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//////////////////////////////////////////////////////////////////////////
// This file is part of dvisvgm -- the DVI to SVG converter             //
// Copyright (C) 2005-2010 Martin Gieseking <martin.gieseking@uos.de>   //
//                                                                      //
// This program is free software; you can redistribute it and/or        //
// modify it under the terms of the GNU General Public License as       //
// published by the Free Software Foundation; either version 3 of       //
// the License, or (at your option) any later version.                  //
//                                                                      //
// This program is distributed in the hope that it will be useful, but  //
// WITHOUT ANY WARRANTY; without even the implied warranty of           //
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the         //
// GNU General Public License for more details.                         //
//                                                                      //
// You should have received a copy of the GNU General Public License    //
// along with this program; if not, see <http://www.gnu.org/licenses/>. //
//////////////////////////////////////////////////////////////////////////

dvisvgm(1)
==========
Martin Gieseking <@PACKAGE_BUGREPORT@>
:man source: dvisvgm
:man version: @VERSION@
:man manual: dvisvgm Manual

NAME
----
dvisvgm - converts DVI files to the XML-based SVG format


SYNOPSIS
--------
*dvisvgm* [ 'options' ] 'file' [.dvi]


DESCRIPTION
-----------
The command-line utility *dvisvgm* converts DVI files, as generated by TeX/LaTeX, to the
XML-based scalable vector graphics format SVG. Since the current SVG standard 1.1 doesn't
specify multi-page graphics, *dvisvgm* creates separate SVG files for each DVI page. 
Because of compatibility reasons, only the first page is converted by default. In order 
to select a different page or arbitrary page sequences, use option *-p* which is described below. 

*dvisvgm* should properly convert all pages that are made up of fonts and rules only. 
However, the utility also supports a couple of DVI extensions defined in terms of 'DVI specials'.
For a more detailed overview, see section *support of specials* below.

As SVG is a vector based graphics format, *dvisvgm* tries to convert the glyph 
outlines of all used fonts into scalable path descriptions. The fastest way to do that 
is to extract the path information from PFB (PostScript Type 1) files. So, if *dvisvgm* is able 
to find a PFB file for a required font, it will read the necessary information from it.

TeX's main source for font descriptions is Metafont though, which produces bitmap output. That's why 
not all obtainable TeX fonts are available in PFB format. In these cases *dvisvgm* tries 
to vectorize Metafont's output (GF fonts) by tracing the glyph bitmaps. The results are not 
as perfect as most (manually optimized) PFB outlines but are nonetheless really nice in most cases.


OPTIONS
-------
*-a, --trace-all*=['retrace']::
This option forces dvisvgm to trace not just the actually needed glyphs but all 
glyphs of all bitmap fonts used in the DVI file. Since the tracing results are stored in 
the font cache, all following DVI conversions (without option *--trace-all*) where these 
fonts are involved will be much faster. By default, dvisvgm traces only the actually 
needed glyphs and adds them to the cache. 
The boolean option 'retrace' determines how to handle glyphs that are already stored in the cache.
By default, these glyphs are skipped. Setting argument 'retrace' to 'yes' or
'true' forces dvisvgm to trace the corresponding bitmaps again.
+
[NOTE]
This option only takes affect if font caching is active. Thus, *--trace-all* cannot be 
combined with option *--cache=none*.
+


*-b, --bbox*='fmt'::
Sets the bounding box of the generated graphic to the specified format. The parameter 'fmt'
takes either one of the format specifiers listed below or a sequence of four comma- or
whitespace-separated length values 'x1', 'y1', 'x2' and 'y2'. The latter define two diagonal
corners of the bounding box. Each length value consists of a floating point number and an optional
length unit (pt, bp, cm, mm, in, or pc). If the unit is omitted, TeX points (pt) are assumed.
+
It's also possible to give only one length value 'l'. In this case the minimal bounding box
is computed and enlarged by adding (-'l',-'l') to the upper left and ('l','l') to the lower
right corner.
+
Alternatively, the following format specifiers are supported:
 
 *International DIN/ISO paper sizes*;;
 A__n__, B__n__, C__n__, D__n__, where 'n' is a non-negative integer, e.g. A4 or a4 for DIN/ISO A4 
 format (210mm &#215; 297mm).
 
 *North American paper sizes*;;
   invoice, executive, legal, letter, ledger
 
 *Special bounding box sizes*;;
[horizontal]
   *dvi*::: the page size stored in the DVI file will be used 
   *min*::: the minimal bounding box will be computed and assigned 
   *none*::: no bounding box will be assigned 

//
 *Page orientation*;;
   The default page orientation for DIN/ISO and American paper sizes is 'portrait',
   i.e. 'width' < 'height'. Appending *-landscape* or simply *-l* to the format
   string switches to 'landscape' mode ('width' > 'height'). For symmetry reasons you can 
   also explicitly add *-portrait* or *-p* to indicate the default portrait format.
   Note that these suffixes are part of the size string and not separate options. Thus 
   they must directly follow the above mentioned size specifiers without additional blanks.
   Furthermore, the orientation suffixes can't be used with *dvi*, *min* and *none*.
+
[NOTE]
Option *-b, --bbox* only affects the bounding box and does not transform the page content. Hence if 
you choose a landscape format the page won't be rotated.
+
//

//
*-c, --scale*='sx'[,'sy']::
Scales page content horizontally by 'sx' and vertically by 'sy'. This option is equivalent 
to *-TS*'sx','sy'.


*-C, --cache*[='dir']::
To speed up the conversion process of bitmap fonts, *dvisvgm* saves intermediate conversion
information in cache files. By default, these files are stored in $HOME/.dvisvgm. If you prefer 
a different location use option *--cache* to overwrite the default. Furthermore, it is also possible 
to disable the font caching mechanism completely with option *--cache=none*. If argument 'dir' is omitted,
dvisvgm prints the path of the default cache directory and some information about the stored fonts.


*--color*::
Enables colorization of messages printed during the conversion process.


*-e, --exact*::
If this option is given, dvisvgm computes the precise bounding box of each character. By default,
the values stored in the font's TFM file are used to determine a glyph's extent. As these values are
intended to realize optimal character placements and are not designed to represent the exact dimensions, 
they don't necessarily correspond with the bounds of the visual glyphs. Thus, the width and/or height 
of some glyphs may be larger than the respective TFM values. As a result, this can lead to clipped 
characters at the bounds of the SVG graphic. With option *--exact*, dvisvgm analyzes the actual shape 
of each character and derives a usually tight bounding box.


*-h, --help*::
Prints a short summary of all available command-line options.


*--libgs=filename*::
This option is only available if the Ghostscript library is not directly linked to dvisvgm and
PostScript support was not completely disabled. In this case, dvisvgm tries to load the shared 
GS library dynamically during runtime. By default, it expects the library's name to be libgs.so 
(on Unix-like systems) or gsdll32.dll (Windows). Option *--libgs* can be used to give a different 
name. Alternatively, the GS library name can also be set by the environment variable *LIBGS*. 
The latter has a less precedence than the command-line option.


*-l, --list-specials*::
Prints a list of registered special handlers and exits. Each handler processes a set of special
statements belonging to the same category. The categories are identified by the
prefix of the special statements. It's usually a leading word
separated from the rest of the statement by a colon or a blank, e.g. 'color' or 'ps'.


*--keep*::
Disables the removal of temporary files as created by Metafont (usually .gf, .tfm, and .log files).


*-m, --map-file*='file'::
Sets the map file that is used to look up font names and encodings. *dvisvgm* does not provide
its own map file but tries to use available ones coming with *dvips* or *dvipdfm*. If 
option *-m* is not given *dvisvgm* looks for +ps2pk.map+, +dvipdfm.map+, and +psfonts.map+ (in this order).
Without further options, the file specified by option *-m* will be used instead of the 
default maps. If you want *dvisgvm* to load the given file additionally to the default maps, add a 
leading '+' to the file/path, e.g. `--map-file=+myfonts.map`.
For further information about the file format see the manuals of *dvips* and *dvipdfm*. 


*-M, --mag*='factor'::
Sets the maginfication factor used for Metafont calls prior tracing the glyphs.
The larger this value the better the tracing results. Nevertheless 
large magnification values can cause Metafont arithmetic errors due to number 
overflows. So use this option with care. The default setting usually produces 
nice results.


*-n, --no-fonts*::
If this option is given, *dvisvgm* doesn't create font elements but uses paths instead. The
resulting SVG file is usually bigger but concurrently more compatible with most applications that
don't support SVG fonts yet. This option implies *--no-styles*.


*-S, --no-specials*[='names']::
Disable processing of special commands that are embedded in the DVI file. If no further
parameter is given, all specials are ignored. To selectively disable sets of specials,
an optional comma-separated list of names can be appended to this option. A 'name' is a unique 
identifier referencing a special handler. Option *--list-specials* lists all currently available 
handlers and their names. 
All unsupported special statements are silently ignored.


*--no-styles*::
By default, *dvisvgm* uses CSS styles and class attributes to reference fonts because it's more
compact than repeatedly set the complete font information in each text element. However, if you 
prefer direct font references, the default behavior can be disabled with option *--no-styles*.


*--no-mktexmf*::
Suppresses the generation of missing font files. If *dvisvgm* can't find a font file
through the kpathsea lookup mechanism, it calls the external tools mktextfm or mktexmf by 
default. This option disables these calls.


*-o, --output*='pattern'::
Sets the name pattern of the output file. The parameter 'pattern' is a string that may
contain the variables *%f* and *%p*. *%f* stands for the base name of the DVI file, i.e. 
the DVI filename without suffix, and *%p* is the current page number.
By default, the pattern is *%f-%p.svg* if the DVI file consists of more than one page, and 
*%f.svg* otherwise. That means, a DVI file 'foo.dvi' is converted to 'foo.svg' if 'foo.dvi'
is a single-page document. Otherwise, multiple SVG files 'foo-01.svg', 'foo-02.svg', etc. are
produced. In Windows environments, the percent sign is used to get the value of environment 
variables, and must therefore be protected by a second percent sign, e.g. *--output=%%f-%%p*.


*-p, --page*='ranges'::
This option sets the pages to be processed. Parameter 'ranges' consists of a comma-separated list 
of single page numbers and/or page ranges. A page range is a pair of numbers separated by a hyphen, 
e.g. 5-12. Thus, a page sequence might look like this: 2-4,6,9-12,15. It doesn't matter if a page
is given more than once or if page ranges overlap. *dvisvgm* always extracts the page numbers in 
ascending order and converts them only once.
In order to stay compatible with previous versions, the default page sequence is 1. dvisvgm 
therefore converts only the first page and not the whole document in case option *--page* is not given.
Usually, page ranges consist of two numbers denoting the first and last page to be converted. 
If the conversion is to be started at page 1, or if it should continue up to the last DVI page, the 
first or second range number can be omitted, respectively. Example: *--page=-10* converts all 
pages up to page 10, *--page=10-* converts all pages starting with page 10.
Please consider that the page values don't refer to the page numbers printed on the page. 
Instead, the physical page count is expected, where the first page always gets number 1.


*-P, --progress*[='delay']::
Enables a simple progress indicator shown when time-consuming operations like
PostScript specials are processed. The indicator doesn't appear before the given
delay (in seconds). The default delay value is 0.5 seconds.


*-r, --rotate*='angle'::
Rotates page content clockwise by 'angle' degrees around the page center.
This option is equivalent to *-TR*'angle'.


*-s, --stdout*::
Don't write output to a file but redirect it to *stdout*.


*-t, --translate*='tx'[,'ty']::
Translates (moves) page content in direction of vector ('tx','ty'). This option is 
equivalent to *-TT*'tx','ty'.


*-T, --transform*='commands'::
Applies a sequence of transformations to the SVG content. Each transformation is described
by a 'command' that begins with a capital letter followed by a list of comma-separated 
parameters. Following transformation commands are supported:
 
  *T* 'tx'[,'ty'];;
    Translates (moves) page in direction of vector ('tx','ty'). If 'ty' is omitted,
    'ty'=0 is assumed.
    The expected unit length of 'tx' and 'ty' are TeX points (1pt = 1/72.27in). However, there 
    are several constants defined to simplify the unit conversion (see below).
  
  *S* 'sx'[,'sy'];;
    Scales page horizontally by 'sx' and vertically by 'sy'. If 'sy' is omitted
    'sy'='sx' is assumed.
  
  *R* 'angle'[,'x','y'];;
    Rotates page clockwise by 'angle' degrees around point ('x','y'). If the optional
    arguments 'x' and 'y' are omitted the page will be rotated around its center depending on
    the chosen page format. When option *-bnone* is given, the rotation center is origin (0,0).
  
  *KX* 'angle';;
    Skews page along the 'x'-axis by 'angle' degrees. Argument 'angle' can take any value
    except 90+180__k__, where 'k' is an integer.
  
  *KY* 'angle';;
    Skews page along the 'y'-axis by 'angle' degrees. Argument 'angle' can take any value
    except 90+180__k__, where 'k' is an integer.
  
  *FH* ['y'];;
  Mirrors (flips) page at the horizontal line through point (0,'y'). Omitting the optional argument
  leads to 'y'='h'/2, where 'h' denotes the page height (see 'pre-defined constants' below).
  
  *FV* ['x'];;
  Mirrors (flips) page at the vertical line through point ('x',0). Omitting the optional argument
  leads to 'x'='w'/2, where 'w' denotes the page width (see 'pre-defined constants' below).
  
  *M* 'm1',...,'m6';;
  Applies a transformation described by the 3&#215;3 matrix 
  \(('m1','m2','m3'),('m4','m5','m6'),(0,0,1)), where the inner triples denote
  the rows.

+
[NOTE]
=================================================================================================
All transformation commands of option *-T, --transform* are applied in the order of their appearance. Multiple commands can 
optionally be separated by spaces. In this case the whole transformation string has to be enclosed in double 
quotes. All parameters are expressions of floating point type. You can either give plain numbers 
or arithmetic terms combined by the operators *+* (addition), *-* (substraction), 
*** (multiplication), */* (division) or *%* (modulo) with common associativity and 
precedence rules. Parentheses may be used as well.

Additionally, some pre-defined constants are provided:

[horizontal]
*ux*:: horizontal position of upper left page corner in TeX point units
*uy*:: vertical position of upper left page corner in TeX point units
*h*:: page height in TeX point units (0 in case of *-bnone*)
*w*:: page width in TeX point units (0 in case of *-bnone*)

Furthermore, you can use the length constants *pt*, *mm*, *cm* and *in*, e.g.
+2cm+ or +1.6in+. Thus, option +-TT1in,0R45+ moves the page content 1 inch to the right and rotates it
by 45 degrees around the page center afterwards.

For single transformations you can also use options *-c*, *-t* and *-r*. Note that 
the order in which these options are given is not significant, i.e. you can't use them to describe
transformation sequences. They are simply independent shorthand options for common transformations. 

=================================================================================================
+

*-v, --verbosity*='level'::
Controls the type of messages printed during a *dvisvgm* run:
[horizontal]
  *0*;; no message output
  *1*;; error messages only
  *2*;; warning messages only
  *4*;; informational messages only

+
[NOTE]
By adding these values you can combine the categories. The default level is 7, i.e. all 
messages are printed.
+


*-V, --version*::
Prints the version number and exits.


*-z, --zip*[='level']::
Creates a compressed SVG file with suffix .svgz. The optional argument specifies the compression 
level. Valid values are in the range of 1 to 9 (default is 9). Larger values cause better compression 
results but take more computation time. 
+
CAUTION: This option cannot be combined with *-s, --stdout*.


SUPPORT OF SPECIALS
-------------------
*dvisvgm* supports several sets of special commands that can be used to enrich DVI files with additional 
features, like color, graphics or hyperlinks. The evaluation of special commands is done by various handlers, 
where each handler is responsible for all special statements of the same command set, i.e. commands beginning 
with the same prefix. To get a list of actually provided special handlers, use option *--list-specials* (see above).

*bgcolor*::
Special statement for changing the background/page color. Since SVG 1.1 doesn't support background colors,
*dvisvgm* inserts a rectangle of the chosen color. In the current version, this rectangle always gets the size
of the minimal bounding box. This command is part of the color special set but is handled separately in order
to let the user turn it off. For an overview of the command syntax, see the documentation of *dvips*, for instance.


*color*::
Statements of this command set provide instructions to change the text/paint color. For an overview of the 
exact syntax, see the documentation of *dvips*, for instance.

*dvisvgm*::
*dvisvgm* offers its own small set of specials. The following list gives a brief overview. 
  *dvisvgm:raw* 'text';;
  Adds an arbitrary sequence of characters to the SVG output. *dvisvgm* does not perform any validation here, 
  thus the user of this special has to ensure that the resulting SVG is still valid. The parameter 'text' may
  contain the macros *{?x}*, *{?y}*, and *{?color}* which are expanded to the current 'x' or 'y' coordinate
  and the current color, respectively. Also, the macro *{?nl}* expands to a newline character.
 
  *dvisvgm:img* 'width' 'height' 'file';;
  Creates an image element at the current graphic position referencing the given file. JPEG, PNG, and SVG images
  can be used here. However, *dvisvgm* does not check the file format or the file name suffix. The lengths 'width'
  and 'height' must be given as plain floating point numbers in TeX point units (1in = 72.27pt).
 
  *dvisvgm:bbox* n[ew] 'name';;
  Defines or resets a local bounding box called 'name'. The name may consist of letters and digits. 
  While processing a DVI page, dvisvgm continuously updates the (global) bounding box of the current page in order to
  determine the minimal rectangle containing all visible page components (characters, images, drawing elements etc.).
  Additionally to the global bounding box, the user can request an arbitrary number of named local bounding boxes. 
  Once defined, these boxes are updated together with the global bounding box starting with the first character that 
  follows the definition. Thus, the local boxes can be used to compute the extent of parts of the page. This is useful
  for scenarios where the generated SVG file is post-processed. 
  In conjunction with special dvisvgm:raw, the macro *{?bbox 'name'}* expands to the four values 'x', 'y', 'w', and 'h' 
  (separated by spaces) specifying the coordinates of the upper left corner, width, and height of the local box 'name'. 
  If box 'name' wasn't previously defined, all four values equal zero.
 
  *dvisvgm:bbox* 'width' 'height' ['depth'];;
  Updates the bounding box of the current page by embedding a virtual rectangle ('x', 'y', 'width', 'height')
  where the lower left corner is located at the current DVI drawing position ('x','y'). If the optional parameter 'depth' 
  is specified, dvisvgm embeds a second rectangle ('x', 'y', 'width', -__depth__). The lengths 'width', 'height' and 
  'depth' must be given as plain floating point numbers in TeX point units (1in = 72.27pt). Depending on size and position 
  of the virtual rectangle, this command either enlarges the overall bounding box or leaves it as is. It's not possible 
  to reduce its extent. This special should be used in conjunction with *dvisvgm:raw* in order to properly update the viewport 
  of the page. 
 
  *dvisvgm:bbox* a[bs] 'x1' 'y1' 'x2' 'y2';;
  This variant of the bbox special updates the bounding box by embedding a virtual rectangle ('x1','y1','x2','y2').
  The points ('x1','y1') and ('x2','y2') denote two diagonal corners of the rectangle given in TeX point units.
 
  *dvisvgm:bbox* f[ix] 'x1' 'y1' 'x2' 'y2';;
  This variant of the bbox special assigns an absolute (final) bounding box to the resulting SVG. After executing
  this command, dvisvgm doesn't further alter the bounding box coordinates, except this special is called again later.
  The points ('x1','y1') and ('x2','y2') denote two diagonal corners of the rectangle given in TeX point units.
+
The following TeX snippet adds two raw SVG elements to the output and updates the bounding box accordingly:
+
------------------------------------------------------------------------------------
\special{dvisvgm:raw <circle cx='{?x}' cy='{?y}' r='10' stroke='black' fill='red'/>}
\special{dvisvgm:bbox 20 10 10}

\special{dvisvgm:raw <path d='M50 200 L10 250 H100 Z' stroke='black' fill='blue'/>}
\special{dvisvgm:bbox abs 10 200 100 250}
------------------------------------------------------------------------------------
+

*em*::
These specials were introduced with the emTeX distribution by Eberhard Mattes. They provide line drawing 
statements, instructions for embedding MSP, PCX, and BMP image files, as well as two PCL commands. 
*dvisvgm* supports only the line drawing statements, all other em specials are silently ignored.
A description of the command syntax can be found in the DVI driver documentation coming with emTeX (see CTAN).

// *html*::
// The hyperref package uses a set of HTML anchor tags to indicate hyperlinks in DVI files. 
// *dvisvgm* converts them to corresponding SVG elements.

*ps*::
The famous DVI driver *dvips* introduced its own set of specials in order to embed PostScript code into DVI files,
which greatly improves the capabilities of DVI documents. One aim of *dvisvgm* is to completely evaluate the
PostScript code and to convert a large amount of it to SVG. 
Since PostScript is a rather complex language, *dvisvgm* does not try to implement its own PostScript interpreter but uses
Ghostscript instead. If the Ghostscript library was not linked while building dvisvgm, it is looked up and dynamically loaded
during runtime. In this case, dvisvgm looks for libgs.so on Unix-like systems, and gsdll32.dll on Windows. You can override these
default file names with the environment variable LIBGS.
The library must be installed and reachable through the ld search path (\*nix) or the PATH environment variable (Windows). 
If it cannot be found, the evaluation of PostScript specials is disabled. Use option *--list-specials* to check whether 
PS support is available, i.e. the entry 'ps' is present.

*tpic*::
The TPIC special set defines instructions for drawing simple geometric objects. Some LaTeX packages, like
eepic and tplot, use these specials to describe graphics. 


EXAMPLES
--------
--------------
dvisvgm file
--------------
Converts first page of 'file.dvi' to 'file.svg'.

---------------
dvisvgm -z file
---------------
Converts first page of 'file.dvi' to 'file.svgz' with default compression level 9.

-------------------------------------
dvisvgm -p5 -z3 -ba4-l -onewfile file
-------------------------------------
Converts fifth page of 'file.dvi' to 'newfile.svgz' with compression level 3.
The bounding box is set to DIN/ISO A4 in landscape format.

-----------------------------------------------------
dvisvgm --transform="R20,w/3,2h/5 T1cm,1cm S2,3" file
-----------------------------------------------------
Converts first page of 'file.dvi' to 'file.svg' where three transformations are applied.


ENVIRONMENT
-----------
*dvisvgm* uses the *kpathsea* library for locating the
files that it opens. Hence, the environment variables described in
the library's documentation influence the converter.

If dvisvgm was linked without the Ghostscript library and PostScript support has not been disabled,
the shared Ghostscript library is looked up during runtime. The environment variable LIBGS can be
used to specify the file name of library.

The pre-compiled Windows version of *dvisvgm* requires a working installation of MiKTeX 2.7 or above.
To enable evaluation of PostScript specials, the original Ghostscript DLL must be present. 

FILES
-----
The location of the following files is determined by the kpathsea library.
To check the actual kpathsea configuration you can use the *kpsewhich* utility.

[horizontal]
**.enc*:: Font encoding files
**.fgd*:: Font glyph data files (cache files created by dvisvgm)
**.map*:: Font map files
**.mf*::  Metafont input files
**.pfb*:: PostScript Type 1 font files
**.pro*:: PostScript header/prologue files
**.tfm*:: TeX font metric files
**.ttf*:: TrueType font files
**.vf*::  Virtual font files

SEE ALSO
--------
*tex(1), mf(1), mktexmf(1), grodvi(1), potrace(1)*, and the *kpathsea library* info documentation.


RESOURCES
---------
Project home page::: http://dvisvgm.sourceforge.net
SourceForge project site::: http://sourceforge.net/projects/dvisvgm


AUTHOR
------
Written by {author} <{email}>


COPYING
-------
Copyright (C) 2005-2010 by Martin Gieseking. Free use of this software is
granted under the terms of the GNU General Public License (GPL) version 3 
or, (at your option) any later version.

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