kc3-lang/freetype/devel/ftoption.h
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Hash : 4ea0a7f0
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Date : 2007-01-05T09:03:31
formatting, minor doc fixes, copyright years
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devel/ftoption.h
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/***************************************************************************/ /* */ /* ftoption.h (for development) */ /* */ /* User-selectable configuration macros (specification only). */ /* */ /* Copyright 1996-2001, 2002, 2003, 2004, 2005, 2006, 2007 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 and Jamfiles 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 ****/ /**** ****/ /*************************************************************************/ /*************************************************************************/ /*************************************************************************/ /* */ /* Uncomment the line below if you want to activate sub-pixel rendering */ /* (a.k.a. LCD rendering, or ClearType) in this build of the library. */ /* */ /* Note that this feature is covered by several Microsoft patents */ /* and should not be activated in any default build of the library. */ /* */ /* This macro has no impact on the FreeType API, only on its */ /* _implementation_. For example, using FT_RENDER_MODE_LCD when calling */ /* FT_Render_Glyph still generates a bitmap that is 3 times larger than */ /* the original size; the difference will be that each triplet of */ /* subpixels has R=G=B. */ /* */ /* This is done to allow FreeType clients to run unmodified, forcing */ /* them to display normal gray-level anti-aliased glyphs. */ /* */ #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 /*************************************************************************/ /* */ /* 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. */ /* */ /* #define FT_CONFIG_OPTION_SYSTEM_ZLIB */ /*************************************************************************/ /* */ /* DLL export compilation */ /* */ /* When compiling FreeType as a DLL, some systems/compilers need a */ /* special keyword in front OR after the return type of function */ /* declarations. */ /* */ /* Two macros are used within the FreeType source code to define */ /* exported library functions: FT_EXPORT and FT_EXPORT_DEF. */ /* */ /* FT_EXPORT( return_type ) */ /* */ /* is used in a function declaration, as in */ /* */ /* FT_EXPORT( FT_Error ) */ /* FT_Init_FreeType( FT_Library* alibrary ); */ /* */ /* */ /* FT_EXPORT_DEF( return_type ) */ /* */ /* is used in a function definition, as in */ /* */ /* FT_EXPORT_DEF( FT_Error ) */ /* FT_Init_FreeType( FT_Library* alibrary ) */ /* { */ /* ... some code ... */ /* return FT_Err_Ok; */ /* } */ /* */ /* You can provide your own implementation of FT_EXPORT and */ /* FT_EXPORT_DEF here if you want. If you leave them undefined, they */ /* will be later automatically defined as `extern return_type' to */ /* allow normal compilation. */ /* */ /* Do not #undef these macros here since the build system might define */ /* them for certain configurations only. */ /* */ /* #define FT_EXPORT(x) extern x */ /* #define FT_EXPORT_DEF(x) x */ /*************************************************************************/ /* */ /* 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. */ /* */ /* - The Type 1 driver will not be able to synthetize 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 */ /* synthetize 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 synthetize 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 allows FreeType to be used with the PostScript language, using */ /* the GhostScript interpreter. */ /* */ /* #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. */ /* */ /* This must be greater than 4KByte. */ /* */ #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 /*************************************************************************/ /* */ /* 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 /*************************************************************************/ /*************************************************************************/ /**** ****/ /**** 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_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 */ /* `freetype/ftnames.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 /*************************************************************************/ /*************************************************************************/ /**** ****/ /**** 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. Note that there are */ /* important patent issues related to the use of the interpreter. */ /* */ /* 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_UNPATENTED_HINTING (in addition to */ /* TT_CONFIG_OPTION_BYTECODE_INTERPRETER) to compile the unpatented */ /* work-around hinting system. Note that for the moment, the algorithm */ /* is only used when selected at runtime through the parameter tag */ /* FT_PARAM_TAG_UNPATENTED_HINTING; or when the debug hook */ /* FT_DEBUG_HOOK_UNPATENTED_HINTING is globally activated. */ /* */ /* #define TT_CONFIG_OPTION_UNPATENTED_HINTING */ /*************************************************************************/ /* */ /* Define TT_CONFIG_OPTION_INTERPRETER_SWITCH to compile the TrueType */ /* bytecode interpreter with a huge switch statement, rather than a call */ /* table. This results in smaller and faster code for a number of */ /* architectures. */ /* */ /* Note however that on some compiler/processor combinations, undefining */ /* this macro will generate faster, though larger, code. */ /* */ #define TT_CONFIG_OPTION_INTERPRETER_SWITCH /*************************************************************************/ /* */ /* 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. */ /* */ /* http://partners.adobe.com/asn/developer/opentype/glyf.html */ /* http://fonts.apple.com/TTRefMan/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). 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 /*************************************************************************/ /*************************************************************************/ /**** ****/ /**** 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 maximal 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 (CNS 11643 character set) needs 256. */ /* */ #define T1_MAX_CHARSTRINGS_OPERANDS 256 /*************************************************************************/ /* */ /* Define this configuration macro if you want to prevent the */ /* compilation of `t1afm', which is in charge of reading Type 1 AFM */ /* files into an existing face. Note that if set, the T1 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 /*************************************************************************/ /*************************************************************************/ /**** ****/ /**** 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 script support. */ /* */ #define AF_CONFIG_OPTION_CJK /* */ /* * Define this variable if you want to keep the layout of internal * structures that was used prior to FreeType 2.2. This also compiles in * a few obsolete functions to avoid linking problems on typical Unix * distributions. * * For embedded systems or building a new distribution from scratch, it * is recommended to disable the macro since it reduces the library's code * size and activates a few memory-saving optimizations as well. */ #undef FT_CONFIG_OPTION_OLD_INTERNALS /* * This variable is defined if either unpatented or native TrueType * hinting is requested by the definitions above. */ #ifdef TT_CONFIG_OPTION_BYTECODE_INTERPRETER #define TT_USE_BYTECODE_INTERPRETER #elif defined TT_CONFIG_OPTION_UNPATENTED_HINTING #define TT_USE_BYTECODE_INTERPRETER #endif FT_END_HEADER #endif /* __FTOPTION_H__ */ /* END */