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Add program to capture using libinput

This commit is contained in:
Enrico Lumetti 2020-04-19 18:34:06 +02:00
commit 697714edf3
4 changed files with 279 additions and 0 deletions
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Cargo.toml Normal file
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[package]
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authors = ["Enrico Lumetti <enrico.lumetti@gmail.com>"]
edition = "2018"
# See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
[dependencies]
input = { git = "https://github.com/Smithay/input.rs" }
udev = "0.2"
libc = "0.2"
errno = "0.2"
csv = "1.1.3"

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src/bin/libinput_capture.rs Normal file
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use input::{Libinput, LibinputInterface};
use input::event::Event;
use input::event::tablet_tool::{TabletToolEvent, TabletToolEventTrait};
use std::ffi::CString;
use std::path::Path;
use std::os::unix::io::{RawFd};
struct SimpleLibinputInterface;
impl LibinputInterface for SimpleLibinputInterface {
fn open_restricted(&mut self, path: &Path, flags: i32) -> Result<RawFd, i32> {
let c_path = path.to_str()
.map(|s| CString::new(s).unwrap())
.unwrap();
let fd = unsafe {
libc::open64(c_path.as_ptr(), flags)
};
if fd < 0 {
let err: i32 = errno::errno().into();
std::println!("{:?}, flags({}), fd({})", path, flags, fd);
Err(-err)
} else {
Ok(fd)
}
}
fn close_restricted(&mut self, fd: RawFd) {
unsafe { libc::close(fd); }
}
}
fn main() {
let udev_ctx = udev::Context::new().unwrap();
let libinput_interface = SimpleLibinputInterface{};
let mut libinput_ctx = Libinput::new_from_udev(libinput_interface, &udev_ctx);
libinput_ctx.udev_assign_seat("seat0").unwrap();
let mut csv_writer = csv::Writer::from_path("acquired_data.csv").unwrap();
csv_writer.write_record(&["x", "y", "pressure", "time_usec"]).expect("write error");
loop {
while let Some(event) = libinput_ctx.next() {
if let Event::Tablet(tablet_evt) = event {
if let TabletToolEvent::Axis(axis_evt) = tablet_evt {
if axis_evt.pressure() > 1e-3 {
let pressure = axis_evt.pressure();
let x_t = axis_evt.x_transformed(1080);
let y_t = axis_evt.y_transformed(1920);
let time_usec = axis_evt.time_usec();
std::println!(
"(x, y) = ({}, {})\npressure = {}\n(tilt_x, tilt_y) = ({}, {})\n",
x_t,
y_t,
pressure,
axis_evt.tilt_x(),
axis_evt.tilt_y());
csv_writer.write_record(&[x_t.to_string(), y_t.to_string(), pressure.to_string(), time_usec.to_string()]).expect("write error");
csv_writer.flush().expect("write error");
}
}
}
}
libinput_ctx.dispatch().unwrap();
}
}