ppmtoxpm
convert a portable pixmap into an X11 pixmap
see also :
ppmcolormask - xpmtoppm
Synopsis
ppmtoxpm
[-name=xpmname]
[-rgb=rgb-textfile]
[-alphamask=pgmfile] [ppmfile]
Minimum unique
abbrevations are acceptable.
add an example, a script, a trick and tips
examples
source
ppmcolormask rgb:C0/C0/C0 "$PPM_NAME"
> "$MASK_NAME"
ppmtoxpm -name "$XPM_LABEL"
-alphamask="$MASK_NAME" "$PPM_NAME" |
perl -pe 's/ #(.)(.)(.)"/
#$1$1$2$2$3$3"/' > "$XPM_NAME"
source
ppmcolormask rgb:47/6c/6c ${ex_output}.ppm >
/tmp/et$$.pbm
ppmtoxpm -alphamask=/tmp/et$$.pbm ${ex_output}.ppm > ${ex_output}.xpm
ppmcolormask rgb:47/6c/6c ${ex_output}-fs.ppm >
/tmp/et$$.pbm
ppmcolormask rgb:47/6c/6c ${ex_output}-fs.ppm >
/tmp/et$$.pbm
ppmtoxpm -alphamask=/tmp/et$$.pbm ${ex_output}-fs.ppm \
> ${ex_output}-fs.xpm
rm -f /tmp/et$$.pbm
description
Reads a
portable pixmap as input. Produces X11 pixmap (version 3) as
output which can be loaded directly by the XPM library.
For example, to
convert the file "dot" (found in
/usr/include/X11/bitmaps), from xbm to xpm one could
specify
xbmtopbm dot |
ppmtoxpm -name dot
or, with a rgb
text file (in the local directory)
xbmtopbm dot |
ppmtoxpm -name dot -rgb rgb.txt
options
-name=xpmname
The -name option allows
you to specify the prefix string which is printed in the
resulting XPM output. If not specified, will default to the
filename (without extension) of the <ppmfile>
argument. If you do not specify -name or
ppmfile, (i.e. your input is from Standad Input), the
prefix string defaults to the string noname.
rgb=rgb-textfile
The -rgb option allows
you to specify an X11 rgb text file for the lookup of color
name mnemonics. This rgb text file is typically the
/usr/lib/X11/rgb.txt of the MIT X11 distribution, but any
file using the same format may be used. When specified and a
RGB value from the ppm input matches a RGB value from the
<rgb-textfile>, then the corresponding color name
mnemonic is printed in the XPM’s colormap. If you
don’t specify -rgb or if the RGB values
don’t match, then ppmtoxpm produces the color
specifications in the #RGB, #RRGGBB, #RRRGGGBBB, or
#RRRRGGGGBBBB hexadecimal format.
-alphamask=pgmfile
This option names a PGM file to
use as an alpha (transparency) mask. The file must contain
an image the same dimensions as the input image.
ppmtoxpm marks as transparent any pixel whose
position in the alpha mask image is at most half white.
If you
don’t specify -alphamask, ppmtoxpm makes
all pixels in the output opaque.
ppmcolormask
is one way to generate an alpha mask file. You might also
generate it by extracting transparency information from an
XPM file with the -alphaout option to
xpmtoppm. There are similar options on other Netpbm
converters that convert from formats that include
transparency information too.
limitations
An option to match the closest (rather than exact) color name
mnemonic from the rgb text would be a desirable enhancement.
Truncation of the least significant bits of a RGB value may
result in nonexact matches when performing color name mnemonic
lookups.
see also
ppmcolormask ,
xpmtoppm , ppm
XPM Manual by Arnaud Le Hors lehors[:at:]mirsa.inria[:dot:]fr
author
Copyright (C)
1990 by Mark W. Snitily.
Permission to
use, copy, modify, and distribute this software and its
documentation for any purpose and without fee is hereby
granted, provided that the above copyright notice appear in
all copies and that both that copyright notice and this
permission notice appear in supporting documentation. This
software is provided "as is" without express or
implied warranty.
This tool was
developed for Schlumberger Technologies, ATE Division, and
with their permission is being made available to the public
with the above copyright notice and permission notice.
Upgraded to
XPM2 by
Paul Breslaw, Mecasoft SA, Zurich, Switzerland
(paul[:at:]mecazh.uu[:dot:]ch)
Thu Nov 8 16:01:17 1990
Upgraded to XPM
version 3 by
Arnaud Le Hors (lehors[:at:]mirsa.inria[:dot:]fr)
Tue Apr 9 1991