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Steven Newbury ad06c12c89 util: Fix infinite loop in recursive function
When testing Xwayland multi-HiDPI support with Wine + SimCity4
I encountered a 100% CPU lockup from sway.  This turned out to be
triggering a bug in the wlroots pointer contraint code.

region_confine() contains multiple recursive calls where arguments
are modified and resubmitted to the function.  One of the calls
is however made using the original arguments, if/when this triggers
it results in the same codepath being followed each loop so the
condition always applies.

It makes much more sense if this was intended to apply the clamped
values x,y instead of the original x1,y1, and indeed this fixes the
infinite loop and results in correct behaviour.
2022-05-24 20:39:32 +00:00
.builds ci/archlinux: enable address and undefined sanitizers 2021-11-19 16:42:14 +00:00
backend backend/drm: fetch EDID manufacturer from udev_hwdb 2022-05-11 14:06:11 +00:00
docs wlr_scene: Parse out WLR_SCENE_DEBUG_DAMAGE 2022-05-23 15:43:18 -04:00
examples wlr_scene: Refactor wlr_scene_surface to be a helper on top of wlr_scene_buffer 2022-05-19 14:26:50 -04:00
include build: bump version to 0.16.0-dev 2022-05-24 15:04:14 +02:00
protocol ext-session-lock-v1: new protocol implementation 2022-02-02 15:22:02 +01:00
render render/gles: add support for some 16-bpc unsigned shm formats 2022-05-07 16:25:38 +00:00
tinywl wlr_scene: Refactor wlr_scene_surface to be a helper on top of wlr_scene_buffer 2022-05-19 14:26:50 -04:00
types wlr_scene: Hook up HIGHLIGHT logic 2022-05-23 15:58:49 -04:00
util util: Fix infinite loop in recursive function 2022-05-24 20:39:32 +00:00
xcursor xcursor: check that XDG base directory path is absolute 2022-05-02 15:15:24 +02:00
xwayland xwayland: Add support for -force-xrandr-emulation 2022-05-23 07:30:28 +00:00
.editorconfig editorconfig: set max_line_length 2022-01-20 15:09:15 +01:00
.gitignore Remove rootston 2019-08-09 08:34:59 +09:00
.gitlab-ci.yml ci: add .gitlab-ci.yml 2021-11-01 16:51:18 +01:00
CONTRIBUTING.md CONTRIBUTING.md: update init/finish description 2022-04-28 08:30:26 +00:00
LICENSE Update LICENSE year (MIT license) 2018-04-12 21:29:59 -04:00
README.md readme: drop mention of the Sway project 2022-01-09 12:01:58 +01:00
meson.build build: bump version to 0.16.0-dev 2022-05-24 15:04:14 +02:00
meson_options.txt render/vulkan: add Vulkan renderer 2021-10-18 11:51:13 +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 60,000 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.

A variety of wrapper libraries are available for using it with your favorite programming language.

Building

Install dependencies:

  • meson
  • wayland
  • wayland-protocols
  • EGL and GLESv2 (optional, for the GLES2 renderer)
  • Vulkan loader, headers and glslang (optional, for the Vulkan renderer)
  • libdrm
  • GBM
  • libinput (optional, for the libinput backend)
  • 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.