DVISVGM(1)

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 this file.

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 only 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 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
        An, Bn, Cn, Dn, where n is a non-negative integer, e.g. A4 or a4 for DIN/ISO A4 format (210mm × 297mm).

    North American paper sizes
        invoice, executive, legal, letter, ledger

    Special bounding box sizes
        dvi | page size stored in the DVI file
        min | computes the minimal/tightest bounding box
        none | no bounding box is 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 size specifier 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 the page content horizontally by sx and vertically by sy. This option is equivalent to -TSsx,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/cache. 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. Additionally, outdated and corrupted cache files are removed.

--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, 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 during compilation. 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 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 usually 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 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 applied in conjunction with 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[=variant]
    If this option is given, dvisvgm doesn’t create SVG font elements but uses paths instead. The resulting SVG files tends to be larger but concurrently more compatible with most applications that don’t support SVG fonts yet. The optional argument variant selects the method how to substitute fonts by paths. Variant 0 creates path and use elements. Variant 1 creates path elements only. Option --no-fonts implies --no-styles.

-S, --no-specials[=names]
    Disable processing of special commands 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 the unique identifier referencing the intended 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. This option disables these calls.

-o, --output=pattern
    Sets the name pattern of the output file. 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 indicates dereferenced 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) has elapsed. The default delay value is 0.5 seconds.

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

-s, --stdout
    Don’t write the SVG output to a file but redirect it to stdout.

-t, --translate=tx[,ty]
    Translates (moves) the page content in direction of vector (tx,ty). This option is equivalent to -TTtx,ty.

-T, --transform=commands
    Applies a sequence of transformations to the SVG content. Each transformation is described by a command beginning with a capital letter followed by a list of comma-separated parameters. Following transformation commands are supported:

    T tx[,ty]
        Translates (moves) the 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 the page horizontally by sx and vertically by sy. If sy is omitted, sy=sx is assumed.

    R angle[,x,y]
        Rotates the 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 the page along the x-axis by angle degrees. Argument angle can take any value except 90+180k, where k is an integer.

    KY angle
        Skews the page along the y-axis by angle degrees. Argument angle can take any value except 90+180k, where k is an integer.

    FH [y]
        Mirrors (flips) the 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) the 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 3×3 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:
        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.

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 delegated to various handlers. 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 has to ensure that the resulting SVG is still valid. Parameter text may contain the macros {?x}, {?y}, and {?color} that are expanded to the current x or y coordinate and the current color, respectively. Also, 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 update the viewport of the page properly.

    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 and ignores all other em specials silently. A description of the command syntax can be found in the DVI driver documentation coming with emTeX (see CTAN).

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 all PostScript snippets and to convert a large amount of it to SVG. However, in contrast to dvips, dvisvgm uses floating point arithmetics to compute the precise position of each graphic element, i.e. it doesn’t round the corrdinates. Therefore, the relative locations of the graphic elements may slightly differ from those computed by dvips.

    Since PostScript is a rather complex language, dvisvgm does not try to implement its own PostScript interpreter but relies on 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 for gsdll32.dll on Windows. You can override these default file names with the environment variable LIBGS. The library must be installed and must be 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 if PostScript support has not been disabled, the shared Ghostscript library is looked up during runtime. The environment variable LIBGS can be used to specify path and file name of the 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 and reachable through the search path.

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.
*.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 Martin Gieseking <martin.gieseking@uos.de>

COPYING

Copyright © 2005-2011 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.