VkQueueFamilyProperties2

VkQueueFamilyProperties is a structure in the Vulkan graphics API that describes the capabilities of a particular queue family on a physical Vulkan device. A queue family is a group of queues that all support the same set of commands. Each queue family has specific properties that indicate what kind of operations it can perform.

The VkQueueFamilyProperties structure contains several members. The queueCount member indicates the number of queues available within that family. The supportedQueueFlags member is a bitmask that specifies the types of operations supported by the queues in this family. These flags can include VK_QUEUE_GRAPHICS_BIT for graphics operations, VK_QUEUE_COMPUTE_BIT for compute operations, VK_QUEUE_TRANSFER_BIT for transfer operations, and VK_QUEUE_SPARSE_BINDING_BIT for sparse resource binding. The timestampValidBits member indicates the number of bits of precision available for timestamps generated by queues in this family. The remaining members, if any, may be used for future extensions.

When querying for queue family properties, an application will typically iterate through all available queue families on a physical device using vkGetPhysicalDeviceQueueFamilyProperties. This allows the application to determine which queue families are suitable for its specific needs, such as performing graphics rendering, running compute shaders, or handling data transfers. Understanding these properties is crucial for efficient Vulkan application development, as it guides the selection of appropriate queues for different tasks.