Initial commit, font address order works i think

src/main.rs

@@ -0,0 +1,73 @@
+#![allow(dead_code, clippy::println_empty_string)]
+use std::{
+    fs::File,
+    ops::{Add, AddAssign},
+};
+
+extern crate png;
+
+extern crate bdf;
+const ADDRESS_SIZE: usize = 13;
+const ROW_BITS: usize = 5;
+const CHAR_BITS: usize = 8;
+
+const MAX_ROWS: usize = 13;
+const MAX_CHARS: u8 = 0xFF;
+
+struct CharRowAddress {
+    row_address: u8,
+    char_address: u8,
+}
+
+impl CharRowAddress {
+    fn new() -> Self {
+        Self {
+            row_address: 0x00,
+            char_address: 0x00,
+        }
+    }
+    fn inc_row(&mut self) {
+        if self.row_address.add(0x01) > 0b0001_1111 {
+        } else {
+            self.row_address.add_assign(0x01);
+        }
+    }
+    fn inc_char(&mut self) {
+        if self.char_address.add(0x01) > 0b0111_1111 {
+        } else {
+            self.char_address.add_assign(0x01);
+        }
+    }
+}
+
+impl std::fmt::Display for CharRowAddress {
+    fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
+        write!(f, "{:05b}{:07b}", self.row_address, self.char_address)
+    }
+}
+
+fn main() -> std::io::Result<()> {
+    let decoder = png::Decoder::new(File::open("./cozette.png").unwrap());
+    let mut reader = decoder.read_info().unwrap();
+    let mut buf = vec![0; reader.output_buffer_size()];
+    let info = reader.next_frame(&mut buf).unwrap();
+    let bytes = &buf[..info.buffer_size()];
+    let compressed: Vec<u8> = bytes.iter().step_by(4).cloned().collect();
+    let mut address = CharRowAddress::new();
+    for row in 0..MAX_ROWS {
+        address.inc_row();
+        for character in 0x00..0x7F {
+            address.inc_char();
+            print!("{}	", character as usize * row);
+            for i in 0..7 {
+                if compressed[character as usize * 7 + i + (row * 0x7f)] == 255 {
+                    print!("█");
+                } else {
+                    print!(" ");
+                }
+            }
+            println!("");
+        }
+    }
+    Ok(())
+}