EFL (software) library

EFL (software) library
Name	EFL
Title	EFL (software) library
Developer	Enlightenment (software)
Released	2000s
Programming language	C (programming language)
Operating system	Linux, FreeBSD, OpenBSD, NetBSD, Windows NT, macOS
Genre	Widget toolkit, graphics library
License	GNU Lesser General Public License, MIT License

EFL (software) library

The EFL (software) library is a collection of modular software librarys for building graphical user interfaces and high-performance graphics on Linux, FreeBSD, OpenBSD, NetBSD, Windows NT, and macOS. It provides a lightweight set of building blocks for compositing, rendering, input handling, and window management used by projects ranging from desktop environments to embedded systems. EFL emphasizes memory efficiency, animation, and integration with windowing systems and display servers like Wayland, X.Org and Mir.

Overview

EFL comprises multiple coordinated modules that together implement a toolkit and runtime used by projects such as Enlightenment (software), Tizen, Wayland compositors, and embedded products from vendors collaborating with organizations like Samsung Electronics and Intel Corporation. The libraries are designed to interoperate with display servers including Wayland, X.Org, and platform abstractions like DirectFB and Windows Subsystem for Linux. EFL offers an alternative to toolkits such as GTK, Qt (software), and FLTK for developers seeking compact, animation-friendly stacks used in environments from GNOME-like shells to custom kiosk systems.

Architecture and Components

EFL is organized into separate libraries for specific roles: a core object system, a canvas rendering API, a 2D vector and image engine, a scene graph, a layout engine, and utility libraries. Core components include: - A core object and type system used internally and externally, comparable to systems in GLib and Qt (software). - A canvas and scene graph that enable retained-mode rendering similar in concept to approaches used by Cairo (graphics) and Skia (graphics library), while offering low-level control akin to OpenGL and Vulkan. - Image handling and loaders supporting formats like PNG and JPEG, interoperable with libraries such as libpng and libjpeg. - A layout engine and widget set used for constructing user interfaces with features like theming and transitions resembling capabilities in CSS engines used by WebKit and Blink (browser engine). - Bindings and integration layers for compositors and input systems, analogous to integration work done for Wayland compositors and display managers like LightDM.

These components interoperate with graphics stacks such as Mesa (computer graphics), EGL, and OpenGL ES, and can be accelerated using drivers from vendors including NVIDIA, AMD, and Intel Corporation on hardware managed by DRM (kernel subsystem).

Development and Language Bindings

The EFL ecosystem provides official and community-maintained language bindings to allow development in languages beyond C (programming language). Bindings include Python (programming language), Perl, Lua (programming language), Javascript, and Rust (programming language) through projects that integrate with build tools like CMake and Meson. Development workflows often use version control systems such as Git (software), hosting and collaboration via platforms like GitHub and GitLab. Continuous integration and testing practices mirror those in large projects like Linux kernel and GNOME to maintain cross-platform portability and stability.

History and Versioning

EFL originated in the early 2000s alongside the development of Enlightenment (software) as part of efforts to build a lightweight compositing window manager. Over time, releases adopted semantic versioning and modular packaging to facilitate independent updates of subsystems, a strategy similar to projects like GLib and libreoffice. Major milestones include integration with Wayland during the 2010s, adoption by mobile and embedded platforms such as Tizen, and collaborations with hardware vendors like Samsung Electronics to optimize performance on ARM-based SoCs from ARM Holdings and Qualcomm. Release management has been influenced by practices used in Debian and Fedora distributions to ensure packaging and distribution across ecosystems.

Use Cases and Applications

EFL is used in desktop environments, embedded devices, digital signage, automotive infotainment, and consumer electronics. Notable usages include the Enlightenment (software) desktop shell, components within Tizen-based devices, and UI layers for custom appliances developed by companies such as Samsung Electronics and integrators working with ARM Holdings platforms. EFL’s design appeals to projects requiring low memory footprint and smooth animation, similar to why projects choose Qt (software) for embedded systems or SDL (software) for games.

Performance and Optimization

EFL emphasizes runtime efficiency and low memory usage, employing algorithms and data structures tuned similarly to optimizations seen in Mesa (computer graphics) and graphics middleware from NVIDIA and AMD. Its rendering pipeline leverages hardware acceleration via OpenGL ES, EGL, and driver stacks maintained by the Linux kernel community. Performance tuning often involves interaction with kernel subsystems like DRM (kernel subsystem) and windowing protocols such as Wayland, and benefits from profiling tools and frameworks used in projects like perf (Linux tool) and Valgrind.

Licensing and Community Contributions

EFL is distributed under permissive and LGPL-style licenses to facilitate use in proprietary and open-source projects, resembling licensing choices made by projects like GTK and Qt (software). Development is community-driven, with contributions from individual developers, companies such as Samsung Electronics and collaborators engaged through platforms like GitHub and GitLab, and coordination practices akin to those used by organizations such as The Linux Foundation and Freedesktop.org. Community resources and documentation are maintained by contributors aligned with standards and interoperability efforts championed by groups like freedesktop.org.

Category:Graphics libraries