72692b1144
`distribute_natural_allocation` expects an input >= 0 of type `gint`. In `get_preferred_size_for_opposite_orientation` it is used with an unchecked variable `size` of type `gfloat`, which in case it is `Infinity`, gets passed on in the macro `MAX (0, size)`. `Infinity` becomes `G_MININT` when implicitly casted to `gint` in `distribute_natural_allocation`, triggering the assertion `extra_space >= 0`. The resulting warning in the log is counter intuitive and not very helpful. Use `float` in `distribute_natural_allocation` instead of `gint` and assert on denormal values so we can more easily identify bugs. Additionally change some types while at it and add a even more expressive warning referencing the actor at one point. https://gitlab.gnome.org/GNOME/mutter/merge_requests/375
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.