- Restored removed functions

- Restored pNext chain to device (appends to the end of the ExtentionFeatures chain)
- Style changes
- Migrated ExtensionFeatures into detail

src/VkBootstrap.cpp

@@ -846,8 +846,8 @@ std::vector<const char*> check_device_extension_support(
 // clang-format off
 bool supports_features(VkPhysicalDeviceFeatures supported,
                        VkPhysicalDeviceFeatures requested,
-                       const std::vector<ExtensionFeatures>& extension_supported,
+                       std::vector<ExtensionFeatures> const& extension_supported,
-                       const std::vector<ExtensionFeatures>& extension_requested) {
+                       std::vector<ExtensionFeatures> const& extension_requested) {
     if (requested.robustBufferAccess && !supported.robustBufferAccess) return false;
     if (requested.fullDrawIndexUint32 && !supported.fullDrawIndexUint32) return false;
     if (requested.imageCubeArray && !supported.imageCubeArray) return false;
@@ -992,7 +992,7 @@ uint32_t get_present_queue_index(VkPhysicalDevice const phys_device,
 
 PhysicalDeviceSelector::PhysicalDeviceDesc PhysicalDeviceSelector::populate_device_details(
     uint32_t instance_version, VkPhysicalDevice phys_device,
-    std::vector<ExtensionFeatures> extension_features_as_template) const {
+    std::vector<detail::ExtensionFeatures> extension_features_as_template) const {
 	PhysicalDeviceSelector::PhysicalDeviceDesc desc{};
 	desc.phys_device = phys_device;
 	auto queue_families = detail::get_vector_noerror<VkQueueFamilyProperties>(
@@ -1007,7 +1007,7 @@ PhysicalDeviceSelector::PhysicalDeviceDesc PhysicalDeviceSelector::populate_devi
 	desc.device_features2.sType = VK_STRUCTURE_TYPE_PHYSICAL_DEVICE_FEATURES_2;
     desc.extension_features = extension_features_as_template;
     if (instance_version >= VK_API_VERSION_1_1) {
-        ExtensionFeatures* prev = nullptr;
+		detail::ExtensionFeatures* prev = nullptr;
         for(auto& extension : desc.extension_features) {
             if(prev != nullptr) {
                 prev->structure->pNext = extension.structure;
@@ -1260,12 +1260,12 @@ PhysicalDeviceSelector& PhysicalDeviceSelector::set_desired_version(uint32_t maj
 // Just calls add_required_features
 PhysicalDeviceSelector& PhysicalDeviceSelector::set_required_features_11(
     VkPhysicalDeviceVulkan11Features const& features_11) {
-    add_required_features(features_11);
+    add_required_extension_features(features_11);
     return *this;
 }
 PhysicalDeviceSelector& PhysicalDeviceSelector::set_required_features_12(
     VkPhysicalDeviceVulkan12Features const& features_12) {
-    add_required_features(features_12);
+	add_required_extension_features(features_12);
     return *this;
 }
 #endif
@@ -1401,21 +1401,24 @@ detail::Result<Device> DeviceBuilder::build() const {
 
     bool has_phys_dev_features_2 = false;
 
-// Setup the pNexts of all the extension features
 #if defined(VK_API_VERSION_1_1)
+	// Setup the pNexts of all the extension features
+	std::vector<detail::ExtensionFeatures> match = physical_device.extension_features;
     VkPhysicalDeviceFeatures2 local_features2{};
+	VkBaseOutStructure* tail = nullptr;
     if (physical_device.instance_version >= VK_MAKE_VERSION(1, 1, 0) &&
-        physical_device.extension_features.size() > 0) {
+		match.size() > 0) {
-        ExtensionFeatures* prev = nullptr;
+		detail::ExtensionFeatures* prev = nullptr;
-        for(auto& extension : physical_device.extension_features) {
+        for(auto& extension : match) {
             if(prev != nullptr) {
                 prev->structure->pNext = extension.structure;
             }
             prev = &extension;
+			tail = prev->structure;
         }
         local_features2.sType = VK_STRUCTURE_TYPE_PHYSICAL_DEVICE_FEATURES_2;
         local_features2.features = physical_device.features;
-        local_features2.pNext = physical_device.extension_features[0].structure;
+        local_features2.pNext = match.front().structure;
         has_phys_dev_features_2 = true;
     }
 #endif
@@ -1427,19 +1430,31 @@ detail::Result<Device> DeviceBuilder::build() const {
 	device_create_info.pQueueCreateInfos = queueCreateInfos.data();
 	device_create_info.enabledExtensionCount = static_cast<uint32_t>(extensions.size());
 	device_create_info.ppEnabledExtensionNames = extensions.data();
+
+	detail::setup_pNext_chain(device_create_info, info.pNext_chain);
+
+#if defined(VK_API_VERSION_1_1)
 	// VUID-VkDeviceCreateInfo-pNext-00373 - don't add pEnabledFeatures if the phys_dev_features_2 is present
-    if (!has_phys_dev_features_2) {
+    if (has_phys_dev_features_2) {
-        device_create_info.pEnabledFeatures = &physical_device.features;
-    } else {
         device_create_info.pNext = &local_features2;
+		if(info.pNext_chain.size() > 0) {
+			match.back().structure->pNext = info.pNext_chain.front();
 		}
+    } else {
+		device_create_info.pEnabledFeatures = &physical_device.features;
+	}
+#else
+	device_create_info.pEnabledFeatures = &physical_device.features;
+#endif
 
 	Device device;
+
 	VkResult res = detail::vulkan_functions().fp_vkCreateDevice(
 	    physical_device.physical_device, &device_create_info, info.allocation_callbacks, &device.device);
 	if (res != VK_SUCCESS) {
 		return { DeviceError::failed_create_device, res };
 	}
+
 	device.physical_device = physical_device;
 	device.surface = physical_device.surface;
 	device.queue_families = physical_device.queue_families;

src/VkBootstrap.h

@@ -115,86 +115,6 @@ template <typename T> class Result {
 	bool m_init;
 };
 
-} // namespace detail
-
-enum class InstanceError {
-	vulkan_unavailable,
-	vulkan_version_unavailable,
-	vulkan_version_1_1_unavailable,
-	vulkan_version_1_2_unavailable,
-	failed_create_instance,
-	failed_create_debug_messenger,
-	requested_layers_not_present,
-	requested_extensions_not_present,
-	windowing_extensions_not_present,
-};
-enum class PhysicalDeviceError {
-	no_surface_provided,
-	failed_enumerate_physical_devices,
-	no_physical_devices_found,
-	no_suitable_device,
-};
-enum class QueueError {
-	present_unavailable,
-	graphics_unavailable,
-	compute_unavailable,
-	transfer_unavailable,
-	queue_index_out_of_range,
-	invalid_queue_family_index
-};
-enum class DeviceError {
-	failed_create_device,
-};
-enum class SwapchainError {
-	surface_handle_not_provided,
-	failed_query_surface_support_details,
-	failed_create_swapchain,
-	failed_get_swapchain_images,
-	failed_create_swapchain_image_views,
-};
-
-std::error_code make_error_code(InstanceError instance_error);
-std::error_code make_error_code(PhysicalDeviceError physical_device_error);
-std::error_code make_error_code(QueueError queue_error);
-std::error_code make_error_code(DeviceError device_error);
-std::error_code make_error_code(SwapchainError swapchain_error);
-
-const char* to_string_message_severity(VkDebugUtilsMessageSeverityFlagBitsEXT s);
-const char* to_string_message_type(VkDebugUtilsMessageTypeFlagsEXT s);
-
-const char* to_string(InstanceError err);
-const char* to_string(PhysicalDeviceError err);
-const char* to_string(QueueError err);
-const char* to_string(DeviceError err);
-const char* to_string(SwapchainError err);
-
-// Gathers useful information about the available vulkan capabilities, like layers and instance
-// extensions. Use this for enabling features conditionally, ie if you would like an extension but
-// can use a fallback if it isn't supported but need to know if support is available first.
-struct SystemInfo {
-	private:
-	SystemInfo();
-
-	public:
-	// Use get_system_info to create a SystemInfo struct. This is because loading vulkan could fail.
-	static detail::Result<SystemInfo> get_system_info();
-	static detail::Result<SystemInfo> get_system_info(PFN_vkGetInstanceProcAddr fp_vkGetInstanceProcAddr);
-
-	// Returns true if a layer is available
-	bool is_layer_available(const char* layer_name) const;
-	// Returns true if an extension is available
-	bool is_extension_available(const char* extension_name) const;
-
-	std::vector<VkLayerProperties> available_layers;
-	std::vector<VkExtensionProperties> available_extensions;
-	bool validation_layers_available = false;
-	bool debug_utils_available = false;
-};
-
-
-class InstanceBuilder;
-class PhysicalDeviceSelector;
-
 struct ExtensionFeatures {
 
     using DeleteProc = void(*)(ExtensionFeatures&);
@@ -313,6 +233,86 @@ struct ExtensionFeatures {
     CopyProc copy_proc = nullptr;
 };
 
+} // namespace detail
+
+enum class InstanceError {
+	vulkan_unavailable,
+	vulkan_version_unavailable,
+	vulkan_version_1_1_unavailable,
+	vulkan_version_1_2_unavailable,
+	failed_create_instance,
+	failed_create_debug_messenger,
+	requested_layers_not_present,
+	requested_extensions_not_present,
+	windowing_extensions_not_present,
+};
+enum class PhysicalDeviceError {
+	no_surface_provided,
+	failed_enumerate_physical_devices,
+	no_physical_devices_found,
+	no_suitable_device,
+};
+enum class QueueError {
+	present_unavailable,
+	graphics_unavailable,
+	compute_unavailable,
+	transfer_unavailable,
+	queue_index_out_of_range,
+	invalid_queue_family_index
+};
+enum class DeviceError {
+	failed_create_device,
+};
+enum class SwapchainError {
+	surface_handle_not_provided,
+	failed_query_surface_support_details,
+	failed_create_swapchain,
+	failed_get_swapchain_images,
+	failed_create_swapchain_image_views,
+};
+
+std::error_code make_error_code(InstanceError instance_error);
+std::error_code make_error_code(PhysicalDeviceError physical_device_error);
+std::error_code make_error_code(QueueError queue_error);
+std::error_code make_error_code(DeviceError device_error);
+std::error_code make_error_code(SwapchainError swapchain_error);
+
+const char* to_string_message_severity(VkDebugUtilsMessageSeverityFlagBitsEXT s);
+const char* to_string_message_type(VkDebugUtilsMessageTypeFlagsEXT s);
+
+const char* to_string(InstanceError err);
+const char* to_string(PhysicalDeviceError err);
+const char* to_string(QueueError err);
+const char* to_string(DeviceError err);
+const char* to_string(SwapchainError err);
+
+// Gathers useful information about the available vulkan capabilities, like layers and instance
+// extensions. Use this for enabling features conditionally, ie if you would like an extension but
+// can use a fallback if it isn't supported but need to know if support is available first.
+struct SystemInfo {
+	private:
+	SystemInfo();
+
+	public:
+	// Use get_system_info to create a SystemInfo struct. This is because loading vulkan could fail.
+	static detail::Result<SystemInfo> get_system_info();
+	static detail::Result<SystemInfo> get_system_info(PFN_vkGetInstanceProcAddr fp_vkGetInstanceProcAddr);
+
+	// Returns true if a layer is available
+	bool is_layer_available(const char* layer_name) const;
+	// Returns true if an extension is available
+	bool is_extension_available(const char* extension_name) const;
+
+	std::vector<VkLayerProperties> available_layers;
+	std::vector<VkExtensionProperties> available_extensions;
+	bool validation_layers_available = false;
+	bool debug_utils_available = false;
+};
+
+
+class InstanceBuilder;
+class PhysicalDeviceSelector;
+
 struct Instance {
 	VkInstance instance = VK_NULL_HANDLE;
 	VkDebugUtilsMessengerEXT debug_messenger = VK_NULL_HANDLE;
@@ -473,7 +473,7 @@ struct PhysicalDevice {
 	uint32_t instance_version = VK_MAKE_VERSION(1, 0, 0);
 	std::vector<const char*> extensions_to_enable;
 	std::vector<VkQueueFamilyProperties> queue_families;
-    mutable std::vector<ExtensionFeatures> extension_features;
+    std::vector<detail::ExtensionFeatures> extension_features;
 	bool defer_surface_initialization = false;
 	friend class PhysicalDeviceSelector;
 	friend class DeviceBuilder;
@@ -535,15 +535,14 @@ class PhysicalDeviceSelector {
 	PhysicalDeviceSelector& set_minimum_version(uint32_t major, uint32_t minor);
 
 	// Require a physical device which supports a specific set of general/extension features.
-    template <typename T>
-    PhysicalDeviceSelector& add_required_features(T const& features) {
 #if defined(VK_API_VERSION_1_1)
-        criteria.extension_features.push_back(ExtensionFeatures::make(features));
+    template <typename T>
-#endif
+    PhysicalDeviceSelector& add_required_extension_features(T const& features) {
+        criteria.extension_features.push_back(detail::ExtensionFeatures::make(features));
         return *this;
     }
-    template<>
+#endif
-    PhysicalDeviceSelector& add_required_features<VkPhysicalDeviceFeatures>(VkPhysicalDeviceFeatures const& features) {
+    PhysicalDeviceSelector& set_required_features(VkPhysicalDeviceFeatures const& features) {
         criteria.required_features = features;
         return *this;
     }
@@ -581,7 +580,7 @@ class PhysicalDeviceSelector {
 		VkPhysicalDeviceMemoryProperties mem_properties{};
 #if defined(VK_API_VERSION_1_1)
 		VkPhysicalDeviceFeatures2 device_features2{};
-        std::vector<ExtensionFeatures> extension_features;
+        std::vector<detail::ExtensionFeatures> extension_features;
 #endif
 	};
 
@@ -590,7 +589,7 @@ class PhysicalDeviceSelector {
 
     PhysicalDeviceDesc populate_device_details(uint32_t instance_version,
                                                VkPhysicalDevice phys_device,
-                                               std::vector<ExtensionFeatures> extension_features_as_template) const;
+                                               std::vector<detail::ExtensionFeatures> extension_features_as_template) const;
 
 	struct SelectionCriteria {
 		PreferredDeviceType preferred_type = PreferredDeviceType::discrete;
@@ -612,7 +611,7 @@ class PhysicalDeviceSelector {
 		VkPhysicalDeviceFeatures required_features{};
 #if defined(VK_API_VERSION_1_1)
 		VkPhysicalDeviceFeatures2 required_features2{};
-        std::vector<ExtensionFeatures> extension_features;
+        std::vector<detail::ExtensionFeatures> extension_features;
 #endif
 		bool defer_surface_initialization = false;
 		bool use_first_gpu_unconditionally = false;
@@ -670,6 +669,13 @@ class DeviceBuilder {
 	// If a custom queue setup is provided, getting the queues and queue indexes is up to the application.
 	DeviceBuilder& custom_queue_setup(std::vector<CustomQueueDescription> queue_descriptions);
 
+	// Add a structure to the pNext chain of VkDeviceCreateInfo.
+	// The structure must be valid when DeviceBuilder::build() is called.
+	template <typename T> DeviceBuilder& add_pNext(T* structure) {
+		info.pNext_chain.push_back(reinterpret_cast<VkBaseOutStructure*>(structure));
+		return *this;
+	}
+
 	// Provide custom allocation callbacks.
 	DeviceBuilder& set_allocation_callbacks(VkAllocationCallbacks* callbacks);
 
@@ -677,6 +683,7 @@ class DeviceBuilder {
 	PhysicalDevice physical_device;
 	struct DeviceInfo {
 		VkDeviceCreateFlags flags = 0;
+		std::vector<VkBaseOutStructure*> pNext_chain;
 		std::vector<CustomQueueDescription> queue_descriptions;
 		VkAllocationCallbacks* allocation_callbacks = VK_NULL_HANDLE;
 	} info;

tests/bootstrap_tests.cpp

@@ -411,6 +411,38 @@ TEST_CASE("ReLoading Vulkan Manually", "[VkBootstrap.loading]") {
 	}
 }
 
+#if defined(VK_API_VERSION_1_1)
+TEST_CASE("Querying Required Extension Features", "[VkBootstrap.version]") {
+	GIVEN("A working instance") {
+		vkb::InstanceBuilder builder;
+
+		auto instance_ret =
+			builder.request_validation_layers().require_api_version(1, 2).set_headless().build();
+		REQUIRE(instance_ret.has_value());
+		// Requires a device that supports runtime descriptor arrays via descriptor indexing extension.
+		{
+			VkPhysicalDeviceDescriptorIndexingFeaturesEXT descriptor_indexing_features{};
+			descriptor_indexing_features.sType	= VK_STRUCTURE_TYPE_PHYSICAL_DEVICE_DESCRIPTOR_INDEXING_FEATURES_EXT;
+			descriptor_indexing_features.runtimeDescriptorArray = true;
+
+			vkb::PhysicalDeviceSelector selector(instance_ret.value());
+			auto phys_dev_ret =
+				selector.add_required_extension(VK_EXT_DESCRIPTOR_INDEXING_EXTENSION_NAME).
+			    add_required_extension_features(descriptor_indexing_features).select();
+			// Ignore if hardware support isn't true
+			REQUIRE(phys_dev_ret.has_value());
+
+			vkb::DeviceBuilder device_builder(phys_dev_ret.value());
+			auto device_ret = device_builder.build();
+			REQUIRE(device_ret.has_value());
+			vkb::destroy_device(device_ret.value());
+		}
+		vkb::destroy_instance(instance_ret.value());
+	}
+}
+
+#endif
+
 #if defined(VK_API_VERSION_1_2)
 TEST_CASE("Querying Vulkan 1.1 and 1.2 features", "[VkBootstrap.version]") {
 	GIVEN("A working instance") {