# Dependencies

Most of these dependencies should be installed automatically when you install official packages.
Unless otherwise stated, the dependencies are all optional.

The tools required for building all of these projects are not listed here.
Typically, you will need: `gcc` or `clang`, `gnu-make`, `libiconv`, `gettext`, `cmake`, `autoconf`, `automake`, `pkg-config` or `pkgconf`, `bison`, `flex`, `intltool`, etc For building xpra itself and some of the python modules, you will also need Cython

Core Dependencies

Those are required by almost every component.

| Project | Source Download Link | Purpose | Client or Server | Notes | |--------------------------------------------------|------------------------------------------------------------------------------------------------|----------------------------------------------------------------|------------------|:---------------| | glib | https://ftp.gnome.org/pub/gnome/sources/glib/ | low-level library | both | Required | | gtk | http://ftp.gnome.org/pub/gnome/sources/gtk+/ | UI Toolkit | both | Required (*) | | PyGObject | https://pypi.org/project/PyGObject/#files | Bindings for GObject based libraries such as GTK and GStreamer | both | Required (*) |

(*) needed for running any kind of server, or GUI clients. It is not required for running text-only clients like `xpra top` or `xpra info`.

And some of their transitive dependencies:

| Project | Source Download Link | Purpose | |--------------------------------------------------------------------------------|-----------------------------------------------------------------|--------------------------------------| | gobject-introspection | https://gitlab.gnome.org/GNOME/gobject-introspection/-/releases | Provides bindings for Gtk, GLib, etc | | librsvg | https://gitlab.gnome.org/GNOME/librsvg/-/releases | `svg` parsing | | freetype | https://freetype.org/download.html | font parsing | | harfbuzzz | https://github.com/harfbuzz/harfbuzz/releases | text shaping engine | | icu | https://github.com/unicode-org/icu/releases | unicode library | | pixman | https://www.cairographics.org/releases/ | pixel manipulation | | fribidi | https://github.com/fribidi/fribidi/releases | unicode bidirectional library | | pango | https://download.gnome.org/sources/pango/ | text layout and rendering | | gdk-pixbuf | https://gitlab.gnome.org/GNOME/gdk-pixbuf/-/releases | image library | | libepoxy | https://github.com/anholt/libepoxy/releases | OpenGL function pointer management | | graphene | https://github.com/ebassi/graphene/releases | types for graphic libraries | | libtiff | https://download.osgeo.org/libtiff/ | Tag Image File Format | | zlib | https://www.zlib.net/ | Compression Library |

Some of the transitive dependencies are listed separately below as they are direct dependencies of xpra itself. ie: `lz4`, `libpng`, etc..

Network Layer

See Network

| Project | Source Download Link | Purpose | Client or Server | Notes | |--------------------------------------------------------------------|---------------------------------------------------------|----------------------------------------------------------------|---------------------|:-----------------------------------------------------| | lz4 | https://github.com/lz4/lz4/releases | packet compression | both | Strongly recommended | | aioquic | https://pypi.org/project/aioquic/ | low level network protocol | both | quic | | python-cryptography | https://pypi.python.org/pypi/cryptography | Encryption | both | | | python-zeroconf | https://pypi.org/project/zeroconf/ | Multicast DNS session publishing and browsing | both | | | python-netifaces | https://pypi.python.org/pypi/netifaces | Multicast DNS session publishing | server | | | dbus-python | https://dbus.freedesktop.org/releases/dbus-python/ | desktop integration, server control interface | both | not applicable to MS Windows or Mac OSX | | openssl | https://www.openssl.org/source/ | SSL | both | | | paramiko | https://pypi.org/project/paramiko/ | ssh integration | both | | | sshpass | https://sourceforge.net/projects/sshpass/files/sshpass/ | non-interactive SSH password authentication | usually client | | | brotli | https://github.com/google/brotli/releases | HTML client compression | r15540 | | PySocks | https://github.com/Anorov/PySocks/releases | client | SOCKS proxy support | https://github.com/Xpra-org/xpra/issues/2105 |

Authentication

See authentication modules

| Project | Source Download Link | Purpose | Client or Server | Notes | |------------------------------------------------------------|---------------------------------------|----------|------------------|:------------------------------------------------------| | python-gssapi | https://pypi.org/project/gssapi/ | GSSAPI | server | #1691 | | python-kerberos | https://pypi.org/project/kerberos/ | Kerberos | server | #1691 | | python-ldap | https://pypi.org/project/python-ldap/ | LDAP | server | #1691 | | python-ldap3 | https://pypi.org/project/ldap3/ | LDAP v3 | server | #1691 | | pyu2f | https://pypi.org/project/pyu2f/ | U2F | server | #1789 |

Python modules

| Project | Source Download Link | Notes | |-----------------------------------------------------------|---------------------------------------------------------------------------------------------------------------|:-----------------------------------------------------| | Cython | https://pypi.org/project/Cython/#files | build time: C extensions for Python | | python-ipaddress | https://pypi.org/project/ipaddress/#files | unspecified: r11859 | | python-idna | https://pypi.org/project/idna/#files | unspecified: r11860 | | python-decorator | https://pypi.org/project/decorator/#files | required by gssapi: r18781 | | pyasn1 | https://pypi.org/project/pyasn1/#files | unspecified: r5829 | | asn1crypto | https://pypi.org/project/asn1crypto/#files | required by python-cryptography: r17856 | | python-packaging | https://pypi.org/project/packaging/#files | required by python-cryptography: r15310 | | pyparsing | https://pypi.org/project/pyparsing/#files | required by python-cryptography: r15310 | | cffi | https://pypi.org/project/cffi/#files | required by python-cryptography: r11633 | | six | https://pypi.org/project/six/#files | required by python-cryptography: r11640 | | setuptools | https://pypi.org/project/setuptools/#files | unspecified: r5829 | | pycparser | https://pypi.org/project/pycparser/#files | required by cffi: r11634 | | pynacl | https://pypi.org/project/PyNaCl/#files | crypto library used by paramiko: r19967 | | bcrypt | https://pypi.org/project/bcrypt/#files | crypto library used by paramiko: r19965 | | pyopengl | https://pypi.python.org/pypi/PyOpenGL#files and
https://pypi.python.org/pypi/PyOpenGL-accelerate#files | client OpenGL accelerated rendering | | pycups | https://pypi.org/project/pycups/#files | Printing |

Encodings

See picture encodings

| Project | Source Download Link | Purpose | Client or Server | |------------------------------------------------------------------------------------|-----------------------------------------------------------------------------------------------------|-----------------------------------------------------------------------|------------------| | x264 | ftp://ftp.videolan.org/pub/x264/snapshots/ | h264 encoding | server | | openh264 | https://github.com/cisco/openh264/releases | h264 encoding and decoding | both | | vpx | http://downloads.webmproject.org/releases/webm/index.html | vp8 and vp9 codecs | both | | webp | http://downloads.webmproject.org/releases/webp/index.html | webp codec | both | | libpng | ftp://ftp.simplesystems.org/pub/libpng/png/src/libpng16/ | png encoding | both | | libspng | https://libspng.org/download/ | faster png encoding | both | | libjpeg-turbo | https://sourceforge.net/projects/libjpeg-turbo/files/ | jpeg encoding | both | | python-pillow | https://pypi.python.org/pypi/Pillow | png,jpeg,webp encoding and decoding, format conversion - Required | both | | libavif | https://github.com/AOMediaCodec/libavif/releases | avif encoding and decoding | both | | libyuv | https://chromium.googlesource.com/libyuv/libyuv/ | Colourspace Conversion | both | | pycuda | https://pypi.python.org/pypi/pycuda | NVENC | server | | cuda | https://developer.nvidia.com/cuda-toolkit | NVENC | server | | pyNVML | https://pypi.python.org/pypi/nvidia-ml-py/ | NVENC | server |

Audio

See audio forwarding

| Project | Source Download Link | Purpose | |------------------------------------------------|--------------------------------------------------------|----------------------| | gstreamer | http://gstreamer.freedesktop.org/src/ | audio framework | | Ogg | http://downloads.xiph.org/releases/ogg/ | ogg container format | | opus | http://downloads.xiph.org/releases/opus/ | opus codec | | Flac | http://downloads.xiph.org/releases/flac/ | flac codec | | Vorbis | http://downloads.xiph.org/releases/vorbis/ | vorbis codec | | wavpack | http://www.wavpack.com/downloads.html | wavpack codec | | faac | https://github.com/knik0/faac/releases | aac encoder | | faad | https://github.com/knik0/faad2/releases | aac decoder | | lame | http://sourceforge.net/projects/lame/files/lame/ | MP3 encoder | | TwoLame | http://sourceforge.net/projects/twolame/files/twolame/ | MP3 encoder |

Dependency Graphs

These graphs were generated using `jhbuild dot` on MacOS. The MacOS builds include very low level build dependencies.

### Codecs

### Python3 Modules

### GTK3

### Tools

### MacOS Packaging Tools