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//Basic struct to represent the Chip-8 interpreter structure
use sdl2::keyboard::Keycode;
use sdl2::rect::Rect;
pub const WIDTH : u32 = 32;
pub const HEIGHT : u32 = 64;
pub const SCALE : u32 = 20;
const DISPLAY_LENGTH : usize = (WIDTH * HEIGHT) as usize;
pub struct Chip {
mem : [u8; 4096],
registers: [u8; 16],
index: u16,
pc: u16,
stack: [u16; 16],
sp: u8,
delay_timer: u8,
sound_timer: u8,
keys : [Keycode; 16],
fonts : [u32; 80],
display: [Rect; DISPLAY_LENGTH as usize]
}
impl Chip {
pub fn new() -> Self {
Chip {
mem : [0; 4096],
registers: [0; 16],
index: 0,
pc: 0,
stack: [0; 16],
sp: 0,
delay_timer: 0,
sound_timer: 0,
keys: [Keycode::Num1, Keycode::Num2, Keycode::Num3, Keycode::Num4, Keycode::Q, Keycode::W, Keycode::E, Keycode::R, Keycode::A, Keycode::S, Keycode::D, Keycode::F, Keycode::Z, Keycode::X, Keycode::C, Keycode::V],
fonts: [
0xF0, 0x90, 0x90, 0x90, 0xF0, // 0
0x20, 0x60, 0x20, 0x20, 0x70, // 1
0xF0, 0x10, 0xF0, 0x80, 0xF0, // 2
0xF0, 0x10, 0xF0, 0x10, 0xF0, // 3
0x90, 0x90, 0xF0, 0x10, 0x10, // 4
0xF0, 0x80, 0xF0, 0x10, 0xF0, // 5
0xF0, 0x80, 0xF0, 0x90, 0xF0, // 6
0xF0, 0x10, 0x20, 0x40, 0x40, // 7
0xF0, 0x90, 0xF0, 0x90, 0xF0, // 8
0xF0, 0x90, 0xF0, 0x10, 0xF0, // 9
0xF0, 0x90, 0xF0, 0x90, 0x90, // A
0xE0, 0x90, 0xE0, 0x90, 0xE0, // B
0xF0, 0x80, 0x80, 0x80, 0xF0, // C
0xE0, 0x90, 0x90, 0x90, 0xE0, // D
0xF0, 0x80, 0xF0, 0x80, 0xF0, // E
0xF0, 0x80, 0xF0, 0x80, 0x80 // F
],
display: [Rect::new(0, 0, SCALE - 1, SCALE - 1); DISPLAY_LENGTH],
}
}
pub fn init(mut self) {
}
pub fn render(& mut self) -> &[Rect] {
for idx in 0..DISPLAY_LENGTH {
let (mut x_coord, mut y_coord) : (i32, i32) =((idx as i32 % WIDTH as i32), (idx as i32 / WIDTH as i32));
x_coord *= SCALE as i32;
y_coord *= SCALE as i32;
self.display[idx].set_x(x_coord);
self.display[idx].set_y(y_coord);
}
&self.display
}
}
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