C Specification

Data describing the descriptor is passed in a VkDescriptorDataEXT structure:

// Provided by VK_EXT_descriptor_buffer
typedef union VkDescriptorDataEXT {
    const VkSampler*                     pSampler;
    const VkDescriptorImageInfo*         pCombinedImageSampler;
    const VkDescriptorImageInfo*         pInputAttachmentImage;
    const VkDescriptorImageInfo*         pSampledImage;
    const VkDescriptorImageInfo*         pStorageImage;
    const VkDescriptorAddressInfoEXT*    pUniformTexelBuffer;
    const VkDescriptorAddressInfoEXT*    pStorageTexelBuffer;
    const VkDescriptorAddressInfoEXT*    pUniformBuffer;
    const VkDescriptorAddressInfoEXT*    pStorageBuffer;
    VkDeviceAddress                      accelerationStructure;
} VkDescriptorDataEXT;

Members

Description

If the nullDescriptor feature is enabled, pSampledImage, pStorageImage, pUniformTexelBuffer, pStorageTexelBuffer, pUniformBuffer, and pStorageBuffer can each be NULL. Loads from a null descriptor return zero values and stores and atomics to a null descriptor are discarded.

If the nullDescriptor feature is enabled, accelerationStructure can be 0. A null acceleration structure descriptor results in the miss shader being invoked.

Valid Usage

See Also

VK_EXT_descriptor_buffer, VkDescriptorAddressInfoEXT, VkDescriptorGetInfoEXT, VkDescriptorImageInfo, VkDeviceAddress, VkSampler

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 2014-2026 The Khronos Group Inc.

SPDX-License-Identifier: CC-BY-4.0