LGPLv2+ and LGPLv2+ with exceptions and GPLv2+ and GPLv2+ with exceptions and BSD and Inner-Net-2.0 and ISC and Public Domain and GFDL-1.3-only
The core library that forms the basis for projects such as GTK+ and GNOME
GLib is a bundle of three (formerly five) low-level system libraries written in C and developed mainly by GNOME. GLib's code was separated from GTK, so it can be used by software other than GNOME and has been developed in parallel ever since.
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GStreamer streaming media framework base plugins
GStreamer is a graphics library for built-in media processing components. BasePlug-ins is a the collections used to maintain the GStreamer plugin.
Bindings for GStreamer 1.0, the open source multimedia framework
GStreamer1 implements a framework that allows for processing and encoding of multimedia sources in a manner similar to a shell pipeline. Because it's introspection-based, most of the classes follow directly from the C API. Therefore, most of the documentation is by example rather than a full breakdown of the class structure.
Zlib is a free, general-purpose, not covered by any patents, lossless data-compression library for use on virtually any computer hardware and operating system. The zlib data format is itself portable across platforms.
The GNU C Library project provides the core libraries for the GNU system and GNU/Linux systems, as well as many other systems that use Linux as the kernel. These libraries provide critical APIs including ISO C11, POSIX.1-2008, BSD, OS-specific APIs and more. These APIs include such foundational facilities as open, read, write, malloc, printf, getaddrinfo, dlopen, pthread_create, crypt, login, exit and more.
Cairo is a 2D graphics libarary with support for multiple output devices. It provides high-quality display and print output and this package also contains functionality to make cairo graphics library integrate well with GObject used by GNOME.
gdk is a multi-platform toolkit for creating graphical user interfaces.
gdk is written in C but has been designed from the ground up to support a wide range of languages. It provide a complete set of widgets,and suitable for projects ranging from small one-off tools to complete application suites.
HarfBuzz is a text-shaping engine. If you give HarfBuzz a font and a string containing a sequence of Unicode codepoints, HarfBuzz selects and positions the corresponding glyphs from the font, applying all of the necessary layout rules and font features. HarfBuzz then returns the string to you in the form that is correctly arranged for the language and writing system.
GTK+ is an object-oriented widget toolkit written in the programming language C; it has a C-based object-oriented architecture that allows for maximum flexibility. The GTK+ library contains a set of graphical control elements (widgets)for creating graphical user interfaces. This package contains version 3 of GTK+.
Cairo is a 2D graphics library designed to provide high-quality display and print output. This package contains functionality to make cairo graphics library integrate well with the GObject object system used by GNOME.
An integration library for using GStreamer with Clutter
Clutter-Gst is an integration library for using GStreamer with Clutter. It provides a GStreamer sink to upload frames to GL and an actor that implements the ClutterGstPlayer interface using playbin.
Cogl is a modern 3D graphics API with associated utility APIs
COGL is a low level OpenGL abstraction library developed for (and part of) Clutter. It is used primarily by Clutter to provide a common rendering API that works transparently across OpenGL >=1.4, OpenGL ES 1.1 and OpenGL ES 2.0.