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Pbmtextps User Manual(0) Pbmtextps User Manual(0)
NAME
pbmtextps - render text into a PBM image using a postscript interpreter
SYNOPSIS
pbmtextps [-font fontname] [-fontsize float] [-resolution n] [-leftmar-
gin=n [-rightmargin=n [-topmargin=n [-bottommargin=n [-ascent=n [-de-
scent=n [-pad] [-crop] [-stroke n] [-verbose] [-dump-ps] text
DESCRIPTION
This program is part of Netpbm(1).
pbmtextps takes a single line of text from the command line and renders
it into a PBM image. The image is of a single line of text; newline
characters in the input have no effect.
See pbmtext for a more sophisticated generator of text, but using less
common font formats. pbmtext can generate multiple lines of text.
The -plain common option <index.html#commonoptions> has no effect be-
fore Netpbm 10.42 (March 2008). The output is always raw PBM.
Margins
By default, the image is cropped at the top and the right. It is not
cropped at the left or bottom so that the text begins at the same posi-
tion relative to the origin. The size of the default left and bottom
margins is explained below.
You can set whatever margin you want with options -leftmargin, -right-
margin, -topmargin and -bottommargin. The specified amount of white
space gets added to the far edge of type, e.g. if you specify 10 points
for -topmargin, you will get 10 points of white space above the highest
character on the line. Specify 0 to crop a side.
-ascent adds white space to the top to reach a specified distance above
the text baseline, and -descent adds white space to to the bottom to
reach a specified distance below the text baseline.
-ascent and -descent are more useful than -topmargin and -bottomargin
when you render two pieces of text (in separate invocations of pbm-
textps) that you will concatenate horizontally. With -ascent and -de-
scent, the two images will be the same height with the text baseline in
the same place. With -topmargin and -bottommargin, that may not be the
case.
Example:
$ pbmtextps -font=Times-Roman -descent=20 \
'The soup is called' > a1.pbm
$ pbmtextps -font=Itallic -descent=20 'Goulash.' > a2.pbm
$ pnmcat -lr -jb a1.pbm a2.pbm > out.pbm
If you have -ascent, there is probably no point in specifying -topmar-
gin too, but if you do, the effect is cumulative. The same is true of
-descent and -bottommargin.
-pad pads the image on the top and bottom to the where the highest and
lowest characters in the font would reach, even if you don't have those
characters in your text. This is useful if you will generate multiple
images of text (with multiple invocations of pbmtextps and concatenate
them vertically to create a multiline text image. -pad makes sure the
lines in this image are equally spaced.
Example:
$ pbmtextps 'cat' | pamfile
$ pbmtextps 'Catty' | pamfile
The commands above, with no -pad, show that the 'Catty' image is higher
because capital C reaches high and 'y' reaches low.
$ pbmtextps -pad 'cat' | pamfile
$ pbmtextps -pad 'Catty' | pamfile
The commands above, with -pad, show that both images are the same
height.
If you specify -pad with -ascent or -descent, the larger value is ef-
fective.
-crop makes the program crop all sides to the far edge of the type. It
is the same as -leftmargin=0 -rightmargin=0 -topmargin=0 -bottommar-
gin=0.
You cannot specify any other margin-affecting options with -crop.
The default top margin, when you specify neither -ascent, -topmargin,
nor -pad, is as if you specified topmargin=0.
The default bottom margin, when you specify neither -descent, -bottom-
margin, nor -pad, is as if you specified -descent=1.5*fontsize.
The default left margin, when you do not specify -leftmargin, is as if
you specified -leftmargin=0.5*fontsize.
The default right margin, when you do not specify -rightmargin, is as
if you specified -rightmargin=0.
OPTIONS
-font=fontname
This specifies the font to use. fontname is the name of any
valid postscript font which is installed on the system.
The default is TimesRoman.
Warning: if fontname does not name a valid font, pbmtextps just
uses the default font. It does not tell you it is doing this.
-fontsize=float
This is the size of the font in points. See the -resolution op-
tion for information on how to interpret this size.
The default is 24 points.
Before Netpbm 10.75 (June 2016), this has to be a whole number.
-resolution=n
This is the resolution in dots per inch of distance measurements
pertaining to generation of the image. PBM images don't have
any inherent resolution, so a distance such as "1 inch" doesn't
mean anything unless you separately specify what resolution
you're talking about. That's what this option does.
In particular, the meaning of the font size is determined by
this resolution. If the font size is 24 points and the resolu-
tion is 150 dpi, then the font size is 50 pixels.
The default is 150 dpi.
-leftmargin=n
-rightmargin=n
-topmargin=n
-bottommargin=n
These options control the margins added to the image, measured
from the far edge of the type. See Margins <#margins> for de-
tails.
All sizes are in points, as a floating point number.
These options were new in Netpbm 10.75 (June 2016).
-ascent=n
-descent=n
These options control the the margins added to the image, mea-
sured from the text baseline. See Margins <#margins> for de-
tails.
Sizes are in points, as a floating point number.
These options were new in Netpbm 10.75 (June 2016).
-pad This pads the image on the top and bottom to the where the high-
est and lowest characters in the font would reach, even if you
don't have those characters in your text. See Margins
<#margins> for details.
This option was new in Netpbm 10.75 (June 2016).
-crop This makes the program crop all sides to the far edge of the
type. It is the same as -leftmargin=0 -rightmargin=0 -topmar-
gin=0 -bottommargin=0. See Margins <#margins> for details.
This option was new in Netpbm 10.75 (June 2016).
-stroke=n
This is the width of line, in points, to use for stroke font.
There is no default stroke width because the characters are
solid by default.
-verbose
This option makes pbmtextps display extra information on Stan-
dard Error about its processing.
-dump-ps
This option makes pbmtextps write to Standard Output the Post-
script program it would use to create the image, rather than the
image itself. You can use this as input to a Postscript inter-
preter (such as Ghostscript or a a printer) or to understand the
program better.
This option was new in Netpbm 10.75 (June 2016).
USAGE
You can generate antialiased text by using a larger resolution than the
default and scaling the image down using pamscale.
See the manual for the similar pbmtext for more advice on usage.
HISTORY
pbmtextps was added to Netpbm in Release 10.0 (June 2002).
SEE ALSO
pbmtext(1), pamcut(1), pnmcrop(1), pamcomp(1), ppmchange(1), pnmro-
tate(1), pamscale(1), ppmlabel(1), pbm(5)
AUTHOR
Copyright (C) 2002 by James McCann
DOCUMENT SOURCE
This manual page was generated by the Netpbm tool 'makeman' from HTML
source. The master documentation is at
http://netpbm.sourceforge.net/doc/pbmtextps.html
netpbm documentation 15 June 2016 Pbmtextps User Manual(0)
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