extract generic au.Flights

src/main.zig

@@ -50,13 +50,6 @@ const vertices = [_]Vertex{
 
 const indices = [_]Index{ 4, 5, 6, 6, 5, 7 };
 
-const Flight = struct {
-    acquire: vk.Semaphore = .null_handle,
-    complete: vk.Semaphore = .null_handle,
-    fence: vk.Fence = .null_handle,
-    pool: vk.CommandPool = .null_handle,
-    frame: Frame,
-};
 
 const Frame = struct {
     pub fn init() !Frame {
@@ -181,27 +174,11 @@ pub fn main() !void {
     var sc = try au.SwapChain.init(alloc);
     defer sc.deinit();
 
-    const flights = try alloc.alloc(Flight, 3); // FRAMES IN FLIGHT
-    defer alloc.free(flights);
+    var flights = try au.Flights(Frame).init(alloc, 3); // FRAMES IN FLIGHT
+    defer flights.deinit();
 
-    for (flights) |*flight| {
-        flight.acquire = try au.D.createSemaphore(&.{}, null);
-        flight.complete = try au.D.createSemaphore(&.{}, null);
-        flight.fence = try au.D.createFence(&.{ .flags = .{ .signaled_bit = true } }, null);
-        flight.pool = try au.D.createCommandPool(&.{ .queue_family_index = au.device_config.family }, null);
-        flight.frame = try Frame.init();
-    }
-    defer for (flights) |flight| {
-        au.D.destroySemaphore(flight.acquire, null);
-        au.D.destroySemaphore(flight.complete, null);
-        au.D.destroyFence(flight.fence, null);
-        au.D.destroyCommandPool(flight.pool, null);
-        flight.frame.deinit();
-    };
-
-    var flight_idx: usize = 0;
-    while (!au.W.should_close()) : (flight_idx = (flight_idx + 1) % flights.len) {
-        const flight = flights[flight_idx];
+    while (!au.W.should_close()) {
+        const flight = flights.next();
 
         const events = if (au.W.focused())
             au.wait_events_timeout(0.1)
@@ -243,7 +220,7 @@ pub fn main() !void {
 
         try render_cmd.beginCommandBuffer(&.{ .flags = .{ .one_time_submit_bit = true } });
 
-        try flight.frame.record_render(
+        try flight.ctx.record_render(
             render_cmd,
             image,
             view,