mirror of
https://github.com/brl/mutter.git
synced 2024-11-22 08:00:42 -05:00
8fb30e6ec5
Spell out some conventions used in the README. https://gitlab.gnome.org/GNOME/mutter/-/merge_requests/1521
89 lines
3.4 KiB
Markdown
89 lines
3.4 KiB
Markdown
# Mutter
|
|
|
|
Mutter is a Wayland display server and X11 window manager and compositor library.
|
|
|
|
When used as a Wayland display server, it runs on top of KMS and libinput. It
|
|
implements the compositor side of the Wayland core protocol as well as various
|
|
protocol extensions. It also has functionality related to running X11
|
|
applications using Xwayland.
|
|
|
|
When used on top of Xorg it acts as a X11 window manager and compositing manager.
|
|
|
|
It contains functionality related to, among other things, window management,
|
|
window compositing, focus tracking, workspace management, keybindings and
|
|
monitor configuration.
|
|
|
|
Internally it uses a fork of Cogl, a hardware acceleration abstraction library
|
|
used to simplify usage of OpenGL pipelines, as well as a fork af Clutter, a
|
|
scene graph and user interface toolkit.
|
|
|
|
Mutter is used by, for example, GNOME Shell, the GNOME core user interface, and
|
|
by Gala, elementary OS's window manager. It can also be run standalone, using
|
|
the command "mutter", but just running plain mutter is only intended for
|
|
debugging purposes.
|
|
|
|
## Contributing
|
|
|
|
To contribute, open merge requests at https://gitlab.gnome.org/GNOME/mutter.
|
|
|
|
It can be useful to look at the documentation available at the
|
|
[Wiki](https://gitlab.gnome.org/GNOME/mutter/-/wikis/home).
|
|
|
|
## Coding style and conventions
|
|
|
|
The coding style used is primarily the GNU flavor of the [GNOME coding
|
|
style](https://developer.gnome.org/programming-guidelines/stable/c-coding-style.html.en)
|
|
with some additions:
|
|
|
|
- Use regular C types and `stdint.h` types instead of GLib fundamental
|
|
types, except for `gboolean`, and `guint`/`gulong` for GSource ids and
|
|
signal handler ids. That means e.g. `uint64_t` instead of `guint64`, `int`
|
|
instead of `gint`, `unsigned int` instead of `guint` if unsignedness
|
|
is of importance, `uint8_t` instead of `guchar`, and so on.
|
|
|
|
- Try to to limit line length to 80 characters, although it's not a
|
|
strict limit.
|
|
|
|
- Usage of g_autofree and g_autoptr are encouraged. The style used is
|
|
|
|
```c
|
|
g_autofree char *text = NULL;
|
|
g_autoptr (MetaSomeThing) thing = NULL;
|
|
|
|
text = g_strdup_printf ("The text: %d", a_number);
|
|
thing = g_object_new (META_TYPE_SOME_THING,
|
|
"text", text,
|
|
NULL);
|
|
thinger_use_thing (rocket, thing);
|
|
```
|
|
|
|
- Declare variables at the top of the block they are used, but avoid
|
|
non-trivial logic among variable declarations. Non-trivial logic can be
|
|
getting a pointer that may be `NULL`, any kind of math, or anything
|
|
that may have side effects.
|
|
|
|
- Instead of boolean arguments in functions, prefer enums or flags when
|
|
they're more expressive.
|
|
|
|
- Use `g_new0()` etc instead of `g_slice_new0()`.
|
|
|
|
- Initialize and assign floating point variables (i.e. `float` or
|
|
`double`) using the form `floating_point = 3.14159` or `ratio = 2.0`.
|
|
|
|
## Git messages
|
|
|
|
Commit messages should follow the [GNOME commit message
|
|
guidelines](https://wiki.gnome.org/Git/CommitMessages). We require an URL
|
|
to either an issue or a merge request in each commit. Try to always prefix
|
|
commit subjects with a relevant topic, such as `compositor:` or
|
|
`clutter/actor:`, and it's always better to write too much in the commit
|
|
message body than too little.
|
|
|
|
## License
|
|
|
|
Mutter is distributed under the terms of the GNU General Public License,
|
|
version 2 or later. See the [COPYING][license] file for detalis.
|
|
|
|
[bug-tracker]: https://gitlab.gnome.org/GNOME/mutter/issues
|
|
[license]: COPYING
|