freetype.h

Trolltech公司发布的基于C++图形开发环境

    FT_Generic        autohint;
    void*             extensions;

    FT_Face_Internal  internal;

    /*@private end */

  } FT_FaceRec;


  /*************************************************************************/
  /*                                                                       */
  /* <Constant>                                                            */
  /*    FT_FACE_FLAG_SCALABLE                                              */
  /*                                                                       */
  /* <Description>                                                         */
  /*    A bit-field constant, used to indicate that a given face provides  */
  /*    vectorial outlines (i.e., TrueType or Type1).  This doesn't        */
  /*    prevent embedding of bitmap strikes though, i.e., a given face can */
  /*    have both this bit set, and a `num_fixed_sizes' property > 0.      */
  /*                                                                       */
#define FT_FACE_FLAG_SCALABLE  1


  /*************************************************************************/
  /*                                                                       */
  /* <Constant>                                                            */
  /*    FT_FACE_FLAG_FIXED_SIZES                                           */
  /*                                                                       */
  /* <Description>                                                         */
  /*    A bit-field constant, used to indicate that a given face contains  */
  /*    `fixed sizes', i.e., bitmap strikes for some given pixel sizes.    */
  /*    See the `num_fixed_sizes' and `available_sizes' face properties    */
  /*    for more information.                                              */
  /*                                                                       */
#define FT_FACE_FLAG_FIXED_SIZES  2


  /*************************************************************************/
  /*                                                                       */
  /* <Constant>                                                            */
  /*    FT_FACE_FLAG_FIXED_WIDTH                                           */
  /*                                                                       */
  /* <Description>                                                         */
  /*    A bit-field constant, used to indicate that a given face contains  */
  /*    fixed-width characters (like Courier, Lucida, MonoType, etc.).     */
  /*                                                                       */
#define FT_FACE_FLAG_FIXED_WIDTH  4


  /*************************************************************************/
  /*                                                                       */
  /* <Constant>                                                            */
  /*    FT_FACE_FLAG_SFNT                                                  */
  /*                                                                       */
  /* <Description>                                                         */
  /*    A bit-field constant, used to indicate that a given face uses the  */
  /*    `sfnt' storage fomat.  For now, this means TrueType or OpenType.   */
  /*                                                                       */
#define FT_FACE_FLAG_SFNT  8


  /*************************************************************************/
  /*                                                                       */
  /* <Constant>                                                            */
  /*    FT_FACE_FLAG_HORIZONTAL                                            */
  /*                                                                       */
  /* <Description>                                                         */
  /*    A bit-field constant, used to indicate that a given face contains  */
  /*    horizontal glyph metrics.  This should be set for all common       */
  /*    formats, but who knows.                                            */
  /*                                                                       */
#define FT_FACE_FLAG_HORIZONTAL  0x10


  /*************************************************************************/
  /*                                                                       */
  /* <Constant>                                                            */
  /*    FT_FACE_FLAG_VERTICAL                                              */
  /*                                                                       */
  /* <Description>                                                         */
  /*    A bit-field constant, used to indicate that a given face contains  */
  /*    vertical glyph metrics.  If not set, the glyph loader will         */
  /*    synthetize vertical metrics itself to help display vertical text   */
  /*    correctly.                                                         */
  /*                                                                       */
#define FT_FACE_FLAG_VERTICAL  0x20


  /*************************************************************************/
  /*                                                                       */
  /* <Constant>                                                            */
  /*    FT_FACE_FLAG_KERNING                                               */
  /*                                                                       */
  /* <Description>                                                         */
  /*    A bit-field constant, used to indicate that a given face contains  */
  /*    kerning information.  When set, this information can be retrieved  */
  /*    through the function FT_Get_Kerning().  Note that when unset, this */
  /*    function will always return the kerning vector (0,0).              */
  /*                                                                       */
#define FT_FACE_FLAG_KERNING  0x40


  /*************************************************************************/
  /*                                                                       */
  /* <Constant>                                                            */
  /*    FT_FACE_FLAG_FAST_GLYPHS                                           */
  /*                                                                       */
  /* <Description>                                                         */
  /*    A bit-field constant, used to indicate that the glyphs in a given  */
  /*    font can be retrieved very quickly, and that a glyph cache is thus */
  /*    not necessary for any of its child size objects.                   */
  /*                                                                       */
  /*    This flag should really be set for fixed-size formats like FNT,    */
  /*    where each glyph bitmap is available directly in binary form       */
  /*    without any kind of compression.                                   */
  /*                                                                       */
#define FT_FACE_FLAG_FAST_GLYPHS  0x80


  /*************************************************************************/
  /*                                                                       */
  /* <Constant>                                                            */
  /*    FT_FACE_FLAG_MULTIPLE_MASTERS                                      */
  /*                                                                       */
  /* <Description>                                                         */
  /*    A bit-field constant, used to indicate that the font contains      */
  /*    multiple masters and is capable of interpolating between them.     */
  /*                                                                       */
#define FT_FACE_FLAG_MULTIPLE_MASTERS  0x100


  /*************************************************************************/
  /*                                                                       */
  /* <Constant>                                                            */
  /*    FT_FACE_FLAG_GLYPH_NAMES                                           */
  /*                                                                       */
  /* <Description>                                                         */
  /*    A bit-field constant, used to indicate that the font contains      */
  /*    glyph names that can be retrieved through FT_Get_Glyph_Name().     */
  /*                                                                       */
#define FT_FACE_FLAG_GLYPH_NAMES       0x200


  /*************************************************************************/
  /*                                                                       */
  /* <Constant>                                                            */
  /*    FT_FACE_FLAG_EXTERNAL_STREAM                                       */
  /*                                                                       */
  /* <Description>                                                         */
  /*    This bit field is used internally by FreeType to indicate that     */
  /*    a face's stream was provided by the client application and should  */
  /*    not be destroyed by FT_Done_Face().                                */
  /*                                                                       */
#define FT_FACE_FLAG_EXTERNAL_STREAM   0x4000

  /* */

#define FT_HAS_HORIZONTAL( face ) \
          ( face->face_flags & FT_FACE_FLAG_HORIZONTAL )

#define FT_HAS_VERTICAL( face ) \
          ( face->face_flags & FT_FACE_FLAG_VERTICAL )

#define FT_HAS_KERNING( face ) \
          ( face->face_flags & FT_FACE_FLAG_KERNING )

#define FT_IS_SCALABLE( face ) \
          ( face->face_flags & FT_FACE_FLAG_SCALABLE )

#define FT_IS_SFNT( face ) \
          ( face->face_flags & FT_FACE_FLAG_SFNT )

#define FT_IS_FIXED_WIDTH( face ) \
          ( face->face_flags & FT_FACE_FLAG_FIXED_WIDTH )

#define FT_HAS_FIXED_SIZES( face ) \
          ( face->face_flags & FT_FACE_FLAG_FIXED_SIZES )

#define FT_HAS_FAST_GLYPHS( face ) \
          ( face->face_flags & FT_FACE_FLAG_FAST_GLYPHS )

#define FT_HAS_GLYPH_NAMES( face ) \
          ( face->face_flags & FT_FACE_FLAG_GLYPH_NAMES )

#define FT_HAS_MULTIPLE_MASTERS( face ) \
          ( face->face_flags & FT_FACE_FLAG_MULTIPLE_MASTERS )


  /*************************************************************************/
  /*                                                                       */
  /* <Constant>                                                            */
  /*    FT_STYLE_FLAG_ITALIC                                               */
  /*                                                                       */
  /* <Description>                                                         */
  /*    A bit-field constant, used to indicate that a given face is        */
  /*    italicized.                                                        */
  /*                                                                       */
#define FT_STYLE_FLAG_ITALIC  1


  /*************************************************************************/
  /*                                                                       */
  /* <Constant>                                                            */
  /*    FT_STYLE_FLAG_BOLD                                                 */
  /*                                                                       */
  /* <Description>                                                         */
  /*    A bit-field constant, used to indicate that a given face is        */
  /*    emboldened.                                                        */