text: /***************************************************************************/
  /*                                                                         */
  /*  freetype.h                                                             */
  /*                                                                         */
  /*    FreeType high-level API and common types (specification only).       */
  /*                                                                         */
  /*  Copyright 1996-2016 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_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_MULTIPLE_MASTERS                                            */
    /*    FT_HAS_COLOR                                                       */
    /*                                                                       */
    /*    FT_IS_SFNT                                                         */
    /*    FT_IS_SCALABLE                                                     */
    /*    FT_IS_FIXED_WIDTH                                                  */
    /*    FT_IS_CID_KEYED                                                    */
    /*    FT_IS_TRICKY                                                       */
    /*                                                                       */
    /*    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_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 used 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.                  */
    /*                                                                       */
    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.  Thus when */
    /*      the driver finds it incorrect, it sets `size' to some calculated */
    /*      values and sets `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.  Each module can be a  */
    /*    font driver, a renderer, or anything else that provides services   */
    /*    to the formers.                                                    */
    /*                                                                       */
    typedef struct FT_ModuleRec_*  FT_Module;
  
  
    /*************************************************************************/
    /*                                                                       */
    /* <Type>                                                                */
    /*    FT_Driver                                                          */
    /*                                                                       */
    /* <Description>                                                         */
    /*    A handle to a given FreeType font driver object.  Each font driver */
    /*    is a special 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 special    */
    /*    module in charge of converting a glyph image to a bitmap, when     */
    /*    necessary.  Each renderer supports a given 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 given typographic face object.  A face object models */
    /*    a given typeface, in a given style.                                */
    /*                                                                       */
    /* <Note>                                                                */
    /*    Each 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 filepathname 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 used to model a face scaled to a given       */
    /*    character size.                                                    */
    /*                                                                       */
    /* <Note>                                                                */
    /*    Each @FT_Face has an _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 where it  */
    /*    is possible to load 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 given character map.  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' and 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.                           */
    /*                                                                       */
    /* <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 used 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 ::                                             */
    /*      Corresponds to 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 ::                                           */
    /*      Corresponds to the Microsoft Symbol encoding, used to encode     */
    /*      mathematical symbols and wingdings.  For more information, see   */
    /*      `http://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 ::                                                */
    /*      Corresponds to Japanese SJIS encoding.  More info at             */
    /*      `http://en.wikipedia.org/wiki/Shift_JIS'.                        */
    /*      See note on multi-byte encodings below.                          */
    /*                                                                       */
    /*    FT_ENCODING_GB2312 ::                                              */
    /*      Corresponds to an encoding system for Simplified Chinese as      */
    /*      used in mainland China.                                          */
    /*                                                                       */
    /*    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 Wansung.      */
    /*      For more information see                                         */
    /*      `https://msdn.microsoft.com/en-US/goglobal/cc305154'.            */
    /*                                                                       */
    /*    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 Hangeul 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 ::                                      */
    /*      Corresponds to the Adobe Standard encoding, as found in Type~1,  */
    /*      CFF, and OpenType/CFF fonts.  It is limited to 256 character     */
    /*      codes.                                                           */
    /*                                                                       */
    /*    FT_ENCODING_ADOBE_EXPERT ::                                        */
    /*      Corresponds to the 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 ::                                         */
    /*      Corresponds to the 8-bit Apple roman encoding.  Many TrueType    */
    /*      and OpenType fonts contain a charmap for this encoding, since    */
    /*      older versions of Mac OS are able to use it.                     */
    /*                                                                       */
    /*    FT_ENCODING_OLD_LATIN_2 ::                                         */
    /*      This value is deprecated and was never 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_GB2312.  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 automatically synthesizes a Unicode charmap   */
    /*    for PostScript fonts, using their glyph names dictionaries.        */
    /*    However, it also reports the encodings defined explicitly in the   */
    /*    font file, for the cases when they are needed, with the Adobe      */
    /*    values as well.                                                    */
    /*                                                                       */
    /*    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  */
    /*                                                                       */
    /*      http://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_GB2312,  '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 backwards compatibility */
      FT_ENCODING_MS_SJIS    = FT_ENCODING_SJIS,
      FT_ENCODING_MS_GB2312  = FT_ENCODING_GB2312,
      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_GB2312
  #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 should be emulated   */
    /*                   for other formats.                                  */
    /*                                                                       */
    /*    encoding_id :: A platform specific encoding number.  This also     */
    /*                   comes from the TrueType specification and should be */
    /*                   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, used to    */
    /*    model 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 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.                              */
    /*                                                                       */
    /*                           Bits 16-30 are relevant to GX variation     */
    /*                           fonts only, holding the named instance      */
    /*                           index for the current face index (starting  */
    /*                           with value~1; value~0 indicates font access */
    /*                           without GX variation data).  For non-GX     */
    /*                           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).   */
    /*                                                                       */
    /*    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.  Bits   */
    /*                           16-30 hold the number of named instances    */
    /*                           available for the current face if we have a */
    /*                           GX variation (sub)font.  Bit 31 is always   */
    /*                           zero (this is, `style_flags' is always a    */
    /*                           positive value).                            */
    /*                                                                       */
    /*    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, 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       */
    /*                           usually negative.  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.                                                 */
    /*                                                                       */
    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 ::                                           */
    /*      Indicates that the face contains outline glyphs.  This doesn't   */
    /*      prevent bitmap strikes, i.e., a face can have both this and      */
    /*      @FT_FACE_FLAG_FIXED_SIZES set.                                   */
    /*                                                                       */
    /*    FT_FACE_FLAG_FIXED_SIZES ::                                        */
    /*      Indicates that the face contains bitmap strikes.  See also the   */
    /*      `num_fixed_sizes' and `available_sizes' fields of @FT_FaceRec.   */
    /*                                                                       */
    /*    FT_FACE_FLAG_FIXED_WIDTH ::                                        */
    /*      Indicates that the face contains fixed-width characters (like    */
    /*      Courier, Lucido, MonoType, etc.).                                */
    /*                                                                       */
    /*    FT_FACE_FLAG_SFNT ::                                               */
    /*      Indicates that the face uses the `sfnt' storage scheme.  For     */
    /*      now, this means TrueType and OpenType.                           */
    /*                                                                       */
    /*    FT_FACE_FLAG_HORIZONTAL ::                                         */
    /*      Indicates that the face contains horizontal glyph metrics.  This */
    /*      should be set for all common formats.                            */
    /*                                                                       */
    /*    FT_FACE_FLAG_VERTICAL ::                                           */
    /*      Indicates that the face contains vertical glyph metrics.  This   */
    /*      is only available in some formats, not all of them.              */
    /*                                                                       */
    /*    FT_FACE_FLAG_KERNING ::                                            */
    /*      Indicates that the face contains kerning information.  If set,   */
    /*      the kerning distance can be retrieved through the function       */
    /*      @FT_Get_Kerning.  Otherwise the function always return the       */
    /*      vector (0,0).  Note that FreeType doesn't handle kerning data    */
    /*      from the `GPOS' table (as present in some OpenType fonts).       */
    /*                                                                       */
    /*    FT_FACE_FLAG_FAST_GLYPHS ::                                        */
    /*      THIS FLAG IS DEPRECATED.  DO NOT USE OR TEST IT.                 */
    /*                                                                       */
    /*    FT_FACE_FLAG_MULTIPLE_MASTERS ::                                   */
    /*      Indicates that the font contains multiple masters and is capable */
    /*      of interpolating between them.  See the multiple-masters         */
    /*      specific API for details.                                        */
    /*                                                                       */
    /*    FT_FACE_FLAG_GLYPH_NAMES ::                                        */
    /*      Indicates that the font contains glyph names that can be         */
    /*      retrieved through @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 ::                                             */
    /*      Set if 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 ::                                          */
    /*      Set if the font is CID-keyed.  In that case, the font 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 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 ::                                             */
    /*      Set if the font is `tricky', this is, it always needs the        */
    /*      font format's native hinting engine to get a reasonable result.  */
    /*      A typical example is the Chinese font `mingli.ttf' 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 ::                                              */
    /*      Set if the font has color glyph tables.  To access color glyphs  */
    /*      use @FT_LOAD_COLOR.                                              */
    /*                                                                       */
  #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 )
  
  
    /*************************************************************************
     *
     * @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 variation font.
     *
     */
  #define FT_IS_NAMED_INSTANCE( face ) \
            ( (face)->face_index & 0x7FFF0000L )
  
  
    /*************************************************************************
     *
     * @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.
     *
     */
  #define FT_HAS_COLOR( face ) \
            ( (face)->face_flags & FT_FACE_FLAG_COLOR )
  
  
    /*************************************************************************/
    /*                                                                       */
    /* <Const>                                                               */
    /*    FT_STYLE_FLAG_XXX                                                  */
    /*                                                                       */
    /* <Description>                                                         */
    /*    A list of bit flags used to indicate the style of a given face.    */
    /*    These are used in the `style_flags' field of @FT_FaceRec.          */
    /*                                                                       */
    /* <Values>                                                              */
    /*    FT_STYLE_FLAG_ITALIC ::                                            */
    /*      Indicates that a given face style is italic or oblique.          */
    /*                                                                       */
    /*    FT_STYLE_FLAG_BOLD ::                                              */
    /*      Indicates that a given 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 used 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 used 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.  See       */
    /*                    @FT_FaceRec for the details.                       */
    /*                                                                       */
    /*    descender    :: The descender in 26.6 fractional pixels.  See      */
    /*                    @FT_FaceRec for the details.                       */
    /*                                                                       */
    /*    height       :: The height in 26.6 fractional pixels.  See         */
    /*                    @FT_FaceRec for the details.                       */
    /*                                                                       */
    /*    max_advance  :: The maximum advance width in 26.6 fractional       */
    /*                    pixels.  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.                 */
    /*                                                                       */
    /*    Note that due to glyph hinting, these values might not be exact    */
    /*    for certain fonts.  Thus 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.      */
    /*                                                                       */
    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 others are    */
    /*                         possible.                                     */
    /*                                                                       */
    /*    bitmap            :: This field is used as a bitmap descriptor     */
    /*                         when the slot format is                       */
    /*                         @FT_GLYPH_FORMAT_BITMAP.  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.  Only valid if the format is  */
    /*                         @FT_GLYPH_FORMAT_BITMAP, this is, if the      */
    /*                         glyph slot contains a bitmap.                 */
    /*                                                                       */
    /*    bitmap_top        :: The bitmap's top bearing expressed in integer */
    /*                         pixels.  Remember that 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, embolded, 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.         */
    /*                                                                       */
    /*    control_len       :: This is the length in bytes of the control    */
    /*                         data.                                         */
    /*                                                                       */
    /*    other             :: Really wicked formats can use this pointer to */
    /*                         present their own glyph image to client       */
    /*                         applications.  Note that the application      */
    /*                         needs to know about the image format.         */
    /*                                                                       */
    /*    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).                                                          */
    /*                                                                       */
    /*    This image can later be converted into a bitmap by calling         */
    /*    @FT_Render_Glyph.  This function finds 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.         */
    /*                                                                       */
    /* <Note>                                                                */
    /*    Here is a small pseudo code fragment that shows how to use         */
    /*    `lsb_delta' and `rsb_delta':                                       */
    /*                                                                       */
    /*    {                                                                  */
    /*      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 - face->glyph->lsb_delta >= 32 )           */
    /*          origin_x -= 64;                                              */
    /*        else if ( prev_rsb_delta - face->glyph->lsb_delta < -32 )      */
    /*          origin_x += 64;                                              */
    /*                                                                       */
    /*        prev_rsb_delta = face->glyph->rsb_delta;                       */
    /*                                                                       */
    /*        <save glyph image, or render glyph, or ...>                    */
    /*                                                                       */
    /*        origin_x += face->glyph->advance.x;                            */
    /*      endfor                                                           */
    /*    }                                                                  */
    /*                                                                       */
    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).  */
    /*                                                                       */
    /*    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.                              */
    /*                                                                       */
    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 used to pass more or less generic parameters to */
    /*    @FT_Open_Face.                                                     */
    /*                                                                       */
    /* <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 the    */
    /*    various FT_PARAM_TAG_XXX flags for more information.               */
    /*                                                                       */
    typedef struct  FT_Parameter_
    {
      FT_ULong    tag;
      FT_Pointer  data;
  
    } FT_Parameter;
  
  
    /*************************************************************************/
    /*                                                                       */
    /* <Struct>                                                              */
    /*    FT_Open_Args                                                       */
    /*                                                                       */
    /* <Description>                                                         */
    /*    A structure used 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 to open  */
    /*                   the face.  If set to~0, 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 backwards 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>                                                         */
    /*    This function calls @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>                                                         */
    /*    This function calls @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.                               */
    /*                                                                       */
    /*                  Bits 16-30 are relevant to GX 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-GX 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 GX 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 16-bit       */
    /*                  value), bits 16-30 in `face->style_flags' give the   */
    /*                  number of named instances in face `N' if we have a   */
    /*                  GX 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>                                                         */
    /*    This function calls @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 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.                                            */
    /*                                                                       */
    /* <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 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.                                                  */
    /*                                                                       */
    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 are 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 used 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.                   */
    /*                                                                       */
    /*    vertResolution :: The vertical resolution (dpi, i.e., pixels per   */
    /*                      inch).  If set to zero, `height' is treated as a */
    /*                      26.6 fractional *pixel* value.                   */
    /*                                                                       */
    /* <Note>                                                                */
    /*    If `width' is zero, then 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        */
    /*    `http://www.freetype.org/freetype2/docs/glyphs/glyphs-2.html'      */
    /*                                                                       */
    /*    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>                                                         */
    /*    This function calls @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>                                                                */
    /*    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>                                                         */
    /*    This function calls @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>                                                         */
    /*    A function used to load a single 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>                                                         */
    /*    A function used to load a single glyph into the glyph slot of a    */
    /*    face object, according to 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.  */
    /*                                                                       */
    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 used with @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 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 ::
     *     Indicates that the auto-hinter is preferred over the font's native
     *     hinter.  See also the note below.
     *
     *   FT_LOAD_PEDANTIC ::
     *     Indicates that the font driver should 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 ::
     *     Indicate that the font driver should not load composite glyphs
     *     recursively.  Instead, it 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 ::
     *     Indicates that the transform matrix set by @FT_Set_Transform should
     *     be ignored.
     *
     *   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 ::
     *     Indicates that the `linearHoriAdvance' and `linearVertAdvance'
     *     fields of @FT_GlyphSlotRec should be kept in font units.  See
     *     @FT_GlyphSlotRec for details.
     *
     *   FT_LOAD_NO_AUTOHINT ::
     *     Disable auto-hinter.  See also the note below.
     *
     *   FT_LOAD_COLOR ::
     *     This flag is used to request loading of color embedded-bitmap
     *     images.  The resulting color bitmaps, if available, will have the
     *     @FT_PIXEL_MODE_BGRA format.  When the flag is not used and color
     *     bitmaps are found, they will be converted to 256-level gray
     *     bitmaps transparently.  Those bitmaps will be in the
     *     @FT_PIXEL_MODE_GRAY format.
     *
     *   FT_LOAD_COMPUTE_METRICS ::
     *     This flag sets computing glyph metrics without the use of bundled
     *     metrics tables (for example, the `hdmx' table in TrueType fonts).
     *     Well-behaving fonts have optimized bundled metrics and these should
     *     be used.  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_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 )
  
    /* */
  
    /* 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 that are used to select a specific hinting algorithm
     *   to use by the hinter.  You should OR one of these values to your
     *   `load_flags' when calling @FT_Load_Glyph.
     *
     *   Note that 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 ::
     *     This corresponds to 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 Microsoft's ClearType and Adobe's
     *     proprietary 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.
     *
     *   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_NORMAL 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 );
     *     }
     *
     */
  #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>                                                         */
    /*    A function used to 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~0 for */
    /*              the identity matrix.                                     */
    /*    delta  :: A pointer to the translation vector.  Use~0 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>                                                         */
    /*    An enumeration type that lists the 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 ::                                           */
    /*      This is the 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 sub-pixel        */
    /*      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 sub-pixel 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>                                                                */
    /*    The LCD-optimized glyph bitmaps produced by FT_Render_Glyph can be */
    /*    filtered to reduce color-fringes by using @FT_Library_SetLcdFilter */
    /*    (not active in the default builds).  It is up to the caller to     */
    /*    either call @FT_Library_SetLcdFilter (if available) or do the      */
    /*    filtering itself.                                                  */
    /*                                                                       */
    /*    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 :: This is 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 used to specify which kerning values to return in   */
    /*    @FT_Get_Kerning.                                                   */
    /*                                                                       */
    /* <Values>                                                              */
    /*    FT_KERNING_DEFAULT  :: Return grid-fitted kerning distances in     */
    /*                           pixels (value is~0).  Whether they are      */
    /*                           scaled depends on @FT_LOAD_NO_SCALE.        */
    /*                                                                       */
    /*    FT_KERNING_UNFITTED :: Return un-grid-fitted kerning distances in  */
    /*                           26.6 fractional pixels.  Whether they are   */
    /*                           scaled depends on @FT_LOAD_NO_SCALE.        */
    /*                                                                       */
    /*    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.                          */
    /*                                                                       */
    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 a 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.                    */
    /*                                                                       */
    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 the 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 and TrueType 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.                                                                */
    /*                                                                       */
    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 a type~14 charmap is selected.                    */
    /*                                                                       */
    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 a charmap object 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>                                                         */
    /*    This function is used to return the first character code in the    */
    /*    current charmap of a given face.  It also returns the              */
    /*    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 with @FT_Get_Next_Char to be able 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>                                                         */
    /*    This function is used to 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 this 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_Get_Name_Index                                                  */
    /*                                                                       */
    /* <Description>                                                         */
    /*    Return the glyph index of a given glyph name.  This function uses  */
    /*    driver specific objects to do the translation.                     */
    /*                                                                       */
    /* <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 used to describe subglyphs.  Please refer to the
     *   TrueType specification for the meaning of the various flags.
     *
     * @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
     *   TrueType 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                                                                */
    /*    http://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 ::                           */
    /*      If this bit is set, 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 ::                                    */
    /*      If this bit is set, 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 ::                                         */
    /*      If this bit is set, the font may not be subsetted prior to       */
    /*      embedding.                                                       */
    /*                                                                       */
    /*    FT_FSTYPE_BITMAP_EMBEDDING_ONLY ::                                 */
    /*      If this bit is set, 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, @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>                                                               */
    /*    Glyph Variants                                                     */
    /*                                                                       */
    /* <Abstract>                                                            */
    /*    The FreeType~2 interface to Unicode Ideographic Variation          */
    /*    Sequences (IVS), using the SFNT cmap format~14.                    */
    /*                                                                       */
    /* <Description>                                                         */
    /*    Many CJK characters 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 Ideographic Variation Sequences (IVS), consisting of a   */
    /*    Unicode base character and one of 240 variant selectors            */
    /*    (U+E0100-U+E01EF), instead of further extending the already huge   */
    /*    code range for CJK characters.                                     */
    /*                                                                       */
    /*    An IVS is registered and unique; for further details please refer  */
    /*    to Unicode Technical Standard #37, the Ideographic Variation       */
    /*    Database:                                                          */
    /*                                                                       */
    /*      http://www.unicode.org/reports/tr37/                             */
    /*                                                                       */
    /*    To date (November 2014), the character with the most variants is   */
    /*    U+9089, having 32 such IVS.                                        */
    /*                                                                       */
    /*    Adobe and MS decided to support IVS 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 variants    */
    /*    supported by the font.                                             */
    /*                                                                       */
    /*    A variant may be either `default' or `non-default'.  A default     */
    /*    variant is the one you will get for that code point if you look it */
    /*    up in the standard Unicode cmap.  A non-default variant 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 variant 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 variant.             */
    /*                                                                       */
    /* <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 variant 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 variant 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 variant 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 variant 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 variant selector.                                    */
    /*                                                                       */
    /* <Input>                                                               */
    /*    face ::                                                            */
    /*      A handle to the source face object.                              */
    /*                                                                       */
    /*    variantSelector ::                                                 */
    /*      The variant 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 variant 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>                                                         */
    /*    A very simple function used to perform the computation `(a*b)/c'   */
    /*    with maximum accuracy (it uses 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>                                                         */
    /*    A very simple function used to perform the computation             */
    /*    `(a*b)/0x10000' with maximum accuracy.  Most of the time this is   */
    /*    used 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>                                                         */
    /*    A very simple function used to perform the computation             */
    /*    `(a*0x10000)/b' with maximum accuracy.  Most of the time, this is  */
    /*    used 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>                                                         */
    /*    A very simple function used to round a 16.16 fixed number.         */
    /*                                                                       */
    /* <Input>                                                               */
    /*    a :: The number to be rounded.                                     */
    /*                                                                       */
    /* <Return>                                                              */
    /*    `a' rounded to nearest 16.16 fixed integer, halfway cases away     */
    /*    from zero.                                                         */
    /*                                                                       */
    FT_EXPORT( FT_Fixed )
    FT_RoundFix( FT_Fixed  a );
  
  
    /*************************************************************************/
    /*                                                                       */
    /* <Function>                                                            */
    /*    FT_CeilFix                                                         */
    /*                                                                       */
    /* <Description>                                                         */
    /*    A very simple function used to compute the ceiling function 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.                                 */
    /*                                                                       */
    FT_EXPORT( FT_Fixed )
    FT_CeilFix( FT_Fixed  a );
  
  
    /*************************************************************************/
    /*                                                                       */
    /* <Function>                                                            */
    /*    FT_FloorFix                                                        */
    /*                                                                       */
    /* <Description>                                                         */
    /*    A very simple function used to compute the floor function 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  7
  #define FREETYPE_PATCH  0
  
  
    /*************************************************************************/
    /*                                                                       */
    /* <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 */
  