mirror of
https://github.com/imjasonh/nescript
synced 2026-07-15 20:58:20 +00:00
058f7a87b6
Parser extensions:
- sprite declarations with chr: @chr("file.png"), @binary("file.bin"), or inline [hex]
- palette declarations with colors: [0x0F, 0x00, 0x10, 0x20]
- background declarations with chr: asset source
- @chr/@binary asset source parsing
- load_background and set_palette statements
- --debug CLI flag (plumbed through, not yet wired to codegen)
Asset pipeline (new module):
- PNG → CHR tile conversion using image crate (8x8 tiles, 2-bitplane encoding)
- NES color palette table (all 64 standard NES colors as RGB)
- Nearest-color matching (Euclidean distance in RGB space)
Debug module (new):
- Source map (ROM address → source Span mapping)
- Debug symbols with variable address table
- Mesen-compatible .mlb label export
- .sym symbol table export
192 tests total (13 new: 5 parser + 3 asset + 5 debug)
https://claude.ai/code/session_01W6eQFStA66EuMKHUFo2rx3
88 lines
2.5 KiB
Rust
88 lines
2.5 KiB
Rust
/// NES color palette -- 64 colors as (R, G, B) tuples.
|
|
pub const NES_COLORS: [(u8, u8, u8); 64] = [
|
|
// Row 0
|
|
(84, 84, 84), // 0x00
|
|
(0, 30, 116), // 0x01
|
|
(8, 16, 144), // 0x02
|
|
(48, 0, 136), // 0x03
|
|
(68, 0, 100), // 0x04
|
|
(92, 0, 48), // 0x05
|
|
(84, 4, 0), // 0x06
|
|
(60, 24, 0), // 0x07
|
|
(32, 42, 0), // 0x08
|
|
(8, 58, 0), // 0x09
|
|
(0, 64, 0), // 0x0A
|
|
(0, 60, 0), // 0x0B
|
|
(0, 50, 60), // 0x0C
|
|
(0, 0, 0), // 0x0D
|
|
(0, 0, 0), // 0x0E
|
|
(0, 0, 0), // 0x0F
|
|
// Row 1
|
|
(152, 150, 152), // 0x10
|
|
(8, 76, 196), // 0x11
|
|
(48, 50, 236), // 0x12
|
|
(92, 30, 228), // 0x13
|
|
(136, 20, 176), // 0x14
|
|
(160, 20, 100), // 0x15
|
|
(152, 34, 32), // 0x16
|
|
(120, 60, 0), // 0x17
|
|
(84, 90, 0), // 0x18
|
|
(40, 114, 0), // 0x19
|
|
(8, 124, 0), // 0x1A
|
|
(0, 118, 40), // 0x1B
|
|
(0, 102, 120), // 0x1C
|
|
(0, 0, 0), // 0x1D
|
|
(0, 0, 0), // 0x1E
|
|
(0, 0, 0), // 0x1F
|
|
// Row 2
|
|
(236, 238, 236), // 0x20
|
|
(76, 154, 236), // 0x21
|
|
(120, 124, 236), // 0x22
|
|
(176, 98, 236), // 0x23
|
|
(228, 84, 236), // 0x24
|
|
(236, 88, 180), // 0x25
|
|
(236, 106, 100), // 0x26
|
|
(212, 136, 32), // 0x27
|
|
(160, 170, 0), // 0x28
|
|
(116, 196, 0), // 0x29
|
|
(76, 208, 32), // 0x2A
|
|
(56, 204, 108), // 0x2B
|
|
(56, 180, 204), // 0x2C
|
|
(60, 60, 60), // 0x2D
|
|
(0, 0, 0), // 0x2E
|
|
(0, 0, 0), // 0x2F
|
|
// Row 3
|
|
(236, 238, 236), // 0x30
|
|
(168, 204, 236), // 0x31
|
|
(188, 188, 236), // 0x32
|
|
(212, 178, 236), // 0x33
|
|
(236, 174, 236), // 0x34
|
|
(236, 174, 212), // 0x35
|
|
(236, 180, 176), // 0x36
|
|
(228, 196, 144), // 0x37
|
|
(204, 210, 120), // 0x38
|
|
(180, 222, 120), // 0x39
|
|
(168, 226, 144), // 0x3A
|
|
(152, 226, 180), // 0x3B
|
|
(160, 214, 228), // 0x3C
|
|
(160, 162, 160), // 0x3D
|
|
(0, 0, 0), // 0x3E
|
|
(0, 0, 0), // 0x3F
|
|
];
|
|
|
|
/// Find the nearest NES color index for an RGB value.
|
|
pub fn nearest_nes_color(r: u8, g: u8, b: u8) -> u8 {
|
|
let mut best_idx = 0u8;
|
|
let mut best_dist = u32::MAX;
|
|
for (i, &(nr, ng, nb)) in NES_COLORS.iter().enumerate() {
|
|
let dr = i32::from(r) - i32::from(nr);
|
|
let dg = i32::from(g) - i32::from(ng);
|
|
let db = i32::from(b) - i32::from(nb);
|
|
let dist = (dr * dr + dg * dg + db * db).unsigned_abs();
|
|
if dist < best_dist {
|
|
best_dist = dist;
|
|
best_idx = i as u8;
|
|
}
|
|
}
|
|
best_idx
|
|
}
|