weston

History

Pekka Paalanen 6ffbba3ac1 Use weston_compositor_add_destroy_listener_once() in plugins This introduces a new convention of checking through the compositor destroy listener if the plugin is already initialized. If the plugin is already initialized, then the plugin entry function succeeds as a no-op. This makes it safe to load the same plugin multiple times in a running compositor. Currently module loading functions return failure if a plugin is already loaded, but that will change in the future. Therefore we need this other method of ensuring we do not double-initialize a plugin which would lead to list corruptions the very least. All plugins are converted to use the new helper, except: - those that do not have a destroy listener already, and - hmi-controller which does the same open-coded as the common code pattern did not fit there. Plugins should always have a compositor destroy listener registered since they very least allocate a struct to hold their data. Hence omissions are highlighted in code. Backends do not need this because weston_compositor_load_backend() already protects against double-init. GL-renderer does not export a standard module init function so cannot be initialized the usual way and therefore is not vulnerable to double-init. Signed-off-by: Pekka Paalanen <pekka.paalanen@collabora.com>		5 years ago
..
README	ivi-shell: Add missing sentence point	6 years ago
hmi-controller.c	Use weston_compositor_add_destroy_listener_once() in plugins	5 years ago
ivi-layout-export.h	Rename plugin-registry.h to libweston/plugin-registry.h	6 years ago
ivi-layout-private.h	ivi-layout: use libweston-desktop api is to send configure events everywhere	5 years ago
ivi-layout-shell.h	ivi-layout: introduced surface create and configure	6 years ago
ivi-layout-transition.c	ivi-layout: use libweston-desktop api is to send configure events everywhere	5 years ago
ivi-layout.c	ivi-layout: unmap desktop surfaces in ivi_view_destroy()	5 years ago
ivi-shell.c	Use weston_compositor_add_destroy_listener_once() in plugins	5 years ago
ivi-shell.h	Move libweston-desktop.h	6 years ago
meson.build	Link Weston plugins to libexec-weston.so	5 years ago
weston.ini.in	ivi-shell: remove input-method section from config	6 years ago

README

In-vehicle infotainment (information and entertainment)
graphical environment support modules for Weston

IVI-shell is an alternative shell for Weston, a Wayland display server.
Window management and application interaction with the display server
are very different to that of a normal desktop, which is why this is
a separate shell and not an extension to the desktop-shell suite with
xdg_shell. As such, applications need to be specifically written to use
IVI-shell.

IVI-shell contains two main features:
- Common layout library for surface, which allow ivi-shell developer
to develop own shell, linking Common layout library.
For the time being, the library refers Genivi ilm interface.

https://at.projects.genivi.org/wiki/display/WIE/Wayland+IVI+Extension+Home

- Extension protocol; ivi-application to tie wl_surface and a given ID.
With this ID, shell can identify which wl_surface is drawn by which
application. In in-vehicle infortainment system, a shell has to update
a property of a wl_surface. E.g. there may be a use case when vehicle
starts to move, the wl_surface drawn by Car navigation is expected to
move top of surfaces.

The actual software components delivered with Weston are:

- ivi-application.xml:
Wayland protocol extension for IVI-applications; the public
shell protocol (the same concept as xdg_shell).
Implemented by ivi-shell.so.

- ivi-shell.so:
A Weston shell module that implements ivi-application.xml interfaces.
Loads ivi-layout.so.

- ivi-layout.so:
Implements the IVI window management concepts: Screen, Layer,
Surface, groups of Layers, groups of Surfaces, see:
https://at.projects.genivi.org/wiki/display/WIE/Summary+of+Layer+manager+APIs
Offers a stable API for writing IVI-controller modules like
hmi-controller.so against the IVI concepts. In other words,
it offers an API to write IVI window manager modules.

- hmi-controller.so:
A sample implementation of an IVI-controller module, usually
replaced by IVI system vendors.
Uses ivi-layout.so to perform essentially window manager tasks.
This implementation keeps all window management inside the module,
while IVI-systems may use another module that exposes all window
management via Wayland or other protocol for an external process
to control.

- ivi-hmi-controller.xml:
Wayland protocol extension for IVI display control; the private
shell protocol for weston-ivi-shell-user-interface client
(the same concept as desktop-shell.xml).
Implemented by hmi-controller.so, and usually replaced by IVI
system vendors.

- weston-ivi-shell-user-interface:
A sample implementation of an IVI shell helper client, usually
replaced by IVI system vendors.
A helper client for basic display content, similar to
weston-desktop-shell.

How to compile:
same as weston. To disable, use option: --disable-ivi-shell for configure.

How to configure weston.ini:
reference ini file will be generated in <build_dir>/ivi-shell.

How to run:
same as weston. exec weston.

How to use UI:
http://lists.freedesktop.org/archives/wayland-devel/attachments/20140625/abbfc064/attachment-0001.png