path: root/3rdparty/include/freetype/internal/ftobjs.h

/***************************************************************************/
/*                                                                         */
/*  ftobjs.h                                                               */
/*                                                                         */
/*    The FreeType private base classes (specification).                   */
/*                                                                         */
/*  Copyright 1996-2018 by                                                 */
/*  David Turner, Robert Wilhelm, and Werner Lemberg.                      */
/*                                                                         */
/*  This file is part of the FreeType project, and may only be used,       */
/*  modified, and distributed under the terms of the FreeType project      */
/*  license, LICENSE.TXT.  By continuing to use, modify, or distribute     */
/*  this file you indicate that you have read the license and              */
/*  understand and accept it fully.                                        */
/*                                                                         */
/***************************************************************************/


  /*************************************************************************/
  /*                                                                       */
  /*  This file contains the definition of all internal FreeType classes.  */
  /*                                                                       */
  /*************************************************************************/


#ifndef FTOBJS_H_
#define FTOBJS_H_

#include <ft2build.h>
#include FT_RENDER_H
#include FT_SIZES_H
#include FT_LCD_FILTER_H
#include FT_INTERNAL_MEMORY_H
#include FT_INTERNAL_GLYPH_LOADER_H
#include FT_INTERNAL_DRIVER_H
#include FT_INTERNAL_AUTOHINT_H
#include FT_INTERNAL_SERVICE_H
#include FT_INTERNAL_PIC_H
#include FT_INTERNAL_CALC_H

#ifdef FT_CONFIG_OPTION_INCREMENTAL
#include FT_INCREMENTAL_H
#endif


FT_BEGIN_HEADER


  /*************************************************************************/
  /*                                                                       */
  /* Some generic definitions.                                             */
  /*                                                                       */
#ifndef TRUE
#define TRUE  1
#endif

#ifndef FALSE
#define FALSE  0
#endif

#ifndef NULL
#define NULL  (void*)0
#endif


  /*************************************************************************/
  /*                                                                       */
  /* The min and max functions missing in C.  As usual, be careful not to  */
  /* write things like FT_MIN( a++, b++ ) to avoid side effects.           */
  /*                                                                       */
#define FT_MIN( a, b )  ( (a) < (b) ? (a) : (b) )
#define FT_MAX( a, b )  ( (a) > (b) ? (a) : (b) )

#define FT_ABS( a )     ( (a) < 0 ? -(a) : (a) )

  /*
   *  Approximate sqrt(x*x+y*y) using the `alpha max plus beta min'
   *  algorithm.  We use alpha = 1, beta = 3/8, giving us results with a
   *  largest error less than 7% compared to the exact value.
   */
#define FT_HYPOT( x, y )                 \
          ( x = FT_ABS( x ),             \
            y = FT_ABS( y ),             \
            x > y ? x + ( 3 * y >> 3 )   \
                  : y + ( 3 * x >> 3 ) )

  /* we use FT_TYPEOF to suppress signedness compilation warnings */
#define FT_PAD_FLOOR( x, n )  ( (x) & ~FT_TYPEOF( x )( (n) - 1 ) )
#define FT_PAD_ROUND( x, n )  FT_PAD_FLOOR( (x) + (n) / 2, n )
#define FT_PAD_CEIL( x, n )   FT_PAD_FLOOR( (x) + (n) - 1, n )

#define FT_PIX_FLOOR( x )     ( (x) & ~FT_TYPEOF( x )63 )
#define FT_PIX_ROUND( x )     FT_PIX_FLOOR( (x) + 32 )
#define FT_PIX_CEIL( x )      FT_PIX_FLOOR( (x) + 63 )

  /* specialized versions (for signed values)                   */
  /* that don't produce run-time errors due to integer overflow */
#define FT_PAD_ROUND_LONG( x, n )  FT_PAD_FLOOR( ADD_LONG( (x), (n) / 2 ), \
                                                 n )
#define FT_PAD_CEIL_LONG( x, n )   FT_PAD_FLOOR( ADD_LONG( (x), (n) - 1 ), \
                                                 n )
#define FT_PIX_ROUND_LONG( x )     FT_PIX_FLOOR( ADD_LONG( (x), 32 ) )
#define FT_PIX_CEIL_LONG( x )      FT_PIX_FLOOR( ADD_LONG( (x), 63 ) )

#define FT_PAD_ROUND_INT32( x, n )  FT_PAD_FLOOR( ADD_INT32( (x), (n) / 2 ), \
                                                  n )
#define FT_PAD_CEIL_INT32( x, n )   FT_PAD_FLOOR( ADD_INT32( (x), (n) - 1 ), \
                                                  n )
#define FT_PIX_ROUND_INT32( x )     FT_PIX_FLOOR( ADD_INT32( (x), 32 ) )
#define FT_PIX_CEIL_INT32( x )      FT_PIX_FLOOR( ADD_INT32( (x), 63 ) )


  /*
   *  character classification functions -- since these are used to parse
   *  font files, we must not use those in <ctypes.h> which are
   *  locale-dependent
   */
#define  ft_isdigit( x )   ( ( (unsigned)(x) - '0' ) < 10U )

#define  ft_isxdigit( x )  ( ( (unsigned)(x) - '0' ) < 10U || \
                             ( (unsigned)(x) - 'a' ) < 6U  || \
                             ( (unsigned)(x) - 'A' ) < 6U  )

  /* the next two macros assume ASCII representation */
#define  ft_isupper( x )  ( ( (unsigned)(x) - 'A' ) < 26U )
#define  ft_islower( x )  ( ( (unsigned)(x) - 'a' ) < 26U )

#define  ft_isalpha( x )  ( ft_isupper( x ) || ft_islower( x ) )
#define  ft_isalnum( x )  ( ft_isdigit( x ) || ft_isalpha( x ) )


  /*************************************************************************/
  /*************************************************************************/
  /*************************************************************************/
  /****                                                                 ****/
  /****                                                                 ****/
  /****                       C H A R M A P S                           ****/
  /****                                                                 ****/
  /****                                                                 ****/
  /*************************************************************************/
  /*************************************************************************/
  /*************************************************************************/

  /* handle to internal charmap object */
  typedef struct FT_CMapRec_*              FT_CMap;

  /* handle to charmap class structure */
  typedef const struct FT_CMap_ClassRec_*  FT_CMap_Class;

  /* internal charmap object structure */
  typedef struct  FT_CMapRec_
  {
    FT_CharMapRec  charmap;
    FT_CMap_Class  clazz;

  } FT_CMapRec;

  /* typecast any pointer to a charmap handle */
#define FT_CMAP( x )  ( (FT_CMap)( x ) )

  /* obvious macros */
#define FT_CMAP_PLATFORM_ID( x )  FT_CMAP( x )->charmap.platform_id
#define FT_CMAP_ENCODING_ID( x )  FT_CMAP( x )->charmap.encoding_id
#define FT_CMAP_ENCODING( x )     FT_CMAP( x )->charmap.encoding
#define FT_CMAP_FACE( x )         FT_CMAP( x )->charmap.face


  /* class method definitions */
  typedef FT_Error
  (*FT_CMap_InitFunc)( FT_CMap     cmap,
                       FT_Pointer  init_data );

  typedef void
  (*FT_CMap_DoneFunc)( FT_CMap  cmap );

  typedef FT_UInt
  (*FT_CMap_CharIndexFunc)( FT_CMap    cmap,
                            FT_UInt32  char_code );

  typedef FT_UInt
  (*FT_CMap_CharNextFunc)( FT_CMap     cmap,
                           FT_UInt32  *achar_code );

  typedef FT_UInt
  (*FT_CMap_CharVarIndexFunc)( FT_CMap    cmap,
                               FT_CMap    unicode_cmap,
                               FT_UInt32  char_code,
                               FT_UInt32  variant_selector );

  typedef FT_Bool
  (*FT_CMap_CharVarIsDefaultFunc)( FT_CMap    cmap,
                                   FT_UInt32  char_code,
                                   FT_UInt32  variant_selector );

  typedef FT_UInt32 *
  (*FT_CMap_VariantListFunc)( FT_CMap    cmap,
                              FT_Memory  mem );

  typedef FT_UInt32 *
  (*FT_CMap_CharVariantListFunc)( FT_CMap    cmap,
                                  FT_Memory  mem,
                                  FT_UInt32  char_code );

  typedef FT_UInt32 *
  (*FT_CMap_VariantCharListFunc)( FT_CMap    cmap,
                                  FT_Memory  mem,
                                  FT_UInt32  variant_selector );


  typedef struct  FT_CMap_ClassRec_
  {
    FT_ULong               size;

    FT_CMap_InitFunc       init;
    FT_CMap_DoneFunc       done;
    FT_CMap_CharIndexFunc  char_index;
    FT_CMap_CharNextFunc   char_next;

    /* Subsequent entries are special ones for format 14 -- the variant */
    /* selector subtable which behaves like no other                    */

    FT_CMap_CharVarIndexFunc      char_var_index;
    FT_CMap_CharVarIsDefaultFunc  char_var_default;
    FT_CMap_VariantListFunc       variant_list;
    FT_CMap_CharVariantListFunc   charvariant_list;
    FT_CMap_VariantCharListFunc   variantchar_list;

  } FT_CMap_ClassRec;


#ifndef FT_CONFIG_OPTION_PIC

#define FT_DECLARE_CMAP_CLASS( class_ )              \
  FT_CALLBACK_TABLE const  FT_CMap_ClassRec class_;

#define FT_DEFINE_CMAP_CLASS(       \
          class_,                   \
          size_,                    \
          init_,                    \
          done_,                    \
          char_index_,              \
          char_next_,               \
          char_var_index_,          \
          char_var_default_,        \
          variant_list_,            \
          charvariant_list_,        \
          variantchar_list_ )       \
  FT_CALLBACK_TABLE_DEF             \
  const FT_CMap_ClassRec  class_ =  \
  {                                 \
    size_,                          \
    init_,                          \
    done_,                          \
    char_index_,                    \
    char_next_,                     \
    char_var_index_,                \
    char_var_default_,              \
    variant_list_,                  \
    charvariant_list_,              \
    variantchar_list_               \
  };

#else /* FT_CONFIG_OPTION_PIC */

#define FT_DECLARE_CMAP_CLASS( class_ )                  \
  void                                                   \
  FT_Init_Class_ ## class_( FT_Library         library,  \
                            FT_CMap_ClassRec*  clazz );

#define FT_DEFINE_CMAP_CLASS(                            \
          class_,                                        \
          size_,                                         \
          init_,                                         \
          done_,                                         \
          char_index_,                                   \
          char_next_,                                    \
          char_var_index_,                               \
          char_var_default_,                             \
          variant_list_,                                 \
          charvariant_list_,                             \
          variantchar_list_ )                            \
  void                                                   \
  FT_Init_Class_ ## class_( FT_Library         library,  \
                            FT_CMap_ClassRec*  clazz )   \
  {                                                      \
    FT_UNUSED( library );                                \
                                                         \
    clazz->size             = size_;                     \
    clazz->init             = init_;                     \
    clazz->done             = done_;                     \
    clazz->char_index       = char_index_;               \
    clazz->char_next        = char_next_;                \
    clazz->char_var_index   = char_var_index_;           \
    clazz->char_var_default = char_var_default_;         \
    clazz->variant_list     = variant_list_;             \
    clazz->charvariant_list = charvariant_list_;         \
    clazz->variantchar_list = variantchar_list_;         \
  }

#endif /* FT_CONFIG_OPTION_PIC */


  /* create a new charmap and add it to charmap->face */
  FT_BASE( FT_Error )
  FT_CMap_New( FT_CMap_Class  clazz,
               FT_Pointer     init_data,
               FT_CharMap     charmap,
               FT_CMap       *acmap );

  /* destroy a charmap and remove it from face's list */
  FT_BASE( void )
  FT_CMap_Done( FT_CMap  cmap );


  /* adds LCD padding to Min and Max boundaries */
  FT_BASE( void )
  ft_lcd_padding( FT_Pos*       Min,
                  FT_Pos*       Max,
                  FT_GlyphSlot  slot );

#ifdef FT_CONFIG_OPTION_SUBPIXEL_RENDERING

  typedef void  (*FT_Bitmap_LcdFilterFunc)( FT_Bitmap*      bitmap,
                                            FT_Render_Mode  render_mode,
                                            FT_Byte*        weights );


  /* This is the default LCD filter, an in-place, 5-tap FIR filter. */
  FT_BASE( void )
  ft_lcd_filter_fir( FT_Bitmap*           bitmap,
                     FT_Render_Mode       mode,
                     FT_LcdFiveTapFilter  weights );

#endif /* FT_CONFIG_OPTION_SUBPIXEL_RENDERING */

  /*************************************************************************/
  /*                                                                       */
  /* <Struct>                                                              */
  /*    FT_Face_InternalRec                                                */
  /*                                                                       */
  /* <Description>                                                         */
  /*    This structure contains the internal fields of each FT_Face        */
  /*    object.  These fields may change between different releases of     */
  /*    FreeType.                                                          */
  /*                                                                       */
  /* <Fields>                                                              */
  /*    max_points ::                                                      */
  /*      The maximum number of points used to store the vectorial outline */
  /*      of any glyph in this face.  If this value cannot be known in     */
  /*      advance, or if the face isn't scalable, this should be set to 0. */
  /*      Only relevant for scalable formats.                              */
  /*                                                                       */
  /*    max_contours ::                                                    */
  /*      The maximum number of contours used to store the vectorial       */
  /*      outline of any glyph in this face.  If this value cannot be      */
  /*      known in advance, or if the face isn't scalable, this should be  */
  /*      set to 0.  Only relevant for scalable formats.                   */
  /*                                                                       */
  /*    transform_matrix ::                                                */
  /*      A 2x2 matrix of 16.16 coefficients used to transform glyph       */
  /*      outlines after they are loaded from the font.  Only used by the  */
  /*      convenience functions.                                           */
  /*                                                                       */
  /*    transform_delta ::                                                 */
  /*      A translation vector used to transform glyph outlines after they */
  /*      are loaded from the font.  Only used by the convenience          */
  /*      functions.                                                       */
  /*                                                                       */
  /*    transform_flags ::                                                 */
  /*      Some flags used to classify the transform.  Only used by the     */
  /*      convenience functions.                                           */
  /*                                                                       */
  /*    services ::                                                        */
  /*      A cache for frequently used services.  It should be only         */
  /*      accessed with the macro `FT_FACE_LOOKUP_SERVICE'.                */
  /*                                                                       */
  /*    incremental_interface ::                                           */
  /*      If non-null, the interface through which glyph data and metrics  */
  /*      are loaded incrementally for faces that do not provide all of    */
  /*      this data when first opened.  This field exists only if          */
  /*      @FT_CONFIG_OPTION_INCREMENTAL is defined.                        */
  /*                                                                       */
  /*    no_stem_darkening ::                                               */
  /*      Overrides the module-level default, see @stem-darkening[cff],    */
  /*      for example.  FALSE and TRUE toggle stem darkening on and off,   */
  /*      respectively, value~-1 means to use the module/driver default.   */
  /*                                                                       */
  /*    random_seed ::                                                     */
  /*      If positive, override the seed value for the CFF `random'        */
  /*      operator.  Value~0 means to use the font's value.  Value~-1      */
  /*      means to use the CFF driver's default.                           */
  /*                                                                       */
  /*    lcd_weights      ::                                                */
  /*    lcd_filter_func  ::                                                */
  /*      If subpixel rendering is activated, the LCD filtering weights    */
  /*      and callback function.                                           */
  /*                                                                       */
  /*    refcount ::                                                        */
  /*      A counter initialized to~1 at the time an @FT_Face structure is  */
  /*      created.  @FT_Reference_Face increments this counter, and        */
  /*      @FT_Done_Face only destroys a face if the counter is~1,          */
  /*      otherwise it simply decrements it.                               */
  /*                                                                       */
  typedef struct  FT_Face_InternalRec_
  {
    FT_Matrix  transform_matrix;
    FT_Vector  transform_delta;
    FT_Int     transform_flags;

    FT_ServiceCacheRec  services;

#ifdef FT_CONFIG_OPTION_INCREMENTAL
    FT_Incremental_InterfaceRec*  incremental_interface;
#endif

    FT_Char              no_stem_darkening;
    FT_Int32             random_seed;

#ifdef FT_CONFIG_OPTION_SUBPIXEL_RENDERING
    FT_LcdFiveTapFilter      lcd_weights;      /* filter weights, if any */
    FT_Bitmap_LcdFilterFunc  lcd_filter_func;  /* filtering callback     */
#endif

    FT_Int  refcount;

  } FT_Face_InternalRec;


  /*************************************************************************/
  /*                                                                       */
  /* <Struct>                                                              */
  /*    FT_Slot_InternalRec                                                */
  /*                                                                       */
  /* <Description>                                                         */
  /*    This structure contains the internal fields of each FT_GlyphSlot   */
  /*    object.  These fields may change between different releases of     */
  /*    FreeType.                                                          */
  /*                                                                       */
  /* <Fields>                                                              */
  /*    loader            :: The glyph loader object used to load outlines */
  /*                         into the glyph slot.                          */
  /*                                                                       */
  /*    flags             :: Possible values are zero or                   */
  /*                         FT_GLYPH_OWN_BITMAP.  The latter indicates    */
  /*                         that the FT_GlyphSlot structure owns the      */
  /*                         bitmap buffer.                                */
  /*                                                                       */
  /*    glyph_transformed :: Boolean.  Set to TRUE when the loaded glyph   */
  /*                         must be transformed through a specific        */
  /*                         font transformation.  This is _not_ the same  */
  /*                         as the face transform set through             */
  /*                         FT_Set_Transform().                           */
  /*                                                                       */
  /*    glyph_matrix      :: The 2x2 matrix corresponding to the glyph     */
  /*                         transformation, if necessary.                 */
  /*                                                                       */
  /*    glyph_delta       :: The 2d translation vector corresponding to    */
  /*                         the glyph transformation, if necessary.       */
  /*                                                                       */
  /*    glyph_hints       :: Format-specific glyph hints management.       */
  /*                                                                       */

#define FT_GLYPH_OWN_BITMAP  0x1U

  typedef struct  FT_Slot_InternalRec_
  {
    FT_GlyphLoader  loader;
    FT_UInt         flags;
    FT_Bool         glyph_transformed;
    FT_Matrix       glyph_matrix;
    FT_Vector       glyph_delta;
    void*           glyph_hints;

  } FT_GlyphSlot_InternalRec;


  /*************************************************************************/
  /*                                                                       */
  /* <Struct>                                                              */
  /*    FT_Size_InternalRec                                                */
  /*                                                                       */
  /* <Description>                                                         */
  /*    This structure contains the internal fields of each FT_Size        */
  /*    object.                                                            */
  /*                                                                       */
  /* <Fields>                                                              */
  /*    module_data      :: Data specific to a driver module.              */
  /*                                                                       */
  /*    autohint_mode    :: The used auto-hinting mode.                    */
  /*                                                                       */
  /*    autohint_metrics :: Metrics used by the auto-hinter.               */
  /*                                                                       */
  /*************************************************************************/

  typedef struct  FT_Size_InternalRec_
  {
    void*  module_data;

    FT_Render_Mode   autohint_mode;
    FT_Size_Metrics  autohint_metrics;

  } FT_Size_InternalRec;


  /*************************************************************************/
  /*************************************************************************/
  /*************************************************************************/
  /****                                                                 ****/
  /****                                                                 ****/
  /****                         M O D U L E S                           ****/
  /****                                                                 ****/
  /****                                                                 ****/
  /*************************************************************************/
  /*************************************************************************/
  /*************************************************************************/


  /*************************************************************************/
  /*                                                                       */
  /* <Struct>                                                              */
  /*    FT_ModuleRec                                                       */
  /*                                                                       */
  /* <Description>                                                         */
  /*    A module object instance.                                          */
  /*                                                                       */
  /* <Fields>                                                              */
  /*    clazz   :: A pointer to the module's class.                        */
  /*                                                                       */
  /*    library :: A handle to the parent library object.                  */
  /*                                                                       */
  /*    memory  :: A handle to the memory manager.                         */
  /*                                                                       */
  typedef struct  FT_ModuleRec_
  {
    FT_Module_Class*  clazz;
    FT_Library        library;
    FT_Memory         memory;

  } FT_ModuleRec;


  /* typecast an object to an FT_Module */
#define FT_MODULE( x )  ( (FT_Module)(x) )

#define FT_MODULE_CLASS( x )    FT_MODULE( x )->clazz
#define FT_MODULE_LIBRARY( x )  FT_MODULE( x )->library
#define FT_MODULE_MEMORY( x )   FT_MODULE( x )->memory


#define FT_MODULE_IS_DRIVER( x )  ( FT_MODULE_CLASS( x )->module_flags & \
                                    FT_MODULE_FONT_DRIVER )

#define FT_MODULE_IS_RENDERER( x )  ( FT_MODULE_CLASS( x )->module_flags & \
                                      FT_MODULE_RENDERER )

#define FT_MODULE_IS_HINTER( x )  ( FT_MODULE_CLASS( x )->module_flags & \
                                    FT_MODULE_HINTER )

#define FT_MODULE_IS_STYLER( x )  ( FT_MODULE_CLASS( x )->module_flags & \
                                    FT_MODULE_STYLER )

#define FT_DRIVER_IS_SCALABLE( x )  ( FT_MODULE_CLASS( x )->module_flags & \
                                      FT_MODULE_DRIVER_SCALABLE )

#define FT_DRIVER_USES_OUTLINES( x )  !( FT_MODULE_CLASS( x )->module_flags & \
                                         FT_MODULE_DRIVER_NO_OUTLINES )

#define FT_DRIVER_HAS_HINTER( x )  ( FT_MODULE_CLASS( x )->module_flags & \
                                     FT_MODULE_DRIVER_HAS_HINTER )

#define FT_DRIVER_HINTS_LIGHTLY( x )  ( FT_MODULE_CLASS( x )->module_flags & \
                                        FT_MODULE_DRIVER_HINTS_LIGHTLY )


  /*************************************************************************/
  /*                                                                       */
  /* <Function>                                                            */
  /*    FT_Get_Module_Interface                                            */
  /*                                                                       */
  /* <Description>                                                         */
  /*    Finds a module and returns its specific interface as a typeless    */
  /*    pointer.                                                           */
  /*                                                                       */
  /* <Input>                                                               */
  /*    library     :: A handle to the library object.                     */
  /*                                                                       */
  /*    module_name :: The module's name (as an ASCII string).             */
  /*                                                                       */
  /* <Return>                                                              */
  /*    A module-specific interface if available, 0 otherwise.             */
  /*                                                                       */
  /* <Note>                                                                */
  /*    You should better be familiar with FreeType internals to know      */
  /*    which module to look for, and what its interface is :-)            */
  /*                                                                       */
  FT_BASE( const void* )
  FT_Get_Module_Interface( FT_Library   library,
                           const char*  mod_name );

  FT_BASE( FT_Pointer )
  ft_module_get_service( FT_Module    module,
                         const char*  service_id,
                         FT_Bool      global );

#ifdef FT_CONFIG_OPTION_ENVIRONMENT_PROPERTIES
  FT_BASE( FT_Error )
  ft_property_string_set( FT_Library        library,
                          const FT_String*  module_name,
                          const FT_String*  property_name,
                          FT_String*        value );
#endif

  /* */


  /*************************************************************************/
  /*************************************************************************/
  /*************************************************************************/
  /****                                                                 ****/
  /****                                                                 ****/
  /****   F A C E,   S I Z E   &   G L Y P H   S L O T   O B J E C T S  ****/
  /****                                                                 ****/
  /****                                                                 ****/
  /*************************************************************************/
  /*************************************************************************/
  /*************************************************************************/

  /* a few macros used to perform easy typecasts with minimal brain damage */

#define FT_FACE( x )          ( (FT_Face)(x) )
#define FT_SIZE( x )          ( (FT_Size)(x) )
#define FT_SLOT( x )          ( (FT_GlyphSlot)(x) )

#define FT_FACE_DRIVER( x )   FT_FACE( x )->driver
#define FT_FACE_LIBRARY( x )  FT_FACE_DRIVER( x )->root.library
#define FT_FACE_MEMORY( x )   FT_FACE( x )->memory
#define FT_FACE_STREAM( x )   FT_FACE( x )->stream

#define FT_SIZE_FACE( x )     FT_SIZE( x )->face
#define FT_SLOT_FACE( x )     FT_SLOT( x )->face

#define FT_FACE_SLOT( x )     FT_FACE( x )->glyph
#define FT_FACE_SIZE( x )     FT_FACE( x )->size


  /*************************************************************************/
  /*                                                                       */
  /* <Function>                                                            */
  /*    FT_New_GlyphSlot                                                   */
  /*                                                                       */
  /* <Description>                                                         */
  /*    It is sometimes useful to have more than one glyph slot for a      */
  /*    given face object.  This function is used to create additional     */
  /*    slots.  All of them are automatically discarded when the face is   */
  /*    destroyed.                                                         */
  /*                                                                       */
  /* <Input>                                                               */
  /*    face  :: A handle to a parent face object.                         */
  /*                                                                       */
  /* <Output>                                                              */
  /*    aslot :: A handle to a new glyph slot object.                      */
  /*                                                                       */
  /* <Return>                                                              */
  /*    FreeType error code.  0 means success.                             */
  /*                                                                       */
  FT_BASE( FT_Error )
  FT_New_GlyphSlot( FT_Face        face,
                    FT_GlyphSlot  *aslot );


  /*************************************************************************/
  /*                                                                       */
  /* <Function>                                                            */
  /*    FT_Done_GlyphSlot                                                  */
  /*                                                                       */
  /* <Description>                                                         */
  /*    Destroys a given glyph slot.  Remember however that all slots are  */
  /*    automatically destroyed with its parent.  Using this function is   */
  /*    not always mandatory.                                              */
  /*                                                                       */
  /* <Input>                                                               */
  /*    slot :: A handle to a target glyph slot.                           */
  /*                                                                       */
  FT_BASE( void )
  FT_Done_GlyphSlot( FT_GlyphSlot  slot );

 /* */

#define FT_REQUEST_WIDTH( req )                                            \
          ( (req)->horiResolution                                          \
              ? ( (req)->width * (FT_Pos)(req)->horiResolution + 36 ) / 72 \
              : (req)->width )

#define FT_REQUEST_HEIGHT( req )                                            \
          ( (req)->vertResolution                                           \
              ? ( (req)->height * (FT_Pos)(req)->vertResolution + 36 ) / 72 \
              : (req)->height )


  /* Set the metrics according to a bitmap strike. */
  FT_BASE( void )
  FT_Select_Metrics( FT_Face   face,
                     FT_ULong  strike_index );


  /* Set the metrics according to a size request. */
  FT_BASE( void )
  FT_Request_Metrics( FT_Face          face,
                      FT_Size_Request  req );


  /* Match a size request against `available_sizes'. */
  FT_BASE( FT_Error )
  FT_Match_Size( FT_Face          face,
                 FT_Size_Request  req,
                 FT_Bool          ignore_width,
                 FT_ULong*        size_index );


  /* Use the horizontal metrics to synthesize the vertical metrics. */
  /* If `advance' is zero, it is also synthesized.                  */
  FT_BASE( void )
  ft_synthesize_vertical_metrics( FT_Glyph_Metrics*  metrics,
                                  FT_Pos             advance );


  /* Free the bitmap of a given glyphslot when needed (i.e., only when it */
  /* was allocated with ft_glyphslot_alloc_bitmap).                       */
  FT_BASE( void )
  ft_glyphslot_free_bitmap( FT_GlyphSlot  slot );


  /* Preset bitmap metrics of an outline glyphslot prior to rendering. */
  FT_BASE( void )
  ft_glyphslot_preset_bitmap( FT_GlyphSlot      slot,
                              FT_Render_Mode    mode,
                              const FT_Vector*  origin );

  /* Allocate a new bitmap buffer in a glyph slot. */
  FT_BASE( FT_Error )
  ft_glyphslot_alloc_bitmap( FT_GlyphSlot  slot,
                             FT_ULong      size );


  /* Set the bitmap buffer in a glyph slot to a given pointer.  The buffer */
  /* will not be freed by a later call to ft_glyphslot_free_bitmap.        */
  FT_BASE( void )
  ft_glyphslot_set_bitmap( FT_GlyphSlot  slot,
                           FT_Byte*      buffer );


  /*************************************************************************/
  /*************************************************************************/
  /*************************************************************************/
  /****                                                                 ****/
  /****                                                                 ****/
  /****                        R E N D E R E R S                        ****/
  /****                                                                 ****/
  /****                                                                 ****/
  /*************************************************************************/
  /*************************************************************************/
  /*************************************************************************/


#define FT_RENDERER( x )       ( (FT_Renderer)(x) )
#define FT_GLYPH( x )          ( (FT_Glyph)(x) )
#define FT_BITMAP_GLYPH( x )   ( (FT_BitmapGlyph)(x) )
#define FT_OUTLINE_GLYPH( x )  ( (FT_OutlineGlyph)(x) )


  typedef struct  FT_RendererRec_
  {
    FT_ModuleRec            root;
    FT_Renderer_Class*      clazz;
    FT_Glyph_Format         glyph_format;
    FT_Glyph_Class          glyph_class;

    FT_Raster               raster;
    FT_Raster_Render_Func   raster_render;
    FT_Renderer_RenderFunc  render;

  } FT_RendererRec;


  /*************************************************************************/
  /*************************************************************************/
  /*************************************************************************/
  /****                                                                 ****/
  /****                                                                 ****/
  /****                    F O N T   D R I V E R S                      ****/
  /****                                                                 ****/
  /****                                                                 ****/
  /*************************************************************************/
  /*************************************************************************/
  /*************************************************************************/


  /* typecast a module into a driver easily */
#define FT_DRIVER( x )  ( (FT_Driver)(x) )

  /* typecast a module as a driver, and get its driver class */
#define FT_DRIVER_CLASS( x )  FT_DRIVER( x )->clazz


  /*************************************************************************/
  /*                                                                       */
  /* <Struct>                                                              */
  /*    FT_DriverRec                                                       */
  /*                                                                       */
  /* <Description>                                                         */
  /*    The root font driver class.  A font driver is responsible for      */
  /*    managing and loading font files of a given format.                 */
  /*                                                                       */
  /*  <Fields>                                                             */
  /*     root         :: Contains the fields of the root module class.     */
  /*                                                                       */
  /*     clazz        :: A pointer to the font driver's class.  Note that  */
  /*                     this is NOT root.clazz.  `class' wasn't used      */
  /*                     as it is a reserved word in C++.                  */
  /*                                                                       */
  /*     faces_list   :: The list of faces currently opened by this        */
  /*                     driver.                                           */
  /*                                                                       */
  /*     glyph_loader :: Unused.  Used to be glyph loader for all faces    */
  /*                     managed by this driver.                           */
  /*                                                                       */
  typedef struct  FT_DriverRec_
  {
    FT_ModuleRec     root;
    FT_Driver_Class  clazz;
    FT_ListRec       faces_list;
    FT_GlyphLoader   glyph_loader;

  } FT_DriverRec;


  /*************************************************************************/
  /*************************************************************************/
  /*************************************************************************/
  /****                                                                 ****/
  /****                                                                 ****/
  /****                       L I B R A R I E S                         ****/
  /****                                                                 ****/
  /****                                                                 ****/
  /*************************************************************************/
  /*************************************************************************/
  /*************************************************************************/


  /* This hook is used by the TrueType debugger.  It must be set to an */
  /* alternate truetype bytecode interpreter function.                 */
#define FT_DEBUG_HOOK_TRUETYPE  0


  /*************************************************************************/
  /*                                                                       */
  /* <Struct>                                                              */
  /*    FT_LibraryRec                                                      */
  /*                                                                       */
  /* <Description>                                                         */
  /*    The FreeType library class.  This is the root of all FreeType      */
  /*    data.  Use FT_New_Library() to create a library object, and        */
  /*    FT_Done_Library() to discard it and all child objects.             */
  /*                                                                       */
  /* <Fields>                                                              */
  /*    memory           :: The library's memory object.  Manages memory   */
  /*                        allocation.                                    */
  /*                                                                       */
  /*    version_major    :: The major version number of the library.       */
  /*                                                                       */
  /*    version_minor    :: The minor version number of the library.       */
  /*                                                                       */
  /*    version_patch    :: The current patch level of the library.        */
  /*                                                                       */
  /*    num_modules      :: The number of modules currently registered     */
  /*                        within this library.  This is set to 0 for new */
  /*                        libraries.  New modules are added through the  */
  /*                        FT_Add_Module() API function.                  */
  /*                                                                       */
  /*    modules          :: A table used to store handles to the currently */
  /*                        registered modules. Note that each font driver */
  /*                        contains a list of its opened faces.           */
  /*                                                                       */
  /*    renderers        :: The list of renderers currently registered     */
  /*                        within the library.                            */
  /*                                                                       */
  /*    cur_renderer     :: The current outline renderer.  This is a       */
  /*                        shortcut used to avoid parsing the list on     */
  /*                        each call to FT_Outline_Render().  It is a     */
  /*                        handle to the current renderer for the         */
  /*                        FT_GLYPH_FORMAT_OUTLINE format.                */
  /*                                                                       */
  /*    auto_hinter      :: The auto-hinter module interface.              */
  /*                                                                       */
  /*    debug_hooks      :: An array of four function pointers that allow  */
  /*                        debuggers to hook into a font format's         */
  /*                        interpreter.  Currently, only the TrueType     */
  /*                        bytecode debugger uses this.                   */
  /*                                                                       */
  /*    lcd_weights      :: If subpixel rendering is activated, the LCD    */
  /*                        filter weights, if any.                        */
  /*                                                                       */
  /*    lcd_filter_func  :: If subpixel rendering is activated, the LCD    */
  /*                        filtering callback function.                   */
  /*                                                                       */
  /*    pic_container    :: Contains global structs and tables, instead    */
  /*                        of defining them globally.                     */
  /*                                                                       */
  /*    refcount         :: A counter initialized to~1 at the time an      */
  /*                        @FT_Library structure is created.              */
  /*                        @FT_Reference_Library increments this counter, */
  /*                        and @FT_Done_Library only destroys a library   */
  /*                        if the counter is~1, otherwise it simply       */
  /*                        decrements it.                                 */
  /*                                                                       */
  typedef struct  FT_LibraryRec_
  {
    FT_Memory          memory;           /* library's memory manager */

    FT_Int             version_major;
    FT_Int             version_minor;
    FT_Int             version_patch;

    FT_UInt            num_modules;
    FT_Module          modules[FT_MAX_MODULES];  /* module objects  */

    FT_ListRec         renderers;        /* list of renderers        */
    FT_Renderer        cur_renderer;     /* current outline renderer */
    FT_Module          auto_hinter;

    FT_DebugHook_Func  debug_hooks[4];

#ifdef FT_CONFIG_OPTION_SUBPIXEL_RENDERING
    FT_LcdFiveTapFilter      lcd_weights;      /* filter weights, if any */
    FT_Bitmap_LcdFilterFunc  lcd_filter_func;  /* filtering callback     */
#endif

#ifdef FT_CONFIG_OPTION_PIC
    FT_PIC_Container   pic_container;
#endif

    FT_Int             refcount;

  } FT_LibraryRec;


  FT_BASE( FT_Renderer )
  FT_Lookup_Renderer( FT_Library       library,
                      FT_Glyph_Format  format,
                      FT_ListNode*     node );

  FT_BASE( FT_Error )
  FT_Render_Glyph_Internal( FT_Library      library,
                            FT_GlyphSlot    slot,
                            FT_Render_Mode  render_mode );

  typedef const char*
  (*FT_Face_GetPostscriptNameFunc)( FT_Face  face );

  typedef FT_Error
  (*FT_Face_GetGlyphNameFunc)( FT_Face     face,
                               FT_UInt     glyph_index,
                               FT_Pointer  buffer,
                               FT_UInt     buffer_max );

  typedef FT_UInt
  (*FT_Face_GetGlyphNameIndexFunc)( FT_Face     face,
                                    FT_String*  glyph_name );


#ifndef FT_CONFIG_OPTION_NO_DEFAULT_SYSTEM

  /*************************************************************************/
  /*                                                                       */
  /* <Function>                                                            */
  /*    FT_New_Memory                                                      */
  /*                                                                       */
  /* <Description>                                                         */
  /*    Creates a new memory object.                                       */
  /*                                                                       */
  /* <Return>                                                              */
  /*    A pointer to the new memory object.  0 in case of error.           */
  /*                                                                       */
  FT_BASE( FT_Memory )
  FT_New_Memory( void );


  /*************************************************************************/
  /*                                                                       */
  /* <Function>                                                            */
  /*    FT_Done_Memory                                                     */
  /*                                                                       */
  /* <Description>                                                         */
  /*    Discards memory manager.                                           */
  /*                                                                       */
  /* <Input>                                                               */
  /*    memory :: A handle to the memory manager.                          */
  /*                                                                       */
  FT_BASE( void )
  FT_Done_Memory( FT_Memory  memory );

#endif /* !FT_CONFIG_OPTION_NO_DEFAULT_SYSTEM */


  /* Define default raster's interface.  The default raster is located in  */
  /* `src/base/ftraster.c'.                                                */
  /*                                                                       */
  /* Client applications can register new rasters through the              */
  /* FT_Set_Raster() API.                                                  */

#ifndef FT_NO_DEFAULT_RASTER
  FT_EXPORT_VAR( FT_Raster_Funcs )  ft_default_raster;
#endif


  /*************************************************************************/
  /*************************************************************************/
  /*************************************************************************/
  /****                                                                 ****/
  /****                                                                 ****/
  /****                      P I C   S U P P O R T                      ****/
  /****                                                                 ****/
  /****                                                                 ****/
  /*************************************************************************/
  /*************************************************************************/
  /*************************************************************************/


  /* PIC support macros for ftimage.h */


  /*************************************************************************/
  /*                                                                       */
  /* <Macro>                                                               */
  /*    FT_DEFINE_OUTLINE_FUNCS                                            */
  /*                                                                       */
  /* <Description>                                                         */
  /*    Used to initialize an instance of FT_Outline_Funcs struct.         */
  /*    When FT_CONFIG_OPTION_PIC is defined an init function will need    */
  /*    to be called with a pre-allocated structure to be filled.          */
  /*    When FT_CONFIG_OPTION_PIC is not defined the struct will be        */
  /*    allocated in the global scope (or the scope where the macro        */
  /*    is used).                                                          */
  /*                                                                       */
#ifndef FT_CONFIG_OPTION_PIC

#define FT_DEFINE_OUTLINE_FUNCS(           \
          class_,                          \
          move_to_,                        \
          line_to_,                        \
          conic_to_,                       \
          cubic_to_,                       \
          shift_,                          \
          delta_ )                         \
  static const  FT_Outline_Funcs class_ =  \
  {                                        \
    move_to_,                              \
    line_to_,                              \
    conic_to_,                             \
    cubic_to_,                             \
    shift_,                                \
    delta_                                 \
  };

#else /* FT_CONFIG_OPTION_PIC */

#define FT_DEFINE_OUTLINE_FUNCS(                     \
          class_,                                    \
          move_to_,                                  \
          line_to_,                                  \
          conic_to_,                                 \
          cubic_to_,                                 \
          shift_,                                    \
          delta_ )                                   \
  static FT_Error                                    \
  Init_Class_ ## class_( FT_Outline_Funcs*  clazz )  \
  {                                                  \
    clazz->move_to  = move_to_;                      \
    clazz->line_to  = line_to_;                      \
    clazz->conic_to = conic_to_;                     \
    clazz->cubic_to = cubic_to_;                     \
    clazz->shift    = shift_;                        \
    clazz->delta    = delta_;                        \
                                                     \
    return FT_Err_Ok;                                \
  }

#endif /* FT_CONFIG_OPTION_PIC */


  /*************************************************************************/
  /*                                                                       */
  /* <Macro>                                                               */
  /*    FT_DEFINE_RASTER_FUNCS                                             */
  /*                                                                       */
  /* <Description>                                                         */
  /*    Used to initialize an instance of FT_Raster_Funcs struct.          */
  /*    When FT_CONFIG_OPTION_PIC is defined an init function will need    */
  /*    to be called with a pre-allocated structure to be filled.          */
  /*    When FT_CONFIG_OPTION_PIC is not defined the struct will be        */
  /*    allocated in the global scope (or the scope where the macro        */
  /*    is used).                                                          */
  /*                                                                       */
#ifndef FT_CONFIG_OPTION_PIC

#define FT_DEFINE_RASTER_FUNCS(    \
          class_,                  \
          glyph_format_,           \
          raster_new_,             \
          raster_reset_,           \
          raster_set_mode_,        \
          raster_render_,          \
          raster_done_ )           \
  const FT_Raster_Funcs  class_ =  \
  {                                \
    glyph_format_,                 \
    raster_new_,                   \
    raster_reset_,                 \
    raster_set_mode_,              \
    raster_render_,                \
    raster_done_                   \
  };

#else /* FT_CONFIG_OPTION_PIC */

#define FT_DEFINE_RASTER_FUNCS(                        \
          class_,                                      \
          glyph_format_,                               \
          raster_new_,                                 \
          raster_reset_,                               \
          raster_set_mode_,                            \
          raster_render_,                              \
          raster_done_ )                               \
  void                                                 \
  FT_Init_Class_ ## class_( FT_Raster_Funcs*  clazz )  \
  {                                                    \
    clazz->glyph_format    = glyph_format_;            \
    clazz->raster_new      = raster_new_;              \
    clazz->raster_reset    = raster_reset_;            \
    clazz->raster_set_mode = raster_set_mode_;         \
    clazz->raster_render   = raster_render_;           \
    clazz->raster_done     = raster_done_;             \
  }

#endif /* FT_CONFIG_OPTION_PIC */


  /* PIC support macros for ftrender.h */


  /*************************************************************************/
  /*                                                                       */
  /* <Macro>                                                               */
  /*    FT_DEFINE_GLYPH                                                    */
  /*                                                                       */
  /* <Description>                                                         */
  /*    Used to initialize an instance of FT_Glyph_Class struct.           */
  /*    When FT_CONFIG_OPTION_PIC is defined an init function will need    */
  /*    to be called with a pre-allocated structure to be filled.          */
  /*    When FT_CONFIG_OPTION_PIC is not defined the struct will be        */
  /*    allocated in the global scope (or the scope where the macro        */
  /*    is used).                                                          */
  /*                                                                       */
#ifndef FT_CONFIG_OPTION_PIC

#define FT_DEFINE_GLYPH(          \
          class_,                 \
          size_,                  \
          format_,                \
          init_,                  \
          done_,                  \
          copy_,                  \
          transform_,             \
          bbox_,                  \
          prepare_ )              \
  FT_CALLBACK_TABLE_DEF           \
  const FT_Glyph_Class  class_ =  \
  {                               \
    size_,                        \
    format_,                      \
    init_,                        \
    done_,                        \
    copy_,                        \
    transform_,                   \
    bbox_,                        \
    prepare_                      \
  };

#else /* FT_CONFIG_OPTION_PIC */

#define FT_DEFINE_GLYPH(                              \
          class_,                                     \
          size_,                                      \
          format_,                                    \
          init_,                                      \
          done_,                                      \
          copy_,                                      \
          transform_,                                 \
          bbox_,                                      \
          prepare_ )                                  \
  void                                                \
  FT_Init_Class_ ## class_( FT_Glyph_Class*  clazz )  \
  {                                                   \
    clazz->glyph_size      = size_;                   \
    clazz->glyph_format    = format_;                 \
    clazz->glyph_init      = init_;                   \
    clazz->glyph_done      = done_;                   \
    clazz->glyph_copy      = copy_;                   \
    clazz->glyph_transform = transform_;              \
    clazz->glyph_bbox      = bbox_;                   \
    clazz->glyph_prepare   = prepare_;                \
  }

#endif /* FT_CONFIG_OPTION_PIC */


  /*************************************************************************/
  /*                                                                       */
  /* <Macro>                                                               */
  /*    FT_DECLARE_RENDERER                                                */
  /*                                                                       */
  /* <Description>                                                         */
  /*    Used to create a forward declaration of a                          */
  /*    FT_Renderer_Class struct instance.                                 */
  /*                                                                       */
  /* <Macro>                                                               */
  /*    FT_DEFINE_RENDERER                                                 */
  /*                                                                       */
  /* <Description>                                                         */
  /*    Used to initialize an instance of FT_Renderer_Class struct.        */
  /*                                                                       */
  /*    When FT_CONFIG_OPTION_PIC is defined a `create' function will      */
  /*    need to be called with a pointer where the allocated structure is  */
  /*    returned.  And when it is no longer needed a `destroy' function    */
  /*    needs to be called to release that allocation.                     */
  /*    `ftinit.c' (ft_create_default_module_classes) already contains     */
  /*    a mechanism to call these functions for the default modules        */
  /*    described in `ftmodule.h'.                                         */
  /*                                                                       */
  /*    Notice that the created `create' and `destroy' functions call      */
  /*    `pic_init' and `pic_free' to allow you to manually allocate and    */
  /*    initialize any additional global data, like a module specific      */
  /*    interface, and put them in the global pic container defined in     */
  /*    `ftpic.h'.  If you don't need them just implement the functions as */
  /*    empty to resolve the link error.  Also the `pic_init' and          */
  /*    `pic_free' functions should be declared in `pic.h', to be referred */
  /*    by the renderer definition calling `FT_DEFINE_RENDERER' in the     */
  /*    following.                                                         */
  /*                                                                       */
  /*    When FT_CONFIG_OPTION_PIC is not defined the struct will be        */
  /*    allocated in the global scope (or the scope where the macro        */
  /*    is used).                                                          */
  /*                                                                       */
#ifndef FT_CONFIG_OPTION_PIC

#define FT_DECLARE_RENDERER( class_ )               \
  FT_EXPORT_VAR( const FT_Renderer_Class ) class_;

#define FT_DEFINE_RENDERER(                  \
          class_,                            \
          flags_,                            \
          size_,                             \
          name_,                             \
          version_,                          \
          requires_,                         \
          interface_,                        \
          init_,                             \
          done_,                             \
          get_interface_,                    \
          glyph_format_,                     \
          render_glyph_,                     \
          transform_glyph_,                  \
          get_glyph_cbox_,                   \
          set_mode_,                         \
          raster_class_ )                    \
  FT_CALLBACK_TABLE_DEF                      \
  const FT_Renderer_Class  class_ =          \
  {                                          \
    FT_DEFINE_ROOT_MODULE( flags_,           \
                           size_,            \
                           name_,            \
                           version_,         \
                           requires_,        \
                           interface_,       \
                           init_,            \
                           done_,            \
                           get_interface_ )  \
    glyph_format_,                           \
                                             \
    render_glyph_,                           \
    transform_glyph_,                        \
    get_glyph_cbox_,                         \
    set_mode_,                               \
                                             \
    raster_class_                            \
  };

#else /* FT_CONFIG_OPTION_PIC */

#define FT_DECLARE_RENDERER( class_ )  FT_DECLARE_MODULE( class_ )

#define FT_DEFINE_RENDERER(                                      \
          class_,                                                \
          flags_,                                                \
          size_,                                                 \
          name_,                                                 \
          version_,                                              \
          requires_,                                             \
          interface_,                                            \
          init_,                                                 \
          done_,                                                 \
          get_interface_,                                        \
          glyph_format_,                                         \
          render_glyph_,                                         \
          transform_glyph_,                                      \
          get_glyph_cbox_,                                       \
          set_mode_,                                             \
          raster_class_ )                                        \
  void                                                           \
  FT_Destroy_Class_ ## class_( FT_Library        library,        \
                               FT_Module_Class*  clazz )         \
  {                                                              \
    FT_Renderer_Class*  rclazz = (FT_Renderer_Class*)clazz;      \
    FT_Memory           memory = library->memory;                \
                                                                 \
                                                                 \
    class_ ## _pic_free( library );                              \
    if ( rclazz )                                                \
      FT_FREE( rclazz );                                         \
  }                                                              \
                                                                 \
                                                                 \
  FT_Error                                                       \
  FT_Create_Class_ ## class_( FT_Library         library,        \
                              FT_Module_Class**  output_class )  \
  {                                                              \
    FT_Renderer_Class*  clazz = NULL;                            \
    FT_Error            error;                                   \
    FT_Memory           memory = library->memory;                \
                                                                 \
                                                                 \
    if ( FT_ALLOC( clazz, sizeof ( *clazz ) ) )                  \
      return error;                                              \
                                                                 \
    error = class_ ## _pic_init( library );                      \
    if ( error )                                                 \
    {                                                            \
      FT_FREE( clazz );                                          \
      return error;                                              \
    }                                                            \
                                                                 \
    FT_DEFINE_ROOT_MODULE( flags_,                               \
                           size_,                                \
                           name_,                                \
                           version_,                             \
                           requires_,                            \
                           interface_,                           \
                           init_,                                \
                           done_,                                \
                           get_interface_ )                      \
                                                                 \
    clazz->glyph_format    = glyph_format_;                      \
                                                                 \
    clazz->render_glyph    = render_glyph_;                      \
    clazz->transform_glyph = transform_glyph_;                   \
    clazz->get_glyph_cbox  = get_glyph_cbox_;                    \
    clazz->set_mode        = set_mode_;                          \
                                                                 \
    clazz->raster_class    = raster_class_;                      \
                                                                 \
    *output_class = (FT_Module_Class*)clazz;                     \
                                                                 \
    return FT_Err_Ok;                                            \
  }

#endif /* FT_CONFIG_OPTION_PIC */


  /* PIC support macros for ftmodapi.h **/


#ifdef FT_CONFIG_OPTION_PIC

  /*************************************************************************/
  /*                                                                       */
  /* <FuncType>                                                            */
  /*    FT_Module_Creator                                                  */
  /*                                                                       */
  /* <Description>                                                         */
  /*    A function used to create (allocate) a new module class object.    */
  /*    The object's members are initialized, but the module itself is     */
  /*    not.                                                               */
  /*                                                                       */
  /* <Input>                                                               */
  /*    memory       :: A handle to the memory manager.                    */
  /*    output_class :: Initialized with the newly allocated class.        */
  /*                                                                       */
  typedef FT_Error
  (*FT_Module_Creator)( FT_Memory          memory,
                        FT_Module_Class**  output_class );

  /*************************************************************************/
  /*                                                                       */
  /* <FuncType>                                                            */
  /*    FT_Module_Destroyer                                                */
  /*                                                                       */
  /* <Description>                                                         */
  /*    A function used to destroy (deallocate) a module class object.     */
  /*                                                                       */
  /* <Input>                                                               */
  /*    memory :: A handle to the memory manager.                          */
  /*    clazz  :: Module class to destroy.                                 */
  /*                                                                       */
  typedef void
  (*FT_Module_Destroyer)( FT_Memory         memory,
                          FT_Module_Class*  clazz );

#endif


  /*************************************************************************/
  /*                                                                       */
  /* <Macro>                                                               */
  /*    FT_DECLARE_MODULE                                                  */
  /*                                                                       */
  /* <Description>                                                         */
  /*    Used to create a forward declaration of a                          */
  /*    FT_Module_Class struct instance.                                   */
  /*                                                                       */
  /* <Macro>                                                               */
  /*    FT_DEFINE_MODULE                                                   */
  /*                                                                       */
  /* <Description>                                                         */
  /*    Used to initialize an instance of an FT_Module_Class struct.       */
  /*                                                                       */
  /*    When FT_CONFIG_OPTION_PIC is defined a `create' function needs     */
  /*    to be called with a pointer where the allocated structure is       */
  /*    returned.  And when it is no longer needed a `destroy' function    */
  /*    needs to be called to release that allocation.                     */
  /*    `ftinit.c' (ft_create_default_module_classes) already contains     */
  /*    a mechanism to call these functions for the default modules        */
  /*    described in `ftmodule.h'.                                         */
  /*                                                                       */
  /*    Notice that the created `create' and `destroy' functions call      */
  /*    `pic_init' and `pic_free' to allow you to manually allocate and    */
  /*    initialize any additional global data, like a module specific      */
  /*    interface, and put them in the global pic container defined in     */
  /*    `ftpic.h'.  If you don't need them just implement the functions as */
  /*    empty to resolve the link error.  Also the `pic_init' and          */
  /*    `pic_free' functions should be declared in `pic.h', to be referred */
  /*    by the module definition calling `FT_DEFINE_MODULE' in the         */
  /*    following.                                                         */
  /*                                                                       */
  /*    When FT_CONFIG_OPTION_PIC is not defined the struct will be        */
  /*    allocated in the global scope (or the scope where the macro        */
  /*    is used).                                                          */
  /*                                                                       */
  /* <Macro>                                                               */
  /*    FT_DEFINE_ROOT_MODULE                                              */
  /*                                                                       */
  /* <Description>                                                         */
  /*    Used to initialize an instance of an FT_Module_Class struct inside */
  /*    another struct that contains it or in a function that initializes  */
  /*    that containing struct.                                            */
  /*                                                                       */
#ifndef FT_CONFIG_OPTION_PIC

#define FT_DECLARE_MODULE( class_ )  \
  FT_CALLBACK_TABLE                  \
  const FT_Module_Class  class_;

#define FT_DEFINE_ROOT_MODULE(  \
          flags_,               \
          size_,                \
          name_,                \
          version_,             \
          requires_,            \
          interface_,           \
          init_,                \
          done_,                \
          get_interface_ )      \
  {                             \
    flags_,                     \
    size_,                      \
                                \
    name_,                      \
    version_,                   \
    requires_,                  \
                                \
    interface_,                 \
                                \
    init_,                      \
    done_,                      \
    get_interface_,             \
  },

#define FT_DEFINE_MODULE(         \
          class_,                 \
          flags_,                 \
          size_,                  \
          name_,                  \
          version_,               \
          requires_,              \
          interface_,             \
          init_,                  \
          done_,                  \
          get_interface_ )        \
  FT_CALLBACK_TABLE_DEF           \
  const FT_Module_Class class_ =  \
  {                               \
    flags_,                       \
    size_,                        \
                                  \
    name_,                        \
    version_,                     \
    requires_,                    \
                                  \
    interface_,                   \
                                  \
    init_,                        \
    done_,                        \
    get_interface_,               \
  };


#else /* FT_CONFIG_OPTION_PIC */

#define FT_DECLARE_MODULE( class_ )                               \
  FT_Error                                                        \
  FT_Create_Class_ ## class_( FT_Library         library,         \
                              FT_Module_Class**  output_class );  \
  void                                                            \
  FT_Destroy_Class_ ## class_( FT_Library        library,         \
                               FT_Module_Class*  clazz );

#define FT_DEFINE_ROOT_MODULE(                      \
          flags_,                                   \
          size_,                                    \
          name_,                                    \
          version_,                                 \
          requires_,                                \
          interface_,                               \
          init_,                                    \
          done_,                                    \
          get_interface_ )                          \
    clazz->root.module_flags     = flags_;          \
    clazz->root.module_size      = size_;           \
    clazz->root.module_name      = name_;           \
    clazz->root.module_version   = version_;        \
    clazz->root.module_requires  = requires_;       \
                                                    \
    clazz->root.module_interface = interface_;      \
                                                    \
    clazz->root.module_init      = init_;           \
    clazz->root.module_done      = done_;           \
    clazz->root.get_interface    = get_interface_;

#define FT_DEFINE_MODULE(                                        \
          class_,                                                \
          flags_,                                                \
          size_,                                                 \
          name_,                                                 \
          version_,                                              \
          requires_,                                             \
          interface_,                                            \
          init_,                                                 \
          done_,                                                 \
          get_interface_ )                                       \
  void                                                           \
  FT_Destroy_Class_ ## class_( FT_Library        library,        \
                               FT_Module_Class*  clazz )         \
  {                                                              \
    FT_Memory memory = library->memory;                          \
                                                                 \
                                                                 \
    class_ ## _pic_free( library );                              \
    if ( clazz )                                                 \
      FT_FREE( clazz );                                          \
  }                                                              \
                                                                 \
                                                                 \
  FT_Error                                                       \
  FT_Create_Class_ ## class_( FT_Library         library,        \
                              FT_Module_Class**  output_class )  \
  {                                                              \
    FT_Memory         memory = library->memory;                  \
    FT_Module_Class*  clazz  = NULL;                             \
    FT_Error          error;                                     \
                                                                 \
                                                                 \
    if ( FT_ALLOC( clazz, sizeof ( *clazz ) ) )                  \
      return error;                                              \
    error = class_ ## _pic_init( library );                      \
    if ( error )                                                 \
    {                                                            \
      FT_FREE( clazz );                                          \
      return error;                                              \
    }                                                            \
                                                                 \
    clazz->module_flags     = flags_;                            \
    clazz->module_size      = size_;                             \
    clazz->module_name      = name_;                             \
    clazz->module_version   = version_;                          \
    clazz->module_requires  = requires_;                         \
                                                                 \
    clazz->module_interface = interface_;                        \
                                                                 \
    clazz->module_init      = init_;                             \
    clazz->module_done      = done_;                             \
    clazz->get_interface    = get_interface_;                    \
                                                                 \
    *output_class = clazz;                                       \
                                                                 \
    return FT_Err_Ok;                                            \
  }

#endif /* FT_CONFIG_OPTION_PIC */


FT_END_HEADER

#endif /* FTOBJS_H_ */


/* END */