For example, dialogs, popup menus, or combo boxes. This window is also chosen to be the root widget window into which all other top-level widgets are composited. For QWidget, the widgets' contents are rendered using the CPU into images, which are then uploaded into textures and composited by the plugin.ĮGLFS is the recommended plugin for modern Embedded Linux devices that include a GPU.ĮGLFS forces the first top-level window - either a QWidget or a QQuickView - to become fullscreen. In addition to Qt Quick 2 and native OpenGL applications, EGLFS supports software-rendered windows, like QWidget, too. EGL device integration - dynamically loaded pluginsĮGLFS is a platform plugin for running Qt5 applications on top of EGL and OpenGL ES 2.0, without an actual windowing system like X11 or Wayland.EGLFS hooks - a single source file compiled into the platform plugin.Typically, these adaptations are provided as: This is why we need the board or GPU-specific adaptation code. Creating a native window, which won't necessarily be an actual window on the screen, must still be done by platform-specific means. Qt can use EGL for context and surface management, however the API contains no platform-specifics. Platform Plugins for Embedded Linux Devices EGLFSĮGL is an interface between OpenGL and the native windowing system. For single-process use cases, the Qt Platform Abstraction is a superior solution multi-process use cases are supported through Wayland. Note: As of Qt 5.0, Qt no longer has its own window system (QWS) implementation. Alternatively, for quick tests, use the -platform command-line argument with the same syntax. If it's not suitable, use the QT_QPA_PLATFORM environment variable to request another plugin. However, the availability of these plugins depend on how Qt is configured.ĮGLFS is the default plugin on many boards.
On Embedded Linux systems, there are multiple platform plugins that you can use: EGLFS, LinuxFB, DirectFB, or Wayland.
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