VkDeviceCreateInfo

VkDeviceCreateInfo is a Vulkan structure used to describe the parameters for creating a logical device (VkDevice) from a physical device. It is passed to the function vkCreateDevice and determines which queues the application will have access to, which device extensions are enabled, and which features are activated for the device.

The sType member must be VK_STRUCTURE_TYPE_DEVICE_CREATE_INFO, and the pNext member is a pointer to a chain of extension-specific structures. This pNext chain is used to enable extended features beyond the core VkPhysicalDeviceFeatures, by attaching structures such as per-feature feature blocks. The flags field is reserved for future use.

Queue creation is specified by queueCreateInfoCount and pQueueCreateInfos. Each element describes a set of queues to create from a particular queue family, including the queueFamilyIndex, the number of queues to create, and a pointer to an array of queue priorities. These queues are the means by which an application submits commands to the device.

The enabledLayerCount and ppEnabledLayerNames fields historically allowed enabling validation layers at device creation; in modern usage, layers are managed at the instance level and this field is typically ignored. The enabledExtensionCount and ppEnabledExtensionNames fields specify device-level extensions to enable on the logical device, and pEnabledFeatures points to a VkPhysicalDeviceFeatures structure describing which core features to enable.

In practice, the requested queues, extensions, and features must be supported by the selected physical device. After validation, the application calls vkCreateDevice with the filled VkDeviceCreateInfo to obtain a VkDevice and access to the configured queues.