hp2xx(1)hp2xx(1)NAMEhp2xx - A HPGL converter into some vector- and raster formats
USAGEhp2xx [-options] [hpgl-file(s)]
OPTION SUMMARY
Option Format Default Description
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General options:
-c char * 11111111 Pen color(s). Valid: 1 to 8 digits of 0-7 each.
0=off, 1=black, 2=red, 3=green, 4=blue, 5=cyan,
6=magenta, 7=yellow.
-f char * "" Name of output file. "" = autom., "-" = stdout
-l char * "" Name of optional log file
-m char * pre Mode. Valid (some are compile-time options):
mf,cad,dxf,em,emf,epic,eps,escp2,fig,jpg,gpt,hpgl,
rgip,pcl,pcx,pic,img,pbm,png,pre,svg,tiff,pdf,nc
-p char * 11111111 Pensize(s) [dots] (default), [1/10 mm] (mf, ps).
Valid: 1 to 8 digits of 0-9 (or characters A-Z for
widths beyond 0.9mm) each.
-P int 0:0 Selected page range (m:n) (0 = 0:0 = all pages)
-q off Quiet mode. No diagnostic output.
-r double 0.0 Rotation angle [deg]. -r90 gives landscape
-s char * hp2xx.swp Name of swap file
Size controls:
-a double 1.0 Aspect factor. Valid: > 0.0
-h double 200 Height [mm] of picture
-w double 200 Width [mm] of picture
-x double - Preset xmin value of HPGL coordinate range
-X double - Preset xmax value of HPGL coordinate range
-y double - Preset ymin value of HPGL coordinate range
-Y double - Preset ymax value of HPGL coordinate range
-z double 1.0 Z engagement (working depth) (used in nc output only)
-Z double -1.0 Z retraction depth (used in nc output only)
-t off True size mode. Inhibits effects of -a -h -w
HPGL handling controls:
-n off No filling of polygons; draws outline instead
-N off Ignore PS commands, calculate plot size as needed
-e int 0 Extend IW clipping limits by given amount
-M int 0 Remap pen no.0 commands to given pen
Raster format controls:
-d int 75 DPI value (x or both x&y)
-D int 75 DPI value (y only)
PCL only:
-F off Send a FormFeed after graphics data
-i off Pre-initialize printer
-S int 0 (Deskjet) Special commands: 0=off,1=b/w,3=CMY,4=CMYK
-d (see above) Valid ONLY 300, 150, 100, 75
-D (see above) INVALID for PCL!
EPS, PCL, and some previews:
-o double 0.0 x offset [mm] of picture (left margin)
-O double 0.0 y offset [mm] of picture (upper margin)
-C Modify -o -O to center picture within -w -h frame
TIFF only:
-S int 0 Compression: 0/1=off,2=RLE,3=G3FAX,4=G4FAX,
6=OJPEG,7=JPEG,8=deflate
Preview on PC's (DOS):
-V int 18 VGA mode byte (decimal)
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-H Show help.
DESCRIPTIONhp2xx reads HPGL ASCII source files, interprets them, and converts them
into either another vector-oriented format or one of several raster‐
file formats. Currently, its HPGL parser recognizes a large subset of
HPGL/2. Some high-level functions related to polygon filling are miss‐
ing. Also, only some of the fixed space vector fonts and none of the
variable space arc fonts are supported. Beside these limitations, hp2xx
has proven to work with many HP-GL sources without any trouble.
GENERAL OPTIONShp2xx reads from stdin or from a file if any given on the command line.
If no output file name is given (default), the output automatically
goes into a file whose name is derived from the input file name and the
current mode. For example, hp2xx-m pcl foo.hpgl writes the output to a
file "foo.pcl". Use option -f outfile to specify your output file name
explicitly, or -I -f- to write to stdout, e.g. when piping into a
queue.
The program scans the current HPGL source, converts all drawing com‐
mands into elementary vectors, saves these in a temporary file, and
concurrently determines the maximum coordinate range used. It then pro‐
cesses the vectors by mapping them into a user-defined coordinate sys‐
tem, preserving the aspect ratio of the original data.
This coordinate system by default fits into a window of size 200 mm by
200 mm. To change the size of this bounding window, use -h height and
-w width to set the (max.) desired height and width of your output pic‐
ture; optionally use -a aspectfactor to alter the aspect ratio by the
given factor (aspectfactor < 1 narrows your picture). The generated
picture will always fit into the window defined by -h height and -w
width, padded with background color at the lower or right margin if
needed.
A second way of defining sizes is relying on the size the picture would
actually show if plotted on a sheet of paper by a HP-compatible plot‐
ter. By activating flag -I -t (true size), options -a, -h, and -w are
ignored, and the sizes are derived from the HP-GL file assuming that 1
HP unit = 1/40 mm.
Option -r rotation_angle (in degrees) allows you to rotate the object
prior to all scaling operations. Its main use is to facilitate land‐
scape format: -r90 rotates your whole picture, e.g. from portait to
landscape format. However, any reasonable rotation angle is valid.
By naming a file with option -l log_file you can redirect the diagnos‐
tic outputs into the given file, even without a redirection mechanism
for stderr like in UNIX shells (e. g., DOS). Option -q (quiet) gets
rid of them completely.
If you need to process a series of similar objects which should be
translated into exactly the same coordinate system, there is a way to
override the auto-scaling: First, run all files separately and note the
infos on the used coordinate ranges. Then, pick a range that will cover
ALL your pictures. You can now assign defaults to the internally gen‐
erated range limits by specifying -x xmin, -X xmax, -y ymin, and -Y
ymax. NOTE: Clipping is only supported via the IW command ! If any
picture coordinate exceeds your limits, they will be overwritten.
Use option -m mode to select the program mode, i.e. the output format.
Currently supported: mode = "mf" (Metafont), "em" (emTeX cial{} com‐
mands), "epic" (line drawing using TeX macros within epic.sty), "eps"
(PostScript), "dxf" (Autocad), "emf/emp" (MS Enhanced Metafile / Print‐
ing - available in Windows-built executables only), "svg" (Scalable
Vector Graphics), "fig" (XFig 3.2), "gpt" (GnuPlot ascii), "hpgl" (sim‐
plified HP-GL, e.g. for import tasks), "pcl" (HP-PCL Level 3 format
(suitable for printing on a HP Laserjet II, DeskJet, or compatible
printer), "escp2" (Epson Esc/P2 printer commands, suitable for printing
on Epson Stylus models), "img" (GEMs IMG format), "jpg" (JPEG image),
"pdf" (Adobe Portable Document format), "pbm" (Portable Bit Map / Por‐
table PixMap for color plots), "pcx" (PC-Paintbrush format, also
accepted by MS-Paintbrush / Windows 3.0 and many other PC based pixel
renderers), "png" (Portable Network Graphics format), "nc" (CNC G-code,
for engravings), or "rgip" (Uniplex RGIP). There is also a preview
option "pre" which supports VGA cards (DOS), ATARI, AMIGA, X11 servers,
and Sunview. Default mode is "pre". (As some of these modes rely on
external libraries, they may not be builtin by default, and not be
available in prebuilt binaries supplied e.g. in Linux distributions.
The usage messsage generated when hp2xx is invoked without parameters
will always list exactly those modes that are actually available.)
If you use a raster format, the picture is rasterized by default into a
75 DPI resolution image. Use option -d DPI_value to change the resolu‐
tion, e.g. -d300 will cause a HP LJ-II compatible 300 dpi rasteriza‐
tion. There is a way of specifying a different resolution for y direc‐
tion: -D DPI_y_value
Some programs were found to generate HPGL output with too tight clip‐
ping bounds, which lead, for example, to some parts of text characters
clipped off. Use option -e extraclip to add some extra amount of space
to clip areas to workaround such mistakes. For example, -e 40 will add
40 extra plotter units to every side of clipping box which is 1 mm in
true size.
While processing large pictures at high resolution on low-memory
machines, typically under DOS, the program may start swapping. Option‐
ally change the swap file by using -s swapfile, e.g. to speed up pro‐
cessing by swapping to a RAM disk.
Unless the hpgl file specifies its own selection of pen widths and col‐
ors (for up to 256 pens), a carousel of 8 pens is simulated. You can
specify pen sizes and colors for each of these pens via options -p
string and -c string. "string" must consist of 1..8 digits (0-9 for
size, 0-7 for color). Digit number n (counting from left) corresponds
to pen number n. The digit value is this pen's color or size in inter‐
nal units. The pen width unit corresponds to 1/10 mm - using pen
widths beyond 0.9mm is possible by using the letters of the latin
alphabet, so that A=1mm, B=1.1mm etc. The default size is 1 for all
pens. Colors are assigned according to: 0=off, 1=black, 2=red,
3=green, 4=blue, 5=cyan, 6=magenta, 7=yellow. Examples of use:
-p22222222 -c33333333 changes all pensizes to 2 units, all colors to
green -p302-c407 makes pen #1 a blue pen of size 3 , pen #3 a yellow
pen of size 2, suppresses all drawing with pen #2, and keeps all other
pen sizes and colors. Setting either -p or -c will override the equiv‐
alent HPGL/2 commands (PC,PW) in the HP-GL file.
Sometimes, HP-GL files contain several pages of plotter output. hp2xx
recognizes the HP-GL commands for "feed-forward", "pause" or "new
page", and by default draws each image as a separate page (saving to
sequentially numbered output files, or opening a new preview window for
each). You can select any particular page range by using option -P
firstpage:lastpage which causes hp2xx to skip all drawing commands
except those on the given pages. Please note that even if only a sin‐
gle page is actually drawn, hp2xx will nonetheless process the whole
HP-GL file. This makes sure that effects of early pages on internal
modes indeed influence later pages, as on a real plotter.
VECTOR FORMATS
Supported vector formats are: TeX/Metafont, emTex-specials, TeX/epic-
Macros, Autocad DXF CNC G-code XFig 3.2, GnuPlot ASCII, Simplified
HP_GL, Uniplex RGIP Scalable Vector Graphics (SVG) Adobe PDF(if libpdf
is available) and -I PostScript. Use -m mf to convert a HPGL drawing
into a Metafont character to be included into a TeX document as the
character "Z" of a special font that you may create. Edit the metafont
source, e.g., to change the letter "Z" for another, or to change the
line thickness, which is set to 0.4pt by default. The other TeX-
related modes ("cad" for TeXcad compatible code, "em" for employing
cial{em:line} macros, and "epic" for drawing lines with macros from
"epic.sty") address different compromises to cope with TeX's poor line
drawing capability and are generally not recommended nor fully sup‐
ported. Feel free to experiment with them -- they generate ASCII output
that should be "input" into TeX/LaTeX documents.
Use option -ppensize(s) for control over pensize: The actual Metafont
or PostScript pensize will be "pensize * 0.1 mm", with pensize = 0 - 9
(0 = no drawing). The same applies to
In PostScript mode (-m eps), you may also need to use options -o and -O
(see below) for proper margins on paper since hp2xx puts your picture
"flush" to the left and upper paper limit by default.
RASTER FORMATS
The following formats are supported: HP-PCL, Esc/P2, PCX, PIC, IMG,
JPG, PBM/PPM, PNG, TIFF, and previews. (PNG and TIFF formats rely on
external libpng,zlib and libtiff, JPG relies on libjpeg. Versions built
on MS windows systems - or versions linked against libEMF on other
platforms - may additionally support EMF generation and printing.)
Addition of other formats is made easy for programmers because of
hp2xx's modular structure. The program allocates a bitmap on a line-by-
line basis, swapping lines to disk if needed, and plots into this bit‐
map. Depending on the selected format, a conversion module is then
activated, which can easily be replaced by other converters. Add more
formats if you like!
Option -ppensize(s) controls the size (in pixels) of the virtual plot‐
ting pen. The only implemented shape of the pen tip is a square of the
given length. pen sizes of 5...9 units will be acccepted but replaced
by 4 units. Specifying -p4 when in 75 DPI mode will make pretty clumsy
pictures, while you may prefer -p2 over -p1 when in 300 DPI.
PCX: The size of a PCX picture is controlled via its specified height
and the current DPI value. To create a high-resolution PCX image, just
increase the DPI value as desired. PCX format does not accept offsets.
IMG: See PCX.
PBM/PPM: See PCX for options. If your hpgl file is not monochrome,
hp2xx will automatically create a PPM (portable pixmap) file instead of
a PBM bitmap. (Use -c11111111 to force generation of PBM from a color
hpgl file). Depending on the compile-time option PBM_ASCII, hp2xx will
create ascii or binary pbm (ppm) files - usually the more efficient
binary format should be preferred.
(Unsupported options) PIC, PAC: ATARI ST screens (640x400 pixels) can
easily be dumped to files. Programs such as STAD accept graphics by
including such screen dump files. Graphics filling more than one
screenful may be split into screen-size blocks and loaded/mounted
blockwise. hp2xx converts to ATARI bitmap format by trying to fit the
resulting picture into a single screen equivalent (max. 400 rows, max.
80 Bytes (640 pixel) per row). If it succeeds, hp2xx produces a single
output file. Specify ONLY its base name (option -f), since hp2xx adds
the file extension ".pic" or ".pac" automatically. Do NOT try to work
on more than one HPGL file simultaneously! Do NOT use more than 6 char‐
acters for the file name, and avoid digits. If more screen blocks are
required horizontally and/or vertically, hp2xx will automatically split
the picture into separate files, counting them columnwise (top-to-bot‐
tom and left-to-right), adding a two-digit number to the given file
name. A maximum of 10 columns is supported. The picture is padded with
background color at its right and lower margins, if needed. PAC fea‐
tures file compression, PIC does not.
PCL: HP-PCL Level 3 format, most useful for direct printer output. Due
to this action, there have been added some extra flags and options: Use
flag -i to send a printer initialization sequence before the actual
image. Among other things, this will instruct the printer which paper
size to use. Flag -F adds a Form Feed (FF, hex 0C) after the image is
completed, which is what you may want most of the time. However, over‐
lay printing of several files is feasible by omitting -F.
For additional control of the picture's final position on paper, you
may add x or y offsets using -o X_offset or -O Y_offset. E.g., -o 20 -O
30 will give you 30 mm additional top margin and 20 mm additional left
margin. Option -C modifies these offsets to center the picture within
the frame defined by -w -h.
The option -C will attempt to center the drawing on the paper automati‐
cally. Note also that hp2xx now honors any PS (page size) commands in
the hpgl file, which can also create white space around the actual
drawing.
The option -N will make hp2xx ignore any PS commands given in the hpgl
file, and recalculate the image size based on the actual geometry
instead.
The option -n will make hp2xx ignore any polygon filling commands, ren‐
dering only their outlines. This may serve both as a work-around for
hp2xx' limited polyfill support, and improve clarity of thumbnail
images of PCB designs and the like.
The option -M pennumber will remap any color or drawing commands from
pen 0 to the specified pen (which should typically be otherwise unused
in the drawing). Historically, selecting pen 0 instructed a pen plotter
to put away the pen and stop drawing, while modern inkjet plotters can
use it like any other color. Due to this ambiguity, hp2xx will draw the
background of raster graphics in the pen 0 color, unless this option is
used.
For DeskJet / DeskJet Plus / DeskJet 500 / Deskjet 550 printers, there
are some special printer commands. Activate them with option -S n. n=0
switches them off, n=1 activates black/white mode, n=3 (DJ500C and
DJ550 only) supports CMY color data, n=4 (DJ550C only) supports CMYK
color data. Any n!=0 activates PLC data compression (TIFF mode: 2).
Esc/P2: This is the control language used in the Epson Stylus family of
inkjets. hp2xx currently does not address more than one line of noz‐
zles in the print head, so printing, while exact, is extremely slow.
Users might prefer piping the output of the PostScript module through
ghostscript until this issue is resolved.
PNG: Support for the Portable Network Graphics format relies on libpng
which is available from www.libpng.org.
PRE: Preview on all machines. Use options -h -w -o -O -C to define the
screen size and position of your output (-o -O-C may not always
apply). Under X11, you can pan around an image that is larger than the
screen size by 'dragging' it with the mouse (pressing button 1 while
moving the mouse in the desired direction). Any other mouse button or
keyboard key will terminate the preview. For VGA cards (DOS), option
-V VGAmode gives you a simple way to utilize SVGA modes. Please take
care not to define larger windows than your graphics device can handle,
as the results are unpredictable. As hp2xx uses standard BIOS calls to
set pixels on VGA cards (slow but portable), you can select any hi-res
mode supported by your system by simply specifying the mode byte with
this option.
TIFF: The tagged image file format is supported by most graphics and
image manipulation programs. Support for TIFF in hp2xx relies on the
TIFF library available from www.libtiff.org, which offers several means
of image compression. The -S commandline option selects between them
as follows: -S 0 or -S 1: no compression -S 2: RLE (run length encod‐
ing) -S 3: Group 3 FAX (monochrome) -S 4: Group 4 FAX (monochrome) -S
5: GIF (not available by default, because of the UNISYS patent) -S 6:
JPEG ('old' TIFF 6.0 style) -S 7: JPEG -S 8: deflate
EXAMPLES
% hp2xx-m pcx -f my_output.pcx -d300 -p2222 -h50 -a 1.2 my_input.hp
creates a PCX file at 300 DPI of height 50 mm, using an aspect factor
of 1.2 and a pen size of 2 pixels for pens 1-4.
% my_hpgl_generator | hp2xx-f- -o20 -O30 -F -q | lpr -P my_PCL_printer
HPGL output is piped through hp2xx; the resulting PCL code is piped to
the printer queue, giving an image of height 100 mm at 75 DPI.
An additional left margin of 20mm and upper margin of 30mm is created.
A formfeed will be added (handy if your printer queue does not).
% hp2xx my_input.hp
Preview on screen or into window.
ORIGINAL AUTHOR
Heinz W. Werntges, Physikal. Biologie, Geb. 26.12,
Heinrich-Heine-Universitaet,
D-40225 Duesseldorf, Germany.
MAINTAINER SINCE V 3.30
Martin Kroeker, daVeg GmbH,
Schottener Weg 2
D-64289 Darmstadt, Germany.
mk@daveg.com or martin@ruby.chemie.uni-freiburg.de
ATARI features & PIC, PAC, IMG modes are due to Norbert Meyer, Duesseldorf.
AMIGA version & PBM mode are due to Claus Langhans, Kelkheim (Ts.)
X11 previewer is due to Michael Schoene, Duesseldorf.
Thanks for VAX support and a lot of testing to
Michael Schmitz & Gerhard Steger, Duesseldorf
Many OS/2 helps were due to Host Szillat, Berlin.
(Later contributors: See TEXINFO file).
DIAGNOSTICS
The number of ignored and/or unknown HPGL commands is given. You will
be informed if swapping starts. Progress is indicated by a logarithmic
count of internal vectors during scanning and plotting, or by dots dur‐
ing (raster mode) output, where each dot corresponds to 10 scan lines.
BUGS
There still are many non-implemented HPGL commands.
The color assignment of some X11 servers leaves something to be
desired.
Color is only partially supported (not all possible formats).
VGA preview: Color "magenta" shows as brown on some VGA cards.
To match the specified sizes on your display during preview, you may
have to calibrate it using -d-D, e.g. by overwriting the 75 DPI
default.
Only little testing has been done on TeX-related and ATARI formats, so
be prepared for bugs there, and PLEASE report them -- thank you!
SEE ALSObm2font(1), F. Sowa's raster-to-TeXfont converter.
6 May 2001 hp2xx(1)
