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Jonas Dreßler abecf557bf clutter/box-layout: Don't cast children sizes to integers 
The distribute_natural_allocation() function was copied over from Gtk to
Clutter 11 years ago with commit e636a0bbce.
Gtk only supports integers sizes in its layout machinery, while Clutter
does everything using floats.

Since this function sets the minimum_size (the size we allocate the
children in the end) to an integer, this means we're implicitly
typecasting floats to integers here, effectively floor()'ing all sizes
that we allocate the box children.

A bug this caused in gnome-shell was that a scrollView (like the one in
the endSessionDialog) was showing scrollbars even though the content
perfectly fit inside the view: Say the content and its scrollView parent
request a size of 63.9 px, but get allocated a size of 63 px by a box
layout. Now the scrollView notices that its allocated size is smaller
than the requested size and thus shows a scrollbar.

So fix that and use floats in distribute_natural_allocation() instead of
integers, as we do everywhere else in the layout machinery.

Part-of: <https://gitlab.gnome.org/GNOME/mutter/-/merge_requests/2284>
2022-02-14 14:24:41 +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/box-layout: Don't cast children sizes to integers 2022-02-14 14:24:41 +00:00
cogl cogl/renderer: Add 'is_dma_buf_supported()' vfunc 2022-02-07 10:56:57 +00:00
data backend/native: Only disable dmabuf screen cast when not hw accelerated 2022-02-07 19:16:45 +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 Russian translation 2022-02-13 16:19:13 +00:00
src wayland: Warn and fix accounting on missed CLUTTER_TOUCH_END events 2022-02-14 13:54:33 +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 build: bump ABI to sysprof-capture-4 2020-07-28 11:13:30 -07:00
.gitlab-ci.yml ci: Build Xserver from git 2022-01-26 14:42:22 +01:00
check-style.py ci: Avoid deadlock while reading uncrustify output 2021-08-23 17:40:43 +02:00
config.h.meson xwayland: Use Xwayland auto-terminate feature 2022-01-26 14:42:22 +01:00
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 xwayland: Use Xwayland auto-terminate feature 2022-01-26 14:42:22 +01:00
meson.build build: Bump pipewire dependency 2022-02-07 10:56:57 +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.alpha 2022-01-10 19:30:19 +01:00
README.md docs: Add README section for default branch 2021-07-18 23:14:16 +02:00

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.

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.