GUI: Box drawing

src/engine/Swapchain.zig

@@ -52,6 +52,7 @@ pub fn init(engine: *Engine) !Swapchain {
             },
         },
         .subpasses = &.{
+            // Main
             .{
                 .pipeline_bind_point = .graphics,
                 .color_attachments = &.{
@@ -65,6 +66,16 @@ pub fn init(engine: *Engine) !Swapchain {
                     .layout = .depth_stencil_attachment_optimal,
                 },
             },
+            // GUI
+            .{
+                .pipeline_bind_point = .graphics,
+                .color_attachments = &.{
+                    .{
+                        .attachment = 0,
+                        .layout = .color_attachment_optimal,
+                    },
+                },
+            },
         },
         .dependencies = &.{
             .{
@@ -89,6 +100,25 @@ pub fn init(engine: *Engine) !Swapchain {
                     .by_region_bit = true,
                 },
             },
+            .{
+                .src_subpass = 0,
+                .dst_subpass = 1,
+                .src_stage_mask = .{
+                    .color_attachment_output_bit = true,
+                },
+                .dst_stage_mask = .{
+                    .color_attachment_output_bit = true,
+                },
+                .src_access_mask = .{
+                    .color_attachment_write_bit = true,
+                },
+                .dst_access_mask = .{
+                    .color_attachment_write_bit = true,
+                },
+                .dependency_flags = .{
+                    .by_region_bit = true,
+                },
+            },
         },
     });
     errdefer engine.destroyRenderPass(render_pass);
@@ -129,6 +159,8 @@ pub fn deinit(self: *Swapchain, engine: *Engine) void {
 }
 
 pub fn recreate(self: *Swapchain, engine: *Engine) !void {
+    try engine.deviceWaitIdle(); // TODO LMAO
+
     const mode = &engine.mode.surface;
     const allocator = engine.vk_allocator.allocator;