smithay/examples/drm.rs

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Rust
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extern crate drm;
#[macro_use]
extern crate glium;
extern crate rand;
#[macro_use(define_roles)]
extern crate smithay;
extern crate wayland_server;
#[macro_use]
extern crate slog;
extern crate slog_async;
extern crate slog_term;
mod helpers;
use drm::Device as BasicDevice;
use drm::control::{Device as ControlDevice, ResourceInfo};
use drm::control::connector::{Info as ConnectorInfo, State as ConnectorState};
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use drm::control::crtc;
use drm::control::encoder::Info as EncoderInfo;
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use drm::result::Error as DrmError;
use glium::{Blend, Surface};
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use helpers::{init_shell, Buffer, GliumDrawer, MyWindowMap, Roles, SurfaceData};
use slog::{Drain, Logger};
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use smithay::backend::drm::{drm_device_bind, DrmBackend, DrmDevice, DrmHandler};
use smithay::backend::graphics::egl::EGLGraphicsBackend;
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use smithay::backend::graphics::egl::wayland::{EGLDisplay, EGLWaylandExtensions, Format};
use smithay::wayland::compositor::{CompositorToken, SubsurfaceRole, TraversalAction};
use smithay::wayland::compositor::roles::Role;
use smithay::wayland::shm::init_shm_global;
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use std::cell::RefCell;
use std::fs::{File, OpenOptions};
use std::os::unix::io::AsRawFd;
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use std::os::unix::io::RawFd;
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use std::rc::Rc;
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use std::time::Duration;
#[derive(Debug)]
pub struct Card(File);
impl AsRawFd for Card {
fn as_raw_fd(&self) -> RawFd {
self.0.as_raw_fd()
}
}
impl BasicDevice for Card {}
impl ControlDevice for Card {}
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
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let (mut display, mut event_loop) = wayland_server::Display::new();
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/*
* Initialize the drm backend
*/
// "Find" a suitable drm device
let mut options = OpenOptions::new();
options.read(true);
options.write(true);
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let mut device = DrmDevice::new(
Card(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()
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.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(||
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*res_handles.filter_crtcs(encoder_info.possible_crtcs())
.iter()
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.next()
.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
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let renderer = GliumDrawer::from(
device
.create_backend(crtc, mode, vec![connector_info.handle()])
.unwrap(),
);
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{
/*
* Initialize glium
*/
let mut frame = renderer.draw();
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frame.clear_color(0.8, 0.8, 0.9, 1.0);
frame.finish().unwrap();
}
let egl_display = Rc::new(RefCell::new(
if let Ok(egl_display) = renderer.bind_wl_display(&display) {
info!(log, "EGL hardware-acceleration enabled");
Some(egl_display)
} else {
None
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},
));
/*
* Initialize the globals
*/
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init_shm_global(&mut display, event_loop.token(), vec![], log.clone());
let (compositor_token, _, _, window_map) =
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init_shell(&mut display, event_loop.token(), log.clone(), egl_display);
/*
* Add a listening socket:
*/
let name = display.add_socket_auto().unwrap().into_string().unwrap();
println!("Listening on socket: {}", name);
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/*
* Register the DrmDevice on the EventLoop
*/
let _source = drm_device_bind(
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&event_loop.token(),
device,
DrmHandlerImpl {
compositor_token,
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window_map: window_map.clone(),
drawer: renderer,
logger: log,
},
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).map_err(|(err, _)| err)
.unwrap();
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loop {
event_loop.dispatch(Some(16)).unwrap();
display.flush_clients();
window_map.borrow_mut().refresh();
}
}
pub struct DrmHandlerImpl {
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compositor_token: CompositorToken<SurfaceData, Roles>,
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window_map: Rc<RefCell<MyWindowMap>>,
drawer: GliumDrawer<DrmBackend<Card>>,
logger: ::slog::Logger,
}
impl DrmHandler<Card> for DrmHandlerImpl {
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fn ready(
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&mut self,
_device: &mut DrmDevice<Card>,
_crtc: crtc::Handle,
_frame: u32,
_duration: Duration,
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) {
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.borrow().get_framebuffer_dimensions();
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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 => {
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attributes.user_data.texture =
self.drawer.texture_from_egl(&images);
}
_ => {
// we don't handle the more complex formats here.
attributes.user_data.texture = None;
remove = true;
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}
};
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}
Some(Buffer::Shm { ref data, ref size }) => {
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attributes.user_data.texture =
Some(self.drawer.texture_from_mem(data, *size));
}
_ => {}
}
if remove {
attributes.user_data.buffer = None;
}
}
if let Some(ref texture) = attributes.user_data.texture {
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if let Ok(subdata) = Role::<SubsurfaceRole>::data(role) {
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x += subdata.location.0;
y += subdata.location.1;
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}
info!(self.logger, "Render window");
self.drawer.render_texture(
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&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,
},
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(x, y),
screen_dimensions,
Blend::alpha_blending(),
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);
TraversalAction::DoChildren((x, y))
} else {
// we are not display, so our children are neither
TraversalAction::SkipChildren
}
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},
)
.unwrap();
}
});
}
frame.finish().unwrap();
}
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fn error(&mut self, _device: &mut DrmDevice<Card>, error: DrmError) {
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panic!("{:?}", error);
}
}