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      1 /***************************************************************************/
      2 /*                                                                         */
      3 /*  ftoption.h                                                             */
      4 /*                                                                         */
      5 /*    User-selectable configuration macros (specification only).           */
      6 /*                                                                         */
      7 /*  Copyright 1996-2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009,   */
      8 /*            2010 by                                                      */
      9 /*  David Turner, Robert Wilhelm, and Werner Lemberg.                      */
     10 /*                                                                         */
     11 /*  This file is part of the FreeType project, and may only be used,       */
     12 /*  modified, and distributed under the terms of the FreeType project      */
     13 /*  license, LICENSE.TXT.  By continuing to use, modify, or distribute     */
     14 /*  this file you indicate that you have read the license and              */
     15 /*  understand and accept it fully.                                        */
     16 /*                                                                         */
     17 /***************************************************************************/
     18 
     19 
     20 #ifndef __FTOPTION_H__
     21 #define __FTOPTION_H__
     22 
     23 
     24 #include <ft2build.h>
     25 
     26 
     27 FT_BEGIN_HEADER
     28 
     29   /*************************************************************************/
     30   /*                                                                       */
     31   /*                 USER-SELECTABLE CONFIGURATION MACROS                  */
     32   /*                                                                       */
     33   /* This file contains the default configuration macro definitions for    */
     34   /* a standard build of the FreeType library.  There are three ways to    */
     35   /* use this file to build project-specific versions of the library:      */
     36   /*                                                                       */
     37   /*  - You can modify this file by hand, but this is not recommended in   */
     38   /*    cases where you would like to build several versions of the        */
     39   /*    library from a single source directory.                            */
     40   /*                                                                       */
     41   /*  - You can put a copy of this file in your build directory, more      */
     42   /*    precisely in `$BUILD/freetype/config/ftoption.h', where `$BUILD'   */
     43   /*    is the name of a directory that is included _before_ the FreeType  */
     44   /*    include path during compilation.                                   */
     45   /*                                                                       */
     46   /*    The default FreeType Makefiles and Jamfiles use the build          */
     47   /*    directory `builds/<system>' by default, but you can easily change  */
     48   /*    that for your own projects.                                        */
     49   /*                                                                       */
     50   /*  - Copy the file <ft2build.h> to `$BUILD/ft2build.h' and modify it    */
     51   /*    slightly to pre-define the macro FT_CONFIG_OPTIONS_H used to       */
     52   /*    locate this file during the build.  For example,                   */
     53   /*                                                                       */
     54   /*      #define FT_CONFIG_OPTIONS_H  <myftoptions.h>                     */
     55   /*      #include <freetype/config/ftheader.h>                            */
     56   /*                                                                       */
     57   /*    will use `$BUILD/myftoptions.h' instead of this file for macro     */
     58   /*    definitions.                                                       */
     59   /*                                                                       */
     60   /*    Note also that you can similarly pre-define the macro              */
     61   /*    FT_CONFIG_MODULES_H used to locate the file listing of the modules */
     62   /*    that are statically linked to the library at compile time.  By     */
     63   /*    default, this file is <freetype/config/ftmodule.h>.                */
     64   /*                                                                       */
     65   /*  We highly recommend using the third method whenever possible.        */
     66   /*                                                                       */
     67   /*************************************************************************/
     68 
     69 
     70   /*************************************************************************/
     71   /*************************************************************************/
     72   /****                                                                 ****/
     73   /**** 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 ****/
     74   /****                                                                 ****/
     75   /*************************************************************************/
     76   /*************************************************************************/
     77 
     78 
     79   /*************************************************************************/
     80   /*                                                                       */
     81   /* Uncomment the line below if you want to activate sub-pixel rendering  */
     82   /* (a.k.a. LCD rendering, or ClearType) in this build of the library.    */
     83   /*                                                                       */
     84   /* Note that this feature is covered by several Microsoft patents        */
     85   /* and should not be activated in any default build of the library.      */
     86   /*                                                                       */
     87   /* This macro has no impact on the FreeType API, only on its             */
     88   /* _implementation_.  For example, using FT_RENDER_MODE_LCD when calling */
     89   /* FT_Render_Glyph still generates a bitmap that is 3 times wider than   */
     90   /* the original size in case this macro isn't defined; however, each     */
     91   /* triplet of subpixels has R=G=B.                                       */
     92   /*                                                                       */
     93   /* This is done to allow FreeType clients to run unmodified, forcing     */
     94   /* them to display normal gray-level anti-aliased glyphs.                */
     95   /*                                                                       */
     96 /* #define FT_CONFIG_OPTION_SUBPIXEL_RENDERING */
     97 
     98 
     99   /*************************************************************************/
    100   /*                                                                       */
    101   /* Many compilers provide a non-ANSI 64-bit data type that can be used   */
    102   /* by FreeType to speed up some computations.  However, this will create */
    103   /* some problems when compiling the library in strict ANSI mode.         */
    104   /*                                                                       */
    105   /* For this reason, the use of 64-bit integers is normally disabled when */
    106   /* the __STDC__ macro is defined.  You can however disable this by       */
    107   /* defining the macro FT_CONFIG_OPTION_FORCE_INT64 here.                 */
    108   /*                                                                       */
    109   /* For most compilers, this will only create compilation warnings when   */
    110   /* building the library.                                                 */
    111   /*                                                                       */
    112   /* ObNote: The compiler-specific 64-bit integers are detected in the     */
    113   /*         file `ftconfig.h' either statically or through the            */
    114   /*         `configure' script on supported platforms.                    */
    115   /*                                                                       */
    116 #undef FT_CONFIG_OPTION_FORCE_INT64
    117 
    118 
    119   /*************************************************************************/
    120   /*                                                                       */
    121   /* If this macro is defined, do not try to use an assembler version of   */
    122   /* performance-critical functions (e.g. FT_MulFix).  You should only do  */
    123   /* that to verify that the assembler function works properly, or to      */
    124   /* execute benchmark tests of the various implementations.               */
    125 /* #define FT_CONFIG_OPTION_NO_ASSEMBLER */
    126 
    127 
    128   /*************************************************************************/
    129   /*                                                                       */
    130   /* If this macro is defined, try to use an inlined assembler version of  */
    131   /* the `FT_MulFix' function, which is a `hotspot' when loading and       */
    132   /* hinting glyphs, and which should be executed as fast as possible.     */
    133   /*                                                                       */
    134   /* Note that if your compiler or CPU is not supported, this will default */
    135   /* to the standard and portable implementation found in `ftcalc.c'.      */
    136   /*                                                                       */
    137 #define FT_CONFIG_OPTION_INLINE_MULFIX
    138 
    139 
    140   /*************************************************************************/
    141   /*                                                                       */
    142   /* LZW-compressed file support.                                          */
    143   /*                                                                       */
    144   /*   FreeType now handles font files that have been compressed with the  */
    145   /*   `compress' program.  This is mostly used to parse many of the PCF   */
    146   /*   files that come with various X11 distributions.  The implementation */
    147   /*   uses NetBSD's `zopen' to partially uncompress the file on the fly   */
    148   /*   (see src/lzw/ftgzip.c).                                             */
    149   /*                                                                       */
    150   /*   Define this macro if you want to enable this `feature'.             */
    151   /*                                                                       */
    152 #define FT_CONFIG_OPTION_USE_LZW
    153 
    154 
    155   /*************************************************************************/
    156   /*                                                                       */
    157   /* Gzip-compressed file support.                                         */
    158   /*                                                                       */
    159   /*   FreeType now handles font files that have been compressed with the  */
    160   /*   `gzip' program.  This is mostly used to parse many of the PCF files */
    161   /*   that come with XFree86.  The implementation uses `zlib' to          */
    162   /*   partially uncompress the file on the fly (see src/gzip/ftgzip.c).   */
    163   /*                                                                       */
    164   /*   Define this macro if you want to enable this `feature'.  See also   */
    165   /*   the macro FT_CONFIG_OPTION_SYSTEM_ZLIB below.                       */
    166   /*                                                                       */
    167 #define FT_CONFIG_OPTION_USE_ZLIB
    168 
    169 
    170   /*************************************************************************/
    171   /*                                                                       */
    172   /* ZLib library selection                                                */
    173   /*                                                                       */
    174   /*   This macro is only used when FT_CONFIG_OPTION_USE_ZLIB is defined.  */
    175   /*   It allows FreeType's `ftgzip' component to link to the system's     */
    176   /*   installation of the ZLib library.  This is useful on systems like   */
    177   /*   Unix or VMS where it generally is already available.                */
    178   /*                                                                       */
    179   /*   If you let it undefined, the component will use its own copy        */
    180   /*   of the zlib sources instead.  These have been modified to be        */
    181   /*   included directly within the component and *not* export external    */
    182   /*   function names.  This allows you to link any program with FreeType  */
    183   /*   _and_ ZLib without linking conflicts.                               */
    184   /*                                                                       */
    185   /*   Do not #undef this macro here since the build system might define   */
    186   /*   it for certain configurations only.                                 */
    187   /*                                                                       */
    188 /* #define FT_CONFIG_OPTION_SYSTEM_ZLIB */
    189 
    190 
    191   /*************************************************************************/
    192   /*                                                                       */
    193   /* DLL export compilation                                                */
    194   /*                                                                       */
    195   /*   When compiling FreeType as a DLL, some systems/compilers need a     */
    196   /*   special keyword in front OR after the return type of function       */
    197   /*   declarations.                                                       */
    198   /*                                                                       */
    199   /*   Two macros are used within the FreeType source code to define       */
    200   /*   exported library functions: FT_EXPORT and FT_EXPORT_DEF.            */
    201   /*                                                                       */
    202   /*     FT_EXPORT( return_type )                                          */
    203   /*                                                                       */
    204   /*       is used in a function declaration, as in                        */
    205   /*                                                                       */
    206   /*         FT_EXPORT( FT_Error )                                         */
    207   /*         FT_Init_FreeType( FT_Library*  alibrary );                    */
    208   /*                                                                       */
    209   /*                                                                       */
    210   /*     FT_EXPORT_DEF( return_type )                                      */
    211   /*                                                                       */
    212   /*       is used in a function definition, as in                         */
    213   /*                                                                       */
    214   /*         FT_EXPORT_DEF( FT_Error )                                     */
    215   /*         FT_Init_FreeType( FT_Library*  alibrary )                     */
    216   /*         {                                                             */
    217   /*           ... some code ...                                           */
    218   /*           return FT_Err_Ok;                                           */
    219   /*         }                                                             */
    220   /*                                                                       */
    221   /*   You can provide your own implementation of FT_EXPORT and            */
    222   /*   FT_EXPORT_DEF here if you want.  If you leave them undefined, they  */
    223   /*   will be later automatically defined as `extern return_type' to      */
    224   /*   allow normal compilation.                                           */
    225   /*                                                                       */
    226   /*   Do not #undef these macros here since the build system might define */
    227   /*   them for certain configurations only.                               */
    228   /*                                                                       */
    229 /* #define FT_EXPORT(x)      extern x */
    230 /* #define FT_EXPORT_DEF(x)  x */
    231 
    232 
    233   /*************************************************************************/
    234   /*                                                                       */
    235   /* Glyph Postscript Names handling                                       */
    236   /*                                                                       */
    237   /*   By default, FreeType 2 is compiled with the `psnames' module.  This */
    238   /*   module is in charge of converting a glyph name string into a        */
    239   /*   Unicode value, or return a Macintosh standard glyph name for the    */
    240   /*   use with the TrueType `post' table.                                 */
    241   /*                                                                       */
    242   /*   Undefine this macro if you do not want `psnames' compiled in your   */
    243   /*   build of FreeType.  This has the following effects:                 */
    244   /*                                                                       */
    245   /*   - The TrueType driver will provide its own set of glyph names,      */
    246   /*     if you build it to support postscript names in the TrueType       */
    247   /*     `post' table.                                                     */
    248   /*                                                                       */
    249   /*   - The Type 1 driver will not be able to synthesize a Unicode        */
    250   /*     charmap out of the glyphs found in the fonts.                     */
    251   /*                                                                       */
    252   /*   You would normally undefine this configuration macro when building  */
    253   /*   a version of FreeType that doesn't contain a Type 1 or CFF driver.  */
    254   /*                                                                       */
    255 #define FT_CONFIG_OPTION_POSTSCRIPT_NAMES
    256 
    257 
    258   /*************************************************************************/
    259   /*                                                                       */
    260   /* Postscript Names to Unicode Values support                            */
    261   /*                                                                       */
    262   /*   By default, FreeType 2 is built with the `PSNames' module compiled  */
    263   /*   in.  Among other things, the module is used to convert a glyph name */
    264   /*   into a Unicode value.  This is especially useful in order to        */
    265   /*   synthesize on the fly a Unicode charmap from the CFF/Type 1 driver  */
    266   /*   through a big table named the `Adobe Glyph List' (AGL).             */
    267   /*                                                                       */
    268   /*   Undefine this macro if you do not want the Adobe Glyph List         */
    269   /*   compiled in your `PSNames' module.  The Type 1 driver will not be   */
    270   /*   able to synthesize a Unicode charmap out of the glyphs found in the */
    271   /*   fonts.                                                              */
    272   /*                                                                       */
    273 #define FT_CONFIG_OPTION_ADOBE_GLYPH_LIST
    274 
    275 
    276   /*************************************************************************/
    277   /*                                                                       */
    278   /* Support for Mac fonts                                                 */
    279   /*                                                                       */
    280   /*   Define this macro if you want support for outline fonts in Mac      */
    281   /*   format (mac dfont, mac resource, macbinary containing a mac         */
    282   /*   resource) on non-Mac platforms.                                     */
    283   /*                                                                       */
    284   /*   Note that the `FOND' resource isn't checked.                        */
    285   /*                                                                       */
    286 #define FT_CONFIG_OPTION_MAC_FONTS
    287 
    288 
    289   /*************************************************************************/
    290   /*                                                                       */
    291   /* Guessing methods to access embedded resource forks                    */
    292   /*                                                                       */
    293   /*   Enable extra Mac fonts support on non-Mac platforms (e.g.           */
    294   /*   GNU/Linux).                                                         */
    295   /*                                                                       */
    296   /*   Resource forks which include fonts data are stored sometimes in     */
    297   /*   locations which users or developers don't expected.  In some cases, */
    298   /*   resource forks start with some offset from the head of a file.  In  */
    299   /*   other cases, the actual resource fork is stored in file different   */
    300   /*   from what the user specifies.  If this option is activated,         */
    301   /*   FreeType tries to guess whether such offsets or different file      */
    302   /*   names must be used.                                                 */
    303   /*                                                                       */
    304   /*   Note that normal, direct access of resource forks is controlled via */
    305   /*   the FT_CONFIG_OPTION_MAC_FONTS option.                              */
    306   /*                                                                       */
    307 #ifdef FT_CONFIG_OPTION_MAC_FONTS
    308 #define FT_CONFIG_OPTION_GUESSING_EMBEDDED_RFORK
    309 #endif
    310 
    311 
    312   /*************************************************************************/
    313   /*                                                                       */
    314   /* Allow the use of FT_Incremental_Interface to load typefaces that      */
    315   /* contain no glyph data, but supply it via a callback function.         */
    316   /* This is required by clients supporting document formats which         */
    317   /* supply font data incrementally as the document is parsed, such        */
    318   /* as the Ghostscript interpreter for the PostScript language.           */
    319   /*                                                                       */
    320 /* #define FT_CONFIG_OPTION_INCREMENTAL */
    321 
    322 
    323   /*************************************************************************/
    324   /*                                                                       */
    325   /* The size in bytes of the render pool used by the scan-line converter  */
    326   /* to do all of its work.                                                */
    327   /*                                                                       */
    328   /* This must be greater than 4KByte if you use FreeType to rasterize     */
    329   /* glyphs; otherwise, you may set it to zero to avoid unnecessary        */
    330   /* allocation of the render pool.                                        */
    331   /*                                                                       */
    332 #define FT_RENDER_POOL_SIZE  16384L
    333 
    334 
    335   /*************************************************************************/
    336   /*                                                                       */
    337   /* FT_MAX_MODULES                                                        */
    338   /*                                                                       */
    339   /*   The maximum number of modules that can be registered in a single    */
    340   /*   FreeType library object.  32 is the default.                        */
    341   /*                                                                       */
    342 #define FT_MAX_MODULES  32
    343 
    344 
    345   /*************************************************************************/
    346   /*                                                                       */
    347   /* Debug level                                                           */
    348   /*                                                                       */
    349   /*   FreeType can be compiled in debug or trace mode.  In debug mode,    */
    350   /*   errors are reported through the `ftdebug' component.  In trace      */
    351   /*   mode, additional messages are sent to the standard output during    */
    352   /*   execution.                                                          */
    353   /*                                                                       */
    354   /*   Define FT_DEBUG_LEVEL_ERROR to build the library in debug mode.     */
    355   /*   Define FT_DEBUG_LEVEL_TRACE to build it in trace mode.              */
    356   /*                                                                       */
    357   /*   Don't define any of these macros to compile in `release' mode!      */
    358   /*                                                                       */
    359   /*   Do not #undef these macros here since the build system might define */
    360   /*   them for certain configurations only.                               */
    361   /*                                                                       */
    362 /* #define FT_DEBUG_LEVEL_ERROR */
    363 /* #define FT_DEBUG_LEVEL_TRACE */
    364 
    365 
    366   /*************************************************************************/
    367   /*                                                                       */
    368   /* Memory Debugging                                                      */
    369   /*                                                                       */
    370   /*   FreeType now comes with an integrated memory debugger that is       */
    371   /*   capable of detecting simple errors like memory leaks or double      */
    372   /*   deletes.  To compile it within your build of the library, you       */
    373   /*   should define FT_DEBUG_MEMORY here.                                 */
    374   /*                                                                       */
    375   /*   Note that the memory debugger is only activated at runtime when     */
    376   /*   when the _environment_ variable `FT2_DEBUG_MEMORY' is defined also! */
    377   /*                                                                       */
    378   /*   Do not #undef this macro here since the build system might define   */
    379   /*   it for certain configurations only.                                 */
    380   /*                                                                       */
    381 /* #define FT_DEBUG_MEMORY */
    382 
    383 
    384   /*************************************************************************/
    385   /*                                                                       */
    386   /* Module errors                                                         */
    387   /*                                                                       */
    388   /*   If this macro is set (which is _not_ the default), the higher byte  */
    389   /*   of an error code gives the module in which the error has occurred,  */
    390   /*   while the lower byte is the real error code.                        */
    391   /*                                                                       */
    392   /*   Setting this macro makes sense for debugging purposes only, since   */
    393   /*   it would break source compatibility of certain programs that use    */
    394   /*   FreeType 2.                                                         */
    395   /*                                                                       */
    396   /*   More details can be found in the files ftmoderr.h and fterrors.h.   */
    397   /*                                                                       */
    398 #undef FT_CONFIG_OPTION_USE_MODULE_ERRORS
    399 
    400 
    401   /*************************************************************************/
    402   /*                                                                       */
    403   /* Position Independent Code                                             */
    404   /*                                                                       */
    405   /*   If this macro is set (which is _not_ the default), FreeType2 will   */
    406   /*   avoid creating constants that require address fixups.  Instead the  */
    407   /*   constants will be moved into a struct and additional intialization  */
    408   /*   code will be used.                                                  */
    409   /*                                                                       */
    410   /*   Setting this macro is needed for systems that prohibit address      */
    411   /*   fixups, such as BREW.                                               */
    412   /*                                                                       */
    413 /* #define FT_CONFIG_OPTION_PIC */
    414 
    415 
    416   /*************************************************************************/
    417   /*************************************************************************/
    418   /****                                                                 ****/
    419   /****        S F N T   D R I V E R    C O N F I G U R A T I O N       ****/
    420   /****                                                                 ****/
    421   /*************************************************************************/
    422   /*************************************************************************/
    423 
    424 
    425   /*************************************************************************/
    426   /*                                                                       */
    427   /* Define TT_CONFIG_OPTION_EMBEDDED_BITMAPS if you want to support       */
    428   /* embedded bitmaps in all formats using the SFNT module (namely         */
    429   /* TrueType & OpenType).                                                 */
    430   /*                                                                       */
    431 #define TT_CONFIG_OPTION_EMBEDDED_BITMAPS
    432 
    433 
    434   /*************************************************************************/
    435   /*                                                                       */
    436   /* Define TT_CONFIG_OPTION_POSTSCRIPT_NAMES if you want to be able to    */
    437   /* load and enumerate the glyph Postscript names in a TrueType or        */
    438   /* OpenType file.                                                        */
    439   /*                                                                       */
    440   /* Note that when you do not compile the `PSNames' module by undefining  */
    441   /* the above FT_CONFIG_OPTION_POSTSCRIPT_NAMES, the `sfnt' module will   */
    442   /* contain additional code used to read the PS Names table from a font.  */
    443   /*                                                                       */
    444   /* (By default, the module uses `PSNames' to extract glyph names.)       */
    445   /*                                                                       */
    446 #define TT_CONFIG_OPTION_POSTSCRIPT_NAMES
    447 
    448 
    449   /*************************************************************************/
    450   /*                                                                       */
    451   /* Define TT_CONFIG_OPTION_SFNT_NAMES if your applications need to       */
    452   /* access the internal name table in a SFNT-based format like TrueType   */
    453   /* or OpenType.  The name table contains various strings used to         */
    454   /* describe the font, like family name, copyright, version, etc.  It     */
    455   /* does not contain any glyph name though.                               */
    456   /*                                                                       */
    457   /* Accessing SFNT names is done through the functions declared in        */
    458   /* `freetype/ftsnames.h'.                                                */
    459   /*                                                                       */
    460 #define TT_CONFIG_OPTION_SFNT_NAMES
    461 
    462 
    463   /*************************************************************************/
    464   /*                                                                       */
    465   /* TrueType CMap support                                                 */
    466   /*                                                                       */
    467   /*   Here you can fine-tune which TrueType CMap table format shall be    */
    468   /*   supported.                                                          */
    469 #define TT_CONFIG_CMAP_FORMAT_0
    470 #define TT_CONFIG_CMAP_FORMAT_2
    471 #define TT_CONFIG_CMAP_FORMAT_4
    472 #define TT_CONFIG_CMAP_FORMAT_6
    473 #define TT_CONFIG_CMAP_FORMAT_8
    474 #define TT_CONFIG_CMAP_FORMAT_10
    475 #define TT_CONFIG_CMAP_FORMAT_12
    476 #define TT_CONFIG_CMAP_FORMAT_13
    477 #define TT_CONFIG_CMAP_FORMAT_14
    478 
    479 
    480   /*************************************************************************/
    481   /*************************************************************************/
    482   /****                                                                 ****/
    483   /****    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   ****/
    484   /****                                                                 ****/
    485   /*************************************************************************/
    486   /*************************************************************************/
    487 
    488   /*************************************************************************/
    489   /*                                                                       */
    490   /* Define TT_CONFIG_OPTION_BYTECODE_INTERPRETER if you want to compile   */
    491   /* a bytecode interpreter in the TrueType driver.                        */
    492   /*                                                                       */
    493   /* By undefining this, you will only compile the code necessary to load  */
    494   /* TrueType glyphs without hinting.                                      */
    495   /*                                                                       */
    496   /*   Do not #undef this macro here, since the build system might         */
    497   /*   define it for certain configurations only.                          */
    498   /*                                                                       */
    499 /* #define TT_CONFIG_OPTION_BYTECODE_INTERPRETER */
    500 
    501 
    502   /*************************************************************************/
    503   /*                                                                       */
    504   /* If you define TT_CONFIG_OPTION_UNPATENTED_HINTING, a special version  */
    505   /* of the TrueType bytecode interpreter is used that doesn't implement   */
    506   /* any of the patented opcodes and algorithms.  The patents related to   */
    507   /* TrueType hinting have expired worldwide since May 2010; this option   */
    508   /* is now deprecated.                                                    */
    509   /*                                                                       */
    510   /* Note that the TT_CONFIG_OPTION_UNPATENTED_HINTING macro is *ignored*  */
    511   /* if you define TT_CONFIG_OPTION_BYTECODE_INTERPRETER; in other words,  */
    512   /* either define TT_CONFIG_OPTION_BYTECODE_INTERPRETER or                */
    513   /* TT_CONFIG_OPTION_UNPATENTED_HINTING but not both at the same time.    */
    514   /*                                                                       */
    515   /* This macro is only useful for a small number of font files (mostly    */
    516   /* for Asian scripts) that require bytecode interpretation to properly   */
    517   /* load glyphs.  For all other fonts, this produces unpleasant results,  */
    518   /* thus the unpatented interpreter is never used to load glyphs from     */
    519   /* TrueType fonts unless one of the following two options is used.       */
    520   /*                                                                       */
    521   /*   - The unpatented interpreter is explicitly activated by the user    */
    522   /*     through the FT_PARAM_TAG_UNPATENTED_HINTING parameter tag         */
    523   /*     when opening the FT_Face.                                         */
    524   /*                                                                       */
    525   /*   - FreeType detects that the FT_Face corresponds to one of the       */
    526   /*     `trick' fonts (e.g., `Mingliu') it knows about.  The font engine  */
    527   /*     contains a hard-coded list of font names and other matching       */
    528   /*     parameters (see function `tt_face_init' in file                   */
    529   /*     `src/truetype/ttobjs.c').                                         */
    530   /*                                                                       */
    531   /* Here a sample code snippet for using FT_PARAM_TAG_UNPATENTED_HINTING. */
    532   /*                                                                       */
    533   /*   {                                                                   */
    534   /*     FT_Parameter  parameter;                                          */
    535   /*     FT_Open_Args  open_args;                                          */
    536   /*                                                                       */
    537   /*                                                                       */
    538   /*     parameter.tag = FT_PARAM_TAG_UNPATENTED_HINTING;                  */
    539   /*                                                                       */
    540   /*     open_args.flags      = FT_OPEN_PATHNAME | FT_OPEN_PARAMS;         */
    541   /*     open_args.pathname   = my_font_pathname;                          */
    542   /*     open_args.num_params = 1;                                         */
    543   /*     open_args.params     = &parameter;                                */
    544   /*                                                                       */
    545   /*     error = FT_Open_Face( library, &open_args, index, &face );        */
    546   /*     ...                                                               */
    547   /*   }                                                                   */
    548   /*                                                                       */
    549 #define TT_CONFIG_OPTION_UNPATENTED_HINTING
    550 
    551 
    552   /*************************************************************************/
    553   /*                                                                       */
    554   /* Define TT_CONFIG_OPTION_INTERPRETER_SWITCH to compile the TrueType    */
    555   /* bytecode interpreter with a huge switch statement, rather than a call */
    556   /* table.  This results in smaller and faster code for a number of       */
    557   /* architectures.                                                        */
    558   /*                                                                       */
    559   /* Note however that on some compiler/processor combinations, undefining */
    560   /* this macro will generate faster, though larger, code.                 */
    561   /*                                                                       */
    562 #define TT_CONFIG_OPTION_INTERPRETER_SWITCH
    563 
    564 
    565   /*************************************************************************/
    566   /*                                                                       */
    567   /* Define TT_CONFIG_OPTION_COMPONENT_OFFSET_SCALED to compile the        */
    568   /* TrueType glyph loader to use Apple's definition of how to handle      */
    569   /* component offsets in composite glyphs.                                */
    570   /*                                                                       */
    571   /* Apple and MS disagree on the default behavior of component offsets    */
    572   /* in composites.  Apple says that they should be scaled by the scaling  */
    573   /* factors in the transformation matrix (roughly, it's more complex)     */
    574   /* while MS says they should not.  OpenType defines two bits in the      */
    575   /* composite flags array which can be used to disambiguate, but old      */
    576   /* fonts will not have them.                                             */
    577   /*                                                                       */
    578   /*   http://partners.adobe.com/asn/developer/opentype/glyf.html          */
    579   /*   http://fonts.apple.com/TTRefMan/RM06/Chap6glyf.html                 */
    580   /*                                                                       */
    581 #undef TT_CONFIG_OPTION_COMPONENT_OFFSET_SCALED
    582 
    583 
    584   /*************************************************************************/
    585   /*                                                                       */
    586   /* Define TT_CONFIG_OPTION_GX_VAR_SUPPORT if you want to include         */
    587   /* support for Apple's distortable font technology (fvar, gvar, cvar,    */
    588   /* and avar tables).  This has many similarities to Type 1 Multiple      */
    589   /* Masters support.                                                      */
    590   /*                                                                       */
    591 #define TT_CONFIG_OPTION_GX_VAR_SUPPORT
    592 
    593 
    594   /*************************************************************************/
    595   /*                                                                       */
    596   /* Define TT_CONFIG_OPTION_BDF if you want to include support for        */
    597   /* an embedded `BDF ' table within SFNT-based bitmap formats.            */
    598   /*                                                                       */
    599 #define TT_CONFIG_OPTION_BDF
    600 
    601 
    602   /*************************************************************************/
    603   /*************************************************************************/
    604   /****                                                                 ****/
    605   /****      T Y P E 1   D R I V E R    C O N F I G U R A T I O N       ****/
    606   /****                                                                 ****/
    607   /*************************************************************************/
    608   /*************************************************************************/
    609 
    610 
    611   /*************************************************************************/
    612   /*                                                                       */
    613   /* T1_MAX_DICT_DEPTH is the maximal depth of nest dictionaries and       */
    614   /* arrays in the Type 1 stream (see t1load.c).  A minimum of 4 is        */
    615   /* required.                                                             */
    616   /*                                                                       */
    617 #define T1_MAX_DICT_DEPTH  5
    618 
    619 
    620   /*************************************************************************/
    621   /*                                                                       */
    622   /* T1_MAX_SUBRS_CALLS details the maximum number of nested sub-routine   */
    623   /* calls during glyph loading.                                           */
    624   /*                                                                       */
    625 #define T1_MAX_SUBRS_CALLS  16
    626 
    627 
    628   /*************************************************************************/
    629   /*                                                                       */
    630   /* T1_MAX_CHARSTRING_OPERANDS is the charstring stack's capacity.  A     */
    631   /* minimum of 16 is required.                                            */
    632   /*                                                                       */
    633   /* The Chinese font MingTiEG-Medium (CNS 11643 character set) needs 256. */
    634   /*                                                                       */
    635 #define T1_MAX_CHARSTRINGS_OPERANDS  256
    636 
    637 
    638   /*************************************************************************/
    639   /*                                                                       */
    640   /* Define this configuration macro if you want to prevent the            */
    641   /* compilation of `t1afm', which is in charge of reading Type 1 AFM      */
    642   /* files into an existing face.  Note that if set, the T1 driver will be */
    643   /* unable to produce kerning distances.                                  */
    644   /*                                                                       */
    645 #undef T1_CONFIG_OPTION_NO_AFM
    646 
    647 
    648   /*************************************************************************/
    649   /*                                                                       */
    650   /* Define this configuration macro if you want to prevent the            */
    651   /* compilation of the Multiple Masters font support in the Type 1        */
    652   /* driver.                                                               */
    653   /*                                                                       */
    654 #undef T1_CONFIG_OPTION_NO_MM_SUPPORT
    655 
    656 
    657   /*************************************************************************/
    658   /*************************************************************************/
    659   /****                                                                 ****/
    660   /****    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     ****/
    661   /****                                                                 ****/
    662   /*************************************************************************/
    663   /*************************************************************************/
    664 
    665 
    666   /*************************************************************************/
    667   /*                                                                       */
    668   /* Compile autofit module with CJK (Chinese, Japanese, Korean) script    */
    669   /* support.                                                              */
    670   /*                                                                       */
    671 #define AF_CONFIG_OPTION_CJK
    672 
    673   /*************************************************************************/
    674   /*                                                                       */
    675   /* Compile autofit module with Indic script support.                     */
    676   /*                                                                       */
    677 #define AF_CONFIG_OPTION_INDIC
    678 
    679   /* */
    680 
    681 
    682   /*
    683    * Define this variable if you want to keep the layout of internal
    684    * structures that was used prior to FreeType 2.2.  This also compiles in
    685    * a few obsolete functions to avoid linking problems on typical Unix
    686    * distributions.
    687    *
    688    * For embedded systems or building a new distribution from scratch, it
    689    * is recommended to disable the macro since it reduces the library's code
    690    * size and activates a few memory-saving optimizations as well.
    691    */
    692 #define FT_CONFIG_OPTION_OLD_INTERNALS
    693 
    694 
    695   /*
    696    *  To detect legacy cache-lookup call from a rogue client (<= 2.1.7),
    697    *  we restrict the number of charmaps in a font.  The current API of
    698    *  FTC_CMapCache_Lookup() takes cmap_index & charcode, but old API
    699    *  takes charcode only.  To determine the passed value is for cmap_index
    700    *  or charcode, the possible cmap_index is restricted not to exceed
    701    *  the minimum possible charcode by a rogue client.  It is also very
    702    *  unlikely that a rogue client is interested in Unicode values 0 to 15.
    703    *
    704    *  NOTE: The original threshold was 4 deduced from popular number of
    705    *        cmap subtables in UCS-4 TrueType fonts, but now it is not
    706    *        irregular for OpenType fonts to have more than 4 subtables,
    707    *        because variation selector subtables are available for Apple
    708    *        and Microsoft platforms.
    709    */
    710 
    711 #ifdef FT_CONFIG_OPTION_OLD_INTERNALS
    712 #define FT_MAX_CHARMAP_CACHEABLE 15
    713 #endif
    714 
    715 
    716   /*
    717    * This macro is defined if either unpatented or native TrueType
    718    * hinting is requested by the definitions above.
    719    */
    720 #ifdef TT_CONFIG_OPTION_BYTECODE_INTERPRETER
    721 #define  TT_USE_BYTECODE_INTERPRETER
    722 #undef   TT_CONFIG_OPTION_UNPATENTED_HINTING
    723 #elif defined TT_CONFIG_OPTION_UNPATENTED_HINTING
    724 #define  TT_USE_BYTECODE_INTERPRETER
    725 #endif
    726 
    727 FT_END_HEADER
    728 
    729 
    730 #endif /* __FTOPTION_H__ */
    731 
    732 
    733 /* END */
    734