1Pnmpaste User Manual(0) Pnmpaste User Manual(0)
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6 pnmpaste - paste a rectangle into a PNM image
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10 pnmpaste
11 [-replace|-or|-and|-xor]
13 frompnmfile x y [intopnmfile]
15 You can abbreviate all options to their shortest unique prefix.
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20 This program is part of Netpbm(1).
21 pnmpaste reads two PNM images as input and inserts the first image (the
23 "pasted image") into the second (the "base image") at the specified
24 location, and produces a PNM image the same size and type as the base
25 image as output. If you don't specify the second file, pnmpaste reads
26 the base image from Standard Input.
27 x and y specify the location in the base image at which to put the top
29 left corner of the pasted image, x giving the horizontal position and x
30 giving the vertical position. A nonnegative value indicates the number
31 of pixels right of the right edge or below the top edge of the base
32 image, while a negative value indicates the number of pixels right of
33 the right edge or below the bottom edge (so x = -5 means 5 pixels left
34 of the right edge).
35 If any part of the pasted image does not fit within the base image,
37 pnmpaste fails.
38 This tool is most useful in combination with pamcut. For instance, if
40 you want to edit a small segment of a large image, and your image edi‐
41 tor cannot edit the large image, you can cut out the segment you are
42 interested in, edit it, and then paste it back in.
43 Another useful companion tool is pbmmask.
45 pamcomp is a more general tool, except that it lacks the 'or,' 'and,'
47 and 'xor' functions. pamcomp allows you to specify an alpha mask in
48 order to have only part of the inserted image get inserted. So the
49 inserted pixels need not be a rectangle. You can also have the
50 inserted image be translucent, so the resulting image is a mixture of
51 the inserted image and the base image.
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55 The option specifies the operation to use when doing the paste. The
56 default is -replace, which means to do the obvious paste: replace pix‐
57 els of the 'into' image with those of the 'from' image.
58 -and, -or, and -xor are allowed only if both input images are PBM
60 images. They say to combine the 'from' and 'into' images by performing
61 boolean operations: Each pixel of the output image is the result of
62 the boolean operation on the corresponding pixels of the two input
63 image, where white is TRUE and black is FALSE.
64 Note that this is different from what you would get by doing a bit
66 arithmetic on the bits in the PBM images, because in PBM, white is rep‐
67 resented by a 0 bit, and 0 in bit arithmetic corresponds to FALSE in
68 boolean arithmetic.
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72 pamcomp(1), pamcut(1), pnminvert(1), pnmarith(1), pbmmask(1), pnm(1)
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76 Copyright (C) 1989, 1991 by Jef Poskanzer.
77netpbm documentation 21 February 1991 Pnmpaste User Manual(0)