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Jonas Ådahl 53b52e26f5 screen-cast/monitor: Always use clutter_stage_paint_to_framebuffer() 
'screen-cast/monitor-src: Use clutter_stage_paint_to_buffer'
(6c818cd8d5) made the non-dma-buf path use
clutter_stage_paint_to_buffer() to avoid running into direct scanout
issues. At a glance, the dma-buf paths didn't have the same issue since
it explicitly handled dma-bufs by blitting them.

What it also did was move the recording to an idle callback, to avoid
paint reentry issues. A side effect of this, however, is that it also
broke the dma-buf paths, as they rely on the back buffer existing, and
the stage view direct scanout already being setup, which it isn't in an
idle callback.

Fix this by using the dma-buf variant of
clutter_stage_paint_to_buffer(): clutter_stage_paint_to_framebuffer().
This has some negative performance impact, but we can't use
cogl_blit_framebuffer() when using an idle callback for recording.

Potential performance improvements to make things work more as they did
before is to enhance 'cogl_blit_framebuffer()' a bit, making it a vfunc
that could be implemented by MetaOnscreenNative. A flag to say whether
to look at the back or front buffer would let MetaOnscreenNative know
whether to use the already committed-to-KMS buffer, or the current back
buffer.

Fixes: 6c818cd8d5
Closes: https://gitlab.gnome.org/GNOME/mutter/-/issues/2282
Part-of: <https://gitlab.gnome.org/GNOME/mutter/-/merge_requests/2462>
2022-06-28 09:54:40 +00:00
.gitlab/issue_templates gitlab: Add missing < in markdown comment tag 2020-02-14 03:10:28 +00:00
.gitlab-ci ci: Make run-tests.sh usable for the dist job too 2022-01-04 12:07:06 +01:00
clutter clutter: Attach color state information to actors 2022-06-09 15:00:07 +00:00
cogl cogl: Drop CoglHandleObject and CoglHandleClass 2022-05-31 16:28:16 -03:00
data monitor-manager: Add NightLightSupported property to DisplayConfig 2022-05-17 08:42:25 +00:00
doc doc: Add monitor configuration documentation 2022-01-25 16:25:48 +00:00
meson build: Check NEWS for version 2021-09-05 00:15:56 +02:00
po Update Nepali translation 2022-05-20 09:33:30 +00:00
src screen-cast/monitor: Always use clutter_stage_paint_to_framebuffer() 2022-06-28 09:54:40 +00:00
subprojects build: bump ABI to sysprof-capture-4 2020-07-28 11:13:30 -07:00
tools tools/uncrustify: Remove space between i18n function shortcuts and ( 2021-12-09 20:59:49 +01:00
.gitignore wayland: Remove Gtk primary selection protocol 2022-05-18 20:15:08 +00:00
.gitlab-ci.yml ci: Build and deploy documentations 2022-06-03 16:56:49 +00:00
check-style.py ci: Avoid deadlock while reading uncrustify output 2021-08-23 17:40:43 +02:00
config.h.meson build: Add X11/XWayland config options 2022-05-25 16:42:04 +02:00
COPYING Updated obsolete FSF postal address in COPYING 2014-01-12 08:44:30 +07:00
HACKING.md docs: Update coding style link 2021-11-09 19:52:14 +01:00
meson_options.txt meson: Allow to build without gnome-desktop 2022-03-03 15:07:38 +00:00
meson.build tests: Add basic X11 WM test 2022-06-02 17:19:42 +00:00
mutter.doap mutter.doap: Add marge-bot as a maintainer 2020-11-16 11:59:45 +01:00
NEWS Bump version to 42.1 2022-05-05 21:01:38 +02:00
README.md readme: Add links to the API documentation 2022-06-14 15:15:08 +00:00

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.

It can be useful to look at the documentation available at the Wiki.

The API documentation is available at:

Coding style and conventions

See HACKING.md.

Git messages

Commit messages should follow the GNOME commit message guidelines. We require an URL to either an issue or a merge request in each commit. Try to always prefix commit subjects with a relevant topic, such as compositor: or clutter/actor:, and it's always better to write too much in the commit message body than too little.

Default branch

The default development branch is main. If you still have a local checkout under the old name, use:

git checkout master
git branch -m master main
git fetch
git branch --unset-upstream
git branch -u origin/main
git symbolic-ref refs/remotes/origin/HEAD refs/remotes/origin/main

License

Mutter is distributed under the terms of the GNU General Public License, version 2 or later. See the COPYING file for detalis.