chore: improve code clarity

src/ppu.zig

@@ -11,17 +11,19 @@ pub const buf_pitch = width * @sizeOf(u16);
 const buf_len = buf_pitch * height;
 
 pub const Ppu = struct {
+    const Self = @This();
+
     vram: Vram,
     palette: Palette,
     sched: *Scheduler,
     frame_buf: []u8,
     alloc: Allocator,
 
-    pub fn init(alloc: Allocator, sched: *Scheduler) !@This() {
+    pub fn init(alloc: Allocator, sched: *Scheduler) !Self {
         // Queue first Hblank
-        sched.push(.{ .kind = .Draw, .tick = sched.tick + 240 * 4 });
+        sched.push(.Draw, sched.tick + (240 * 4));
 
-        return @This(){
+        return Self{
             .vram = try Vram.init(alloc),
             .palette = try Palette.init(alloc),
             .sched = sched,
@@ -30,13 +32,13 @@ pub const Ppu = struct {
         };
     }
 
-    pub fn deinit(self: @This()) void {
+    pub fn deinit(self: Self) void {
         self.alloc.free(self.frame_buf);
         self.vram.deinit();
         self.palette.deinit();
     }
 
-    pub fn drawScanline(self: *@This(), io: *const Io) void {
+    pub fn drawScanline(self: *Self, io: *const Io) void {
         const bg_mode = io.dispcnt.bg_mode.read();
         const scanline = io.vcount.scanline.read();
 
@@ -54,77 +56,81 @@ pub const Ppu = struct {
 };
 
 const Palette = struct {
+    const Self = @This();
+
     buf: []u8,
     alloc: Allocator,
 
-    fn init(alloc: Allocator) !@This() {
-        return @This(){
+    fn init(alloc: Allocator) !Self {
+        return Self{
             .buf = try alloc.alloc(u8, 0x400),
             .alloc = alloc,
         };
     }
 
-    fn deinit(self: @This()) void {
+    fn deinit(self: Self) void {
         self.alloc.free(self.buf);
     }
 
-    pub inline fn get32(self: *const @This(), idx: usize) u32 {
+    pub inline fn get32(self: *const Self, idx: usize) u32 {
         return (@as(u32, self.get16(idx + 2)) << 16) | @as(u32, self.get16(idx));
     }
 
-    pub inline fn set32(self: *@This(), idx: usize, word: u32) void {
+    pub inline fn set32(self: *Self, idx: usize, word: u32) void {
         self.set16(idx + 2, @truncate(u16, word >> 16));
         self.set16(idx, @truncate(u16, word));
     }
 
-    pub inline fn get16(self: *const @This(), idx: usize) u16 {
+    pub inline fn get16(self: *const Self, idx: usize) u16 {
         return (@as(u16, self.buf[idx + 1]) << 8) | @as(u16, self.buf[idx]);
     }
 
-    pub inline fn set16(self: *@This(), idx: usize, halfword: u16) void {
+    pub inline fn set16(self: *Self, idx: usize, halfword: u16) void {
         self.buf[idx + 1] = @truncate(u8, halfword >> 8);
         self.buf[idx] = @truncate(u8, halfword);
     }
 
-    pub inline fn get8(self: *const @This(), idx: usize) u8 {
+    pub inline fn get8(self: *const Self, idx: usize) u8 {
         return self.buf[idx];
     }
 };
 
 const Vram = struct {
+    const Self = @This();
+
     buf: []u8,
     alloc: Allocator,
 
-    fn init(alloc: Allocator) !@This() {
-        return @This(){
+    fn init(alloc: Allocator) !Self {
+        return Self{
             .buf = try alloc.alloc(u8, 0x18000),
             .alloc = alloc,
         };
     }
 
-    fn deinit(self: @This()) void {
+    fn deinit(self: Self) void {
         self.alloc.free(self.buf);
     }
 
-    pub inline fn get32(self: *const @This(), idx: usize) u32 {
+    pub inline fn get32(self: *const Self, idx: usize) u32 {
         return (@as(u32, self.get16(idx + 2)) << 16) | @as(u32, self.get16(idx));
     }
 
-    pub inline fn set32(self: *@This(), idx: usize, word: u32) void {
+    pub inline fn set32(self: *Self, idx: usize, word: u32) void {
         self.set16(idx + 2, @truncate(u16, word >> 16));
         self.set16(idx, @truncate(u16, word));
     }
 
-    pub inline fn get16(self: *const @This(), idx: usize) u16 {
+    pub inline fn get16(self: *const Self, idx: usize) u16 {
         return (@as(u16, self.buf[idx + 1]) << 8) | @as(u16, self.buf[idx]);
     }
 
-    pub inline fn set16(self: *@This(), idx: usize, halfword: u16) void {
+    pub inline fn set16(self: *Self, idx: usize, halfword: u16) void {
         self.buf[idx + 1] = @truncate(u8, halfword >> 8);
         self.buf[idx] = @truncate(u8, halfword);
     }
 
-    pub inline fn get8(self: *const @This(), idx: usize) u8 {
+    pub inline fn get8(self: *const Self, idx: usize) u8 {
         return self.buf[idx];
     }
 };