1IM_INVERT(3)               Library Functions Manual               IM_INVERT(3)
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NAME

6       im_invert - inverts an image pointed by an image descriptor.
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SYNOPSIS

9       #include <vips/vips.h>
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11       int im_invert(in, out)
12       IMAGE *in, *out;
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DESCRIPTION

15       im_invert  inverts the image held by image descriptor in and writes the
16       result on the image descriptor out.  The  function  works  on  FMTUCHAR
17       images  only.  The result at point x of the input image is 255-x at the
18       output image.  Input can have any no of channels.
19         This is not a generally useful program -- it is included as an  exam‐
20       ple  of  a  very  simple  new-style  IO function. Feel the power of the
21       source, Luke!
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RETURN VALUE

24       The function returns 0 on success and -1 on error.
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SEE ALSO

27       im_add(3), im_lintra(3), im_multiply(3).
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AUTHOR

30       J. Cupitt - 21/7/93
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34                                 11 April 1990                    IM_INVERT(3)
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