libvips
libvips : an image processing library
libvips is a 2D image processing library. Compared tosimilar libraries, libvips runs quickly and uses littlememory.
libvips is licensed under the LGPL 2.1+.
It has around 300 operations covering arithmetic, histograms, convolutions, morphological operations, frequency filtering, colour, resampling, statistics and others. It supports a large range of numeric formats, from 8-bit int to 128-bit complex. It supports a good range of image formats, including JPEG, TIFF, PNG, WebP, FITS, Matlab, OpenEXR, DeepZoom, and OpenSlide. It can also load images via ImageMagick or GraphicsMagick.
It has APIs for C and C++ and comes with a Python binding and a command-line interface. Bindings are available for Ruby, JavaScript and others. There is full documentation. There are several GUIs as well, see the VIPS website.
There are packages for most unix-like operating systems and binaries for Windows and OS X.
Building libvips from source
In the libvips directory you should just be able to do:
$ ./configure
Check the summary at the end of configure
carefully. libvips must have build-essential
, pkg-config
, glib2.0-dev
, and libxml2-dev
.
For the vips8 Python binding, you must have gobject-introspection
, python-gi-dev
, and libgirepository1.0-dev
.
You’ll need the dev packages for the file format support you want. For basic jpeg and tiff support, you’ll need libtiff5-dev
, libjpeg-turbo8-dev
, and libgsf-1-dev
. See the Dependencies section below for a full list of the things that libvips can be configured to use.
Once configure
is looking OK, compile and install with the usual:
$ make
$ sudo make install
By default this will install files to /usr/local
.
We have detailed guides on the wiki for building on Windows and building on OS X.
Building libvips from git
Checkout the latest sources with:
$ git clone git://github.com/jcupitt/libvips.git
Building from git needs more packages, you’ll need at least swig
, gtk-doc
and gobject-introspection
, see the dependencies section below. For example:
$ brew install gtk-doc swig
Then build the build system with:
$ ./bootstrap.sh
Debug build:
$ CFLAGS="-g -Wall" CXXFLAGS="-g -Wall" \
./configure --prefix=/home/john/vips --enable-debug
$ make
$ make install
Leak check:
$ export G_DEBUG=gc-friendly
$ export G_SLICE=always-malloc
$ valgrind --suppressions=libvips.supp \
--leak-check=yes \
vips ... > vips-vg.log 2>&1
valgrind threading check:
$ valgrind --tool=helgrind vips ... > vips-vg.log 2>&1
Clang build:
$ CC=clang CXX=clang++ ./configure --prefix=/home/john/vips
Clang static analysis:
$ scan-build ./configure --disable-introspection
$ scan-build -o scan -v make
$ scan-view scan/2013-11-22-2
Clang dynamic analysis:
$ FLAGS="-O1 -g -fsanitize=address"
$ FLAGS="$FLAGS -fno-omit-frame-pointer -fno-optimize-sibling-calls"
$ CC=clang CXX=clang++ LD=clang \
CFLAGS="$FLAGS" CXXFLAGS="$FLAGS" LDFLAGS=-fsanitize=address \
./configure --prefix=/home/john/vips --disable-introspection
$ FLAGS="-O1 -g -fsanitize=thread"
$ FLAGS="$FLAGS -fPIC -pie"
$ FLAGS="$FLAGS -fno-omit-frame-pointer -fno-optimize-sibling-calls"
$ CC=clang CXX=clang++ LD=clang \
CFLAGS="$FLAGS" CXXFLAGS="$FLAGS" \
LDFLAGS="-fsanitize=thread -fPIC -pie" \
./configure --prefix=/home/john/vips --disable-introspection
Build with the GCC auto-vectorizer and diagnostics (or just -O3):
$ FLAGS="-O2 -msse4.2 -ffast-math"
$ FLAGS="$FLAGS -ftree-vectorize -fdump-tree-vect-details"
$ CFLAGS="$FLAGS" CXXFLAGS="$FLAGS" \
./configure --prefix=/home/john/vips --disable-introspection
Static analysis with:
$ cppcheck --force --enable=style . &> cppcheck.log
Dependencies
libvips has to have gettext
, glib2.0-dev
and libxml2-dev
. Other dependencies are optional, see below.
Optional dependencies
If suitable versions are found, libvips will add support for the following libraries automatically. See ./configure --help
for a set of flags to control library detection. Packages are generally found with pkg-config
, so make sure that is working.
libtiff and libjpeg do not usually use pkg-config
so libvips looks for them in the default path and in $prefix
. If you have installed your own versions of these libraries in a different location, libvips will not see them. Use switches to libvips configure like:
./configure --prefix=/Users/john/vips \
--with-tiff-includes=/opt/local/include \
--with-tiff-libraries=/opt/local/lib \
--with-jpeg-includes=/opt/local/include \
--with-jpeg-libraries=/opt/local/lib
or perhaps:
CFLAGS="-g -Wall -I/opt/local/include -L/opt/local/lib" \
CXXFLAGS="-g -Wall -I/opt/local/include -L/opt/local/lib" \
./configure --without-python --prefix=/Users/john/vips
to get libvips to see your builds.
vips8 Python binding
If gobject-introspection
, python-gi-dev
, and libgirepository1.0-dev
are available, libvips will install the vips8 Python binding.
libjpeg
The IJG JPEG library. Use the -turbo
version if you can.
libexif
If available, libvips adds support for EXIF metadata in JPEG files.
libgsf-1
If available, libvips adds support for creating image pyramids with dzsave
.
libtiff
The TIFF library. It needs to be built with support for JPEG and ZIP compression. 3.4b037 and later are known to be OK.
fftw3
If libvips finds this library, it uses it for fourier transforms.
lcms2, lcms
If present, vips_icc_import()
, vips_icc_export()
and vips_icc_transform()
are available for transforming images with ICC profiles. If lcms2
is available it is used in preference to lcms
, since it is faster.
Large files
libvips uses the standard autoconf tests to work out how to support large files (>2GB) on your system. Any reasonably recent unix should be OK.
libpng
If present, libvips can load and save png files.
ImageMagick, or optionally GraphicsMagick
If available, libvips adds support for loading all libMagick-supported image file types. Use --with-magickpackage=GraphicsMagick
to build against graphicsmagick instead.
pangoft2
If available, libvips adds support for text rendering. You need the package pangoft2 in pkg-config --list-all
.
orc-0.4
If available, vips will accelerate some operations with this run-time
compiler.
matio
If available, vips can load images from Matlab save files.
cfitsio
If available, vips can load FITS images.
libwebp
If available, vips can load and save WebP images.
OpenEXR
If available, libvips will directly read (but not write, sadly)
OpenEXR images.
OpenSlide
If available, libvips can load OpenSlide-supported virtual slide files: Aperio, Hamamatsu, Leica, MIRAX, Sakura, Trestle, and Ventana.
swig, python, python-dev
If available, we build the vips7 python binding.
Disclaimer
No guarantees of performance accompany this software, nor is any responsibility assumed on the part of the authors. Please read the licence agreement.
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