4d465eac08
For historical reasons meta_monitor_is_active() checked whether it is active by checking whether the main output have a CRTC assigned and whether that CRTC has a current mode. At a later point, the MetaMonitor got its own mode abstraction (MetaMonitorMode), but meta_monitor_is_active() was never updated to use this. An issue with checking the main output's CRTC state is that, if there is some CRTC mode combination that for some reason isn't properly detected by the MetaMonitorMode abstraction (e.g. some tiling configuration not yet handled), meta_monitor_is_active() would return TRUE, even though no (abstracted) mode was set. This would cause confusion here and there, leading to NULL pointer dereferences due to the assumption that if a monitor is active, it has an active mode. Instead, change meta_monitor_is_active() to directly check the current monitor mode, and log a warning if the main output still happen to have a CRTC with a mode assigned to it. This way, when an not undrestood CRTC mode combination is encountered, instead of dereferencing NULL pointers, simply assume the monitor is not active, which means that it will not be managed or rendered by mutter at all. https://gitlab.gnome.org/GNOME/mutter/issues/130 |
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| clutter | ||
| cogl | ||
| data | ||
| doc | ||
| po | ||
| src | ||
| tools | ||
| .gitignore | ||
| autogen.sh | ||
| configure.ac | ||
| COPYING | ||
| Makefile.am | ||
| 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 GNOME Shell, the GNOME core user interface. 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.