feat: show throbber while win count is loading

src/main.zig

@@ -8,7 +8,6 @@ var context_global: *seizer.Context = undefined;
 var window_global: seizer.Window = undefined;
 var canvas: seizer.Canvas = undefined;
 var card_tilemap: ?DeckSprites = null;
-var invert_y: bool = false;
 
 var draw_pile: std.ArrayListUnmanaged(Card) = .{};
 var draw_pile_exhausted = false;
@@ -34,8 +33,9 @@ const MENU_ITEMS = [_][]const u8{
     "Quit",
 };
 
-var win_count: u32 = 0;
+var win_count: ?u32 = null;
 var win_triggered: bool = false;
+var frame_count: u64 = 0;
 
 pub fn init(context: *seizer.Context) !void {
     context_global = context;
@@ -52,8 +52,6 @@ pub fn init(context: *seizer.Context) !void {
     canvas = try seizer.Canvas.init(context.gpa, .{});
     errdefer canvas.deinit();
 
-    invert_y = std.mem.eql(u8, context.backend.name, "linux");
-
     card_tilemap = try assets.loadSolitaireCards(context.gpa);
 
     try resetGame();
@@ -138,7 +136,7 @@ fn onWinCountRead(userdata: ?*anyopaque, result: seizer.Context.FileError![]cons
     defer gpa.free(buffer);
 
     if (result) |bytes| {
-        if (bytes.len >= @sizeOf(@TypeOf(win_count))) {
+        if (bytes.len >= @sizeOf(u32)) {
             win_count = std.mem.readInt(u32, bytes[0..4], .little);
         }
     } else |_| {}
@@ -214,11 +212,11 @@ fn destroy(window: seizer.Window) void {
 }
 
 fn render(window: seizer.Window) !void {
-    if (haveWon() and !win_triggered) {
-        win_count += 1;
+    if (haveWon() and !win_triggered and win_count != null) {
+        win_count.? += 1;
 
         const win_count_write_buffer = try gpa.create(u32);
-        std.mem.writeInt(u32, std.mem.asBytes(win_count_write_buffer), win_count, .little);
+        std.mem.writeInt(u32, std.mem.asBytes(win_count_write_buffer), win_count.?, .little);
         context_global.writeFile(.{
             .appname = APPNAME,
             .path = "win_count.bin",
@@ -237,7 +235,6 @@ fn render(window: seizer.Window) !void {
     canvas.begin(.{
         .window_size = window.getSize(),
         .framebuffer_size = window.getFramebufferSize(),
-        .invert_y = invert_y,
     });
 
     const scale: u32 = if (canvas.window_size[1] <= 400) 1 else 2;
@@ -267,14 +264,35 @@ fn render(window: seizer.Window) !void {
         (canvas.window_size[1] - space_taken_by_board[1]) / 2,
     };
 
-    {
+    if (win_count) |w| {
         _ = canvas.printText(
             .{
                 canvas.window_size[0] - board_offset[0] - marginf - hand_offsetf[0],
                 board_offset[1] + marginf + hand_offsetf[1],
             },
             "Win Count: {}",
-            .{win_count},
+            .{w},
+            .{ .@"align" = .right, .scale = scalef },
+        );
+    } else {
+        const throbber_character: u8 = switch ((frame_count / 5) % 8) {
+            0 => '-',
+            1 => '\\',
+            2 => '|',
+            3 => '/',
+            4 => '-',
+            5 => '\\',
+            6 => '|',
+            7 => '/',
+            else => unreachable,
+        };
+        _ = canvas.printText(
+            .{
+                canvas.window_size[0] - board_offset[0] - marginf - hand_offsetf[0],
+                board_offset[1] + marginf + hand_offsetf[1],
+            },
+            "Win Count: [{c}]",
+            .{throbber_character},
             .{ .@"align" = .right, .scale = scalef },
         );
     }
@@ -432,6 +450,8 @@ fn render(window: seizer.Window) !void {
     }
 
     canvas.end();
+
+    frame_count +%= 1;
 }
 
 pub fn haveWon() bool {