Reorganize assets; switch the HUD to the Micro Chat font

Source packs move to assets/packs (untouched), maps to assets/maps, and the
palette/sketch leftovers from the 8-bit era go. tools/mkfont.py repacks
VEXED's Micro Chat sheet (8-column grid, 8x10 cells) into the CP437 atlas
layout the font loader already reads, cropped to 8x9 so the HUD can use an
8 px line height. The CGA atlas is dropped in its favor.

Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>

game/src/font.rs

@@ -140,13 +140,13 @@ pub fn cp437(ch: char) -> u8 {
 mod tests {
     use super::*;
 
-    fn cga() -> Font {
-        Font::from_png(concat!(env!("CARGO_MANIFEST_DIR"), "/../assets/fonts/cga-8x8.png"), 8, 8)
+    fn font() -> Font {
+        Font::from_png(concat!(env!("CARGO_MANIFEST_DIR"), "/../assets/fonts/micro-chat-8x9.png"), 8, 9)
     }
 
     #[test]
     fn measures_ink_and_advances_proportionally() {
-        let f = cga();
+        let f = font();
         assert_eq!(f.width[b' ' as usize], 0);
         assert!(f.width[b'i' as usize] < f.width[b'M' as usize]);
         assert_eq!(f.text_width(" "), 4);
@@ -155,7 +155,7 @@ mod tests {
 
     #[test]
     fn draws_only_ink_in_the_given_color() {
-        let f = cga();
+        let f = font();
         let mut frame = vec![0u16; 32 * 8];
         let end = f.draw(&mut frame, 32, 0, 0, 0xFFFF, "I");
         assert_eq!(end, f.width[b'I' as usize] as i32 + 1);
@@ -167,7 +167,7 @@ mod tests {
 
     #[test]
     fn wraps_on_width_and_hard_newlines() {
-        let f = cga();
+        let f = font();
         let w3 = f.text_width("aaa");
         assert_eq!(f.wrap("aaa bbb ccc", w3), vec!["aaa", "bbb", "ccc"]);
         assert_eq!(f.wrap("aaa bbb ccc", f.text_width("aaa bbb")), vec!["aaa bbb", "ccc"]);

game/src/game.rs

@@ -58,7 +58,7 @@ const SPRITE_FOX:    u16 = 2;
 const HUD_X: i32 = VIEW_PX;
 const HUD_W: i32 = 320 - VIEW_PX;
 const HUD_PAD: i32 = 3;
-const LINE_H: i32 = 9;
+const LINE_H: i32 = 8;
 const HUD_BG:     u16 = pbio::rgb565(16, 12, 24);
 const HUD_FRAME:  u16 = pbio::rgb565(120, 100, 140);
 const HUD_TEXT:   u16 = pbio::rgb565(235, 235, 255);
@@ -108,7 +108,7 @@ impl Game {
     pub fn start(map_path: &str) -> Self {
         let tileset = Image::from_png("assets/tilesets/overworld.png").to_tileset();
         let entity_tileset = Image::from_png("assets/tilesets/entities.png").to_tileset();
-        let font = Font::from_png("assets/fonts/cga-8x8.png", 8, 8);
+        let font = Font::from_png("assets/fonts/micro-chat-8x9.png", 8, 9);
 
         let t0 = std::time::Instant::now();
         let map = TileMap::from_csv(map_path);
@@ -568,7 +568,7 @@ mod snapshot {
     fn population() {
         std::env::set_current_dir("..").unwrap();
         let secs: usize = std::env::var("SECONDS").ok().and_then(|s| s.parse().ok()).unwrap_or(60);
-        let mut g = super::Game::start("assets/map_test");
+        let mut g = super::Game::start("assets/maps/map_test");
         let input = crate::input::InputState::new();
         let mut frame = vec![0u16; 320 * 240];
         for _ in 0..secs * 60 {
@@ -585,7 +585,7 @@ mod snapshot {
     #[ignore]
     fn dump_frame() {
         std::env::set_current_dir("..").unwrap();
-        let map = std::env::var("SNAPSHOT_MAP").unwrap_or_else(|_| "assets/map_test".into());
+        let map = std::env::var("SNAPSHOT_MAP").unwrap_or_else(|_| "assets/maps/map_test".into());
         let mut g = super::Game::start(&map);
         let input = crate::input::InputState::new();
         let mut frame = vec![0u16; 320 * 240];

game/src/main.rs

@@ -21,8 +21,8 @@ fn main() {
     let input_map = input::InputMap::new();
     let mut input_state = input::InputState::new();
     let mut last_update = Instant::now();
-    // Optional map path: `game assets/map_large`.
-    let map_path = std::env::args().nth(1).unwrap_or_else(|| "assets/map_test".into());
+    // Optional map path: `game assets/maps/map_large`.
+    let map_path = std::env::args().nth(1).unwrap_or_else(|| "assets/maps/map_test".into());
     let mut game = game::Game::start(&map_path);
 
     while !plat.should_close() {