235 lines
8.2 KiB
Rust
235 lines
8.2 KiB
Rust
extern crate smithay_client_toolkit as sctk;
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use std::cmp::min;
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use std::io::{BufWriter, Seek, SeekFrom, Write};
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use sctk::reexports::calloop;
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use sctk::reexports::client::protocol::{wl_keyboard, wl_shm, wl_surface};
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use sctk::seat::keyboard::{map_keyboard_repeat, Event as KbEvent, RepeatKind};
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use sctk::shm::MemPool;
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use sctk::window::{ConceptFrame, Event as WEvent};
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sctk::default_environment!(KbdInputExample, desktop);
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fn main() {
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/*
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* Initial setup
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*/
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let (env, display, queue) = sctk::new_default_environment!(KbdInputExample, desktop)
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.expect("Unable to connect to a Wayland compositor");
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/*
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* Prepare a calloop event loop to handle key repetion
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*/
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// Here `Option<WEvent>` is the type of a global value that will be shared by
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// all callbacks invoked by the event loop.
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let mut event_loop = calloop::EventLoop::<Option<WEvent>>::new().unwrap();
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/*
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* Create a buffer with window contents
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*/
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let mut dimensions = (320u32, 240u32);
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/*
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* Init wayland objects
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*/
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let surface = env.create_surface().detach();
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let mut window = env
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.create_window::<ConceptFrame, _>(
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surface,
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None,
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dimensions,
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move |evt, mut dispatch_data| {
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let next_action = dispatch_data.get::<Option<WEvent>>().unwrap();
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// Keep last event in priority order : Close > Configure > Refresh
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let replace = match (&evt, &*next_action) {
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(_, &None)
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| (_, &Some(WEvent::Refresh))
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| (&WEvent::Configure { .. }, &Some(WEvent::Configure { .. }))
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| (&WEvent::Close, _) => true,
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_ => false,
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};
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if replace {
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*next_action = Some(evt);
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}
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},
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)
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.expect("Failed to create a window !");
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window.set_title("Kbd Input".to_string());
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let mut pools = env.create_double_pool(|_| {}).expect("Failed to create a memory pool !");
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/*
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* Keyboard initialization
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*/
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let mut seats = Vec::<(String, Option<(wl_keyboard::WlKeyboard, calloop::Source<_>)>)>::new();
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// first process already existing seats
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for seat in env.get_all_seats() {
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if let Some((has_kbd, name)) = sctk::seat::with_seat_data(&seat, |seat_data| {
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(seat_data.has_keyboard && !seat_data.defunct, seat_data.name.clone())
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}) {
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if has_kbd {
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let seat_name = name.clone();
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match map_keyboard_repeat(
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event_loop.handle(),
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&seat,
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None,
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RepeatKind::System,
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move |event, _, _| print_keyboard_event(event, &seat_name),
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) {
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Ok((kbd, repeat_source)) => {
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seats.push((name, Some((kbd, repeat_source))));
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}
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Err(e) => {
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eprintln!("Failed to map keyboard on seat {} : {:?}.", name, e);
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seats.push((name, None));
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}
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}
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} else {
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seats.push((name, None));
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}
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}
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}
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// then setup a listener for changes
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let loop_handle = event_loop.handle();
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let _seat_listener = env.listen_for_seats(move |seat, seat_data, _| {
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// find the seat in the vec of seats, or insert it if it is unknown
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let idx = seats.iter().position(|(name, _)| name == &seat_data.name);
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let idx = idx.unwrap_or_else(|| {
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seats.push((seat_data.name.clone(), None));
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seats.len() - 1
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});
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let (_, ref mut opt_kbd) = &mut seats[idx];
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// we should map a keyboard if the seat has the capability & is not defunct
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if seat_data.has_keyboard && !seat_data.defunct {
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if opt_kbd.is_none() {
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// we should initalize a keyboard
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let seat_name = seat_data.name.clone();
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match map_keyboard_repeat(
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loop_handle.clone(),
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&seat,
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None,
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RepeatKind::System,
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move |event, _, _| print_keyboard_event(event, &seat_name),
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) {
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Ok((kbd, repeat_source)) => {
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*opt_kbd = Some((kbd, repeat_source));
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}
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Err(e) => {
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eprintln!("Failed to map keyboard on seat {} : {:?}.", seat_data.name, e)
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}
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}
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}
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} else {
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if let Some((kbd, source)) = opt_kbd.take() {
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// the keyboard has been removed, cleanup
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kbd.release();
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loop_handle.remove(source);
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}
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}
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});
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if !env.get_shell().unwrap().needs_configure() {
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// initial draw to bootstrap on wl_shell
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if let Some(pool) = pools.pool() {
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redraw(pool, window.surface(), dimensions).expect("Failed to draw")
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}
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window.refresh();
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}
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let mut next_action = None;
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sctk::WaylandSource::new(queue).quick_insert(event_loop.handle()).unwrap();
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loop {
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match next_action.take() {
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Some(WEvent::Close) => break,
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Some(WEvent::Refresh) => {
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window.refresh();
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window.surface().commit();
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}
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Some(WEvent::Configure { new_size, states }) => {
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if let Some((w, h)) = new_size {
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window.resize(w, h);
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dimensions = (w, h)
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}
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println!("Window states: {:?}", states);
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window.refresh();
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if let Some(pool) = pools.pool() {
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redraw(pool, window.surface(), dimensions).expect("Failed to draw")
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}
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}
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None => {}
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}
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// always flush the connection before going to sleep waiting for events
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display.flush().unwrap();
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event_loop.dispatch(None, &mut next_action).unwrap();
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}
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}
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fn print_keyboard_event(event: KbEvent, seat_name: &str) {
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match event {
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KbEvent::Enter { keysyms, .. } => {
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println!("Gained focus on seat '{}' while {} keys pressed.", seat_name, keysyms.len(),);
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}
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KbEvent::Leave { .. } => {
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println!("Lost focus on seat '{}'.", seat_name);
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}
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KbEvent::Key { keysym, state, utf8, .. } => {
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println!("Key {:?}: {:x} on seat '{}'.", state, keysym, seat_name);
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if let Some(txt) = utf8 {
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println!(" -> Received text \"{}\".", txt);
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}
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}
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KbEvent::Modifiers { modifiers } => {
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println!("Modifiers changed to {:?} on seat '{}'.", modifiers, seat_name);
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}
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KbEvent::Repeat { keysym, utf8, .. } => {
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println!("Key repetition {:x} on seat '{}'.", keysym, seat_name);
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if let Some(txt) = utf8 {
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println!(" -> Received text \"{}\".", txt);
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}
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}
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}
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}
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fn redraw(
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pool: &mut MemPool,
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surface: &wl_surface::WlSurface,
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(buf_x, buf_y): (u32, u32),
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) -> Result<(), ::std::io::Error> {
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// resize the pool if relevant
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pool.resize((4 * buf_x * buf_y) as usize).expect("Failed to resize the memory pool.");
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// write the contents, a nice color gradient =)
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pool.seek(SeekFrom::Start(0))?;
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{
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let mut writer = BufWriter::new(&mut *pool);
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for i in 0..(buf_x * buf_y) {
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let x = (i % buf_x) as u32;
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let y = (i / buf_x) as u32;
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let r: u32 = min(((buf_x - x) * 0xFF) / buf_x, ((buf_y - y) * 0xFF) / buf_y);
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let g: u32 = min((x * 0xFF) / buf_x, ((buf_y - y) * 0xFF) / buf_y);
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let b: u32 = min(((buf_x - x) * 0xFF) / buf_x, (y * 0xFF) / buf_y);
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let pixel: u32 = (0xFF << 24) + (r << 16) + (g << 8) + b;
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writer.write_all(&pixel.to_ne_bytes())?;
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}
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writer.flush()?;
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}
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// get a buffer and attach it
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let new_buffer =
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pool.buffer(0, buf_x as i32, buf_y as i32, 4 * buf_x as i32, wl_shm::Format::Argb8888);
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surface.attach(Some(&new_buffer), 0, 0);
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surface.commit();
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Ok(())
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}
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