initial commit

oled-to-hex

@@ -0,0 +1,58 @@
+#!/usr/bin/env -S denim
+/* Cargo.toml
+[package]
+name = "oled-to-hex"
+version = "0.1.0"
+authors = ["Anonymous"]
+edition = "2021"
+
+[dependencies]
+image = { version = "0.25.8", default-features = false, features = ["png"] }
+*/
+
+use image::GenericImageView;
+use image::ImageReader;
+use image::Pixel;
+use std::env;
+use std::error::Error;
+use std::io::{Error as IoError, ErrorKind};
+
+/// Example script description
+fn main() -> Result<(), Box<dyn Error>> {
+    let file = env::args().skip(1).next().ok_or(IoError::new(
+        ErrorKind::NotFound,
+        "expected PNG 128x32 file path",
+    ))?;
+    println!("Loading {}", file);
+
+    let img = ImageReader::open(file)?.decode()?;
+    let (w, h) = img.dimensions();
+    println!("Loaded file {}x{}", w, h);
+    if w != 128 && h != 32 {
+        return Err(Into::into(IoError::new(
+            ErrorKind::InvalidData,
+            "bad immage dimensions",
+        )));
+    }
+
+    for row in 0..4 {
+        for column in 0..128 {
+            let mut byte = 0u8;
+            for bit in 0..8 {
+                byte = byte >> 1;
+                let x = column;
+                let y = row * 8 + bit;
+                let pixel = img.get_pixel(x, y);
+                let luma = pixel.to_luma()[0];
+                if luma > 128 {
+                    byte = byte | 128;
+                }
+            }
+            print!("{:02X}", byte);
+        }
+    }
+
+    Ok(())
+}
+
+// vim: ft=rust