG_OPTION_NO_AFM
794
795
796 /**************************************************************************
797 *
798 * Define this configuration macro if you want to prevent the compilation
799 * of the Multiple Masters font support in the Type~1 driver.
800 */
801#undef T1_CONFIG_OPTION_NO_MM_SUPPORT
802
803
804 /**************************************************************************
805 *
806 * `T1_CONFIG_OPTION_OLD_ENGINE` controls whether the pre-Adobe Type~1
807 * engine gets compiled into FreeType. If defined, it is possible to
808 * switch between the two engines using the `hinting-engine` property of
809 * the 'type1' driver module.
810 */
811/* #define T1_CONFIG_OPTION_OLD_ENGINE */
812
813
814 /*************************************************************************/
815 /*************************************************************************/
816 /**** ****/
817 /**** C F F D R I V E R C O N F I G U R A T I O N ****/
818 /**** ****/
819 /*************************************************************************/
820 /*************************************************************************/
821
822
823 /**************************************************************************
824 *
825 * Using `CFF_CONFIG_OPTION_DARKENING_PARAMETER_{X,Y}{1,2,3,4}` it is
826 * possible to set up the default values of the four control points that
827 * define the stem darkening behaviour of the (new) CFF engine. For more
828 * details please read the documentation of the `darkening-parameters`
829 * property (file `ftdriver.h`), which allows the control at run-time.
830 *
831 * Do **not** undefine these macros!
832 */
833#define CFF_CONFIG_OPTION_DARKENING_PARAMETER_X1 500
834#define CFF_CONFIG_OPTION_DARKENING_PARAMETER_Y1 400
835
836#define CFF_CONFIG_OPTION_DARKENING_PARAMETER_X2 1000
837#define CFF_CONFIG_OPTION_DARKENING_PARAMETER_Y2 275
838
839#define CFF_CONFIG_OPTION_DARKENING_PARAMETER_X3 1667
840#define CFF_CONFIG_OPTION_DARKENING_PARAMETER_Y3 275
841
842#define CFF_CONFIG_OPTION_DARKENING_PARAMETER_X4 2333
843#define CFF_CONFIG_OPTION_DARKENING_PARAMETER_Y4 0
844
845
846 /**************************************************************************
847 *
848 * `CFF_CONFIG_OPTION_OLD_ENGINE` controls whether the pre-Adobe CFF engine
849 * gets compiled into FreeType. If defined, it is possible to switch
850 * between the two engines using the `hinting-engine` property of the 'cff'
851 * driver module.
852 */
853/* #define CFF_CONFIG_OPTION_OLD_ENGINE */
854
855
856 /*************************************************************************/
857 /*************************************************************************/
858 /**** ****/
859 /**** P C F D R I V E R C O N F I G U R A T I O N ****/
860 /**** ****/
861 /*************************************************************************/
862 /*************************************************************************/
863
864
865 /**************************************************************************
866 *
867 * There are many PCF fonts just called 'Fixed' which look completely
868 * different, and which have nothing to do with each other. When selecting
869 * 'Fixed' in KDE or Gnome one gets results that appear rather random, the
870 * style changes often if one changes the size and one cannot select some
871 * fonts at all. This option makes the 'pcf' module prepend the foundry
872 * name (plus a space) to the family name.
873 *
874 * We also check whether we have 'wide' characters; all put together, we
875 * get family names like 'Sony Fixed' or 'Misc Fixed Wide'.
876 *
877 * If this option is activated, it can be controlled with the
878 * `no-long-family-names` property of the 'pcf' driver module.
879 */
880/* #define PCF_CONFIG_OPTION_LONG_FAMILY_NAMES */
881
882
883 /*************************************************************************/
884 /*************************************************************************/
885 /**** ****/
886 /**** 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 ****/
887 /**** ****/
888 /*************************************************************************/
889 /*************************************************************************/
890
891
892 /**************************************************************************
893 *
894 * Compile 'autofit' module with CJK (Chinese, Japanese, Korean) script
895 * support.
896 */
897#define AF_CONFIG_OPTION_CJK
898
899
900 /**************************************************************************
901 *
902 * Compile 'autofit' module with fallback Indic script support, covering
903 * some scripts that the 'latin' submodule of the 'autofit' module doesn't
904 * (yet) handle. Currently, this needs option `AF_CONFIG_OPTION_CJK`.
905 */
906#ifdef AF_CONFIG_OPTION_CJK
907#define AF_CONFIG_OPTION_INDIC
908#endif
909
910
911 /**************************************************************************
912 *
913 * Use TrueType-like size metrics for 'light' auto-hinting.
914 *
915 * It is strongly recommended to avoid this option, which exists only to
916 * help some legacy applications retain its appearance and behaviour with
917 * respect to auto-hinted TrueType fonts.
918 *
919 * The very reason this option exists at all are GNU/Linux distributions
920 * like Fedora that did not un-patch the following change (which was
921 * present in FreeType between versions 2.4.6 and 2.7.1, inclusive).
922 *
923 * ```
924 * 2011-07-16 Steven Chu <steven.f.chu@gmail.com>
925 *
926 * [truetype] Fix metrics on size request for scalable fonts.
927 * ```
928 *
929 * This problematic commit is now reverted (more or less).
930 */
931/* #define AF_CONFIG_OPTION_TT_SIZE_METRICS */
932
933 /* */
934
935
936 /*
937 * This macro is obsolete. Support has been removed in FreeType version
938 * 2.5.
939 */
940/* #define FT_CONFIG_OPTION_OLD_INTERNALS */
941
942
943 /*
944 * The next three macros are defined if native TrueType hinting is
945 * requested by the definitions above. Don't change this.
946 */
947#ifdef TT_CONFIG_OPTION_BYTECODE_INTERPRETER
948#define TT_USE_BYTECODE_INTERPRETER
949
950#ifdef TT_CONFIG_OPTION_SUBPIXEL_HINTING
951#if TT_CONFIG_OPTION_SUBPIXEL_HINTING & 1
952#define TT_SUPPORT_SUBPIXEL_HINTING_INFINALITY
953#endif
954
955#if TT_CONFIG_OPTION_SUBPIXEL_HINTING & 2
956#define TT_SUPPORT_SUBPIXEL_HINTING_MINIMAL
957#endif
958#endif
959#endif
960
961
962 /*
963 * The TT_SUPPORT_COLRV1 macro is defined to indicate to clients that this
964 * version of FreeType has support for 'COLR' v1 API. This definition is
965 * useful to FreeType clients that want to build in support for 'COLR' v1
966 * depending on a tip-of-tree checkout before it is officially released in
967 * FreeType, and while the feature cannot yet be tested against using
968 * version macros. Don't change this macro. This may be removed once the
969 * feature is in a FreeType release version and version macros can be used
970 * to test for availability.
971 */
972#ifdef TT_CONFIG_OPTION_COLOR_LAYERS
973#define TT_SUPPORT_COLRV1
974#endif
975
976
977 /*
978 * Check CFF darkening parameters. The checks are the same as in function
979 * `cff_property_set` in file `cffdrivr.c`.
980 */
981#if CFF_CONFIG_OPTION_DARKENING_PARAMETER_X1 < 0 || \
982 CFF_CONFIG_OPTION_DARKENING_PARAMETER_X2 < 0 || \
983 CFF_CONFIG_OPTION_DARKENING_PARAMETER_X3 < 0 || \
984 CFF_CONFIG_OPTION_DARKENING_PARAMETER_X4 < 0 || \
985 \
986 CFF_CONFIG_OPTION_DARKENING_PARAMETER_Y1 < 0 || \
987 CFF_CONFIG_OPTION_DARKENING_PARAMETER_Y2 < 0 || \
988 CFF_CONFIG_OPTION_DARKENING_PARAMETER_Y3 < 0 || \
989 CFF_CONFIG_OPTION_DARKENING_PARAMETER_Y4 < 0 || \
990 \
991 CFF_CONFIG_OPTION_DARKENING_PARAMETER_X1 > \
992 CFF_CONFIG_OPTION_DARKENING_PARAMETER_X2 || \
993 CFF_CONFIG_OPTION_DARKENING_PARAMETER_X2 > \
994 CFF_CONFIG_OPTION_DARKENING_PARAMETER_X3 || \
995 CFF_CONFIG_OPTION_DARKENING_PARAMETER_X3 > \
996 CFF_CONFIG_OPTION_DARKENING_PARAMETER_X4 || \
997 \
998 CFF_CONFIG_OPTION_DARKENING_PARAMETER_Y1 > 500 || \
999 CFF_CONFIG_OPTION_DARKENING_PARAMETER_Y2 > 500 || \
1000 CFF_CONFIG_OPTION_DARKENING_PARAMETER_Y3 > 500 || \
1001 CFF_CONFIG_OPTION_DARKENING_PARAMETER_Y4 > 500
1002#error "Invalid CFF darkening parameters!"
1003#endif
1004
1005FT_END_HEADER
1006
1007
1008#endif /* FTOPTION_H_ */
1009
1010
1011/* END */
1012

source code of include/freetype2/freetype/config/ftoption.h