be4e6484ae
When creating a render device, we create a temporary EGLContext where we then query the `GL_RENDERER` string to check whether the renderer is any of the known software renderers. After we're done, we destroy the context and move on. This should be fine as according to specification eglDestroyContext(), with the context being actually destroyed a bit later when it's no longer current, but mesa, when running RK3399 (Pinebook Pro), this results in a crash in a future eglMakeCurrent(): #0 in dri_unbind_context () at ../src/gallium/frontends/dri/dri_context.c:266 #1 in driUnbindContext () at ../src/gallium/frontends/dri/dri_util.c:763 #2 in dri2_make_current () at ../src/egl/drivers/dri2/egl_dri2.c:1814 #3 in eglMakeCurrent () at ../src/egl/main/eglapi.c:907 ... We can avoid this, however, by calling eglMakeCurrent() with EGL_NO_CONTEXT on the EGLDisplay, prior to destroying, effectively avoiding the crash, so lets do that. Related: https://gitlab.freedesktop.org/mesa/mesa/-/issues/7194 Closes: https://gitlab.gnome.org/GNOME/mutter/-/issues/2414 Part-of: <https://gitlab.gnome.org/GNOME/mutter/-/merge_requests/2612>
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 of 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.
The API documentation is available at:
- Meta: https://gnome.pages.gitlab.gnome.org/mutter/meta/
- Clutter: https://gnome.pages.gitlab.gnome.org/mutter/clutter/
- Cally: https://gnome.pages.gitlab.gnome.org/mutter/cally/
- Cogl: https://gnome.pages.gitlab.gnome.org/mutter/cogl/
- CoglPango: https://gnome.pages.gitlab.gnome.org/mutter/cogl-pango/
Coding style and conventions
See HACKING.md.
Git messages
Commit messages should follow the GNOME commit message
guidelines. 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.
Default branch
The default development branch is main. If you still have a local
checkout under the old name, use:
git checkout master
git branch -m master main
git fetch
git branch --unset-upstream
git branch -u origin/main
git symbolic-ref refs/remotes/origin/HEAD refs/remotes/origin/main
License
Mutter is distributed under the terms of the GNU General Public License, version 2 or later. See the COPYING file for detalis.