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GROHTML(1)							    GROHTML(1)

NAME
       grohtml - html driver for groff

SYNOPSIS
       grohtml [ -bhlnprv ] [ -aaa-text-bits ] [ -Ddir ] [ -Fdir ]
	       [ -gaa-graphic-bits ] [ -iresolution ] [ -Iimage-stem ]
	       [ -jfilename ] [ -oimage-vertical-offset ] [ -ssize ]
	       [ -Slevel ] [ -xhtml-dialect ] [ files... ]

DESCRIPTION
       The grohtml front end (which consists of a  preprocessor,  pre-grohtml,
       and  a  device driver, post-grohtml) translates the output of GNU troff
       to html.	 Users should always invoke grohtml via the groff command with
       a -Thtml option.	 If no files are given, grohtml will read the standard
       input.  A filename of - will also cause grohtml to  read	 the  standard
       input.  Html output is written to the standard output.  When grohtml is
       run by groff options can be passed to grohtml using groff's -P option.

       grohtml invokes groff twice.  In the first pass,	 pictures,  equations,
       and  tables  are	 rendered  using the ps device, and in the second pass
       HTML output is generated by the html device.

       grohtml always writes output in UTF-8 encoding and has  built-in	 enti‐
       ties for all non-composite unicode characters.  In spite of this, groff
       may issue warnings about unknown special characters if  they  can't  be
       found  during  the  first  pass.	  Such	warnings can be safely ignored
       unless the special characters appear inside a table or equation.

OPTIONS
       -aaa-text-bits
	      Number of bits of antialiasing information to be	used  by  text
	      when  generating	png images.  The default is 4 but valid values
	      are 0, 1, 2, and 4.  Note your version of gs  needs  to  support
	      the  -dTextAlphaBits  and -dGraphicAlphaBits options in order to
	      exploit antialiasing.  A value of 0 stops grohtml	 from  issuing
	      antialiasing commands to gs.

       -b     Initialize the background color to white.

       -Ddir  Inform grohtml to place all image files into directory dir.

       -e     This  option should not be directly invoked by the user as it is
	      an internal option utilized by groff when -Thtml or  -Txhtml  is
	      specified.   It is used by the grohtml preprocessor to determine
	      whether eqn should attempt to  produce  MathML  (if  -Txhtml  is
	      specified).

       -Fdir  Prepend  directory  dir/devname  to the search path for font and
	      device description files; name is the name of the	 device,  usu‐
	      ally html.

       -gaa-graphic-bits
	      Number  of bits of antialiasing information to be used by graph‐
	      ics when generating png images.  The default is 4 but valid val‐
	      ues  are	0, 1, 2, and 4.	 Note your version of gs needs to sup‐
	      port the -dTextAlphaBits and -dGraphicAlphaBits options in order
	      to  exploit antialiasing.	 A value of 0 stops grohtml from issu‐
	      ing antialiasing commands to gs.

       -h     Generate section and number headings  by	using  <B>...</B>  and
	      increasing  the  font  size,  rather than using the <Hn>...</Hn>
	      tags.

       -iresolution
	      Select the resolution for all images.  By default	 this  is  100
	      pixels per inch.	Example: -i200 indicates 200 pixels per inch.

       -Istem Determine	  the  image  stem  name.   If	omitted	 grohtml  uses
	      grohtml-XXX (XXX is the process ID).

       -jfilename
	      Inform grohtml to split the html	output	into  multiple	files.
	      The filename is the stem and specified section headings (default
	      is level one) start a new file, named filename-n.html.

       -l     Turn off the production of automatic section links at the top of
	      the document.

       -n     Generate	simple heading anchors whenever a section/number head‐
	      ing is found.  Without the option the anchor value is  the  tex‐
	      tual heading.  This can cause problems when a heading contains a
	      `?' on older versions of some browsers (Netscape).  This flag is
	      automatically turned on if a heading contains an image.

       -overtical-offset
	      Specify the vertical offset of images in points.

       -p     Display  page  rendering	progress to stderr.  grohtml only dis‐
	      plays a page number when an image is required.

       -r     Turn off the automatic header and footer line (html rule).

       -s size
	      Set the base point size of the  source  file.   Thereafter  when
	      this  point size is used in the source it will correspond to the
	      html base size.  Every increase of two points in the source will
	      yield  a <big> tag, and conversely when a decrease of two points
	      is seen a <small> tag is emitted.

       -Slevel
	      When splitting html output,  split  at  the  heading  level  (or
	      higher) defined by level.

       -v     Print the version number.

       -V     Create  an  XHTML or HTML validator button at the bottom of each
	      page of the document.

       -xdialect
	      Select HTML dialect.  Currently, dialect should  be  either  the
	      digit  4	or the letter x which indicates whether grohtml should
	      generate HTML 4 or XHTML, respectively.  This option should  not
	      be directly invoked by the user as it is an internal option uti‐
	      lized by groff when -Thtml or -Txhtml is specified.

       -y     Produce a right-justified groff signature at the end of the doc‐
	      ument.  This is only generated if the -V flag is also specified.

USAGE
       There  are  styles  called  R, I, B, and BI mounted at font positions 1
       to 4.

DEPENDENCIES
       grohtml is dependent upon the png utilities (pnmcut, pnmcrop, pnmtopng)
       and  GhostScript (gs).  pnmtopng (version 2.37.6 or greater) and pnmcut
       from the netpbm package (version 9.16 or greater) will work  also.   It
       is  also	 dependent upon psselect from the PSUtils package.  Images are
       generated whenever a table, picture, equation or line is encountered.

FILES
       grohtml uses temporary files.  See the groff(1) man  page  for  details
       where such files are created.

ENVIRONMENT
       GROFF_FONT_PATH
	      A	 list of directories in which to search for the devname direc‐
	      tory  in	addition  to  the  default  ones.   See	 troff(1)  and
	      groff_font(5) for more details.

BUGS
       Grohtml has been completely redesigned and rewritten.  It is still beta
       code.

SEE ALSO
       afmtodit(1), groff(1), troff(1), psbb(1), groff_out(5),	groff_font(5),
       groff_char(7)

Groff Version 1.22.2		7 February 2013			    GROHTML(1)
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