b69d2aa6a0
Clutter stage used to compute the initial projection using a fixed z translation which wasn't matching the one we computed in calculate_z_translation(). This caused to have a wrong initial projection on startup which was then correctly recomputed only at the first paint. However, since this calculation doesn't depend on view, but only on viewport size, perspective's fovy and z_near we can safely do this at startup and only when any of those parameters change. Then we can move the computation out _clutter_stage_maybe_setup_viewport() since the cogl framebuffer viewport sizes aren't affecting this. Fixes https://gitlab.gnome.org/GNOME/gnome-shell/issues/1639 https://gitlab.gnome.org/GNOME/mutter/merge_requests/803
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.