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Pnmpaste User Manual(0) 						  Pnmpaste User Manual(0)

       pnmpaste - paste a rectangle into a PNM image



       frompnmfile x y [intopnmfile]

       You can abbreviate all options to their shortest unique prefix.

       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 location, and produces a PNM image the
       same  size  and	type  as the base image as output.  If you don't specify the second file,
       pnmpaste reads the base image from Standard Input.

       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 non-
       negative value indicates the number of pixels right of the right edge  or  below  the  top
       edge of the base image, 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, pnmpaste 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 editor 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 an alpha 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  inserted  image  be  translucent, so the resulting image is a mixture of the inserted
       image and the base image.

       The option specifies the operation to use when doing the paste.	The default is	-replace,
       which  means to do the obvious paste: replace pixels of the 'into' image with those of the
       'from' image.

       -and, -or, and -xor are allowed only if both input images are PBM  images.   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 image, 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 represented by a 0 bit, and 0  in  bit  arith-
       metic corresponds to FALSE in boolean arithmetic.

       pamcomp(1) , pamcut(1) , pnminvert(1) , pnmarith(1) , pbmmask(1) , pnm(1)

       Copyright (C) 1989, 1991 by Jef Poskanzer.

netpbm documentation			 21 February 1991		  Pnmpaste User Manual(0)
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