Initial Commit

This commit is contained in:
lelgenio 2023-05-31 20:11:10 -03:00
commit 9e231676f7
7 changed files with 855 additions and 0 deletions

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.envrc Normal file
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use_flake

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.gitignore vendored Normal file
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/target
.direnv/

486
Cargo.lock generated Normal file
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Cargo.toml Normal file
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[package]
name = "wl-crosshair"
version = "0.1.0"
edition = "2021"
[dependencies]
wayland-client = "0.30.2"
wayland-protocols = { version = "0.30.0", features = ["client"] }
wayland-protocols-wlr = { version = "0.1.0", features = ["client"] }
log = { version = "0.4", optional = true }
tempfile = "3.2"

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flake.lock Normal file
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{
"nodes": {
"flake-utils": {
"inputs": {
"systems": "systems"
},
"locked": {
"lastModified": 1681202837,
"narHash": "sha256-H+Rh19JDwRtpVPAWp64F+rlEtxUWBAQW28eAi3SRSzg=",
"owner": "numtide",
"repo": "flake-utils",
"rev": "cfacdce06f30d2b68473a46042957675eebb3401",
"type": "github"
},
"original": {
"owner": "numtide",
"repo": "flake-utils",
"type": "github"
}
},
"nixpkgs": {
"locked": {
"lastModified": 1684242266,
"narHash": "sha256-uaCQ2k1bmojHKjWQngvnnnxQJMY8zi1zq527HdWgQf8=",
"owner": "NixOS",
"repo": "nixpkgs",
"rev": "7e0743a5aea1dc755d4b761daf75b20aa486fdad",
"type": "github"
},
"original": {
"owner": "NixOS",
"ref": "nixpkgs-unstable",
"repo": "nixpkgs",
"type": "github"
}
},
"root": {
"inputs": {
"flake-utils": "flake-utils",
"nixpkgs": "nixpkgs"
}
},
"systems": {
"locked": {
"lastModified": 1681028828,
"narHash": "sha256-Vy1rq5AaRuLzOxct8nz4T6wlgyUR7zLU309k9mBC768=",
"owner": "nix-systems",
"repo": "default",
"rev": "da67096a3b9bf56a91d16901293e51ba5b49a27e",
"type": "github"
},
"original": {
"owner": "nix-systems",
"repo": "default",
"type": "github"
}
}
},
"root": "root",
"version": 7
}

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flake.nix Normal file
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{
description = "A crosshair overlay for wlroots compositor";
inputs = {
nixpkgs.url = "github:NixOS/nixpkgs/nixpkgs-unstable";
flake-utils.url = "github:numtide/flake-utils";
};
outputs = { self, nixpkgs, flake-utils, ... }:
flake-utils.lib.eachDefaultSystem (system:
let
pkgs = import nixpkgs { inherit system; };
in
{
packages = {
default = self.packages.${system}.wl-crosshair;
wl-crosshair = pkgs.rustPlatform.buildRustPackage {
pname = "wl-crosshair";
version = "0.1.0";
src = ./.;
cargoLock.lockFile = ./Cargo.lock;
};
};
apps = {
default = self.apps.${system}.wl-crosshair;
wl-crosshair = flake-utils.lib.mkApp {
drv = self.packages.${system}.default;
};
};
devShells.default = pkgs.mkShell {
nativeBuildInputs = with pkgs; [
cargo
rustc
rustfmt
];
};
});
}

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src/main.rs Normal file
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use std::{fs::File, io::Write, os::unix::prelude::AsRawFd};
use wayland_client::{
protocol::{
wl_buffer, wl_compositor, wl_keyboard, wl_pointer, wl_registry, wl_seat, wl_shm,
wl_shm_pool, wl_surface,
},
Connection, Dispatch, Proxy, QueueHandle,
};
use wayland_protocols_wlr::layer_shell::v1::client::{
zwlr_layer_shell_v1::{self, Layer},
zwlr_layer_surface_v1::{self, Anchor},
};
use wayland_protocols::xdg::shell::client::xdg_wm_base;
struct State {
running: bool,
cursor_size: u32,
compositor: Option<wl_compositor::WlCompositor>,
base_surface: Option<wl_surface::WlSurface>,
layer_shell: Option<zwlr_layer_shell_v1::ZwlrLayerShellV1>,
layer_surface: Option<zwlr_layer_surface_v1::ZwlrLayerSurfaceV1>,
buffer: Option<wl_buffer::WlBuffer>,
wm_base: Option<xdg_wm_base::XdgWmBase>,
pointer: Option<wl_pointer::WlPointer>,
}
fn main() {
let conn = Connection::connect_to_env().unwrap();
let mut event_queue = conn.new_event_queue();
let qhandle = event_queue.handle();
let display = conn.display();
display.get_registry(&qhandle, ());
let mut state = State {
running: true,
cursor_size: 10,
compositor: None,
base_surface: None,
layer_shell: None,
layer_surface: None,
buffer: None,
wm_base: None,
pointer: None,
};
event_queue.blocking_dispatch(&mut state).unwrap();
if state.layer_shell.is_some() && state.wm_base.is_some() {
state.init_layer_surface(&qhandle);
}
while state.running {
event_queue.blocking_dispatch(&mut state).unwrap();
}
}
impl Dispatch<wl_registry::WlRegistry, ()> for State {
fn event(
state: &mut Self,
registry: &wl_registry::WlRegistry,
event: wl_registry::Event,
_: &(),
_: &Connection,
qh: &QueueHandle<Self>,
) {
eprintln!("WlRegistry event {event:#?}");
if let wl_registry::Event::Global {
name,
interface,
version,
} = event
{
if interface == zwlr_layer_shell_v1::ZwlrLayerShellV1::interface().name {
let wl_layer = registry.bind::<zwlr_layer_shell_v1::ZwlrLayerShellV1, _, _>(
name,
version,
qh,
(),
);
state.layer_shell = Some(wl_layer);
} else if interface == wl_compositor::WlCompositor::interface().name {
let compositor =
registry.bind::<wl_compositor::WlCompositor, _, _>(name, version, qh, ());
let surface = compositor.create_surface(qh, ());
state.base_surface = Some(surface);
state.compositor = Some(compositor);
} else if interface == wl_shm::WlShm::interface().name {
let shm = registry.bind::<wl_shm::WlShm, _, _>(name, version, qh, ());
let (init_w, init_h) = (state.cursor_size, state.cursor_size);
let mut file = tempfile::tempfile().unwrap();
draw(&mut file, (init_w, init_h));
let pool = shm.create_pool(file.as_raw_fd(), (init_w * init_h * 4) as i32, qh, ());
let buffer = pool.create_buffer(
0,
init_w as i32,
init_h as i32,
(init_w * 4) as i32,
wl_shm::Format::Argb8888,
qh,
(),
);
state.buffer = Some(buffer);
} else if interface == wl_seat::WlSeat::interface().name {
let seat = registry.bind::<wl_seat::WlSeat, _, _>(name, version, qh, ());
state.pointer = Some(seat.get_pointer(qh, ()));
} else if interface == xdg_wm_base::XdgWmBase::interface().name {
let wm_base = registry.bind::<xdg_wm_base::XdgWmBase, _, _>(name, 1, qh, ());
state.wm_base = Some(wm_base);
}
}
}
}
impl Dispatch<wl_pointer::WlPointer, ()> for State {
fn event(
state: &mut Self,
_: &wl_pointer::WlPointer,
event: wl_pointer::Event,
_: &(),
_: &Connection,
qh: &QueueHandle<Self>,
) {
eprintln!("WlPointer event {event:#?}");
match event {
wl_pointer::Event::Enter { .. } => {
if let Some(surface) = &state.base_surface {
surface.destroy();
}
state.base_surface = None;
}
wl_pointer::Event::Leave { .. } => {
let surface = state.compositor.as_ref().unwrap().create_surface(qh, ());
state.base_surface = Some(surface);
state.init_layer_surface(qh);
}
_ => {}
}
}
}
fn draw(tmp: &mut File, (buf_x, buf_y): (u32, u32)) {
let mut buf = std::io::BufWriter::new(tmp);
for y in 0..buf_y {
for x in 0..buf_x {
let ix = x as i32;
let iy = y as i32;
let dist = if x <= (buf_x / 2) {
ix + iy - (buf_y as i32)
} else {
iy - ix
};
let a: u32 = match dist.abs() {
0 => 0xFF,
1 => 0x88,
_ => 0x00,
};
let c: u32 = match dist.abs() {
0 => 0xFF,
1 => 0x88,
_ => 0x00,
};
let color = (a << 24) + (c << 16) + (c << 8) + c;
buf.write_all(&color.to_ne_bytes()).unwrap();
}
}
buf.flush().unwrap();
}
impl State {
fn init_layer_surface(&mut self, qh: &QueueHandle<State>) {
let layer = self.layer_shell.as_ref().unwrap().get_layer_surface(
self.base_surface.as_ref().unwrap(),
None,
Layer::Overlay,
"crosshair".to_string(),
qh,
(),
);
// Center the window
layer.set_anchor(Anchor::Top | Anchor::Right | Anchor::Bottom | Anchor::Left);
layer.set_keyboard_interactivity(zwlr_layer_surface_v1::KeyboardInteractivity::None);
layer.set_size(self.cursor_size, self.cursor_size);
// A negative value means we will be centered on the screen
// independently of any other xdg_layer_shell
layer.set_exclusive_zone(-1);
self.base_surface.as_ref().unwrap().commit();
self.layer_surface = Some(layer);
}
}
impl Dispatch<zwlr_layer_surface_v1::ZwlrLayerSurfaceV1, ()> for State {
fn event(
state: &mut Self,
surface: &zwlr_layer_surface_v1::ZwlrLayerSurfaceV1,
event: <zwlr_layer_surface_v1::ZwlrLayerSurfaceV1 as Proxy>::Event,
_data: &(),
_conn: &Connection,
_qhandle: &QueueHandle<Self>,
) {
eprintln!("ZwlrLayerSurfaceV1 event {event:#?}");
if let zwlr_layer_surface_v1::Event::Configure { serial, .. } = event {
surface.ack_configure(serial);
if let (Some(surface), Some(buffer)) = (&state.base_surface, &state.buffer) {
surface.attach(Some(buffer), 0, 0);
surface.commit();
}
}
}
}
// ignored
macro_rules! impl_dispatch_log {
($DispatchStruct: path) => {
impl Dispatch<$DispatchStruct, ()> for State {
fn event(
_: &mut Self,
_: &$DispatchStruct,
event: <$DispatchStruct as Proxy>::Event,
_: &(),
_: &Connection,
_: &QueueHandle<Self>,
) {
eprintln!("{} event {:#?}", stringify!($DispatchStruct), event);
}
}
};
}
impl_dispatch_log!(wl_buffer::WlBuffer);
impl_dispatch_log!(wl_compositor::WlCompositor);
impl_dispatch_log!(wl_keyboard::WlKeyboard);
impl_dispatch_log!(wl_seat::WlSeat);
impl_dispatch_log!(wl_shm_pool::WlShmPool);
impl_dispatch_log!(wl_shm::WlShm);
impl_dispatch_log!(wl_surface::WlSurface);
impl_dispatch_log!(xdg_wm_base::XdgWmBase);
impl_dispatch_log!(zwlr_layer_shell_v1::ZwlrLayerShellV1);