smithay/examples/simple.rs

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Rust
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#[macro_use]
extern crate glium;
extern crate rand;
#[macro_use]
extern crate slog;
extern crate slog_async;
extern crate slog_term;
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#[macro_use(define_roles)]
extern crate smithay;
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extern crate wayland_protocols;
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extern crate wayland_server;
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mod helpers;
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use glium::Surface;
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use helpers::GliumDrawer;
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use slog::{Drain, Logger};
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use smithay::backend::graphics::glium::IntoGlium;
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use smithay::backend::input::InputBackend;
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use smithay::backend::winit;
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use smithay::compositor::{self, CompositorHandler, CompositorToken, SubsurfaceRole, TraversalAction};
use smithay::compositor::roles::Role;
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use smithay::shell::{self, PopupConfigure, PopupSurface, ShellClient, ShellHandler, ShellSurfaceRole,
ToplevelConfigure, ToplevelSurface};
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use smithay::shm::{ShmGlobal, ShmToken};
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use wayland_protocols::unstable::xdg_shell::server::{zxdg_shell_v6, zxdg_toplevel_v6};
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use wayland_server::{Client, EventLoopHandle};
use wayland_server::protocol::{wl_callback, wl_compositor, wl_output, wl_seat, wl_shell, wl_shm,
wl_subcompositor, wl_surface};
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define_roles!(Roles => [ ShellSurface, ShellSurfaceRole ] );
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struct SurfaceHandler {
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shm_token: ShmToken,
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}
#[derive(Default)]
struct SurfaceData {
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buffer: Option<(Vec<u8>, (u32, u32))>,
location: Option<(i32, i32)>,
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}
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impl compositor::Handler<SurfaceData, Roles> for SurfaceHandler {
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fn commit(&mut self, _evlh: &mut EventLoopHandle, _client: &Client, surface: &wl_surface::WlSurface,
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token: CompositorToken<SurfaceData, Roles, SurfaceHandler>) {
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// we retrieve the contents of the associated buffer and copy it
token.with_surface_data(surface, |attributes| {
match attributes.buffer.take() {
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Some(Some((buffer, (_x, _y)))) => {
// we ignore hotspot coordinates in this simple example
self.shm_token
.with_buffer_contents(&buffer, |slice, data| {
let offset = data.offset as usize;
let stride = data.stride as usize;
let width = data.width as usize;
let height = data.height as usize;
let mut new_vec = Vec::with_capacity(width * height * 4);
for i in 0..height {
new_vec.extend(
&slice[(offset + i * stride)..(offset + i * stride + width * 4)],
);
}
attributes.user_data.buffer =
Some((new_vec, (data.width as u32, data.height as u32)));
})
.unwrap();
buffer.release();
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}
Some(None) => {
// erase the contents
attributes.user_data.buffer = None;
}
None => {}
}
});
}
fn frame(&mut self, _evlh: &mut EventLoopHandle, _client: &Client, surface: &wl_surface::WlSurface,
callback: wl_callback::WlCallback, _token: CompositorToken<SurfaceData, Roles, SurfaceHandler>) {
callback.done(0);
}
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}
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struct ShellSurfaceHandler {
token: CompositorToken<SurfaceData, Roles, SurfaceHandler>,
}
impl ShellSurfaceHandler {
fn new(token: CompositorToken<SurfaceData, Roles, SurfaceHandler>) -> ShellSurfaceHandler {
ShellSurfaceHandler { token }
}
}
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impl shell::Handler<SurfaceData, Roles, SurfaceHandler, ()> for ShellSurfaceHandler {
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fn new_client(&mut self, _evlh: &mut EventLoopHandle, _client: ShellClient<()>) {}
fn client_pong(&mut self, _evlh: &mut EventLoopHandle, _client: ShellClient<()>) {}
fn new_toplevel(&mut self, _evlh: &mut EventLoopHandle,
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surface: ToplevelSurface<SurfaceData, Roles, SurfaceHandler, ()>)
-> ToplevelConfigure {
let wl_surface = surface.get_surface().unwrap();
self.token.with_surface_data(wl_surface, |data| {
// place the window at a random location in the [0;300]x[0;300] square
use rand::distributions::{IndependentSample, Range};
let range = Range::new(0, 300);
let mut rng = rand::thread_rng();
let x = range.ind_sample(&mut rng);
let y = range.ind_sample(&mut rng);
data.user_data.location = Some((x, y))
});
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ToplevelConfigure {
size: None,
states: vec![],
serial: 42,
}
}
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fn new_popup(&mut self, _evlh: &mut EventLoopHandle,
_surface: PopupSurface<SurfaceData, Roles, SurfaceHandler, ()>)
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-> PopupConfigure {
PopupConfigure {
size: (10, 10),
position: (10, 10),
serial: 42,
}
}
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fn move_(&mut self, _evlh: &mut EventLoopHandle,
_surface: ToplevelSurface<SurfaceData, Roles, SurfaceHandler, ()>, _seat: &wl_seat::WlSeat,
_serial: u32) {
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}
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fn resize(&mut self, _evlh: &mut EventLoopHandle,
_surface: ToplevelSurface<SurfaceData, Roles, SurfaceHandler, ()>, _seat: &wl_seat::WlSeat,
_serial: u32, _edges: zxdg_toplevel_v6::ResizeEdge) {
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}
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fn grab(&mut self, _evlh: &mut EventLoopHandle,
_surface: PopupSurface<SurfaceData, Roles, SurfaceHandler, ()>, _seat: &wl_seat::WlSeat,
_serial: u32) {
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}
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fn change_display_state(&mut self, _evlh: &mut EventLoopHandle,
_surface: ToplevelSurface<SurfaceData, Roles, SurfaceHandler, ()>,
_maximized: Option<bool>, _minimized: Option<bool>, _fullscreen: Option<bool>,
_output: Option<&wl_output::WlOutput>)
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-> ToplevelConfigure {
ToplevelConfigure {
size: None,
states: vec![],
serial: 42,
}
}
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fn show_window_menu(&mut self, _evlh: &mut EventLoopHandle,
_surface: ToplevelSurface<SurfaceData, Roles, SurfaceHandler, ()>,
_seat: &wl_seat::WlSeat, _serial: u32, _x: i32, _y: i32) {
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}
}
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type MyCompositorHandler = CompositorHandler<SurfaceData, Roles, SurfaceHandler>;
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type MyShellHandler = ShellHandler<SurfaceData, Roles, SurfaceHandler, ShellSurfaceHandler, ()>;
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fn main() {
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// A logger facility, here we use the terminal for this example
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let log = Logger::root(
slog_async::Async::default(slog_term::term_full().fuse()).fuse(),
o!(),
);
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// Initialize a simple backend for testing
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let (renderer, mut input) = winit::init(log.clone()).unwrap();
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let (mut display, mut event_loop) = wayland_server::create_display();
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/*
* Initialize wl_shm global
*/
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// Insert the ShmGlobal as a handler to your event loop
// Here, we specify tha the standard Argb8888 and Xrgb8888 is the only supported.
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let shm_handler_id = event_loop.add_handler_with_init(ShmGlobal::new(vec![], log.clone()));
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// Register this handler to advertise a wl_shm global of version 1
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event_loop.register_global::<wl_shm::WlShm, ShmGlobal>(shm_handler_id, 1);
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// retreive the token
let shm_token = {
let state = event_loop.state();
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state.get_handler::<ShmGlobal>(shm_handler_id).get_token()
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};
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/*
* Initialize the compositor global
*/
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let compositor_handler_id = event_loop.add_handler_with_init(MyCompositorHandler::new(
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SurfaceHandler {
shm_token: shm_token.clone(),
},
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log.clone(),
));
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// register it to handle wl_compositor and wl_subcompositor
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event_loop.register_global::<wl_compositor::WlCompositor, MyCompositorHandler>(compositor_handler_id, 4);
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event_loop
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.register_global::<wl_subcompositor::WlSubcompositor, MyCompositorHandler>(compositor_handler_id, 1);
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// retrieve the tokens
let compositor_token = {
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let state = event_loop.state();
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state
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.get_handler::<MyCompositorHandler>(compositor_handler_id)
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.get_token()
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};
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/*
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* Initialize the shell global
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*/
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let shell_handler_id = event_loop.add_handler_with_init(MyShellHandler::new(
ShellSurfaceHandler::new(compositor_token),
compositor_token,
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log.clone(),
));
event_loop.register_global::<wl_shell::WlShell, MyShellHandler>(shell_handler_id, 1);
event_loop.register_global::<zxdg_shell_v6::ZxdgShellV6, MyShellHandler>(shell_handler_id, 1);
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/*
* Initialize glium
*/
let context = renderer.into_glium();
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let drawer = GliumDrawer::new(&context);
/*
* Add a listening socket:
*/
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let name = display.add_socket_auto().unwrap().into_string().unwrap();
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println!("Listening on socket: {}", name);
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loop {
input.dispatch_new_events().unwrap();
let mut frame = context.draw();
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frame.clear(None, Some((0.8, 0.8, 0.9, 1.0)), false, None, None);
// redraw the frame, in a simple but inneficient way
{
let screen_dimensions = context.get_framebuffer_dimensions();
let state = event_loop.state();
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for toplevel_surface in state
.get_handler::<MyShellHandler>(shell_handler_id)
.toplevel_surfaces()
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{
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if let Some(wl_surface) = toplevel_surface.get_surface() {
// this surface is a root of a subsurface tree that needs to be drawn
let initial_place = compositor_token
.with_surface_data(wl_surface, |data| data.user_data.location.unwrap_or((0, 0)));
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compositor_token
.with_surface_tree(
wl_surface,
initial_place,
|_surface, attributes, role, &(mut x, mut y)| {
if let Some((ref contents, (w, h))) = attributes.user_data.buffer {
// there is actually something to draw !
if let Ok(subdata) = Role::<SubsurfaceRole>::data(role) {
x += subdata.x;
y += subdata.y;
}
drawer.draw(&mut frame, contents, (w, h), (x, y), screen_dimensions);
TraversalAction::DoChildren((x, y))
} else {
// we are not display, so our children are neither
TraversalAction::SkipChildren
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}
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},
)
.unwrap();
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}
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}
}
frame.finish().unwrap();
event_loop.dispatch(Some(16)).unwrap();
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display.flush_clients();
}
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}