NAME

hbf2gf - convert a CJK bitmap font into subfonts usable by TeX and Omega.

SYNOPSIS

hbf2gf [-q] configuration-file[.cfg]
hbf2gf
[-q] [-p] [-g] [-n] subfont-name x-resolution [y-scale | y-resolution]

hbf2gf -t [-q] subfont-name
hbf2gf --version | --help

DESCRIPTION

CJK bitmap fonts can't be directly used with TeX because the number of characters in such fonts exceeds 256, the limit of a TeX font. Thus it is necessary to split these fonts into subfonts, and this is exactly what hbf2gf does.

As the name says, hbf2gf uses CJK fonts in a certain format which is called Hanzi Bitmap Font (HBF) format. It simply consists of the CJK bitmap file(s) and a text file in a format very similar to the BDF format of the X Window System which describes the bitmap font files: the encoding, the size, etc. The produced GF files can then be converted with gftopk into standard PK files.

hbf2gf can be called in three modes:

hbf2gf [-q] configuration-file[.cfg]

This call normally creates a set of GF files, one PL file, and a batch file which must be executed after hbf2gf has finished. This script will then call gftopk to convert all GF files into PK files, and it will call pltotf to convert the PL file into a TFM file. Finally it will copy the TFM file so that each PK file has its TFM file (which are all identical).

If ofm_file is set to ‘yes’ in the configuration file, OFM and OVF files will be created too.

-q makes hbf2gf quiet.

hbf2gf
[-q] [-p] [-g] [-n] subfont-name x-resolution [y-scale | y-resolution]

This mode is intended for use with mktexpk and its derivates. Only one GF file together with a PL file for the given subfont will be computed, taking the horizontal resolution and a vertical scaling factor (if the value is smaller than 10) resp. the vertical resolution (otherwise) from the command line, ignoring the nmb_fonts parameter of the configuration file. The last two characters (which are interpreted as the subfont number) are stripped to get the name for the configuration file (which must end with ‘.cfg’). No job file will be created. If option -p is set, no PL file is created. If -g is set, no GF file is created. The extension can be controlled with -n; if set, the extension is ‘.gf’, otherwise ‘.<resolution>gf’. -q makes hbf2gf quiet.

hbf2gf
-t [-q] subfont-name

This mode is intended for use with scripts like mktexpk; it tests whether the specified subfont name leads to an hbf2gf configuration file. It returns 0 on success and prints out the name of that configuration file (provided the -q switch isn't set). This test isn't a thorough one; it only removes the last two characters and checks whether a configuration file with that name exists.

See the next section for more details about configuration files.

Specifying the option --version returns the current version of hbf2gf and the used file search library (e.g. kpathsea). Usage information is shown with the --help parameter.

CONFIGURATION FILE

Here a sample configuration file (gsfs14.cfg) for a 56×56 Chinese font in GB encoding; note that all information about the font is in the jfs56.hbf file. See the FILE SEARCHING section how HBF fonts and hbf2gf configuration files are found. See the AVAILABILITY section where to get CJK fonts together with its HBF files:



  hbf_header     jfs56.hbf


  mag_x          1


  threshold      128


  comment        jianti fansongti 56x56 pixel font


  design_size    14.4


  y_offset       -13


  nmb_files      -1


  output_name    gsfs14


  checksum       123456789


  dpi_x          300


  pk_files       no


  tfm_files      yes


  coding         codingscheme GuoBiao encoded TeX text


  pk_directory   $HBF_TARGET/pk/modeless/gb2312/gsfs14/


  tfm_directory  $HBF_TARGET/tfm/gb2312/gsfs14/

A configuration file is a plain text file consisting of keywords and its arguments. A keyword must start a line, otherwise the whole line will be ignored. If the word starting a line is not a keyword, the line will be ignored too. Empty lines will also be skipped. The search for keywords is case insensitive; in contrast, the arguments will be taken exactly as given (except ‘yes’ and ‘no’ which can be written with uppercase or lowercase letters). Each keyword has one argument which must be separated by whitespace (blanks or tabs) from the keyword and must be on the same line. Each line must not be longer than 256 characters.

You can use environment variables in the configuration file. The escape character starting an environment variable in the configuration file is always ‘$’, even for operating systems like DOS which has other conventions. hbf2gf recognizes only environment variable names which start with a letter or an underscore, followed by alphanumeric characters or underscores. You can surround the variable with braces to indicate where the variable name ends, for example ${FOO}. To get a dollar sign you must write ‘$$’. The expansion of environment variables in hbf2gf itself (without the help of either kpathsea, emtexdir, or MiKTeX searching routines) is very limited; this feature has been carried over from previous versions. It can't expand variables set in texmf.cnf; it also can't handle more than one directory as the variable's value. Don't use it except for the ‘pk_directory’ and ‘tfm_directory’ parameters!

This is the list of all necessary keywords:

hbf_header: The HBF header file name of the input font(s). hbf2gf uses the given searching mechanism (kpathsea, emtexdir, or MiKTeX) to locate this file.
output_name: The name stem of the output files. A running two digit decimal number starting with ‘01’ will be appended. For Unicode fonts see the keyword unicode below. This value is in almost all cases identical to the name of the configuration file.

And now all optional keywords:

x_offset: Increases the character width. Will be applied on both sides; default for non-rotated glyphs is the value given in the HBF header (HBF_BITMAP_BOUNDING_BOX) scaled to design_size (in pixels).
y_offset: Shifts all characters up or down; default for non-rotated glyphs is the value given in the HBF header (HBF_BITMAP_BOUNDING_BOX) scaled to design_size (in pixels).
design_size: The design size (in points) of the font. x_offset and y_offset refer to this size. Default is 10.0.
slant: The slant of the font (given as Delta_x / Delta_y). Only values in the range 0 ≤ slant ≤ 1 are allowed. Default is 0.0.
rotation: If set to ‘yes’, all glyphs will be rotated 90 degrees counter-clockwise. The default offsets as given in the HBF header will be ignored (and set to 0). Default is ‘no’.
mag_x
mag_y: Scaling values of the characters to reach design size. If only one magnification is given, x and y values are assumed to be equal. Default is mag_x = mag_y = 1.0.
threshold: A value between 1 and 254 defining a threshold for converting the internal graymap into the output bitmap; lower values cut more pixels. Default value is 128.
comment: A comment describing the font; default is none.
nmb_fonts: The number of subfonts to create. Default value is -1 for creating all fonts.
unicode: If ‘yes’, a two digit hexadecimal number will be used as a running number, starting with the value of the first byte of the first code range. Default is ‘no’.
min_char: The minimum value of the encoding. You should set this value to get correct subfile offsets if it is not identical to the lowest character code in the HBF file.
dpi_x
dpi_y: The horizontal and vertical resolution (in dpi) of the printer. If only one resolution is given, x and y values are assumed to be equal. Default is 300.
checksum: A checksum to identify the GF files with the appropriate TFM files. The default value of this unsigned 32bit integer is 0.
coding: A comment describing the coding scheme; default is none.
pk_directory: The destination directory of the PK files; default: none. Attention! The batch file will not check whether this directory exists.
tfm_directory: The destination directory of the TFM files; default: none. Attention! The batch file will not check whether this directory exists.
pk_files: Whether to create PK files or not; default is ‘yes’.
tfm_files: Whether to create TFM files or not; default is ‘yes’.
ofm_file: Whether to create an OPL file or not; default is ‘no’. The batch file will then use ovp2ovf of the Omega distribution to convert it into an OFM and an OVF file. The OPL file simply maps all subfonts back to a single Omega font.
long_extension: If ‘yes’, PK files will include the resolution in the extension (e.g. gsso1201.300pk). This affects the batch file only (default is ‘yes’).
rm_command: The shell command to remove files; default: ‘rm’.
cp_command: The shell command to copy files; default: ‘cp’.
job_extension: The extension of the batch file which calls gftopk and pltotf to convert the GF and the PL files into PK and TFM files respectively; default is none.

FILE SEARCHING

hbf2gf uses either the kpathsea, emtexdir, or MiKTeX library for searching files (emtexdir will work only on operating systems which have an MS-DOSish background, i.e., MS-DOS, OS/2, Windows; MiKTeX is for Win32 systems).

kpathsea

The actual version of kpathsea is displayed on screen if you call hbf2gf --version.

Here is a table of the file type and the corresponding kpathsea variables.

.hbf MISCFONTS
.cfg HBF2GFINPUTS

Please consult the info files of kpathsea for details on these variables. The decision which naming scheme to use for variables will be done during compilation.

You should set the TEXMFCNF variable to the directory where your texmf.cnf configuration file resides.

Here is the proper command to find out to which value a kpathsea variable is set (we use MISCFONTS as an example). This is especially useful if a variable isn't set in texmf.cnf or in the environment, thus pointing to the default value which is hard-coded into the kpathsea library.

kpsewhich -progname=hbf2gf -expand-var='$MISCFONTS'

We select the program name also since it is possible to specify variables which are searched only for a certain program – in our example it would be MISCFONTS.hbf2gf.

A similar but not identical method is to say

kpsewhich -progname=hbf2gf -show-path='misc fonts'

[A full list of format types can be obtained by saying ‘kpsewhich --help’ on the command line prompt.] This is exactly how hbf2gf searches for files; the disadvantage is that all variables are expanded which can cause very long strings.

emtexdir

Here the list of suffixes and its related environment variables to be set in autoexec.bat (resp. in config.sys for OS/2):

.hbf HBFONTS
.cfg HBFCFG

If one of the variables isn't set, a warning message is emitted. The current directory will always be searched. As usual, one exclamation mark appended to a directory path causes subdirectories one level deep to be searched, two exclamation marks causes all subdirectories to be searched. Example:

HBFONTS=c:\fonts\hbf!!;d:\myfonts\hbf!

Constructions like ‘c:\fonts!!\hbf’ aren't possible.

MikTeX

Please consult the documentation files of MiKTeX for more details.

LIMITATIONS

The x and y output size must not exceed MAX_CHAR_SIZE, which is defined at compile time; its default value is 1023 (pixel).

FILES

*.cfg: The hbf2gf configuration scripts.
*.hbf: HBF header files which describe fixed-width bitmap fonts. Note that the bitmap font name(s) themselves as specified in the header files are irrelevant for hbf2gf.

AVAILABILITY

hbf2gf is part of the CJK macro package for LaTeX 2e available at the CTAN hosts and its mirrors.

CJK fonts together with HBF header files can be found at ftp.ifcss.org and its mirrors.

AUTHORS

Werner Lemberg <wl@gnu.org>
Ross Paterson (the HBF API) <ross@soi.city.ac.uk>