kc3-lang/freetype/devel/ftoption.h

• Show log

  Commit

• Hash : 640f654b
  Author :
  Date : 2021-06-08T16:45:04
  

  Fix 'devel' build for COLR 'v1'. * devel/ftoption.h: Synchronize with `include/freetype/config/ftoption.h`.

Download

• devel/ftoption.h

• /****************************************************************************
   *
   * ftoption.h (for development)
   *
   *   User-selectable configuration macros (specification only).
   *
   * Copyright (C) 1996-2021 by
   * David Turner, Robert Wilhelm, and Werner Lemberg.
   *
   * This file is part of the FreeType project, and may only be used,
   * modified, and distributed under the terms of the FreeType project
   * license, LICENSE.TXT.  By continuing to use, modify, or distribute
   * this file you indicate that you have read the license and
   * understand and accept it fully.
   *
   */
  
  
  #ifndef FTOPTION_H_
  #define FTOPTION_H_
  
  
  #include <ft2build.h>
  
  
  FT_BEGIN_HEADER
  
    /**************************************************************************
     *
     *                USER-SELECTABLE CONFIGURATION MACROS
     *
     * This file contains the default configuration macro definitions for a
     * standard build of the FreeType library.  There are three ways to use
     * this file to build project-specific versions of the library:
     *
     * - You can modify this file by hand, but this is not recommended in
     *   cases where you would like to build several versions of the library
     *   from a single source directory.
     *
     * - You can put a copy of this file in your build directory, more
     *   precisely in `$BUILD/freetype/config/ftoption.h`, where `$BUILD` is
     *   the name of a directory that is included _before_ the FreeType include
     *   path during compilation.
     *
     *   The default FreeType Makefiles use the build directory
     *   `builds/<system>` by default, but you can easily change that for your
     *   own projects.
     *
     * - Copy the file <ft2build.h> to `$BUILD/ft2build.h` and modify it
     *   slightly to pre-define the macro `FT_CONFIG_OPTIONS_H` used to locate
     *   this file during the build.  For example,
     *
     *   ```
     *     #define FT_CONFIG_OPTIONS_H  <myftoptions.h>
     *     #include <freetype/config/ftheader.h>
     *   ```
     *
     *   will use `$BUILD/myftoptions.h` instead of this file for macro
     *   definitions.
     *
     *   Note also that you can similarly pre-define the macro
     *   `FT_CONFIG_MODULES_H` used to locate the file listing of the modules
     *   that are statically linked to the library at compile time.  By
     *   default, this file is `<freetype/config/ftmodule.h>`.
     *
     * We highly recommend using the third method whenever possible.
     *
     */
  
  
    /*************************************************************************/
    /*************************************************************************/
    /****                                                                 ****/
    /**** 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 ****/
    /****                                                                 ****/
    /*************************************************************************/
    /*************************************************************************/
  
  
    /*#************************************************************************
     *
     * If you enable this configuration option, FreeType recognizes an
     * environment variable called `FREETYPE_PROPERTIES`, which can be used to
     * control the various font drivers and modules.  The controllable
     * properties are listed in the section @properties.
     *
     * You have to undefine this configuration option on platforms that lack
     * the concept of environment variables (and thus don't have the `getenv`
     * function), for example Windows CE.
     *
     * `FREETYPE_PROPERTIES` has the following syntax form (broken here into
     * multiple lines for better readability).
     *
     * ```
     *   <optional whitespace>
     *   <module-name1> ':'
     *   <property-name1> '=' <property-value1>
     *   <whitespace>
     *   <module-name2> ':'
     *   <property-name2> '=' <property-value2>
     *   ...
     * ```
     *
     * Example:
     *
     * ```
     *   FREETYPE_PROPERTIES=truetype:interpreter-version=35 \
     *                       cff:no-stem-darkening=1 \
     *                       autofitter:warping=1
     * ```
     *
     */
  #define FT_CONFIG_OPTION_ENVIRONMENT_PROPERTIES
  
  
    /**************************************************************************
     *
     * Uncomment the line below if you want to activate LCD rendering
     * technology similar to ClearType in this build of the library.  This
     * technology triples the resolution in the direction color subpixels.  To
     * mitigate color fringes inherent to this technology, you also need to
     * explicitly set up LCD filtering.
     *
     * When this macro is not defined, FreeType offers alternative LCD
     * rendering technology that produces excellent output.
     */
  /* #define FT_CONFIG_OPTION_SUBPIXEL_RENDERING */
  
  
    /**************************************************************************
     *
     * Many compilers provide a non-ANSI 64-bit data type that can be used by
     * FreeType to speed up some computations.  However, this will create some
     * problems when compiling the library in strict ANSI mode.
     *
     * For this reason, the use of 64-bit integers is normally disabled when
     * the `__STDC__` macro is defined.  You can however disable this by
     * defining the macro `FT_CONFIG_OPTION_FORCE_INT64` here.
     *
     * For most compilers, this will only create compilation warnings when
     * building the library.
     *
     * ObNote: The compiler-specific 64-bit integers are detected in the
     *         file `ftconfig.h` either statically or through the `configure`
     *         script on supported platforms.
     */
  #undef FT_CONFIG_OPTION_FORCE_INT64
  
  
    /**************************************************************************
     *
     * If this macro is defined, do not try to use an assembler version of
     * performance-critical functions (e.g., @FT_MulFix).  You should only do
     * that to verify that the assembler function works properly, or to execute
     * benchmark tests of the various implementations.
     */
  /* #define FT_CONFIG_OPTION_NO_ASSEMBLER */
  
  
    /**************************************************************************
     *
     * If this macro is defined, try to use an inlined assembler version of the
     * @FT_MulFix function, which is a 'hotspot' when loading and hinting
     * glyphs, and which should be executed as fast as possible.
     *
     * Note that if your compiler or CPU is not supported, this will default to
     * the standard and portable implementation found in `ftcalc.c`.
     */
  #define FT_CONFIG_OPTION_INLINE_MULFIX
  
  
    /**************************************************************************
     *
     * LZW-compressed file support.
     *
     *   FreeType now handles font files that have been compressed with the
     *   `compress` program.  This is mostly used to parse many of the PCF
     *   files that come with various X11 distributions.  The implementation
     *   uses NetBSD's `zopen` to partially uncompress the file on the fly (see
     *   `src/lzw/ftgzip.c`).
     *
     *   Define this macro if you want to enable this 'feature'.
     */
  #define FT_CONFIG_OPTION_USE_LZW
  
  
    /**************************************************************************
     *
     * Gzip-compressed file support.
     *
     *   FreeType now handles font files that have been compressed with the
     *   `gzip` program.  This is mostly used to parse many of the PCF files
     *   that come with XFree86.  The implementation uses 'zlib' to partially
     *   uncompress the file on the fly (see `src/gzip/ftgzip.c`).
     *
     *   Define this macro if you want to enable this 'feature'.  See also the
     *   macro `FT_CONFIG_OPTION_SYSTEM_ZLIB` below.
     */
  #define FT_CONFIG_OPTION_USE_ZLIB
  
  
    /**************************************************************************
     *
     * ZLib library selection
     *
     *   This macro is only used when `FT_CONFIG_OPTION_USE_ZLIB` is defined.
     *   It allows FreeType's 'ftgzip' component to link to the system's
     *   installation of the ZLib library.  This is useful on systems like
     *   Unix or VMS where it generally is already available.
     *
     *   If you let it undefined, the component will use its own copy of the
     *   zlib sources instead.  These have been modified to be included
     *   directly within the component and **not** export external function
     *   names.  This allows you to link any program with FreeType _and_ ZLib
     *   without linking conflicts.
     *
     *   Do not `#undef` this macro here since the build system might define
     *   it for certain configurations only.
     *
     *   If you use a build system like cmake or the `configure` script,
     *   options set by those programs have precedence, overwriting the value
     *   here with the configured one.
     */
  /* #define FT_CONFIG_OPTION_SYSTEM_ZLIB */
  
  
    /**************************************************************************
     *
     * Bzip2-compressed file support.
     *
     *   FreeType now handles font files that have been compressed with the
     *   `bzip2` program.  This is mostly used to parse many of the PCF files
     *   that come with XFree86.  The implementation uses `libbz2` to partially
     *   uncompress the file on the fly (see `src/bzip2/ftbzip2.c`).  Contrary
     *   to gzip, bzip2 currently is not included and need to use the system
     *   available bzip2 implementation.
     *
     *   Define this macro if you want to enable this 'feature'.
     *
     *   If you use a build system like cmake or the `configure` script,
     *   options set by those programs have precedence, overwriting the value
     *   here with the configured one.
     */
  #define FT_CONFIG_OPTION_USE_BZIP2
  
  
    /**************************************************************************
     *
     * Define to disable the use of file stream functions and types, `FILE`,
     * `fopen`, etc.  Enables the use of smaller system libraries on embedded
     * systems that have multiple system libraries, some with or without file
     * stream support, in the cases where file stream support is not necessary
     * such as memory loading of font files.
     */
  /* #define FT_CONFIG_OPTION_DISABLE_STREAM_SUPPORT */
  
  
    /**************************************************************************
     *
     * PNG bitmap support.
     *
     *   FreeType now handles loading color bitmap glyphs in the PNG format.
     *   This requires help from the external libpng library.  Uncompressed
     *   color bitmaps do not need any external libraries and will be supported
     *   regardless of this configuration.
     *
     *   Define this macro if you want to enable this 'feature'.
     *
     *   If you use a build system like cmake or the `configure` script,
     *   options set by those programs have precedence, overwriting the value
     *   here with the configured one.
     */
  #define FT_CONFIG_OPTION_USE_PNG
  
  
    /**************************************************************************
     *
     * HarfBuzz support.
     *
     *   FreeType uses the HarfBuzz library to improve auto-hinting of OpenType
     *   fonts.  If available, many glyphs not directly addressable by a font's
     *   character map will be hinted also.
     *
     *   Define this macro if you want to enable this 'feature'.
     *
     *   If you use a build system like cmake or the `configure` script,
     *   options set by those programs have precedence, overwriting the value
     *   here with the configured one.
     */
  #define FT_CONFIG_OPTION_USE_HARFBUZZ
  
  
    /**************************************************************************
     *
     * Brotli support.
     *
     *   FreeType uses the Brotli library to provide support for decompressing
     *   WOFF2 streams.
     *
     *   Define this macro if you want to enable this 'feature'.
     *
     *   If you use a build system like cmake or the `configure` script,
     *   options set by those programs have precedence, overwriting the value
     *   here with the configured one.
     */
  #define FT_CONFIG_OPTION_USE_BROTLI
  
  
    /**************************************************************************
     *
     * Glyph Postscript Names handling
     *
     *   By default, FreeType 2 is compiled with the 'psnames' module.  This
     *   module is in charge of converting a glyph name string into a Unicode
     *   value, or return a Macintosh standard glyph name for the use with the
     *   TrueType 'post' table.
     *
     *   Undefine this macro if you do not want 'psnames' compiled in your
     *   build of FreeType.  This has the following effects:
     *
     *   - The TrueType driver will provide its own set of glyph names, if you
     *     build it to support postscript names in the TrueType 'post' table,
     *     but will not synthesize a missing Unicode charmap.
     *
     *   - The Type~1 driver will not be able to synthesize a Unicode charmap
     *     out of the glyphs found in the fonts.
     *
     *   You would normally undefine this configuration macro when building a
     *   version of FreeType that doesn't contain a Type~1 or CFF driver.
     */
  #define FT_CONFIG_OPTION_POSTSCRIPT_NAMES
  
  
    /**************************************************************************
     *
     * Postscript Names to Unicode Values support
     *
     *   By default, FreeType~2 is built with the 'psnames' module compiled in.
     *   Among other things, the module is used to convert a glyph name into a
     *   Unicode value.  This is especially useful in order to synthesize on
     *   the fly a Unicode charmap from the CFF/Type~1 driver through a big
     *   table named the 'Adobe Glyph List' (AGL).
     *
     *   Undefine this macro if you do not want the Adobe Glyph List compiled
     *   in your 'psnames' module.  The Type~1 driver will not be able to
     *   synthesize a Unicode charmap out of the glyphs found in the fonts.
     */
  #define FT_CONFIG_OPTION_ADOBE_GLYPH_LIST
  
  
    /**************************************************************************
     *
     * Support for Mac fonts
     *
     *   Define this macro if you want support for outline fonts in Mac format
     *   (mac dfont, mac resource, macbinary containing a mac resource) on
     *   non-Mac platforms.
     *
     *   Note that the 'FOND' resource isn't checked.
     */
  #define FT_CONFIG_OPTION_MAC_FONTS
  
  
    /**************************************************************************
     *
     * Guessing methods to access embedded resource forks
     *
     *   Enable extra Mac fonts support on non-Mac platforms (e.g., GNU/Linux).
     *
     *   Resource forks which include fonts data are stored sometimes in
     *   locations which users or developers don't expected.  In some cases,
     *   resource forks start with some offset from the head of a file.  In
     *   other cases, the actual resource fork is stored in file different from
     *   what the user specifies.  If this option is activated, FreeType tries
     *   to guess whether such offsets or different file names must be used.
     *
     *   Note that normal, direct access of resource forks is controlled via
     *   the `FT_CONFIG_OPTION_MAC_FONTS` option.
     */
  #ifdef FT_CONFIG_OPTION_MAC_FONTS
  #define FT_CONFIG_OPTION_GUESSING_EMBEDDED_RFORK
  #endif
  
  
    /**************************************************************************
     *
     * Allow the use of `FT_Incremental_Interface` to load typefaces that
     * contain no glyph data, but supply it via a callback function.  This is
     * required by clients supporting document formats which supply font data
     * incrementally as the document is parsed, such as the Ghostscript
     * interpreter for the PostScript language.
     */
  #define FT_CONFIG_OPTION_INCREMENTAL
  
  
    /**************************************************************************
     *
     * The size in bytes of the render pool used by the scan-line converter to
     * do all of its work.
     */
  #define FT_RENDER_POOL_SIZE  16384L
  
  
    /**************************************************************************
     *
     * FT_MAX_MODULES
     *
     *   The maximum number of modules that can be registered in a single
     *   FreeType library object.  32~is the default.
     */
  #define FT_MAX_MODULES  32
  
  
    /**************************************************************************
     *
     * Debug level
     *
     *   FreeType can be compiled in debug or trace mode.  In debug mode,
     *   errors are reported through the 'ftdebug' component.  In trace mode,
     *   additional messages are sent to the standard output during execution.
     *
     *   Define `FT_DEBUG_LEVEL_ERROR` to build the library in debug mode.
     *   Define `FT_DEBUG_LEVEL_TRACE` to build it in trace mode.
     *
     *   Don't define any of these macros to compile in 'release' mode!
     *
     *   Do not `#undef` these macros here since the build system might define
     *   them for certain configurations only.
     */
  #define FT_DEBUG_LEVEL_ERROR
  #define FT_DEBUG_LEVEL_TRACE
  
  
    /**************************************************************************
     *
     * Logging
     *
     *   Compiling FreeType in debug or trace mode makes FreeType write error
     *   and trace log messages to `stderr`.  Enabling this macro
     *   automatically forces the `FT_DEBUG_LEVEL_ERROR` and
     *   `FT_DEBUG_LEVEL_TRACE` macros and allows FreeType to write error and
     *   trace log messages to a file instead of `stderr`.  For writing logs
     *   to a file, FreeType uses an the external `dlg` library (the source
     *   code is in `src/dlg`).
     */
  #define FT_DEBUG_LOGGING
  
  
    /**************************************************************************
     *
     * Autofitter debugging
     *
     *   If `FT_DEBUG_AUTOFIT` is defined, FreeType provides some means to
     *   control the autofitter behaviour for debugging purposes with global
     *   boolean variables (consequently, you should **never** enable this
     *   while compiling in 'release' mode):
     *
     *   ```
     *     _af_debug_disable_horz_hints
     *     _af_debug_disable_vert_hints
     *     _af_debug_disable_blue_hints
     *   ```
     *
     *   Additionally, the following functions provide dumps of various
     *   internal autofit structures to stdout (using `printf`):
     *
     *   ```
     *     af_glyph_hints_dump_points
     *     af_glyph_hints_dump_segments
     *     af_glyph_hints_dump_edges
     *     af_glyph_hints_get_num_segments
     *     af_glyph_hints_get_segment_offset
     *   ```
     *
     *   As an argument, they use another global variable:
     *
     *   ```
     *     _af_debug_hints
     *   ```
     *
     *   Please have a look at the `ftgrid` demo program to see how those
     *   variables and macros should be used.
     *
     *   Do not `#undef` these macros here since the build system might define
     *   them for certain configurations only.
     */
  #define FT_DEBUG_AUTOFIT
  
  
    /**************************************************************************
     *
     * Memory Debugging
     *
     *   FreeType now comes with an integrated memory debugger that is capable
     *   of detecting simple errors like memory leaks or double deletes.  To
     *   compile it within your build of the library, you should define
     *   `FT_DEBUG_MEMORY` here.
     *
     *   Note that the memory debugger is only activated at runtime when when
     *   the _environment_ variable `FT2_DEBUG_MEMORY` is defined also!
     *
     *   Do not `#undef` this macro here since the build system might define it
     *   for certain configurations only.
     */
  #define FT_DEBUG_MEMORY
  
  
    /**************************************************************************
     *
     * Module errors
     *
     *   If this macro is set (which is _not_ the default), the higher byte of
     *   an error code gives the module in which the error has occurred, while
     *   the lower byte is the real error code.
     *
     *   Setting this macro makes sense for debugging purposes only, since it
     *   would break source compatibility of certain programs that use
     *   FreeType~2.
     *
     *   More details can be found in the files `ftmoderr.h` and `fterrors.h`.
     */
  #undef FT_CONFIG_OPTION_USE_MODULE_ERRORS
  
  
    /**************************************************************************
     *
     * Error Strings
     *
     *   If this macro is set, `FT_Error_String` will return meaningful
     *   descriptions.  This is not enabled by default to reduce the overall
     *   size of FreeType.
     *
     *   More details can be found in the file `fterrors.h`.
     */
  /* #define FT_CONFIG_OPTION_ERROR_STRINGS */
  
  
    /*************************************************************************/
    /*************************************************************************/
    /****                                                                 ****/
    /****        S F N T   D R I V E R    C O N F I G U R A T I O N       ****/
    /****                                                                 ****/
    /*************************************************************************/
    /*************************************************************************/
  
  
    /**************************************************************************
     *
     * Define `TT_CONFIG_OPTION_EMBEDDED_BITMAPS` if you want to support
     * embedded bitmaps in all formats using the 'sfnt' module (namely
     * TrueType~& OpenType).
     */
  #define TT_CONFIG_OPTION_EMBEDDED_BITMAPS
  
  
    /**************************************************************************
     *
     * Define `TT_CONFIG_OPTION_COLOR_LAYERS` if you want to support colored
     * outlines (from the 'COLR'/'CPAL' tables) in all formats using the 'sfnt'
     * module (namely TrueType~& OpenType).
     */
  #define TT_CONFIG_OPTION_COLOR_LAYERS
  
  
    /**************************************************************************
     *
     * Define `TT_CONFIG_OPTION_POSTSCRIPT_NAMES` if you want to be able to
     * load and enumerate the glyph Postscript names in a TrueType or OpenType
     * file.
     *
     * Note that when you do not compile the 'psnames' module by undefining the
     * above `FT_CONFIG_OPTION_POSTSCRIPT_NAMES`, the 'sfnt' module will
     * contain additional code used to read the PS Names table from a font.
     *
     * (By default, the module uses 'psnames' to extract glyph names.)
     */
  #define TT_CONFIG_OPTION_POSTSCRIPT_NAMES
  
  
    /**************************************************************************
     *
     * Define `TT_CONFIG_OPTION_SFNT_NAMES` if your applications need to access
     * the internal name table in a SFNT-based format like TrueType or
     * OpenType.  The name table contains various strings used to describe the
     * font, like family name, copyright, version, etc.  It does not contain
     * any glyph name though.
     *
     * Accessing SFNT names is done through the functions declared in
     * `ftsnames.h`.
     */
  #define TT_CONFIG_OPTION_SFNT_NAMES
  
  
    /**************************************************************************
     *
     * TrueType CMap support
     *
     *   Here you can fine-tune which TrueType CMap table format shall be
     *   supported.
     */
  #define TT_CONFIG_CMAP_FORMAT_0
  #define TT_CONFIG_CMAP_FORMAT_2
  #define TT_CONFIG_CMAP_FORMAT_4
  #define TT_CONFIG_CMAP_FORMAT_6
  #define TT_CONFIG_CMAP_FORMAT_8
  #define TT_CONFIG_CMAP_FORMAT_10
  #define TT_CONFIG_CMAP_FORMAT_12
  #define TT_CONFIG_CMAP_FORMAT_13
  #define TT_CONFIG_CMAP_FORMAT_14
  
  
    /*************************************************************************/
    /*************************************************************************/
    /****                                                                 ****/
    /****    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   ****/
    /****                                                                 ****/
    /*************************************************************************/
    /*************************************************************************/
  
    /**************************************************************************
     *
     * Define `TT_CONFIG_OPTION_BYTECODE_INTERPRETER` if you want to compile a
     * bytecode interpreter in the TrueType driver.
     *
     * By undefining this, you will only compile the code necessary to load
     * TrueType glyphs without hinting.
     *
     * Do not `#undef` this macro here, since the build system might define it
     * for certain configurations only.
     */
  #define TT_CONFIG_OPTION_BYTECODE_INTERPRETER
  
  
    /**************************************************************************
     *
     * Define `TT_CONFIG_OPTION_SUBPIXEL_HINTING` if you want to compile
     * subpixel hinting support into the TrueType driver.  This modifies the
     * TrueType hinting mechanism when anything but `FT_RENDER_MODE_MONO` is
     * requested.
     *
     * In particular, it modifies the bytecode interpreter to interpret (or
     * not) instructions in a certain way so that all TrueType fonts look like
     * they do in a Windows ClearType (DirectWrite) environment.  See [1] for a
     * technical overview on what this means.  See `ttinterp.h` for more
     * details on the LEAN option.
     *
     * There are three possible values.
     *
     * Value 1:
     *   This value is associated with the 'Infinality' moniker, contributed by
     *   an individual nicknamed Infinality with the goal of making TrueType
     *   fonts render better than on Windows.  A high amount of configurability
     *   and flexibility, down to rules for single glyphs in fonts, but also
     *   very slow.  Its experimental and slow nature and the original
     *   developer losing interest meant that this option was never enabled in
     *   default builds.
     *
     *   The corresponding interpreter version is v38.
     *
     * Value 2:
     *   The new default mode for the TrueType driver.  The Infinality code
     *   base was stripped to the bare minimum and all configurability removed
     *   in the name of speed and simplicity.  The configurability was mainly
     *   aimed at legacy fonts like 'Arial', 'Times New Roman', or 'Courier'.
     *   Legacy fonts are fonts that modify vertical stems to achieve clean
     *   black-and-white bitmaps.  The new mode focuses on applying a minimal
     *   set of rules to all fonts indiscriminately so that modern and web
     *   fonts render well while legacy fonts render okay.
     *
     *   The corresponding interpreter version is v40.
     *
     * Value 3:
     *   Compile both, making both v38 and v40 available (the latter is the
     *   default).
     *
     * By undefining these, you get rendering behavior like on Windows without
     * ClearType, i.e., Windows XP without ClearType enabled and Win9x
     * (interpreter version v35).  Or not, depending on how much hinting blood
     * and testing tears the font designer put into a given font.  If you
     * define one or both subpixel hinting options, you can switch between
     * between v35 and the ones you define (using `FT_Property_Set`).
     *
     * This option requires `TT_CONFIG_OPTION_BYTECODE_INTERPRETER` to be
     * defined.
     *
     * [1]
     * https://www.microsoft.com/typography/cleartype/truetypecleartype.aspx
     */
  /* #define TT_CONFIG_OPTION_SUBPIXEL_HINTING  1     */
  /* #define TT_CONFIG_OPTION_SUBPIXEL_HINTING  2     */
  #define TT_CONFIG_OPTION_SUBPIXEL_HINTING     ( 1 | 2 )
  
  
    /**************************************************************************
     *
     * Define `TT_CONFIG_OPTION_COMPONENT_OFFSET_SCALED` to compile the
     * TrueType glyph loader to use Apple's definition of how to handle
     * component offsets in composite glyphs.
     *
     * Apple and MS disagree on the default behavior of component offsets in
     * composites.  Apple says that they should be scaled by the scaling
     * factors in the transformation matrix (roughly, it's more complex) while
     * MS says they should not.  OpenType defines two bits in the composite
     * flags array which can be used to disambiguate, but old fonts will not
     * have them.
     *
     *   https://www.microsoft.com/typography/otspec/glyf.htm
     *   https://developer.apple.com/fonts/TrueType-Reference-Manual/RM06/Chap6glyf.html
     */
  #undef TT_CONFIG_OPTION_COMPONENT_OFFSET_SCALED
  
  
    /**************************************************************************
     *
     * Define `TT_CONFIG_OPTION_GX_VAR_SUPPORT` if you want to include support
     * for Apple's distortable font technology ('fvar', 'gvar', 'cvar', and
     * 'avar' tables).  Tagged 'Font Variations', this is now part of OpenType
     * also.  This has many similarities to Type~1 Multiple Masters support.
     */
  #define TT_CONFIG_OPTION_GX_VAR_SUPPORT
  
  
    /**************************************************************************
     *
     * Define `TT_CONFIG_OPTION_BDF` if you want to include support for an
     * embedded 'BDF~' table within SFNT-based bitmap formats.
     */
  #define TT_CONFIG_OPTION_BDF
  
  
    /**************************************************************************
     *
     * Option `TT_CONFIG_OPTION_MAX_RUNNABLE_OPCODES` controls the maximum
     * number of bytecode instructions executed for a single run of the
     * bytecode interpreter, needed to prevent infinite loops.  You don't want
     * to change this except for very special situations (e.g., making a
     * library fuzzer spend less time to handle broken fonts).
     *
     * It is not expected that this value is ever modified by a configuring
     * script; instead, it gets surrounded with `#ifndef ... #endif` so that
     * the value can be set as a preprocessor option on the compiler's command
     * line.
     */
  #ifndef TT_CONFIG_OPTION_MAX_RUNNABLE_OPCODES
  #define TT_CONFIG_OPTION_MAX_RUNNABLE_OPCODES  1000000L
  #endif
  
  
    /*************************************************************************/
    /*************************************************************************/
    /****                                                                 ****/
    /****      T Y P E 1   D R I V E R    C O N F I G U R A T I O N       ****/
    /****                                                                 ****/
    /*************************************************************************/
    /*************************************************************************/
  
  
    /**************************************************************************
     *
     * `T1_MAX_DICT_DEPTH` is the maximum depth of nest dictionaries and arrays
     * in the Type~1 stream (see `t1load.c`).  A minimum of~4 is required.
     */
  #define T1_MAX_DICT_DEPTH  5
  
  
    /**************************************************************************
     *
     * `T1_MAX_SUBRS_CALLS` details the maximum number of nested sub-routine
     * calls during glyph loading.
     */
  #define T1_MAX_SUBRS_CALLS  16
  
  
    /**************************************************************************
     *
     * `T1_MAX_CHARSTRING_OPERANDS` is the charstring stack's capacity.  A
     * minimum of~16 is required.
     *
     * The Chinese font 'MingTiEG-Medium' (covering the CNS 11643 character
     * set) needs 256.
     */
  #define T1_MAX_CHARSTRINGS_OPERANDS  256
  
  
    /**************************************************************************
     *
     * Define this configuration macro if you want to prevent the compilation
     * of the 't1afm' module, which is in charge of reading Type~1 AFM files
     * into an existing face.  Note that if set, the Type~1 driver will be
     * unable to produce kerning distances.
     */
  #undef T1_CONFIG_OPTION_NO_AFM
  
  
    /**************************************************************************
     *
     * Define this configuration macro if you want to prevent the compilation
     * of the Multiple Masters font support in the Type~1 driver.
     */
  #undef T1_CONFIG_OPTION_NO_MM_SUPPORT
  
  
    /**************************************************************************
     *
     * `T1_CONFIG_OPTION_OLD_ENGINE` controls whether the pre-Adobe Type~1
     * engine gets compiled into FreeType.  If defined, it is possible to
     * switch between the two engines using the `hinting-engine` property of
     * the 'type1' driver module.
     */
  #define T1_CONFIG_OPTION_OLD_ENGINE
  
  
    /*************************************************************************/
    /*************************************************************************/
    /****                                                                 ****/
    /****         C F F   D R I V E R    C O N F I G U R A T I O N        ****/
    /****                                                                 ****/
    /*************************************************************************/
    /*************************************************************************/
  
  
    /**************************************************************************
     *
     * Using `CFF_CONFIG_OPTION_DARKENING_PARAMETER_{X,Y}{1,2,3,4}` it is
     * possible to set up the default values of the four control points that
     * define the stem darkening behaviour of the (new) CFF engine.  For more
     * details please read the documentation of the `darkening-parameters`
     * property (file `ftdriver.h`), which allows the control at run-time.
     *
     * Do **not** undefine these macros!
     */
  #define CFF_CONFIG_OPTION_DARKENING_PARAMETER_X1   500
  #define CFF_CONFIG_OPTION_DARKENING_PARAMETER_Y1   400
  
  #define CFF_CONFIG_OPTION_DARKENING_PARAMETER_X2  1000
  #define CFF_CONFIG_OPTION_DARKENING_PARAMETER_Y2   275
  
  #define CFF_CONFIG_OPTION_DARKENING_PARAMETER_X3  1667
  #define CFF_CONFIG_OPTION_DARKENING_PARAMETER_Y3   275
  
  #define CFF_CONFIG_OPTION_DARKENING_PARAMETER_X4  2333
  #define CFF_CONFIG_OPTION_DARKENING_PARAMETER_Y4     0
  
  
    /**************************************************************************
     *
     * `CFF_CONFIG_OPTION_OLD_ENGINE` controls whether the pre-Adobe CFF engine
     * gets compiled into FreeType.  If defined, it is possible to switch
     * between the two engines using the `hinting-engine` property of the 'cff'
     * driver module.
     */
  #define CFF_CONFIG_OPTION_OLD_ENGINE
  
  
    /*************************************************************************/
    /*************************************************************************/
    /****                                                                 ****/
    /****         P C F   D R I V E R    C O N F I G U R A T I O N        ****/
    /****                                                                 ****/
    /*************************************************************************/
    /*************************************************************************/
  
  
    /**************************************************************************
     *
     * There are many PCF fonts just called 'Fixed' which look completely
     * different, and which have nothing to do with each other.  When selecting
     * 'Fixed' in KDE or Gnome one gets results that appear rather random, the
     * style changes often if one changes the size and one cannot select some
     * fonts at all.  This option makes the 'pcf' module prepend the foundry
     * name (plus a space) to the family name.
     *
     * We also check whether we have 'wide' characters; all put together, we
     * get family names like 'Sony Fixed' or 'Misc Fixed Wide'.
     *
     * If this option is activated, it can be controlled with the
     * `no-long-family-names` property of the 'pcf' driver module.
     */
  #define PCF_CONFIG_OPTION_LONG_FAMILY_NAMES
  
  
    /*************************************************************************/
    /*************************************************************************/
    /****                                                                 ****/
    /****    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     ****/
    /****                                                                 ****/
    /*************************************************************************/
    /*************************************************************************/
  
  
    /**************************************************************************
     *
     * Compile 'autofit' module with CJK (Chinese, Japanese, Korean) script
     * support.
     */
  #define AF_CONFIG_OPTION_CJK
  
  
    /**************************************************************************
     *
     * Compile 'autofit' module with fallback Indic script support, covering
     * some scripts that the 'latin' submodule of the 'autofit' module doesn't
     * (yet) handle.  Currently, this needs option `AF_CONFIG_OPTION_CJK`.
     */
  #ifdef AF_CONFIG_OPTION_CJK
  #define AF_CONFIG_OPTION_INDIC
  #endif
  
  
    /**************************************************************************
     *
     * Compile 'autofit' module with warp hinting.  The idea of the warping
     * code is to slightly scale and shift a glyph within a single dimension so
     * that as much of its segments are aligned (more or less) on the grid.  To
     * find out the optimal scaling and shifting value, various parameter
     * combinations are tried and scored.
     *
     * You can switch warping on and off with the `warping` property of the
     * auto-hinter (see file `ftdriver.h` for more information; by default it
     * is switched off).
     *
     * This experimental option is not active if the rendering mode is
     * `FT_RENDER_MODE_LIGHT`.
     */
  #define AF_CONFIG_OPTION_USE_WARPER
  
  
    /**************************************************************************
     *
     * Use TrueType-like size metrics for 'light' auto-hinting.
     *
     * It is strongly recommended to avoid this option, which exists only to
     * help some legacy applications retain its appearance and behaviour with
     * respect to auto-hinted TrueType fonts.
     *
     * The very reason this option exists at all are GNU/Linux distributions
     * like Fedora that did not un-patch the following change (which was
     * present in FreeType between versions 2.4.6 and 2.7.1, inclusive).
     *
     * ```
     *   2011-07-16  Steven Chu  <steven.f.chu@gmail.com>
     *
     *     [truetype] Fix metrics on size request for scalable fonts.
     * ```
     *
     * This problematic commit is now reverted (more or less).
     */
  /* #define AF_CONFIG_OPTION_TT_SIZE_METRICS */
  
    /* */
  
  
    /*
     * This macro is obsolete.  Support has been removed in FreeType version
     * 2.5.
     */
  /* #define FT_CONFIG_OPTION_OLD_INTERNALS */
  
  
    /*
     * The next three macros are defined if native TrueType hinting is
     * requested by the definitions above.  Don't change this.
     */
  #ifdef TT_CONFIG_OPTION_BYTECODE_INTERPRETER
  #define  TT_USE_BYTECODE_INTERPRETER
  
  #ifdef TT_CONFIG_OPTION_SUBPIXEL_HINTING
  #if TT_CONFIG_OPTION_SUBPIXEL_HINTING & 1
  #define  TT_SUPPORT_SUBPIXEL_HINTING_INFINALITY
  #endif
  
  #if TT_CONFIG_OPTION_SUBPIXEL_HINTING & 2
  #define  TT_SUPPORT_SUBPIXEL_HINTING_MINIMAL
  #endif
  #endif
  #endif
  
  
    /*
     * The TT_SUPPORT_COLRV1 macro is defined to indicate to clients that this
     * version of FreeType has support for 'COLR' v1 API.  This definition is
     * useful to FreeType clients that want to build in support for 'COLR' v1
     * depending on a tip-of-tree checkout before it is officially released in
     * FreeType, and while the feature cannot yet be tested against using
     * version macros.  Don't change this macro.  This may be removed once the
     * feature is in a FreeType release version and version macros can be used
     * to test for availability.
     */
  #ifdef TT_CONFIG_OPTION_COLOR_LAYERS
  #define  TT_SUPPORT_COLRV1
  #endif
  
  
    /*
     * Check CFF darkening parameters.  The checks are the same as in function
     * `cff_property_set` in file `cffdrivr.c`.
     */
  #if CFF_CONFIG_OPTION_DARKENING_PARAMETER_X1 < 0   || \
      CFF_CONFIG_OPTION_DARKENING_PARAMETER_X2 < 0   || \
      CFF_CONFIG_OPTION_DARKENING_PARAMETER_X3 < 0   || \
      CFF_CONFIG_OPTION_DARKENING_PARAMETER_X4 < 0   || \
                                                        \
      CFF_CONFIG_OPTION_DARKENING_PARAMETER_Y1 < 0   || \
      CFF_CONFIG_OPTION_DARKENING_PARAMETER_Y2 < 0   || \
      CFF_CONFIG_OPTION_DARKENING_PARAMETER_Y3 < 0   || \
      CFF_CONFIG_OPTION_DARKENING_PARAMETER_Y4 < 0   || \
                                                        \
      CFF_CONFIG_OPTION_DARKENING_PARAMETER_X1 >        \
        CFF_CONFIG_OPTION_DARKENING_PARAMETER_X2     || \
      CFF_CONFIG_OPTION_DARKENING_PARAMETER_X2 >        \
        CFF_CONFIG_OPTION_DARKENING_PARAMETER_X3     || \
      CFF_CONFIG_OPTION_DARKENING_PARAMETER_X3 >        \
        CFF_CONFIG_OPTION_DARKENING_PARAMETER_X4     || \
                                                        \
      CFF_CONFIG_OPTION_DARKENING_PARAMETER_Y1 > 500 || \
      CFF_CONFIG_OPTION_DARKENING_PARAMETER_Y2 > 500 || \
      CFF_CONFIG_OPTION_DARKENING_PARAMETER_Y3 > 500 || \
      CFF_CONFIG_OPTION_DARKENING_PARAMETER_Y4 > 500
  #error "Invalid CFF darkening parameters!"
  #endif
  
  FT_END_HEADER
  
  
  #endif /* FTOPTION_H_ */
  
  
  /* END */
  

Download