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Pnmpaste User Manual(0) Pnmpaste User Manual(0)
NAME
pnmpaste - paste a rectangle into a PNM image
SYNOPSIS
pnmpaste
[-replace|-or|-and|-xor]
frompnmfile x y [intopnmfile]
You can abbreviate all options to their shortest unique prefix.
DESCRIPTION
This program is part of Netpbm(1).
pnmpaste reads two PNM images as input and inserts the first image (the
"pasted image") into the second (the "base image") at the specified lo-
cation, and produces a PNM image the same size and type as the base im-
age as output.
Either file name argument (but not both) may be '-' to indicate Stan-
dard Input. If you don't specify the second file argument at all,
that's the same as '-'.
x and y specify the location in the base image at which to put the top
left corner of the pasted image, x giving the horizontal position and x
giving the vertical position. A nonnegative value indicates the number
of pixels right of the right edge or below the top edge of the base im-
age, while a negative value indicates the number of pixels right of the
right edge or below the bottom edge (so x = -5 means 5 pixels left of
the right edge).
If any part of the pasted image does not fit within the base image, pn-
mpaste fails.
This tool is most useful in combination with pamcut. For instance, if
you want to edit a small segment of a large image, and your image edi-
tor cannot edit the large image, you can cut out the segment you are
interested in, edit it, and then paste it back in.
Another useful companion tool is pbmmask.
pamcomp is a more general tool, except that it lacks the "or," "and,"
and "xor" functions. pamcomp allows you to specify a transparency mask
in order to have only part of the inserted image get inserted. So the
inserted pixels need not be a rectangle. You can also have the in-
serted image be translucent, so the resulting image is a mixture of the
inserted image and the base image.
OPTIONS
The option specifies the operation to use when doing the paste. The
default is -replace, which means to do the obvious paste: replace pix-
els of the "into" image with those of the "from" image.
-and, -or, and -xor are allowed only if both input images are PBM im-
ages. They say to combine the "from" and "into" images by performing
boolean operations: Each pixel of the output image is the result of
the boolean operation on the corresponding pixels of the two input im-
age, where white is TRUE and black is FALSE.
Note that this is different from what you would get by doing a bit
arithmetic on the bits in the PBM images, because in PBM, white is rep-
resented by a 0 bit, and 0 in bit arithmetic corresponds to FALSE in
boolean arithmetic.
SEE ALSO
pamcomp(1), pamcut(1), pnminvert(1), pnmarith(1), pbmmask(1), pnm(5)
AUTHOR
Copyright (C) 1989, 1991 by Jef Poskanzer.
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/pnmpaste.html
netpbm documentation 05 July 2017 Pnmpaste User Manual(0)
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