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a simple Wayland output mirror client

wl-mirror - a simple Wayland output mirror client wl-mirror attempts to provide a solution to sway's lack of output mirroring by mirroring an output o
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Category: C/C++ / Miscellaneous
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Last update: Nov 15, 2021
Resource links
https://github.com/Ferdi265/wl-mirror

wl-mirror - a simple Wayland output mirror client

wl-mirror attempts to provide a solution to sway's lack of output mirroring by mirroring an output onto a client surface.

This project is currently a working prototype, but work is still ongoing.

Features

  • Mirror an output onto a resizable window
  • Mirror an output onto another output by fullscreening the window
  • Reacts to changes in output scale
  • Preserves aspect ratio

demo screenshot

Usage

usage: wl-mirror [options] <output>

options:
  -h,   --help             show this help
  -v,   --verbose          enable debug logging
  -c,   --show-cursor      show the cursor on the mirrored screen (default)
  -n,   --no-show-cursor   don't show the cursor on the mirrored screen
  -s l, --scaling linear   use linear scaling (default)
  -s n, --scaling nearest  use nearest neighbor scaling
  -s e, --scaling exact    only scale to exact multiples of the output size

Dependencies

  • CMake
  • libwayland-client
  • libwayland-egl
  • libEGL
  • libGLESv2
  • wayland-scanner

Building

  • Install Dependencies
  • Clone Submodules
  • Run cmake -B build
  • Run make -C build

Files

  • src/main.c: main entrypoint
  • src/wayland.c: Wayland and xdg_surface boilerplate
  • src/egl.c: EGL boilerplate
  • src/mirror.c: output mirroring code
0 Open More issues
Closed

Black output when mirroring monitor connected to secondary (nouveau) GPU

I have 2 GPUS, each has one monitor connected. I can easily mirror the monitor connected to my intel (main) GPU, but trying to mirror monitor connected to secondary GPU (nouveau) only results in black "screen".

OBS/pipewire has no problem sharing the secondary screen so I assume it's possible at least in some way. I can provide more detailed info if needed.

I also personally don't need this to work (since I'd use this on a laptop with just one GPU) but I thought I'd still file this in case you'd want to investigate/fix

bug 
opened Nov 18, 2021 by sochotnicky 11
Closed

v0.9.0 fails to build on non-Linux

Regressed by 7a78782f311d. Affects FreeBSD package.

src/mirror-screencopy.c:165:27: warning: implicit declaration of function 'mremap' is invalid in C99 [-Wimplicit-function-declaration]
        void * new_addr = mremap(backend->shm_addr, backend->shm_size, new_size, MREMAP_MAYMOVE);
                          ^
src/mirror-screencopy.c:165:82: error: use of undeclared identifier 'MREMAP_MAYMOVE'
        void * new_addr = mremap(backend->shm_addr, backend->shm_size, new_size, MREMAP_MAYMOVE);
                                                                                 ^

Note, all other wlr-screencopy-unstable-v1 clients (e.g., grim, wayvnc, waypipe, wf-recorder, xdg-desktop-portal-wlr) work fine on FreeBSD (and DragonFly).

bug 
opened Mar 27, 2022 by jbeich 4
Closed

Screencopy Backend does not work on latest Sway (1.8-dev-956b689d)

For some reason the screencopy backend has stopped working on the latest release of sway. The reason for this is still unknown, investigation ongoing.

bug upstream-bug 
opened Jun 5, 2022 by Ferdi265 3
Closed

Include protocols in release tarballs

wlr-protocols are generally not packaged in distributions (there's not even a release, even wlroots itself copies what it needs (see https://gitlab.freedesktop.org/wlroots/wlroots/-/tree/master/protocol).

IMO It would be better if you included the protocols you need - at least in the release tarballs. Though you might want to consider making a copy of needed protocols just like wlroots itself does even in the git repo. After all - it's not very likely to change all that much.

enhancement 
opened Nov 24, 2021 by sochotnicky 3
Closed

Mirror a region of the screen

It would be nice to pass some coordinates to wl-mirror that defines a rectangle to mirror. (see slurp command). A lot of interesting workflows could arise combining it with swaywm virtual outputs

(reference) https://www.reddit.com/r/swaywm/comments/k1zl41/thank_you_devs_free_ipad_repurposed_as_a_second/

enhancement 
opened Nov 16, 2021 by victordiaz 3
Closed

Unbreak manpage installation

CMAKE_INSTALL_BINDIR is not affected due to hardcoded fallback using relative rather than absolute path.

opened Jul 19, 2022 by jbeich 2
Open

Support more scaling filters such as Bicubic or Lanczos

I just thought it would be cool to have a few more scaling filters available, like bicubic and lanczos. Bicubic has looked a bit nicer for downscaling in my experience!

enhancement 
opened Mar 18, 2022 by Sukid 1

Contents

    vially Easily browse and read Wayland protocols documentation
    acro5piano Dynamic key remapper for Wayland Window System, especially for Sway
    smithay smithay-client-toolkit - Toolkit for making client wayland applications
    mafintosh Small module to mirror a folder to another folder. Supports live mode as well.
    dbarobin Awesome mirror.xyz.
    yusukebe mirror is command line tool for mirroring a web page.
    rajveermalviya Wayland implementation in Go
    majestrate st fork for wayland
    MichMich MagicMirror² is an open source modular smart mirror platform. With a growing list of installable modules, the MagicMirror² allows you to convert your hallway or bathroom mirror into your personal assistant.
    sjtug An all-in-one mirror utility for SJTUG mirror
    lilydjwg A D-Bus task API for Wayland
    JoshMcguigan Native wayland desktop notifications - a drop-in replacement for swaynag written in rust
    DorianRudolph Simple app launcher for wayland written in rust
    kellyjonbrazil This tool converts the output of popular command-line tools and file-types to JSON. This allows piping of output to tools like jq.
    philj56 Extremely minimal raw Wayland greeter for greetd.
    sddm QML based X11 and Wayland display manager
    pyloque yet another python client for ssdb
    enigo-rs enigo - Enigo lets you control your mouse and keyboard in an abstract way on different operating systems (currently only Linux, macOS, Win – Redox and *BSD planned)
    way-cooler rustwlc - wlc Wayland library bindings for Rust
    toyota-connected Embedded Flutter runtime targeting Embedded Linux with Wayland
    HeavyRain266 AwesomeWM but oxidized and rewritten as Wayland Compositor
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