layout

user-apps/doom/src/doom.rs

@@ -0,0 +1,55 @@
+const X: usize = 320;
+const Y: usize = 200;
+const SIZE: usize = X * Y;
+
+pub static mut DISPLAY: Option<SimulatorDisplay<Rgb565>> = None;
+pub static mut SCREEN_BUFFER: ScreenBuffer<X, Y, SIZE> = ScreenBuffer::new();
+pub static mut START: Option<Instant> = None;
+
+#[unsafe(no_mangle)]
+extern "C" fn DG_DrawFrame() {
+    let palette565: [Rgb565; 256] = unsafe {
+        colors.map(|c| {
+            Rgb565::new(
+                ((c.r as u16 * 31) / 255) as u8, // red 5 bits
+                ((c.g as u16 * 63) / 255) as u8, // green 6 bits
+                ((c.b as u16 * 31) / 255) as u8, // blue 5 bits
+            )
+        })
+    };
+    let buf = unsafe { &SCREEN_BUFFER.0 };
+
+    let display = unsafe { DISPLAY.as_mut().unwrap() };
+    display.clear(Rgb565::BLACK).unwrap();
+
+    for y in 0..Y {
+        for x in 0..X {
+            let idx = y * X + x;
+            let color = palette565[buf[idx] as usize];
+
+            Pixel(Point::new(x as i32, y as i32), color)
+                .draw(display)
+                .unwrap();
+        }
+    }
+}
+
+#[unsafe(no_mangle)]
+extern "C" fn DG_GetTicksMs() -> u32 {
+    let start = unsafe { START.unwrap() };
+    Instant::now()
+        .duration_since(start)
+        .as_millis()
+        .try_into()
+        .expect("Cannot Fit Start time into u32")
+}
+
+#[unsafe(no_mangle)]
+extern "C" fn DG_GetKey(pressed: *mut raw::c_int, key: *mut raw::c_uchar) -> raw::c_int {
+    0
+}
+
+#[unsafe(no_mangle)]
+extern "C" fn DG_SleepMs(ms: u32) {
+    sleep(Duration::from_millis(ms as u64));
+}

user-apps/doom/src/main.rs

@@ -0,0 +1,30 @@
+#![no_std]
+#![no_main]
+
+extern crate alloc;
+use abi::{
+    display::Display,
+    fs::{file_len, read_file},
+    get_key, get_ms,
+    keyboard::{KeyCode, KeyState},
+    print, sleep,
+};
+use alloc::vec;
+use core::panic::PanicInfo;
+use embedded_graphics::{pixelcolor::Rgb565, prelude::Point};
+
+#[panic_handler]
+fn panic(info: &PanicInfo) -> ! {
+    print!("user panic: {} @ {:?}", info.message(), info.location(),);
+    loop {}
+}
+
+#[unsafe(no_mangle)]
+pub extern "Rust" fn _start() {
+    main()
+}
+
+pub fn main() {
+    print!("Starting Doom app");
+    let mut display = Display;
+}