NAME¶
rawtoppm - convert raw RGB bytes into a portable pixmap
SYNOPSIS¶
rawtoppm [
-headerskip N] [
-rowskip N]
[
-rgb|
-rbg|
-grb |
-gbr|
-brg|
-bgr ]
[
-interpixel|
-interrow]
width height [
imagedata]
DESCRIPTION¶
Reads raw RGB bytes as input. Produces a portable pixmap as output. The input
file is just RGB bytes. You have to specify the width and height on the
command line, since the program obviously can't get them from the file. The
maxval is assumed to be 255. If the resulting image is upside down, run it
through
pnmflip -tb .
OPTIONS¶
- -headerskip
- If the file has a header, you can use this flag to skip
over it.
- -rowskip
- If there is padding at the ends of the rows, you can skip
it with this flag.
- -rgb -rbg -grb -gbr -brg -bgr
- These flags let you specify alternate color orders. The
default is -rgb.
- -interpixel -interrow
- These flags let you specify how the colors are interleaved.
The default is -interpixel, meaning interleaved by pixel. A byte of
red, a byte of green, and a byte of blue, or whatever color order you
specified. -interrow means interleaved by row - a row of red, a row
of green, a row of blue, assuming standard rgb color order. An
-interplane flag - all the red pixels, then all the green, then all
the blue - would be an obvious extension, but is not implemented. You
could get the same effect by splitting the file into three parts (perhaps
using dd), turning each part into a PGM file with rawtopgm, and
then combining them with rgb3toppm.
SEE ALSO¶
ppm(5),
rawtopgm(1),
rgb3toppm(1),
pnmflip(1)
AUTHOR¶
Copyright (C) 1991 by Jef Poskanzer.