FM / freetype

/usr/include/freetype2/freetype

Name	Size	Mode	Actions
config/	-	0755	rm
freetype.h	294004	0644	edit dl rm
ftadvanc.h	10636	0644	edit dl rm
ftbbox.h	5234	0644	edit dl rm
ftbdf.h	6793	0644	edit dl rm
ftbitmap.h	14696	0644	edit dl rm
ftbzip2.h	4299	0644	edit dl rm
ftcache.h	56579	0644	edit dl rm
ftchapters.h	9841	0644	edit dl rm
ftcid.h	5650	0644	edit dl rm
ftdriver.h	48025	0644	edit dl rm
fterrdef.h	14552	0644	edit dl rm
fterrors.h	11369	0644	edit dl rm
ftfntfmt.h	4976	0644	edit dl rm
ftgasp.h	4822	0644	edit dl rm
ftglyph.h	39385	0644	edit dl rm
ftgxval.h	13390	0644	edit dl rm
ftgzip.h	5651	0644	edit dl rm
ftimage.h	75672	0644	edit dl rm
ftincrem.h	11056	0644	edit dl rm
ftlcdfil.h	12135	0644	edit dl rm
ftlist.h	16754	0644	edit dl rm
ftlzw.h	4248	0644	edit dl rm
ftmac.h	17137	0644	edit dl rm
ftmm.h	41339	0644	edit dl rm
ftmodapi.h	38009	0644	edit dl rm
ftmoderr.h	10417	0644	edit dl rm
ftotval.h	7589	0644	edit dl rm
ftoutln.h	35736	0644	edit dl rm
ftparams.h	6313	0644	edit dl rm
ftpfr.h	6278	0644	edit dl rm
ftrender.h	11320	0644	edit dl rm
ftsizes.h	9552	0644	edit dl rm
ftsnames.h	15730	0644	edit dl rm
ftstroke.h	22293	0644	edit dl rm
ftsynth.h	4123	0644	edit dl rm
ftsystem.h	10554	0644	edit dl rm
fttrigon.h	8424	0644	edit dl rm
fttypes.h	35683	0644	edit dl rm
ftwinfnt.h	10402	0644	edit dl rm
t1tables.h	35528	0644	edit dl rm
ttnameid.h	59950	0644	edit dl rm
tttables.h	45716	0644	edit dl rm
tttags.h	5635	0644	edit dl rm

Edit: /usr/include/freetype2/freetype/freetype.h (294004B)

/***************************************************************************/
/*                                                                         */
/*  freetype.h                                                             */
/*                                                                         */
/*    FreeType high-level API and common types (specification only).       */
/*                                                                         */
/*  Copyright 1996-2018 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 FREETYPE_H_
#define FREETYPE_H_

#ifndef FT_FREETYPE_H
#error "`ft2build.h' hasn't been included yet!"
#error "Please always use macros to include FreeType header files."
#error "Example:"
#error "  #include <ft2build.h>"
#error "  #include FT_FREETYPE_H"
#endif

#include <ft2build.h>
#include FT_CONFIG_CONFIG_H
#include FT_TYPES_H
#include FT_ERRORS_H

FT_BEGIN_HEADER

/*************************************************************************/
  /*                                                                       */
  /* <Section>                                                             */
  /*    header_inclusion                                                   */
  /*                                                                       */
  /* <Title>                                                               */
  /*    FreeType's header inclusion scheme                                 */
  /*                                                                       */
  /* <Abstract>                                                            */
  /*    How client applications should include FreeType header files.      */
  /*                                                                       */
  /* <Description>                                                         */
  /*    To be as flexible as possible (and for historical reasons),        */
  /*    FreeType uses a very special inclusion scheme to load header       */
  /*    files, for example                                                 */
  /*                                                                       */
  /*    {                                                                  */
  /*      #include <ft2build.h>                                            */
  /*                                                                       */
  /*      #include FT_FREETYPE_H                                           */
  /*      #include FT_OUTLINE_H                                            */
  /*    }                                                                  */
  /*                                                                       */
  /*    A compiler and its preprocessor only needs an include path to find */
  /*    the file `ft2build.h'; the exact locations and names of the other  */
  /*    FreeType header files are hidden by preprocessor macro names,      */
  /*    loaded by `ft2build.h'.  The API documentation always gives the    */
  /*    header macro name needed for a particular function.                */
  /*                                                                       */
  /*************************************************************************/

/*************************************************************************/
  /*                                                                       */
  /* <Section>                                                             */
  /*    user_allocation                                                    */
  /*                                                                       */
  /* <Title>                                                               */
  /*    User allocation                                                    */
  /*                                                                       */
  /* <Abstract>                                                            */
  /*    How client applications should allocate FreeType data structures.  */
  /*                                                                       */
  /* <Description>                                                         */
  /*    FreeType assumes that structures allocated by the user and passed  */
  /*    as arguments are zeroed out except for the actual data.  In other  */
  /*    words, it is recommended to use `calloc' (or variants of it)       */
  /*    instead of `malloc' for allocation.                                */
  /*                                                                       */
  /*************************************************************************/

/*************************************************************************/
  /*************************************************************************/
  /*                                                                       */
  /*                        B A S I C   T Y P E S                          */
  /*                                                                       */
  /*************************************************************************/
  /*************************************************************************/

/*************************************************************************/
  /*                                                                       */
  /* <Section>                                                             */
  /*    base_interface                                                     */
  /*                                                                       */
  /* <Title>                                                               */
  /*    Base Interface                                                     */
  /*                                                                       */
  /* <Abstract>                                                            */
  /*    The FreeType~2 base font interface.                                */
  /*                                                                       */
  /* <Description>                                                         */
  /*    This section describes the most important public high-level API    */
  /*    functions of FreeType~2.                                           */
  /*                                                                       */
  /* <Order>                                                               */
  /*    FT_Library                                                         */
  /*    FT_Face                                                            */
  /*    FT_Size                                                            */
  /*    FT_GlyphSlot                                                       */
  /*    FT_CharMap                                                         */
  /*    FT_Encoding                                                        */
  /*    FT_ENC_TAG                                                         */
  /*                                                                       */
  /*    FT_FaceRec                                                         */
  /*                                                                       */
  /*    FT_FACE_FLAG_SCALABLE                                              */
  /*    FT_FACE_FLAG_FIXED_SIZES                                           */
  /*    FT_FACE_FLAG_FIXED_WIDTH                                           */
  /*    FT_FACE_FLAG_HORIZONTAL                                            */
  /*    FT_FACE_FLAG_VERTICAL                                              */
  /*    FT_FACE_FLAG_COLOR                                                 */
  /*    FT_FACE_FLAG_SFNT                                                  */
  /*    FT_FACE_FLAG_CID_KEYED                                             */
  /*    FT_FACE_FLAG_TRICKY                                                */
  /*    FT_FACE_FLAG_KERNING                                               */
  /*    FT_FACE_FLAG_MULTIPLE_MASTERS                                      */
  /*    FT_FACE_FLAG_VARIATION                                             */
  /*    FT_FACE_FLAG_GLYPH_NAMES                                           */
  /*    FT_FACE_FLAG_EXTERNAL_STREAM                                       */
  /*    FT_FACE_FLAG_HINTER                                                */
  /*                                                                       */
  /*    FT_HAS_HORIZONTAL                                                  */
  /*    FT_HAS_VERTICAL                                                    */
  /*    FT_HAS_KERNING                                                     */
  /*    FT_HAS_FIXED_SIZES                                                 */
  /*    FT_HAS_GLYPH_NAMES                                                 */
  /*    FT_HAS_COLOR                                                       */
  /*    FT_HAS_MULTIPLE_MASTERS                                            */
  /*                                                                       */
  /*    FT_IS_SFNT                                                         */
  /*    FT_IS_SCALABLE                                                     */
  /*    FT_IS_FIXED_WIDTH                                                  */
  /*    FT_IS_CID_KEYED                                                    */
  /*    FT_IS_TRICKY                                                       */
  /*    FT_IS_NAMED_INSTANCE                                               */
  /*    FT_IS_VARIATION                                                    */
  /*                                                                       */
  /*    FT_STYLE_FLAG_BOLD                                                 */
  /*    FT_STYLE_FLAG_ITALIC                                               */
  /*                                                                       */
  /*    FT_SizeRec                                                         */
  /*    FT_Size_Metrics                                                    */
  /*                                                                       */
  /*    FT_GlyphSlotRec                                                    */
  /*    FT_Glyph_Metrics                                                   */
  /*    FT_SubGlyph                                                        */
  /*                                                                       */
  /*    FT_Bitmap_Size                                                     */
  /*                                                                       */
  /*    FT_Init_FreeType                                                   */
  /*    FT_Done_FreeType                                                   */
  /*                                                                       */
  /*    FT_New_Face                                                        */
  /*    FT_Done_Face                                                       */
  /*    FT_Reference_Face                                                  */
  /*    FT_New_Memory_Face                                                 */
  /*    FT_Face_Properties                                                 */
  /*    FT_Open_Face                                                       */
  /*    FT_Open_Args                                                       */
  /*    FT_Parameter                                                       */
  /*    FT_Attach_File                                                     */
  /*    FT_Attach_Stream                                                   */
  /*                                                                       */
  /*    FT_Set_Char_Size                                                   */
  /*    FT_Set_Pixel_Sizes                                                 */
  /*    FT_Request_Size                                                    */
  /*    FT_Select_Size                                                     */
  /*    FT_Size_Request_Type                                               */
  /*    FT_Size_RequestRec                                                 */
  /*    FT_Size_Request                                                    */
  /*    FT_Set_Transform                                                   */
  /*    FT_Load_Glyph                                                      */
  /*    FT_Get_Char_Index                                                  */
  /*    FT_Get_First_Char                                                  */
  /*    FT_Get_Next_Char                                                   */
  /*    FT_Get_Name_Index                                                  */
  /*    FT_Load_Char                                                       */
  /*                                                                       */
  /*    FT_OPEN_MEMORY                                                     */
  /*    FT_OPEN_STREAM                                                     */
  /*    FT_OPEN_PATHNAME                                                   */
  /*    FT_OPEN_DRIVER                                                     */
  /*    FT_OPEN_PARAMS                                                     */
  /*                                                                       */
  /*    FT_LOAD_DEFAULT                                                    */
  /*    FT_LOAD_RENDER                                                     */
  /*    FT_LOAD_MONOCHROME                                                 */
  /*    FT_LOAD_LINEAR_DESIGN                                              */
  /*    FT_LOAD_NO_SCALE                                                   */
  /*    FT_LOAD_NO_HINTING                                                 */
  /*    FT_LOAD_NO_BITMAP                                                  */
  /*    FT_LOAD_NO_AUTOHINT                                                */
  /*    FT_LOAD_COLOR                                                      */
  /*                                                                       */
  /*    FT_LOAD_VERTICAL_LAYOUT                                            */
  /*    FT_LOAD_IGNORE_TRANSFORM                                           */
  /*    FT_LOAD_FORCE_AUTOHINT                                             */
  /*    FT_LOAD_NO_RECURSE                                                 */
  /*    FT_LOAD_PEDANTIC                                                   */
  /*                                                                       */
  /*    FT_LOAD_TARGET_NORMAL                                              */
  /*    FT_LOAD_TARGET_LIGHT                                               */
  /*    FT_LOAD_TARGET_MONO                                                */
  /*    FT_LOAD_TARGET_LCD                                                 */
  /*    FT_LOAD_TARGET_LCD_V                                               */
  /*                                                                       */
  /*    FT_LOAD_TARGET_MODE                                                */
  /*                                                                       */
  /*    FT_Render_Glyph                                                    */
  /*    FT_Render_Mode                                                     */
  /*    FT_Get_Kerning                                                     */
  /*    FT_Kerning_Mode                                                    */
  /*    FT_Get_Track_Kerning                                               */
  /*    FT_Get_Glyph_Name                                                  */
  /*    FT_Get_Postscript_Name                                             */
  /*                                                                       */
  /*    FT_CharMapRec                                                      */
  /*    FT_Select_Charmap                                                  */
  /*    FT_Set_Charmap                                                     */
  /*    FT_Get_Charmap_Index                                               */
  /*                                                                       */
  /*    FT_Get_FSType_Flags                                                */
  /*    FT_Get_SubGlyph_Info                                               */
  /*                                                                       */
  /*    FT_Face_Internal                                                   */
  /*    FT_Size_Internal                                                   */
  /*    FT_Slot_Internal                                                   */
  /*                                                                       */
  /*    FT_FACE_FLAG_XXX                                                   */
  /*    FT_STYLE_FLAG_XXX                                                  */
  /*    FT_OPEN_XXX                                                        */
  /*    FT_LOAD_XXX                                                        */
  /*    FT_LOAD_TARGET_XXX                                                 */
  /*    FT_SUBGLYPH_FLAG_XXX                                               */
  /*    FT_FSTYPE_XXX                                                      */
  /*                                                                       */
  /*    FT_HAS_FAST_GLYPHS                                                 */
  /*                                                                       */
  /*************************************************************************/

/*************************************************************************/
  /*                                                                       */
  /* <Struct>                                                              */
  /*    FT_Glyph_Metrics                                                   */
  /*                                                                       */
  /* <Description>                                                         */
  /*    A structure to model the metrics of a single glyph.  The values    */
  /*    are expressed in 26.6 fractional pixel format; if the flag         */
  /*    @FT_LOAD_NO_SCALE has been used while loading the glyph, values    */
  /*    are expressed in font units instead.                               */
  /*                                                                       */
  /* <Fields>                                                              */
  /*    width ::                                                           */
  /*      The glyph's width.                                               */
  /*                                                                       */
  /*    height ::                                                          */
  /*      The glyph's height.                                              */
  /*                                                                       */
  /*    horiBearingX ::                                                    */
  /*      Left side bearing for horizontal layout.                         */
  /*                                                                       */
  /*    horiBearingY ::                                                    */
  /*      Top side bearing for horizontal layout.                          */
  /*                                                                       */
  /*    horiAdvance ::                                                     */
  /*      Advance width for horizontal layout.                             */
  /*                                                                       */
  /*    vertBearingX ::                                                    */
  /*      Left side bearing for vertical layout.                           */
  /*                                                                       */
  /*    vertBearingY ::                                                    */
  /*      Top side bearing for vertical layout.  Larger positive values    */
  /*      mean further below the vertical glyph origin.                    */
  /*                                                                       */
  /*    vertAdvance ::                                                     */
  /*      Advance height for vertical layout.  Positive values mean the    */
  /*      glyph has a positive advance downward.                           */
  /*                                                                       */
  /* <Note>                                                                */
  /*    If not disabled with @FT_LOAD_NO_HINTING, the values represent     */
  /*    dimensions of the hinted glyph (in case hinting is applicable).    */
  /*                                                                       */
  /*    Stroking a glyph with an outside border does not increase          */
  /*    `horiAdvance' or `vertAdvance'; you have to manually adjust these  */
  /*    values to account for the added width and height.                  */
  /*                                                                       */
  /*    FreeType doesn't use the `VORG' table data for CFF fonts because   */
  /*    it doesn't have an interface to quickly retrieve the glyph height. */
  /*    The y~coordinate of the vertical origin can be simply computed as  */
  /*    `vertBearingY + height' after loading a glyph.                     */
  /*                                                                       */
  typedef struct  FT_Glyph_Metrics_
  {
    FT_Pos  width;
    FT_Pos  height;

FT_Pos  horiBearingX;
    FT_Pos  horiBearingY;
    FT_Pos  horiAdvance;

FT_Pos  vertBearingX;
    FT_Pos  vertBearingY;
    FT_Pos  vertAdvance;

} FT_Glyph_Metrics;

/*************************************************************************/
  /*                                                                       */
  /* <Struct>                                                              */
  /*    FT_Bitmap_Size                                                     */
  /*                                                                       */
  /* <Description>                                                         */
  /*    This structure models the metrics of a bitmap strike (i.e., a set  */
  /*    of glyphs for a given point size and resolution) in a bitmap font. */
  /*    It is used for the `available_sizes' field of @FT_Face.            */
  /*                                                                       */
  /* <Fields>                                                              */
  /*    height :: The vertical distance, in pixels, between two            */
  /*              consecutive baselines.  It is always positive.           */
  /*                                                                       */
  /*    width  :: The average width, in pixels, of all glyphs in the       */
  /*              strike.                                                  */
  /*                                                                       */
  /*    size   :: The nominal size of the strike in 26.6 fractional        */
  /*              points.  This field is not very useful.                  */
  /*                                                                       */
  /*    x_ppem :: The horizontal ppem (nominal width) in 26.6 fractional   */
  /*              pixels.                                                  */
  /*                                                                       */
  /*    y_ppem :: The vertical ppem (nominal height) in 26.6 fractional    */
  /*              pixels.                                                  */
  /*                                                                       */
  /* <Note>                                                                */
  /*    Windows FNT:                                                       */
  /*      The nominal size given in a FNT font is not reliable.  If the    */
  /*      driver finds it incorrect, it sets `size' to some calculated     */
  /*      values, and `x_ppem' and `y_ppem' to the pixel width and height  */
  /*      given in the font, respectively.                                 */
  /*                                                                       */
  /*    TrueType embedded bitmaps:                                         */
  /*      `size', `width', and `height' values are not contained in the    */
  /*      bitmap strike itself.  They are computed from the global font    */
  /*      parameters.                                                      */
  /*                                                                       */
  typedef struct  FT_Bitmap_Size_
  {
    FT_Short  height;
    FT_Short  width;

FT_Pos    size;

FT_Pos    x_ppem;
    FT_Pos    y_ppem;

} FT_Bitmap_Size;

/*************************************************************************/
  /*************************************************************************/
  /*                                                                       */
  /*                     O B J E C T   C L A S S E S                       */
  /*                                                                       */
  /*************************************************************************/
  /*************************************************************************/

/*************************************************************************/
  /*                                                                       */
  /* <Type>                                                                */
  /*    FT_Library                                                         */
  /*                                                                       */
  /* <Description>                                                         */
  /*    A handle to a FreeType library instance.  Each `library' is        */
  /*    completely independent from the others; it is the `root' of a set  */
  /*    of objects like fonts, faces, sizes, etc.                          */
  /*                                                                       */
  /*    It also embeds a memory manager (see @FT_Memory), as well as a     */
  /*    scan-line converter object (see @FT_Raster).                       */
  /*                                                                       */
  /*    In multi-threaded applications it is easiest to use one            */
  /*    `FT_Library' object per thread.  In case this is too cumbersome,   */
  /*    a single `FT_Library' object across threads is possible also       */
  /*    (since FreeType version 2.5.6), as long as a mutex lock is used    */
  /*    around @FT_New_Face and @FT_Done_Face.                             */
  /*                                                                       */
  /* <Note>                                                                */
  /*    Library objects are normally created by @FT_Init_FreeType, and     */
  /*    destroyed with @FT_Done_FreeType.  If you need reference-counting  */
  /*    (cf. @FT_Reference_Library), use @FT_New_Library and               */
  /*    @FT_Done_Library.                                                  */
  /*                                                                       */
  typedef struct FT_LibraryRec_  *FT_Library;

/*************************************************************************/
  /*                                                                       */
  /* <Section>                                                             */
  /*    module_management                                                  */
  /*                                                                       */
  /*************************************************************************/

/*************************************************************************/
  /*                                                                       */
  /* <Type>                                                                */
  /*    FT_Module                                                          */
  /*                                                                       */
  /* <Description>                                                         */
  /*    A handle to a given FreeType module object.  A module can be a     */
  /*    font driver, a renderer, or anything else that provides services   */
  /*    to the former.                                                     */
  /*                                                                       */
  typedef struct FT_ModuleRec_*  FT_Module;

/*************************************************************************/
  /*                                                                       */
  /* <Type>                                                                */
  /*    FT_Driver                                                          */
  /*                                                                       */
  /* <Description>                                                         */
  /*    A handle to a given FreeType font driver object.  A font driver    */
  /*    is a module capable of creating faces from font files.             */
  /*                                                                       */
  typedef struct FT_DriverRec_*  FT_Driver;

/*************************************************************************/
  /*                                                                       */
  /* <Type>                                                                */
  /*    FT_Renderer                                                        */
  /*                                                                       */
  /* <Description>                                                         */
  /*    A handle to a given FreeType renderer.  A renderer is a module in  */
  /*    charge of converting a glyph's outline image to a bitmap.  It      */
  /*    supports a single glyph image format, and one or more target       */
  /*    surface depths.                                                    */
  /*                                                                       */
  typedef struct FT_RendererRec_*  FT_Renderer;

/*************************************************************************/
  /*                                                                       */
  /* <Section>                                                             */
  /*    base_interface                                                     */
  /*                                                                       */
  /*************************************************************************/

/*************************************************************************/
  /*                                                                       */
  /* <Type>                                                                */
  /*    FT_Face                                                            */
  /*                                                                       */
  /* <Description>                                                         */
  /*    A handle to a typographic face object.  A face object models a     */
  /*    given typeface, in a given style.                                  */
  /*                                                                       */
  /* <Note>                                                                */
  /*    A face object also owns a single @FT_GlyphSlot object, as well     */
  /*    as one or more @FT_Size objects.                                   */
  /*                                                                       */
  /*    Use @FT_New_Face or @FT_Open_Face to create a new face object from */
  /*    a given filepath or a custom input stream.                         */
  /*                                                                       */
  /*    Use @FT_Done_Face to destroy it (along with its slot and sizes).   */
  /*                                                                       */
  /*    An `FT_Face' object can only be safely used from one thread at a   */
  /*    time.  Similarly, creation and destruction of `FT_Face' with the   */
  /*    same @FT_Library object can only be done from one thread at a      */
  /*    time.  On the other hand, functions like @FT_Load_Glyph and its    */
  /*    siblings are thread-safe and do not need the lock to be held as    */
  /*    long as the same `FT_Face' object is not used from multiple        */
  /*    threads at the same time.                                          */
  /*                                                                       */
  /* <Also>                                                                */
  /*    See @FT_FaceRec for the publicly accessible fields of a given face */
  /*    object.                                                            */
  /*                                                                       */
  typedef struct FT_FaceRec_*  FT_Face;

/*************************************************************************/
  /*                                                                       */
  /* <Type>                                                                */
  /*    FT_Size                                                            */
  /*                                                                       */
  /* <Description>                                                         */
  /*    A handle to an object that models a face scaled to a given         */
  /*    character size.                                                    */
  /*                                                                       */
  /* <Note>                                                                */
  /*    An @FT_Face has one _active_ @FT_Size object that is used by       */
  /*    functions like @FT_Load_Glyph to determine the scaling             */
  /*    transformation that in turn is used to load and hint glyphs and    */
  /*    metrics.                                                           */
  /*                                                                       */
  /*    You can use @FT_Set_Char_Size, @FT_Set_Pixel_Sizes,                */
  /*    @FT_Request_Size or even @FT_Select_Size to change the content     */
  /*    (i.e., the scaling values) of the active @FT_Size.                 */
  /*                                                                       */
  /*    You can use @FT_New_Size to create additional size objects for a   */
  /*    given @FT_Face, but they won't be used by other functions until    */
  /*    you activate it through @FT_Activate_Size.  Only one size can be   */
  /*    activated at any given time per face.                              */
  /*                                                                       */
  /* <Also>                                                                */
  /*    See @FT_SizeRec for the publicly accessible fields of a given size */
  /*    object.                                                            */
  /*                                                                       */
  typedef struct FT_SizeRec_*  FT_Size;

/*************************************************************************/
  /*                                                                       */
  /* <Type>                                                                */
  /*    FT_GlyphSlot                                                       */
  /*                                                                       */
  /* <Description>                                                         */
  /*    A handle to a given `glyph slot'.  A slot is a container that can  */
  /*    hold any of the glyphs contained in its parent face.               */
  /*                                                                       */
  /*    In other words, each time you call @FT_Load_Glyph or               */
  /*    @FT_Load_Char, the slot's content is erased by the new glyph data, */
  /*    i.e., the glyph's metrics, its image (bitmap or outline), and      */
  /*    other control information.                                         */
  /*                                                                       */
  /* <Also>                                                                */
  /*    See @FT_GlyphSlotRec for the publicly accessible glyph fields.     */
  /*                                                                       */
  typedef struct FT_GlyphSlotRec_*  FT_GlyphSlot;

/*************************************************************************/
  /*                                                                       */
  /* <Type>                                                                */
  /*    FT_CharMap                                                         */
  /*                                                                       */
  /* <Description>                                                         */
  /*    A handle to a character map (usually abbreviated to `charmap').  A */
  /*    charmap is used to translate character codes in a given encoding   */
  /*    into glyph indexes for its parent's face.  Some font formats may   */
  /*    provide several charmaps per font.                                 */
  /*                                                                       */
  /*    Each face object owns zero or more charmaps, but only one of them  */
  /*    can be `active', providing the data used by @FT_Get_Char_Index or  */
  /*    @FT_Load_Char.                                                     */
  /*                                                                       */
  /*    The list of available charmaps in a face is available through the  */
  /*    `face->num_charmaps' and `face->charmaps' fields of @FT_FaceRec.   */
  /*                                                                       */
  /*    The currently active charmap is available as `face->charmap'.      */
  /*    You should call @FT_Set_Charmap to change it.                      */
  /*                                                                       */
  /* <Note>                                                                */
  /*    When a new face is created (either through @FT_New_Face or         */
  /*    @FT_Open_Face), the library looks for a Unicode charmap within     */
  /*    the list and automatically activates it.  If there is no Unicode   */
  /*    charmap, FreeType doesn't set an `active' charmap.                 */
  /*                                                                       */
  /* <Also>                                                                */
  /*    See @FT_CharMapRec for the publicly accessible fields of a given   */
  /*    character map.                                                     */
  /*                                                                       */
  typedef struct FT_CharMapRec_*  FT_CharMap;

/*************************************************************************/
  /*                                                                       */
  /* <Macro>                                                               */
  /*    FT_ENC_TAG                                                         */
  /*                                                                       */
  /* <Description>                                                         */
  /*    This macro converts four-letter tags into an unsigned long.  It is */
  /*    used to define `encoding' identifiers (see @FT_Encoding).          */
  /*                                                                       */
  /* <Note>                                                                */
  /*    Since many 16-bit compilers don't like 32-bit enumerations, you    */
  /*    should redefine this macro in case of problems to something like   */
  /*    this:                                                              */
  /*                                                                       */
  /*    {                                                                  */
  /*      #define FT_ENC_TAG( value, a, b, c, d )  value                   */
  /*    }                                                                  */
  /*                                                                       */
  /*    to get a simple enumeration without assigning special numbers.     */
  /*                                                                       */

#ifndef FT_ENC_TAG
#define FT_ENC_TAG( value, a, b, c, d )         \
          value = ( ( (FT_UInt32)(a) << 24 ) |  \
                    ( (FT_UInt32)(b) << 16 ) |  \
                    ( (FT_UInt32)(c) <<  8 ) |  \
                      (FT_UInt32)(d)         )

#endif /* FT_ENC_TAG */

/*************************************************************************/
  /*                                                                       */
  /* <Enum>                                                                */
  /*    FT_Encoding                                                        */
  /*                                                                       */
  /* <Description>                                                         */
  /*    An enumeration to specify character sets supported by charmaps.    */
  /*    Used in the @FT_Select_Charmap API function.                       */
  /*                                                                       */
  /* <Note>                                                                */
  /*    Despite the name, this enumeration lists specific character        */
  /*    repertories (i.e., charsets), and not text encoding methods (e.g., */
  /*    UTF-8, UTF-16, etc.).                                              */
  /*                                                                       */
  /*    Other encodings might be defined in the future.                    */
  /*                                                                       */
  /* <Values>                                                              */
  /*    FT_ENCODING_NONE ::                                                */
  /*      The encoding value~0 is reserved.                                */
  /*                                                                       */
  /*    FT_ENCODING_UNICODE ::                                             */
  /*      The Unicode character set.  This value covers all versions of    */
  /*      the Unicode repertoire, including ASCII and Latin-1.  Most fonts */
  /*      include a Unicode charmap, but not all of them.                  */
  /*                                                                       */
  /*      For example, if you want to access Unicode value U+1F028 (and    */
  /*      the font contains it), use value 0x1F028 as the input value for  */
  /*      @FT_Get_Char_Index.                                              */
  /*                                                                       */
  /*    FT_ENCODING_MS_SYMBOL ::                                           */
  /*      Microsoft Symbol encoding, used to encode mathematical symbols   */
  /*      and wingdings.  For more information, see                        */
  /*      `https://www.microsoft.com/typography/otspec/recom.htm',         */
  /*      `http://www.kostis.net/charsets/symbol.htm', and                 */
  /*      `http://www.kostis.net/charsets/wingding.htm'.                   */
  /*                                                                       */
  /*      This encoding uses character codes from the PUA (Private Unicode */
  /*      Area) in the range U+F020-U+F0FF.                                */
  /*                                                                       */
  /*    FT_ENCODING_SJIS ::                                                */
  /*      Shift JIS encoding for Japanese.  More info at                   */
  /*      `https://en.wikipedia.org/wiki/Shift_JIS'.  See note on          */
  /*      multi-byte encodings below.                                      */
  /*                                                                       */
  /*    FT_ENCODING_PRC ::                                                 */
  /*      Corresponds to encoding systems mainly for Simplified Chinese as */
  /*      used in People's Republic of China (PRC).  The encoding layout   */
  /*      is based on GB~2312 and its supersets GBK and GB~18030.          */
  /*                                                                       */
  /*    FT_ENCODING_BIG5 ::                                                */
  /*      Corresponds to an encoding system for Traditional Chinese as     */
  /*      used in Taiwan and Hong Kong.                                    */
  /*                                                                       */
  /*    FT_ENCODING_WANSUNG ::                                             */
  /*      Corresponds to the Korean encoding system known as Extended      */
  /*      Wansung (MS Windows code page 949).                              */
  /*      For more information see                                         */
  /*      `https://www.unicode.org/Public/MAPPINGS/VENDORS/MICSFT/WindowsBestFit/bestfit949.txt'. */
  /*                                                                       */
  /*    FT_ENCODING_JOHAB ::                                               */
  /*      The Korean standard character set (KS~C 5601-1992), which        */
  /*      corresponds to MS Windows code page 1361.  This character set    */
  /*      includes all possible Hangul character combinations.             */
  /*                                                                       */
  /*    FT_ENCODING_ADOBE_LATIN_1 ::                                       */
  /*      Corresponds to a Latin-1 encoding as defined in a Type~1         */
  /*      PostScript font.  It is limited to 256 character codes.          */
  /*                                                                       */
  /*    FT_ENCODING_ADOBE_STANDARD ::                                      */
  /*      Adobe Standard encoding, as found in Type~1, CFF, and            */
  /*      OpenType/CFF fonts.  It is limited to 256 character codes.       */
  /*                                                                       */
  /*    FT_ENCODING_ADOBE_EXPERT ::                                        */
  /*      Adobe Expert encoding, as found in Type~1, CFF, and OpenType/CFF */
  /*      fonts.  It is limited to 256 character codes.                    */
  /*                                                                       */
  /*    FT_ENCODING_ADOBE_CUSTOM ::                                        */
  /*      Corresponds to a custom encoding, as found in Type~1, CFF, and   */
  /*      OpenType/CFF fonts.  It is limited to 256 character codes.       */
  /*                                                                       */
  /*    FT_ENCODING_APPLE_ROMAN ::                                         */
  /*      Apple roman encoding.  Many TrueType and OpenType fonts contain  */
  /*      a charmap for this 8-bit encoding, since older versions of Mac   */
  /*      OS are able to use it.                                           */
  /*                                                                       */
  /*    FT_ENCODING_OLD_LATIN_2 ::                                         */
  /*      This value is deprecated and was neither used nor reported by    */
  /*      FreeType.  Don't use or test for it.                             */
  /*                                                                       */
  /*    FT_ENCODING_MS_SJIS ::                                             */
  /*      Same as FT_ENCODING_SJIS.  Deprecated.                           */
  /*                                                                       */
  /*    FT_ENCODING_MS_GB2312 ::                                           */
  /*      Same as FT_ENCODING_PRC.  Deprecated.                            */
  /*                                                                       */
  /*    FT_ENCODING_MS_BIG5 ::                                             */
  /*      Same as FT_ENCODING_BIG5.  Deprecated.                           */
  /*                                                                       */
  /*    FT_ENCODING_MS_WANSUNG ::                                          */
  /*      Same as FT_ENCODING_WANSUNG.  Deprecated.                        */
  /*                                                                       */
  /*    FT_ENCODING_MS_JOHAB ::                                            */
  /*      Same as FT_ENCODING_JOHAB.  Deprecated.                          */
  /*                                                                       */
  /* <Note>                                                                */
  /*    By default, FreeType enables a Unicode charmap and tags it with    */
  /*    FT_ENCODING_UNICODE when it is either provided or can be generated */
  /*    from PostScript glyph name dictionaries in the font file.          */
  /*    All other encodings are considered legacy and tagged only if       */
  /*    explicitly defined in the font file.  Otherwise, FT_ENCODING_NONE  */
  /*    is used.                                                           */
  /*                                                                       */
  /*    FT_ENCODING_NONE is set by the BDF and PCF drivers if the charmap  */
  /*    is neither Unicode nor ISO-8859-1 (otherwise it is set to          */
  /*    FT_ENCODING_UNICODE).  Use @FT_Get_BDF_Charset_ID to find out      */
  /*    which encoding is really present.  If, for example, the            */
  /*    `cs_registry' field is `KOI8' and the `cs_encoding' field is `R',  */
  /*    the font is encoded in KOI8-R.                                     */
  /*                                                                       */
  /*    FT_ENCODING_NONE is always set (with a single exception) by the    */
  /*    winfonts driver.  Use @FT_Get_WinFNT_Header and examine the        */
  /*    `charset' field of the @FT_WinFNT_HeaderRec structure to find out  */
  /*    which encoding is really present.  For example,                    */
  /*    @FT_WinFNT_ID_CP1251 (204) means Windows code page 1251 (for       */
  /*    Russian).                                                          */
  /*                                                                       */
  /*    FT_ENCODING_NONE is set if `platform_id' is @TT_PLATFORM_MACINTOSH */
  /*    and `encoding_id' is not `TT_MAC_ID_ROMAN' (otherwise it is set to */
  /*    FT_ENCODING_APPLE_ROMAN).                                          */
  /*                                                                       */
  /*    If `platform_id' is @TT_PLATFORM_MACINTOSH, use the function       */
  /*    @FT_Get_CMap_Language_ID to query the Mac language ID that may     */
  /*    be needed to be able to distinguish Apple encoding variants.  See  */
  /*                                                                       */
  /*      https://www.unicode.org/Public/MAPPINGS/VENDORS/APPLE/Readme.txt */
  /*                                                                       */
  /*    to get an idea how to do that.  Basically, if the language ID      */
  /*    is~0, don't use it, otherwise subtract 1 from the language ID.     */
  /*    Then examine `encoding_id'.  If, for example, `encoding_id' is     */
  /*    `TT_MAC_ID_ROMAN' and the language ID (minus~1) is                 */
  /*    `TT_MAC_LANGID_GREEK', it is the Greek encoding, not Roman.        */
  /*    `TT_MAC_ID_ARABIC' with `TT_MAC_LANGID_FARSI' means the Farsi      */
  /*    variant the Arabic encoding.                                       */
  /*                                                                       */
  typedef enum  FT_Encoding_
  {
    FT_ENC_TAG( FT_ENCODING_NONE, 0, 0, 0, 0 ),

FT_ENC_TAG( FT_ENCODING_MS_SYMBOL, 's', 'y', 'm', 'b' ),
    FT_ENC_TAG( FT_ENCODING_UNICODE,   'u', 'n', 'i', 'c' ),

FT_ENC_TAG( FT_ENCODING_SJIS,    's', 'j', 'i', 's' ),
    FT_ENC_TAG( FT_ENCODING_PRC,     'g', 'b', ' ', ' ' ),
    FT_ENC_TAG( FT_ENCODING_BIG5,    'b', 'i', 'g', '5' ),
    FT_ENC_TAG( FT_ENCODING_WANSUNG, 'w', 'a', 'n', 's' ),
    FT_ENC_TAG( FT_ENCODING_JOHAB,   'j', 'o', 'h', 'a' ),

/* for backward compatibility */
    FT_ENCODING_GB2312     = FT_ENCODING_PRC,
    FT_ENCODING_MS_SJIS    = FT_ENCODING_SJIS,
    FT_ENCODING_MS_GB2312  = FT_ENCODING_PRC,
    FT_ENCODING_MS_BIG5    = FT_ENCODING_BIG5,
    FT_ENCODING_MS_WANSUNG = FT_ENCODING_WANSUNG,
    FT_ENCODING_MS_JOHAB   = FT_ENCODING_JOHAB,

FT_ENC_TAG( FT_ENCODING_ADOBE_STANDARD, 'A', 'D', 'O', 'B' ),
    FT_ENC_TAG( FT_ENCODING_ADOBE_EXPERT,   'A', 'D', 'B', 'E' ),
    FT_ENC_TAG( FT_ENCODING_ADOBE_CUSTOM,   'A', 'D', 'B', 'C' ),
    FT_ENC_TAG( FT_ENCODING_ADOBE_LATIN_1,  'l', 'a', 't', '1' ),

FT_ENC_TAG( FT_ENCODING_OLD_LATIN_2, 'l', 'a', 't', '2' ),

FT_ENC_TAG( FT_ENCODING_APPLE_ROMAN, 'a', 'r', 'm', 'n' )

} FT_Encoding;

/* these constants are deprecated; use the corresponding `FT_Encoding' */
  /* values instead                                                      */
#define ft_encoding_none            FT_ENCODING_NONE
#define ft_encoding_unicode         FT_ENCODING_UNICODE
#define ft_encoding_symbol          FT_ENCODING_MS_SYMBOL
#define ft_encoding_latin_1         FT_ENCODING_ADOBE_LATIN_1
#define ft_encoding_latin_2         FT_ENCODING_OLD_LATIN_2
#define ft_encoding_sjis            FT_ENCODING_SJIS
#define ft_encoding_gb2312          FT_ENCODING_PRC
#define ft_encoding_big5            FT_ENCODING_BIG5
#define ft_encoding_wansung         FT_ENCODING_WANSUNG
#define ft_encoding_johab           FT_ENCODING_JOHAB

#define ft_encoding_adobe_standard  FT_ENCODING_ADOBE_STANDARD
#define ft_encoding_adobe_expert    FT_ENCODING_ADOBE_EXPERT
#define ft_encoding_adobe_custom    FT_ENCODING_ADOBE_CUSTOM
#define ft_encoding_apple_roman     FT_ENCODING_APPLE_ROMAN

/*************************************************************************/
  /*                                                                       */
  /* <Struct>                                                              */
  /*    FT_CharMapRec                                                      */
  /*                                                                       */
  /* <Description>                                                         */
  /*    The base charmap structure.                                        */
  /*                                                                       */
  /* <Fields>                                                              */
  /*    face        :: A handle to the parent face object.                 */
  /*                                                                       */
  /*    encoding    :: An @FT_Encoding tag identifying the charmap.  Use   */
  /*                   this with @FT_Select_Charmap.                       */
  /*                                                                       */
  /*    platform_id :: An ID number describing the platform for the        */
  /*                   following encoding ID.  This comes directly from    */
  /*                   the TrueType specification and gets emulated for    */
  /*                   other formats.                                      */
  /*                                                                       */
  /*    encoding_id :: A platform specific encoding number.  This also     */
  /*                   comes from the TrueType specification and gets      */
  /*                   emulated similarly.                                 */
  /*                                                                       */
  typedef struct  FT_CharMapRec_
  {
    FT_Face      face;
    FT_Encoding  encoding;
    FT_UShort    platform_id;
    FT_UShort    encoding_id;

} FT_CharMapRec;

/*************************************************************************/
  /*************************************************************************/
  /*                                                                       */
  /*                 B A S E   O B J E C T   C L A S S E S                 */
  /*                                                                       */
  /*************************************************************************/
  /*************************************************************************/

/*************************************************************************/
  /*                                                                       */
  /* <Type>                                                                */
  /*    FT_Face_Internal                                                   */
  /*                                                                       */
  /* <Description>                                                         */
  /*    An opaque handle to an `FT_Face_InternalRec' structure that models */
  /*    the private data of a given @FT_Face object.                       */
  /*                                                                       */
  /*    This structure might change between releases of FreeType~2 and is  */
  /*    not generally available to client applications.                    */
  /*                                                                       */
  typedef struct FT_Face_InternalRec_*  FT_Face_Internal;

/*************************************************************************/
  /*                                                                       */
  /* <Struct>                                                              */
  /*    FT_FaceRec                                                         */
  /*                                                                       */
  /* <Description>                                                         */
  /*    FreeType root face class structure.  A face object models a        */
  /*    typeface in a font file.                                           */
  /*                                                                       */
  /* <Fields>                                                              */
  /*    num_faces           :: The number of faces in the font file.  Some */
  /*                           font formats can have multiple faces in     */
  /*                           a single font file.                         */
  /*                                                                       */
  /*    face_index          :: This field holds two different values.      */
  /*                           Bits 0-15 are the index of the face in the  */
  /*                           font file (starting with value~0).  They    */
  /*                           are set to~0 if there is only one face in   */
  /*                           the font file.                              */
  /*                                                                       */
  /*                           [Since 2.6.1] Bits 16-30 are relevant to GX */
  /*                           and OpenType variation fonts only, holding  */
  /*                           the named instance index for the current    */
  /*                           face index (starting with value~1; value~0  */
  /*                           indicates font access without a named       */
  /*                           instance).  For non-variation fonts, bits   */
  /*                           16-30 are ignored.  If we have the third    */
  /*                           named instance of face~4, say, `face_index' */
  /*                           is set to 0x00030004.                       */
  /*                                                                       */
  /*                           Bit 31 is always zero (this is,             */
  /*                           `face_index' is always a positive value).   */
  /*                                                                       */
  /*                           [Since 2.9] Changing the design coordinates */
  /*                           with @FT_Set_Var_Design_Coordinates or      */
  /*                           @FT_Set_Var_Blend_Coordinates does not      */
  /*                           influence the named instance index value    */
  /*                           (only @FT_Set_Named_Instance does that).    */
  /*                                                                       */
  /*    face_flags          :: A set of bit flags that give important      */
  /*                           information about the face; see             */
  /*                           @FT_FACE_FLAG_XXX for the details.          */
  /*                                                                       */
  /*    style_flags         :: The lower 16~bits contain a set of bit      */
  /*                           flags indicating the style of the face; see */
  /*                           @FT_STYLE_FLAG_XXX for the details.         */
  /*                                                                       */
  /*                           [Since 2.6.1] Bits 16-30 hold the number    */
  /*                           of named instances available for the        */
  /*                           current face if we have a GX or OpenType    */
  /*                           variation (sub)font.  Bit 31 is always zero */
  /*                           (this is, `style_flags' is always a         */
  /*                           positive value).  Note that a variation     */
  /*                           font has always at least one named          */
  /*                           instance, namely the default instance.      */
  /*                                                                       */
  /*    num_glyphs          :: The number of glyphs in the face.  If the   */
  /*                           face is scalable and has sbits (see         */
  /*                           `num_fixed_sizes'), it is set to the number */
  /*                           of outline glyphs.                          */
  /*                                                                       */
  /*                           For CID-keyed fonts (not in an SFNT         */
  /*                           wrapper) this value gives the highest CID   */
  /*                           used in the font.                           */
  /*                                                                       */
  /*    family_name         :: The face's family name.  This is an ASCII   */
  /*                           string, usually in English, that describes  */
  /*                           the typeface's family (like `Times New      */
  /*                           Roman', `Bodoni', `Garamond', etc).  This   */
  /*                           is a least common denominator used to list  */
  /*                           fonts.  Some formats (TrueType & OpenType)  */
  /*                           provide localized and Unicode versions of   */
  /*                           this string.  Applications should use the   */
  /*                           format specific interface to access them.   */
  /*                           Can be NULL (e.g., in fonts embedded in a   */
  /*                           PDF file).                                  */
  /*                                                                       */
  /*                           In case the font doesn't provide a specific */
  /*                           family name entry, FreeType tries to        */
  /*                           synthesize one, deriving it from other name */
  /*                           entries.                                    */
  /*                                                                       */
  /*    style_name          :: The face's style name.  This is an ASCII    */
  /*                           string, usually in English, that describes  */
  /*                           the typeface's style (like `Italic',        */
  /*                           `Bold', `Condensed', etc).  Not all font    */
  /*                           formats provide a style name, so this field */
  /*                           is optional, and can be set to NULL.  As    */
  /*                           for `family_name', some formats provide     */
  /*                           localized and Unicode versions of this      */
  /*                           string.  Applications should use the format */
  /*                           specific interface to access them.          */
  /*                                                                       */
  /*    num_fixed_sizes     :: The number of bitmap strikes in the face.   */
  /*                           Even if the face is scalable, there might   */
  /*                           still be bitmap strikes, which are called   */
  /*                           `sbits' in that case.                       */
  /*                                                                       */
  /*    available_sizes     :: An array of @FT_Bitmap_Size for all bitmap  */
  /*                           strikes in the face.  It is set to NULL if  */
  /*                           there is no bitmap strike.                  */
  /*                                                                       */
  /*                           Note that FreeType tries to sanitize the    */
  /*                           strike data since they are sometimes sloppy */
  /*                           or incorrect, but this can easily fail.     */
  /*                                                                       */
  /*    num_charmaps        :: The number of charmaps in the face.         */
  /*                                                                       */
  /*    charmaps            :: An array of the charmaps of the face.       */
  /*                                                                       */
  /*    generic             :: A field reserved for client uses.  See the  */
  /*                           @FT_Generic type description.               */
  /*                                                                       */
  /*    bbox                :: The font bounding box.  Coordinates are     */
  /*                           expressed in font units (see                */
  /*                           `units_per_EM').  The box is large enough   */
  /*                           to contain any glyph from the font.  Thus,  */
  /*                           `bbox.yMax' can be seen as the `maximum     */
  /*                           ascender', and `bbox.yMin' as the `minimum  */
  /*                           descender'.  Only relevant for scalable     */
  /*                           formats.                                    */
  /*                                                                       */
  /*                           Note that the bounding box might be off by  */
  /*                           (at least) one pixel for hinted fonts.  See */
  /*                           @FT_Size_Metrics for further discussion.    */
  /*                                                                       */
  /*    units_per_EM        :: The number of font units per EM square for  */
  /*                           this face.  This is typically 2048 for      */
  /*                           TrueType fonts, and 1000 for Type~1 fonts.  */
  /*                           Only relevant for scalable formats.         */
  /*                                                                       */
  /*    ascender            :: The typographic ascender of the face,       */
  /*                           expressed in font units.  For font formats  */
  /*                           not having this information, it is set to   */
  /*                           `bbox.yMax'.  Only relevant for scalable    */
  /*                           formats.                                    */
  /*                                                                       */
  /*    descender           :: The typographic descender of the face,      */
  /*                           expressed in font units.  For font formats  */
  /*                           not having this information, it is set to   */
  /*                           `bbox.yMin'.  Note that this field is       */
  /*                           negative for values below the baseline.     */
  /*                           Only relevant for scalable formats.         */
  /*                                                                       */
  /*    height              :: This value is the vertical distance         */
  /*                           between two consecutive baselines,          */
  /*                           expressed in font units.  It is always      */
  /*                           positive.  Only relevant for scalable       */
  /*                           formats.                                    */
  /*                                                                       */
  /*                           If you want the global glyph height, use    */
  /*                           `ascender - descender'.                     */
  /*                                                                       */
  /*    max_advance_width   :: The maximum advance width, in font units,   */
  /*                           for all glyphs in this face.  This can be   */
  /*                           used to make word wrapping computations     */
  /*                           faster.  Only relevant for scalable         */
  /*                           formats.                                    */
  /*                                                                       */
  /*    max_advance_height  :: The maximum advance height, in font units,  */
  /*                           for all glyphs in this face.  This is only  */
  /*                           relevant for vertical layouts, and is set   */
  /*                           to `height' for fonts that do not provide   */
  /*                           vertical metrics.  Only relevant for        */
  /*                           scalable formats.                           */
  /*                                                                       */
  /*    underline_position  :: The position, in font units, of the         */
  /*                           underline line for this face.  It is the    */
  /*                           center of the underlining stem.  Only       */
  /*                           relevant for scalable formats.              */
  /*                                                                       */
  /*    underline_thickness :: The thickness, in font units, of the        */
  /*                           underline for this face.  Only relevant for */
  /*                           scalable formats.                           */
  /*                                                                       */
  /*    glyph               :: The face's associated glyph slot(s).        */
  /*                                                                       */
  /*    size                :: The current active size for this face.      */
  /*                                                                       */
  /*    charmap             :: The current active charmap for this face.   */
  /*                                                                       */
  /* <Note>                                                                */
  /*    Fields may be changed after a call to @FT_Attach_File or           */
  /*    @FT_Attach_Stream.                                                 */
  /*                                                                       */
  /*    For an OpenType variation font, the values of the following fields */
  /*    can change after a call to @FT_Set_Var_Design_Coordinates (and     */
  /*    friends) if the font contains an `MVAR' table: `ascender',         */
  /*    `descender', `height', `underline_position', and                   */
  /*    `underline_thickness'.                                             */
  /*                                                                       */
  /*    Especially for TrueType fonts see also the documentation for       */
  /*    @FT_Size_Metrics.                                                  */
  /*                                                                       */
  typedef struct  FT_FaceRec_
  {
    FT_Long           num_faces;
    FT_Long           face_index;

FT_Long           face_flags;
    FT_Long           style_flags;

FT_Long           num_glyphs;

FT_String*        family_name;
    FT_String*        style_name;

FT_Int            num_fixed_sizes;
    FT_Bitmap_Size*   available_sizes;

FT_Int            num_charmaps;
    FT_CharMap*       charmaps;

FT_Generic        generic;

/*# The following member variables (down to `underline_thickness') */
    /*# are only relevant to scalable outlines; cf. @FT_Bitmap_Size    */
    /*# for bitmap fonts.                                              */
    FT_BBox           bbox;

FT_UShort         units_per_EM;
    FT_Short          ascender;
    FT_Short          descender;
    FT_Short          height;

FT_Short          max_advance_width;
    FT_Short          max_advance_height;

FT_Short          underline_position;
    FT_Short          underline_thickness;

FT_GlyphSlot      glyph;
    FT_Size           size;
    FT_CharMap        charmap;

/*@private begin */

FT_Driver         driver;
    FT_Memory         memory;
    FT_Stream         stream;

FT_ListRec        sizes_list;

FT_Generic        autohint;   /* face-specific auto-hinter data */
    void*             extensions; /* unused                         */

FT_Face_Internal  internal;

/*@private end */

} FT_FaceRec;

/*************************************************************************/
  /*                                                                       */
  /* <Enum>                                                                */
  /*    FT_FACE_FLAG_XXX                                                   */
  /*                                                                       */
  /* <Description>                                                         */
  /*    A list of bit flags used in the `face_flags' field of the          */
  /*    @FT_FaceRec structure.  They inform client applications of         */
  /*    properties of the corresponding face.                              */
  /*                                                                       */
  /* <Values>                                                              */
  /*    FT_FACE_FLAG_SCALABLE ::                                           */
  /*      The face contains outline glyphs.  Note that a face can contain  */
  /*      bitmap strikes also, i.e., a face can have both this flag and    */
  /*      @FT_FACE_FLAG_FIXED_SIZES set.                                   */
  /*                                                                       */
  /*    FT_FACE_FLAG_FIXED_SIZES ::                                        */
  /*      The face contains bitmap strikes.  See also the                  */
  /*      `num_fixed_sizes' and `available_sizes' fields of @FT_FaceRec.   */
  /*                                                                       */
  /*    FT_FACE_FLAG_FIXED_WIDTH ::                                        */
  /*      The face contains fixed-width characters (like Courier, Lucida,  */
  /*      MonoType, etc.).                                                 */
  /*                                                                       */
  /*    FT_FACE_FLAG_SFNT ::                                               */
  /*      The face uses the SFNT storage scheme.  For now, this means      */
  /*      TrueType and OpenType.                                           */
  /*                                                                       */
  /*    FT_FACE_FLAG_HORIZONTAL ::                                         */
  /*      The face contains horizontal glyph metrics.  This should be set  */
  /*      for all common formats.                                          */
  /*                                                                       */
  /*    FT_FACE_FLAG_VERTICAL ::                                           */
  /*      The face contains vertical glyph metrics.  This is only          */
  /*      available in some formats, not all of them.                      */
  /*                                                                       */
  /*    FT_FACE_FLAG_KERNING ::                                            */
  /*      The face contains kerning information.  If set, the kerning      */
  /*      distance can be retrieved using the function @FT_Get_Kerning.    */
  /*      Otherwise the function always return the vector (0,0).  Note     */
  /*      that FreeType doesn't handle kerning data from the SFNT `GPOS'   */
  /*      table (as present in many OpenType fonts).                       */
  /*                                                                       */
  /*    FT_FACE_FLAG_FAST_GLYPHS ::                                        */
  /*      THIS FLAG IS DEPRECATED.  DO NOT USE OR TEST IT.                 */
  /*                                                                       */
  /*    FT_FACE_FLAG_MULTIPLE_MASTERS ::                                   */
  /*      The face contains multiple masters and is capable of             */
  /*      interpolating between them.  Supported formats are Adobe MM,     */
  /*      TrueType GX, and OpenType variation fonts.                       */
  /*                                                                       */
  /*      See section @multiple_masters for API details.                   */
  /*                                                                       */
  /*    FT_FACE_FLAG_GLYPH_NAMES ::                                        */
  /*      The face contains glyph names, which can be retrieved using      */
  /*      @FT_Get_Glyph_Name.  Note that some TrueType fonts contain       */
  /*      broken glyph name tables.  Use the function                      */
  /*      @FT_Has_PS_Glyph_Names when needed.                              */
  /*                                                                       */
  /*    FT_FACE_FLAG_EXTERNAL_STREAM ::                                    */
  /*      Used internally by FreeType to indicate that a face's stream was */
  /*      provided by the client application and should not be destroyed   */
  /*      when @FT_Done_Face is called.  Don't read or test this flag.     */
  /*                                                                       */
  /*    FT_FACE_FLAG_HINTER ::                                             */
  /*      The font driver has a hinting machine of its own.  For example,  */
  /*      with TrueType fonts, it makes sense to use data from the SFNT    */
  /*      `gasp' table only if the native TrueType hinting engine (with    */
  /*      the bytecode interpreter) is available and active.               */
  /*                                                                       */
  /*    FT_FACE_FLAG_CID_KEYED ::                                          */
  /*      The face is CID-keyed.  In that case, the face is not accessed   */
  /*      by glyph indices but by CID values.  For subsetted CID-keyed     */
  /*      fonts this has the consequence that not all index values are a   */
  /*      valid argument to @FT_Load_Glyph.  Only the CID values for which */
  /*      corresponding glyphs in the subsetted font exist make            */
  /*      `FT_Load_Glyph' return successfully; in all other cases you get  */
  /*      an `FT_Err_Invalid_Argument' error.                              */
  /*                                                                       */
  /*      Note that CID-keyed fonts that are in an SFNT wrapper (this is,  */
  /*      all OpenType/CFF fonts) don't have this flag set since the       */
  /*      glyphs are accessed in the normal way (using contiguous          */
  /*      indices); the `CID-ness' isn't visible to the application.       */
  /*                                                                       */
  /*    FT_FACE_FLAG_TRICKY ::                                             */
  /*      The face is `tricky', this is, it always needs the font format's */
  /*      native hinting engine to get a reasonable result.  A typical     */
  /*      example is the old Chinese font `mingli.ttf' (but not            */
  /*      `mingliu.ttc') that uses TrueType bytecode instructions to move  */
  /*      and scale all of its subglyphs.                                  */
  /*                                                                       */
  /*      It is not possible to auto-hint such fonts using                 */
  /*      @FT_LOAD_FORCE_AUTOHINT; it will also ignore                     */
  /*      @FT_LOAD_NO_HINTING.  You have to set both @FT_LOAD_NO_HINTING   */
  /*      and @FT_LOAD_NO_AUTOHINT to really disable hinting; however, you */
  /*      probably never want this except for demonstration purposes.      */
  /*                                                                       */
  /*      Currently, there are about a dozen TrueType fonts in the list of */
  /*      tricky fonts; they are hard-coded in file `ttobjs.c'.            */
  /*                                                                       */
  /*    FT_FACE_FLAG_COLOR ::                                              */
  /*      [Since 2.5.1] The face has color glyph tables.  To access color  */
  /*      glyphs use @FT_LOAD_COLOR.                                       */
  /*                                                                       */
  /*    FT_FACE_FLAG_VARIATION ::                                          */
  /*      [Since 2.9] Set if the current face (or named instance) has been */
  /*      altered with @FT_Set_MM_Design_Coordinates,                      */
  /*      @FT_Set_Var_Design_Coordinates, or                               */
  /*      @FT_Set_Var_Blend_Coordinates.  This flag is unset by a call to  */
  /*      @FT_Set_Named_Instance.                                          */
  /*                                                                       */
#define FT_FACE_FLAG_SCALABLE          ( 1L <<  0 )
#define FT_FACE_FLAG_FIXED_SIZES       ( 1L <<  1 )
#define FT_FACE_FLAG_FIXED_WIDTH       ( 1L <<  2 )
#define FT_FACE_FLAG_SFNT              ( 1L <<  3 )
#define FT_FACE_FLAG_HORIZONTAL        ( 1L <<  4 )
#define FT_FACE_FLAG_VERTICAL          ( 1L <<  5 )
#define FT_FACE_FLAG_KERNING           ( 1L <<  6 )
#define FT_FACE_FLAG_FAST_GLYPHS       ( 1L <<  7 )
#define FT_FACE_FLAG_MULTIPLE_MASTERS  ( 1L <<  8 )
#define FT_FACE_FLAG_GLYPH_NAMES       ( 1L <<  9 )
#define FT_FACE_FLAG_EXTERNAL_STREAM   ( 1L << 10 )
#define FT_FACE_FLAG_HINTER            ( 1L << 11 )
#define FT_FACE_FLAG_CID_KEYED         ( 1L << 12 )
#define FT_FACE_FLAG_TRICKY            ( 1L << 13 )
#define FT_FACE_FLAG_COLOR             ( 1L << 14 )
#define FT_FACE_FLAG_VARIATION         ( 1L << 15 )

/*************************************************************************
   *
   * @macro:
   *   FT_HAS_HORIZONTAL( face )
   *
   * @description:
   *   A macro that returns true whenever a face object contains
   *   horizontal metrics (this is true for all font formats though).
   *
   * @also:
   *   @FT_HAS_VERTICAL can be used to check for vertical metrics.
   *
   */
#define FT_HAS_HORIZONTAL( face ) \
          ( (face)->face_flags & FT_FACE_FLAG_HORIZONTAL )

/*************************************************************************
   *
   * @macro:
   *   FT_HAS_VERTICAL( face )
   *
   * @description:
   *   A macro that returns true whenever a face object contains real
   *   vertical metrics (and not only synthesized ones).
   *
   */
#define FT_HAS_VERTICAL( face ) \
          ( (face)->face_flags & FT_FACE_FLAG_VERTICAL )

/*************************************************************************
   *
   * @macro:
   *   FT_HAS_KERNING( face )
   *
   * @description:
   *   A macro that returns true whenever a face object contains kerning
   *   data that can be accessed with @FT_Get_Kerning.
   *
   */
#define FT_HAS_KERNING( face ) \
          ( (face)->face_flags & FT_FACE_FLAG_KERNING )

/*************************************************************************
   *
   * @macro:
   *   FT_IS_SCALABLE( face )
   *
   * @description:
   *   A macro that returns true whenever a face object contains a scalable
   *   font face (true for TrueType, Type~1, Type~42, CID, OpenType/CFF,
   *   and PFR font formats).
   *
   */
#define FT_IS_SCALABLE( face ) \
          ( (face)->face_flags & FT_FACE_FLAG_SCALABLE )

/*************************************************************************
   *
   * @macro:
   *   FT_IS_SFNT( face )
   *
   * @description:
   *   A macro that returns true whenever a face object contains a font
   *   whose format is based on the SFNT storage scheme.  This usually
   *   means: TrueType fonts, OpenType fonts, as well as SFNT-based embedded
   *   bitmap fonts.
   *
   *   If this macro is true, all functions defined in @FT_SFNT_NAMES_H and
   *   @FT_TRUETYPE_TABLES_H are available.
   *
   */
#define FT_IS_SFNT( face ) \
          ( (face)->face_flags & FT_FACE_FLAG_SFNT )

/*************************************************************************
   *
   * @macro:
   *   FT_IS_FIXED_WIDTH( face )
   *
   * @description:
   *   A macro that returns true whenever a face object contains a font face
   *   that contains fixed-width (or `monospace', `fixed-pitch', etc.)
   *   glyphs.
   *
   */
#define FT_IS_FIXED_WIDTH( face ) \
          ( (face)->face_flags & FT_FACE_FLAG_FIXED_WIDTH )

/*************************************************************************
   *
   * @macro:
   *   FT_HAS_FIXED_SIZES( face )
   *
   * @description:
   *   A macro that returns true whenever a face object contains some
   *   embedded bitmaps.  See the `available_sizes' field of the
   *   @FT_FaceRec structure.
   *
   */
#define FT_HAS_FIXED_SIZES( face ) \
          ( (face)->face_flags & FT_FACE_FLAG_FIXED_SIZES )

/*************************************************************************
   *
   * @macro:
   *   FT_HAS_FAST_GLYPHS( face )
   *
   * @description:
   *   Deprecated.
   *
   */
#define FT_HAS_FAST_GLYPHS( face )  0

/*************************************************************************
   *
   * @macro:
   *   FT_HAS_GLYPH_NAMES( face )
   *
   * @description:
   *   A macro that returns true whenever a face object contains some glyph
   *   names that can be accessed through @FT_Get_Glyph_Name.
   *
   */
#define FT_HAS_GLYPH_NAMES( face ) \
          ( (face)->face_flags & FT_FACE_FLAG_GLYPH_NAMES )

/*************************************************************************
   *
   * @macro:
   *   FT_HAS_MULTIPLE_MASTERS( face )
   *
   * @description:
   *   A macro that returns true whenever a face object contains some
   *   multiple masters.  The functions provided by @FT_MULTIPLE_MASTERS_H
   *   are then available to choose the exact design you want.
   *
   */
#define FT_HAS_MULTIPLE_MASTERS( face ) \
          ( (face)->face_flags & FT_FACE_FLAG_MULTIPLE_MASTERS )

/*************************************************************************
   *
   * @macro:
   *   FT_IS_NAMED_INSTANCE( face )
   *
   * @description:
   *   A macro that returns true whenever a face object is a named instance
   *   of a GX or OpenType variation font.
   *
   *   [Since 2.9] Changing the design coordinates with
   *   @FT_Set_Var_Design_Coordinates or @FT_Set_Var_Blend_Coordinates does
   *   not influence the return value of this macro (only
   *   @FT_Set_Named_Instance does that).
   *
   * @since:
   *   2.7
   *
   */
#define FT_IS_NAMED_INSTANCE( face ) \
          ( (face)->face_index & 0x7FFF0000L )

/*************************************************************************
   *
   * @macro:
   *   FT_IS_VARIATION( face )
   *
   * @description:
   *   A macro that returns true whenever a face object has been altered
   *   by @FT_Set_MM_Design_Coordinates, @FT_Set_Var_Design_Coordinates, or
   *   @FT_Set_Var_Blend_Coordinates.
   *
   * @since:
   *   2.9
   *
   */
#define FT_IS_VARIATION( face ) \
          ( (face)->face_flags & FT_FACE_FLAG_VARIATION )

/*************************************************************************
   *
   * @macro:
   *   FT_IS_CID_KEYED( face )
   *
   * @description:
   *   A macro that returns true whenever a face object contains a CID-keyed
   *   font.  See the discussion of @FT_FACE_FLAG_CID_KEYED for more
   *   details.
   *
   *   If this macro is true, all functions defined in @FT_CID_H are
   *   available.
   *
   */
#define FT_IS_CID_KEYED( face ) \
          ( (face)->face_flags & FT_FACE_FLAG_CID_KEYED )

/*************************************************************************
   *
   * @macro:
   *   FT_IS_TRICKY( face )
   *
   * @description:
   *   A macro that returns true whenever a face represents a `tricky' font.
   *   See the discussion of @FT_FACE_FLAG_TRICKY for more details.
   *
   */
#define FT_IS_TRICKY( face ) \
          ( (face)->face_flags & FT_FACE_FLAG_TRICKY )

/*************************************************************************
   *
   * @macro:
   *   FT_HAS_COLOR( face )
   *
   * @description:
   *   A macro that returns true whenever a face object contains
   *   tables for color glyphs.
   *
   * @since:
   *   2.5.1
   *
   */
#define FT_HAS_COLOR( face ) \
          ( (face)->face_flags & FT_FACE_FLAG_COLOR )

/*************************************************************************/
  /*                                                                       */
  /* <Const>                                                               */
  /*    FT_STYLE_FLAG_XXX                                                  */
  /*                                                                       */
  /* <Description>                                                         */
  /*    A list of bit flags to indicate the style of a given face.  These  */
  /*    are used in the `style_flags' field of @FT_FaceRec.                */
  /*                                                                       */
  /* <Values>                                                              */
  /*    FT_STYLE_FLAG_ITALIC ::                                            */
  /*      The face style is italic or oblique.                             */
  /*                                                                       */
  /*    FT_STYLE_FLAG_BOLD ::                                              */
  /*      The face is bold.                                                */
  /*                                                                       */
  /* <Note>                                                                */
  /*    The style information as provided by FreeType is very basic.  More */
  /*    details are beyond the scope and should be done on a higher level  */
  /*    (for example, by analyzing various fields of the `OS/2' table in   */
  /*    SFNT based fonts).                                                 */
  /*                                                                       */
#define FT_STYLE_FLAG_ITALIC  ( 1 << 0 )
#define FT_STYLE_FLAG_BOLD    ( 1 << 1 )

/*************************************************************************/
  /*                                                                       */
  /* <Type>                                                                */
  /*    FT_Size_Internal                                                   */
  /*                                                                       */
  /* <Description>                                                         */
  /*    An opaque handle to an `FT_Size_InternalRec' structure, used to    */
  /*    model private data of a given @FT_Size object.                     */
  /*                                                                       */
  typedef struct FT_Size_InternalRec_*  FT_Size_Internal;

/*************************************************************************/
  /*                                                                       */
  /* <Struct>                                                              */
  /*    FT_Size_Metrics                                                    */
  /*                                                                       */
  /* <Description>                                                         */
  /*    The size metrics structure gives the metrics of a size object.     */
  /*                                                                       */
  /* <Fields>                                                              */
  /*    x_ppem       :: The width of the scaled EM square in pixels, hence */
  /*                    the term `ppem' (pixels per EM).  It is also       */
  /*                    referred to as `nominal width'.                    */
  /*                                                                       */
  /*    y_ppem       :: The height of the scaled EM square in pixels,      */
  /*                    hence the term `ppem' (pixels per EM).  It is also */
  /*                    referred to as `nominal height'.                   */
  /*                                                                       */
  /*    x_scale      :: A 16.16 fractional scaling value to convert        */
  /*                    horizontal metrics from font units to 26.6         */
  /*                    fractional pixels.  Only relevant for scalable     */
  /*                    font formats.                                      */
  /*                                                                       */
  /*    y_scale      :: A 16.16 fractional scaling value to convert        */
  /*                    vertical metrics from font units to 26.6           */
  /*                    fractional pixels.  Only relevant for scalable     */
  /*                    font formats.                                      */
  /*                                                                       */
  /*    ascender     :: The ascender in 26.6 fractional pixels, rounded up */
  /*                    to an integer value.  See @FT_FaceRec for the      */
  /*                    details.                                           */
  /*                                                                       */
  /*    descender    :: The descender in 26.6 fractional pixels, rounded   */
  /*                    down to an integer value.  See @FT_FaceRec for the */
  /*                    details.                                           */
  /*                                                                       */
  /*    height       :: The height in 26.6 fractional pixels, rounded to   */
  /*                    an integer value.  See @FT_FaceRec for the         */
  /*                    details.                                           */
  /*                                                                       */
  /*    max_advance  :: The maximum advance width in 26.6 fractional       */
  /*                    pixels, rounded to an integer value.  See          */
  /*                    @FT_FaceRec for the details.                       */
  /*                                                                       */
  /* <Note>                                                                */
  /*    The scaling values, if relevant, are determined first during a     */
  /*    size changing operation.  The remaining fields are then set by the */
  /*    driver.  For scalable formats, they are usually set to scaled      */
  /*    values of the corresponding fields in @FT_FaceRec.  Some values    */
  /*    like ascender or descender are rounded for historical reasons;     */
  /*    more precise values (for outline fonts) can be derived by scaling  */
  /*    the corresponding @FT_FaceRec values manually, with code similar   */
  /*    to the following.                                                  */
  /*                                                                       */
  /*    {                                                                  */
  /*      scaled_ascender = FT_MulFix( face->ascender,                     */
  /*                                   size_metrics->y_scale );            */
  /*    }                                                                  */
  /*                                                                       */
  /*    Note that due to glyph hinting and the selected rendering mode     */
  /*    these values are usually not exact; consequently, they must be     */
  /*    treated as unreliable with an error margin of at least one pixel!  */
  /*                                                                       */
  /*    Indeed, the only way to get the exact metrics is to render _all_   */
  /*    glyphs.  As this would be a definite performance hit, it is up to  */
  /*    client applications to perform such computations.                  */
  /*                                                                       */
  /*    The `FT_Size_Metrics' structure is valid for bitmap fonts also.    */
  /*                                                                       */
  /*                                                                       */
  /*    *TrueType* *fonts* *with* *native* *bytecode* *hinting*            */
  /*                                                                       */
  /*    All applications that handle TrueType fonts with native hinting    */
  /*    must be aware that TTFs expect different rounding of vertical font */
  /*    dimensions.  The application has to cater for this, especially if  */
  /*    it wants to rely on a TTF's vertical data (for example, to         */
  /*    properly align box characters vertically).                         */
  /*                                                                       */
  /*    Only the application knows _in_ _advance_ that it is going to use  */
  /*    native hinting for TTFs!  FreeType, on the other hand, selects the */
  /*    hinting mode not at the time of creating an @FT_Size object but    */
  /*    much later, namely while calling @FT_Load_Glyph.                   */
  /*                                                                       */
  /*    Here is some pseudo code that illustrates a possible solution.     */
  /*                                                                       */
  /*    {                                                                  */
  /*      font_format = FT_Get_Font_Format( face );                        */
  /*                                                                       */
  /*      if ( !strcmp( font_format, "TrueType" ) &&                       */
  /*           do_native_bytecode_hinting         )                        */
  /*      {                                                                */
  /*        ascender  = ROUND( FT_MulFix( face->ascender,                  */
  /*                                      size_metrics->y_scale ) );       */
  /*        descender = ROUND( FT_MulFix( face->descender,                 */
  /*                                      size_metrics->y_scale ) );       */
  /*      }                                                                */
  /*      else                                                             */
  /*      {                                                                */
  /*        ascender  = size_metrics->ascender;                            */
  /*        descender = size_metrics->descender;                           */
  /*      }                                                                */
  /*                                                                       */
  /*      height      = size_metrics->height;                              */
  /*      max_advance = size_metrics->max_advance;                         */
  /*    }                                                                  */
  /*                                                                       */
  typedef struct  FT_Size_Metrics_
  {
    FT_UShort  x_ppem;      /* horizontal pixels per EM               */
    FT_UShort  y_ppem;      /* vertical pixels per EM                 */

FT_Fixed   x_scale;     /* scaling values used to convert font    */
    FT_Fixed   y_scale;     /* units to 26.6 fractional pixels        */

FT_Pos     ascender;    /* ascender in 26.6 frac. pixels          */
    FT_Pos     descender;   /* descender in 26.6 frac. pixels         */
    FT_Pos     height;      /* text height in 26.6 frac. pixels       */
    FT_Pos     max_advance; /* max horizontal advance, in 26.6 pixels */

} FT_Size_Metrics;

/*************************************************************************/
  /*                                                                       */
  /* <Struct>                                                              */
  /*    FT_SizeRec                                                         */
  /*                                                                       */
  /* <Description>                                                         */
  /*    FreeType root size class structure.  A size object models a face   */
  /*    object at a given size.                                            */
  /*                                                                       */
  /* <Fields>                                                              */
  /*    face    :: Handle to the parent face object.                       */
  /*                                                                       */
  /*    generic :: A typeless pointer, unused by the FreeType library or   */
  /*               any of its drivers.  It can be used by client           */
  /*               applications to link their own data to each size        */
  /*               object.                                                 */
  /*                                                                       */
  /*    metrics :: Metrics for this size object.  This field is read-only. */
  /*                                                                       */
  typedef struct  FT_SizeRec_
  {
    FT_Face           face;      /* parent face object              */
    FT_Generic        generic;   /* generic pointer for client uses */
    FT_Size_Metrics   metrics;   /* size metrics                    */
    FT_Size_Internal  internal;

} FT_SizeRec;

/*************************************************************************/
  /*                                                                       */
  /* <Struct>                                                              */
  /*    FT_SubGlyph                                                        */
  /*                                                                       */
  /* <Description>                                                         */
  /*    The subglyph structure is an internal object used to describe      */
  /*    subglyphs (for example, in the case of composites).                */
  /*                                                                       */
  /* <Note>                                                                */
  /*    The subglyph implementation is not part of the high-level API,     */
  /*    hence the forward structure declaration.                           */
  /*                                                                       */
  /*    You can however retrieve subglyph information with                 */
  /*    @FT_Get_SubGlyph_Info.                                             */
  /*                                                                       */
  typedef struct FT_SubGlyphRec_*  FT_SubGlyph;

/*************************************************************************/
  /*                                                                       */
  /* <Type>                                                                */
  /*    FT_Slot_Internal                                                   */
  /*                                                                       */
  /* <Description>                                                         */
  /*    An opaque handle to an `FT_Slot_InternalRec' structure, used to    */
  /*    model private data of a given @FT_GlyphSlot object.                */
  /*                                                                       */
  typedef struct FT_Slot_InternalRec_*  FT_Slot_Internal;

/*************************************************************************/
  /*                                                                       */
  /* <Struct>                                                              */
  /*    FT_GlyphSlotRec                                                    */
  /*                                                                       */
  /* <Description>                                                         */
  /*    FreeType root glyph slot class structure.  A glyph slot is a       */
  /*    container where individual glyphs can be loaded, be they in        */
  /*    outline or bitmap format.                                          */
  /*                                                                       */
  /* <Fields>                                                              */
  /*    library           :: A handle to the FreeType library instance     */
  /*                         this slot belongs to.                         */
  /*                                                                       */
  /*    face              :: A handle to the parent face object.           */
  /*                                                                       */
  /*    next              :: In some cases (like some font tools), several */
  /*                         glyph slots per face object can be a good     */
  /*                         thing.  As this is rare, the glyph slots are  */
  /*                         listed through a direct, single-linked list   */
  /*                         using its `next' field.                       */
  /*                                                                       */
  /*    generic           :: A typeless pointer unused by the FreeType     */
  /*                         library or any of its drivers.  It can be     */
  /*                         used by client applications to link their own */
  /*                         data to each glyph slot object.               */
  /*                                                                       */
  /*    metrics           :: The metrics of the last loaded glyph in the   */
  /*                         slot.  The returned values depend on the last */
  /*                         load flags (see the @FT_Load_Glyph API        */
  /*                         function) and can be expressed either in 26.6 */
  /*                         fractional pixels or font units.              */
  /*                                                                       */
  /*                         Note that even when the glyph image is        */
  /*                         transformed, the metrics are not.             */
  /*                                                                       */
  /*    linearHoriAdvance :: The advance width of the unhinted glyph.      */
  /*                         Its value is expressed in 16.16 fractional    */
  /*                         pixels, unless @FT_LOAD_LINEAR_DESIGN is set  */
  /*                         when loading the glyph.  This field can be    */
  /*                         important to perform correct WYSIWYG layout.  */
  /*                         Only relevant for outline glyphs.             */
  /*                                                                       */
  /*    linearVertAdvance :: The advance height of the unhinted glyph.     */
  /*                         Its value is expressed in 16.16 fractional    */
  /*                         pixels, unless @FT_LOAD_LINEAR_DESIGN is set  */
  /*                         when loading the glyph.  This field can be    */
  /*                         important to perform correct WYSIWYG layout.  */
  /*                         Only relevant for outline glyphs.             */
  /*                                                                       */
  /*    advance           :: This shorthand is, depending on               */
  /*                         @FT_LOAD_IGNORE_TRANSFORM, the transformed    */
  /*                         (hinted) advance width for the glyph, in 26.6 */
  /*                         fractional pixel format.  As specified with   */
  /*                         @FT_LOAD_VERTICAL_LAYOUT, it uses either the  */
  /*                         `horiAdvance' or the `vertAdvance' value of   */
  /*                         `metrics' field.                              */
  /*                                                                       */
  /*    format            :: This field indicates the format of the image  */
  /*                         contained in the glyph slot.  Typically       */
  /*                         @FT_GLYPH_FORMAT_BITMAP,                      */
  /*                         @FT_GLYPH_FORMAT_OUTLINE, or                  */
  /*                         @FT_GLYPH_FORMAT_COMPOSITE, but other values  */
  /*                         are possible.                                 */
  /*                                                                       */
  /*    bitmap            :: This field is used as a bitmap descriptor.    */
  /*                         Note that the address and content of the      */
  /*                         bitmap buffer can change between calls of     */
  /*                         @FT_Load_Glyph and a few other functions.     */
  /*                                                                       */
  /*    bitmap_left       :: The bitmap's left bearing expressed in        */
  /*                         integer pixels.                               */
  /*                                                                       */
  /*    bitmap_top        :: The bitmap's top bearing expressed in integer */
  /*                         pixels.  This is the distance from the        */
  /*                         baseline to the top-most glyph scanline,      */
  /*                         upwards y~coordinates being *positive*.       */
  /*                                                                       */
  /*    outline           :: The outline descriptor for the current glyph  */
  /*                         image if its format is                        */
  /*                         @FT_GLYPH_FORMAT_OUTLINE.  Once a glyph is    */
  /*                         loaded, `outline' can be transformed,         */
  /*                         distorted, emboldened, etc.  However, it must */
  /*                         not be freed.                                 */
  /*                                                                       */
  /*    num_subglyphs     :: The number of subglyphs in a composite glyph. */
  /*                         This field is only valid for the composite    */
  /*                         glyph format that should normally only be     */
  /*                         loaded with the @FT_LOAD_NO_RECURSE flag.     */
  /*                                                                       */
  /*    subglyphs         :: An array of subglyph descriptors for          */
  /*                         composite glyphs.  There are `num_subglyphs'  */
  /*                         elements in there.  Currently internal to     */
  /*                         FreeType.                                     */
  /*                                                                       */
  /*    control_data      :: Certain font drivers can also return the      */
  /*                         control data for a given glyph image (e.g.    */
  /*                         TrueType bytecode, Type~1 charstrings, etc.). */
  /*                         This field is a pointer to such data; it is   */
  /*                         currently internal to FreeType.               */
  /*                                                                       */
  /*    control_len       :: This is the length in bytes of the control    */
  /*                         data.  Currently internal to FreeType.        */
  /*                                                                       */
  /*    other             :: Reserved.                                     */
  /*                                                                       */
  /*    lsb_delta         :: The difference between hinted and unhinted    */
  /*                         left side bearing while auto-hinting is       */
  /*                         active.  Zero otherwise.                      */
  /*                                                                       */
  /*    rsb_delta         :: The difference between hinted and unhinted    */
  /*                         right side bearing while auto-hinting is      */
  /*                         active.  Zero otherwise.                      */
  /*                                                                       */
  /* <Note>                                                                */
  /*    If @FT_Load_Glyph is called with default flags (see                */
  /*    @FT_LOAD_DEFAULT) the glyph image is loaded in the glyph slot in   */
  /*    its native format (e.g., an outline glyph for TrueType and Type~1  */
  /*    formats).  [Since 2.9] The prospective bitmap metrics are          */
  /*    calculated according to @FT_LOAD_TARGET_XXX and other flags even   */
  /*    for the outline glyph, even if @FT_LOAD_RENDER is not set.         */
  /*                                                                       */
  /*    This image can later be converted into a bitmap by calling         */
  /*    @FT_Render_Glyph.  This function searches the current renderer for */
  /*    the native image's format, then invokes it.                        */
  /*                                                                       */
  /*    The renderer is in charge of transforming the native image through */
  /*    the slot's face transformation fields, then converting it into a   */
  /*    bitmap that is returned in `slot->bitmap'.                         */
  /*                                                                       */
  /*    Note that `slot->bitmap_left' and `slot->bitmap_top' are also used */
  /*    to specify the position of the bitmap relative to the current pen  */
  /*    position (e.g., coordinates (0,0) on the baseline).  Of course,    */
  /*    `slot->format' is also changed to @FT_GLYPH_FORMAT_BITMAP.         */
  /*                                                                       */
  /*    Here is a small pseudo code fragment that shows how to use         */
  /*    `lsb_delta' and `rsb_delta' to do fractional positioning of        */
  /*    glyphs:                                                            */
  /*                                                                       */
  /*    {                                                                  */
  /*      FT_GlyphSlot  slot     = face->glyph;                            */
  /*      FT_Pos        origin_x = 0;                                      */
  /*                                                                       */
  /*                                                                       */
  /*      for all glyphs do                                                */
  /*        <load glyph with `FT_Load_Glyph'>                              */
  /*                                                                       */
  /*        FT_Outline_Translate( slot->outline, origin_x & 63, 0 );       */
  /*                                                                       */
  /*        <save glyph image, or render glyph, or ...>                    */
  /*                                                                       */
  /*        <compute kern between current and next glyph                   */
  /*         and add it to `origin_x'>                                     */
  /*                                                                       */
  /*        origin_x += slot->advance.x;                                   */
  /*        origin_x += slot->rsb_delta - slot->lsb_delta;                 */
  /*      endfor                                                           */
  /*    }                                                                  */
  /*                                                                       */
  /*    Here is another small pseudo code fragment that shows how to use   */
  /*    `lsb_delta' and `rsb_delta' to improve integer positioning of      */
  /*    glyphs:                                                            */
  /*                                                                       */
  /*    {                                                                  */
  /*      FT_GlyphSlot  slot           = face->glyph;                      */
  /*      FT_Pos        origin_x       = 0;                                */
  /*      FT_Pos        prev_rsb_delta = 0;                                */
  /*                                                                       */
  /*                                                                       */
  /*      for all glyphs do                                                */
  /*        <compute kern between current and previous glyph               */
  /*         and add it to `origin_x'>                                     */
  /*                                                                       */
  /*        <load glyph with `FT_Load_Glyph'>                              */
  /*                                                                       */
  /*        if ( prev_rsb_delta - slot->lsb_delta >  32 )                  */
  /*          origin_x -= 64;                                              */
  /*        else if ( prev_rsb_delta - slot->lsb_delta < -31 )             */
  /*          origin_x += 64;                                              */
  /*                                                                       */
  /*        prev_rsb_delta = slot->rsb_delta;                              */
  /*                                                                       */
  /*        <save glyph image, or render glyph, or ...>                    */
  /*                                                                       */
  /*        origin_x += slot->advance.x;                                   */
  /*      endfor                                                           */
  /*    }                                                                  */
  /*                                                                       */
  /*    If you use strong auto-hinting, you *must* apply these delta       */
  /*    values!  Otherwise you will experience far too large inter-glyph   */
  /*    spacing at small rendering sizes in most cases.  Note that it      */
  /*    doesn't harm to use the above code for other hinting modes also,   */
  /*    since the delta values are zero then.                              */
  /*                                                                       */
  typedef struct  FT_GlyphSlotRec_
  {
    FT_Library        library;
    FT_Face           face;
    FT_GlyphSlot      next;
    FT_UInt           reserved;       /* retained for binary compatibility */
    FT_Generic        generic;

FT_Glyph_Metrics  metrics;
    FT_Fixed          linearHoriAdvance;
    FT_Fixed          linearVertAdvance;
    FT_Vector         advance;

FT_Glyph_Format   format;

FT_Bitmap         bitmap;
    FT_Int            bitmap_left;
    FT_Int            bitmap_top;

FT_Outline        outline;

FT_UInt           num_subglyphs;
    FT_SubGlyph       subglyphs;

void*             control_data;
    long              control_len;

FT_Pos            lsb_delta;
    FT_Pos            rsb_delta;

void*             other;

FT_Slot_Internal  internal;

} FT_GlyphSlotRec;

/*************************************************************************/
  /*************************************************************************/
  /*                                                                       */
  /*                         F U N C T I O N S                             */
  /*                                                                       */
  /*************************************************************************/
  /*************************************************************************/

/*************************************************************************/
  /*                                                                       */
  /* <Function>                                                            */
  /*    FT_Init_FreeType                                                   */
  /*                                                                       */
  /* <Description>                                                         */
  /*    Initialize a new FreeType library object.  The set of modules      */
  /*    that are registered by this function is determined at build time.  */
  /*                                                                       */
  /* <Output>                                                              */
  /*    alibrary :: A handle to a new library object.                      */
  /*                                                                       */
  /* <Return>                                                              */
  /*    FreeType error code.  0~means success.                             */
  /*                                                                       */
  /* <Note>                                                                */
  /*    In case you want to provide your own memory allocating routines,   */
  /*    use @FT_New_Library instead, followed by a call to                 */
  /*    @FT_Add_Default_Modules (or a series of calls to @FT_Add_Module)   */
  /*    and @FT_Set_Default_Properties.                                    */
  /*                                                                       */
  /*    See the documentation of @FT_Library and @FT_Face for              */
  /*    multi-threading issues.                                            */
  /*                                                                       */
  /*    If you need reference-counting (cf. @FT_Reference_Library), use    */
  /*    @FT_New_Library and @FT_Done_Library.                              */
  /*                                                                       */
  /*    If compilation option FT_CONFIG_OPTION_ENVIRONMENT_PROPERTIES is   */
  /*    set, this function reads the `FREETYPE_PROPERTIES' environment     */
  /*    variable to control driver properties.  See section @properties    */
  /*    for more.                                                          */
  /*                                                                       */
  FT_EXPORT( FT_Error )
  FT_Init_FreeType( FT_Library  *alibrary );

/*************************************************************************/
  /*                                                                       */
  /* <Function>                                                            */
  /*    FT_Done_FreeType                                                   */
  /*                                                                       */
  /* <Description>                                                         */
  /*    Destroy a given FreeType library object and all of its children,   */
  /*    including resources, drivers, faces, sizes, etc.                   */
  /*                                                                       */
  /* <Input>                                                               */
  /*    library :: A handle to the target library object.                  */
  /*                                                                       */
  /* <Return>                                                              */
  /*    FreeType error code.  0~means success.                             */
  /*                                                                       */
  FT_EXPORT( FT_Error )
  FT_Done_FreeType( FT_Library  library );

/*************************************************************************/
  /*                                                                       */
  /* <Enum>                                                                */
  /*    FT_OPEN_XXX                                                        */
  /*                                                                       */
  /* <Description>                                                         */
  /*    A list of bit field constants used within the `flags' field of the */
  /*    @FT_Open_Args structure.                                           */
  /*                                                                       */
  /* <Values>                                                              */
  /*    FT_OPEN_MEMORY   :: This is a memory-based stream.                 */
  /*                                                                       */
  /*    FT_OPEN_STREAM   :: Copy the stream from the `stream' field.       */
  /*                                                                       */
  /*    FT_OPEN_PATHNAME :: Create a new input stream from a C~path        */
  /*                        name.                                          */
  /*                                                                       */
  /*    FT_OPEN_DRIVER   :: Use the `driver' field.                        */
  /*                                                                       */
  /*    FT_OPEN_PARAMS   :: Use the `num_params' and `params' fields.      */
  /*                                                                       */
  /* <Note>                                                                */
  /*    The `FT_OPEN_MEMORY', `FT_OPEN_STREAM', and `FT_OPEN_PATHNAME'     */
  /*    flags are mutually exclusive.                                      */
  /*                                                                       */
#define FT_OPEN_MEMORY    0x1
#define FT_OPEN_STREAM    0x2
#define FT_OPEN_PATHNAME  0x4
#define FT_OPEN_DRIVER    0x8
#define FT_OPEN_PARAMS    0x10

/* these constants are deprecated; use the corresponding `FT_OPEN_XXX' */
  /* values instead                                                      */
#define ft_open_memory    FT_OPEN_MEMORY
#define ft_open_stream    FT_OPEN_STREAM
#define ft_open_pathname  FT_OPEN_PATHNAME
#define ft_open_driver    FT_OPEN_DRIVER
#define ft_open_params    FT_OPEN_PARAMS

/*************************************************************************/
  /*                                                                       */
  /* <Struct>                                                              */
  /*    FT_Parameter                                                       */
  /*                                                                       */
  /* <Description>                                                         */
  /*    A simple structure to pass more or less generic parameters to      */
  /*    @FT_Open_Face and @FT_Face_Properties.                             */
  /*                                                                       */
  /* <Fields>                                                              */
  /*    tag  :: A four-byte identification tag.                            */
  /*                                                                       */
  /*    data :: A pointer to the parameter data.                           */
  /*                                                                       */
  /* <Note>                                                                */
  /*    The ID and function of parameters are driver-specific.  See        */
  /*    section @parameter_tags for more information.                      */
  /*                                                                       */
  typedef struct  FT_Parameter_
  {
    FT_ULong    tag;
    FT_Pointer  data;

} FT_Parameter;

/*************************************************************************/
  /*                                                                       */
  /* <Struct>                                                              */
  /*    FT_Open_Args                                                       */
  /*                                                                       */
  /* <Description>                                                         */
  /*    A structure to indicate how to open a new font file or stream.  A  */
  /*    pointer to such a structure can be used as a parameter for the     */
  /*    functions @FT_Open_Face and @FT_Attach_Stream.                     */
  /*                                                                       */
  /* <Fields>                                                              */
  /*    flags       :: A set of bit flags indicating how to use the        */
  /*                   structure.                                          */
  /*                                                                       */
  /*    memory_base :: The first byte of the file in memory.               */
  /*                                                                       */
  /*    memory_size :: The size in bytes of the file in memory.            */
  /*                                                                       */
  /*    pathname    :: A pointer to an 8-bit file pathname.                */
  /*                                                                       */
  /*    stream      :: A handle to a source stream object.                 */
  /*                                                                       */
  /*    driver      :: This field is exclusively used by @FT_Open_Face;    */
  /*                   it simply specifies the font driver to use for      */
  /*                   opening the face.  If set to NULL, FreeType tries   */
  /*                   to load the face with each one of the drivers in    */
  /*                   its list.                                           */
  /*                                                                       */
  /*    num_params  :: The number of extra parameters.                     */
  /*                                                                       */
  /*    params      :: Extra parameters passed to the font driver when     */
  /*                   opening a new face.                                 */
  /*                                                                       */
  /* <Note>                                                                */
  /*    The stream type is determined by the contents of `flags' that      */
  /*    are tested in the following order by @FT_Open_Face:                */
  /*                                                                       */
  /*    If the @FT_OPEN_MEMORY bit is set, assume that this is a           */
  /*    memory file of `memory_size' bytes, located at `memory_address'.   */
  /*    The data are not copied, and the client is responsible for         */
  /*    releasing and destroying them _after_ the corresponding call to    */
  /*    @FT_Done_Face.                                                     */
  /*                                                                       */
  /*    Otherwise, if the @FT_OPEN_STREAM bit is set, assume that a        */
  /*    custom input stream `stream' is used.                              */
  /*                                                                       */
  /*    Otherwise, if the @FT_OPEN_PATHNAME bit is set, assume that this   */
  /*    is a normal file and use `pathname' to open it.                    */
  /*                                                                       */
  /*    If the @FT_OPEN_DRIVER bit is set, @FT_Open_Face only tries to     */
  /*    open the file with the driver whose handler is in `driver'.        */
  /*                                                                       */
  /*    If the @FT_OPEN_PARAMS bit is set, the parameters given by         */
  /*    `num_params' and `params' is used.  They are ignored otherwise.    */
  /*                                                                       */
  /*    Ideally, both the `pathname' and `params' fields should be tagged  */
  /*    as `const'; this is missing for API backward compatibility.  In    */
  /*    other words, applications should treat them as read-only.          */
  /*                                                                       */
  typedef struct  FT_Open_Args_
  {
    FT_UInt         flags;
    const FT_Byte*  memory_base;
    FT_Long         memory_size;
    FT_String*      pathname;
    FT_Stream       stream;
    FT_Module       driver;
    FT_Int          num_params;
    FT_Parameter*   params;

} FT_Open_Args;

/*************************************************************************/
  /*                                                                       */
  /* <Function>                                                            */
  /*    FT_New_Face                                                        */
  /*                                                                       */
  /* <Description>                                                         */
  /*    Call @FT_Open_Face to open a font by its pathname.                 */
  /*                                                                       */
  /* <InOut>                                                               */
  /*    library    :: A handle to the library resource.                    */
  /*                                                                       */
  /* <Input>                                                               */
  /*    pathname   :: A path to the font file.                             */
  /*                                                                       */
  /*    face_index :: See @FT_Open_Face for a detailed description of this */
  /*                  parameter.                                           */
  /*                                                                       */
  /* <Output>                                                              */
  /*    aface      :: A handle to a new face object.  If `face_index' is   */
  /*                  greater than or equal to zero, it must be non-NULL.  */
  /*                                                                       */
  /* <Return>                                                              */
  /*    FreeType error code.  0~means success.                             */
  /*                                                                       */
  /* <Note>                                                                */
  /*    Use @FT_Done_Face to destroy the created @FT_Face object (along    */
  /*    with its slot and sizes).                                          */
  /*                                                                       */
  FT_EXPORT( FT_Error )
  FT_New_Face( FT_Library   library,
               const char*  filepathname,
               FT_Long      face_index,
               FT_Face     *aface );

/*************************************************************************/
  /*                                                                       */
  /* <Function>                                                            */
  /*    FT_New_Memory_Face                                                 */
  /*                                                                       */
  /* <Description>                                                         */
  /*    Call @FT_Open_Face to open a font that has been loaded into        */
  /*    memory.                                                            */
  /*                                                                       */
  /* <InOut>                                                               */
  /*    library    :: A handle to the library resource.                    */
  /*                                                                       */
  /* <Input>                                                               */
  /*    file_base  :: A pointer to the beginning of the font data.         */
  /*                                                                       */
  /*    file_size  :: The size of the memory chunk used by the font data.  */
  /*                                                                       */
  /*    face_index :: See @FT_Open_Face for a detailed description of this */
  /*                  parameter.                                           */
  /*                                                                       */
  /* <Output>                                                              */
  /*    aface      :: A handle to a new face object.  If `face_index' is   */
  /*                  greater than or equal to zero, it must be non-NULL.  */
  /*                                                                       */
  /* <Return>                                                              */
  /*    FreeType error code.  0~means success.                             */
  /*                                                                       */
  /* <Note>                                                                */
  /*    You must not deallocate the memory before calling @FT_Done_Face.   */
  /*                                                                       */
  FT_EXPORT( FT_Error )
  FT_New_Memory_Face( FT_Library      library,
                      const FT_Byte*  file_base,
                      FT_Long         file_size,
                      FT_Long         face_index,
                      FT_Face        *aface );

/*************************************************************************/
  /*                                                                       */
  /* <Function>                                                            */
  /*    FT_Open_Face                                                       */
  /*                                                                       */
  /* <Description>                                                         */
  /*    Create a face object from a given resource described by            */
  /*    @FT_Open_Args.                                                     */
  /*                                                                       */
  /* <InOut>                                                               */
  /*    library    :: A handle to the library resource.                    */
  /*                                                                       */
  /* <Input>                                                               */
  /*    args       :: A pointer to an `FT_Open_Args' structure that must   */
  /*                  be filled by the caller.                             */
  /*                                                                       */
  /*    face_index :: This field holds two different values.  Bits 0-15    */
  /*                  are the index of the face in the font file (starting */
  /*                  with value~0).  Set it to~0 if there is only one     */
  /*                  face in the font file.                               */
  /*                                                                       */
  /*                  [Since 2.6.1] Bits 16-30 are relevant to GX and      */
  /*                  OpenType variation fonts only, specifying the named  */
  /*                  instance index for the current face index (starting  */
  /*                  with value~1; value~0 makes FreeType ignore named    */
  /*                  instances).  For non-variation fonts, bits 16-30 are */
  /*                  ignored.  Assuming that you want to access the third */
  /*                  named instance in face~4, `face_index' should be set */
  /*                  to 0x00030004.  If you want to access face~4 without */
  /*                  variation handling, simply set `face_index' to       */
  /*                  value~4.                                             */
  /*                                                                       */
  /*                  `FT_Open_Face' and its siblings can be used to       */
  /*                  quickly check whether the font format of a given     */
  /*                  font resource is supported by FreeType.  In general, */
  /*                  if the `face_index' argument is negative, the        */
  /*                  function's return value is~0 if the font format is   */
  /*                  recognized, or non-zero otherwise.  The function     */
  /*                  allocates a more or less empty face handle in        */
  /*                  `*aface' (if `aface' isn't NULL); the only two       */
  /*                  useful fields in this special case are               */
  /*                  `face->num_faces' and `face->style_flags'.  For any  */
  /*                  negative value of `face_index', `face->num_faces'    */
  /*                  gives the number of faces within the font file.  For */
  /*                  the negative value `-(N+1)' (with `N' a non-negative */
  /*                  16-bit value), bits 16-30 in `face->style_flags'     */
  /*                  give the number of named instances in face `N' if we */
  /*                  have a variation font (or zero otherwise).  After    */
  /*                  examination, the returned @FT_Face structure should  */
  /*                  be deallocated with a call to @FT_Done_Face.         */
  /*                                                                       */
  /* <Output>                                                              */
  /*    aface      :: A handle to a new face object.  If `face_index' is   */
  /*                  greater than or equal to zero, it must be non-NULL.  */
  /*                                                                       */
  /* <Return>                                                              */
  /*    FreeType error code.  0~means success.                             */
  /*                                                                       */
  /* <Note>                                                                */
  /*    Unlike FreeType 1.x, this function automatically creates a glyph   */
  /*    slot for the face object that can be accessed directly through     */
  /*    `face->glyph'.                                                     */
  /*                                                                       */
  /*    Each new face object created with this function also owns a        */
  /*    default @FT_Size object, accessible as `face->size'.               */
  /*                                                                       */
  /*    One @FT_Library instance can have multiple face objects, this is,  */
  /*    @FT_Open_Face and its siblings can be called multiple times using  */
  /*    the same `library' argument.                                       */
  /*                                                                       */
  /*    See the discussion of reference counters in the description of     */
  /*    @FT_Reference_Face.                                                */
  /*                                                                       */
  /*    To loop over all faces, use code similar to the following snippet  */
  /*    (omitting the error handling).                                     */
  /*                                                                       */
  /*    {                                                                  */
  /*      ...                                                              */
  /*      FT_Face  face;                                                   */
  /*      FT_Long  i, num_faces;                                           */
  /*                                                                       */
  /*                                                                       */
  /*      error = FT_Open_Face( library, args, -1, &face );                */
  /*      if ( error ) { ... }                                             */
  /*                                                                       */
  /*      num_faces = face->num_faces;                                     */
  /*      FT_Done_Face( face );                                            */
  /*                                                                       */
  /*      for ( i = 0; i < num_faces; i++ )                                */
  /*      {                                                                */
  /*        ...                                                            */
  /*        error = FT_Open_Face( library, args, i, &face );               */
  /*        ...                                                            */
  /*        FT_Done_Face( face );                                          */
  /*        ...                                                            */
  /*      }                                                                */
  /*    }                                                                  */
  /*                                                                       */
  /*    To loop over all valid values for `face_index', use something      */
  /*    similar to the following snippet, again without error handling.    */
  /*    The code accesses all faces immediately (thus only a single call   */
  /*    of `FT_Open_Face' within the do-loop), with and without named      */
  /*    instances.                                                         */
  /*                                                                       */
  /*    {                                                                  */
  /*      ...                                                              */
  /*      FT_Face  face;                                                   */
  /*                                                                       */
  /*      FT_Long  num_faces     = 0;                                      */
  /*      FT_Long  num_instances = 0;                                      */
  /*                                                                       */
  /*      FT_Long  face_idx     = 0;                                       */
  /*      FT_Long  instance_idx = 0;                                       */
  /*                                                                       */
  /*                                                                       */
  /*      do                                                               */
  /*      {                                                                */
  /*        FT_Long  id = ( instance_idx << 16 ) + face_idx;               */
  /*                                                                       */
  /*                                                                       */
  /*        error = FT_Open_Face( library, args, id, &face );              */
  /*        if ( error ) { ... }                                           */
  /*                                                                       */
  /*        num_faces     = face->num_faces;                               */
  /*        num_instances = face->style_flags >> 16;                       */
  /*                                                                       */
  /*        ...                                                            */
  /*                                                                       */
  /*        FT_Done_Face( face );                                          */
  /*                                                                       */
  /*        if ( instance_idx < num_instances )                            */
  /*          instance_idx++;                                              */
  /*        else                                                           */
  /*        {                                                              */
  /*          face_idx++;                                                  */
  /*          instance_idx = 0;                                            */
  /*        }                                                              */
  /*                                                                       */
  /*      } while ( face_idx < num_faces )                                 */
  /*    }                                                                  */
  /*                                                                       */
  FT_EXPORT( FT_Error )
  FT_Open_Face( FT_Library           library,
                const FT_Open_Args*  args,
                FT_Long              face_index,
                FT_Face             *aface );

/*************************************************************************/
  /*                                                                       */
  /* <Function>                                                            */
  /*    FT_Attach_File                                                     */
  /*                                                                       */
  /* <Description>                                                         */
  /*    Call @FT_Attach_Stream to attach a file.                           */
  /*                                                                       */
  /* <InOut>                                                               */
  /*    face         :: The target face object.                            */
  /*                                                                       */
  /* <Input>                                                               */
  /*    filepathname :: The pathname.                                      */
  /*                                                                       */
  /* <Return>                                                              */
  /*    FreeType error code.  0~means success.                             */
  /*                                                                       */
  FT_EXPORT( FT_Error )
  FT_Attach_File( FT_Face      face,
                  const char*  filepathname );

/*************************************************************************/
  /*                                                                       */
  /* <Function>                                                            */
  /*    FT_Attach_Stream                                                   */
  /*                                                                       */
  /* <Description>                                                         */
  /*    `Attach' data to a face object.  Normally, this is used to read    */
  /*    additional information for the face object.  For example, you can  */
  /*    attach an AFM file that comes with a Type~1 font to get the        */
  /*    kerning values and other metrics.                                  */
  /*                                                                       */
  /* <InOut>                                                               */
  /*    face       :: The target face object.                              */
  /*                                                                       */
  /* <Input>                                                               */
  /*    parameters :: A pointer to @FT_Open_Args that must be filled by    */
  /*                  the caller.                                          */
  /*                                                                       */
  /* <Return>                                                              */
  /*    FreeType error code.  0~means success.                             */
  /*                                                                       */
  /* <Note>                                                                */
  /*    The meaning of the `attach' (i.e., what really happens when the    */
  /*    new file is read) is not fixed by FreeType itself.  It really      */
  /*    depends on the font format (and thus the font driver).             */
  /*                                                                       */
  /*    Client applications are expected to know what they are doing       */
  /*    when invoking this function.  Most drivers simply do not implement */
  /*    file or stream attachments.                                        */
  /*                                                                       */
  FT_EXPORT( FT_Error )
  FT_Attach_Stream( FT_Face        face,
                    FT_Open_Args*  parameters );

/*************************************************************************/
  /*                                                                       */
  /* <Function>                                                            */
  /*    FT_Reference_Face                                                  */
  /*                                                                       */
  /* <Description>                                                         */
  /*    A counter gets initialized to~1 at the time an @FT_Face structure  */
  /*    is created.  This function increments the counter.  @FT_Done_Face  */
  /*    then only destroys a face if the counter is~1, otherwise it simply */
  /*    decrements the counter.                                            */
  /*                                                                       */
  /*    This function helps in managing life-cycles of structures that     */
  /*    reference @FT_Face objects.                                        */
  /*                                                                       */
  /* <Input>                                                               */
  /*    face :: A handle to a target face object.                          */
  /*                                                                       */
  /* <Return>                                                              */
  /*    FreeType error code.  0~means success.                             */
  /*                                                                       */
  /* <Since>                                                               */
  /*    2.4.2                                                              */
  /*                                                                       */
  FT_EXPORT( FT_Error )
  FT_Reference_Face( FT_Face  face );

/*************************************************************************/
  /*                                                                       */
  /* <Function>                                                            */
  /*    FT_Done_Face                                                       */
  /*                                                                       */
  /* <Description>                                                         */
  /*    Discard a given face object, as well as all of its child slots and */
  /*    sizes.                                                             */
  /*                                                                       */
  /* <Input>                                                               */
  /*    face :: A handle to a target face object.                          */
  /*                                                                       */
  /* <Return>                                                              */
  /*    FreeType error code.  0~means success.                             */
  /*                                                                       */
  /* <Note>                                                                */
  /*    See the discussion of reference counters in the description of     */
  /*    @FT_Reference_Face.                                                */
  /*                                                                       */
  FT_EXPORT( FT_Error )
  FT_Done_Face( FT_Face  face );

/*************************************************************************/
  /*                                                                       */
  /* <Function>                                                            */
  /*    FT_Select_Size                                                     */
  /*                                                                       */
  /* <Description>                                                         */
  /*    Select a bitmap strike.  To be more precise, this function sets    */
  /*    the scaling factors of the active @FT_Size object in a face so     */
  /*    that bitmaps from this particular strike are taken by              */
  /*    @FT_Load_Glyph and friends.                                        */
  /*                                                                       */
  /* <InOut>                                                               */
  /*    face         :: A handle to a target face object.                  */
  /*                                                                       */
  /* <Input>                                                               */
  /*    strike_index :: The index of the bitmap strike in the              */
  /*                    `available_sizes' field of @FT_FaceRec structure.  */
  /*                                                                       */
  /* <Return>                                                              */
  /*    FreeType error code.  0~means success.                             */
  /*                                                                       */
  /* <Note>                                                                */
  /*    For bitmaps embedded in outline fonts it is common that only a     */
  /*    subset of the available glyphs at a given ppem value is available. */
  /*    FreeType silently uses outlines if there is no bitmap for a given  */
  /*    glyph index.                                                       */
  /*                                                                       */
  /*    For GX and OpenType variation fonts, a bitmap strike makes sense   */
  /*    only if the default instance is active (this is, no glyph          */
  /*    variation takes place); otherwise, FreeType simply ignores bitmap  */
  /*    strikes.  The same is true for all named instances that are        */
  /*    different from the default instance.                               */
  /*                                                                       */
  /*    Don't use this function if you are using the FreeType cache API.   */
  /*                                                                       */
  FT_EXPORT( FT_Error )
  FT_Select_Size( FT_Face  face,
                  FT_Int   strike_index );

/*************************************************************************/
  /*                                                                       */
  /* <Enum>                                                                */
  /*    FT_Size_Request_Type                                               */
  /*                                                                       */
  /* <Description>                                                         */
  /*    An enumeration type that lists the supported size request types,   */
  /*    i.e., what input size (in font units) maps to the requested output */
  /*    size (in pixels, as computed from the arguments of                 */
  /*    @FT_Size_Request).                                                 */
  /*                                                                       */
  /* <Values>                                                              */
  /*    FT_SIZE_REQUEST_TYPE_NOMINAL ::                                    */
  /*      The nominal size.  The `units_per_EM' field of @FT_FaceRec is    */
  /*      used to determine both scaling values.                           */
  /*                                                                       */
  /*      This is the standard scaling found in most applications.  In     */
  /*      particular, use this size request type for TrueType fonts if     */
  /*      they provide optical scaling or something similar.  Note,        */
  /*      however, that `units_per_EM' is a rather abstract value which    */
  /*      bears no relation to the actual size of the glyphs in a font.    */
  /*                                                                       */
  /*    FT_SIZE_REQUEST_TYPE_REAL_DIM ::                                   */
  /*      The real dimension.  The sum of the `ascender' and (minus of)    */
  /*      the `descender' fields of @FT_FaceRec is used to determine both  */
  /*      scaling values.                                                  */
  /*                                                                       */
  /*    FT_SIZE_REQUEST_TYPE_BBOX ::                                       */
  /*      The font bounding box.  The width and height of the `bbox' field */
  /*      of @FT_FaceRec are used to determine the horizontal and vertical */
  /*      scaling value, respectively.                                     */
  /*                                                                       */
  /*    FT_SIZE_REQUEST_TYPE_CELL ::                                       */
  /*      The `max_advance_width' field of @FT_FaceRec is used to          */
  /*      determine the horizontal scaling value; the vertical scaling     */
  /*      value is determined the same way as                              */
  /*      @FT_SIZE_REQUEST_TYPE_REAL_DIM does.  Finally, both scaling      */
  /*      values are set to the smaller one.  This type is useful if you   */
  /*      want to specify the font size for, say, a window of a given      */
  /*      dimension and 80x24 cells.                                       */
  /*                                                                       */
  /*    FT_SIZE_REQUEST_TYPE_SCALES ::                                     */
  /*      Specify the scaling values directly.                             */
  /*                                                                       */
  /* <Note>                                                                */
  /*    The above descriptions only apply to scalable formats.  For bitmap */
  /*    formats, the behaviour is up to the driver.                        */
  /*                                                                       */
  /*    See the note section of @FT_Size_Metrics if you wonder how size    */
  /*    requesting relates to scaling values.                              */
  /*                                                                       */
  typedef enum  FT_Size_Request_Type_
  {
    FT_SIZE_REQUEST_TYPE_NOMINAL,
    FT_SIZE_REQUEST_TYPE_REAL_DIM,
    FT_SIZE_REQUEST_TYPE_BBOX,
    FT_SIZE_REQUEST_TYPE_CELL,
    FT_SIZE_REQUEST_TYPE_SCALES,

FT_SIZE_REQUEST_TYPE_MAX

} FT_Size_Request_Type;

/*************************************************************************/
  /*                                                                       */
  /* <Struct>                                                              */
  /*    FT_Size_RequestRec                                                 */
  /*                                                                       */
  /* <Description>                                                         */
  /*    A structure to model a size request.                               */
  /*                                                                       */
  /* <Fields>                                                              */
  /*    type           :: See @FT_Size_Request_Type.                       */
  /*                                                                       */
  /*    width          :: The desired width, given as a 26.6 fractional    */
  /*                      point value (with 72pt = 1in).                   */
  /*                                                                       */
  /*    height         :: The desired height, given as a 26.6 fractional   */
  /*                      point value (with 72pt = 1in).                   */
  /*                                                                       */
  /*    horiResolution :: The horizontal resolution (dpi, i.e., pixels per */
  /*                      inch).  If set to zero, `width' is treated as a  */
  /*                      26.6 fractional *pixel* value, which gets        */
  /*                      internally rounded to an integer.                */
  /*                                                                       */
  /*    vertResolution :: The vertical resolution (dpi, i.e., pixels per   */
  /*                      inch).  If set to zero, `height' is treated as a */
  /*                      26.6 fractional *pixel* value, which gets        */
  /*                      internally rounded to an integer.                */
  /*                                                                       */
  /* <Note>                                                                */
  /*    If `width' is zero, the horizontal scaling value is set equal      */
  /*    to the vertical scaling value, and vice versa.                     */
  /*                                                                       */
  /*    If `type' is FT_SIZE_REQUEST_TYPE_SCALES, `width' and `height' are */
  /*    interpreted directly as 16.16 fractional scaling values, without   */
  /*    any further modification, and both `horiResolution' and            */
  /*    `vertResolution' are ignored.                                      */
  /*                                                                       */
  typedef struct  FT_Size_RequestRec_
  {
    FT_Size_Request_Type  type;
    FT_Long               width;
    FT_Long               height;
    FT_UInt               horiResolution;
    FT_UInt               vertResolution;

} FT_Size_RequestRec;

/*************************************************************************/
  /*                                                                       */
  /* <Struct>                                                              */
  /*    FT_Size_Request                                                    */
  /*                                                                       */
  /* <Description>                                                         */
  /*    A handle to a size request structure.                              */
  /*                                                                       */
  typedef struct FT_Size_RequestRec_  *FT_Size_Request;

/*************************************************************************/
  /*                                                                       */
  /* <Function>                                                            */
  /*    FT_Request_Size                                                    */
  /*                                                                       */
  /* <Description>                                                         */
  /*    Resize the scale of the active @FT_Size object in a face.          */
  /*                                                                       */
  /* <InOut>                                                               */
  /*    face :: A handle to a target face object.                          */
  /*                                                                       */
  /* <Input>                                                               */
  /*    req  :: A pointer to a @FT_Size_RequestRec.                        */
  /*                                                                       */
  /* <Return>                                                              */
  /*    FreeType error code.  0~means success.                             */
  /*                                                                       */
  /* <Note>                                                                */
  /*    Although drivers may select the bitmap strike matching the         */
  /*    request, you should not rely on this if you intend to select a     */
  /*    particular bitmap strike.  Use @FT_Select_Size instead in that     */
  /*    case.                                                              */
  /*                                                                       */
  /*    The relation between the requested size and the resulting glyph    */
  /*    size is dependent entirely on how the size is defined in the       */
  /*    source face.  The font designer chooses the final size of each     */
  /*    glyph relative to this size.  For more information refer to        */
  /*    `https://www.freetype.org/freetype2/docs/glyphs/glyphs-2.html'.    */
  /*                                                                       */
  /*    Contrary to @FT_Set_Char_Size, this function doesn't have special  */
  /*    code to normalize zero-valued widths, heights, or resolutions      */
  /*    (which lead to errors in most cases).                              */
  /*                                                                       */
  /*    Don't use this function if you are using the FreeType cache API.   */
  /*                                                                       */
  FT_EXPORT( FT_Error )
  FT_Request_Size( FT_Face          face,
                   FT_Size_Request  req );

/*************************************************************************/
  /*                                                                       */
  /* <Function>                                                            */
  /*    FT_Set_Char_Size                                                   */
  /*                                                                       */
  /* <Description>                                                         */
  /*    Call @FT_Request_Size to request the nominal size (in points).     */
  /*                                                                       */
  /* <InOut>                                                               */
  /*    face            :: A handle to a target face object.               */
  /*                                                                       */
  /* <Input>                                                               */
  /*    char_width      :: The nominal width, in 26.6 fractional points.   */
  /*                                                                       */
  /*    char_height     :: The nominal height, in 26.6 fractional points.  */
  /*                                                                       */
  /*    horz_resolution :: The horizontal resolution in dpi.               */
  /*                                                                       */
  /*    vert_resolution :: The vertical resolution in dpi.                 */
  /*                                                                       */
  /* <Return>                                                              */
  /*    FreeType error code.  0~means success.                             */
  /*                                                                       */
  /* <Note>                                                                */
  /*    While this function allows fractional points as input values, the  */
  /*    resulting ppem value for the given resolution is always rounded to */
  /*    the nearest integer.                                               */
  /*                                                                       */
  /*    If either the character width or height is zero, it is set equal   */
  /*    to the other value.                                                */
  /*                                                                       */
  /*    If either the horizontal or vertical resolution is zero, it is set */
  /*    equal to the other value.                                          */
  /*                                                                       */
  /*    A character width or height smaller than 1pt is set to 1pt; if     */
  /*    both resolution values are zero, they are set to 72dpi.            */
  /*                                                                       */
  /*    Don't use this function if you are using the FreeType cache API.   */
  /*                                                                       */
  FT_EXPORT( FT_Error )
  FT_Set_Char_Size( FT_Face     face,
                    FT_F26Dot6  char_width,
                    FT_F26Dot6  char_height,
                    FT_UInt     horz_resolution,
                    FT_UInt     vert_resolution );

/*************************************************************************/
  /*                                                                       */
  /* <Function>                                                            */
  /*    FT_Set_Pixel_Sizes                                                 */
  /*                                                                       */
  /* <Description>                                                         */
  /*    Call @FT_Request_Size to request the nominal size (in pixels).     */
  /*                                                                       */
  /* <InOut>                                                               */
  /*    face         :: A handle to the target face object.                */
  /*                                                                       */
  /* <Input>                                                               */
  /*    pixel_width  :: The nominal width, in pixels.                      */
  /*                                                                       */
  /*    pixel_height :: The nominal height, in pixels.                     */
  /*                                                                       */
  /* <Return>                                                              */
  /*    FreeType error code.  0~means success.                             */
  /*                                                                       */
  /* <Note>                                                                */
  /*    You should not rely on the resulting glyphs matching or being      */
  /*    constrained to this pixel size.  Refer to @FT_Request_Size to      */
  /*    understand how requested sizes relate to actual sizes.             */
  /*                                                                       */
  /*    Don't use this function if you are using the FreeType cache API.   */
  /*                                                                       */
  FT_EXPORT( FT_Error )
  FT_Set_Pixel_Sizes( FT_Face  face,
                      FT_UInt  pixel_width,
                      FT_UInt  pixel_height );

/*************************************************************************/
  /*                                                                       */
  /* <Function>                                                            */
  /*    FT_Load_Glyph                                                      */
  /*                                                                       */
  /* <Description>                                                         */
  /*    Load a glyph into the glyph slot of a face object.                 */
  /*                                                                       */
  /* <InOut>                                                               */
  /*    face        :: A handle to the target face object where the glyph  */
  /*                   is loaded.                                          */
  /*                                                                       */
  /* <Input>                                                               */
  /*    glyph_index :: The index of the glyph in the font file.  For       */
  /*                   CID-keyed fonts (either in PS or in CFF format)     */
  /*                   this argument specifies the CID value.              */
  /*                                                                       */
  /*    load_flags  :: A flag indicating what to load for this glyph.  The */
  /*                   @FT_LOAD_XXX constants can be used to control the   */
  /*                   glyph loading process (e.g., whether the outline    */
  /*                   should be scaled, whether to load bitmaps or not,   */
  /*                   whether to hint the outline, etc).                  */
  /*                                                                       */
  /* <Return>                                                              */
  /*    FreeType error code.  0~means success.                             */
  /*                                                                       */
  /* <Note>                                                                */
  /*    The loaded glyph may be transformed.  See @FT_Set_Transform for    */
  /*    the details.                                                       */
  /*                                                                       */
  /*    For subsetted CID-keyed fonts, `FT_Err_Invalid_Argument' is        */
  /*    returned for invalid CID values (this is, for CID values that      */
  /*    don't have a corresponding glyph in the font).  See the discussion */
  /*    of the @FT_FACE_FLAG_CID_KEYED flag for more details.              */
  /*                                                                       */
  /*    If you receive `FT_Err_Glyph_Too_Big', try getting the glyph       */
  /*    outline at EM size, then scale it manually and fill it as a        */
  /*    graphics operation.                                                */
  /*                                                                       */
  FT_EXPORT( FT_Error )
  FT_Load_Glyph( FT_Face   face,
                 FT_UInt   glyph_index,
                 FT_Int32  load_flags );

/*************************************************************************/
  /*                                                                       */
  /* <Function>                                                            */
  /*    FT_Load_Char                                                       */
  /*                                                                       */
  /* <Description>                                                         */
  /*    Load a glyph into the glyph slot of a face object, accessed by its */
  /*    character code.                                                    */
  /*                                                                       */
  /* <InOut>                                                               */
  /*    face        :: A handle to a target face object where the glyph    */
  /*                   is loaded.                                          */
  /*                                                                       */
  /* <Input>                                                               */
  /*    char_code   :: The glyph's character code, according to the        */
  /*                   current charmap used in the face.                   */
  /*                                                                       */
  /*    load_flags  :: A flag indicating what to load for this glyph.  The */
  /*                   @FT_LOAD_XXX constants can be used to control the   */
  /*                   glyph loading process (e.g., whether the outline    */
  /*                   should be scaled, whether to load bitmaps or not,   */
  /*                   whether to hint the outline, etc).                  */
  /*                                                                       */
  /* <Return>                                                              */
  /*    FreeType error code.  0~means success.                             */
  /*                                                                       */
  /* <Note>                                                                */
  /*    This function simply calls @FT_Get_Char_Index and @FT_Load_Glyph.  */
  /*                                                                       */
  /*    Many fonts contain glyphs that can't be loaded by this function    */
  /*    since its glyph indices are not listed in any of the font's        */
  /*    charmaps.                                                          */
  /*                                                                       */
  /*    If no active cmap is set up (i.e., `face->charmap' is zero), the   */
  /*    call to @FT_Get_Char_Index is omitted, and the function behaves    */
  /*    identically to @FT_Load_Glyph.                                     */
  /*                                                                       */
  FT_EXPORT( FT_Error )
  FT_Load_Char( FT_Face   face,
                FT_ULong  char_code,
                FT_Int32  load_flags );

/*************************************************************************
   *
   * @enum:
   *   FT_LOAD_XXX
   *
   * @description:
   *   A list of bit field constants for @FT_Load_Glyph to indicate what
   *   kind of operations to perform during glyph loading.
   *
   * @values:
   *   FT_LOAD_DEFAULT ::
   *     Corresponding to~0, this value is used as the default glyph load
   *     operation.  In this case, the following happens:
   *
   *     1. FreeType looks for a bitmap for the glyph corresponding to the
   *        face's current size.  If one is found, the function returns.
   *        The bitmap data can be accessed from the glyph slot (see note
   *        below).
   *
   *     2. If no embedded bitmap is searched for or found, FreeType looks
   *        for a scalable outline.  If one is found, it is loaded from
   *        the font file, scaled to device pixels, then `hinted' to the
   *        pixel grid in order to optimize it.  The outline data can be
   *        accessed from the glyph slot (see note below).
   *
   *     Note that by default the glyph loader doesn't render outlines into
   *     bitmaps.  The following flags are used to modify this default
   *     behaviour to more specific and useful cases.
   *
   *   FT_LOAD_NO_SCALE ::
   *     Don't scale the loaded outline glyph but keep it in font units.
   *
   *     This flag implies @FT_LOAD_NO_HINTING and @FT_LOAD_NO_BITMAP, and
   *     unsets @FT_LOAD_RENDER.
   *
   *     If the font is `tricky' (see @FT_FACE_FLAG_TRICKY for more), using
   *     FT_LOAD_NO_SCALE usually yields meaningless outlines because the
   *     subglyphs must be scaled and positioned with hinting instructions.
   *     This can be solved by loading the font without FT_LOAD_NO_SCALE and
   *     setting the character size to `font->units_per_EM'.
   *
   *   FT_LOAD_NO_HINTING ::
   *     Disable hinting.  This generally generates `blurrier' bitmap glyphs
   *     when the glyph are rendered in any of the anti-aliased modes.  See
   *     also the note below.
   *
   *     This flag is implied by @FT_LOAD_NO_SCALE.
   *
   *   FT_LOAD_RENDER ::
   *     Call @FT_Render_Glyph after the glyph is loaded.  By default, the
   *     glyph is rendered in @FT_RENDER_MODE_NORMAL mode.  This can be
   *     overridden by @FT_LOAD_TARGET_XXX or @FT_LOAD_MONOCHROME.
   *
   *     This flag is unset by @FT_LOAD_NO_SCALE.
   *
   *   FT_LOAD_NO_BITMAP ::
   *     Ignore bitmap strikes when loading.  Bitmap-only fonts ignore this
   *     flag.
   *
   *     @FT_LOAD_NO_SCALE always sets this flag.
   *
   *   FT_LOAD_VERTICAL_LAYOUT ::
   *     Load the glyph for vertical text layout.  In particular, the
   *     `advance' value in the @FT_GlyphSlotRec structure is set to the
   *     `vertAdvance' value of the `metrics' field.
   *
   *     In case @FT_HAS_VERTICAL doesn't return true, you shouldn't use
   *     this flag currently.  Reason is that in this case vertical metrics
   *     get synthesized, and those values are not always consistent across
   *     various font formats.
   *
   *   FT_LOAD_FORCE_AUTOHINT ::
   *     Prefer the auto-hinter over the font's native hinter.  See also
   *     the note below.
   *
   *   FT_LOAD_PEDANTIC ::
   *     Make the font driver perform pedantic verifications during glyph
   *     loading.  This is mostly used to detect broken glyphs in fonts.
   *     By default, FreeType tries to handle broken fonts also.
   *
   *     In particular, errors from the TrueType bytecode engine are not
   *     passed to the application if this flag is not set; this might
   *     result in partially hinted or distorted glyphs in case a glyph's
   *     bytecode is buggy.
   *
   *   FT_LOAD_NO_RECURSE ::
   *     Don't load composite glyphs recursively.  Instead, the font
   *     driver should set the `num_subglyph' and `subglyphs' values of
   *     the glyph slot accordingly, and set `glyph->format' to
   *     @FT_GLYPH_FORMAT_COMPOSITE.  The description of subglyphs can
   *     then be accessed with @FT_Get_SubGlyph_Info.
   *
   *     This flag implies @FT_LOAD_NO_SCALE and @FT_LOAD_IGNORE_TRANSFORM.
   *
   *   FT_LOAD_IGNORE_TRANSFORM ::
   *     Ignore the transform matrix set by @FT_Set_Transform.
   *
   *   FT_LOAD_MONOCHROME ::
   *     This flag is used with @FT_LOAD_RENDER to indicate that you want to
   *     render an outline glyph to a 1-bit monochrome bitmap glyph, with
   *     8~pixels packed into each byte of the bitmap data.
   *
   *     Note that this has no effect on the hinting algorithm used.  You
   *     should rather use @FT_LOAD_TARGET_MONO so that the
   *     monochrome-optimized hinting algorithm is used.
   *
   *   FT_LOAD_LINEAR_DESIGN ::
   *     Keep  `linearHoriAdvance' and `linearVertAdvance' fields of
   *     @FT_GlyphSlotRec in font units.  See @FT_GlyphSlotRec for
   *     details.
   *
   *   FT_LOAD_NO_AUTOHINT ::
   *     Disable the auto-hinter.  See also the note below.
   *
   *   FT_LOAD_COLOR ::
   *     [Since 2.5] Load embedded color bitmap images.  The resulting color
   *     bitmaps, if available, will have the @FT_PIXEL_MODE_BGRA format.
   *     If the flag is not set and color bitmaps are found, they are
   *     converted to 256-level gray bitmaps transparently, using the
   *     @FT_PIXEL_MODE_GRAY format.
   *
   *   FT_LOAD_COMPUTE_METRICS ::
   *     [Since 2.6.1] Compute glyph metrics from the glyph data, without
   *     the use of bundled metrics tables (for example, the `hdmx' table in
   *     TrueType fonts).  This flag is mainly used by font validating or
   *     font editing applications, which need to ignore, verify, or edit
   *     those tables.
   *
   *     Currently, this flag is only implemented for TrueType fonts.
   *
   *   FT_LOAD_BITMAP_METRICS_ONLY ::
   *     [Since 2.7.1] Request loading of the metrics and bitmap image
   *     information of a (possibly embedded) bitmap glyph without
   *     allocating or copying the bitmap image data itself.  No effect if
   *     the target glyph is not a bitmap image.
   *
   *     This flag unsets @FT_LOAD_RENDER.
   *
   *   FT_LOAD_CROP_BITMAP ::
   *     Ignored.  Deprecated.
   *
   *   FT_LOAD_IGNORE_GLOBAL_ADVANCE_WIDTH ::
   *     Ignored.  Deprecated.
   *
   * @note:
   *   By default, hinting is enabled and the font's native hinter (see
   *   @FT_FACE_FLAG_HINTER) is preferred over the auto-hinter.  You can
   *   disable hinting by setting @FT_LOAD_NO_HINTING or change the
   *   precedence by setting @FT_LOAD_FORCE_AUTOHINT.  You can also set
   *   @FT_LOAD_NO_AUTOHINT in case you don't want the auto-hinter to be
   *   used at all.
   *
   *   See the description of @FT_FACE_FLAG_TRICKY for a special exception
   *   (affecting only a handful of Asian fonts).
   *
   *   Besides deciding which hinter to use, you can also decide which
   *   hinting algorithm to use.  See @FT_LOAD_TARGET_XXX for details.
   *
   *   Note that the auto-hinter needs a valid Unicode cmap (either a native
   *   one or synthesized by FreeType) for producing correct results.  If a
   *   font provides an incorrect mapping (for example, assigning the
   *   character code U+005A, LATIN CAPITAL LETTER Z, to a glyph depicting a
   *   mathematical integral sign), the auto-hinter might produce useless
   *   results.
   *
   */
#define FT_LOAD_DEFAULT                      0x0
#define FT_LOAD_NO_SCALE                     ( 1L << 0 )
#define FT_LOAD_NO_HINTING                   ( 1L << 1 )
#define FT_LOAD_RENDER                       ( 1L << 2 )
#define FT_LOAD_NO_BITMAP                    ( 1L << 3 )
#define FT_LOAD_VERTICAL_LAYOUT              ( 1L << 4 )
#define FT_LOAD_FORCE_AUTOHINT               ( 1L << 5 )
#define FT_LOAD_CROP_BITMAP                  ( 1L << 6 )
#define FT_LOAD_PEDANTIC                     ( 1L << 7 )
#define FT_LOAD_IGNORE_GLOBAL_ADVANCE_WIDTH  ( 1L << 9 )
#define FT_LOAD_NO_RECURSE                   ( 1L << 10 )
#define FT_LOAD_IGNORE_TRANSFORM             ( 1L << 11 )
#define FT_LOAD_MONOCHROME                   ( 1L << 12 )
#define FT_LOAD_LINEAR_DESIGN                ( 1L << 13 )
#define FT_LOAD_NO_AUTOHINT                  ( 1L << 15 )
  /* Bits 16-19 are used by `FT_LOAD_TARGET_' */
#define FT_LOAD_COLOR                        ( 1L << 20 )
#define FT_LOAD_COMPUTE_METRICS              ( 1L << 21 )
#define FT_LOAD_BITMAP_METRICS_ONLY          ( 1L << 22 )

/* */

/* used internally only by certain font drivers */
#define FT_LOAD_ADVANCE_ONLY                 ( 1L << 8 )
#define FT_LOAD_SBITS_ONLY                   ( 1L << 14 )

/**************************************************************************
   *
   * @enum:
   *   FT_LOAD_TARGET_XXX
   *
   * @description:
   *   A list of values to select a specific hinting algorithm for the
   *   hinter.  You should OR one of these values to your `load_flags'
   *   when calling @FT_Load_Glyph.
   *
   *   Note that a font's native hinters may ignore the hinting algorithm
   *   you have specified (e.g., the TrueType bytecode interpreter).  You
   *   can set @FT_LOAD_FORCE_AUTOHINT to ensure that the auto-hinter is
   *   used.
   *
   * @values:
   *   FT_LOAD_TARGET_NORMAL ::
   *     The default hinting algorithm, optimized for standard gray-level
   *     rendering.  For monochrome output, use @FT_LOAD_TARGET_MONO
   *     instead.
   *
   *   FT_LOAD_TARGET_LIGHT ::
   *     A lighter hinting algorithm for gray-level modes.  Many generated
   *     glyphs are fuzzier but better resemble their original shape.  This
   *     is achieved by snapping glyphs to the pixel grid only vertically
   *     (Y-axis), as is done by FreeType's new CFF engine or Microsoft's
   *     ClearType font renderer.  This preserves inter-glyph spacing in
   *     horizontal text.  The snapping is done either by the native font
   *     driver, if the driver itself and the font support it, or by the
   *     auto-hinter.
   *
   *     Advance widths are rounded to integer values; however, using the
   *     `lsb_delta' and `rsb_delta' fields of @FT_GlyphSlotRec, it is
   *     possible to get fractional advance widths for subpixel positioning
   *     (which is recommended to use).
   *
   *     If configuration option AF_CONFIG_OPTION_TT_SIZE_METRICS is active,
   *     TrueType-like metrics are used to make this mode behave similarly
   *     as in unpatched FreeType versions between 2.4.6 and 2.7.1
   *     (inclusive).
   *
   *   FT_LOAD_TARGET_MONO ::
   *     Strong hinting algorithm that should only be used for monochrome
   *     output.  The result is probably unpleasant if the glyph is rendered
   *     in non-monochrome modes.
   *
   *   FT_LOAD_TARGET_LCD ::
   *     A variant of @FT_LOAD_TARGET_LIGHT optimized for horizontally
   *     decimated LCD displays.
   *
   *   FT_LOAD_TARGET_LCD_V ::
   *     A variant of @FT_LOAD_TARGET_NORMAL optimized for vertically
   *     decimated LCD displays.
   *
   * @note:
   *   You should use only _one_ of the FT_LOAD_TARGET_XXX values in your
   *   `load_flags'.  They can't be ORed.
   *
   *   If @FT_LOAD_RENDER is also set, the glyph is rendered in the
   *   corresponding mode (i.e., the mode that matches the used algorithm
   *   best).  An exception is FT_LOAD_TARGET_MONO since it implies
   *   @FT_LOAD_MONOCHROME.
   *
   *   You can use a hinting algorithm that doesn't correspond to the same
   *   rendering mode.  As an example, it is possible to use the `light'
   *   hinting algorithm and have the results rendered in horizontal LCD
   *   pixel mode, with code like
   *
   *     {
   *       FT_Load_Glyph( face, glyph_index,
   *                      load_flags | FT_LOAD_TARGET_LIGHT );
   *
   *       FT_Render_Glyph( face->glyph, FT_RENDER_MODE_LCD );
   *     }
   *
   *   In general, you should stick with one rendering mode.  For example,
   *   switching between @FT_LOAD_TARGET_NORMAL and @FT_LOAD_TARGET_MONO
   *   enforces a lot of recomputation for TrueType fonts, which is slow.
   *   Another reason is caching: Selecting a different mode usually causes
   *   changes in both the outlines and the rasterized bitmaps; it is thus
   *   necessary to empty the cache after a mode switch to avoid false hits.
   *
   */
#define FT_LOAD_TARGET_( x )   ( (FT_Int32)( (x) & 15 ) << 16 )

#define FT_LOAD_TARGET_NORMAL  FT_LOAD_TARGET_( FT_RENDER_MODE_NORMAL )
#define FT_LOAD_TARGET_LIGHT   FT_LOAD_TARGET_( FT_RENDER_MODE_LIGHT  )
#define FT_LOAD_TARGET_MONO    FT_LOAD_TARGET_( FT_RENDER_MODE_MONO   )
#define FT_LOAD_TARGET_LCD     FT_LOAD_TARGET_( FT_RENDER_MODE_LCD    )
#define FT_LOAD_TARGET_LCD_V   FT_LOAD_TARGET_( FT_RENDER_MODE_LCD_V  )

/**************************************************************************
   *
   * @macro:
   *   FT_LOAD_TARGET_MODE
   *
   * @description:
   *   Return the @FT_Render_Mode corresponding to a given
   *   @FT_LOAD_TARGET_XXX value.
   *
   */
#define FT_LOAD_TARGET_MODE( x )  ( (FT_Render_Mode)( ( (x) >> 16 ) & 15 ) )

/*************************************************************************/
  /*                                                                       */
  /* <Function>                                                            */
  /*    FT_Set_Transform                                                   */
  /*                                                                       */
  /* <Description>                                                         */
  /*    Set the transformation that is applied to glyph images when they   */
  /*    are loaded into a glyph slot through @FT_Load_Glyph.               */
  /*                                                                       */
  /* <InOut>                                                               */
  /*    face   :: A handle to the source face object.                      */
  /*                                                                       */
  /* <Input>                                                               */
  /*    matrix :: A pointer to the transformation's 2x2 matrix.  Use NULL  */
  /*              for the identity matrix.                                 */
  /*    delta  :: A pointer to the translation vector.  Use NULL for the   */
  /*              null vector.                                             */
  /*                                                                       */
  /* <Note>                                                                */
  /*    The transformation is only applied to scalable image formats after */
  /*    the glyph has been loaded.  It means that hinting is unaltered by  */
  /*    the transformation and is performed on the character size given in */
  /*    the last call to @FT_Set_Char_Size or @FT_Set_Pixel_Sizes.         */
  /*                                                                       */
  /*    Note that this also transforms the `face.glyph.advance' field, but */
  /*    *not* the values in `face.glyph.metrics'.                          */
  /*                                                                       */
  FT_EXPORT( void )
  FT_Set_Transform( FT_Face     face,
                    FT_Matrix*  matrix,
                    FT_Vector*  delta );

/*************************************************************************/
  /*                                                                       */
  /* <Enum>                                                                */
  /*    FT_Render_Mode                                                     */
  /*                                                                       */
  /* <Description>                                                         */
  /*    Render modes supported by FreeType~2.  Each mode corresponds to a  */
  /*    specific type of scanline conversion performed on the outline.     */
  /*                                                                       */
  /*    For bitmap fonts and embedded bitmaps the `bitmap->pixel_mode'     */
  /*    field in the @FT_GlyphSlotRec structure gives the format of the    */
  /*    returned bitmap.                                                   */
  /*                                                                       */
  /*    All modes except @FT_RENDER_MODE_MONO use 256 levels of opacity,   */
  /*    indicating pixel coverage.  Use linear alpha blending and gamma    */
  /*    correction to correctly render non-monochrome glyph bitmaps onto a */
  /*    surface; see @FT_Render_Glyph.                                     */
  /*                                                                       */
  /* <Values>                                                              */
  /*    FT_RENDER_MODE_NORMAL ::                                           */
  /*      Default render mode; it corresponds to 8-bit anti-aliased        */
  /*      bitmaps.                                                         */
  /*                                                                       */
  /*    FT_RENDER_MODE_LIGHT ::                                            */
  /*      This is equivalent to @FT_RENDER_MODE_NORMAL.  It is only        */
  /*      defined as a separate value because render modes are also used   */
  /*      indirectly to define hinting algorithm selectors.  See           */
  /*      @FT_LOAD_TARGET_XXX for details.                                 */
  /*                                                                       */
  /*    FT_RENDER_MODE_MONO ::                                             */
  /*      This mode corresponds to 1-bit bitmaps (with 2~levels of         */
  /*      opacity).                                                        */
  /*                                                                       */
  /*    FT_RENDER_MODE_LCD ::                                              */
  /*      This mode corresponds to horizontal RGB and BGR subpixel         */
  /*      displays like LCD screens.  It produces 8-bit bitmaps that are   */
  /*      3~times the width of the original glyph outline in pixels, and   */
  /*      which use the @FT_PIXEL_MODE_LCD mode.                           */
  /*                                                                       */
  /*    FT_RENDER_MODE_LCD_V ::                                            */
  /*      This mode corresponds to vertical RGB and BGR subpixel displays  */
  /*      (like PDA screens, rotated LCD displays, etc.).  It produces     */
  /*      8-bit bitmaps that are 3~times the height of the original        */
  /*      glyph outline in pixels and use the @FT_PIXEL_MODE_LCD_V mode.   */
  /*                                                                       */
  /* <Note>                                                                */
  /*    Should you define FT_CONFIG_OPTION_SUBPIXEL_RENDERING in your      */
  /*    `ftoption.h', which enables patented ClearType-style rendering,    */
  /*    the LCD-optimized glyph bitmaps should be filtered to reduce color */
  /*    fringes inherent to this technology.  You can either set up LCD    */
  /*    filtering with @FT_Library_SetLcdFilter or @FT_Face_Properties,    */
  /*    or do the filtering yourself.  The default FreeType LCD rendering  */
  /*    technology does not require filtering.                             */
  /*                                                                       */
  /*    The selected render mode only affects vector glyphs of a font.     */
  /*    Embedded bitmaps often have a different pixel mode like            */
  /*    @FT_PIXEL_MODE_MONO.  You can use @FT_Bitmap_Convert to transform  */
  /*    them into 8-bit pixmaps.                                           */
  /*                                                                       */
  typedef enum  FT_Render_Mode_
  {
    FT_RENDER_MODE_NORMAL = 0,
    FT_RENDER_MODE_LIGHT,
    FT_RENDER_MODE_MONO,
    FT_RENDER_MODE_LCD,
    FT_RENDER_MODE_LCD_V,

FT_RENDER_MODE_MAX

} FT_Render_Mode;

/* these constants are deprecated; use the corresponding */
  /* `FT_Render_Mode' values instead                       */
#define ft_render_mode_normal  FT_RENDER_MODE_NORMAL
#define ft_render_mode_mono    FT_RENDER_MODE_MONO

/*************************************************************************/
  /*                                                                       */
  /* <Function>                                                            */
  /*    FT_Render_Glyph                                                    */
  /*                                                                       */
  /* <Description>                                                         */
  /*    Convert a given glyph image to a bitmap.  It does so by inspecting */
  /*    the glyph image format, finding the relevant renderer, and         */
  /*    invoking it.                                                       */
  /*                                                                       */
  /* <InOut>                                                               */
  /*    slot        :: A handle to the glyph slot containing the image to  */
  /*                   convert.                                            */
  /*                                                                       */
  /* <Input>                                                               */
  /*    render_mode :: The render mode used to render the glyph image into */
  /*                   a bitmap.  See @FT_Render_Mode for a list of        */
  /*                   possible values.                                    */
  /*                                                                       */
  /* <Return>                                                              */
  /*    FreeType error code.  0~means success.                             */
  /*                                                                       */
  /* <Note>                                                                */
  /*    To get meaningful results, font scaling values must be set with    */
  /*    functions like @FT_Set_Char_Size before calling `FT_Render_Glyph'. */
  /*                                                                       */
  /*    When FreeType outputs a bitmap of a glyph, it really outputs an    */
  /*    alpha coverage map.  If a pixel is completely covered by a         */
  /*    filled-in outline, the bitmap contains 0xFF at that pixel, meaning */
  /*    that 0xFF/0xFF fraction of that pixel is covered, meaning the      */
  /*    pixel is 100% black (or 0% bright).  If a pixel is only 50%        */
  /*    covered (value 0x80), the pixel is made 50% black (50% bright or a */
  /*    middle shade of grey).  0% covered means 0% black (100% bright or  */
  /*    white).                                                            */
  /*                                                                       */
  /*    On high-DPI screens like on smartphones and tablets, the pixels    */
  /*    are so small that their chance of being completely covered and     */
  /*    therefore completely black are fairly good.  On the low-DPI        */
  /*    screens, however, the situation is different.  The pixels are too  */
  /*    large for most of the details of a glyph and shades of gray are    */
  /*    the norm rather than the exception.                                */
  /*                                                                       */
  /*    This is relevant because all our screens have a second problem:    */
  /*    they are not linear.  1~+~1 is not~2.  Twice the value does not    */
  /*    result in twice the brightness.  When a pixel is only 50% covered, */
  /*    the coverage map says 50% black, and this translates to a pixel    */
  /*    value of 128 when you use 8~bits per channel (0-255).  However,    */
  /*    this does not translate to 50% brightness for that pixel on our    */
  /*    sRGB and gamma~2.2 screens.  Due to their non-linearity, they      */
  /*    dwell longer in the darks and only a pixel value of about 186      */
  /*    results in 50% brightness -- 128 ends up too dark on both bright   */
  /*    and dark backgrounds.  The net result is that dark text looks      */
  /*    burnt-out, pixely and blotchy on bright background, bright text    */
  /*    too frail on dark backgrounds, and colored text on colored         */
  /*    background (for example, red on green) seems to have dark halos or */
  /*    `dirt' around it.  The situation is especially ugly for diagonal   */
  /*    stems like in `w' glyph shapes where the quality of FreeType's     */
  /*    anti-aliasing depends on the correct display of grays.  On         */
  /*    high-DPI screens where smaller, fully black pixels reign supreme,  */
  /*    this doesn't matter, but on our low-DPI screens with all the gray  */
  /*    shades, it does.  0% and 100% brightness are the same things in    */
  /*    linear and non-linear space, just all the shades in-between        */
  /*    aren't.                                                            */
  /*                                                                       */
  /*    The blending function for placing text over a background is        */
  /*                                                                       */
  /*    {                                                                  */
  /*      dst = alpha * src + (1 - alpha) * dst    ,                       */
  /*    }                                                                  */
  /*                                                                       */
  /*    which is known as the OVER operator.                               */
  /*                                                                       */
  /*    To correctly composite an antialiased pixel of a glyph onto a      */
  /*    surface,                                                           */
  /*                                                                       */
  /*    1. take the foreground and background colors (e.g., in sRGB space) */
  /*       and apply gamma to get them in a linear space,                  */
  /*                                                                       */
  /*    2. use OVER to blend the two linear colors using the glyph pixel   */
  /*       as the alpha value (remember, the glyph bitmap is an alpha      */
  /*       coverage bitmap), and                                           */
  /*                                                                       */
  /*    3. apply inverse gamma to the blended pixel and write it back to   */
  /*       the image.                                                      */
  /*                                                                       */
  /*    Internal testing at Adobe found that a target inverse gamma of~1.8 */
  /*    for step~3 gives good results across a wide range of displays with */
  /*    an sRGB gamma curve or a similar one.                              */
  /*                                                                       */
  /*    This process can cost performance.  There is an approximation that */
  /*    does not need to know about the background color; see              */
  /*    https://bel.fi/alankila/lcd/ and                                   */
  /*    https://bel.fi/alankila/lcd/alpcor.html for details.               */
  /*                                                                       */
  /*    *ATTENTION*: Linear blending is even more important when dealing   */
  /*    with subpixel-rendered glyphs to prevent color-fringing!  A        */
  /*    subpixel-rendered glyph must first be filtered with a filter that  */
  /*    gives equal weight to the three color primaries and does not       */
  /*    exceed a sum of 0x100, see section @lcd_filtering.  Then the       */
  /*    only difference to gray linear blending is that subpixel-rendered  */
  /*    linear blending is done 3~times per pixel: red foreground subpixel */
  /*    to red background subpixel and so on for green and blue.           */
  /*                                                                       */
  FT_EXPORT( FT_Error )
  FT_Render_Glyph( FT_GlyphSlot    slot,
                   FT_Render_Mode  render_mode );

/*************************************************************************/
  /*                                                                       */
  /* <Enum>                                                                */
  /*    FT_Kerning_Mode                                                    */
  /*                                                                       */
  /* <Description>                                                         */
  /*    An enumeration to specify the format of kerning values returned by */
  /*    @FT_Get_Kerning.                                                   */
  /*                                                                       */
  /* <Values>                                                              */
  /*    FT_KERNING_DEFAULT  :: Return grid-fitted kerning distances in     */
  /*                           26.6 fractional pixels.                     */
  /*                                                                       */
  /*    FT_KERNING_UNFITTED :: Return un-grid-fitted kerning distances in  */
  /*                           26.6 fractional pixels.                     */
  /*                                                                       */
  /*    FT_KERNING_UNSCALED :: Return the kerning vector in original font  */
  /*                           units.                                      */
  /*                                                                       */
  /* <Note>                                                                */
  /*    FT_KERNING_DEFAULT returns full pixel values; it also makes        */
  /*    FreeType heuristically scale down kerning distances at small ppem  */
  /*    values so that they don't become too big.                          */
  /*                                                                       */
  /*    Both FT_KERNING_DEFAULT and FT_KERNING_UNFITTED use the current    */
  /*    horizontal scaling factor (as set e.g. with @FT_Set_Char_Size) to  */
  /*    convert font units to pixels.                                      */
  /*                                                                       */
  typedef enum  FT_Kerning_Mode_
  {
    FT_KERNING_DEFAULT = 0,
    FT_KERNING_UNFITTED,
    FT_KERNING_UNSCALED

} FT_Kerning_Mode;

/* these constants are deprecated; use the corresponding */
  /* `FT_Kerning_Mode' values instead                      */
#define ft_kerning_default   FT_KERNING_DEFAULT
#define ft_kerning_unfitted  FT_KERNING_UNFITTED
#define ft_kerning_unscaled  FT_KERNING_UNSCALED

/*************************************************************************/
  /*                                                                       */
  /* <Function>                                                            */
  /*    FT_Get_Kerning                                                     */
  /*                                                                       */
  /* <Description>                                                         */
  /*    Return the kerning vector between two glyphs of the same face.     */
  /*                                                                       */
  /* <Input>                                                               */
  /*    face        :: A handle to a source face object.                   */
  /*                                                                       */
  /*    left_glyph  :: The index of the left glyph in the kern pair.       */
  /*                                                                       */
  /*    right_glyph :: The index of the right glyph in the kern pair.      */
  /*                                                                       */
  /*    kern_mode   :: See @FT_Kerning_Mode for more information.          */
  /*                   Determines the scale and dimension of the returned  */
  /*                   kerning vector.                                     */
  /*                                                                       */
  /* <Output>                                                              */
  /*    akerning    :: The kerning vector.  This is either in font units,  */
  /*                   fractional pixels (26.6 format), or pixels for      */
  /*                   scalable formats, and in pixels for fixed-sizes     */
  /*                   formats.                                            */
  /*                                                                       */
  /* <Return>                                                              */
  /*    FreeType error code.  0~means success.                             */
  /*                                                                       */
  /* <Note>                                                                */
  /*    Only horizontal layouts (left-to-right & right-to-left) are        */
  /*    supported by this method.  Other layouts, or more sophisticated    */
  /*    kernings, are out of the scope of this API function -- they can be */
  /*    implemented through format-specific interfaces.                    */
  /*                                                                       */
  /*    Kerning for OpenType fonts implemented in a `GPOS' table is not    */
  /*    supported; use @FT_HAS_KERNING to find out whether a font has data */
  /*    that can be extracted with `FT_Get_Kerning'.                       */
  /*                                                                       */
  FT_EXPORT( FT_Error )
  FT_Get_Kerning( FT_Face     face,
                  FT_UInt     left_glyph,
                  FT_UInt     right_glyph,
                  FT_UInt     kern_mode,
                  FT_Vector  *akerning );

/*************************************************************************/
  /*                                                                       */
  /* <Function>                                                            */
  /*    FT_Get_Track_Kerning                                               */
  /*                                                                       */
  /* <Description>                                                         */
  /*    Return the track kerning for a given face object at a given size.  */
  /*                                                                       */
  /* <Input>                                                               */
  /*    face       :: A handle to a source face object.                    */
  /*                                                                       */
  /*    point_size :: The point size in 16.16 fractional points.           */
  /*                                                                       */
  /*    degree     :: The degree of tightness.  Increasingly negative      */
  /*                  values represent tighter track kerning, while        */
  /*                  increasingly positive values represent looser track  */
  /*                  kerning.  Value zero means no track kerning.         */
  /*                                                                       */
  /* <Output>                                                              */
  /*    akerning   :: The kerning in 16.16 fractional points, to be        */
  /*                  uniformly applied between all glyphs.                */
  /*                                                                       */
  /* <Return>                                                              */
  /*    FreeType error code.  0~means success.                             */
  /*                                                                       */
  /* <Note>                                                                */
  /*    Currently, only the Type~1 font driver supports track kerning,     */
  /*    using data from AFM files (if attached with @FT_Attach_File or     */
  /*    @FT_Attach_Stream).                                                */
  /*                                                                       */
  /*    Only very few AFM files come with track kerning data; please refer */
  /*    to Adobe's AFM specification for more details.                     */
  /*                                                                       */
  FT_EXPORT( FT_Error )
  FT_Get_Track_Kerning( FT_Face    face,
                        FT_Fixed   point_size,
                        FT_Int     degree,
                        FT_Fixed*  akerning );

/*************************************************************************/
  /*                                                                       */
  /* <Function>                                                            */
  /*    FT_Get_Glyph_Name                                                  */
  /*                                                                       */
  /* <Description>                                                         */
  /*    Retrieve the ASCII name of a given glyph in a face.  This only     */
  /*    works for those faces where @FT_HAS_GLYPH_NAMES(face) returns~1.   */
  /*                                                                       */
  /* <Input>                                                               */
  /*    face        :: A handle to a source face object.                   */
  /*                                                                       */
  /*    glyph_index :: The glyph index.                                    */
  /*                                                                       */
  /*    buffer_max  :: The maximum number of bytes available in the        */
  /*                   buffer.                                             */
  /*                                                                       */
  /* <Output>                                                              */
  /*    buffer      :: A pointer to a target buffer where the name is      */
  /*                   copied to.                                          */
  /*                                                                       */
  /* <Return>                                                              */
  /*    FreeType error code.  0~means success.                             */
  /*                                                                       */
  /* <Note>                                                                */
  /*    An error is returned if the face doesn't provide glyph names or if */
  /*    the glyph index is invalid.  In all cases of failure, the first    */
  /*    byte of `buffer' is set to~0 to indicate an empty name.            */
  /*                                                                       */
  /*    The glyph name is truncated to fit within the buffer if it is too  */
  /*    long.  The returned string is always zero-terminated.              */
  /*                                                                       */
  /*    Be aware that FreeType reorders glyph indices internally so that   */
  /*    glyph index~0 always corresponds to the `missing glyph' (called    */
  /*    `.notdef').                                                        */
  /*                                                                       */
  /*    This function always returns an error if the config macro          */
  /*    `FT_CONFIG_OPTION_NO_GLYPH_NAMES' is not defined in `ftoption.h'.  */
  /*                                                                       */
  FT_EXPORT( FT_Error )
  FT_Get_Glyph_Name( FT_Face     face,
                     FT_UInt     glyph_index,
                     FT_Pointer  buffer,
                     FT_UInt     buffer_max );

/*************************************************************************/
  /*                                                                       */
  /* <Function>                                                            */
  /*    FT_Get_Postscript_Name                                             */
  /*                                                                       */
  /* <Description>                                                         */
  /*    Retrieve the ASCII PostScript name of a given face, if available.  */
  /*    This only works with PostScript, TrueType, and OpenType fonts.     */
  /*                                                                       */
  /* <Input>                                                               */
  /*    face :: A handle to the source face object.                        */
  /*                                                                       */
  /* <Return>                                                              */
  /*    A pointer to the face's PostScript name.  NULL if unavailable.     */
  /*                                                                       */
  /* <Note>                                                                */
  /*    The returned pointer is owned by the face and is destroyed with    */
  /*    it.                                                                */
  /*                                                                       */
  /*    For variation fonts, this string changes if you select a different */
  /*    instance, and you have to call `FT_Get_PostScript_Name' again to   */
  /*    retrieve it.  FreeType follows Adobe TechNote #5902, `Generating   */
  /*    PostScript Names for Fonts Using OpenType Font Variations'.        */
  /*                                                                       */
  /*      https://download.macromedia.com/pub/developer/opentype/tech-notes/5902.AdobePSNameGeneration.html */
  /*                                                                       */
  /*    [Since 2.9] Special PostScript names for named instances are only  */
  /*    returned if the named instance is set with @FT_Set_Named_Instance  */
  /*    (and the font has corresponding entries in its `fvar' table).  If  */
  /*    @FT_IS_VARIATION returns true, the algorithmically derived         */
  /*    PostScript name is provided, not looking up special entries for    */
  /*    named instances.                                                   */
  /*                                                                       */
  FT_EXPORT( const char* )
  FT_Get_Postscript_Name( FT_Face  face );

/*************************************************************************/
  /*                                                                       */
  /* <Function>                                                            */
  /*    FT_Select_Charmap                                                  */
  /*                                                                       */
  /* <Description>                                                         */
  /*    Select a given charmap by its encoding tag (as listed in           */
  /*    `freetype.h').                                                     */
  /*                                                                       */
  /* <InOut>                                                               */
  /*    face     :: A handle to the source face object.                    */
  /*                                                                       */
  /* <Input>                                                               */
  /*    encoding :: A handle to the selected encoding.                     */
  /*                                                                       */
  /* <Return>                                                              */
  /*    FreeType error code.  0~means success.                             */
  /*                                                                       */
  /* <Note>                                                                */
  /*    This function returns an error if no charmap in the face           */
  /*    corresponds to the encoding queried here.                          */
  /*                                                                       */
  /*    Because many fonts contain more than a single cmap for Unicode     */
  /*    encoding, this function has some special code to select the one    */
  /*    that covers Unicode best (`best' in the sense that a UCS-4 cmap is */
  /*    preferred to a UCS-2 cmap).  It is thus preferable to              */
  /*    @FT_Set_Charmap in this case.                                      */
  /*                                                                       */
  FT_EXPORT( FT_Error )
  FT_Select_Charmap( FT_Face      face,
                     FT_Encoding  encoding );

/*************************************************************************/
  /*                                                                       */
  /* <Function>                                                            */
  /*    FT_Set_Charmap                                                     */
  /*                                                                       */
  /* <Description>                                                         */
  /*    Select a given charmap for character code to glyph index mapping.  */
  /*                                                                       */
  /* <InOut>                                                               */
  /*    face    :: A handle to the source face object.                     */
  /*                                                                       */
  /* <Input>                                                               */
  /*    charmap :: A handle to the selected charmap.                       */
  /*                                                                       */
  /* <Return>                                                              */
  /*    FreeType error code.  0~means success.                             */
  /*                                                                       */
  /* <Note>                                                                */
  /*    This function returns an error if the charmap is not part of       */
  /*    the face (i.e., if it is not listed in the `face->charmaps'        */
  /*    table).                                                            */
  /*                                                                       */
  /*    It also fails if an OpenType type~14 charmap is selected (which    */
  /*    doesn't map character codes to glyph indices at all).              */
  /*                                                                       */
  FT_EXPORT( FT_Error )
  FT_Set_Charmap( FT_Face     face,
                  FT_CharMap  charmap );

/*************************************************************************
   *
   * @function:
   *   FT_Get_Charmap_Index
   *
   * @description:
   *   Retrieve index of a given charmap.
   *
   * @input:
   *   charmap ::
   *     A handle to a charmap.
   *
   * @return:
   *   The index into the array of character maps within the face to which
   *   `charmap' belongs.  If an error occurs, -1 is returned.
   *
   */
  FT_EXPORT( FT_Int )
  FT_Get_Charmap_Index( FT_CharMap  charmap );

/*************************************************************************/
  /*                                                                       */
  /* <Function>                                                            */
  /*    FT_Get_Char_Index                                                  */
  /*                                                                       */
  /* <Description>                                                         */
  /*    Return the glyph index of a given character code.  This function   */
  /*    uses the currently selected charmap to do the mapping.             */
  /*                                                                       */
  /* <Input>                                                               */
  /*    face     :: A handle to the source face object.                    */
  /*                                                                       */
  /*    charcode :: The character code.                                    */
  /*                                                                       */
  /* <Return>                                                              */
  /*    The glyph index.  0~means `undefined character code'.              */
  /*                                                                       */
  /* <Note>                                                                */
  /*    If you use FreeType to manipulate the contents of font files       */
  /*    directly, be aware that the glyph index returned by this function  */
  /*    doesn't always correspond to the internal indices used within the  */
  /*    file.  This is done to ensure that value~0 always corresponds to   */
  /*    the `missing glyph'.  If the first glyph is not named `.notdef',   */
  /*    then for Type~1 and Type~42 fonts, `.notdef' will be moved into    */
  /*    the glyph ID~0 position, and whatever was there will be moved to   */
  /*    the position `.notdef' had.  For Type~1 fonts, if there is no      */
  /*    `.notdef' glyph at all, then one will be created at index~0 and    */
  /*    whatever was there will be moved to the last index -- Type~42      */
  /*    fonts are considered invalid under this condition.                 */
  /*                                                                       */
  FT_EXPORT( FT_UInt )
  FT_Get_Char_Index( FT_Face   face,
                     FT_ULong  charcode );

/*************************************************************************/
  /*                                                                       */
  /* <Function>                                                            */
  /*    FT_Get_First_Char                                                  */
  /*                                                                       */
  /* <Description>                                                         */
  /*    Return the first character code in the current charmap of a given  */
  /*    face, together with its corresponding glyph index.                 */
  /*                                                                       */
  /* <Input>                                                               */
  /*    face    :: A handle to the source face object.                     */
  /*                                                                       */
  /* <Output>                                                              */
  /*    agindex :: Glyph index of first character code.  0~if charmap is   */
  /*               empty.                                                  */
  /*                                                                       */
  /* <Return>                                                              */
  /*    The charmap's first character code.                                */
  /*                                                                       */
  /* <Note>                                                                */
  /*    You should use this function together with @FT_Get_Next_Char to    */
  /*    parse all character codes available in a given charmap.  The code  */
  /*    should look like this:                                             */
  /*                                                                       */
  /*    {                                                                  */
  /*      FT_ULong  charcode;                                              */
  /*      FT_UInt   gindex;                                                */
  /*                                                                       */
  /*                                                                       */
  /*      charcode = FT_Get_First_Char( face, &gindex );                   */
  /*      while ( gindex != 0 )                                            */
  /*      {                                                                */
  /*        ... do something with (charcode,gindex) pair ...               */
  /*                                                                       */
  /*        charcode = FT_Get_Next_Char( face, charcode, &gindex );        */
  /*      }                                                                */
  /*    }                                                                  */
  /*                                                                       */
  /*    Be aware that character codes can have values up to 0xFFFFFFFF;    */
  /*    this might happen for non-Unicode or malformed cmaps.  However,    */
  /*    even with regular Unicode encoding, so-called `last resort fonts'  */
  /*    (using SFNT cmap format 13, see function @FT_Get_CMap_Format)      */
  /*    normally have entries for all Unicode characters up to 0x1FFFFF,   */
  /*    which can cause *a lot* of iterations.                             */
  /*                                                                       */
  /*    Note that `*agindex' is set to~0 if the charmap is empty.  The     */
  /*    result itself can be~0 in two cases: if the charmap is empty or    */
  /*    if the value~0 is the first valid character code.                  */
  /*                                                                       */
  FT_EXPORT( FT_ULong )
  FT_Get_First_Char( FT_Face   face,
                     FT_UInt  *agindex );

/*************************************************************************/
  /*                                                                       */
  /* <Function>                                                            */
  /*    FT_Get_Next_Char                                                   */
  /*                                                                       */
  /* <Description>                                                         */
  /*    Return the next character code in the current charmap of a given   */
  /*    face following the value `char_code', as well as the corresponding */
  /*    glyph index.                                                       */
  /*                                                                       */
  /* <Input>                                                               */
  /*    face      :: A handle to the source face object.                   */
  /*                                                                       */
  /*    char_code :: The starting character code.                          */
  /*                                                                       */
  /* <Output>                                                              */
  /*    agindex   :: Glyph index of next character code.  0~if charmap     */
  /*                 is empty.                                             */
  /*                                                                       */
  /* <Return>                                                              */
  /*    The charmap's next character code.                                 */
  /*                                                                       */
  /* <Note>                                                                */
  /*    You should use this function with @FT_Get_First_Char to walk       */
  /*    over all character codes available in a given charmap.  See the    */
  /*    note for that function for a simple code example.                  */
  /*                                                                       */
  /*    Note that `*agindex' is set to~0 when there are no more codes in   */
  /*    the charmap.                                                       */
  /*                                                                       */
  FT_EXPORT( FT_ULong )
  FT_Get_Next_Char( FT_Face    face,
                    FT_ULong   char_code,
                    FT_UInt   *agindex );

/*************************************************************************
   *
   * @function:
   *   FT_Face_Properties
   *
   * @description:
   *   Set or override certain (library or module-wide) properties on a
   *   face-by-face basis.  Useful for finer-grained control and avoiding
   *   locks on shared structures (threads can modify their own faces as
   *   they see fit).
   *
   *   Contrary to @FT_Property_Set, this function uses @FT_Parameter so
   *   that you can pass multiple properties to the target face in one call.
   *   Note that only a subset of the available properties can be
   *   controlled.
   *
   *   * @FT_PARAM_TAG_STEM_DARKENING (stem darkening, corresponding to the
   *     property `no-stem-darkening' provided by the `autofit', `cff',
   *     `type1', and `t1cid' modules; see @no-stem-darkening).
   *
   *   * @FT_PARAM_TAG_LCD_FILTER_WEIGHTS (LCD filter weights, corresponding
   *     to function @FT_Library_SetLcdFilterWeights).
   *
   *   * @FT_PARAM_TAG_RANDOM_SEED (seed value for the CFF, Type~1, and CID
   *     `random' operator, corresponding to the `random-seed' property
   *     provided by the `cff', `type1', and `t1cid' modules; see
   *     @random-seed).
   *
   *   Pass NULL as `data' in @FT_Parameter for a given tag to reset the
   *   option and use the library or module default again.
   *
   * @input:
   *   face ::
   *     A handle to the source face object.
   *
   *   num_properties ::
   *     The number of properties that follow.
   *
   *   properties ::
   *     A handle to an @FT_Parameter array with `num_properties' elements.
   *
   * @return:
   *   FreeType error code.  0~means success.
   *
   * @note:
   *   Here an example that sets three properties.  You must define
   *   FT_CONFIG_OPTION_SUBPIXEL_RENDERING to make the LCD filter examples
   *   work.
   *
   *   {
   *     FT_Parameter         property1;
   *     FT_Bool              darken_stems = 1;
   *
   *     FT_Parameter         property2;
   *     FT_LcdFiveTapFilter  custom_weight =
   *                            { 0x11, 0x44, 0x56, 0x44, 0x11 };
   *
   *     FT_Parameter         property3;
   *     FT_Int32             random_seed = 314159265;
   *
   *     FT_Parameter         properties[3] = { property1,
   *                                            property2,
   *                                            property3 };
   *
   *
   *     property1.tag  = FT_PARAM_TAG_STEM_DARKENING;
   *     property1.data = &darken_stems;
   *
   *     property2.tag  = FT_PARAM_TAG_LCD_FILTER_WEIGHTS;
   *     property2.data = custom_weight;
   *
   *     property3.tag  = FT_PARAM_TAG_RANDOM_SEED;
   *     property3.data = &random_seed;
   *
   *     FT_Face_Properties( face, 3, properties );
   *   }
   *
   *   The next example resets a single property to its default value.
   *
   *   {
   *     FT_Parameter  property;
   *
   *
   *     property.tag  = FT_PARAM_TAG_LCD_FILTER_WEIGHTS;
   *     property.data = NULL;
   *
   *     FT_Face_Properties( face, 1, &property );
   *   }
   *
   * @since:
   *   2.8
   *
   */
  FT_EXPORT( FT_Error )
  FT_Face_Properties( FT_Face        face,
                      FT_UInt        num_properties,
                      FT_Parameter*  properties );

/*************************************************************************/
  /*                                                                       */
  /* <Function>                                                            */
  /*    FT_Get_Name_Index                                                  */
  /*                                                                       */
  /* <Description>                                                         */
  /*    Return the glyph index of a given glyph name.                      */
  /*                                                                       */
  /* <Input>                                                               */
  /*    face       :: A handle to the source face object.                  */
  /*                                                                       */
  /*    glyph_name :: The glyph name.                                      */
  /*                                                                       */
  /* <Return>                                                              */
  /*    The glyph index.  0~means `undefined character code'.              */
  /*                                                                       */
  FT_EXPORT( FT_UInt )
  FT_Get_Name_Index( FT_Face     face,
                     FT_String*  glyph_name );

/*************************************************************************
   *
   * @macro:
   *   FT_SUBGLYPH_FLAG_XXX
   *
   * @description:
   *   A list of constants describing subglyphs.  Please refer to the
   *   `glyf' table description in the OpenType specification for the
   *   meaning of the various flags (which get synthesized for
   *   non-OpenType subglyphs).
   *
   * @values:
   *   FT_SUBGLYPH_FLAG_ARGS_ARE_WORDS ::
   *   FT_SUBGLYPH_FLAG_ARGS_ARE_XY_VALUES ::
   *   FT_SUBGLYPH_FLAG_ROUND_XY_TO_GRID ::
   *   FT_SUBGLYPH_FLAG_SCALE ::
   *   FT_SUBGLYPH_FLAG_XY_SCALE ::
   *   FT_SUBGLYPH_FLAG_2X2 ::
   *   FT_SUBGLYPH_FLAG_USE_MY_METRICS ::
   *
   */
#define FT_SUBGLYPH_FLAG_ARGS_ARE_WORDS          1
#define FT_SUBGLYPH_FLAG_ARGS_ARE_XY_VALUES      2
#define FT_SUBGLYPH_FLAG_ROUND_XY_TO_GRID        4
#define FT_SUBGLYPH_FLAG_SCALE                   8
#define FT_SUBGLYPH_FLAG_XY_SCALE             0x40
#define FT_SUBGLYPH_FLAG_2X2                  0x80
#define FT_SUBGLYPH_FLAG_USE_MY_METRICS      0x200

/*************************************************************************
   *
   * @func:
   *   FT_Get_SubGlyph_Info
   *
   * @description:
   *   Retrieve a description of a given subglyph.  Only use it if
   *   `glyph->format' is @FT_GLYPH_FORMAT_COMPOSITE; an error is
   *   returned otherwise.
   *
   * @input:
   *   glyph ::
   *     The source glyph slot.
   *
   *   sub_index ::
   *     The index of the subglyph.  Must be less than
   *     `glyph->num_subglyphs'.
   *
   * @output:
   *   p_index ::
   *     The glyph index of the subglyph.
   *
   *   p_flags ::
   *     The subglyph flags, see @FT_SUBGLYPH_FLAG_XXX.
   *
   *   p_arg1 ::
   *     The subglyph's first argument (if any).
   *
   *   p_arg2 ::
   *     The subglyph's second argument (if any).
   *
   *   p_transform ::
   *     The subglyph transformation (if any).
   *
   * @return:
   *   FreeType error code.  0~means success.
   *
   * @note:
   *   The values of `*p_arg1', `*p_arg2', and `*p_transform' must be
   *   interpreted depending on the flags returned in `*p_flags'.  See the
   *   OpenType specification for details.
   *
   */
  FT_EXPORT( FT_Error )
  FT_Get_SubGlyph_Info( FT_GlyphSlot  glyph,
                        FT_UInt       sub_index,
                        FT_Int       *p_index,
                        FT_UInt      *p_flags,
                        FT_Int       *p_arg1,
                        FT_Int       *p_arg2,
                        FT_Matrix    *p_transform );

/*************************************************************************/
  /*                                                                       */
  /* <Enum>                                                                */
  /*    FT_FSTYPE_XXX                                                      */
  /*                                                                       */
  /* <Description>                                                         */
  /*    A list of bit flags used in the `fsType' field of the OS/2 table   */
  /*    in a TrueType or OpenType font and the `FSType' entry in a         */
  /*    PostScript font.  These bit flags are returned by                  */
  /*    @FT_Get_FSType_Flags; they inform client applications of embedding */
  /*    and subsetting restrictions associated with a font.                */
  /*                                                                       */
  /*    See                                                                */
  /*    https://www.adobe.com/content/dam/Adobe/en/devnet/acrobat/pdfs/FontPolicies.pdf */
  /*    for more details.                                                  */
  /*                                                                       */
  /* <Values>                                                              */
  /*    FT_FSTYPE_INSTALLABLE_EMBEDDING ::                                 */
  /*      Fonts with no fsType bit set may be embedded and permanently     */
  /*      installed on the remote system by an application.                */
  /*                                                                       */
  /*    FT_FSTYPE_RESTRICTED_LICENSE_EMBEDDING ::                          */
  /*      Fonts that have only this bit set must not be modified, embedded */
  /*      or exchanged in any manner without first obtaining permission of */
  /*      the font software copyright owner.                               */
  /*                                                                       */
  /*    FT_FSTYPE_PREVIEW_AND_PRINT_EMBEDDING ::                           */
  /*      The font may be embedded and temporarily loaded on the remote    */
  /*      system.  Documents containing Preview & Print fonts must be      */
  /*      opened `read-only'; no edits can be applied to the document.     */
  /*                                                                       */
  /*    FT_FSTYPE_EDITABLE_EMBEDDING ::                                    */
  /*      The font may be embedded but must only be installed temporarily  */
  /*      on other systems.  In contrast to Preview & Print fonts,         */
  /*      documents containing editable fonts may be opened for reading,   */
  /*      editing is permitted, and changes may be saved.                  */
  /*                                                                       */
  /*    FT_FSTYPE_NO_SUBSETTING ::                                         */
  /*      The font may not be subsetted prior to embedding.                */
  /*                                                                       */
  /*    FT_FSTYPE_BITMAP_EMBEDDING_ONLY ::                                 */
  /*      Only bitmaps contained in the font may be embedded; no outline   */
  /*      data may be embedded.  If there are no bitmaps available in the  */
  /*      font, then the font is unembeddable.                             */
  /*                                                                       */
  /* <Note>                                                                */
  /*    The flags are ORed together, thus more than a single value can be  */
  /*    returned.                                                          */
  /*                                                                       */
  /*    While the `fsType' flags can indicate that a font may be embedded, */
  /*    a license with the font vendor may be separately required to use   */
  /*    the font in this way.                                              */
  /*                                                                       */
#define FT_FSTYPE_INSTALLABLE_EMBEDDING         0x0000
#define FT_FSTYPE_RESTRICTED_LICENSE_EMBEDDING  0x0002
#define FT_FSTYPE_PREVIEW_AND_PRINT_EMBEDDING   0x0004
#define FT_FSTYPE_EDITABLE_EMBEDDING            0x0008
#define FT_FSTYPE_NO_SUBSETTING                 0x0100
#define FT_FSTYPE_BITMAP_EMBEDDING_ONLY         0x0200

/*************************************************************************/
  /*                                                                       */
  /* <Function>                                                            */
  /*    FT_Get_FSType_Flags                                                */
  /*                                                                       */
  /* <Description>                                                         */
  /*    Return the `fsType' flags for a font.                              */
  /*                                                                       */
  /* <Input>                                                               */
  /*    face :: A handle to the source face object.                        */
  /*                                                                       */
  /* <Return>                                                              */
  /*    The `fsType' flags, see @FT_FSTYPE_XXX.                            */
  /*                                                                       */
  /* <Note>                                                                */
  /*    Use this function rather than directly reading the `fs_type' field */
  /*    in the @PS_FontInfoRec structure, which is only guaranteed to      */
  /*    return the correct results for Type~1 fonts.                       */
  /*                                                                       */
  /* <Since>                                                               */
  /*    2.3.8                                                              */
  /*                                                                       */
  FT_EXPORT( FT_UShort )
  FT_Get_FSType_Flags( FT_Face  face );

/*************************************************************************/
  /*                                                                       */
  /* <Section>                                                             */
  /*    glyph_variants                                                     */
  /*                                                                       */
  /* <Title>                                                               */
  /*    Unicode Variation Sequences                                        */
  /*                                                                       */
  /* <Abstract>                                                            */
  /*    The FreeType~2 interface to Unicode Variation Sequences (UVS),     */
  /*    using the SFNT cmap format~14.                                     */
  /*                                                                       */
  /* <Description>                                                         */
  /*    Many characters, especially for CJK scripts, have variant forms.   */
  /*    They are a sort of grey area somewhere between being totally       */
  /*    irrelevant and semantically distinct; for this reason, the Unicode */
  /*    consortium decided to introduce Variation Sequences (VS),          */
  /*    consisting of a Unicode base character and a variation selector    */
  /*    instead of further extending the already huge number of            */
  /*    characters.                                                        */
  /*                                                                       */
  /*    Unicode maintains two different sets, namely `Standardized         */
  /*    Variation Sequences' and registered `Ideographic Variation         */
  /*    Sequences' (IVS), collected in the `Ideographic Variation          */
  /*    Database' (IVD).                                                   */
  /*                                                                       */
  /*      https://unicode.org/Public/UCD/latest/ucd/StandardizedVariants.txt */
  /*      https://unicode.org/reports/tr37/                                */
  /*      https://unicode.org/ivd/                                         */
  /*                                                                       */
  /*    To date (January 2017), the character with the most ideographic    */
  /*    variations is U+9089, having 32 such IVS.                          */
  /*                                                                       */
  /*    Three Mongolian Variation Selectors have the values U+180B-U+180D; */
  /*    256 generic Variation Selectors are encoded in the ranges          */
  /*    U+FE00-U+FE0F and U+E0100-U+E01EF.  IVS currently use Variation    */
  /*    Selectors from the range U+E0100-U+E01EF only.                     */
  /*                                                                       */
  /*    A VS consists of the base character value followed by a single     */
  /*    Variation Selector.  For example, to get the first variation of    */
  /*    U+9089, you have to write the character sequence `U+9089 U+E0100'. */
  /*                                                                       */
  /*    Adobe and MS decided to support both standardized and ideographic  */
  /*    VS with a new cmap subtable (format~14).  It is an odd subtable    */
  /*    because it is not a mapping of input code points to glyphs, but    */
  /*    contains lists of all variations supported by the font.            */
  /*                                                                       */
  /*    A variation may be either `default' or `non-default' for a given   */
  /*    font.  A default variation is the one you will get for that code   */
  /*    point if you look it up in the standard Unicode cmap.  A           */
  /*    non-default variation is a different glyph.                        */
  /*                                                                       */
  /*************************************************************************/

/*************************************************************************/
  /*                                                                       */
  /* <Function>                                                            */
  /*    FT_Face_GetCharVariantIndex                                        */
  /*                                                                       */
  /* <Description>                                                         */
  /*    Return the glyph index of a given character code as modified by    */
  /*    the variation selector.                                            */
  /*                                                                       */
  /* <Input>                                                               */
  /*    face ::                                                            */
  /*      A handle to the source face object.                              */
  /*                                                                       */
  /*    charcode ::                                                        */
  /*      The character code point in Unicode.                             */
  /*                                                                       */
  /*    variantSelector ::                                                 */
  /*      The Unicode code point of the variation selector.                */
  /*                                                                       */
  /* <Return>                                                              */
  /*    The glyph index.  0~means either `undefined character code', or    */
  /*    `undefined selector code', or `no variation selector cmap          */
  /*    subtable', or `current CharMap is not Unicode'.                    */
  /*                                                                       */
  /* <Note>                                                                */
  /*    If you use FreeType to manipulate the contents of font files       */
  /*    directly, be aware that the glyph index returned by this function  */
  /*    doesn't always correspond to the internal indices used within      */
  /*    the file.  This is done to ensure that value~0 always corresponds  */
  /*    to the `missing glyph'.                                            */
  /*                                                                       */
  /*    This function is only meaningful if                                */
  /*      a) the font has a variation selector cmap sub table,             */
  /*    and                                                                */
  /*      b) the current charmap has a Unicode encoding.                   */
  /*                                                                       */
  /* <Since>                                                               */
  /*    2.3.6                                                              */
  /*                                                                       */
  FT_EXPORT( FT_UInt )
  FT_Face_GetCharVariantIndex( FT_Face   face,
                               FT_ULong  charcode,
                               FT_ULong  variantSelector );

/*************************************************************************/
  /*                                                                       */
  /* <Function>                                                            */
  /*    FT_Face_GetCharVariantIsDefault                                    */
  /*                                                                       */
  /* <Description>                                                         */
  /*    Check whether this variation of this Unicode character is the one  */
  /*    to be found in the `cmap'.                                         */
  /*                                                                       */
  /* <Input>                                                               */
  /*    face ::                                                            */
  /*      A handle to the source face object.                              */
  /*                                                                       */
  /*    charcode ::                                                        */
  /*      The character codepoint in Unicode.                              */
  /*                                                                       */
  /*    variantSelector ::                                                 */
  /*      The Unicode codepoint of the variation selector.                 */
  /*                                                                       */
  /* <Return>                                                              */
  /*    1~if found in the standard (Unicode) cmap, 0~if found in the       */
  /*    variation selector cmap, or -1 if it is not a variation.           */
  /*                                                                       */
  /* <Note>                                                                */
  /*    This function is only meaningful if the font has a variation       */
  /*    selector cmap subtable.                                            */
  /*                                                                       */
  /* <Since>                                                               */
  /*    2.3.6                                                              */
  /*                                                                       */
  FT_EXPORT( FT_Int )
  FT_Face_GetCharVariantIsDefault( FT_Face   face,
                                   FT_ULong  charcode,
                                   FT_ULong  variantSelector );

/*************************************************************************/
  /*                                                                       */
  /* <Function>                                                            */
  /*    FT_Face_GetVariantSelectors                                        */
  /*                                                                       */
  /* <Description>                                                         */
  /*    Return a zero-terminated list of Unicode variation selectors found */
  /*    in the font.                                                       */
  /*                                                                       */
  /* <Input>                                                               */
  /*    face ::                                                            */
  /*      A handle to the source face object.                              */
  /*                                                                       */
  /* <Return>                                                              */
  /*    A pointer to an array of selector code points, or NULL if there is */
  /*    no valid variation selector cmap subtable.                         */
  /*                                                                       */
  /* <Note>                                                                */
  /*    The last item in the array is~0; the array is owned by the         */
  /*    @FT_Face object but can be overwritten or released on the next     */
  /*    call to a FreeType function.                                       */
  /*                                                                       */
  /* <Since>                                                               */
  /*    2.3.6                                                              */
  /*                                                                       */
  FT_EXPORT( FT_UInt32* )
  FT_Face_GetVariantSelectors( FT_Face  face );

/*************************************************************************/
  /*                                                                       */
  /* <Function>                                                            */
  /*    FT_Face_GetVariantsOfChar                                          */
  /*                                                                       */
  /* <Description>                                                         */
  /*    Return a zero-terminated list of Unicode variation selectors found */
  /*    for the specified character code.                                  */
  /*                                                                       */
  /* <Input>                                                               */
  /*    face ::                                                            */
  /*      A handle to the source face object.                              */
  /*                                                                       */
  /*    charcode ::                                                        */
  /*      The character codepoint in Unicode.                              */
  /*                                                                       */
  /* <Return>                                                              */
  /*    A pointer to an array of variation selector code points that are   */
  /*    active for the given character, or NULL if the corresponding list  */
  /*    is empty.                                                          */
  /*                                                                       */
  /* <Note>                                                                */
  /*    The last item in the array is~0; the array is owned by the         */
  /*    @FT_Face object but can be overwritten or released on the next     */
  /*    call to a FreeType function.                                       */
  /*                                                                       */
  /* <Since>                                                               */
  /*    2.3.6                                                              */
  /*                                                                       */
  FT_EXPORT( FT_UInt32* )
  FT_Face_GetVariantsOfChar( FT_Face   face,
                             FT_ULong  charcode );

/*************************************************************************/
  /*                                                                       */
  /* <Function>                                                            */
  /*    FT_Face_GetCharsOfVariant                                          */
  /*                                                                       */
  /* <Description>                                                         */
  /*    Return a zero-terminated list of Unicode character codes found for */
  /*    the specified variation selector.                                  */
  /*                                                                       */
  /* <Input>                                                               */
  /*    face ::                                                            */
  /*      A handle to the source face object.                              */
  /*                                                                       */
  /*    variantSelector ::                                                 */
  /*      The variation selector code point in Unicode.                    */
  /*                                                                       */
  /* <Return>                                                              */
  /*    A list of all the code points that are specified by this selector  */
  /*    (both default and non-default codes are returned) or NULL if there */
  /*    is no valid cmap or the variation selector is invalid.             */
  /*                                                                       */
  /* <Note>                                                                */
  /*    The last item in the array is~0; the array is owned by the         */
  /*    @FT_Face object but can be overwritten or released on the next     */
  /*    call to a FreeType function.                                       */
  /*                                                                       */
  /* <Since>                                                               */
  /*    2.3.6                                                              */
  /*                                                                       */
  FT_EXPORT( FT_UInt32* )
  FT_Face_GetCharsOfVariant( FT_Face   face,
                             FT_ULong  variantSelector );

/*************************************************************************/
  /*                                                                       */
  /* <Section>                                                             */
  /*    computations                                                       */
  /*                                                                       */
  /* <Title>                                                               */
  /*    Computations                                                       */
  /*                                                                       */
  /* <Abstract>                                                            */
  /*    Crunching fixed numbers and vectors.                               */
  /*                                                                       */
  /* <Description>                                                         */
  /*    This section contains various functions used to perform            */
  /*    computations on 16.16 fixed-float numbers or 2d vectors.           */
  /*                                                                       */
  /* <Order>                                                               */
  /*    FT_MulDiv                                                          */
  /*    FT_MulFix                                                          */
  /*    FT_DivFix                                                          */
  /*    FT_RoundFix                                                        */
  /*    FT_CeilFix                                                         */
  /*    FT_FloorFix                                                        */
  /*    FT_Vector_Transform                                                */
  /*    FT_Matrix_Multiply                                                 */
  /*    FT_Matrix_Invert                                                   */
  /*                                                                       */
  /*************************************************************************/

/*************************************************************************/
  /*                                                                       */
  /* <Function>                                                            */
  /*    FT_MulDiv                                                          */
  /*                                                                       */
  /* <Description>                                                         */
  /*    Compute `(a*b)/c' with maximum accuracy, using a 64-bit            */
  /*    intermediate integer whenever necessary.                           */
  /*                                                                       */
  /*    This function isn't necessarily as fast as some processor specific */
  /*    operations, but is at least completely portable.                   */
  /*                                                                       */
  /* <Input>                                                               */
  /*    a :: The first multiplier.                                         */
  /*                                                                       */
  /*    b :: The second multiplier.                                        */
  /*                                                                       */
  /*    c :: The divisor.                                                  */
  /*                                                                       */
  /* <Return>                                                              */
  /*    The result of `(a*b)/c'.  This function never traps when trying to */
  /*    divide by zero; it simply returns `MaxInt' or `MinInt' depending   */
  /*    on the signs of `a' and `b'.                                       */
  /*                                                                       */
  FT_EXPORT( FT_Long )
  FT_MulDiv( FT_Long  a,
             FT_Long  b,
             FT_Long  c );

/*************************************************************************/
  /*                                                                       */
  /* <Function>                                                            */
  /*    FT_MulFix                                                          */
  /*                                                                       */
  /* <Description>                                                         */
  /*    Compute `(a*b)/0x10000' with maximum accuracy.  Its main use is to */
  /*    multiply a given value by a 16.16 fixed-point factor.              */
  /*                                                                       */
  /* <Input>                                                               */
  /*    a :: The first multiplier.                                         */
  /*                                                                       */
  /*    b :: The second multiplier.  Use a 16.16 factor here whenever      */
  /*         possible (see note below).                                    */
  /*                                                                       */
  /* <Return>                                                              */
  /*    The result of `(a*b)/0x10000'.                                     */
  /*                                                                       */
  /* <Note>                                                                */
  /*    This function has been optimized for the case where the absolute   */
  /*    value of `a' is less than 2048, and `b' is a 16.16 scaling factor. */
  /*    As this happens mainly when scaling from notional units to         */
  /*    fractional pixels in FreeType, it resulted in noticeable speed     */
  /*    improvements between versions 2.x and 1.x.                         */
  /*                                                                       */
  /*    As a conclusion, always try to place a 16.16 factor as the         */
  /*    _second_ argument of this function; this can make a great          */
  /*    difference.                                                        */
  /*                                                                       */
  FT_EXPORT( FT_Long )
  FT_MulFix( FT_Long  a,
             FT_Long  b );

/*************************************************************************/
  /*                                                                       */
  /* <Function>                                                            */
  /*    FT_DivFix                                                          */
  /*                                                                       */
  /* <Description>                                                         */
  /*    Compute `(a*0x10000)/b' with maximum accuracy.  Its main use is to */
  /*    divide a given value by a 16.16 fixed-point factor.                */
  /*                                                                       */
  /* <Input>                                                               */
  /*    a :: The numerator.                                                */
  /*                                                                       */
  /*    b :: The denominator.  Use a 16.16 factor here.                    */
  /*                                                                       */
  /* <Return>                                                              */
  /*    The result of `(a*0x10000)/b'.                                     */
  /*                                                                       */
  FT_EXPORT( FT_Long )
  FT_DivFix( FT_Long  a,
             FT_Long  b );

/*************************************************************************/
  /*                                                                       */
  /* <Function>                                                            */
  /*    FT_RoundFix                                                        */
  /*                                                                       */
  /* <Description>                                                         */
  /*    Round a 16.16 fixed number.                                        */
  /*                                                                       */
  /* <Input>                                                               */
  /*    a :: The number to be rounded.                                     */
  /*                                                                       */
  /* <Return>                                                              */
  /*    `a' rounded to the nearest 16.16 fixed integer, halfway cases away */
  /*    from zero.                                                         */
  /*                                                                       */
  /* <Note>                                                                */
  /*    The function uses wrap-around arithmetic.                          */
  /*                                                                       */
  FT_EXPORT( FT_Fixed )
  FT_RoundFix( FT_Fixed  a );

/*************************************************************************/
  /*                                                                       */
  /* <Function>                                                            */
  /*    FT_CeilFix                                                         */
  /*                                                                       */
  /* <Description>                                                         */
  /*    Compute the smallest following integer of a 16.16 fixed number.    */
  /*                                                                       */
  /* <Input>                                                               */
  /*    a :: The number for which the ceiling function is to be computed.  */
  /*                                                                       */
  /* <Return>                                                              */
  /*    `a' rounded towards plus infinity.                                 */
  /*                                                                       */
  /* <Note>                                                                */
  /*    The function uses wrap-around arithmetic.                          */
  /*                                                                       */
  FT_EXPORT( FT_Fixed )
  FT_CeilFix( FT_Fixed  a );

/*************************************************************************/
  /*                                                                       */
  /* <Function>                                                            */
  /*    FT_FloorFix                                                        */
  /*                                                                       */
  /* <Description>                                                         */
  /*    Compute the largest previous integer of a 16.16 fixed number.      */
  /*                                                                       */
  /* <Input>                                                               */
  /*    a :: The number for which the floor function is to be computed.    */
  /*                                                                       */
  /* <Return>                                                              */
  /*    `a' rounded towards minus infinity.                                */
  /*                                                                       */
  FT_EXPORT( FT_Fixed )
  FT_FloorFix( FT_Fixed  a );

/*************************************************************************/
  /*                                                                       */
  /* <Function>                                                            */
  /*    FT_Vector_Transform                                                */
  /*                                                                       */
  /* <Description>                                                         */
  /*    Transform a single vector through a 2x2 matrix.                    */
  /*                                                                       */
  /* <InOut>                                                               */
  /*    vector :: The target vector to transform.                          */
  /*                                                                       */
  /* <Input>                                                               */
  /*    matrix :: A pointer to the source 2x2 matrix.                      */
  /*                                                                       */
  /* <Note>                                                                */
  /*    The result is undefined if either `vector' or `matrix' is invalid. */
  /*                                                                       */
  FT_EXPORT( void )
  FT_Vector_Transform( FT_Vector*        vec,
                       const FT_Matrix*  matrix );

/*************************************************************************/
  /*                                                                       */
  /* <Section>                                                             */
  /*    version                                                            */
  /*                                                                       */
  /* <Title>                                                               */
  /*    FreeType Version                                                   */
  /*                                                                       */
  /* <Abstract>                                                            */
  /*    Functions and macros related to FreeType versions.                 */
  /*                                                                       */
  /* <Description>                                                         */
  /*    Note that those functions and macros are of limited use because    */
  /*    even a new release of FreeType with only documentation changes     */
  /*    increases the version number.                                      */
  /*                                                                       */
  /* <Order>                                                               */
  /*    FT_Library_Version                                                 */
  /*                                                                       */
  /*    FREETYPE_MAJOR                                                     */
  /*    FREETYPE_MINOR                                                     */
  /*    FREETYPE_PATCH                                                     */
  /*                                                                       */
  /*    FT_Face_CheckTrueTypePatents                                       */
  /*    FT_Face_SetUnpatentedHinting                                       */
  /*                                                                       */
  /*    FREETYPE_XXX                                                       */
  /*                                                                       */
  /*************************************************************************/

/*************************************************************************
   *
   * @enum:
   *   FREETYPE_XXX
   *
   * @description:
   *   These three macros identify the FreeType source code version.
   *   Use @FT_Library_Version to access them at runtime.
   *
   * @values:
   *   FREETYPE_MAJOR :: The major version number.
   *   FREETYPE_MINOR :: The minor version number.
   *   FREETYPE_PATCH :: The patch level.
   *
   * @note:
   *   The version number of FreeType if built as a dynamic link library
   *   with the `libtool' package is _not_ controlled by these three
   *   macros.
   *
   */
#define FREETYPE_MAJOR  2
#define FREETYPE_MINOR  9
#define FREETYPE_PATCH  1

/*************************************************************************/
  /*                                                                       */
  /* <Function>                                                            */
  /*    FT_Library_Version                                                 */
  /*                                                                       */
  /* <Description>                                                         */
  /*    Return the version of the FreeType library being used.  This is    */
  /*    useful when dynamically linking to the library, since one cannot   */
  /*    use the macros @FREETYPE_MAJOR, @FREETYPE_MINOR, and               */
  /*    @FREETYPE_PATCH.                                                   */
  /*                                                                       */
  /* <Input>                                                               */
  /*    library :: A source library handle.                                */
  /*                                                                       */
  /* <Output>                                                              */
  /*    amajor  :: The major version number.                               */
  /*                                                                       */
  /*    aminor  :: The minor version number.                               */
  /*                                                                       */
  /*    apatch  :: The patch version number.                               */
  /*                                                                       */
  /* <Note>                                                                */
  /*    The reason why this function takes a `library' argument is because */
  /*    certain programs implement library initialization in a custom way  */
  /*    that doesn't use @FT_Init_FreeType.                                */
  /*                                                                       */
  /*    In such cases, the library version might not be available before   */
  /*    the library object has been created.                               */
  /*                                                                       */
  FT_EXPORT( void )
  FT_Library_Version( FT_Library   library,
                      FT_Int      *amajor,
                      FT_Int      *aminor,
                      FT_Int      *apatch );

/*************************************************************************/
  /*                                                                       */
  /* <Function>                                                            */
  /*    FT_Face_CheckTrueTypePatents                                       */
  /*                                                                       */
  /* <Description>                                                         */
  /*    Deprecated, does nothing.                                          */
  /*                                                                       */
  /* <Input>                                                               */
  /*    face :: A face handle.                                             */
  /*                                                                       */
  /* <Return>                                                              */
  /*    Always returns false.                                              */
  /*                                                                       */
  /* <Note>                                                                */
  /*    Since May 2010, TrueType hinting is no longer patented.            */
  /*                                                                       */
  /* <Since>                                                               */
  /*    2.3.5                                                              */
  /*                                                                       */
  FT_EXPORT( FT_Bool )
  FT_Face_CheckTrueTypePatents( FT_Face  face );

/*************************************************************************/
  /*                                                                       */
  /* <Function>                                                            */
  /*    FT_Face_SetUnpatentedHinting                                       */
  /*                                                                       */
  /* <Description>                                                         */
  /*    Deprecated, does nothing.                                          */
  /*                                                                       */
  /* <Input>                                                               */
  /*    face  :: A face handle.                                            */
  /*                                                                       */
  /*    value :: New boolean setting.                                      */
  /*                                                                       */
  /* <Return>                                                              */
  /*    Always returns false.                                              */
  /*                                                                       */
  /* <Note>                                                                */
  /*    Since May 2010, TrueType hinting is no longer patented.            */
  /*                                                                       */
  /* <Since>                                                               */
  /*    2.3.5                                                              */
  /*                                                                       */
  FT_EXPORT( FT_Bool )
  FT_Face_SetUnpatentedHinting( FT_Face  face,
                                FT_Bool  value );

/* */

FT_END_HEADER

#endif /* FREETYPE_H_ */

/* END */

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