Feature checking at instance.zig | ImGui example README.md

examples/imgui/README.md

@@ -0,0 +1,6 @@
+# ImGui Example
+
+![simple](image.png)
+
+Used dear_bindings with docking imgui branch
+https://mrscriptx.github.io/devlog/zig/2025/04/30/zig-linking-dear-imgui.html

examples/imgui/imgui.zig

@@ -45,9 +45,7 @@ pub fn main(init: std.process.Init) !void {
 
     // --- # ---
     const instance = try gfx.makeInstance(.{
-        .vulkan = .{
-            .api_version = .v1_3,
-        },
+        .vulkan = .{},
     });
 
     const surface = try gfx.makeSurface(.{
@@ -58,7 +56,7 @@ pub fn main(init: std.process.Init) !void {
     }, instance);
 
     const adapter = try gfx.makeAdapter(.{}, instance);
-    const device = try gfx.makeDevice(adapter, surface);
+    const device = try gfx.makeDevice(instance, adapter, surface);
     const swapchain = try gfx.makeSwapchain(adapter, device, surface);
 
     //

examples/simple/simple.zig

@@ -48,6 +48,9 @@ pub fn main(init: std.process.Init) !void {
     const instance = try gfx.makeInstance(.{
         .vulkan = .{
             .api_version = .v1_3,
+            .vk_14_features = .{
+                .dynamic_rendering_local_read = false,
+            },
         },
     });
 
@@ -59,7 +62,7 @@ pub fn main(init: std.process.Init) !void {
     }, instance);
 
     const adapter = try gfx.makeAdapter(.{}, instance);
-    const device = try gfx.makeDevice(adapter, surface);
+    const device = try gfx.makeDevice(instance, adapter, surface);
     const swapchain = try gfx.makeSwapchain(adapter, device, surface);
 
     // --- TEXTURES ---

src/gfx.zig

@@ -208,11 +208,12 @@ pub fn getRawAdapter(self: *Self, adapter: Handle(Adapter)) !RawAdapter {
 /// ----------------------------------------------------
 pub fn makeDevice(
     self: *Self,
+    instance: Handle(Instance),
     adapter: Handle(Adapter),
     surface: Handle(Surface),
 ) !Handle(Device) {
     return try switch ((try self.getBackend()).*) {
-        .vulkan => |*v| v.makeDevice(adapter, surface),
+        .vulkan => |*v| v.makeDevice(instance, adapter, surface),
     };
 }
 

src/rhi/common.zig

@@ -27,7 +27,7 @@ pub const VK13Features = struct {
 };
 
 pub const VK14Features = struct {
-    dynamic_rendering_local_read: bool = true,
+    dynamic_rendering_local_read: bool = false,
 };
 
 pub const DeviceType = enum {

src/rhi/vulkan/resource/device.zig

@@ -4,10 +4,12 @@
 
 const std = @import("std");
 const vk = @import("vulkan");
-const Adapter = @import("adapter.zig");
-const Surface = @import("surface.zig");
 const Self = @This();
 
+const Instance = @import("instance.zig");
+const Surface = @import("surface.zig");
+const Adapter = @import("adapter.zig");
+
 /// ----------------------------------------------------
 /// ----------------------------------------------------
 pub const QueueFamilies = struct {
@@ -28,19 +30,41 @@ graphics_command_pool: *vk.VkCommandPool_T,
 /// ----------------------------------------------------
 /// ----------------------------------------------------
 pub fn init(
-    adapter: *Adapter,
-    surface: *Surface,
+    instance: *const Instance,
+    adapter: *const Adapter,
+    surface: *const Surface,
     alloc: std.mem.Allocator,
 ) !Self {
-    // --- # ---
     const extensions: []const [*:0]const u8 = &.{
         "VK_KHR_swapchain",
     };
 
-    // --- # ---
+    var features14: vk.VkPhysicalDeviceVulkan14Features = .{
+        .sType = vk.VK_STRUCTURE_TYPE_PHYSICAL_DEVICE_VULKAN_1_4_FEATURES,
+        .dynamicRenderingLocalRead = @intFromBool(instance.vk_14_features.dynamic_rendering_local_read),
+    };
+
     var features13: vk.VkPhysicalDeviceVulkan13Features = .{
         .sType = vk.VK_STRUCTURE_TYPE_PHYSICAL_DEVICE_VULKAN_1_3_FEATURES,
-        .dynamicRendering = vk.VK_TRUE,
+        .dynamicRendering = @intFromBool(instance.vk_13_features.dynamic_rendering),
+        .synchronization2 = @intFromBool(instance.vk_13_features.synchronization2),
+        .pNext = &features14,
+    };
+
+    var features12: vk.VkPhysicalDeviceVulkan12Features = .{
+        .sType = vk.VK_STRUCTURE_TYPE_PHYSICAL_DEVICE_VULKAN_1_2_FEATURES,
+        .pNext = &features13,
+    };
+
+    var features11: vk.VkPhysicalDeviceVulkan11Features = .{
+        .sType = vk.VK_STRUCTURE_TYPE_PHYSICAL_DEVICE_VULKAN_1_1_FEATURES,
+        .shaderDrawParameters = @intFromBool(instance.vk_11_features.shader_draw_parameters),
+        .pNext = &features12,
+    };
+
+    var features: vk.VkPhysicalDeviceFeatures2 = .{
+        .sType = vk.VK_STRUCTURE_TYPE_PHYSICAL_DEVICE_FEATURES_2,
+        .pNext = &features11,
     };
 
     // --- FIND QUEUE FAMILIES ---
@@ -73,15 +97,13 @@ pub fn init(
     }
 
     // --- DEVICE CREATE INFO ---
-    var features: vk.VkPhysicalDeviceFeatures = .{};
     var create_info: vk.VkDeviceCreateInfo = .{
         .sType = vk.VK_STRUCTURE_TYPE_DEVICE_CREATE_INFO,
         .pQueueCreateInfos = &queue_create_infos,
         .queueCreateInfoCount = queue_create_info_count,
-        .pEnabledFeatures = &features,
         .enabledExtensionCount = extensions.len,
         .ppEnabledExtensionNames = extensions.ptr,
-        .pNext = &features13,
+        .pNext = &features,
     };
 
     // --- # ---

src/rhi/vulkan/resource/instance.zig

@@ -26,6 +26,24 @@ vk_14_features: cmn.VK14Features,
 /// ----------------------------------------------------
 /// ----------------------------------------------------
 pub fn init(config: cmn.VKInstanceConfig, alloc: std.mem.Allocator) !Self {
+    // --- ENSURE CORRECT FEATURES ---
+    switch (config.api_version) {
+        .v1_0, .v1_1, .v1_2 => {
+            if (config.vk_14_features.dynamic_rendering_local_read or
+                config.vk_13_features.dynamic_rendering or
+                config.vk_13_features.synchronization2)
+            {
+                return error.FeatureNotSupported;
+            }
+        },
+        .v1_3 => {
+            if (config.vk_14_features.dynamic_rendering_local_read) {
+                return error.FeatureNotSupported;
+            }
+        },
+        .v1_4 => {},
+    }
+
     const validation_layers: []const [*:0]const u8 = &.{
         "VK_LAYER_KHRONOS_validation",
     };

src/rhi/vulkan/vulkan.zig

@@ -206,12 +206,14 @@ pub fn getRawAdapter(self: *Self, adapter: Handle(Adapter)) !*vk.VkPhysicalDevic
 /// ----------------------------------------------------
 pub fn makeDevice(
     self: *Self,
+    instance: Handle(common.Instance),
     adapter: Handle(Adapter),
     surface: Handle(Surface),
 ) !Handle(Device) {
+    const raw_instance = self.resource.instances.get(instance) orelse return error.InstanceNotFound;
     const raw_adapter = self.resource.adapters.get(adapter) orelse return error.AdapterNotFound;
     const raw_surface = self.resource.surfaces.get(surface) orelse return error.SurfaceNotFound;
-    return try self.resource.devices.put(try .init(raw_adapter, raw_surface, self.alloc));
+    return try self.resource.devices.put(try .init(raw_instance, raw_adapter, raw_surface, self.alloc));
 }
 
 /// ----------------------------------------------------