. grops - PostScript driver for groff . .
2. SYNOPSIS ▲
. .SY grops .OP -glmv .OP -b n .OP -c n .OP -F dir .OP -I dir .OP -p papersize .OP -P prologue .OP -w n [ files . . . ] .YS .
It is possible to have whitespace between a command line option and its parameter. . .
3. DESCRIPTION ▲
grops translates the output of GNU
troff to PostScript. . Normally
grops should be invoked by using the groff command with a
-Tps option. . . If no files are given,
grops reads the standard input. . A filename of
- also causes
grops to read the standard input. . PostScript output is written to the standard output. . When
grops is run by
groff options can be passed to
R groff 's
-P option. .
grops doesn't produce a valid document structure (conforming to the Document Structuring Convention) if called with multiple file arguments. . To print such concatenated output it is necessary to deactivate DSC handling in the printing program or previewer. . See section
FONT INSTALLATION below for a guide how to install fonts for
R grops . . .
4. OPTIONS ▲
- -b n
Provide workarounds for older printers, broken spoolers, and previewers. . Normally
grops produces output at PostScript LanguageLevel\~2 that conforms to the Document Structuring Conventions version 3.0. . Some older printers, spoolers, and previewers can't handle such output. . The value of\~\c n controls what
grops does to make its output acceptable to such programs. . A value of\~0 causes grops not to employ any workarounds. .
Add\~1 if no
%%EndDocumentSetup comments should be generated; this is needed for early versions of TranScript that get confused by anything between the
%%EndProlog comment and the first
%%Page comment. .
Add\~2 if lines in included files beginning with
%! should be stripped out; this is needed for Sun's pageview previewer. .
R %%Page ,
R %%Trailer and
%%EndProlog comments should be stripped out of included files; this is needed for spoolers that don't understand the
%%EndDocument comments. .
Add\~8 if the first line of the PostScript output should be
%!PS-Adobe-2.0 rather than
R %!PS-Adobe-3.0 ; this is needed when using Sun's Newsprint with a printer that requires page reversal. .
Add\~16 if no media size information should be included in the document (this is, neither use
%%DocumentMedia nor the
setpagedevice PostScript command). . This was the behaviour of groff version 1.18.1 and earlier; it is needed for older printers which don't understand PostScript LanguageLevel\~2. . It is also necessary if the output is further processed to get an encapsulated PS (EPS) file \[en] see below. .
The default value can be specified by a .
broken n .
command in the DESC file. . Otherwise the default value is\~0. .
- -c n
Print n copies of each page. .
- -F dir
Prepend directory .IB dir /dev name to the search path for prologue, font, and device description files; name is the name of the device, usually
R ps . .
Guess the page length. . This generates PostScript code that guesses the page length. . The guess is correct only if the imageable area is vertically centered on the page. . This option allows you to generate documents that can be printed both on letter (8.5\[mu]11) paper and on A4 paper without change. .
- -I dir
This option may be used to add a directory to the search path for files on the command line and files named in
\[rs]X'ps: import' and
\[rs]X'ps: file' escapes. . The search path is initialized with the current directory. . This option may be specified more than once; the directories are then searched in the order specified (but before the current directory). . If you want to make the current directory be read before other directories, add
-I. at the appropriate place. .
No directory search is performed for files with an absolute file name. .
Print the document in landscape format. .
Turn manual feed on for the document. .
- -p paper-size
Set physical dimension of output medium. . This overrides the
R papersize ,
R paperlength , and
paperwidth commands in the
DESC file; it accepts the same arguments as the
papersize command. . See
groff_font (5) for details. .
- -P prologue-file
Use the file prologue-file (in the font path) as the prologue instead of the default prologue file
R prologue . . This option overrides the environment variable GROPS_PROLOGUE. .
- -w n
Lines should be drawn using a thickness of n \~\c thousandths of an em. . If this option is not given, the line thickness defaults to 0.04\~em. .
Print the version number. . .
5. USAGE ▲
. The input to
grops must be in the format output by
R troff (1). . This is described in
R groff_out (5). .
In addition, the device and font description files for the device used must meet certain requirements: . The resolution must be an integer multiple of\~72 times the
R sizescale . . The
ps device uses a resolution of 72000 and a sizescale of 1000. .
The device description file must contain a valid paper size; see
R groff_font (5) for more information. .
Each font description file must contain a command
which says that the PostScript name of the font is psname . . It may also contain a command
which says that the PostScript font should be reencoded using the encoding described in enc_file ; this file should consist of a sequence of lines of the form:
.I pschar code
where pschar is the PostScript name of the character, and code is its position in the encoding expressed as a decimal integer; valid values are in the range 0 to\~255. . Lines starting with
# and blank lines are ignored. . The code for each character given in the font file must correspond to the code for the character in encoding file, or to the code in the default encoding for the font if the PostScript font is not to be reencoded. . This code can be used with the
\[rs]N escape sequence in
troff to select the character, even if the character does not have a groff name. . Every character in the font file must exist in the PostScript font, and the widths given in the font file must match the widths used in the PostScript font. .
grops assumes that a character with a groff name of
space is blank (makes no marks on the page); it can make use of such a character to generate more efficient and compact PostScript output. .
grops is able to display all glyphs in a PostScript font, not only 256. enc_file (or the default encoding if no encoding file specified) just defines the order of glyphs for the first 256 characters; all other glyphs are accessed with additional encoding vectors which
grops produces on the fly. .
grops can automatically include the downloadable fonts necessary to print the document. . Such fonts must be in PFA format. . Use
R pfbtops (1) to convert a Type\~1 font in PFB format. . Any downloadable fonts which should, when required, be included by
grops must be listed in the file
R /usr/share/groff/1.20.1/font/devps/download ; this should consist of lines of the form .
.I font filename .
where font is the PostScript name of the font, and filename is the name of the file containing the font; lines beginning with
# and blank lines are ignored; fields may be separated by tabs or spaces; filename is searched for using the same mechanism that is used for groff font metric files. . The
download file itself is also searched for using this mechanism; currently, only the first found file in the font path is used. .
If the file containing a downloadable font or imported document conforms to the Adobe Document Structuring Conventions, then
grops interprets any comments in the files sufficiently to ensure that its own output is conforming. . It also supplies any needed font resources that are listed in the
download file as well as any needed file resources. . It is also able to handle inter-resource dependencies. . For example, suppose that you have a downloadable font called Garamond, and also a downloadable font called Garamond-Outline which depends on Garamond (typically it would be defined to copy Garamond's font dictionary, and change the PaintType), then it is necessary for Garamond to appear before Garamond-Outline in the PostScript document. .
grops handles this automatically provided that the downloadable font file for Garamond-Outline indicates its dependence on Garamond by means of the Document Structuring Conventions, for example by beginning with the following lines .
%%DocumentNeededResources: font Garamond
%%IncludeResource: font Garamond .
In this case both Garamond and Garamond-Outline would need to be listed in the
download file. . A downloadable font should not include its own name in a
%%DocumentSuppliedResources comment. .
grops does not interpret
%%DocumentFonts comments. . The
R %%DocumentNeededResources ,
R %%DocumentSuppliedResources ,
R %%IncludeResource ,
R %%BeginResource , and
R %%EndResource comments (or possibly the old
R %%DocumentNeededFonts ,
R %%DocumentSuppliedFonts ,
R %%IncludeFont ,
R %%BeginFont , and
R %%EndFont comments) should be used. .
In the default setup there are styles called
R R ,
R I ,
R B , and
BI mounted at font positions 1 to\~4. . The fonts are grouped into families
R A ,
R BM ,
R C ,
R H ,
R HN ,
R N ,
R P , and\~\c
T having members in each of these styles: .
AI AvantGarde-BookOblique .
AB AvantGarde-Demi .
ABI AvantGarde-DemiOblique .
BMR Bookman-Light .
BMI Bookman-LightItalic .
BMB Bookman-Demi .
BMBI Bookman-DemiItalic .
CR Courier .
CI Courier-Oblique .
CB Courier-Bold .
CBI Courier-BoldOblique .
HR Helvetica .
HI Helvetica-Oblique .
HB Helvetica-Bold .
HBI Helvetica-BoldOblique .
HNR Helvetica-Narrow .
HNI Helvetica-Narrow-Oblique .
HNB Helvetica-Narrow-Bold .
HNBI Helvetica-Narrow-BoldOblique .
NR NewCenturySchlbk-Roman .
NI NewCenturySchlbk-Italic .
NB NewCenturySchlbk-Bold .
NBI NewCenturySchlbk-BoldItalic .
PR Palatino-Roman .
PI Palatino-Italic .
PB Palatino-Bold .
PBI Palatino-BoldItalic .
TR Times-Roman .
TI Times-Italic .
TB Times-Bold .
TBI Times-BoldItalic .
There is also the following font which is not a member of a family: .
There are also some special fonts called
S for the PS Symbol font, and
R SS , containing slanted lowercase Greek letters taken from PS Symbol. . Zapf Dingbats is available as
R ZD , and a reversed version of ZapfDingbats (with symbols pointing in the opposite direction) is available as
R ZDR ; most characters in these fonts are unnamed and must be accessed using
R \[rs]N . .
The default color for
\[rs]M is black; for colors defined in the `rgb' color space
setrgbcolor is used, for `cmy' and `cmyk'
R setcmykcolor , and for `gray'
R setgray . . Note that
setcmykcolor is a PostScript LanguageLevel\~2 command and thus not available on some older printers. .
grops understands various X\~commands produced using the
\[rs]X escape sequence;
grops only interprets commands that begin with a
ps: tag. .
- \[rs]X'ps: exec code '
This executes the arbitrary PostScript commands in code . . The PostScript currentpoint is set to the position of the
\[rs]X command before executing code . . The origin is at the top left corner of the page, and y\~coordinates increase down the page. . A procedure\~\c
u is defined that converts groff units to the coordinate system in effect (provided the user doesn't change the scale). . For example, .
\[rs]X'ps: exec \[rs]nx u 0 rlineto stroke'
draws a horizontal line one inch long. . code may make changes to the graphics state, but any changes persist only to the end of the page. . A dictionary containing the definitions specified by the
mdef is on top of the dictionary stack. . If your code adds definitions to this dictionary, you should allocate space for them using \[rs]X'ps mdef n '\fR. . Any definitions persist only until the end of the page. . If you use the
\[rs]Y escape sequence with an argument that names a macro, code can extend over multiple lines. . For example, .
ps: exec \[rs]nx u
0rlineto stroke .. \[rs]Yy
is another way to draw a horizontal line one inch long. . Note the single backslash before `nx' \[en] the only reason to use a number register while defining the macro `y' is to convert a user-specified dimension `1i' to internal groff units which are in turn converted to PS units with the
u procedure. .
grops wraps user-specified PostScript code into a dictionary, nothing more. . In particular, it doesn't start and end the inserted code with
R restore , respectively. . This must be supplied by the user, if necessary. . .
- \[rs]X'ps: file name '
This is the same as the
exec command except that the PostScript code is read from file name . .
- \[rs]X'ps: def code '
Place a PostScript definition contained in code in the prologue. . There should be at most one definition per
\[rs]X command. . Long definitions can be split over several
\[rs]X commands; all the code arguments are simply joined together separated by newlines. . The definitions are placed in a dictionary which is automatically pushed on the dictionary stack when an
exec command is executed. . If you use the
\[rs]Y escape sequence with an argument that names a macro, code can extend over multiple lines. .
- \[rs]X'ps: mdef n code '
R def , except that code may contain up to n \~\c definitions. .
grops needs to know how many definitions code contains so that it can create an appropriately sized PostScript dictionary to contain them. .
- \[rs]X'ps: import file llx lly urx ury width \fR[\fP height \fR]\fP '
Import a PostScript graphic from file . . The arguments llx , lly , urx , and ury give the bounding box of the graphic in the default PostScript coordinate system; they should all be integers; llx and lly are the x and y\~coordinates of the lower left corner of the graphic; urx and ury are the x and y\~coordinates of the upper right corner of the graphic; width and height are integers that give the desired width and height in groff units of the graphic. .
The graphic is scaled so that it has this width and height and translated so that the lower left corner of the graphic is located at the position associated with
\[rs]X command. . If the height argument is omitted it is scaled uniformly in the x and y\~directions so that it has the specified width. .
Note that the contents of the
\[rs]X command are not interpreted by
R troff ; so vertical space for the graphic is not automatically added, and the width and height arguments are not allowed to have attached scaling indicators. .
If the PostScript file complies with the Adobe Document Structuring Conventions and contains a
%%BoundingBox comment, then the bounding box can be automatically extracted from within groff by using the
psbb request. .
R groff_tmac (5) for a description of the
PSPIC macro which provides a convenient high-level interface for inclusion of PostScript graphics. .
\[rs]X'ps: endinvis' No output is generated for text and drawing commands that are bracketed with these
\[rs]X commands. . These commands are intended for use when output from
troff is previewed before being processed with
R grops ; if the previewer is unable to display certain characters or other constructs, then other substitute characters or constructs can be used for previewing by bracketing them with these
\[rs]X commands. .
gxditview is not able to display a proper
\[rs](em character because the standard X11 fonts do not provide it; this problem can be overcome by executing the following request .
In this case,
gxditview is unable to display the
\[rs](em character and draws the line, whereas
grops prints the
\[rs](em character and ignores the line (this code is already in file
Xps.tmac which is loaded if a document intended for
grops is previewed with
R gxditview ). .
If a PostScript procedure
BPhook has been defined via a ` ps: def ' or ` ps: mdef ' device command, it is executed at the beginning of every page (before anything is drawn or written by groff). For example, to underlay the page contents with the word `DRAFT' in light gray, you might use
9setgray clippath pathbbox exch
5mul exch .
5mul translate atan rotate pop pop
200scalefont setfont (DRAFT) dup stringwidth pop
70moveto show grestore
}def .. .devicem XX
Or, to cause lines and polygons to be drawn with square linecaps and mitered linejoins instead of the round linecaps and linejoins normally used by
R grops , use
}def .. .devicem XX
(square linecaps, as opposed to butt linecaps (0 setlinecap), give true corners in boxed tables even though the lines are drawn unconnected). . .
5.1. Encapsulated PostScript ▲
grops itself doesn't emit bounding box information. . With the help of Ghostscript the following simple script,
R groff2eps , produces an encapsulated PS file. .
1.bbox cat $
1.eps rm $
Just say .
groff2eps foo .
to convert file
R foo.eps . . .
5.2. TrueType and other font formats ▲
TrueType fonts can be used with
grops if converted first to
Type\~42 format, a special PostScript wrapper equivalent to the PFA format mentioned in
R pfbtops (1). . There are several different methods to generate a type42 wrapper and most of them involve the use of a PostScript interpreter such as Ghostscript \[en] see
R gs (1). .
Yet, the easiest method involves the use of the application
R ttftot42 (1). . This program uses
R freetype (3) (version 1.3.1) to generate type42 font wrappers and well-formed AFM files that can be fed to the
R afmtodit (1) script to create appropriate metric files. . The resulting font wrappers should be added to the
6. FONT INSTALLATION ▲
. This section gives a summary of the above explanations; it can serve as a step-by-step font installation guide for
R grops . . .LI Convert your font to something groff understands. . This is either a PostScript Type\~1 font in PFA format or a PostScript Type\~42 font, together with an AFM file. .
The very first characters in a PFA file look like this: .
A PFB file has this also in the first line, but the string is preceded with some binary bytes. .
The very first characters in a Type\~42 font file look like this: .
This is a wrapper format for TrueType fonts. . Old PS printers might not support it (this is, they don't have a built-in TrueType font interpreter). .
If your font is in PFB format (such fonts normally have `.pfb' as the file extension), you might use groff's
R pfbtops (1) program to convert it to PFA. . For TrueType fonts, try
R fontforge . For all other font formats use
fontforge which can convert most outline font formats. . .LI Convert the AFM file to a groff font description file with the
R afmtodit (1) program. . An example call is .
afmtodit Foo-Bar-Bold.afm textmap FBB .
which converts the metric file `Foo-Bar-Bold.afm' to the groff font `FBB'. . If you have a font family which comes with normal, bold, italic, and bold italic faces, it is recommended to use the letters
R R ,
R B ,
R I , and
R BI , respectively, as postfixes in the groff font names to make groff's `.fam' request work. . An example is groff's built-in Times-Roman font: The font family name is
R T , and the groff font names are
R TR ,
R TB ,
R TI , and
R TBI . . .LI Install both the groff font description files and the fonts in a `devps' subdirectory of the font path which groff finds. . See the
ENVIRONMENT section in the
R troff (1) man page which lists the actual value of the font path. . Note that groff doesn't use the AFM files (but it is a good idea to store them anyway). . .LI Register all fonts which must be downloaded to the printer in the `devps/download' file. . Only the first occurrence of this file in the font path is read. . This means that you should copy the default `download' file to the first directory in your font path and add your fonts there. . To continue the above example we assume that the PS font name for Foo-Bar-Bold.pfa is `XY-Foo-Bar-Bold' (the PS font name is stored in the
internalname field in the `FBB' file), thus the following line should be added to `download'. .
XY-Foo-Bar-Bold Foo-Bar-Bold.pfa . . .
7. OLD FONTS ▲
. groff versions 1.19.2 and earlier contain a slightly different set of the 35 Adobe core fonts; the difference is mainly the lack of the `Euro' glyph and a reduced set of kerning pairs. . For backwards compatibility, these old fonts are installed also in the .
R /usr/share/groff/1.20.1/oldfont/devps .
To use them, make sure that
grops finds the fonts before the default system fonts (with the same names): Either add command line option
groff -Tps -P-F -P/usr/share/groff/1.20.1/oldfont . . . .
or add the directory to groff's font path environment variable .
GROFF_FONT_PATH=/usr/share/groff/1.20.1/oldfont . .
8. ENVIRONMENT ▲
.B GROPS_PROLOGUE If this is set to foo , then
grops uses the file foo (in the font path) instead of the default prologue file
R prologue . . The option
-P overrides this environment variable. . .
.B GROFF_FONT_PATH A list of directories in which to search for the dev name directory in addition to the default ones. . See
R troff (1) and
R groff_font (5) for more details. . .
9. FILES ▲
. .Tp +2n
/usr/share/groff/1.20.1/font/devps/DESC Device description file. .
- /usr/share/groff/1.20.1/font/devps/ F
Font description file for font F . .
List of downloadable fonts. .
Encoding used for text fonts. .
Macros for use with
R grops ; automatically loaded by
R troffrc .
PSPIC macro, automatically loaded by
R ps.tmac . .
Macros to disable use of characters not present in older PostScript printers (e.g., `eth' or `thorn'). .
- /tmp/grops XXXXXX
Temporary file. . .
10. SEE ALSO ▲
R afmtodit (1),
R groff (1),
R troff (1),
R pfbtops (1),
R groff_out (5),
R groff_font (5),
R groff_char (7),
R groff_tmac (5) .
http://partners.adobe.com/public/developer/en/ps/5001.DSC_Spec.pdf PostScript Language Document Structuring Conventions Specification . .