Cargo.toml

@@ -14,6 +14,10 @@ path = "examples/hwa.rs"
 name = "con"
 path = "examples/con.rs"
 
+[[example]]
+name = "dark"
+path = "examples/dark.rs"
+
 [profile.release]
 opt-level = "z"
 lto = "thin"

examples/dark.rs

@@ -0,0 +1,118 @@
+#![no_std]
+#![no_main]
+
+use cstr_core::{cstr, CStr};
+
+use kos::{
+    graphics::{display_message, Color, Dot, Size},
+    input::fetch_key,
+    threads::{exit, fetch_event, Event},
+    windows::{
+        define_button, define_window, end_window_draw, get_button_id, invert_pixel,
+        start_window_draw, WindowKind, WindowParams, CLOSE_BUTTON,
+    },
+};
+
+const HEADER: &CStr = cstr!("Dark Mode Demo");
+const TEXT: [&CStr; 6] = [
+    cstr!("Lorem ipsum dolor sit amet,"),
+    cstr!("semper et rutrum placerat,"),
+    cstr!("Integer sed diam commodo quam varius"),
+    cstr!("Sed finibus urna sit amet felis"),
+    cstr!("vestibulum elementum. Maecenas at feugiat lacus"),
+    cstr!("tristique et sit amet tortor."),
+];
+const BTN: u32 = 42;
+const WINDOW_SIZE: Size = Size {
+    width: 400,
+    height: 400,
+};
+
+extern crate alloc;
+
+fn draw_window(invert: bool) {
+    start_window_draw();
+
+    define_window(
+        Dot { x: 50, y: 50 },
+        WINDOW_SIZE,
+        WindowParams {
+            color: Color::rgb(0xff, 0xff, 0xff),
+            kind: WindowKind::FixedThemed,
+            title: Some(HEADER),
+        },
+    );
+
+    display_message(Dot { x: 10, y: 10 }, Color::rgb(0, 0, 0), TEXT[0], None);
+    display_message(Dot { x: 10, y: 50 }, Color::rgb(0, 0, 0), TEXT[1], None);
+    display_message(Dot { x: 10, y: 90 }, Color::rgb(0, 0, 0), TEXT[2], None);
+    display_message(Dot { x: 10, y: 130 }, Color::rgb(0, 0, 0), TEXT[3], None);
+    display_message(Dot { x: 10, y: 170 }, Color::rgb(0, 0, 0), TEXT[4], None);
+    display_message(Dot { x: 10, y: 210 }, Color::rgb(0, 0, 0), TEXT[5], None);
+
+    define_button(
+        Dot { x: 10, y: 300 },
+        Size {
+            width: 100,
+            height: 30,
+        },
+        BTN,
+        true,
+        true,
+        Some(Color::rgb(147, 112, 219)),
+    );
+
+    display_message(
+        Dot { x: 20, y: 310 },
+        Color::rgb(255, 255, 255),
+        if invert {
+            cstr!("Light mode")
+        } else {
+            cstr!("Dark mode")
+        },
+        None,
+    );
+
+    if invert {
+        for x in 0..WINDOW_SIZE.width {
+            for y in 0..WINDOW_SIZE.height {
+                invert_pixel(Dot { x, y })
+            }
+        }
+    }
+
+    end_window_draw();
+
+    return;
+}
+
+fn button_handler(invert: &mut bool) {
+    let btn_id = get_button_id();
+
+    if btn_id.is_some() {
+        match btn_id.unwrap() {
+            CLOSE_BUTTON => exit(),
+            BTN => {
+                *invert = !*invert;
+                draw_window(*invert);
+            }
+            _ => {}
+        }
+    }
+}
+
+#[no_mangle]
+fn kol_main() {
+    let mut invert = false;
+
+    while let Some(ev) =
+        fetch_event((Event::Redraw as u32) | (Event::KeyPress as u32) | (Event::BtnPress as u32))
+    {
+        match ev {
+            Event::Redraw => draw_window(invert),
+            Event::KeyPress => drop(fetch_key()),
+            Event::BtnPress => button_handler(&mut invert),
+            _ => break,
+        }
+    }
+}

src/modules/windows.rs

@@ -39,6 +39,15 @@ pub fn define_window(start: Dot, size: Size, params: WindowParams<'_>) {
     }
 }
 
+pub fn put_pixel(pos: Dot, color: Option<Color>) {
+    let color: u32 = color.unwrap_or(Color::rgb(255, 255, 255)).as_rgb_val();
+    unsafe { sys::put_pixel(pos.x, pos.y, color) }
+}
+
+pub fn invert_pixel(pos: Dot) {
+    unsafe { sys::put_pixel(pos.x, pos.y, 1 << 24) }
+}
+
 pub fn define_button(
     start: Dot,
     size: Size,

src/sys.rs

@@ -8,6 +8,10 @@ extern "C" {
     #[link_name = "_define_window"]
     pub fn define_window(ebx: u32, ecx: u32, edx: u32, esi: u32, edi: u32);
 
+    // 1
+    #[link_name = "_put_pixel"]
+    pub fn put_pixel(ebx: u32, ecx: u32, edx: u32);
+
     // 2
     #[link_name = "_pressed_key"]
     pub fn pressed_key() -> u32;

src/syscalls.S

@@ -7,6 +7,7 @@ section '.text'
     public _start_window_draw
     public _end_window_draw
     public _define_window
+    public _put_pixel
     public _display_message
     public _wait_event
     public _pressed_key
@@ -50,6 +51,14 @@ _define_window:
     pop edi
     ret
 
+_put_pixel:
+    mov eax, SF_PUT_PIXEL
+    mov ebx, dword [esp + 4 * 1]
+    mov ecx, dword [esp + 4 * 2]
+    mov edx, dword [esp + 4 * 3]
+    int 0x40
+    ret
+
 _display_message:
     push esi edi
     mov eax, SF_DRAW_TEXT