84 lines
2.8 KiB
Rust
84 lines
2.8 KiB
Rust
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use std::{
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env,
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fs::File,
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io::{stdin, stdout, IsTerminal, Read, Write},
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ops::Neg,
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os::unix::process::CommandExt,
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path::Path,
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process::{exit, Command},
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};
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// takes all charaters in bdf and returns a vec of each character row byte in order, normalized to
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// width & height of the font (only works with 8 or fewer pixel wide fonts, should work for any height)
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fn bdf_to_bitmap(mut bdf: File) -> [u8; 0x8000] {
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let mut bdf_font_bytes = Vec::new();
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bdf.read_to_end(&mut bdf_font_bytes).unwrap();
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let bdf_font = bdf_parser::BdfFont::parse(&bdf_font_bytes).unwrap();
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let mut bdf_vec = vec![];
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for glyph in bdf_font.glyphs.iter() {
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let glyph_offset_x = glyph.bounding_box.offset.x;
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let glyph_offset_y = glyph.bounding_box.offset.y;
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let glyph_height = glyph.bounding_box.size.y;
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let font_height = bdf_font.metadata.bounding_box.size.y;
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let font_offset_y = bdf_font.metadata.bounding_box.offset.y;
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let top_space = font_height + font_offset_y - glyph_height - glyph_offset_y;
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for _ in 0..top_space {
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bdf_vec.push(0x00);
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}
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for bitmap in glyph.bitmap.iter() {
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bdf_vec.push(bitmap >> glyph_offset_x);
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}
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let bottom_space = font_offset_y.neg() + glyph_offset_y;
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for _ in 0..bottom_space {
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bdf_vec.push(0x00);
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}
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}
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let height = bdf_font.metadata.bounding_box.size.y as usize;
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reorder_bitmap(&bdf_vec, height)
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}
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// takes an vec of ordered characters and translates them for use with the character rom
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// TODO: make this work for any arbitrary char rom pin format using some kinda interface
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fn reorder_bitmap(bitmap: &[u8], font_height: usize) -> [u8; 0x8000] {
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let mut rom = [0; 0x8000]; // create vec the size of character rom
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for row in 0..font_height {
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for ascii_address in 0..u8::MAX {
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// first 8 bits of address pick character
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// next 5 bits pick row
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// TODO: final 2 pick character set
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let byte = bitmap[ascii_address as usize * font_height + row];
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let rom_index: u16 = ((row as u16) << 8) + ascii_address as u16;
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rom[rom_index as usize] = byte;
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}
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}
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rom
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}
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fn rom_from_file<P>(path: P) -> [u8; 0x8000]
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where
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P: AsRef<Path>,
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{
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let file = File::open(path).unwrap();
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bdf_to_bitmap(file)
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}
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fn main() {
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let mut regen_font = Command::new("regen-font.sh");
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let mut cleanup = Command::new("cleanup.sh");
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regen_font.exec();
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let out_dir = env::var_os("OUT_DIR").unwrap();
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let dest_path = Path::new(&out_dir).join("cozette.rom");
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let cozette_rom_bytes = rom_from_file("build/cozette.bdf");
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let mut cozette_rom = File::create(dest_path).unwrap();
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cozette_rom.write_all(&cozette_rom_bytes).unwrap();
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cleanup.exec();
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}
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