ee4638ef5c
Unknown since when, we started deferring the eglMakeCurrent for the current framebuffer till we started painting on it, which means we are preparing for rendering a view without guarantees that the framebuffer we will paint to is the current drawing surface for the EGL context. A fairly common case where that assumption will break is multimonitor set ups, in this case we will be preparing to paint to a view while the current draw surface is that of the previously rendered view's. Mesa will in this case return EGL_BAD_SURFACE when querying the buffer age, since the surface is not yet the current draw surface. This makes us give up on buffer age checks, and paint the whole view. Since the problem repeats when painting the next view, we are effectively doing full-screen redraws on all monitors. Since cogl usually works implicitly, and querying the buffer age is meaningless if you're not meant to paint on a surface, make the surface the current draw surface implicitly before querying the buffer age. This brings us glorious partial invalidations back when several views had to be repainted. https://gitlab.gnome.org/GNOME/mutter/merge_requests/906 |
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| .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.