feat: add option to specify custom device and instance layer structs

Author: Silverlan

include/misc/device_create_info.h

@@ -244,6 +244,8 @@ namespace Anvil
             return m_should_enable_shader_module_cache;
         }
 
+		const void *pNext = nullptr;
+
     private:
         /* Private type definitions */
         typedef struct QueueProperties

include/misc/instance_create_info.h

@@ -178,6 +178,8 @@ namespace Anvil
             m_is_mt_safe = in_is_mt_safe;
         }
 
+		const void *pNext = nullptr;
+
     private:
 
         /* Private functions */

src/wrappers/device.cpp

@@ -125,8 +125,8 @@ void Anvil::BaseDevice::create_device(const std::vector<const char*>& in_extensi
             create_info.enabledExtensionCount   = static_cast<uint32_t>(in_extensions.size() );
             create_info.enabledLayerCount       = static_cast<uint32_t>(in_layers.size    () );
             create_info.flags                   = 0;
-            create_info.pEnabledFeatures        = nullptr; /* chained */
             create_info.pNext                   = nullptr;
+            create_info.pEnabledFeatures        = nullptr; /* chained */
             create_info.ppEnabledExtensionNames = (in_extensions.size() > 0) ? &in_extensions[0] : nullptr;
             create_info.ppEnabledLayerNames     = (in_layers.size    () > 0) ? &in_layers    [0] : nullptr;
             create_info.pQueueCreateInfos       = nullptr; /* chained later */
@@ -307,6 +307,8 @@ void Anvil::BaseDevice::create_device(const std::vector<const char*>& in_extensi
     {
         auto struct_chain_ptr = struct_chainer.create_chain();
 
+		struct_chain_ptr->get_root_struct()->pNext = m_create_info_ptr->pNext;
+
         result = Anvil::Vulkan::vkCreateDevice(physical_device_ptrs.at(0)->get_physical_device(),
                                                struct_chain_ptr->get_root_struct(),
                                                nullptr, /* pAllocator */

src/wrappers/instance.cpp

@@ -683,7 +683,8 @@ bool Anvil::Instance::init()
         app_info.pNext              = nullptr;
         app_info.sType              = VK_STRUCTURE_TYPE_APPLICATION_INFO;
 
-		const VkLayerSettingsCreateInfoEXT layer_settings_create_info {VK_STRUCTURE_TYPE_LAYER_SETTINGS_CREATE_INFO_EXT, nullptr, layerSettings.size(), layerSettings.data()};
+		VkLayerSettingsCreateInfoEXT layer_settings_create_info {VK_STRUCTURE_TYPE_LAYER_SETTINGS_CREATE_INFO_EXT, nullptr, layerSettings.size(), layerSettings.data()};
+		layer_settings_create_info.pNext = m_create_info_ptr->pNext;
 
         create_info.enabledExtensionCount   = static_cast<uint32_t>(enabled_extensions_raw.size() );
         create_info.enabledLayerCount       = static_cast<uint32_t>(enabled_layers.size        () );