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# nip2 --- a user interface for libvips
[](https://build.snapcraft.io/user/jcupitt/nip2)
nip2 is a GUI for the [libvips image processing
library](https://libvips.github.io/libvips). It's a little like a spreadsheet:
you create a set of formula connecting your objects together, and on a change
nip2 recalculates.
[](screenshot.png)
## Installing
You can probably install nip2 via your package manager. For
Windows and OS X, you can download a binary from the [nip2 releases
page](https://github.com/libvips/nip2/releases). If you have to build from
source, see the section below.
## Documentation
nip2 comes with a 50-page manual --- press F1 or Help / Contents in the
program to view it.
## Building nip2 from source
In the nip2 directory you should just be able to do the usual:
```
./configure
make
sudo make install
```
By default this will install files to `/usr/local`. Check the summary at the
end of `configure` and make sure you have all of the features you want.
If you downloaded from GIT you'll need:
```
./autogen.sh
```
first to build the configure system.
nip2 needs vips, gtk2 and libxml2 at runtime and flex/bison at compile time.
If you have fftw3, gsl, goffice, libgvc you get extra features.
### snapcraft
Rebuild snap with:
```
snapcraft cleanbuild
```
Though it's done automatically on a push.
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