66 lines
3.6 KiB
Markdown
66 lines
3.6 KiB
Markdown
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Title: Overview
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GTK is a library for creating graphical user interfaces. It works on many
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UNIX-like platforms, Windows, and macOS. GTK is released under the terms of
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the [GNU Library General Public License][gnu-lgpl], which allows for flexible
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licensing of client applications. GTK has a C-based, object-oriented
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architecture that allows for maximum flexibility and portability; there are
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bindings for many other languages, including C++, Objective-C, Guile/Scheme, Perl,
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Python, JavaScript, Rust, Go, TOM, Ada95, Free Pascal, and Eiffel.
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The GTK toolkit contains "widgets": GUI components such as buttons, text
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input, or windows.
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GTK depends on the following libraries:
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- **GLib**: a general-purpose utility library, not specific to graphical
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user interfaces. GLib provides many useful data types, macros, type
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conversions, string utilities, file utilities, a main loop abstraction,
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and so on. More information available on the [GLib website][glib].
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- **GObject**: A library that provides a type system, a collection of
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fundamental types including an object type, and a signal system. More
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information available on the [GObject website][gobject].
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- **GIO**: A modern, easy-to-use VFS API including abstractions for files,
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drives, volumes, stream IO, as well as network programming and IPC though
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DBus. More information available on the [GIO website][gio].
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- **Cairo**: Cairo is a 2D graphics library with support for multiple
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output devices. More information available on the [Cairo website][cairo].
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- **OpenGL**: OpenGL is the premier environment for developing portable,
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interactive 2D and 3D graphics applications. More information available
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on the [Khronos website][opengl].
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- **Pango**: Pango is a library for internationalized text handling. It
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centers around the `PangoLayout` object, representing a paragraph of
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text. Pango provides the engine for `GtkTextView`, `GtkLabel`,
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`GtkEntry`, and all GTK widgets that display text. More information
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available on the [Pango website][pango].
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- **gdk-pixbuf**: A small, portable library which allows you to create
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`GdkPixbuf` ("pixel buffer") objects from image data or image files. You
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can use `GdkPixbuf` in combination with widgets like `GtkImage` to
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display images. More information available on the
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[gdk-pixbuf website][gdkpixbuf].
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- **graphene**: A small library which provides vector and matrix
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datatypes and operations. Graphene provides optimized implementations
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using various SIMD instruction sets such as SSE and ARM NEON. More
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information available on the [Graphene website][graphene]
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GTK is divided into three parts:
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- **GDK**: GDK is the abstraction layer that allows GTK to support multiple
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windowing systems. GDK provides window system facilities on Wayland, X11,
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Microsoft Windows, and Apple macOS.
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- **GSK**: GSK is an API for creating a scene graph from drawing operation,
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called "nodes", and rendering it using different backends. GSK provides
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renderers for OpenGL, Vulkan and Cairo.
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- **GTK**: The GUI toolkit, containing UI elements, layout managers, data
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storage types for efficient use in GUI applications, and much more.
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[gnu-lgpl]: https://www.gnu.org/licenses/old-licenses/lgpl-2.1.en.html
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[glib]: https://developer.gnome.org/glib/stable/
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[gobject]: https://developer.gnome.org/gobject/stable/
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[gio]: https://developer.gnome.org/gio/stable/
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[cairo]: https://www.cairographics.org/manual/
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[opengl]: https://www.opengl.org/about/
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[pango]: https://pango.gnome.org/
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[gdkpixbuf]: https://developer.gnome.org/gdk-pixbuf/stable/
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[graphene]: https://ebassi.github.io/graphene/
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