t1tables.h

下载来的一个看图软件的源代码

/***************************************************************************/
/*                                                                         */
/*  t1tables.h                                                             */
/*                                                                         */
/*    Basic Type 1/Type 2 tables definitions and interface (specification  */
/*    only).                                                               */
/*                                                                         */
/*  Copyright 1996-2001, 2002, 2003 by                                     */
/*  David Turner, Robert Wilhelm, and Werner Lemberg.                      */
/*                                                                         */
/*  This file is part of the FreeType project, and may only be used,       */
/*  modified, and distributed under the terms of the FreeType project      */
/*  license, LICENSE.TXT.  By continuing to use, modify, or distribute     */
/*  this file you indicate that you have read the license and              */
/*  understand and accept it fully.                                        */
/*                                                                         */
/***************************************************************************/


#ifndef __T1TABLES_H__
#define __T1TABLES_H__


#include <ft2build.h>
#include FT_FREETYPE_H


FT_BEGIN_HEADER


  /*************************************************************************/
  /*                                                                       */
  /* <Section>                                                             */
  /*    type1_tables                                                       */
  /*                                                                       */
  /* <Title>                                                               */
  /*    Type 1 Tables                                                      */
  /*                                                                       */
  /* <Abstract>                                                            */
  /*    Type 1 (PostScript) specific font tables.                          */
  /*                                                                       */
  /* <Description>                                                         */
  /*    This section contains the definition of Type 1-specific tables,    */
  /*    including structures related to other PostScript font formats.     */
  /*                                                                       */
  /*************************************************************************/


  /* Note that we separate font data in PS_FontInfoRec and PS_PrivateRec */
  /* structures in order to support Multiple Master fonts.               */


  /*************************************************************************/
  /*                                                                       */
  /* <Struct>                                                              */
  /*    PS_FontInfoRec                                                     */
  /*                                                                       */
  /* <Description>                                                         */
  /*    A structure used to model a Type1/Type2 FontInfo dictionary.  Note */
  /*    that for Multiple Master fonts, each instance has its own          */
  /*    FontInfo.                                                          */
  /*                                                                       */
  typedef struct  PS_FontInfoRec
  {
    FT_String*  version;
    FT_String*  notice;
    FT_String*  full_name;
    FT_String*  family_name;
    FT_String*  weight;
    FT_Long     italic_angle;
    FT_Bool     is_fixed_pitch;
    FT_Short    underline_position;
    FT_UShort   underline_thickness;

  } PS_FontInfoRec, *PS_FontInfo;


  /*************************************************************************/
  /*                                                                       */
  /* <Struct>                                                              */
  /*    T1_FontInfo                                                        */
  /*                                                                       */
  /* <Description>                                                         */
  /*    This type is equivalent to @PS_FontInfoRec.  It is deprecated but  */
  /*    kept to maintain source compatibility between various versions of  */
  /*    FreeType.                                                          */
  /*                                                                       */
  typedef PS_FontInfoRec  T1_FontInfo;


  /*************************************************************************/
  /*                                                                       */
  /* <Struct>                                                              */
  /*    PS_PrivateRec                                                      */
  /*                                                                       */
  /* <Description>                                                         */
  /*    A structure used to model a Type1/Type2 private dictionary.  Note  */
  /*    that for Multiple Master fonts, each instance has its own Private  */
  /*    dictionary.                                                        */
  /*                                                                       */
  typedef struct  PS_PrivateRec_
  {
    FT_Int     unique_id;
    FT_Int     lenIV;

    FT_Byte    num_blue_values;
    FT_Byte    num_other_blues;
    FT_Byte    num_family_blues;
    FT_Byte    num_family_other_blues;

    FT_Short   blue_values[14];
    FT_Short   other_blues[10];

    FT_Short   family_blues      [14];
    FT_Short   family_other_blues[10];

    FT_Fixed   blue_scale;
    FT_Int     blue_shift;
    FT_Int     blue_fuzz;

    FT_UShort  standard_width[1];
    FT_UShort  standard_height[1];

    FT_Byte    num_snap_widths;
    FT_Byte    num_snap_heights;
    FT_Bool    force_bold;
    FT_Bool    round_stem_up;

    FT_Short   snap_widths [13];  /* including std width  */
    FT_Short   snap_heights[13];  /* including std height */

    FT_Long    language_group;
    FT_Long    password;

    FT_Short   min_feature[2];

  } PS_PrivateRec, *PS_Private;


  /*************************************************************************/
  /*                                                                       */
  /* <Struct>                                                              */
  /*    T1_Private                                                         */
  /*                                                                       */
  /* <Description>                                                         */
  /*   This type is equivalent to @PS_PrivateRec.  It is deprecated but    */
  /*   kept to maintain source compatibility between various versions of   */
  /*   FreeType.                                                           */
  /*                                                                       */
  typedef PS_PrivateRec  T1_Private;


  /*************************************************************************/
  /*                                                                       */
  /* <Enum>                                                                */
  /*    T1_Blend_Flags                                                     */
  /*                                                                       */
  /* <Description>                                                         */
  /*    A set of flags used to indicate which fields are present in a      */
  /*    given blen dictionary (font info or private).  Used to support     */
  /*    Multiple Masters fonts.                                            */
  /*                                                                       */
  typedef enum
  {
    /*# required fields in a FontInfo blend dictionary */
    T1_BLEND_UNDERLINE_POSITION = 0,
    T1_BLEND_UNDERLINE_THICKNESS,
    T1_BLEND_ITALIC_ANGLE,

    /*# required fields in a Private blend dictionary */
    T1_BLEND_BLUE_VALUES,
    T1_BLEND_OTHER_BLUES,
    T1_BLEND_STANDARD_WIDTH,
    T1_BLEND_STANDARD_HEIGHT,
    T1_BLEND_STEM_SNAP_WIDTHS,
    T1_BLEND_STEM_SNAP_HEIGHTS,
    T1_BLEND_BLUE_SCALE,
    T1_BLEND_BLUE_SHIFT,
    T1_BLEND_FAMILY_BLUES,
    T1_BLEND_FAMILY_OTHER_BLUES,
    T1_BLEND_FORCE_BOLD,

    /*# never remove */
    T1_BLEND_MAX

  } T1_Blend_Flags;


  /*# backwards compatible definitions */
#define t1_blend_underline_position   T1_BLEND_UNDERLINE_POSITION
#define t1_blend_underline_thickness  T1_BLEND_UNDERLINE_THICKNESS
#define t1_blend_italic_angle         T1_BLEND_ITALIC_ANGLE
#define t1_blend_blue_values          T1_BLEND_BLUE_VALUES
#define t1_blend_other_blues          T1_BLEND_OTHER_BLUES
#define t1_blend_standard_widths      T1_BLEND_STANDARD_WIDTH
#define t1_blend_standard_height      T1_BLEND_STANDARD_HEIGHT
#define t1_blend_stem_snap_widths     T1_BLEND_STEM_SNAP_WIDTHS
#define t1_blend_stem_snap_heights    T1_BLEND_STEM_SNAP_HEIGHTS
#define t1_blend_blue_scale           T1_BLEND_BLUE_SCALE
#define t1_blend_blue_shift           T1_BLEND_BLUE_SHIFT
#define t1_blend_family_blues         T1_BLEND_FAMILY_BLUES
#define t1_blend_family_other_blues   T1_BLEND_FAMILY_OTHER_BLUES
#define t1_blend_force_bold           T1_BLEND_FORCE_BOLD
#define t1_blend_max                  T1_BLEND_MAX


  /* maximum number of Multiple Masters designs, as defined in the spec */
#define T1_MAX_MM_DESIGNS     16

  /* maximum number of Multiple Masters axes, as defined in the spec */
#define T1_MAX_MM_AXIS        4

  /* maximum number of elements in a design map */
#define T1_MAX_MM_MAP_POINTS  20


  /* this structure is used to store the BlendDesignMap entry for an axis */
  typedef struct  PS_DesignMap_
  {
    FT_Byte    num_points;
    FT_Fixed*  design_points;
    FT_Fixed*  blend_points;

  } PS_DesignMapRec, *PS_DesignMap;

  /* backwards-compatible definition */
  typedef PS_DesignMapRec  T1_DesignMap;


  typedef struct  PS_BlendRec_
  {
    FT_UInt          num_designs;
    FT_UInt          num_axis;

    FT_String*       axis_names[T1_MAX_MM_AXIS];
    FT_Fixed*        design_pos[T1_MAX_MM_DESIGNS];
    PS_DesignMapRec  design_map[T1_MAX_MM_AXIS];

    FT_Fixed*        weight_vector;
    FT_Fixed*        default_weight_vector;

    PS_FontInfo      font_infos[T1_MAX_MM_DESIGNS + 1];
    PS_Private       privates  [T1_MAX_MM_DESIGNS + 1];

    FT_ULong         blend_bitflags;

    FT_BBox*         bboxes    [T1_MAX_MM_DESIGNS + 1];

  } PS_BlendRec, *PS_Blend;


  /* backwards-compatible definition */
  typedef PS_BlendRec  T1_Blend;


  typedef struct  CID_FaceDictRec_
  {
    PS_PrivateRec  private_dict;

    FT_UInt        len_buildchar;
    FT_Fixed       forcebold_threshold;
    FT_Pos         stroke_width;
    FT_Fixed       expansion_factor;

    FT_Byte        paint_type;
    FT_Byte        font_type;
    FT_Matrix      font_matrix;
    FT_Vector      font_offset;

    FT_UInt        num_subrs;
    FT_ULong       subrmap_offset;
    FT_Int         sd_bytes;

  } CID_FaceDictRec, *CID_FaceDict;


  /* backwards-compatible definition */
  typedef CID_FaceDictRec  CID_FontDict;


  typedef struct  CID_FaceInfoRec_
  {
    FT_String*      cid_font_name;
    FT_Fixed        cid_version;
    FT_Int          cid_font_type;

    FT_String*      registry;
    FT_String*      ordering;
    FT_Int          supplement;

    PS_FontInfoRec  font_info;
    FT_BBox         font_bbox;
    FT_ULong        uid_base;

    FT_Int          num_xuid;
    FT_ULong        xuid[16];

    FT_ULong        cidmap_offset;
    FT_Int          fd_bytes;
    FT_Int          gd_bytes;
    FT_ULong        cid_count;

    FT_Int          num_dicts;
    CID_FaceDict    font_dicts;

    FT_ULong        data_offset;

  } CID_FaceInfoRec, *CID_FaceInfo;


  /*************************************************************************/
  /*                                                                       */
  /* <Struct>                                                              */
  /*    CID_Info                                                           */
  /*                                                                       */
  /* <Description>                                                         */
  /*   This type is equivalent to CID_FaceInfoRec.  It is deprecated but   */
  /*   kept to maintain source compatibility between various versions of   */
  /*   FreeType.                                                           */
  /*                                                                       */
  typedef CID_FaceInfoRec  CID_Info;

  /* */


 /************************************************************************
  *
  * @function:
  *    FT_Has_PS_Glyph_Names
  *
  * @description:
  *    Return true if a given face provides reliable Postscript glyph
  *    names.  This is similar to using the @FT_HAS_GLYPH_NAMES macro,
  *    except that certain fonts (mostly TrueType) contain incorrect
  *    glyph name tables.
  *
  *    When this function returns true, the caller is sure that the glyph
  *    names returned by @FT_Get_Glyph_Name are reliable.
  *
  * @input:
  *    face ::
  *       face handle
  *
  * @return:
  *    Boolean.  True if glyph names are reliable.
  */
  FT_EXPORT( FT_Int )
  FT_Has_PS_Glyph_Names( FT_Face  face );


 /************************************************************************
  *
  * @function:
  *    FT_Get_PS_Font_Info
  *
  * @description:
  *    Retrieve the @PS_FontInfoRec structure corresponding to a given
  *    Postscript font.
  *
  * @input:
  *    face ::
  *       Postscript face handle.
  *
  * @output:
  *    afont_info ::
  *       Output font info structure pointer.
  *
  * @return:
  *    FreeType error code.  0 means success.
  *
  * @note:
  *    The string pointers within the font info structure are owned by
  *    the face and don't need to be freed by the caller.
  *
  *    If the font's format is not Postscript-based, this function will
  *    return the FT_Err_Invalid_Argument error code.
  */
  FT_EXPORT( FT_Error )
  FT_Get_PS_Font_Info( FT_Face          face,
                       PS_FontInfoRec  *afont_info );

 /* */



FT_END_HEADER

#endif /* __T1TABLES_H__ */


/* END */