NAME¶
ppmlabel - add text to a portable pixmap
SYNOPSIS¶
ppmlabel [
-angle angle]
[
-background transparent |
colour] [
-colour
colour] [
-file filename] [
-size textsize]
[
-text 'text string'] [
-x column]
[
-y row]
... [
ppmfile]
DESCRIPTION¶
ppmlabel uses the text drawing facilities of
ppmdraw to add text
to a portable pixmap. The location, size, baseline angle, colour of the text
and background colour (if any) are controlled by command line arguments. The
text can be specified on the command line or read from files. Any number of
separate text strings can be added by one invocation of
ppmlabel,
limited only by the maximum length of the command line.
If no
ppmfile is specified,
ppmdraw reads its input pixmap from
standard input.
OPTIONS¶
The arguments on the
ppmlabel command line are not options in the strict
sense; they are commands which control the placement and appearance of the
text being added to the input pixmap. They are executed left to right, and any
number of arguments may appear.
All flags can be abbreviated to their shortest unique prefix.
- -angle angle
- Sets the angle of the baseline of subsequent text.
angle is specified as an integral number of degrees, measured
counterclockwise from the row axis of the pixmap.
- -background transparent | colour
- If the argument is ``transparent'', text is
drawn over the existing pixels in the pixmap. If a colour is given
(see the -colour switch below for information on how to specify
colours), rectangles enclosing subsequent text are filled with that
colour.
- -colour colour
- Sets the colour for subsequent text. The colour can
be specified in five ways:
- •
- A name, assuming that a pointer to an X11-style colour
names file was compiled in.
- •
- An X11-style hexadecimal specifier: rgb:r/g/b, where r g
and b are each 1- to 4-digit hexadecimal numbers.
- •
- An X11-style decimal specifier: rgbi:r/g/b, where r g and b
are floating point numbers between 0 and 1.
- •
- For backwards compatibility, an old-X11-style hexadecimal
number: #rgb, #rrggbb, #rrrgggbbb, or #rrrrggggbbbb.
- •
- For backwards compatibility, a triplet of numbers separated
by commas: r,g,b, where r g and b are floating point numbers between 0 and
1. (This style was added before MIT came up with the similar rgbi
style.)
- -file filename
- Reads text from the file filename and draws it on
successive lines.
- -size textsize
- Sets the height of the tallest characters above the
baseline to textsize pixels.
- -text 'text string'
- Draws the given text string (which must be quoted if it
contains spaces). The location for subsequent text is advanced by 1.75
times the current textsize, which allows drawing multiple lines of
text in a reasonable manner without specifying the position of each
line.
- -x column
- Sets the column at which subsequent text will be left
justified. Depending on the shape of the first character, the actual text
may begin a few pixels to the right of this point.
- -y row
- Sets the row which will form the baseline of subsequent
text. Characters with descenders, such as ``y'', will extend below this
line.
BUGS¶
Text strings are restricted to 7 bit ASCII. The text font used by
ppmdraw
doesn't include definitions for 8 bit ISO 8859/1 characters.
When drawing multiple lines of text with a non-transparent background, it should
probably fill the space between the lines with the background colour. This is
tricky to get right when the text is rotated to a non-orthogonal angle.
The -size, -x, and -y options MUST precede the -text option specifying the
string they apply to, or they will be silently ignored in favor of the
defaults.
SEE ALSO¶
ppmmake(1),
ppm(5)
AUTHOR¶
Copyright (C) 1995 by John Walker (kelvin@fourmilab.ch) WWW home page:
http://www.fourmilab.ch/
Permission to use, copy, modify, and distribute this software and its
documentation for any purpose and without fee is hereby granted, without any
conditions or restrictions. This software is provided ``as is'' without
express or implied warranty.