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annotate src/server.rs @ 17:0bce7fe96937

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Add a client, copy of the GTK interface.
author Emmanuel Gil Peyrot <linkmauve@linkmauve.fr>
date Thu, 26 Aug 2021 22:00:55 +0200
parents 478cf2a7d577
children
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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 crate::state::State;
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18 use bitflags::bitflags;
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19 use input_linux::Key;
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20 use std::io::{self, ErrorKind};
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21 use std::net::UdpSocket;
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22
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23 bitflags! {
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24 /// This is the memory layout of the buttons on the 3DS.
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25 #[derive(Default)]
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26 pub struct Buttons: u32 {
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27 const A = 0x00000001;
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28 const B = 0x00000002;
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29 const SELECT = 0x00000004;
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30 const START = 0x00000008;
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31 const RIGHT = 0x00000010;
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32 const LEFT = 0x00000020;
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33 const UP = 0x00000040;
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34 const DOWN = 0x00000080;
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35 const R = 0x00000100;
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36 const L = 0x00000200;
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37 const X = 0x00000400;
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38 const Y = 0x00000800;
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39 // Nothing
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40 // Nothing
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41 const ZL = 0x00004000;
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42 const ZR = 0x00008000;
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43 const RESIZE = 0x00010000; // Not an actual 3DS button!
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44 // Nothing
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45 // Nothing
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46 // Nothing
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47 const TOUCH = 0x00100000;
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48 // Nothing
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49 // Nothing
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50 // Nothing
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51 const C_RIGHT = 0x01000000;
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52 const C_LEFT = 0x02000000;
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53 const C_UP = 0x04000000;
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54 const C_DOWN = 0x08000000;
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55 const CIRCLE_RIGHT = 0x10000000;
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56 const CIRCLE_LEFT = 0x20000000;
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57 const CIRCLE_UP = 0x40000000;
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58 const CIRCLE_DOWN = 0x80000000;
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59 }
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60 }
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61
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62 #[derive(Debug, Default)]
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63 pub struct Event {
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64 pub buttons: Buttons,
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65 pad: (i16, i16),
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66 c_pad: (i16, i16),
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67 pub touch: (u16, u16),
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68 }
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69
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70 pub fn run_server(address: &str) -> io::Result<()> {
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71 let mut state = match State::new() {
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72 Ok(state) => state,
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73 Err(err) => {
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74 match err.kind() {
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75 ErrorKind::NotFound => {
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76 eprintln!("Couldn’t find /dev/uinput: {}", err);
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77 eprintln!("Maybe you forgot to `modprobe uinput`?");
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78 }
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79 ErrorKind::PermissionDenied => {
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80 eprintln!("Couldn’t open /dev/uinput for writing: {}", err);
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81 eprintln!("Maybe you aren’t allowed to create input devices?");
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82 }
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83 _ => eprintln!("Couldn’t open /dev/uinput for writing: {}", err),
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84 }
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85 std::process::exit(1);
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86 }
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87 };
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88
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89 let socket = UdpSocket::bind(address)?;
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90 println!("Listening on {:?}", socket);
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91 println!("Here is an example client: https://hg.linkmauve.fr/remote-gamepad");
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92
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93 let mut event: Event = Default::default();
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94 let mut last = Some((0., 0.));
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95 state.set_size(320, 240);
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96 loop {
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97 // TODO: Yolo-alignment.
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98 let buf: &mut [u8; 16] = unsafe { std::mem::transmute(&mut event) };
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99 let (amount, source) = socket.recv_from(buf)?;
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100 if amount != std::mem::size_of::<Event>() {
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101 eprintln!("Invalid data length: {}", amount);
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102 continue;
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103 }
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104 println!("{:?} from {:?}", event, source);
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105 if event.buttons.contains(Buttons::A) {
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106 state.select_tool(Key::ButtonToolPen);
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107 } else if event.buttons.contains(Buttons::B) {
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108 state.select_tool(Key::ButtonToolRubber);
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109 } else if event.buttons.contains(Buttons::X) {
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110 state.select_tool(Key::ButtonToolBrush);
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111 } else if event.buttons.contains(Buttons::Y) {
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112 state.select_tool(Key::ButtonToolPencil);
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113 } else if event.buttons.contains(Buttons::SELECT) {
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114 state.select_tool(Key::ButtonToolAirbrush);
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115 } else if event.buttons.contains(Buttons::RESIZE) {
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116 println!("set_size({}, {})", event.touch.0 as i32, event.touch.1 as i32);
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117 state.set_size(event.touch.0 as i32, event.touch.1 as i32);
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118 }
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119 let (x, y) = event.touch;
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120 if event.buttons.contains(Buttons::TOUCH) {
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121 if let None = last {
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122 state.press(x as f64, y as f64)?;
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123 last = Some((x as f64, y as f64));
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124 continue;
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125 }
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126 } else {
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127 if let Some((x, y)) = last {
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128 state.release(x, y)?;
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129 last = None;
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130 continue;
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131 }
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132 }
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133 state.motion(x as f64, y as f64)?;
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134 last = Some((x as f64, y as f64));
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135 }
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136 }
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137
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138 pub fn main(args: &[String]) {
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139 let address = if args.len() > 1 {
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140 args[1].clone()
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141 } else {
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142 String::from("0.0.0.0:16150")
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143 };
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144 run_server(&address).unwrap();
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145 }