Mercurial > tablet-emu

annotate src/bin/server.rs @ 18:3f7b7a3ad8fe

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Build three binaries instead of using arguments.
author Emmanuel Gil Peyrot <linkmauve@linkmauve.fr>
date Thu, 26 Aug 2021 22:15:55 +0200
parents src/server.rs@0bce7fe96937
children ba09079686a0
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1 // Tablet emulator, for people who don’t own one
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2 // Copyright © 2020 Emmanuel Gil Peyrot <linkmauve@linkmauve.fr>
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3 //
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4 // This program is free software: you can redistribute it and/or modify
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5 // it under the terms of the GNU Affero General Public License as published by
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6 // the Free Software Foundation, either version 3 of the License, or
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7 // (at your option) any later version.
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8 //
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9 // This program is distributed in the hope that it will be useful,
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10 // but WITHOUT ANY WARRANTY; without even the implied warranty of
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11 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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12 // GNU Affero General Public License for more details.
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13 //
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14 // You should have received a copy of the GNU Affero General Public License
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15 // along with this program. If not, see <https://www.gnu.org/licenses/>.
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16
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17 use input_linux::Key;
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18 use std::io::{self, ErrorKind};
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19 use std::net::UdpSocket;
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20 use tablet_emu::protocol::{Buttons, Event};
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21 use tablet_emu::state::State;
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22
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23 pub fn run_server(address: &str) -> io::Result<()> {
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24 let mut state = match State::new() {
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25 Ok(state) => state,
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26 Err(err) => {
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27 match err.kind() {
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28 ErrorKind::NotFound => {
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29 eprintln!("Couldn’t find /dev/uinput: {}", err);
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30 eprintln!("Maybe you forgot to `modprobe uinput`?");
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31 }
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32 ErrorKind::PermissionDenied => {
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33 eprintln!("Couldn’t open /dev/uinput for writing: {}", err);
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34 eprintln!("Maybe you aren’t allowed to create input devices?");
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35 }
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36 _ => eprintln!("Couldn’t open /dev/uinput for writing: {}", err),
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37 }
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38 std::process::exit(1);
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39 }
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40 };
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41
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42 let socket = UdpSocket::bind(address)?;
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43 println!("Listening on {:?}", socket);
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44 println!("Here is an example client: https://hg.linkmauve.fr/remote-gamepad");
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45
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46 let mut event: Event = Default::default();
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47 let mut last = Some((0., 0.));
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48 state.set_size(320, 240);
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49 loop {
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50 // TODO: Yolo-alignment.
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51 let buf: &mut [u8; 16] = unsafe { std::mem::transmute(&mut event) };
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52 let (amount, source) = socket.recv_from(buf)?;
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53 if amount != std::mem::size_of::<Event>() {
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54 eprintln!("Invalid data length: {}", amount);
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55 continue;
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56 }
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57 println!("{:?} from {:?}", event, source);
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58 if event.buttons.contains(Buttons::A) {
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59 state.select_tool(Key::ButtonToolPen);
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60 } else if event.buttons.contains(Buttons::B) {
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61 state.select_tool(Key::ButtonToolRubber);
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62 } else if event.buttons.contains(Buttons::X) {
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63 state.select_tool(Key::ButtonToolBrush);
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64 } else if event.buttons.contains(Buttons::Y) {
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65 state.select_tool(Key::ButtonToolPencil);
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66 } else if event.buttons.contains(Buttons::SELECT) {
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67 state.select_tool(Key::ButtonToolAirbrush);
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68 } else if event.buttons.contains(Buttons::RESIZE) {
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69 println!(
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70 "set_size({}, {})",
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71 event.touch.0 as i32, event.touch.1 as i32
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72 );
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73 state.set_size(event.touch.0 as i32, event.touch.1 as i32);
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74 }
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75 let (x, y) = event.touch;
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76 if event.buttons.contains(Buttons::TOUCH) {
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77 if let None = last {
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78 state.press(x as f64, y as f64)?;
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79 last = Some((x as f64, y as f64));
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80 continue;
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81 }
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82 } else {
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83 if let Some((x, y)) = last {
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84 state.release(x, y)?;
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85 last = None;
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86 continue;
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87 }
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88 }
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89 state.motion(x as f64, y as f64)?;
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90 last = Some((x as f64, y as f64));
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91 }
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92 }
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93
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94 pub fn main() {
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95 let args: Vec<_> = std::env::args().collect();
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96 let address = if args.len() > 1 {
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97 args[1].clone()
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98 } else {
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99 String::from("0.0.0.0:16150")
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100 };
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101 run_server(&address).unwrap();
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102 }