Slightly improve code quality

src/main.rs

@@ -74,9 +74,9 @@ fn init_window(event_loop: &EventLoop<()>) -> Window {
 fn draw(chip8_gfx: &[u8], frame: &mut [u8]) {
     for (i, pixel) in frame.chunks_exact_mut(4).enumerate() {
         let rgba = if chip8_gfx[i] == 1 {
-            [0xFF, 0xFF, 0xFF, 0xFF]
+            [0xFF; 4]
         } else {
-            [0x00, 0x00, 0x00, 0xFF]
+            [0x00; 4]
         };
 
         pixel.copy_from_slice(&rgba);

src/periph.rs

@@ -17,7 +17,7 @@ impl Display {
         let mut set_vf = false;
 
         // Each byte in data is a row, with the column being data.len() tall
-        // This means when writing this sprite, x should not change, but y
+        // This means when writing this sprite, x will change for each bit in a byte and y
         // should be incremented by 1 for every new byte we draw to the graphics buffer
         for (y_offset, byte) in data.iter().enumerate() {
             // Access every bit of the byte
@@ -35,14 +35,13 @@ impl Display {
                     break; // Stop Drawing this spite and move on to the next
                 }
 
-                if bit == 0x1 && self.buf[gfx_i] == 0x1 {
+                if bit == 0x1 && self.buf[gfx_i] == 0x01 {
                     set_vf = true;
                 }
 
                 self.buf[gfx_i] ^= bit;
             }
         }
-
         set_vf
     }
 }