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NAMEdvipng - A DVI-to-PNG translator
SYNOPSISdvipng [options] filename
dvipng [options] [filename] -
DESCRIPTIONThis program makes
The benefits of dvipng/dvigif include
Speed. It is a very fast bitmap-rendering code for DVIfiles, which makes it suitable for generating large amounts of images on-the-fly, as needed in preview-latex, WeBWorK and others.
It does not read the postamble, so it can be started before TeX
finishes. There is a --follow switch that makes dvipng wait at
end-of-file for further output, unless it finds the POSTmarker that indicates the end of theDVI.
- Interactive query of options. dvipng can read options interactively through stdin, and all options are usable. It is even possible to change the input file through this interface.
Supports PK, VF,PostScript Type1, and TrueType fonts, subfonts (i.e., as used in CJK-LaTeX), color specials, and inclusion of PostScript,PNG, JPEGorGIFimages.
- and more...
OPTIONSMany of the parameterless options listed here can be turned off by suffixing the option with a zero (0); for instance, to turn off page reversal, use -r0. Such options are marked with a trailing *.
- Read additional options from standard input after processing the command line.
- Print a usage message and exit.
- Print the version number and exit.
- -bd num
- -bd color_spec
- -bd 'num color_spec'
- Set the pixel width of the transparent border (default 0). Using this option will make the image edges transparent, but it only affects pixels with the background color. Giving a color_spec will set the fallback color, to be used in viewers that cannot handle transparency (the default is the background color). The color spec should be in TeX color \special syntax, e.g., 'rgb 1.0 0.0 0.0'. Setting the fallback color makes the default border width 1 px.
- --bdpi num
This option only has an effect when using bitmapped (PK) fonts. The option sets the base (Metafont) resolution, both horizontal and vertical, to num dpi (dots per inch). This option is necessary when manually selecting Metafont mode with the --mode option (see below).
- -bg color_spec
Choose background color for the images. This option will be ignored if
there is a background color \special in the DVI.The color spec should be in TeX color \special syntax, e.g., 'rgb 1.0 0.0 0.0'. You can also specify 'Transparent' or 'transparent' which will give you a transparent background with the normal background as a fallback color. A capitalized 'Transparent' will give a full-alpha transparency, while an all-lowercase 'transparent' will give a simple fully transparent background with non-transparent antialiased pixels. The latter would be suitable for viewers who cannot cope with a true alpha channel.GIFimages do not support full alpha transparency, so in case ofGIFoutput, both variants will use the latter behaviour.
- -d num
- Set the debug flags, showing what dvipng (thinks it) is doing. This will work unless dvipng has been compiled without the "DEBUG" option (not recommended). Set the flags as you need them, use -d -1 as the first option for maximum output.
- -D num
Set the output resolution, both horizontal and vertical, to num
dpi (dots per inch).
One may want to adjust this to fit a certain text font size (e.g., on a web page), and for a text font height of font_px pixels (in Mozilla) the correct formula is
<dpi> = <font_px> * 72.27 / 10 [px * TeXpt/in / TeXpt]
The last division by ten is due to the standard font height 10pt in your document, if you use 12pt, divide by 12. Unfortunately, some proprietary browsers have font height in pt (points), not pixels. You have to rescale that to pixels, using the screen resolution (default is usually 96 dpi) which means the formula is
<font_px> = <font_pt> * 96 / 72 [pt * px/in / (pt/in)]
On some high-res screens, the value is instead 120 dpi. Good luck!
Report the depth of the image. This only works reliably when the
LaTeX style preview.sty from preview-latex is used with
the active option. It reports the number of pixels from the
bottom of the image to the baseline of the image. This can be used for
vertical positioning of the image in, e.g., web documents, where one
would use (Cascading StyleSheets 1)
<IMG SRC="<filename.png>" STYLE="vertical-align: -<depth>px">
The depth is a negative offset in this case, so the minus sign is necessary, and the unit is pixels (px).
- Set this option to make the output page number be the TeX page numbers rather than the physical page number. See the -o switch.
- -fg color_spec
Choose foreground color for the images. This option will be ignored if
there is a foreground color \special in the DVI.The color spec should be in TeX color \special syntax, e.g., 'rgb 1.0 0.0 0.0'.
Wait for data at end-of-file. One of the benefits of dvipng is that it
does not read the postamble, so it can be started before TeX
finishes. This switch makes dvipng wait at end-of-file for further
output, unless it finds the POSTmarker that indicates the end of theDVI.This is similar to tail -f but for DVI-to-PNG conversion.
Enable/disable FreeType font rendering (default on). This option is
available if the FreeType2 font library was present at compilation time.
If this is the case, dvipng will have direct support for PostScript
Type1 and TrueType fonts internally, rather than using gsftopk
for rendering the fonts. If you have PostScript versions of Computer
Modern installed, there will be no need to generate bitmapped (PK) variants on disk of these. Then, you can render images at different (and unusual) resolutions without cluttering the disk with lots of bitmapped fonts.
- --gamma num
- Control the interpolation of colors in the greyscale anti-aliasing color palette. Default value is 1.0. For 0 < num < 1, the fonts will be lighter (more like the background), and for num > 1, the fonts will be darker (more like the foreground).
The images are output in the GIFformat, ifGIFsupport is enabled. This is the default for the dvigif binary, which only will be available whenGIFsupport is enabled.GIFimages are palette images (see the --palette option) and does not support true alpha channels (see the --bg option). See also the --png option.
- Report the height of the image. This only works reliably when the LaTeX style preview.sty from preview-latex is used with the active option. It reports the number of pixels from the top of the image to the baseline of the image. The total height of the image is obtained as the sum of the values reported from --height and --depth.
- -l [=]num
The last page printed will be the first one numbered num. Default
is the last page in the document. If num is prefixed by an equals
sign, then it (and the argument to the -p option, if specified)
is treated as a physical (absolute) page number, rather than a value to
compare with the TeX \count0 values stored in the DVIfile. Thus, using -l =9 will end with the ninth page of the document, no matter what the pages are actually numbered.
- --mode mode
This option only has an effect when using bitmapped (PK) fonts. Use mode as the Metafont device name for thePKfonts (both for path searching and font generation). This needs to be augmented with the base device resolution, given with the --bdpi option. See the file <ftp://ftp.tug.org/tex/modes.mf> for a list of resolutions and mode names for most devices.
This option only has an effect when using bitmapped (PK) fonts. It turns off automaticPKfont generation (mktexpk).
- This switch prohibits the internal call to GhostScript for displaying PostScript specials. --nogs0 turns the call back on.
- Normally, if GhostScript is used to render PostScript specials, the GhostScript interpreter is run with the option -dSAFER. The --nogssafer option runs GhostScript without -dSAFER. The -dSAFER option in Ghostscript disables PostScript operators such as deletefile, to prevent possibly malicious PostScript programs from having any effect.
- Some packages generate raw PostScript specials, even non-rendering such specials. This switch turns off the internal call to GhostScript intended to display these raw PostScript specials. --norawps0 turns the call back on.
- -o name
Send output to the file name. A single occurrence of %d or
%01d, ..., %09d will be exchanged for the physical
page number (this can be changed, see the --dvinum switch). The
default output filename is file%d.png where the input DVIfile was file.dvi.
- -O x-offset,y-offset
- Move the origin by x-offset,y-offset, a comma-separated pair of dimensions such as .1in,-.3cm. The origin of the page is shifted from the default position (of one inch down, one inch to the right from the upper left corner of the paper) by this amount.
- -p [=]num
The first page printed will be the first one numbered num. Default
is the first page in the document. If num is prefixed by an
equals sign, then it (and the argument to the -l option, if
specified) is treated as a physical (absolute) page number, rather than
a value to compare with the TeX \count0 values stored in the
DVIfile. Thus, using -p =3 will start with the third page of the document, no matter what the pages are actually numbered.
When an external image is included, dvipng will automatically
switch to truecolor mode, to avoid unnecessary delay and quality
reduction, and enable the EPStranslator to draw on a transparent background and outside of the boundingbox. This switch will force palette (256-color) output and make dvipng revert to opaque clipped image inclusion. This will also override the --truecolor switch if present.
No images are output when a warning occurs. Normally, dvipng will
output an image in spite of a warning, but there may be something
missing in this image. One reason to use this option would be if you
have a more complete but slower fallback converter. Mainly, this is
useful for failed figure inclusion and unknown \special occurrences,
but warnings will also occur for missing or unknown color specs and
The images are output in the PNGformat. This is the default for the dvipng binary. See also the --gif option.
- -pp firstpage-lastpage
Print pages firstpage through lastpage; but not quite
equivalent to -p firstpage -l lastpage. For example,
when rendering a book, there may be several instances of a page in the
DVIfile (one in "\frontmatter", one in "\mainmatter", and one in "\backmatter"). In case of several pages matching, -pp firstpage-lastpage will render all pages that matches the specified range, while -p firstpage -l lastpage will render the pages from the first occurrence of firstpage to the first occurrence of lastpage. This is the (undocumented) behaviour of dvips. In dvipng you can give both kinds of options, in which case you get all pages that matches the range in -pp between the pages from -p to -l. Also multiple -pp options accumulate, unlike -p and -l. The - separator can also be :. Note that -pp -1 will be interpreted as ``all pages up to and including 1'', if you want a page numbered -1 (only the table of contents, say) put -pp -1--1, or more readable, -pp -1:-1.
- Run quietly. Don't chatter about pages converted, etc. to standard output; report no warnings (only errors) to standard error.
- -Q num
Set the quality to num. That is, choose the number of antialiasing
levels for bitmapped fonts (PK), to be num*num+1. The default value is 4 which gives 17 levels of antialiasing for antialiased fonts from these two. If FreeType is available, its rendering is unaffected by this option.
Toggle output of pages in reverse/forward order. By default, the first
page in the DVIis output first.
- The program exits when a warning occurs. Normally, dvipng will output an image in spite of a warning, but there may be something missing in this image. One reason to use this option would be if you have a more complete but slower fallback converter. See the --picky option above for a list of when warnings occur.
- -T image_size
Set the image size to image_size which can be either of
bbox, tight, or a comma-separated pair of dimensions
hsize,vsize such as .1in,.3cm. The default is
bbox which produces a PNGthat includes all ink put on the page and in addition theDVIorigin, located 1in from the top and 1in from the left edge of the paper. This usually gives whitespace above and to the left in the produced image. The value tight will make dvipng only include all ink put on the page, producing neat images.
This will make dvipng generate truecolor output. Note that
truecolor output is automatic if you include an external image in your
DVI,e.g., via a PostScript special (i.e., the graphics or graphicx package). This switch is overridden by the --palette switch.
- Enable verbose operation. This will currently indicate what fonts is used, in addition to the usual output.
- Report the width of the image. See also --height and --depth.
- -x num
This option is deprecated; it should not be used. It is much better to
select the output resolution directly with the -D option. This
option sets the magnification ratio to num/1000 and
overrides the magnification specified in the DVIfile. Must be between 10 and 100000. It is recommended that you use standard magstep values (1095, 1200, 1440, 1728, 2074, 2488, 2986, and so on) to help reduce the total number ofPKfiles generated. num may be a real number, not an integer, for increased precision.
- -z num
Set the PNGcompression level to num. This option is enabled if your libgd is new enough. The default compression level is 1, which selects maximum speed at the price of slightly larger PNGs. For an older libgd, the hard-soldered value 5 is used. The include file png.h says ``Currently, valid values range from 0 - 9, corresponding directly to the zlib compression levels 0 - 9 (0 - no compression, 9 - ''maximal`` compression). Note that tests have shown that zlib compression levels 3-6 usually perform as well as level 9 forPNGimages, and do considerably fewer calculations. In the future, these values may not correspond directly to the zlib compression levels.''
NOTESThe full manual is accessible in info format, on most systems by typing
COPYRIGHTThis program is released under the
Copyright (c) 2002-2015 Jan-AAke Larsson