# FreeType-2.6.1 API Reference

# Header File Macros

## Synopsis

FT_CONFIG_CONFIG_H | FT_LZW_H
FT_CONFIG_STANDARD_LIBRARY_H | FT_BZIP2_H
FT_CONFIG_OPTIONS_H | FT_WINFONTS_H
FT_CONFIG_MODULES_H | FT_GLYPH_H
FT_FREETYPE_H | FT_BITMAP_H
FT_ERRORS_H | FT_BBOX_H
FT_MODULE_ERRORS_H | FT_CACHE_H
FT_SYSTEM_H | FT_CACHE_IMAGE_H
FT_IMAGE_H | FT_CACHE_SMALL_BITMAPS_H
FT_TYPES_H | FT_CACHE_CHARMAP_H
FT_LIST_H | FT_MAC_H
FT_OUTLINE_H | FT_MULTIPLE_MASTERS_H
FT_SIZES_H | FT_SFNT_NAMES_H
FT_MODULE_H | FT_OPENTYPE_VALIDATE_H
FT_RENDER_H | FT_GX_VALIDATE_H
FT_AUTOHINTER_H | FT_PFR_H
FT_CFF_DRIVER_H | FT_STROKER_H
FT_TRUETYPE_DRIVER_H | FT_SYNTHESIS_H
FT_TYPE1_TABLES_H | FT_FONT_FORMATS_H
FT_TRUETYPE_IDS_H | FT_TRIGONOMETRY_H
FT_TRUETYPE_TABLES_H | FT_LCD_FILTER_H
FT_TRUETYPE_TAGS_H | FT_UNPATENTED_HINTING_H
FT_BDF_H | FT_INCREMENTAL_H
FT_CID_H | FT_GASP_H
FT_GZIP_H | FT_ADVANCES_H

The following macros are defined to the name of specific FreeType 2 header files. They can be used directly in #include statements as in:

      #include FT_FREETYPE_H
      #include FT_MULTIPLE_MASTERS_H
      #include FT_GLYPH_H

There are several reasons why we are now using macros to name public header files. The first one is that such macros are not limited to the infamous 8.3 naming rule required by DOS (and ‘FT_MULTIPLE_MASTERS_H’ is a lot more meaningful than ‘ftmm.h’).

The second reason is that it allows for more flexibility in the way FreeType 2 is installed on a given system.

### FT_CONFIG_CONFIG_H

    #ifndef FT_CONFIG_CONFIG_H
    #define FT_CONFIG_CONFIG_H  <freetype/config/ftconfig.h>
    #endif

A macro used in #include statements to name the file containing FreeType 2 configuration data.

### FT_CONFIG_STANDARD_LIBRARY_H

    #ifndef FT_CONFIG_STANDARD_LIBRARY_H
    #define FT_CONFIG_STANDARD_LIBRARY_H  <freetype/config/ftstdlib.h>
    #endif

A macro used in #include statements to name the file containing FreeType 2 interface to the standard C library functions.

### FT_CONFIG_OPTIONS_H

    #ifndef FT_CONFIG_OPTIONS_H
    #define FT_CONFIG_OPTIONS_H  <freetype/config/ftoption.h>
    #endif

A macro used in #include statements to name the file containing FreeType 2 project-specific configuration options.

### FT_CONFIG_MODULES_H

    #ifndef FT_CONFIG_MODULES_H
    #define FT_CONFIG_MODULES_H  <freetype/config/ftmodule.h>
    #endif

A macro used in #include statements to name the file containing the list of FreeType 2 modules that are statically linked to new library instances in FT_Init_FreeType.

### FT_FREETYPE_H

    #define FT_FREETYPE_H  <freetype/freetype.h>

A macro used in #include statements to name the file containing the base FreeType 2 API.

### FT_ERRORS_H

    #define FT_ERRORS_H  <freetype/fterrors.h>

A macro used in #include statements to name the file containing the list of FreeType 2 error codes (and messages).

It is included by FT_FREETYPE_H.

### FT_MODULE_ERRORS_H

    #define FT_MODULE_ERRORS_H  <freetype/ftmoderr.h>

A macro used in #include statements to name the file containing the list of FreeType 2 module error offsets (and messages).

### FT_SYSTEM_H

    #define FT_SYSTEM_H  <freetype/ftsystem.h>

A macro used in #include statements to name the file containing the FreeType 2 interface to low-level operations (i.e., memory management and stream i/o).

It is included by FT_FREETYPE_H.

### FT_IMAGE_H

    #define FT_IMAGE_H  <freetype/ftimage.h>

A macro used in #include statements to name the file containing type definitions related to glyph images (i.e., bitmaps, outlines, scan-converter parameters).

It is included by FT_FREETYPE_H.

### FT_TYPES_H

    #define FT_TYPES_H  <freetype/fttypes.h>

A macro used in #include statements to name the file containing the basic data types defined by FreeType 2.

It is included by FT_FREETYPE_H.

### FT_LIST_H

    #define FT_LIST_H  <freetype/ftlist.h>

A macro used in #include statements to name the file containing the list management API of FreeType 2.

(Most applications will never need to include this file.)

### FT_OUTLINE_H

    #define FT_OUTLINE_H  <freetype/ftoutln.h>

A macro used in #include statements to name the file containing the scalable outline management API of FreeType 2.

### FT_SIZES_H

    #define FT_SIZES_H  <freetype/ftsizes.h>

A macro used in #include statements to name the file containing the API which manages multiple FT_Size objects per face.

### FT_MODULE_H

    #define FT_MODULE_H  <freetype/ftmodapi.h>

A macro used in #include statements to name the file containing the module management API of FreeType 2.

### FT_RENDER_H

    #define FT_RENDER_H  <freetype/ftrender.h>

A macro used in #include statements to name the file containing the renderer module management API of FreeType 2.

### FT_AUTOHINTER_H

    #define FT_AUTOHINTER_H  <freetype/ftautoh.h>

A macro used in #include statements to name the file containing structures and macros related to the auto-hinting module.

### FT_CFF_DRIVER_H

    #define FT_CFF_DRIVER_H  <freetype/ftcffdrv.h>

A macro used in #include statements to name the file containing structures and macros related to the CFF driver module.

### FT_TRUETYPE_DRIVER_H

    #define FT_TRUETYPE_DRIVER_H  <freetype/ftttdrv.h>

A macro used in #include statements to name the file containing structures and macros related to the TrueType driver module.

### FT_TYPE1_TABLES_H

    #define FT_TYPE1_TABLES_H  <freetype/t1tables.h>

A macro used in #include statements to name the file containing the types and API specific to the Type 1 format.

### FT_TRUETYPE_IDS_H

    #define FT_TRUETYPE_IDS_H  <freetype/ttnameid.h>

A macro used in #include statements to name the file containing the enumeration values which identify name strings, languages, encodings, etc. This file really contains a large set of constant macro definitions, taken from the TrueType and OpenType specifications.

### FT_TRUETYPE_TABLES_H

    #define FT_TRUETYPE_TABLES_H  <freetype/tttables.h>

A macro used in #include statements to name the file containing the types and API specific to the TrueType (as well as OpenType) format.

### FT_TRUETYPE_TAGS_H

    #define FT_TRUETYPE_TAGS_H  <freetype/tttags.h>

A macro used in #include statements to name the file containing the definitions of TrueType four-byte ‘tags’ which identify blocks in SFNT-based font formats (i.e., TrueType and OpenType).

### FT_BDF_H

    #define FT_BDF_H  <freetype/ftbdf.h>

A macro used in #include statements to name the file containing the definitions of an API which accesses BDF-specific strings from a face.

### FT_CID_H

    #define FT_CID_H  <freetype/ftcid.h>

A macro used in #include statements to name the file containing the definitions of an API which access CID font information from a face.

### FT_GZIP_H

    #define FT_GZIP_H  <freetype/ftgzip.h>

A macro used in #include statements to name the file containing the definitions of an API which supports gzip-compressed files.

### FT_LZW_H

    #define FT_LZW_H  <freetype/ftlzw.h>

A macro used in #include statements to name the file containing the definitions of an API which supports LZW-compressed files.

### FT_BZIP2_H

    #define FT_BZIP2_H  <freetype/ftbzip2.h>

A macro used in #include statements to name the file containing the definitions of an API which supports bzip2-compressed files.

### FT_WINFONTS_H

    #define FT_WINFONTS_H   <freetype/ftwinfnt.h>

A macro used in #include statements to name the file containing the definitions of an API which supports Windows FNT files.

### FT_GLYPH_H

    #define FT_GLYPH_H  <freetype/ftglyph.h>

A macro used in #include statements to name the file containing the API of the optional glyph management component.

### FT_BITMAP_H

    #define FT_BITMAP_H  <freetype/ftbitmap.h>

A macro used in #include statements to name the file containing the API of the optional bitmap conversion component.

### FT_BBOX_H

    #define FT_BBOX_H  <freetype/ftbbox.h>

A macro used in #include statements to name the file containing the API of the optional exact bounding box computation routines.

### FT_CACHE_H

    #define FT_CACHE_H  <freetype/ftcache.h>

A macro used in #include statements to name the file containing the API of the optional FreeType 2 cache sub-system.

### FT_CACHE_IMAGE_H

    #define FT_CACHE_IMAGE_H  FT_CACHE_H

A macro used in #include statements to name the file containing the ‘glyph image’ API of the FreeType 2 cache sub-system.

It is used to define a cache for FT_Glyph elements. You can also use the API defined in FT_CACHE_SMALL_BITMAPS_H if you only need to store small glyph bitmaps, as it will use less memory.

This macro is deprecated. Simply include FT_CACHE_H to have all glyph image-related cache declarations.

### FT_CACHE_SMALL_BITMAPS_H

    #define FT_CACHE_SMALL_BITMAPS_H  FT_CACHE_H

A macro used in #include statements to name the file containing the ‘small bitmaps’ API of the FreeType 2 cache sub-system.

It is used to define a cache for small glyph bitmaps in a relatively memory-efficient way. You can also use the API defined in FT_CACHE_IMAGE_H if you want to cache arbitrary glyph images, including scalable outlines.

This macro is deprecated. Simply include FT_CACHE_H to have all small bitmaps-related cache declarations.

### FT_CACHE_CHARMAP_H

    #define FT_CACHE_CHARMAP_H  FT_CACHE_H

A macro used in #include statements to name the file containing the ‘charmap’ API of the FreeType 2 cache sub-system.

This macro is deprecated. Simply include FT_CACHE_H to have all charmap-based cache declarations.

### FT_MAC_H

    #define FT_MAC_H  <freetype/ftmac.h>

A macro used in #include statements to name the file containing the Macintosh-specific FreeType 2 API. The latter is used to access fonts embedded in resource forks.

This header file must be explicitly included by client applications compiled on the Mac (note that the base API still works though).

### FT_MULTIPLE_MASTERS_H

    #define FT_MULTIPLE_MASTERS_H  <freetype/ftmm.h>

A macro used in #include statements to name the file containing the optional multiple-masters management API of FreeType 2.

### FT_SFNT_NAMES_H

    #define FT_SFNT_NAMES_H  <freetype/ftsnames.h>

A macro used in #include statements to name the file containing the optional FreeType 2 API which accesses embedded ‘name’ strings in SFNT-based font formats (i.e., TrueType and OpenType).

### FT_OPENTYPE_VALIDATE_H

    #define FT_OPENTYPE_VALIDATE_H  <freetype/ftotval.h>

A macro used in #include statements to name the file containing the optional FreeType 2 API which validates OpenType tables (BASE, GDEF, GPOS, GSUB, JSTF).

### FT_GX_VALIDATE_H

    #define FT_GX_VALIDATE_H  <freetype/ftgxval.h>

A macro used in #include statements to name the file containing the optional FreeType 2 API which validates TrueTypeGX/AAT tables (feat, mort, morx, bsln, just, kern, opbd, trak, prop).

### FT_PFR_H

    #define FT_PFR_H  <freetype/ftpfr.h>

A macro used in #include statements to name the file containing the FreeType 2 API which accesses PFR-specific data.

### FT_STROKER_H

    #define FT_STROKER_H  <freetype/ftstroke.h>

A macro used in #include statements to name the file containing the FreeType 2 API which provides functions to stroke outline paths.

### FT_SYNTHESIS_H

    #define FT_SYNTHESIS_H  <freetype/ftsynth.h>

A macro used in #include statements to name the file containing the FreeType 2 API which performs artificial obliquing and emboldening.

### FT_FONT_FORMATS_H

    #define FT_FONT_FORMATS_H  <freetype/ftfntfmt.h>

      /* deprecated */
    #define FT_XFREE86_H  FT_FONT_FORMATS_H

A macro used in #include statements to name the file containing the FreeType 2 API which provides functions specific to font formats.

### FT_TRIGONOMETRY_H

    #define FT_TRIGONOMETRY_H  <freetype/fttrigon.h>

A macro used in #include statements to name the file containing the FreeType 2 API which performs trigonometric computations (e.g., cosines and arc tangents).

### FT_LCD_FILTER_H

    #define FT_LCD_FILTER_H  <freetype/ftlcdfil.h>

A macro used in #include statements to name the file containing the FreeType 2 API which performs color filtering for subpixel rendering.

### FT_UNPATENTED_HINTING_H

    #define FT_UNPATENTED_HINTING_H  <freetype/ttunpat.h>

A macro used in #include statements to name the file containing the FreeType 2 API which performs color filtering for subpixel rendering.

### FT_INCREMENTAL_H

    #define FT_INCREMENTAL_H  <freetype/ftincrem.h>

A macro used in #include statements to name the file containing the FreeType 2 API which performs color filtering for subpixel rendering.

### FT_GASP_H

    #define FT_GASP_H  <freetype/ftgasp.h>

A macro used in #include statements to name the file containing the FreeType 2 API which returns entries from the TrueType GASP table.

### FT_ADVANCES_H

    #define FT_ADVANCES_H  <freetype/ftadvanc.h>

A macro used in #include statements to name the file containing the FreeType 2 API which returns individual and ranged glyph advances.