22f865122c
Mutter prefers platform devices over anything else as the primary GPU. This will not work too well, when a platform device does not actually have a rendering GPU but is a display-only device. An example of this are DisplayLink devices with the proprietary driver stack, which exposes a DRM KMS platform device but without any rendering driver. Mutter cannot rely on EGL init failing on such devices either, because nowadays Mesa supports software renderers on GBM, so the initialization may well succeed. The hardware rendering capability is recognized by matching the GL renderer string to the known Mesa software renderers. At this time, there is no better alternative to detecting this. The secondary GPU data is abused for the GL renderer, as the Cogl context may not have been created yet. Also, the Cogl context would only be created on the primary GPU, but at this point the primary GPU has not been chosen yet. Hence, GPU copy path GL context is used as a proxy and predictor of what the Cogl context might be if it was created. Mind, that even the GL flavour are not the same between Cogl and secondary contexts, so this is stretch but it should be just enough. The logic to choose the primary GPU is changed to always prefer hardware rendering devices while also maintaining the old order of preferring platform over boot_vga devices. Co-authored by: Emilio Pozuelo Monfort <emilio.pozuelo@collabora.co.uk> https://gitlab.gnome.org/GNOME/mutter/merge_requests/271 |
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| .gitlab-ci | ||
| clutter | ||
| cogl | ||
| data | ||
| doc | ||
| po | ||
| src | ||
| tools | ||
| .gitignore | ||
| .gitlab-ci.yml | ||
| config.h.meson | ||
| COPYING | ||
| 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.
License
Mutter is distributed under the terms of the GNU General Public License, version 2 or later. See the COPYING file for detalis.