smithay/examples/helpers/implementations.rs

145 lines
4.9 KiB
Rust

use super::WindowMap;
use rand;
use smithay::compositor::{compositor_init, CompositorToken, SurfaceAttributes, SurfaceUserImplementation};
use smithay::shell::{shell_init, PopupConfigure, ShellState, ShellSurfaceRole,
ShellSurfaceUserImplementation, ToplevelConfigure};
use smithay::shm::with_buffer_contents;
use std::cell::RefCell;
use std::rc::Rc;
use wayland_server::{EventLoop, StateToken};
define_roles!(Roles => [ ShellSurface, ShellSurfaceRole ] );
#[derive(Default)]
pub struct SurfaceData {
pub buffer: Option<(Vec<u8>, (u32, u32))>,
}
pub fn surface_implementation() -> SurfaceUserImplementation<SurfaceData, Roles, ()> {
SurfaceUserImplementation {
commit: |_, _, surface, token| {
// 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
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 => {}
}
});
},
frame: |_, _, _, callback, _| {
callback.done(0);
},
}
}
pub struct ShellIData<F> {
pub token: CompositorToken<SurfaceData, Roles, ()>,
pub window_map: Rc<RefCell<super::WindowMap<SurfaceData, Roles, (), (), F>>>,
}
pub fn shell_implementation<F>() -> ShellSurfaceUserImplementation<SurfaceData, Roles, (), ShellIData<F>, ()>
where
F: Fn(&SurfaceAttributes<SurfaceData>) -> Option<(i32, i32)>,
{
ShellSurfaceUserImplementation {
new_client: |_, _, _| {},
client_pong: |_, _, _| {},
new_toplevel: |_, idata, toplevel| {
// 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);
idata.window_map.borrow_mut().insert(toplevel, (x, y));
ToplevelConfigure {
size: None,
states: vec![],
serial: 42,
}
},
new_popup: |_, _, _| {
PopupConfigure {
size: (10, 10),
position: (10, 10),
serial: 42,
}
},
move_: |_, _, _, _, _| {},
resize: |_, _, _, _, _, _| {},
grab: |_, _, _, _, _| {},
change_display_state: |_, _, _, _, _, _, _| {
ToplevelConfigure {
size: None,
states: vec![],
serial: 42,
}
},
show_window_menu: |_, _, _, _, _, _, _| {},
}
}
fn get_size(attrs: &SurfaceAttributes<SurfaceData>) -> Option<(i32, i32)> {
attrs
.user_data
.buffer
.as_ref()
.map(|&(_, (w, h))| (w as i32, h as i32))
}
pub type MyWindowMap = WindowMap<
SurfaceData,
Roles,
(),
(),
fn(&SurfaceAttributes<SurfaceData>) -> Option<(i32, i32)>,
>;
pub fn init_shell(
evl: &mut EventLoop, log: ::slog::Logger)
-> (
CompositorToken<SurfaceData, Roles, ()>,
StateToken<ShellState<SurfaceData, Roles, (), ()>>,
Rc<RefCell<MyWindowMap>>,
) {
let (compositor_token, _, _) = compositor_init(evl, surface_implementation(), (), log.clone());
let window_map = Rc::new(RefCell::new(WindowMap::<_, _, _, (), _>::new(
compositor_token,
get_size as _,
)));
let (shell_state_token, _, _) = shell_init(
evl,
compositor_token,
shell_implementation(),
ShellIData {
token: compositor_token,
window_map: window_map.clone(),
},
log.clone(),
);
(compositor_token, shell_state_token, window_map)
}