296 lines
8.8 KiB
Markdown
296 lines
8.8 KiB
Markdown
# libvips : an image processing library
|
|
|
|
[](https://travis-ci.org/jcupitt/libvips)
|
|
[](https://scan.coverity.com/projects/jcupitt-libvips)
|
|
|
|
libvips is a 2D image processing library. Compared to
|
|
similar libraries, [libvips runs quickly and uses little
|
|
memory](https://github.com/jcupitt/libvips/wiki/Speed-and-memory-use).
|
|
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,
|
|
PDF, SVG, HDR, PPM, CSV, GIF, Analyze, DeepZoom, and OpenSlide. It can
|
|
also load images via ImageMagick or GraphicsMagick.
|
|
|
|
It has APIs for
|
|
[C](http://jcupitt.github.io/libvips/API/current/using-from-c.html)
|
|
and
|
|
[C++](http://jcupitt.github.io/libvips/API/current/using-from-cpp.html)
|
|
and a [command-line
|
|
interface](http://jcupitt.github.io/libvips/API/current/using-cli.html).
|
|
Bindings are available for
|
|
[Python](https://pypi.python.org/pypi/pyvips),
|
|
[Ruby](https://rubygems.org/gems/ruby-vips),
|
|
[PHP](https://github.com/jcupitt/php-vips),
|
|
[Go](https://github.com/davidbyttow/govips),
|
|
[Lua](https://github.com/jcupitt/lua-vips),
|
|
JavaScript and others. There is full
|
|
[documentation](http://jcupitt.github.io/libvips/API/current).
|
|
There are several GUIs as well, see the [VIPS
|
|
website](http://jcupitt.github.io/libvips).
|
|
|
|
There are packages for most unix-like operating systems and binaries for
|
|
Windows and OS X.
|
|
|
|
# Building libvips from a source tarball
|
|
|
|
We keep pre-baked tarballs of releases on the vips website:
|
|
|
|
https://github.com/jcupitt/libvips/releases
|
|
|
|
Untar, then 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`,
|
|
`libexpat1-dev`.
|
|
|
|
For the vips8 Python binding, you must also 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](https://github.com/jcupitt/libvips/wiki/Build-for-Windows)
|
|
and [building on OS
|
|
X](https://github.com/jcupitt/libvips/wiki/Build-for-macOS).
|
|
|
|
# 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:
|
|
|
|
$ ./autogen.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
|
|
$ valgrind --suppressions=libvips.supp \
|
|
--leak-check=yes \
|
|
vips ... > vips-vg.log 2>&1
|
|
|
|
Memory error debug:
|
|
|
|
$ valgrind --vgdb=yes --vgdb-error=0 vips ...
|
|
|
|
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 --disable-debug
|
|
$ 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
|
|
|
|
$ FLAGS="-O1 -g -fsanitize=thread"
|
|
$ FLAGS="$FLAGS -fPIC"
|
|
$ FLAGS="$FLAGS -fno-omit-frame-pointer -fno-optimize-sibling-calls"
|
|
$ CC=clang CXX=clang++ LD=clang \
|
|
CFLAGS="$FLAGS" CXXFLAGS="$FLAGS" \
|
|
LDFLAGS="-fsanitize=thread -fPIC" \
|
|
./configure --prefix=/home/john/vips \
|
|
--without-magick \
|
|
--disable-introspection
|
|
$ G_DEBUG=gc-friendly vips copy ~/pics/k2.jpg x.jpg >& log
|
|
|
|
Build with the GCC auto-vectorizer and diagnostics (or just -O3):
|
|
|
|
$ FLAGS="-O2 -march=native -ffast-math"
|
|
$ FLAGS="$FLAGS -ftree-vectorize -fdump-tree-vect-details"
|
|
$ CFLAGS="$FLAGS" CXXFLAGS="$FLAGS" \
|
|
./configure --prefix=/home/john/vips
|
|
|
|
Static analysis with:
|
|
|
|
$ cppcheck --force --enable=style . &> cppcheck.log
|
|
|
|
# Dependencies
|
|
|
|
libvips has to have `glib2.0-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, giflib 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-giflib-includes=/opt/local/include \
|
|
--with-giflib-libraries=/opt/local/lib \
|
|
--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.
|
|
|
|
### giflib
|
|
|
|
The standard gif loader. If this is not present, vips will try to load gifs
|
|
via imagemagick instead.
|
|
|
|
### librsvg
|
|
|
|
The usual SVG loader. If this is not present, vips will try to load SVGs
|
|
via imagemagick instead.
|
|
|
|
### libpoppler
|
|
|
|
The usual PDF loader. If this is not present, vips will try to load PDFs
|
|
via imagemagick instead.
|
|
|
|
### 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.
|
|
|
|
Imagemagick 6.9+ needs to have been built with `--with-modules`. Most packaged
|
|
IMs are, I think, but if you are rolling your own, you'll need to pass
|
|
this flag to configure.
|
|
|
|
If you are going to be using libvips with untrusted images, perhaps in a
|
|
web-server, for example, you should consider the security implications of
|
|
using a package with such a large attack surface. You might prefer not to
|
|
enable Magick support.
|
|
|
|
### 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.
|
|
|