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66 lines
2.2 KiB
Rust
66 lines
2.2 KiB
Rust
//! pixel-cell example
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//!
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//! Shows how to get the size of a cell in pixels
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//!
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//! It works on the following terminals:
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//! - kitty
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//! - xterm (invoked with `xterm -ti vt340`)
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//! - alacritty (WIP https://github.com/ayosec/alacritty/tree/graphics)
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use rand::{distributions::Uniform, Rng};
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use libnotcurses_sys::*;
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fn main() -> NcResult<()> {
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let mut nc = FullMode::new()?;
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if !nc.check_pixel_support()? {
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return Err(NcError::new_msg("Current terminal doesn't support pixels."));
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}
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// get the dimensions of the terminal in rows,cols & x,y pixels
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let mut ws: libc::winsize = unsafe { std::mem::zeroed() };
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unsafe { libc::ioctl(0, libc::TIOCGWINSZ, &mut ws) };
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let term_rows = ws.ws_row;
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let term_cols = ws.ws_col;
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let term_y = ws.ws_ypixel;
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let term_x = ws.ws_xpixel;
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// calculate the size of the cell in pixels
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let cell_y = (term_y / term_rows) as u32;
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let cell_x = (term_x / term_cols) as u32;
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// println!(
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// "rows,cols={},{}; term y,x={},{}; cell y,x={},{}",
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// term_rows, term_cols, term_y, term_x, cell_y, cell_x
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// );
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// print visual delimiters around our pixelized cell
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println!("0▗│▖\n│─ ─\n2▝│▘");
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println!("a cell is {}x{} pixels", cell_y, cell_x);
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// fill the buffer with random color pixels
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let mut rng = rand::thread_rng();
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let range = Uniform::from(50..=180);
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let mut buffer = Vec::<u8>::with_capacity((cell_y * cell_x * 4) as usize);
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#[allow(unused_parens)]
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for _byte in (0..={ cell_y * cell_x }) {
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buffer.push(rng.sample(&range));
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buffer.push(rng.sample(&range));
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buffer.push(rng.sample(&range));
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buffer.push(255);
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}
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// show the newly created ncvisual delimited with the box drawing characters
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let pixels = NcVisual::from_rgba(buffer.as_slice(), cell_y, cell_x * 4, cell_x)?;
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let voptions = NcVisualOptions::without_plane(1, 2, 0, 0, cell_y, cell_x, NCBLIT_PIXEL, 0, 0);
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pixels.render(&mut nc, &voptions)?;
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// FIXME: segfaults
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// let mut stdplane = nc.stdplane();
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// let mut vplane = NcPlane::new_bound(&mut stdplane, 0, 0, 4, 4)?
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rsleep![&mut nc, 10];
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pixels.destroy();
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Ok(())
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}
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