f037c9df66
When building the list of formats to be sent as part of the scanout tranche, avoid requiring modifier support by the DRM driver for formats relying on implicit modifiers (DRM_FORMAT_MOD_INVALID). Specifically, the previous check required the DRM driver to have advertised some modifier support for the given format in its IN_FORMATS KMS plane property, regardless of modifier it was. If it hadn't, the format was left out of the list of formats to be sent in the scanout tranche. When no formats remained to be sent in the scanout tranche, the tranche simply wasn't sent. This resulted in the scanout tranche never being sent for GPUs where modifiers aren't supported. In those cases, no formats are advertised using the IN_FORMATS property, and thus the list of formats to be sent in the scanout tranche remained empty. Since Mesa doesn't use scanout-compatible buffers for native Wayland clients unless specifically requested to do so using the "scanout" tranche flag, it effectively means that direct scanout of native Wayland clients wasn't supported for GPUs without modifiers support. Sending a tranche with formats paired with the implicit modifier (DRM_FORMAT_MOD_INVALID) is both allowed by the protocol and is already done by default for GPUs with modifiers support, unless the experimental support for explicit modifiers is enabled in Mutter. So instead of requiring modifiers to be supported for each format being evaluated for the scanout tranche, when processing formats which rely on implicit modifiers, only check if the format in question is supported by the DRM driver for scanout on the primary plane. Part-of: <https://gitlab.gnome.org/GNOME/mutter/-/merge_requests/2510> |
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| .gitlab/issue_templates | ||
| .gitlab-ci | ||
| clutter | ||
| cogl | ||
| data | ||
| doc | ||
| meson | ||
| po | ||
| src | ||
| subprojects | ||
| tools | ||
| .gitignore | ||
| .gitlab-ci.yml | ||
| check-style.py | ||
| config.h.meson | ||
| COPYING | ||
| HACKING.md | ||
| meson_options.txt | ||
| meson.build | ||
| mutter.doap | ||
| NEWS | ||
| README.md | ||
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.
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.