ftoption.h   ftoption.h 
/************************************************************************** */ /************************************************************************** */
/* */ /* */
/* ftoption.h */ /* ftoption.h */
/* */ /* */
/* User-selectable configuration macros (specification only). */ /* User-selectable configuration macros (specification only). */
/* */ /* */
/* Copyright 1996-2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009, /* Copyright 1996-2011 by
*/ */
/* 2010 by
*/
/* David Turner, Robert Wilhelm, and Werner Lemberg. */ /* David Turner, Robert Wilhelm, and Werner Lemberg. */
/* */ /* */
/* This file is part of the FreeType project, and may only be used, */ /* This file is part of the FreeType project, and may only be used, */
/* modified, and distributed under the terms of the FreeType project */ /* modified, and distributed under the terms of the FreeType project */
/* license, LICENSE.TXT. By continuing to use, modify, or distribute */ /* license, LICENSE.TXT. By continuing to use, modify, or distribute */
/* this file you indicate that you have read the license and */ /* this file you indicate that you have read the license and */
/* understand and accept it fully. */ /* understand and accept it fully. */
/* */ /* */
/************************************************************************** */ /************************************************************************** */
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/* function names. This allows you to link any program with FreeType */ /* function names. This allows you to link any program with FreeType */
/* _and_ ZLib without linking conflicts. */ /* _and_ ZLib without linking conflicts. */
/* */ /* */
/* Do not #undef this macro here since the build system might define */ /* Do not #undef this macro here since the build system might define */
/* it for certain configurations only. */ /* it for certain configurations only. */
/* */ /* */
/* #define FT_CONFIG_OPTION_SYSTEM_ZLIB */ /* #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'.
*/
/*
*/
/* #define FT_CONFIG_OPTION_USE_BZIP2 */
/************************************************************************
*/
/*
*/
/* DLL export compilation */ /* DLL export compilation */
/* */ /* */
/* When compiling FreeType as a DLL, some systems/compilers need a */ /* When compiling FreeType as a DLL, some systems/compilers need a */
/* special keyword in front OR after the return type of function */ /* special keyword in front OR after the return type of function */
/* declarations. */ /* declarations. */
/* */ /* */
/* Two macros are used within the FreeType source code to define */ /* Two macros are used within the FreeType source code to define */
/* exported library functions: FT_EXPORT and FT_EXPORT_DEF. */ /* exported library functions: FT_EXPORT and FT_EXPORT_DEF. */
/* */ /* */
/* FT_EXPORT( return_type ) */ /* FT_EXPORT( return_type ) */
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/* Don't define any of these macros to compile in `release' 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 */ /* Do not #undef these macros here since the build system might define */
/* them for certain configurations only. */ /* them for certain configurations only. */
/* */ /* */
/* #define FT_DEBUG_LEVEL_ERROR */ /* #define FT_DEBUG_LEVEL_ERROR */
/* #define FT_DEBUG_LEVEL_TRACE */ /* #define FT_DEBUG_LEVEL_TRACE */
/************************************************************************ */ /************************************************************************ */
/* */ /* */
/* 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
*/
/*
*/
/* 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 */ /* Memory Debugging */
/* */ /* */
/* FreeType now comes with an integrated memory debugger that is */ /* FreeType now comes with an integrated memory debugger that is */
/* capable of detecting simple errors like memory leaks or double */ /* capable of detecting simple errors like memory leaks or double */
/* deletes. To compile it within your build of the library, you */ /* deletes. To compile it within your build of the library, you */
/* should define FT_DEBUG_MEMORY here. */ /* should define FT_DEBUG_MEMORY here. */
/* */ /* */
/* Note that the memory debugger is only activated at runtime when */ /* Note that the memory debugger is only activated at runtime when */
/* when the _environment_ variable `FT2_DEBUG_MEMORY' is defined also! */ /* when the _environment_ variable `FT2_DEBUG_MEMORY' is defined also! */
/* */ /* */
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/************************************************************************ */ /************************************************************************ */
/**** *** */ /**** *** */
/**** 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 *** */ /**** 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 */ /* Define TT_CONFIG_OPTION_BYTECODE_INTERPRETER if you want to compile */
/* a bytecode interpreter in the TrueType driver. Note that there are /* a bytecode interpreter in the TrueType driver.
*/ */
/* important patent issues related to the use of the interpreter.
*/
/* */ /* */
/* By undefining this, you will only compile the code necessary to load */ /* By undefining this, you will only compile the code necessary to load */
/* TrueType glyphs without hinting. */ /* TrueType glyphs without hinting. */
/* */ /* */
/* Do not #undef this macro here, since the build system might */ /* Do not #undef this macro here, since the build system might */
/* define it for certain configurations only. */ /* define it for certain configurations only. */
/* */ /* */
/* #define TT_CONFIG_OPTION_BYTECODE_INTERPRETER */ #define TT_CONFIG_OPTION_BYTECODE_INTERPRETER
/************************************************************************ */ /************************************************************************ */
/* */ /* */
/* If you define TT_CONFIG_OPTION_UNPATENTED_HINTING, a special version */ /* If you define TT_CONFIG_OPTION_UNPATENTED_HINTING, a special version */
/* of the TrueType bytecode interpreter is used that doesn't implement */ /* of the TrueType bytecode interpreter is used that doesn't implement */
/* any of the patented opcodes and algorithms. Note that the /* any of the patented opcodes and algorithms. The patents related to
*/ */
/* TT_CONFIG_OPTION_UNPATENTED_HINTING macro is *ignored* if you define /* TrueType hinting have expired worldwide since May 2010; this option
*/ */
/* TT_CONFIG_OPTION_BYTECODE_INTERPRETER; in other words, either define /* is now deprecated.
*/ */
/* TT_CONFIG_OPTION_BYTECODE_INTERPRETER or /*
*/ */
/* Note that the TT_CONFIG_OPTION_UNPATENTED_HINTING macro is *ignored*
*/
/* if you define TT_CONFIG_OPTION_BYTECODE_INTERPRETER; in other words,
*/
/* either define TT_CONFIG_OPTION_BYTECODE_INTERPRETER or
*/
/* TT_CONFIG_OPTION_UNPATENTED_HINTING but not both at the same time. */ /* TT_CONFIG_OPTION_UNPATENTED_HINTING but not both at the same time. */
/* */ /* */
/* This macro is only useful for a small number of font files (mostly */ /* This macro is only useful for a small number of font files (mostly */
/* for Asian scripts) that require bytecode interpretation to properly */ /* for Asian scripts) that require bytecode interpretation to properly */
/* load glyphs. For all other fonts, this produces unpleasant results, */ /* load glyphs. For all other fonts, this produces unpleasant results, */
/* thus the unpatented interpreter is never used to load glyphs from */ /* thus the unpatented interpreter is never used to load glyphs from */
/* TrueType fonts unless one of the following two options is used. */ /* TrueType fonts unless one of the following two options is used. */
/* */ /* */
/* - The unpatented interpreter is explicitly activated by the user */ /* - The unpatented interpreter is explicitly activated by the user */
/* through the FT_PARAM_TAG_UNPATENTED_HINTING parameter tag */ /* through the FT_PARAM_TAG_UNPATENTED_HINTING parameter tag */
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/* */ /* */
/* open_args.flags = FT_OPEN_PATHNAME | FT_OPEN_PARAMS; */ /* open_args.flags = FT_OPEN_PATHNAME | FT_OPEN_PARAMS; */
/* open_args.pathname = my_font_pathname; */ /* open_args.pathname = my_font_pathname; */
/* open_args.num_params = 1; */ /* open_args.num_params = 1; */
/* open_args.params = &parameter; */ /* open_args.params = &parameter; */
/* */ /* */
/* error = FT_Open_Face( library, &open_args, index, &face ); */ /* error = FT_Open_Face( library, &open_args, index, &face ); */
/* ... */ /* ... */
/* } */ /* } */
/* */ /* */
#define TT_CONFIG_OPTION_UNPATENTED_HINTING /* #define TT_CONFIG_OPTION_UNPATENTED_HINTING */
/************************************************************************ */ /************************************************************************ */
/* */ /* */
/* Define TT_CONFIG_OPTION_INTERPRETER_SWITCH to compile the TrueType */ /* Define TT_CONFIG_OPTION_INTERPRETER_SWITCH to compile the TrueType */
/* bytecode interpreter with a huge switch statement, rather than a call */ /* bytecode interpreter with a huge switch statement, rather than a call */
/* table. This results in smaller and faster code for a number of */ /* table. This results in smaller and faster code for a number of */
/* architectures. */ /* architectures. */
/* */ /* */
/* Note however that on some compiler/processor combinations, undefining */ /* Note however that on some compiler/processor combinations, undefining */
/* this macro will generate faster, though larger, code. */ /* this macro will generate faster, though larger, code. */
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/* TrueType glyph loader to use Apple's definition of how to handle */ /* TrueType glyph loader to use Apple's definition of how to handle */
/* component offsets in composite glyphs. */ /* component offsets in composite glyphs. */
/* */ /* */
/* Apple and MS disagree on the default behavior of component offsets */ /* Apple and MS disagree on the default behavior of component offsets */
/* in composites. Apple says that they should be scaled by the scaling */ /* in composites. Apple says that they should be scaled by the scaling */
/* factors in the transformation matrix (roughly, it's more complex) */ /* factors in the transformation matrix (roughly, it's more complex) */
/* while MS says they should not. OpenType defines two bits in the */ /* while MS says they should not. OpenType defines two bits in the */
/* composite flags array which can be used to disambiguate, but old */ /* composite flags array which can be used to disambiguate, but old */
/* fonts will not have them. */ /* fonts will not have them. */
/* */ /* */
/* http://partners.adobe.com/asn/developer/opentype/glyf.html */ /* http://www.microsoft.com/typography/otspec/glyf.htm */
/* http://fonts.apple.com/TTRefMan/RM06/Chap6glyf.html */ /* http://fonts.apple.com/TTRefMan/RM06/Chap6glyf.html */
/* */ /* */
#undef TT_CONFIG_OPTION_COMPONENT_OFFSET_SCALED #undef TT_CONFIG_OPTION_COMPONENT_OFFSET_SCALED
/************************************************************************ */ /************************************************************************ */
/* */ /* */
/* Define TT_CONFIG_OPTION_GX_VAR_SUPPORT if you want to include */ /* Define TT_CONFIG_OPTION_GX_VAR_SUPPORT if you want to include */
/* support for Apple's distortable font technology (fvar, gvar, cvar, */ /* support for Apple's distortable font technology (fvar, gvar, cvar, */
/* and avar tables). This has many similarities to Type 1 Multiple */ /* and avar tables). This has many similarities to Type 1 Multiple */
/* Masters support. */ /* Masters support. */
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/* support. */ /* support. */
/* */ /* */
#define AF_CONFIG_OPTION_CJK #define AF_CONFIG_OPTION_CJK
/************************************************************************ */ /************************************************************************ */
/* */ /* */
/* Compile autofit module with Indic script support. */ /* Compile autofit module with Indic script support. */
/* */ /* */
#define AF_CONFIG_OPTION_INDIC #define AF_CONFIG_OPTION_INDIC
/************************************************************************
*/
/*
*/
/* 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.
*/
/*
*/
/* This experimental option is only active if the render mode is
*/
/* FT_RENDER_MODE_LIGHT.
*/
/*
*/
/* #define AF_CONFIG_OPTION_USE_WARPER */
/* */ /* */
/* /*
* Define this variable if you want to keep the layout of internal * 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 * structures that was used prior to FreeType 2.2. This also compiles in
* a few obsolete functions to avoid linking problems on typical Unix * a few obsolete functions to avoid linking problems on typical Unix
* distributions. * distributions.
* *
* For embedded systems or building a new distribution from scratch, it * For embedded systems or building a new distribution from scratch, it
* is recommended to disable the macro since it reduces the library's cod e * is recommended to disable the macro since it reduces the library's cod e
* size and activates a few memory-saving optimizations as well. * size and activates a few memory-saving optimizations as well.
*/ */
#define FT_CONFIG_OPTION_OLD_INTERNALS #define FT_CONFIG_OPTION_OLD_INTERNALS
/* /*
* To detect legacy cache-lookup call from a rogue client (<= 2.1.7),
* we restrict the number of charmaps in a font. The current API of
* FTC_CMapCache_Lookup() takes cmap_index & charcode, but old API
* takes charcode only. To determine the passed value is for cmap_index
* or charcode, the possible cmap_index is restricted not to exceed
* the minimum possible charcode by a rogue client. It is also very
* unlikely that a rogue client is interested in Unicode values 0 to 15.
*
* NOTE: The original threshold was 4 deduced from popular number of
* cmap subtables in UCS-4 TrueType fonts, but now it is not
* irregular for OpenType fonts to have more than 4 subtables,
* because variation selector subtables are available for Apple
* and Microsoft platforms.
*/
#ifdef FT_CONFIG_OPTION_OLD_INTERNALS
#define FT_MAX_CHARMAP_CACHEABLE 15
#endif
/*
* This macro is defined if either unpatented or native TrueType * This macro is defined if either unpatented or native TrueType
* hinting is requested by the definitions above. * hinting is requested by the definitions above.
*/ */
#ifdef TT_CONFIG_OPTION_BYTECODE_INTERPRETER #ifdef TT_CONFIG_OPTION_BYTECODE_INTERPRETER
#define TT_USE_BYTECODE_INTERPRETER #define TT_USE_BYTECODE_INTERPRETER
#undef TT_CONFIG_OPTION_UNPATENTED_HINTING #undef TT_CONFIG_OPTION_UNPATENTED_HINTING
#elif defined TT_CONFIG_OPTION_UNPATENTED_HINTING #elif defined TT_CONFIG_OPTION_UNPATENTED_HINTING
#define TT_USE_BYTECODE_INTERPRETER #define TT_USE_BYTECODE_INTERPRETER
#endif #endif
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