basic init, rendering of display for chip

1 files changed, 71 insertions, 2 deletions

diff --git a/src/lib.rs b/src/lib.rs
index 577bab9..6089af3 100644
--- a/src/lib.rs
+++ b/src/lib.rs
@@ -1,4 +1,73 @@
-pub struct Chip8 {
-    mem : [u32],
+//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
+    }
 }