extract imgui setup

src/main.zig

@@ -5,10 +5,10 @@ const shaders = @import("shaders");
 const Allocator = std.mem.Allocator;
 
 const au = @import("au.zig");
-const im = @import("cimgui");
-
 const Uber = @import("Uber.zig");
 
+const ui = @import("au/ui.zig");
+
 const vertices = [_]Uber.Vertex{
     // Vulkan depth range is 0, 1 instead of OpenGL -1, 1
     .{ .pos = .{ -0.5, -0.5, -0.5, 1.0 }, .color = .{ 1, 0, 0 } },
@@ -69,14 +69,22 @@ pub fn main() !void {
     try au.init(alloc);
     defer au.deinit();
 
+    {
+        const props = au.I.getPhysicalDeviceProperties(au.device_config.pdev);
+        std.debug.print(
+            "Selected Device:\n  {s}\n  mode: {}\n",
+            .{ props.device_name, au.device_config.mode },
+        );
+    }
+
     var sc = try au.SwapChain.init(alloc);
     defer sc.deinit();
 
     var flights = try au.Flights.init(alloc, 3); // FRAMES IN FLIGHT
     defer flights.deinit();
 
-    const ctx = im.c.igCreateContext(null) orelse return error.igCreateContextFailed;
-    defer im.c.igDestroyContext(ctx);
+    const ctx = try ui.init(flights.flights.len);
+    defer ui.deinit(ctx);
 
     const descriptorPool = try au.D.createDescriptorPool(&vk.DescriptorPoolCreateInfo{
         .flags = .{ .free_descriptor_set_bit = true },
@@ -88,41 +96,8 @@ pub fn main() !void {
     }, null);
     defer au.D.destroyDescriptorPool(descriptorPool, null);
 
-    _ = im.c.ImGui_ImplVulkan_LoadFunctions(loader_wrapper, null);
-    _ = im.c.ImGui_ImplGlfw_InitForVulkan(@ptrCast(au.W.handle), true);
-    defer im.c.ImGui_ImplGlfw_Shutdown();
-
     _ = try sc.rebuild();
 
-    const prci: vk.PipelineRenderingCreateInfo = .{
-        .view_mask = 0,
-        .depth_attachment_format = .undefined,
-        .stencil_attachment_format = .undefined,
-        .color_attachment_count = 1,
-        .p_color_attachment_formats = &.{au.device_config.format.format},
-    };
-
-    var info: im.c.ImGui_ImplVulkan_InitInfo = .{
-        .Instance = @ptrFromInt(@intFromEnum(au.I.handle)),
-        .PhysicalDevice = @ptrFromInt(@intFromEnum(au.device_config.pdev)),
-        .Device = @ptrFromInt(@intFromEnum(au.D.handle)),
-        .QueueFamily = au.device_config.family,
-        .Queue = @ptrFromInt(@intFromEnum(au.Q.handle)),
-        .DescriptorPool = @ptrFromInt(@intFromEnum(descriptorPool)),
-        .RenderPass = null,
-        .MinImageCount = 2,
-        .ImageCount = @intCast(flights.flights.len),
-        .PipelineRenderingCreateInfo = @bitCast(prci),
-        .MSAASamples = 0,
-        .PipelineCache = null,
-        .Subpass = 0,
-        .UseDynamicRendering = true,
-        .Allocator = null,
-    };
-    _ = im.c.ImGui_ImplVulkan_Init(&info);
-    _ = im.c.ImGui_ImplVulkan_CreateFontsTexture();
-    defer im.c.ImGui_ImplVulkan_Shutdown();
-
     const cache = try au.D.createPipelineCache(&vk.PipelineCacheCreateInfo{}, null);
     defer au.D.destroyPipelineCache(cache, null);
 
@@ -130,6 +105,7 @@ pub fn main() !void {
     defer uber.deinit();
 
     const vkalloc = au.VkAllocator.init();
+    std.debug.print("heaps: {any}\ntypes: {any}\n", .{ vkalloc.heaps(), vkalloc.types() });
 
     const vertex_buffer = try au.D.createBuffer(&vk.BufferCreateInfo{
         .size = @sizeOf(@TypeOf(vertices)),
@@ -220,12 +196,9 @@ pub fn main() !void {
     const rand = prng.random();
 
     while (!au.W.should_close()) {
-        im.c.ImGui_ImplGlfw_NewFrame();
-        im.c.ImGui_ImplVulkan_NewFrame();
-        im.c.igNewFrame();
-        im.c.igShowDemoWindow(null);
-        im.c.igEndFrame();
-        im.c.igRender();
+        ui.NewFrame();
+        ui.igShowMetricsWindow(null);
+        ui.EndFrame();
 
         const flight = flights.next();
 
@@ -267,7 +240,7 @@ pub fn main() !void {
             index_buffer,
             descriptorSet,
         );
-        im.c.ImGui_ImplVulkan_RenderDrawData(im.c.igGetDrawData(), @ptrFromInt(@intFromEnum(cmd.handle)), null);
+        ui.Draw(cmd);
         tgt.end_rendering(cmd);
 
         for (vertex_data) |*v| {