im_invert3
Inverts an image pointed by an image descriptor.
Usage
#include <vips/vips.h>
int im_invert(in, out)
IMAGE *in, *out;
Overview
im_invert inverts the image held by image descriptor in and writes the result on the image descriptor out. The function works on FMTUCHAR images only. The result at point x of the input image is 255-x at the output image. Input can have any no of channels.
This is not a generally useful program -- it is included as an example of a very simple new-style IO function. Feel the power of the source, Luke!
Return value
The function returns 0 on success and -1 on error.
Releases
Unchanged in 4 releases since Debian 3.1 (Sarge).