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Simon Ser d71ed635b9 backend/drm: force linear layout for multi-GPU buffers
Some buffers need to be copied across GPUs. Such buffers need to be
allocated with a format and modifier suitable for both the source
and the destination.

When explicit modifiers aren't supported, we were forcing the buffers
to be allocated with a linear layout, because implicit modifiers
aren't portable across GPUs. All is well with this case.

When explicit modifiers are supported, we were advertising the whole
list of destination modifiers, in the hope that the source might
have some in common and might be able to allocate a buffer with a
more optimized layout. This works well if the source supports explicit
modifiers. However, if the source doesn't, then wlr_drm_format_intersect
will fallback to implicit modifiers, and everything goes boom: the
source uses a GPU-specific tiling and the destination interprets it
as linear.

To avoid this, just force linear unconditionally. We'll be able to
revert this once we have a good way to indicate that an implicit modifier
isn't supported in wlr_drm_format_set, see [1].

[1]: https://github.com/swaywm/wlroots/pull/2815

Closes: https://github.com/swaywm/wlroots/issues/3030
2021-07-08 17:06:20 +02:00
.builds ci: make Meson warnings fatal 2021-06-25 10:01:25 -04:00
backend backend/drm: force linear layout for multi-GPU buffers 2021-07-08 17:06:20 +02:00
docs render: introduce WLR_RENDERER in wlr_renderer_autocreate_with_drm_fd 2021-04-20 21:14:27 +02:00
examples move wlr_box from /types to /util 2021-07-06 21:43:17 +02:00
include seat: add wlr_seat_touch_{send,notify}_frame 2021-07-08 09:12:17 +02:00
protocol xdg-activation-v1: new protocol implementation 2021-06-02 11:18:25 +02:00
render move wlr_box from /types to /util 2021-07-06 21:43:17 +02:00
tinywl Stop specifying xkb_rule_names 2021-04-19 17:33:28 +02:00
types Fix invalid uses of wl_array_for_each 2021-07-08 10:08:47 -04:00
util move wlr_box from /types to /util 2021-07-06 21:43:17 +02:00
xcursor xcursor: fix CVE-2013-2003 2021-05-02 17:04:59 +02:00
xwayland xwayland: improve startup log message 2021-06-25 10:54:10 +02:00
.editorconfig Set .editorconfig ident_size 2019-01-25 11:37:46 +01:00
.gitignore Remove rootston 2019-08-09 08:34:59 +09:00
CONTRIBUTING.md contributing: add link to IRC web chat 2021-05-26 22:21:06 +02:00
LICENSE Update LICENSE year (MIT license) 2018-04-12 21:29:59 -04:00
README.md readme: fix broken IRC web client link 2021-05-26 22:19:41 +02:00
meson.build build: use meson.global_build_root() 2021-06-25 10:01:25 -04:00
meson_options.txt render: make GLES2 renderer optional 2021-04-17 16:39:40 +02:00
wlroots.syms build: simplify version script 2021-06-17 11:03:21 +02:00

README.md

wlroots

Pluggable, composable, unopinionated modules for building a Wayland compositor; or about 50,000 lines of code you were going to write anyway.

  • wlroots provides backends that abstract the underlying display and input hardware, including KMS/DRM, libinput, Wayland, X11, and headless backends, plus any custom backends you choose to write, which can all be created or destroyed at runtime and used in concert with each other.
  • wlroots provides unopinionated, mostly standalone implementations of many Wayland interfaces, both from wayland.xml and various protocol extensions. We also promote the standardization of portable extensions across many compositors.
  • wlroots provides several powerful, standalone, and optional tools that implement components common to many compositors, such as the arrangement of outputs in physical space.
  • wlroots provides an Xwayland abstraction that allows you to have excellent Xwayland support without worrying about writing your own X11 window manager on top of writing your compositor.
  • wlroots provides a renderer abstraction that simple compositors can use to avoid writing GL code directly, but which steps out of the way when your needs demand custom rendering code.

wlroots implements a huge variety of Wayland compositor features and implements them right, so you can focus on the features that make your compositor unique. By using wlroots, you get high performance, excellent hardware compatibility, broad support for many wayland interfaces, and comfortable development tools - or any subset of these features you like, because all of them work independently of one another and freely compose with anything you want to implement yourself.

Check out our wiki to get started with wlroots. Join our IRC channel: #sway-devel on Libera Chat.

wlroots is developed under the direction of the sway project. A variety of wrapper libraries are available for using it with your favorite programming language.

Building

Install dependencies:

  • meson
  • wayland
  • wayland-protocols
  • EGL
  • GLESv2
  • libdrm
  • GBM
  • libinput
  • xkbcommon
  • udev
  • pixman
  • libseat

If you choose to enable X11 support:

  • xwayland (build-time only, optional at runtime)
  • libxcb
  • libxcb-render-util
  • libxcb-wm
  • libxcb-errors (optional, for improved error reporting)

Run these commands:

meson build/
ninja -C build/

Install like so:

sudo ninja -C build/ install

Contributing

See CONTRIBUTING.md.