feat: vt additions

members/oxide/src/main.rs

@@ -19,9 +19,9 @@ fn panic(_info: &PanicInfo) -> ! {
     unsafe { __PANIC_HANDLER_WAS_LINKED__DO_NOT_DEFINE() };
 }
 
-use core::{arch::asm, panic::PanicInfo};
+use core::{arch::asm, hint::black_box, panic::PanicInfo};
 
-use crate::vga::VgaBuffer;
+use crate::vga::{ColorNibble, VgaBuffer, VgaColor};
 
 pub mod multiboot2;
 pub mod vga;
@@ -39,6 +39,7 @@ fn start() -> ! {
     vga.write_at(2, 3, b'Y');
 
     let mut vt = vga::vt::Writer::new(vga);
+    vt.set_color(VgaColor::new(ColorNibble::BLUE, ColorNibble::GREEN));
     vt.put_at(10, 5);
     vt.slide();
     vt.write(b"testinggg");
@@ -48,5 +49,20 @@ fn start() -> ! {
     //     }
     // }
 
+    for _ in 0..=5 {
+        sleep_short();
+        vt.slide();
+    }
+
+    sleep_short();
+    vt.reset_screen();
+
     unsafe { asm!("hlt", "ud2", options(noreturn)) };
 }
+
+fn sleep_short() {
+    let mut n = 0_u64;
+    while n < 100_000_000 {
+        black_box(n += 1);
+    }
+}

members/oxide/src/vga/mod.rs

@@ -75,7 +75,7 @@ impl ColorNibble {
     pub const MAGENTA: Self = Self(0b0101);
 
     pub const GRAY: Self = Self(0b1000);
-    pub const GRAY2: Self = Self(0b0111);
+    pub const LIGHT_GRAY: Self = Self(0b0111);
 
     pub const LIGHT_RED: Self = Self(0b1100);
     pub const LIGHT_GREEN: Self = Self(0b1010);

members/oxide/src/vga/vt.rs

@@ -39,6 +39,19 @@ where
         self.pos = (M::WIDTH.min(col), M::HEIGHT.min(row));
     }
 
+    pub fn set_color(&mut self, color: VgaColor) {
+        self.cur_color = color;
+    }
+
+    pub fn reset_screen(&mut self) {
+        for row in self.vga.as_cell_array() {
+            for cell in row {
+                cell.0 = b' ';
+                cell.1 = *self.cur_color;
+            }
+        }
+    }
+
     pub fn write(&mut self, data: &[u8]) {
         const BAD_CHAR_COL: VgaColor = VgaColor::new(ColorNibble::WHITE, ColorNibble::RED);