a3fb239344
Up until now, we didn't support sending YUV textures to the Wayland server. This was for several reasons: * We draw onto an RGBA framebuffer, so any other color format needs to be converted to that color space. Since we don't want to lose a lot of performance, this is ideally done on the GPU (using shaders). * YUV formats can consist of several planes (for example NV12, a common format in decoded video frames consists of a Y-plane and a subsampled UV-plane). Mutter always assumed that any texture it got was representable by a `CoglTexture`, which does not have this kind of concept. To deal with this, we introduce a new "texture": a `CoglMultiPlaneTexture` which consists of multiple CoglTextures, each representing a plane in the texture we got. It also provides support for CoglSnippets which can convert the colorspace if necessary. What changes are in this commit: * Introduce a new CoglMultiPlaneTexture object. Right now it is not implemented as a CoglTexture to prevent any confusion (but it is somewhat related to CoglMetaTexture) * Added some extra values to the CoglPixelFormat enum that deal with YUV * Make the necessary changes in MetaWaylandBuffer, so that it knows how to deal with incoming buffers (for example EGLImages and shm buffers) * This also introduces some changes in MetaDmaBuf, as that is also a different kind of buffer we can receive from wayland. Acknowledgements * There was a lot of prior art already done by the authors of Weston, CoglGstVideoSink and ClutterGstSink * My employer Barco for allowing me to work on this |
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| .gitlab-ci | ||
| clutter | ||
| cogl | ||
| data | ||
| doc | ||
| 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.