40c345d6f3
For HiDPI pointer cursors backed by Wayland surfaces, the hotspot must be placed using integers on the logical pixel grid. In practice what this means is that if the client loads a cursor sprite with the buffer scale 2, and it's hotspot is not dividable by 2, it will be rounded down to an integer that can. E.g. a wl_surface with buffer scale 2 and a cursor image with hotspot coordinate (7, 7) will have the coordinate (3.5, 3.5) in surface coordinate space, and will in practice be rounded down to (3, 3) as the hotspot position in wl_pointer only takes integers. To not potentially shift by 1 pixel on HiDPI monitors when switching between wl_surface backend cursor sprites and built-in ones, make the built in one emulate the restrictions put up by the Wayland protocol. This also initializes the theme scale of the xcursor sprite instances to 1, as they may not have been set prior to being used, it'll only happen in response to "prepare-at" signals being emitted prior to rendering. Fixes: https://gitlab.gnome.org/GNOME/mutter/issues/1092 https://gitlab.gnome.org/GNOME/mutter/-/merge_requests/1107 |
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| .gitlab/issue_templates | ||
| .gitlab-ci | ||
| clutter | ||
| cogl | ||
| data | ||
| doc | ||
| meson | ||
| 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.
Contributing
To contribute, open merge requests at https://gitlab.gnome.org/GNOME/mutter.
The coding style used is primarily the GNU flavor of the GNOME coding
style
with some minor additions such as preferring stdint.h types over GLib
fundamental types, and a soft 80 character line limit. However, in general,
look at the file you're editing for inspiration.
Commit messages should follow the GNOME commit message guidelines. We require an URL to either an issue or a merge request in each commit.
License
Mutter is distributed under the terms of the GNU General Public License, version 2 or later. See the COPYING file for detalis.