66 lines
1.6 KiB
Rust
Executable File
66 lines
1.6 KiB
Rust
Executable File
#!/usr/bin/env -S denim
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/* Cargo.toml
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[package]
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name = "oled-to-hex"
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version = "0.1.0"
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authors = ["Anonymous"]
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edition = "2021"
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[dependencies]
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image = { version = "0.25.8", default-features = false, features = ["png"] }
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atty = { version = "0.2.14" }
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*/
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use image::GenericImageView;
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use image::ImageReader;
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use image::Pixel;
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use std::env;
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use std::error::Error;
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use std::io::{stdout, Error as IoError, ErrorKind, Write};
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/// Example script description
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fn main() -> Result<(), Box<dyn Error>> {
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let file = env::args().skip(1).next().ok_or(IoError::new(
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ErrorKind::NotFound,
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"expected PNG 128x32 file path",
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))?;
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eprintln!("Loading {}", file);
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let img = ImageReader::open(file)?.decode()?;
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let (w, h) = img.dimensions();
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eprintln!("Loaded file {}x{}", w, h);
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if w != 128 && h != 32 {
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return Err(Into::into(IoError::new(
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ErrorKind::InvalidData,
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"bad immage dimensions",
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)));
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}
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let out_hex = atty::is(atty::Stream::Stdout);
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for row in 0..4 {
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for column in 0..128 {
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let mut byte = 0u8;
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for bit in 0..8 {
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byte = byte >> 1;
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let x = column;
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let y = row * 8 + bit;
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let pixel = img.get_pixel(x, y);
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let luma = pixel.to_luma()[0];
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if luma > 128 {
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byte = byte | 128;
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}
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}
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if out_hex {
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print!("{:02X}", byte);
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} else {
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stdout().write(&[byte]).unwrap();
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}
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}
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}
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Ok(())
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}
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// vim: ft=rust
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