smithay/examples/drm.rs

361 lines
14 KiB
Rust

extern crate drm;
#[macro_use]
extern crate glium;
extern crate rand;
#[macro_use(define_roles)]
extern crate smithay;
extern crate wayland_protocols;
extern crate wayland_server;
#[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::encoder::Info as EncoderInfo;
use glium::Surface;
use helpers::GliumDrawer;
use slog::*;
use smithay::backend::drm::{DrmBackend, DrmDevice, DrmHandler, Id};
use smithay::backend::graphics::egl::EGLGraphicsBackend;
use smithay::backend::graphics::glium::{GliumGraphicsBackend, IntoGlium};
use smithay::compositor::{self, CompositorHandler, CompositorToken, SubsurfaceRole, TraversalAction};
use smithay::compositor::roles::Role;
use smithay::shell::{self, PopupConfigure, PopupSurface, ShellClient, ShellHandler, ShellSurfaceRole,
ToplevelConfigure, ToplevelSurface};
use smithay::shm::{ShmGlobal, ShmToken};
use std::fs::OpenOptions;
use std::io::Error as IoError;
use std::os::unix::io::AsRawFd;
use std::time::Duration;
use wayland_protocols::unstable::xdg_shell::server::{zxdg_shell_v6, zxdg_toplevel_v6};
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};
use wayland_server::sources::READ;
define_roles!(Roles => [ ShellSurface, ShellSurfaceRole ] );
struct SurfaceHandler {
shm_token: ShmToken,
}
#[derive(Default)]
struct SurfaceData {
buffer: Option<(Vec<u8>, (u32, u32))>,
location: Option<(i32, i32)>,
}
impl compositor::Handler<SurfaceData, Roles> for SurfaceHandler {
fn commit(&mut self, _evlh: &mut EventLoopHandle, _client: &Client, surface: &wl_surface::WlSurface,
token: CompositorToken<SurfaceData, Roles, SurfaceHandler>) {
// we retrieve the contents of the associated buffer and copy it
token.with_surface_data(surface, |attributes| {
match attributes.buffer.take() {
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();
}
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);
}
}
struct ShellSurfaceHandler {
token: CompositorToken<SurfaceData, Roles, SurfaceHandler>,
}
impl ShellSurfaceHandler {
fn new(token: CompositorToken<SurfaceData, Roles, SurfaceHandler>) -> ShellSurfaceHandler {
ShellSurfaceHandler { token }
}
}
impl shell::Handler<SurfaceData, Roles, SurfaceHandler, ()> for ShellSurfaceHandler {
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,
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))
});
ToplevelConfigure {
size: None,
states: vec![],
serial: 42,
}
}
fn new_popup(&mut self, _evlh: &mut EventLoopHandle,
_surface: PopupSurface<SurfaceData, Roles, SurfaceHandler, ()>)
-> PopupConfigure {
PopupConfigure {
size: (10, 10),
position: (10, 10),
serial: 42,
}
}
fn move_(&mut self, _evlh: &mut EventLoopHandle,
_surface: ToplevelSurface<SurfaceData, Roles, SurfaceHandler, ()>, _seat: &wl_seat::WlSeat,
_serial: u32) {
}
fn resize(&mut self, _evlh: &mut EventLoopHandle,
_surface: ToplevelSurface<SurfaceData, Roles, SurfaceHandler, ()>, _seat: &wl_seat::WlSeat,
_serial: u32, _edges: zxdg_toplevel_v6::ResizeEdge) {
}
fn grab(&mut self, _evlh: &mut EventLoopHandle,
_surface: PopupSurface<SurfaceData, Roles, SurfaceHandler, ()>, _seat: &wl_seat::WlSeat,
_serial: u32) {
}
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>)
-> ToplevelConfigure {
ToplevelConfigure {
size: None,
states: vec![],
serial: 42,
}
}
fn show_window_menu(&mut self, _evlh: &mut EventLoopHandle,
_surface: ToplevelSurface<SurfaceData, Roles, SurfaceHandler, ()>,
_seat: &wl_seat::WlSeat, _serial: u32, _x: i32, _y: i32) {
}
}
type MyCompositorHandler = CompositorHandler<SurfaceData, Roles, SurfaceHandler>;
type MyShellHandler = ShellHandler<SurfaceData, Roles, SurfaceHandler, ShellSurfaceHandler, ()>;
fn main() {
// A logger facility, here we use the terminal for this example
let log = Logger::root(
slog_async::Async::default(slog_term::term_full().fuse()).fuse(),
o!(),
);
// Initialize the wayland server
let (mut display, mut event_loop) = wayland_server::create_display();
/*
* Initialize the drm backend
*/
// "Find" a suitable drm device
let mut options = OpenOptions::new();
options.read(true);
options.write(true);
let mut device =
DrmDevice::new_from_file(options.clone().open("/dev/dri/card0").unwrap(), log.clone()).unwrap();
// Get a set of all modesetting resource handles (excluding planes):
let res_handles = device.resource_handles().unwrap();
// Use first connected connector
let connector_info = res_handles
.connectors()
.iter()
.map(|conn| {
ConnectorInfo::load_from_device(&device, *conn).unwrap()
})
.find(|conn| conn.connection_state() == ConnectorState::Connected)
.unwrap();
// Use the first encoder
let encoder_info = EncoderInfo::load_from_device(&device, connector_info.encoders()[0]).unwrap();
// use the connected crtc if any
let crtc = encoder_info.current_crtc()
// or use the first one that is compatible with the encoder
.unwrap_or_else(||
*res_handles.crtcs()
.iter()
.find(|crtc| encoder_info.supports_crtc(**crtc))
.unwrap());
// Assuming we found a good connector and loaded the info into `connector_info`
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.)
// Initialize the hardware backend
let renderer = device
.create_backend(crtc, mode, vec![connector_info.handle()])
.unwrap();
/*
* Initialize wl_shm global
*/
// Insert the ShmGlobal as a handler to your event loop
// Here, we specify tha the standard Argb8888 and Xrgb8888 is the only supported.
let shm_handler_id = event_loop.add_handler_with_init(ShmGlobal::new(vec![], log.clone()));
// Register this handler to advertise a wl_shm global of version 1
event_loop.register_global::<wl_shm::WlShm, ShmGlobal>(shm_handler_id, 1);
// retreive the token
let shm_token = {
let state = event_loop.state();
state.get_handler::<ShmGlobal>(shm_handler_id).get_token()
};
/*
* Initialize the compositor global
*/
let compositor_handler_id = event_loop.add_handler_with_init(MyCompositorHandler::new(
SurfaceHandler {
shm_token: shm_token.clone(),
},
log.clone(),
));
// register it to handle wl_compositor and wl_subcompositor
event_loop.register_global::<wl_compositor::WlCompositor, MyCompositorHandler>(compositor_handler_id, 4);
event_loop
.register_global::<wl_subcompositor::WlSubcompositor, MyCompositorHandler>(compositor_handler_id, 1);
// retrieve the tokens
let compositor_token = {
let state = event_loop.state();
state
.get_handler::<MyCompositorHandler>(compositor_handler_id)
.get_token()
};
/*
* Initialize the shell global
*/
let shell_handler_id = event_loop.add_handler_with_init(MyShellHandler::new(
ShellSurfaceHandler::new(compositor_token),
compositor_token,
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);
/*
* Initialize glium
*/
let drawer = GliumDrawer::new(renderer.into_glium());
let mut frame = drawer.draw();
frame.clear_color(0.8, 0.8, 0.9, 1.0);
frame.finish().unwrap();
/*
* Add a listening socket:
*/
let name = display.add_socket_auto().unwrap().into_string().unwrap();
println!("Listening on socket: {}", name);
// Set the DrmHandler
device.set_handler(DrmHandlerImpl {
drawer: drawer,
shell_handler_id,
compositor_token,
logger: log,
});
/*
* Register the DrmDevice on the EventLoop
*/
let fd = device.as_raw_fd();
let drm_device_id = event_loop.add_handler(device);
let _drm_event_source =
event_loop.add_fd_event_source::<DrmDevice<DrmHandlerImpl>>(fd, drm_device_id, READ);
event_loop.run().unwrap();
}
pub struct DrmHandlerImpl {
drawer: GliumDrawer<GliumGraphicsBackend<DrmBackend>>,
shell_handler_id: usize,
compositor_token: CompositorToken<SurfaceData, Roles, SurfaceHandler>,
logger: ::slog::Logger,
}
impl DrmHandler for DrmHandlerImpl {
fn ready(&mut self, evlh: &mut EventLoopHandle, _id: Id, _frame: u32, _duration: Duration) {
let mut frame = self.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 = self.drawer.get_framebuffer_dimensions();
for toplevel_surface in unsafe {
evlh.get_handler_unchecked::<MyShellHandler>(self.shell_handler_id)
.toplevel_surfaces()
} {
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 = self.compositor_token
.with_surface_data(wl_surface, |data| data.user_data.location.unwrap_or((0, 0)));
self.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;
}
self.drawer.render(
&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
}
},
)
.unwrap();
}
}
}
frame.finish().unwrap();
}
fn error(&mut self, _evlh: &mut EventLoopHandle, error: IoError) {
panic!("{:?}", error);
}
}