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rawtoppm
!!!rawtoppm
NAME
SYNOPSIS
DESCRIPTION
OPTIONS
SEE ALSO
AUTHOR
----
!!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.
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Last edited on Monday, June 3, 2002 6:51:02 pm by "perry"

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