forked from minhngoc25a/freetype2
426 lines
26 KiB
C
426 lines
26 KiB
C
/***************************************************************************/
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/* */
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/* ftoption.h */
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/* */
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/* User-selectable configuration macros (specification only). */
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/* */
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/* Copyright 1996-2000 by */
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/* David Turner, Robert Wilhelm, and Werner Lemberg. */
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/* */
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/* This file is part of the FreeType project, and may only be used, */
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/* modified, and distributed under the terms of the FreeType project */
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/* license, LICENSE.TXT. By continuing to use, modify, or distribute */
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/* this file you indicate that you have read the license and */
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/* understand and accept it fully. */
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/* */
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/***************************************************************************/
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#ifndef __FTOPTION_H__
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#define __FTOPTION_H__
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#include <ft2build.h>
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FT_BEGIN_HEADER
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/*************************************************************************/
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/* */
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/* USER-SELECTABLE CONFIGURATION MACROS */
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/* */
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/* These macros can be toggled by developers to enable or disable */
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/* certain aspects of FreeType. This is a default file, where all major */
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/* options are enabled. */
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/* */
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/* Note that if some modifications are required for your build, we */
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/* advise you to put a modified copy of this file in your build */
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/* directory, rather than modifying it in-place. */
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/* */
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/* The build directory is normally `freetype/builds/<system>' and */
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/* contains build or system-specific files that are included in */
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/* priority when building the library. */
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/* */
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/*************************************************************************/
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/*************************************************************************/
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/*************************************************************************/
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/**** ****/
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/**** 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 ****/
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/**** ****/
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/*************************************************************************/
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/*************************************************************************/
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/*************************************************************************/
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/* */
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/* Convenience functions support */
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/* */
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/* Some functions of the FreeType 2 API are provided as a convenience */
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/* for client applications and developers. However, they are not */
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/* required to build and run the library itself. */
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/* */
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/* By defining this configuration macro, you'll disable the */
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/* compilation of these functions at build time. This can be useful */
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/* to reduce the library's code size when you don't need any of */
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/* these functions. */
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/* */
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/* All convenience functions are declared as such in their */
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/* documentation. */
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/* */
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#undef FT_CONFIG_OPTION_NO_CONVENIENCE_FUNCS
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/*************************************************************************/
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/* */
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/* Module errors */
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/* */
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/* If this macro is set (which is the default), the higher byte of an */
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/* error code gives the module in which the error has occurred, while */
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/* the lower byte is the real error code. */
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/* */
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/* Unsetting this macro makes sense for backwards compatibility; only */
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/* the real error code is emitted, and the higher byte is always zero. */
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/* */
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/* More details can be found in the files ftmoderr.h and fterrors.h. */
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/* */
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#define FT_CONFIG_OPTION_USE_MODULE_ERRORS
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/*************************************************************************/
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/* */
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/* Alternate Glyph Image Format support */
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/* */
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/* By default, the glyph images returned by the FreeType glyph loader */
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/* can either be a pixmap or a vectorial outline defined through */
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/* Bezier control points. When defining the following configuration */
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/* macro, some font drivers will be able to register alternate */
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/* glyph image formats. */
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/* */
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/* Unset this macro if you are sure that you will never use a font */
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/* driver with an alternate glyph format; this will reduce the size of */
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/* the base layer code. */
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/* */
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/* Note that a few Type 1 fonts, as well as Windows `vector' fonts */
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/* use a vector `plotter' format that isn't supported when this */
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/* macro is undefined. */
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/* */
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#define FT_CONFIG_OPTION_ALTERNATE_GLYPH_FORMATS
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/*************************************************************************/
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/* */
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/* Glyph Postscript Names handling */
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/* */
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/* By default, FreeType 2 is compiled with the `PSNames' module. This */
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/* This module is in charge of converting a glyph name string into a */
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/* Unicode value, or return a Macintosh standard glyph name for the */
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/* use with the TrueType `post' table. */
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/* */
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/* Undefine this macro if you do not want `PSNames' compiled in your */
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/* build of FreeType. This has the following effects: */
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/* */
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/* - The TrueType driver will provide its own set of glyph names, */
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/* if you build it to support postscript names in the TrueType */
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/* `post' table. */
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/* */
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/* - The Type 1 driver will not be able to synthetize a Unicode */
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/* charmap out of the glyphs found in the fonts. */
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/* */
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/* You would normally undefine this configuration macro when building */
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/* a version of FreeType that doesn't contain a Type 1 or CFF driver. */
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/* */
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#define FT_CONFIG_OPTION_POSTSCRIPT_NAMES
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/*************************************************************************/
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/* */
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/* Postscript Names to Unicode Values support */
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/* */
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/* By default, FreeType 2 is built with the `PSNames' module compiled */
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/* in. Among other things, the module is used to convert a glyph name */
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/* into a Unicode value. This is especially useful in order to */
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/* synthetize on the fly a Unicode charmap from the CFF/Type 1 driver */
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/* through a big table named the `Adobe Glyph List' (AGL). */
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/* */
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/* Undefine this macro if you do not want the Adobe Glyph List */
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/* compiled in your `PSNames' module. The Type 1 driver will not be */
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/* able to synthetize a Unicode charmap out of the glyphs found in the */
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/* fonts. */
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/* */
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#define FT_CONFIG_OPTION_ADOBE_GLYPH_LIST
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/*************************************************************************/
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/* */
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/* Many compilers provide a non-ANSI 64-bit data type that can be used */
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/* by FreeType to speed up some computations. However, this will create */
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/* some problems when compiling the library in strict ANSI mode. */
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/* */
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/* For this reason, the use of 64-bit ints is normally disabled when */
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/* the __STDC__ macro is defined. You can however disable this by */
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/* defining here the macro FT_CONFIG_OPTION_FORCE_INT64. */
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/* */
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/* For most compilers, this will only create compilation warnings */
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/* when building the library. */
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/* */
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/* ObNote: The compiler-specific 64-bit integers are detected in the */
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/* file "ftconfig.h" either statically, or through Autoconf */
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/* on platforms that support it. */
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/* */
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#define FT_CONFIG_OPTION_FORCE_INT64
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/*************************************************************************/
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/* */
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/* DLL export compilation */
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/* */
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/* When compiling FreeType as a DLL, some systems/compilers need a */
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/* special keyword in front OR after the return type of function */
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/* declarations. */
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/* */
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/* Two macros are used within the FreeType source code to define */
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/* exported library functions: FT_EXPORT and FT_EXPORT_DEF. */
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/* */
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/* FT_EXPORT( return_type ) */
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/* */
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/* is used in a function declaration, as in */
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/* */
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/* FT_EXPORT( FT_Error ) */
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/* FT_Init_FreeType( FT_Library* alibrary ); */
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/* */
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/* */
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/* FT_EXPORT_DEF( return_type ) */
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/* */
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/* is used in a function definition, as in */
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/* */
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/* FT_EXPORT_DEF( FT_Error ) */
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/* FT_Init_FreeType( FT_Library* alibrary ) */
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/* { */
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/* ... some code ... */
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/* return FT_Err_Ok; */
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/* } */
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/* */
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/* You can provide your own implementation of FT_EXPORT and */
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/* FT_EXPORT_DEF here if you want. If you leave them undefined, they */
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/* will be later automatically defined as `extern return_type' to */
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/* allow normal compilation. */
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/* */
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#undef FT_EXPORT
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#undef FT_EXPORT_DEF
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/*************************************************************************/
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/* */
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/* Debug level */
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/* */
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/* FreeType can be compiled in debug or trace mode. In debug mode, */
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/* errors are reported through the `ftdebug' component. In trace */
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/* mode, additional messages are sent to the standard output during */
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/* execution. */
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/* */
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/* Define FT_DEBUG_LEVEL_ERROR to build the library in debug mode. */
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/* Define FT_DEBUG_LEVEL_TRACE to build it in trace mode. */
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/* */
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/* Don't define any of these macros to compile in `release' mode! */
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/* */
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/* #define FT_DEBUG_LEVEL_ERROR */
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/* #define FT_DEBUG_LEVEL_TRACE */
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/*************************************************************************/
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/* */
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/* Computation Algorithms */
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/* */
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/* Used for debugging, this configuration macro should disappear */
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/* soon. */
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/* */
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#undef FT_CONFIG_OPTION_OLD_CALCS
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/*************************************************************************/
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/* */
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/* The size in bytes of the render pool used by the scan-line converter */
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/* to do all of its work. */
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/* */
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/* This must be greater than 4kByte. */
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/* */
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#define FT_RENDER_POOL_SIZE 32768L
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/*************************************************************************/
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/* */
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/* FT_MAX_MODULES */
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/* */
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/* The maximum number of modules that can be registered in a single */
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/* FreeType library object. 16 is the default. */
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/* */
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#define FT_MAX_MODULES 16
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/*************************************************************************/
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/* */
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/* FT_MAX_EXTENSIONS */
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/* */
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/* The maximum number of extensions that can be registered in a single */
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/* font driver. 8 is the default. */
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/* */
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/* If you don't know what this means, you certainly do not need to */
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/* change this value. */
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/* */
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#define FT_MAX_EXTENSIONS 8
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/*************************************************************************/
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/*************************************************************************/
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/**** ****/
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/**** S F N T D R I V E R C O N F I G U R A T I O N ****/
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/**** ****/
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/*************************************************************************/
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/*************************************************************************/
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/*************************************************************************/
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/* */
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/* Define TT_CONFIG_OPTION_EMBEDDED_BITMAPS if you want to support */
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/* embedded bitmaps in all formats using the SFNT module (namely */
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/* TrueType & OpenType). */
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/* */
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#define TT_CONFIG_OPTION_EMBEDDED_BITMAPS
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/*************************************************************************/
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/* */
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/* Define TT_CONFIG_OPTION_POSTSCRIPT_NAMES if you want to be able to */
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/* load and enumerate the glyph Postscript names in a TrueType or */
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/* OpenType file. */
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/* */
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/* Note that when you do not compile the `PSNames' module by undefining */
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/* the above FT_CONFIG_OPTION_POSTSCRIPT_NAMES, the `sfnt' module will */
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/* contain additional code used to read the PS Names table from a font. */
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/* */
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/* (By default, the module uses `PSNames' to extract glyph names.) */
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/* */
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#define TT_CONFIG_OPTION_POSTSCRIPT_NAMES
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/*************************************************************************/
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/* */
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/* Define TT_CONFIG_OPTION_SFNT_NAMES if your applications need to */
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/* access the internal name table in a SFNT-based format like TrueType */
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/* or OpenType. The name table contains various strings used to */
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/* describe the font, like family name, copyright, version, etc. It */
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/* does not contain any glyph name though. */
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/* */
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/* Accessing SFNT names is done through the functions declared in */
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/* `freetype/ftnames.h'. */
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/* */
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#define TT_CONFIG_OPTION_SFNT_NAMES
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/*************************************************************************/
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/*************************************************************************/
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/**** ****/
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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 ****/
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/**** ****/
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/*************************************************************************/
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/*************************************************************************/
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/*************************************************************************/
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/* */
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/* Define TT_CONFIG_OPTION_BYTECODE_INTERPRETER if you want to compile */
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/* a bytecode interpreter in the TrueType driver. Note that there are */
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/* important patent issues related to the use of the interpreter. */
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/* */
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/* By undefining this, you will only compile the code necessary to load */
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/* TrueType glyphs without hinting. */
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/* */
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#undef TT_CONFIG_OPTION_BYTECODE_INTERPRETER
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/*************************************************************************/
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/* */
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/* Define TT_CONFIG_OPTION_INTERPRETER_SWITCH to compile the TrueType */
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/* bytecode interpreter with a huge switch statement, rather than a call */
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/* table. This results in smaller and faster code for a number of */
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/* architectures. */
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/* */
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/* Note however that on some compiler/processor combinations, undefining */
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/* this macro will generate faster, though larger, code. */
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/* */
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#define TT_CONFIG_OPTION_INTERPRETER_SWITCH
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/*************************************************************************/
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/*************************************************************************/
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/**** ****/
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/**** T Y P E 1 D R I V E R C O N F I G U R A T I O N ****/
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/**** ****/
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/*************************************************************************/
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/*************************************************************************/
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/*************************************************************************/
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/* */
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/* T1_MAX_DICT_DEPTH is the maximal depth of nest dictionaries and */
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/* arrays in the Type 1 stream (see t1load.c). A minimum of 4 is */
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/* required. */
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/* */
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#define T1_MAX_DICT_DEPTH 5
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/*************************************************************************/
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/* */
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/* T1_MAX_SUBRS_CALLS details the maximum number of nested sub-routine */
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/* calls during glyph loading. */
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/* */
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#define T1_MAX_SUBRS_CALLS 16
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/*************************************************************************/
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/* */
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/* T1_MAX_CHARSTRING_OPERANDS is the charstring stack's capacity. A */
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/* minimum of 16 is required. */
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/* */
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/* The Chinese font MingTiEG-Medium (CNS 11643 character set) needs 256. */
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/* */
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#define T1_MAX_CHARSTRINGS_OPERANDS 256
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/*************************************************************************/
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/* */
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/* Define T1_CONFIG_OPTION_DISABLE_HINTER if you want to generate a */
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/* driver with no hinter. This can be useful to debug the parser. */
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/* */
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#undef T1_CONFIG_OPTION_DISABLE_HINTER
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/*************************************************************************/
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/* */
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/* Define this configuration macro if you want to prevent the */
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/* compilation of `t1afm', which is in charge of reading Type 1 AFM */
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/* files into an existing face. Note that if set, the T1 driver will be */
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/* unable to produce kerning distances. */
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/* */
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#undef T1_CONFIG_OPTION_NO_AFM
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/*************************************************************************/
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/* */
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/* Define this configuration macro if you want to prevent the */
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/* compilation of the Multiple Masters font support in the Type 1 */
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/* driver. */
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/* */
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#undef T1_CONFIG_OPTION_NO_MM_SUPPORT
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FT_END_HEADER
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#endif /* __FTOPTION_H__ */
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/* END */
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