107 lines
3.0 KiB
Rust
107 lines
3.0 KiB
Rust
use std::error;
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use std::io::Read;
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use std::path;
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use std::process;
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use clap::Parser;
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use piston_window as pw;
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use piston_window::PistonWindow;
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use piston_window::WindowSettings;
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#[derive(Debug, Parser)]
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#[command(author, version, about, long_about = None)]
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struct Cli {
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/// Executable to run
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executable: path::PathBuf,
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/// Number of pixels in a row
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cols: usize,
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/// Number of rows in a frame
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rows: usize,
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/// Free-format arguments to pass to the executable
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args: Vec<String>,
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/// Frame rate for displaying
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#[arg(short, long, default_value_t = 25)]
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frame_rate: u64,
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/// Turn debugging information on
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#[arg(short, long, action = clap::ArgAction::Count)]
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debug: u8,
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}
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fn main() -> Result<(), Box<dyn error::Error>> {
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let cli = Cli::parse();
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if cli.debug >= 2 {
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eprintln!("CLI: {:?}", cli);
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}
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let mut child = process::Command::new(&cli.executable)
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.arg(cli.cols.to_string())
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.arg(cli.rows.to_string())
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.args(cli.args)
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.stdout(process::Stdio::piped())
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.spawn()?;
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if cli.debug >= 1 {
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eprintln!(
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"Running {} as a child process with pid {}",
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cli.executable.display(),
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child.id()
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);
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}
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let mut stdout = child
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.stdout
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.take()
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.ok_or("opening child process stdout failed")?;
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// TODO support also RGBW
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let colors = 3;
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// TODO check for overflow and excessive size
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let buffer_size = cli.cols * cli.rows * colors;
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let mut buffer = vec![0_u8; buffer_size];
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let mut frame_count = 0;
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let mut window: PistonWindow = WindowSettings::new(
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format!("pixelfoo-viewer {}", cli.executable.display()),
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[1600, 800],
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)
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.exit_on_esc(true)
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.vsync(true)
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.build()?;
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let x_size = cli.cols;
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let y_size = cli.rows;
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while let Some(event) = window.next() {
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window.draw_2d(&event, |context, graphics, _device| {
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let [vsx, vsy] = context.get_view_size();
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// Compute cell size
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let csx = (vsx as f64) / (x_size as f64);
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let csy = (vsy as f64) / (y_size as f64);
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let cs = csx.min(csy);
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pw::clear([0.5, 0.5, 0.5, 1.0], graphics);
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stdout.read_exact(&mut buffer).expect("pipe read failed");
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if cli.debug >= 3 {
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eprintln!("Received frame {}", frame_count);
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}
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for y in 0..y_size {
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for x in 0..x_size {
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let i = colors * (y * x_size + x);
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let r = f32::from(buffer[i + 0]) / 255.0;
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let g = f32::from(buffer[i + 1]) / 255.0;
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let b = f32::from(buffer[i + 2]) / 255.0;
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let color = [r, g, b, 1.0];
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let rectangle = [(x as f64) * cs, (y as f64) * cs, cs, cs];
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pw::rectangle(color, rectangle, context.transform, graphics);
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}
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}
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});
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frame_count += 1;
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}
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child.kill()?;
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Ok(())
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}
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