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MF(1)											    MF(1)

NAME
       mf, mf-nowin, inimf, virmf - Metafont, a language for font and logo design

SYNOPSIS
       mf [options] [commands]

DESCRIPTION
       Metafont  reads the program in the specified files and outputs font rasters (in gf format)
       and font metrics (in tfm format).  The Metafont language is described in The Metafontbook.

       Like TeX, Metafont is normally used with a large body of precompiled macros, and font gen-
       eration	in particular requires the support of several macro files.  This version of Meta-
       font looks at its command line to see what name it was called under.  Both inimf and virmf
       are  symlinks  to  the  mf  executable.	 When called as inimf (or when the -ini option is
       given) it can be used to precompile macros into a .base file.  When  called  as	virmf  it
       will use the plain base.  When called under any other name, Metafont will use that name as
       the name of the base to use.   For example, when called as mf the mf base is  used,  which
       is identical to the plain base.	Other bases than plain are rarely used.

       The  commands  given  on  the command line to the Metafont program are passed to it as the
       first input line.  (But it is often easier to type extended arguments as the  first  input
       line,  since  UNIX  shells  tend to gobble up or misinterpret Metafont's favorite symbols,
       like semicolons, unless you quote them.)  As described in  The  Metafontbook,  that  first
       line should begin with a filename, a \controlsequence, or a &basename.

       The normal usage is to say

	      mf  '\mode=<printengine>; [mag=magstep(n);]' input  font

       to start processing font.mf.  The single quotes are the best way of keeping the Unix shell
       from misinterpreting the semicolons and from removing the \  character,	which  is  needed
       here  to keep Metafont from thinking that you want to produce a font called mode.  (Or you
       can just say mf and give the other stuff on the next line, without quotes.) Other  control
       sequences,  such  as batchmode (for silent operation) can also appear.  The name font will
       be the ``jobname'', and is used in forming output file names.  If Metafont doesn't  get	a
       file  name  in  the  first line, the jobname is mfput.  The default extension, .mf, can be
       overridden by specifying an extension explicitly.

       A log of error messages goes into the file jobname.log.	The output files are  jobname.tfm
       and  jobname.<number>gf, where <number> depends on the resolution and magnification of the
       font.  The mode in this example is shown generically as <printengine>, a symbolic term for
       which  the name of an actual device or, most commonly, the name localfont (see below) must
       be substituted. If the mode is not specified or is not valid for your site, Metafont  will
       default	to  proof  mode  which produces large character images for use in font design and
       refinement.  Proof mode can be recognized by the suffix .2602gf after the jobname.   Exam-
       ples of proof mode output can be found in Computer Modern Typefaces (Volume E of Computers
       and Typesetting).  The system of magsteps is identical to the system  used  by  TeX,  with
       values  generally  in  the range 0.5, 1.0, 2.0, 3.0, 4.0 and 5.0.  A listing of gf numbers
       for 118-dpi, 240-dpi and 300-dpi fonts is shown below.

	   MAGSTEP	  118 dpi   240 dpi   300 dpi
       mag=magstep(0)	  118	    240       300
       mag=magstep(0.5)   129	    263       329
       mag=magstep(1)	  142	    288       360
       mag=magstep(2)	  170	    346       432
       mag=magstep(3)	  204	    415       518
       mag=magstep(4)	  245	    498       622
       mag=magstep(5)	  294	    597       746

       Magnification can also be specified not as a magstep but as an arbitrary  value,  such  as
       1.315, to create special character sizes.

       Before  font  production  can begin, it is necessary to set up the appropriate base files.
       The minimum set of components for font production for a given print-engine is the plain.mf
       macro  file  and the local mode_def file.  The macros in plain.mf can be studied in an ap-
       pendix to the Metafontbook; they were developed by Donald E. Knuth, and this  file  should
       never be altered except when it is officially upgraded.	Each mode_def specification helps
       adapt fonts to a particular print-engine.  There is a regular discussion of  mode_defs  in
       TUGboat,  the  journal  of  the	TeX  Users Group.  The local ones in use on this computer
       should be in modes.mf.

       The e response to Metafont's error-recovery mode invokes the system default editor at  the
       erroneous  line	of the source file.  There is an environment variable, MFEDIT, that over-
       rides the default editor.  It should contain a string with "%s" indicating where the file-
       name goes and "%d" indicating where the decimal linenumber (if any) goes.  For example, an
       MFEDIT string for the vi editor can be set with the csh command
	      setenv MFEDIT "vi +%d %s"

       A convenient file in the library is null.mf, containing nothing.  When mf can't	find  the
       file  it  thinks  you want to input, it keeps asking you for another file name; responding
       `null' gets you out of the loop if you don't want to input anything.

ONLINE GRAPHICS OUTPUT
       Metafont can use most modern displays, so you can see its output without printing.   Chap-
       ter  23	of  The  Metafontbook describes what you can do.  This implementation of Metafont
       uses environment variables to determine which display device you want to  use.	First  it
       looks  for  a  variable	MFTERM,  and  then for TERM.  If it can't find either, you get no
       online output.  Otherwise, the value of the variable determines the device to use: hp2627,
       sun (for old SunView), tek, uniterm (for an Atari ST Tek 4014 emulator), xterm (for either
       X10 or X11).  Some of these devices may not be supported in all Metafont executables;  the
       choice is made at compilation time.

       On  some  systems, there are two Metafont binaries, mf and mf-nowin.  On those systems the
       mf binary supports graphics, while the mf-nowin binary does not.  The mf-nowin  binary  is
       used  by  scripts  like mktexpk where graphics support is a nuisance rather than something
       helpful.

OPTIONS
       This version of Metafont understands the following command line options.

       -base base
	      Use base as the name of the base to be used, instead of the name by which  Metafont
	      was called or a %& line.

       -file-line-error
	      Print  error  messages in the form file:line:error which is similar to the way many
	      compilers format them.

       -no-file-line-error
	      Disable printing error messages in the file:line:error style.

       -file-line-error-style
	      This is the old name of the -file-line-error option.

       -halt-on-error
	      Exit with an error code when an error is encountered during processing.

       -help  Print help message and exit.

       -ini   Be inimf, for dumping bases; this is implicitly true if the program  is  called  as
	      inimf.

       -interaction mode
	      Sets  the  interaction  mode.   The  mode  can  be  one  of batchmode, nonstopmode,
	      scrollmode, and errorstopmode.  The meaning of these modes is the same as  that  of
	      the corresponding commands.

       -jobname name
	      Use name for the job name, instead of deriving it from the name of the input file.

       -kpathsea-debug bitmask
	      Sets  path  searching  debugging	flags according to the bitmask.  See the Kpathsea
	      manual for details.

       -maketex fmt
	      Enable mktexfmt, where fmt must be mf.

       -no-maketex fmt
	      Disable mktexfmt, where fmt must be mf.

       -output-directory directory
	      Write output files in directory instead of the current directory.   Look	up  input
	      files in directory first, the along the normal search path.

       -parse-first-line
	      If the first line of the main input file begins with %& parse it to look for a dump
	      name or a -translate-file option.

       -no-parse-first-line
	      Disable parsing of the first line of the main input file.

       -progname name
	      Pretend to be program name.  This affects both  the  format  used  and  the  search
	      paths.

       -recorder
	      Enable  the  filename  recorder.	This leaves a trace of the files opened for input
	      and output in a file with extension .fls.

       -translate-file tcxname
	      Use the tcxname translation table.

       -version
	      Print version information and exit.

ENVIRONMENT
       See the Kpathsearch library documentation (the `Path specifications' node) for the details
       of  how	the  environment  variables are use when searching.  The kpsewhich utility can be
       used to query the values of the variables.

       If the environment variable TEXMFOUTPUT is set, Metafont attempts to put its output  files
       in it, if they cannot be put in the current directory.  Again, see tex(1).

       MFINPUTS
	      Search path for input and openin files.

       MFEDIT Command template for switching to editor.

       MFTERM Determines  the  online graphics display. If MFTERM is not set, and DISPLAY is set,
	      the Metafont window support for X is used.  (DISPLAY must  be  set  to  a  valid	X
	      server  specification,  as  usual.)   If neither MFTERM nor DISPLAY is set, TERM is
	      used to guess the window support to use.

FONT UTILITIES
       A number of utility programs are available.  The following is a partial list of	available
       utilities and their purpose.  Consult your local Metafont guru for details.

       gftopk	Takes a gf file and produces a more tightly packed pk font file.

       gftodvi	Produces proof sheets for fonts.

       gftype	Displays the contents of a gf file in mnemonics and/or images.

       pktype	Mnemonically displays the contents of a pk file.

       mft	Formats a source file as shown in Computer Modern Typefaces.

FILES
       mf.pool
	      Encoded text of Metafont's messages.

       *.base Predigested Metafont base files.

       $TEXMFMAIN/metafont/base/plain.mf
	      The standard base.

       $TEXMFMAIN/metafont/misc/modes.mf
	      The file of mode_defs for your site's various printers

NOTES
       This  manual page is not meant to be exhaustive.  The complete documentation for this ver-
       sion of Metafont can be found in the info manual Web2C: A TeX implementation.

BUGS
       On January 4, 1986 the ``final'' bug in Metafont was discovered and removed. If	an  error
       still  lurks  in  the  code,  Donald E. Knuth promises to pay a finder's fee which doubles
       every year to the first person who finds it.  Happy hunting.

SUGGESTED READING
       Donald E. Knuth, The Metafontbook (Volume C of Computers and Typesetting), Addison-Wesley,
       1986, ISBN 0-201-13445-4.
       Donald  E.  Knuth, Metafont: The Program (Volume D of Computers and Typesetting), Addison-
       Wesley, 1986, ISBN 0-201-13438-1.
       Donald E. Knuth, Computer Modern Typefaces (Volume E of Computers and Typesetting),  Addi-
       son-Wesley, 1986, ISBN 0-201-13446-2.
       TUGboat (the journal of the TeX Users Group).

COMMENTS
       Warning: ``Type design can be hazardous to your other interests.  Once you get hooked, you
       will develop intense feelings about letterforms; the medium will intrude on  the  messages
       that you read.  And you will perpetually be thinking of improvements to the fonts that you
       see everywhere, especially those of your own design.''

SEE ALSO
       gftopk(1), gftodvi(1), gftype(1), mft(1), pltotf(1), tftopl(1).

AUTHORS
       Metafont was designed by Donald E. Knuth, who implemented it using his Web system for Pas-
       cal  programs.	It  was  originally  ported to Unix by Paul Richards at the University of
       Illinois at Urbana-Champaign.  This page was mostly written by Pierre MacKay.

Web2C 2012				   1 March 2011 				    MF(1)
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