[gpu] Add screen

src/kb_map.rs

@@ -0,0 +1,24 @@
+use sdl2::keyboard::Keycode;
+
+/// get index of key pressed. 0..9+A..F provides a u8
+pub fn get_key_index(p0: Keycode) -> Option<u8> {
+    match p0 {
+        Keycode::Kp0 => Some(0x0),
+        Keycode::Kp1 => Some(0x1),
+        Keycode::Kp2 => Some(0x2),
+        Keycode::Kp3 => Some(0x3),
+        Keycode::Kp4 => Some(0x4),
+        Keycode::Kp5 => Some(0x5),
+        Keycode::Kp6 => Some(0x6),
+        Keycode::Kp7 => Some(0x7),
+        Keycode::Kp8 => Some(0x8),
+        Keycode::Kp9 => Some(0x9),
+        Keycode::A => Some(0xA),
+        Keycode::B => Some(0xB),
+        Keycode::C => Some(0xC),
+        Keycode::D => Some(0xD),
+        Keycode::E => Some(0xE),
+        Keycode::F => Some(0xF),
+        _ => None
+    }
+}