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Edit File: ftwinfnt.h

/****************************************************************************
 *
 * ftwinfnt.h
 *
 *   FreeType API for accessing Windows fnt-specific data.
 *
 * Copyright (C) 2003-2021 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 FTWINFNT_H_
#define FTWINFNT_H_

#include <freetype/freetype.h>

#ifdef FREETYPE_H
#error "freetype.h of FreeType 1 has been loaded!"
#error "Please fix the directory search order for header files"
#error "so that freetype.h of FreeType 2 is found first."
#endif

FT_BEGIN_HEADER

/**************************************************************************
   *
   * @section:
   *   winfnt_fonts
   *
   * @title:
   *   Window FNT Files
   *
   * @abstract:
   *   Windows FNT-specific API.
   *
   * @description:
   *   This section contains the declaration of Windows FNT-specific
   *   functions.
   *
   */

/**************************************************************************
   *
   * @enum:
   *   FT_WinFNT_ID_XXX
   *
   * @description:
   *   A list of valid values for the `charset` byte in @FT_WinFNT_HeaderRec.
   *   Exact mapping tables for the various 'cpXXXX' encodings (except for
   *   'cp1361') can be found at 'ftp://ftp.unicode.org/Public/' in the
   *   `MAPPINGS/VENDORS/MICSFT/WINDOWS` subdirectory.  'cp1361' is roughly a
   *   superset of `MAPPINGS/OBSOLETE/EASTASIA/KSC/JOHAB.TXT`.
   *
   * @values:
   *   FT_WinFNT_ID_DEFAULT ::
   *     This is used for font enumeration and font creation as a 'don't
   *     care' value.  Valid font files don't contain this value.  When
   *     querying for information about the character set of the font that is
   *     currently selected into a specified device context, this return
   *     value (of the related Windows API) simply denotes failure.
   *
   *   FT_WinFNT_ID_SYMBOL ::
   *     There is no known mapping table available.
   *
   *   FT_WinFNT_ID_MAC ::
   *     Mac Roman encoding.
   *
   *   FT_WinFNT_ID_OEM ::
   *     From Michael Poettgen <michael@poettgen.de>:
   *
   *     The 'Windows Font Mapping' article says that `FT_WinFNT_ID_OEM` is
   *     used for the charset of vector fonts, like `modern.fon`,
   *     `roman.fon`, and `script.fon` on Windows.
   *
   *     The 'CreateFont' documentation says: The `FT_WinFNT_ID_OEM` value
   *     specifies a character set that is operating-system dependent.
   *
   *     The 'IFIMETRICS' documentation from the 'Windows Driver Development
   *     Kit' says: This font supports an OEM-specific character set.  The
   *     OEM character set is system dependent.
   *
   *     In general OEM, as opposed to ANSI (i.e., 'cp1252'), denotes the
   *     second default codepage that most international versions of Windows
   *     have.  It is one of the OEM codepages from
   *
   *     https://docs.microsoft.com/en-us/windows/desktop/intl/code-page-identifiers
   *     ,
   *
   *     and is used for the 'DOS boxes', to support legacy applications.  A
   *     German Windows version for example usually uses ANSI codepage 1252
   *     and OEM codepage 850.
   *
   *   FT_WinFNT_ID_CP874 ::
   *     A superset of Thai TIS 620 and ISO 8859-11.
   *
   *   FT_WinFNT_ID_CP932 ::
   *     A superset of Japanese Shift-JIS (with minor deviations).
   *
   *   FT_WinFNT_ID_CP936 ::
   *     A superset of simplified Chinese GB 2312-1980 (with different
   *     ordering and minor deviations).
   *
   *   FT_WinFNT_ID_CP949 ::
   *     A superset of Korean Hangul KS~C 5601-1987 (with different ordering
   *     and minor deviations).
   *
   *   FT_WinFNT_ID_CP950 ::
   *     A superset of traditional Chinese Big~5 ETen (with different
   *     ordering and minor deviations).
   *
   *   FT_WinFNT_ID_CP1250 ::
   *     A superset of East European ISO 8859-2 (with slightly different
   *     ordering).
   *
   *   FT_WinFNT_ID_CP1251 ::
   *     A superset of Russian ISO 8859-5 (with different ordering).
   *
   *   FT_WinFNT_ID_CP1252 ::
   *     ANSI encoding.  A superset of ISO 8859-1.
   *
   *   FT_WinFNT_ID_CP1253 ::
   *     A superset of Greek ISO 8859-7 (with minor modifications).
   *
   *   FT_WinFNT_ID_CP1254 ::
   *     A superset of Turkish ISO 8859-9.
   *
   *   FT_WinFNT_ID_CP1255 ::
   *     A superset of Hebrew ISO 8859-8 (with some modifications).
   *
   *   FT_WinFNT_ID_CP1256 ::
   *     A superset of Arabic ISO 8859-6 (with different ordering).
   *
   *   FT_WinFNT_ID_CP1257 ::
   *     A superset of Baltic ISO 8859-13 (with some deviations).
   *
   *   FT_WinFNT_ID_CP1258 ::
   *     For Vietnamese.  This encoding doesn't cover all necessary
   *     characters.
   *
   *   FT_WinFNT_ID_CP1361 ::
   *     Korean (Johab).
   */

#define FT_WinFNT_ID_CP1252    0
#define FT_WinFNT_ID_DEFAULT   1
#define FT_WinFNT_ID_SYMBOL    2
#define FT_WinFNT_ID_MAC      77
#define FT_WinFNT_ID_CP932   128
#define FT_WinFNT_ID_CP949   129
#define FT_WinFNT_ID_CP1361  130
#define FT_WinFNT_ID_CP936   134
#define FT_WinFNT_ID_CP950   136
#define FT_WinFNT_ID_CP1253  161
#define FT_WinFNT_ID_CP1254  162
#define FT_WinFNT_ID_CP1258  163
#define FT_WinFNT_ID_CP1255  177
#define FT_WinFNT_ID_CP1256  178
#define FT_WinFNT_ID_CP1257  186
#define FT_WinFNT_ID_CP1251  204
#define FT_WinFNT_ID_CP874   222
#define FT_WinFNT_ID_CP1250  238
#define FT_WinFNT_ID_OEM     255

/**************************************************************************
   *
   * @struct:
   *   FT_WinFNT_HeaderRec
   *
   * @description:
   *   Windows FNT Header info.
   */
  typedef struct  FT_WinFNT_HeaderRec_
  {
    FT_UShort  version;
    FT_ULong   file_size;
    FT_Byte    copyright[60];
    FT_UShort  file_type;
    FT_UShort  nominal_point_size;
    FT_UShort  vertical_resolution;
    FT_UShort  horizontal_resolution;
    FT_UShort  ascent;
    FT_UShort  internal_leading;
    FT_UShort  external_leading;
    FT_Byte    italic;
    FT_Byte    underline;
    FT_Byte    strike_out;
    FT_UShort  weight;
    FT_Byte    charset;
    FT_UShort  pixel_width;
    FT_UShort  pixel_height;
    FT_Byte    pitch_and_family;
    FT_UShort  avg_width;
    FT_UShort  max_width;
    FT_Byte    first_char;
    FT_Byte    last_char;
    FT_Byte    default_char;
    FT_Byte    break_char;
    FT_UShort  bytes_per_row;
    FT_ULong   device_offset;
    FT_ULong   face_name_offset;
    FT_ULong   bits_pointer;
    FT_ULong   bits_offset;
    FT_Byte    reserved;
    FT_ULong   flags;
    FT_UShort  A_space;
    FT_UShort  B_space;
    FT_UShort  C_space;
    FT_UShort  color_table_offset;
    FT_ULong   reserved1[4];

} FT_WinFNT_HeaderRec;

/**************************************************************************
   *
   * @struct:
   *   FT_WinFNT_Header
   *
   * @description:
   *   A handle to an @FT_WinFNT_HeaderRec structure.
   */
  typedef struct FT_WinFNT_HeaderRec_*  FT_WinFNT_Header;

/**************************************************************************
   *
   * @function:
   *    FT_Get_WinFNT_Header
   *
   * @description:
   *    Retrieve a Windows FNT font info header.
   *
   * @input:
   *    face ::
   *      A handle to the input face.
   *
   * @output:
   *    aheader ::
   *      The WinFNT header.
   *
   * @return:
   *   FreeType error code.  0~means success.
   *
   * @note:
   *   This function only works with Windows FNT faces, returning an error
   *   otherwise.
   */
  FT_EXPORT( FT_Error )
  FT_Get_WinFNT_Header( FT_Face               face,
                        FT_WinFNT_HeaderRec  *aheader );

/* */

FT_END_HEADER

#endif /* FTWINFNT_H_ */

/* END */

/* Local Variables: */
/* coding: utf-8    */
/* End:             */