VkPhysicalDeviceBufferDeviceAddressFeaturesEXT(3)

# VkPhysicalDeviceBufferDeviceAddressFeaturesEXT(3) Manual Page

## Name

VkPhysicalDeviceBufferDeviceAddressFeaturesEXT - Structure describing buffer address features that can be supported by an implementation

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## C Specification

The `VkPhysicalDeviceBufferDeviceAddressFeaturesEXT` structure is defined as:

    // Provided by VK_EXT_buffer_device_address
    typedef struct VkPhysicalDeviceBufferDeviceAddressFeaturesEXT {
        VkStructureType    sType;
        void*              pNext;
        VkBool32           bufferDeviceAddress;
        VkBool32           bufferDeviceAddressCaptureReplay;
        VkBool32           bufferDeviceAddressMultiDevice;
    } VkPhysicalDeviceBufferDeviceAddressFeaturesEXT;

## Members

This structure describes the following features:

## Description

- `bufferDeviceAddress` indicates that the implementation supports accessing buffer memory in shaders as storage buffers via an address queried from vkGetBufferDeviceAddressEXT.

- `bufferDeviceAddressCaptureReplay` indicates that the implementation supports saving and reusing buffer addresses, e.g. for trace capture and replay.

- `bufferDeviceAddressMultiDevice` indicates that the implementation supports the `bufferDeviceAddress` feature for logical devices created with multiple physical devices. If this feature is not supported, buffer addresses must not be queried on a logical device created with more than one physical device.

If the `VkPhysicalDeviceBufferDeviceAddressFeaturesEXT` structure is included in the `pNext` chain of the VkPhysicalDeviceFeatures2 structure passed to vkGetPhysicalDeviceFeatures2, it is filled in to indicate whether each corresponding feature is supported. `VkPhysicalDeviceBufferDeviceAddressFeaturesEXT` can also be used in the `pNext` chain of VkDeviceCreateInfo to selectively enable these features.

| Note The `VkPhysicalDeviceBufferDeviceAddressFeaturesEXT` structure has the same members as the `VkPhysicalDeviceBufferDeviceAddressFeatures` structure, but the functionality indicated by the members is expressed differently. The features indicated by the `VkPhysicalDeviceBufferDeviceAddressFeatures` structure requires additional flags to be passed at memory allocation time, and the capture and replay mechanism is built around opaque capture addresses for buffer and memory objects.

Valid Usage (Implicit)

- VUID-VkPhysicalDeviceBufferDeviceAddressFeaturesEXT-sType-sType
  `sType` must be `VK_STRUCTURE_TYPE_PHYSICAL_DEVICE_BUFFER_DEVICE_ADDRESS_FEATURES_EXT`

## See Also

`VkBool32`, VkStructureType

## Document Notes

For more information, see the Vulkan Specification

This page is extracted from the Vulkan Specification. Fixes and changes should be made to the Specification, not directly.

## Copyright

Copyright 2014-2021 The Khronos Group Inc.

SPDX-License-Identifier: CC-BY-4.0