smithay/examples/udev.rs

655 lines
26 KiB
Rust

extern crate drm;
#[macro_use]
extern crate glium;
extern crate image;
extern crate input as libinput;
extern crate rand;
#[macro_use(define_roles)]
extern crate smithay;
extern crate udev;
extern crate wayland_server;
extern crate xkbcommon;
#[macro_use]
extern crate slog;
extern crate slog_async;
extern crate slog_term;
mod helpers;
use drm::control::{Device as ControlDevice, ResourceInfo};
use drm::control::connector::{Info as ConnectorInfo, State as ConnectorState};
use drm::control::crtc;
use drm::control::encoder::Info as EncoderInfo;
use drm::result::Error as DrmError;
use glium::{Blend, Surface};
use helpers::{init_shell, Buffer, GliumDrawer, MyWindowMap, Roles, SurfaceData};
use image::{ImageBuffer, Rgba};
use libinput::{event, Device as LibinputDevice, Libinput};
use libinput::event::keyboard::KeyboardEventTrait;
use slog::{Drain, Logger};
use smithay::backend::drm::{DevPath, DrmBackend, DrmDevice, DrmHandler};
use smithay::backend::graphics::GraphicsBackend;
use smithay::backend::graphics::egl::EGLGraphicsBackend;
use smithay::backend::graphics::egl::wayland::{EGLDisplay, EGLWaylandExtensions, Format};
use smithay::backend::input::{self, Event, InputBackend, InputHandler, KeyState, KeyboardKeyEvent,
PointerAxisEvent, PointerButtonEvent};
use smithay::backend::libinput::{libinput_bind, LibinputInputBackend, LibinputSessionInterface};
use smithay::backend::session::{Session, SessionNotifier};
use smithay::backend::session::auto::{auto_session_bind, AutoSession};
use smithay::backend::udev::{primary_gpu, udev_backend_bind, SessionFdDrmDevice, UdevBackend, UdevHandler};
use smithay::wayland::compositor::{CompositorToken, SubsurfaceRole, TraversalAction};
use smithay::wayland::compositor::roles::Role;
use smithay::wayland::output::{Mode, Output, PhysicalProperties};
use smithay::wayland::seat::{KeyboardHandle, PointerHandle, Seat};
use smithay::wayland::shm::init_shm_global;
use std::cell::RefCell;
use std::collections::HashMap;
use std::env;
use std::io::Error as IoError;
use std::path::PathBuf;
use std::process::Command;
use std::rc::Rc;
use std::sync::Arc;
use std::sync::atomic::{AtomicBool, Ordering};
use std::time::Duration;
use wayland_server::Display;
use wayland_server::commons::downcast_impl;
use wayland_server::protocol::{wl_output, wl_pointer};
use xkbcommon::xkb::keysyms as xkb;
struct LibinputInputHandler {
log: Logger,
pointer: PointerHandle,
keyboard: KeyboardHandle,
window_map: Rc<RefCell<MyWindowMap>>,
pointer_location: Rc<RefCell<(f64, f64)>>,
screen_size: (u32, u32),
serial: u32,
session: AutoSession,
running: Arc<AtomicBool>,
}
impl LibinputInputHandler {
fn next_serial(&mut self) -> u32 {
self.serial += 1;
self.serial
}
}
impl InputHandler<LibinputInputBackend> for LibinputInputHandler {
fn on_seat_created(&mut self, _: &input::Seat) {
/* we just create a single static one */
}
fn on_seat_destroyed(&mut self, _: &input::Seat) {
/* we just create a single static one */
}
fn on_seat_changed(&mut self, _: &input::Seat) {
/* we just create a single static one */
}
fn on_keyboard_key(&mut self, _: &input::Seat, evt: event::keyboard::KeyboardKeyEvent) {
let keycode = evt.key();
let state = evt.state();
debug!(self.log, "key"; "keycode" => keycode, "state" => format!("{:?}", state));
let serial = self.next_serial();
// we cannot borrow `self` into the closure, because we need self.keyboard.
// but rust does not borrow all fields separately, so we need to do that manually...
let running = &self.running;
let mut session = &mut self.session;
let log = &self.log;
let time = Event::time(&evt);
self.keyboard
.input(keycode, state, serial, time, move |modifiers, keysym| {
debug!(log, "keysym"; "state" => format!("{:?}", state), "mods" => format!("{:?}", modifiers), "keysym" => xkbcommon::xkb::keysym_get_name(keysym));
if modifiers.ctrl && modifiers.alt && keysym == xkb::KEY_BackSpace
&& state == KeyState::Pressed
{
info!(log, "Stopping example using Ctrl+Alt+Backspace");
running.store(false, Ordering::SeqCst);
false
} else if modifiers.logo && keysym == xkb::KEY_q {
info!(log, "Stopping example using Logo+Q");
running.store(false, Ordering::SeqCst);
false
} else if modifiers.ctrl && modifiers.alt && keysym >= xkb::KEY_XF86Switch_VT_1
&& keysym <= xkb::KEY_XF86Switch_VT_12
&& state == KeyState::Pressed
{
let vt = (keysym - xkb::KEY_XF86Switch_VT_1 + 1) as i32;
info!(log, "Trying to switch to vt {}", vt);
if let Err(err) = session.change_vt(vt) {
error!(log, "Error switching to vt {}: {}", vt, err);
}
false
} else if modifiers.logo && keysym == xkb::KEY_Return && state == KeyState::Pressed {
info!(log, "Launching terminal");
let _ = Command::new("weston-terminal").spawn();
false
} else {
true
}
});
}
fn on_pointer_move(&mut self, _: &input::Seat, evt: event::pointer::PointerMotionEvent) {
let (x, y) = (evt.dx(), evt.dy());
let serial = self.next_serial();
let mut location = self.pointer_location.borrow_mut();
location.0 += x;
location.1 += y;
let under = self.window_map
.borrow()
.get_surface_under((location.0, location.1));
self.pointer.motion(
under.as_ref().map(|&(ref s, (x, y))| (s, x, y)),
serial,
evt.time(),
);
}
fn on_pointer_move_absolute(&mut self, _: &input::Seat, evt: event::pointer::PointerMotionAbsoluteEvent) {
let (x, y) = (
evt.absolute_x_transformed(self.screen_size.0),
evt.absolute_y_transformed(self.screen_size.1),
);
*self.pointer_location.borrow_mut() = (x, y);
let serial = self.next_serial();
let under = self.window_map.borrow().get_surface_under((x, y));
self.pointer.motion(
under.as_ref().map(|&(ref s, (x, y))| (s, x, y)),
serial,
evt.time(),
);
}
fn on_pointer_button(&mut self, _: &input::Seat, evt: event::pointer::PointerButtonEvent) {
let serial = self.next_serial();
let button = evt.button();
let state = match evt.state() {
input::MouseButtonState::Pressed => {
// change the keyboard focus
let under = self.window_map
.borrow_mut()
.get_surface_and_bring_to_top(*self.pointer_location.borrow());
self.keyboard
.set_focus(under.as_ref().map(|&(ref s, _)| s), serial);
wl_pointer::ButtonState::Pressed
}
input::MouseButtonState::Released => wl_pointer::ButtonState::Released,
};
self.pointer.button(button, state, serial, evt.time());
}
fn on_pointer_axis(&mut self, _: &input::Seat, evt: event::pointer::PointerAxisEvent) {
let source = match evt.source() {
input::AxisSource::Continuous => wayland_server::protocol::wl_pointer::AxisSource::Continuous,
input::AxisSource::Finger => wayland_server::protocol::wl_pointer::AxisSource::Finger,
input::AxisSource::Wheel | input::AxisSource::WheelTilt => {
wayland_server::protocol::wl_pointer::AxisSource::Wheel
}
};
let horizontal_amount = evt.amount(&input::Axis::Horizontal)
.unwrap_or_else(|| evt.amount_discrete(&input::Axis::Horizontal).unwrap() * 3.0);
let vertical_amount = evt.amount(&input::Axis::Vertical)
.unwrap_or_else(|| evt.amount_discrete(&input::Axis::Vertical).unwrap() * 3.0);
let horizontal_amount_discrete = evt.amount_discrete(&input::Axis::Horizontal);
let vertical_amount_discrete = evt.amount_discrete(&input::Axis::Vertical);
{
let mut event = self.pointer.axis();
event.source(source);
if horizontal_amount != 0.0 {
event.value(
wayland_server::protocol::wl_pointer::Axis::HorizontalScroll,
horizontal_amount,
evt.time(),
);
if let Some(discrete) = horizontal_amount_discrete {
event.discrete(
wayland_server::protocol::wl_pointer::Axis::HorizontalScroll,
discrete as i32,
);
}
} else if source == wayland_server::protocol::wl_pointer::AxisSource::Finger {
event.stop(
wayland_server::protocol::wl_pointer::Axis::HorizontalScroll,
evt.time(),
);
}
if vertical_amount != 0.0 {
event.value(
wayland_server::protocol::wl_pointer::Axis::VerticalScroll,
vertical_amount,
evt.time(),
);
if let Some(discrete) = vertical_amount_discrete {
event.discrete(
wayland_server::protocol::wl_pointer::Axis::VerticalScroll,
discrete as i32,
);
}
} else if source == wayland_server::protocol::wl_pointer::AxisSource::Finger {
event.stop(
wayland_server::protocol::wl_pointer::Axis::VerticalScroll,
evt.time(),
);
}
event.done();
}
}
fn on_touch_down(&mut self, _: &input::Seat, _: event::touch::TouchDownEvent) {
/* not done in this example */
}
fn on_touch_motion(&mut self, _: &input::Seat, _: event::touch::TouchMotionEvent) {
/* not done in this example */
}
fn on_touch_up(&mut self, _: &input::Seat, _: event::touch::TouchUpEvent) {
/* not done in this example */
}
fn on_touch_cancel(&mut self, _: &input::Seat, _: event::touch::TouchCancelEvent) {
/* not done in this example */
}
fn on_touch_frame(&mut self, _: &input::Seat, _: event::touch::TouchFrameEvent) {
/* not done in this example */
}
fn on_input_config_changed(&mut self, _: &mut [LibinputDevice]) {
/* not done in this example */
}
}
fn main() {
let active_egl_context = Rc::new(RefCell::new(None));
// A logger facility, here we use the terminal for this example
let log = Logger::root(
slog_term::FullFormat::new(slog_term::PlainSyncDecorator::new(std::io::stdout()))
.build()
.fuse(),
o!(),
);
// Initialize the wayland server
let (mut display, mut event_loop) = wayland_server::Display::new();
/*
* Add a listening socket
*/
let name = display.add_socket_auto().unwrap().into_string().unwrap();
println!("Listening on socket: {}", name);
env::set_var("WAYLAND_DISPLAY", name);
let display = Rc::new(RefCell::new(display));
/*
* Initialize the compositor
*/
init_shm_global(
&mut display.borrow_mut(),
event_loop.token(),
vec![],
log.clone(),
);
let (compositor_token, _, _, window_map) = init_shell(
&mut display.borrow_mut(),
event_loop.token(),
log.clone(),
active_egl_context.clone(),
);
/*
* Initialize session
*/
let (session, mut notifier) = AutoSession::new(log.clone()).unwrap();
let running = Arc::new(AtomicBool::new(true));
let pointer_location = Rc::new(RefCell::new((0.0, 0.0)));
/*
* Initialize the udev backend
*/
let context = udev::Context::new().unwrap();
let seat = session.seat();
let primary_gpu = primary_gpu(&context, &seat).unwrap_or_default();
let bytes = include_bytes!("resources/cursor2.rgba");
let mut udev_backend = UdevBackend::new(
event_loop.token(),
&context,
session.clone(),
UdevHandlerImpl {
compositor_token,
active_egl_context,
backends: HashMap::new(),
display: display.clone(),
primary_gpu,
window_map: window_map.clone(),
pointer_location: pointer_location.clone(),
pointer_image: ImageBuffer::from_raw(64, 64, bytes.to_vec()).unwrap(),
logger: log.clone(),
},
log.clone(),
).unwrap();
let udev_session_id = notifier.register(&mut udev_backend);
let (mut w_seat, _) = Seat::new(
&mut display.borrow_mut(),
event_loop.token(),
session.seat().into(),
log.clone(),
);
let pointer = w_seat.add_pointer();
let keyboard = w_seat
.add_keyboard("", "", "", None, 1000, 500)
.expect("Failed to initialize the keyboard");
let (output, _output_global) = Output::new(
&mut display.borrow_mut(),
event_loop.token(),
"Drm".into(),
PhysicalProperties {
width: 0,
height: 0,
subpixel: wl_output::Subpixel::Unknown,
maker: "Smithay".into(),
model: "Generic DRM".into(),
},
log.clone(),
);
let (w, h) = (1920, 1080); // Hardcode full-hd res
output.change_current_state(
Some(Mode {
width: w as i32,
height: h as i32,
refresh: 60_000,
}),
None,
None,
);
output.set_preferred(Mode {
width: w as i32,
height: h as i32,
refresh: 60_000,
});
/*
* Initialize libinput backend
*/
let mut libinput_context =
Libinput::new_from_udev::<LibinputSessionInterface<AutoSession>>(session.clone().into(), &context);
let libinput_session_id = notifier.register(&mut libinput_context);
libinput_context.udev_assign_seat(&seat).unwrap();
let mut libinput_backend = LibinputInputBackend::new(libinput_context, log.clone());
libinput_backend.set_handler(LibinputInputHandler {
log: log.clone(),
pointer,
keyboard,
window_map: window_map.clone(),
pointer_location,
screen_size: (w, h),
serial: 0,
session: session,
running: running.clone(),
});
let libinput_event_source = libinput_bind(libinput_backend, event_loop.token())
.map_err(|(err, _)| err)
.unwrap();
let session_event_source = auto_session_bind(notifier, &event_loop.token())
.map_err(|(err, _)| err)
.unwrap();
let udev_event_source = udev_backend_bind(&event_loop.token(), udev_backend)
.map_err(|(err, _)| err)
.unwrap();
while running.load(Ordering::SeqCst) {
if let Err(_) = event_loop.dispatch(Some(16)) {
running.store(false, Ordering::SeqCst);
} else {
display.borrow_mut().flush_clients();
window_map.borrow_mut().refresh();
}
}
println!("Bye Bye");
let mut notifier = session_event_source.unbind();
notifier.unregister(udev_session_id);
notifier.unregister(libinput_session_id);
libinput_event_source.remove();
// destroy the udev backend freeing the drm devices
//
// udev_event_source.remove() returns a Box<Implementation<..>>, downcast_impl
// allows us to cast it back to its original type, storing it back into its original
// variable to simplify type inference.
udev_backend = *(downcast_impl(udev_event_source.remove()).unwrap_or_else(|_| unreachable!()));
udev_backend.close();
}
struct UdevHandlerImpl {
compositor_token: CompositorToken<SurfaceData, Roles>,
active_egl_context: Rc<RefCell<Option<EGLDisplay>>>,
backends: HashMap<u64, Rc<RefCell<HashMap<crtc::Handle, GliumDrawer<DrmBackend<SessionFdDrmDevice>>>>>>,
display: Rc<RefCell<Display>>,
primary_gpu: Option<PathBuf>,
window_map: Rc<RefCell<MyWindowMap>>,
pointer_location: Rc<RefCell<(f64, f64)>>,
pointer_image: ImageBuffer<Rgba<u8>, Vec<u8>>,
logger: ::slog::Logger,
}
impl UdevHandlerImpl {
pub fn scan_connectors(
&self,
device: &mut DrmDevice<SessionFdDrmDevice>,
) -> HashMap<crtc::Handle, GliumDrawer<DrmBackend<SessionFdDrmDevice>>> {
// Get a set of all modesetting resource handles (excluding planes):
let res_handles = device.resource_handles().unwrap();
// Use first connected connector
let connector_infos: Vec<ConnectorInfo> = res_handles
.connectors()
.iter()
.map(|conn| ConnectorInfo::load_from_device(device, *conn).unwrap())
.filter(|conn| conn.connection_state() == ConnectorState::Connected)
.inspect(|conn| info!(self.logger, "Connected: {:?}", conn.connector_type()))
.collect();
let mut backends = HashMap::new();
// very naive way of finding good crtc/encoder/connector combinations. This problem is np-complete
for connector_info in connector_infos {
let encoder_infos = connector_info
.encoders()
.iter()
.flat_map(|encoder_handle| EncoderInfo::load_from_device(device, *encoder_handle))
.collect::<Vec<EncoderInfo>>();
for encoder_info in encoder_infos {
for crtc in res_handles.filter_crtcs(encoder_info.possible_crtcs()) {
if !backends.contains_key(&crtc) {
let mode = connector_info.modes()[0]; // Use first mode (usually highest resoltion, but in reality you should filter and sort and check and match with other connectors, if you use more then one.)
// create a backend
let renderer = GliumDrawer::from(
device
.create_backend(crtc, mode, vec![connector_info.handle()])
.unwrap(),
);
// create cursor
renderer
.borrow()
.set_cursor_representation(&self.pointer_image, (2, 2))
.unwrap();
// render first frame
{
let mut frame = renderer.draw();
frame.clear_color(0.8, 0.8, 0.9, 1.0);
frame.finish().unwrap();
}
backends.insert(crtc, renderer);
break;
}
}
}
}
backends
}
}
impl UdevHandler<DrmHandlerImpl> for UdevHandlerImpl {
fn device_added(&mut self, device: &mut DrmDevice<SessionFdDrmDevice>) -> Option<DrmHandlerImpl> {
// init hardware acceleration on the primary gpu.
if device.dev_path().and_then(|path| path.canonicalize().ok()) == self.primary_gpu {
*self.active_egl_context.borrow_mut() = device.bind_wl_display(&*self.display.borrow()).ok();
}
let backends = Rc::new(RefCell::new(self.scan_connectors(device)));
self.backends.insert(device.device_id(), backends.clone());
Some(DrmHandlerImpl {
compositor_token: self.compositor_token.clone(),
backends,
window_map: self.window_map.clone(),
pointer_location: self.pointer_location.clone(),
logger: self.logger.clone(),
})
}
fn device_changed(&mut self, device: &mut DrmDevice<SessionFdDrmDevice>) {
//quick and dirt, just re-init all backends
let backends = self.backends.get(&device.device_id()).unwrap();
*backends.borrow_mut() = self.scan_connectors(device);
}
fn device_removed(&mut self, device: &mut DrmDevice<SessionFdDrmDevice>) {
// drop the backends on this side
self.backends.remove(&device.device_id());
// don't use hardware acceleration anymore, if this was the primary gpu
if device.dev_path().and_then(|path| path.canonicalize().ok()) == self.primary_gpu {
*self.active_egl_context.borrow_mut() = None;
}
}
fn error(&mut self, error: IoError) {
error!(self.logger, "{:?}", error);
}
}
pub struct DrmHandlerImpl {
compositor_token: CompositorToken<SurfaceData, Roles>,
backends: Rc<RefCell<HashMap<crtc::Handle, GliumDrawer<DrmBackend<SessionFdDrmDevice>>>>>,
window_map: Rc<RefCell<MyWindowMap>>,
pointer_location: Rc<RefCell<(f64, f64)>>,
logger: ::slog::Logger,
}
impl DrmHandler<SessionFdDrmDevice> for DrmHandlerImpl {
fn ready(
&mut self,
_device: &mut DrmDevice<SessionFdDrmDevice>,
crtc: crtc::Handle,
_frame: u32,
_duration: Duration,
) {
if let Some(drawer) = self.backends.borrow().get(&crtc) {
{
let (x, y) = *self.pointer_location.borrow();
let _ = drawer
.borrow()
.set_cursor_position(x.trunc().abs() as u32, y.trunc().abs() as u32);
}
let mut frame = drawer.draw();
frame.clear_color(0.8, 0.8, 0.9, 1.0);
// redraw the frame, in a simple but inneficient way
{
let screen_dimensions = drawer.borrow().get_framebuffer_dimensions();
self.window_map.borrow().with_windows_from_bottom_to_top(
|toplevel_surface, initial_place| {
if let Some(wl_surface) = toplevel_surface.get_surface() {
// this surface is a root of a subsurface tree that needs to be drawn
self.compositor_token
.with_surface_tree_upward(
wl_surface,
initial_place,
|_surface, attributes, role, &(mut x, mut y)| {
// there is actually something to draw !
if attributes.user_data.texture.is_none() {
let mut remove = false;
match attributes.user_data.buffer {
Some(Buffer::Egl { ref images }) => {
match images.format {
Format::RGB | Format::RGBA => {
attributes.user_data.texture =
drawer.texture_from_egl(&images);
}
_ => {
// we don't handle the more complex formats here.
attributes.user_data.texture = None;
remove = true;
}
};
}
Some(Buffer::Shm { ref data, ref size }) => {
attributes.user_data.texture =
Some(drawer.texture_from_mem(data, *size));
}
_ => {}
}
if remove {
attributes.user_data.buffer = None;
}
}
if let Some(ref texture) = attributes.user_data.texture {
if let Ok(subdata) = Role::<SubsurfaceRole>::data(role) {
x += subdata.location.0;
y += subdata.location.1;
}
info!(self.logger, "Render window");
drawer.render_texture(
&mut frame,
texture,
match *attributes.user_data.buffer.as_ref().unwrap() {
Buffer::Egl { ref images } => images.y_inverted,
Buffer::Shm { .. } => false,
},
match *attributes.user_data.buffer.as_ref().unwrap() {
Buffer::Egl { ref images } => {
(images.width, images.height)
}
Buffer::Shm { ref size, .. } => *size,
},
(x, y),
screen_dimensions,
Blend::alpha_blending(),
);
TraversalAction::DoChildren((x, y))
} else {
// we are not display, so our children are neither
TraversalAction::SkipChildren
}
},
)
.unwrap();
}
},
);
}
if let Err(err) = frame.finish() {
error!(self.logger, "Error during rendering: {:?}", err);
}
}
}
fn error(&mut self, _device: &mut DrmDevice<SessionFdDrmDevice>, error: DrmError) {
error!(self.logger, "{:?}", error);
}
}