C Specification

The VkDescriptorMappingSourceIndirectAddressEXT structure is defined as:

// Provided by VK_EXT_descriptor_heap
typedef struct VkDescriptorMappingSourceIndirectAddressEXT {
    uint32_t    pushOffset;
    uint32_t    addressOffset;
} VkDescriptorMappingSourceIndirectAddressEXT;

Members

  • pushOffset is a byte offset into push data where an indirect address containing the address for the mapped resource will be retrieved.

  • addressOffset is a byte offset into the indirect address where the address for the mapped resource will be retrieved.

Description

Accessing data via the mapped resource in the shader will access data backing the address specified in the indirect address at the supplied offset:

indirectAddress = ((VkDeviceAddress*)pPushData)[pushOffset/8]

resourceAddress = ((VkDeviceAddress*)indirectAddress)[addressOffset/8]

where pPushData is the total set of push data specified by vkCmdPushDataEXT. Reads through indirectAddress are performed as non-volatile uniform buffer reads, and can be synchronized using VK_ACCESS_2_UNIFORM_READ_BIT. Shader reads through resourceAddress are performed according to the mapped resource. If the shader resource is an acceleration structure, the address must be a valid acceleration structure address.

Valid Usage

  • VUID-VkDescriptorMappingSourceIndirectAddressEXT-pushOffset-11266
    pushOffset must be a multiple of 8

  • VUID-VkDescriptorMappingSourceIndirectAddressEXT-pushOffset-11267
    pushOffset must be less than or equal to maxPushDataSize - 8

  • VUID-VkDescriptorMappingSourceIndirectAddressEXT-addressOffset-11268
    addressOffset must be a multiple of 8

See Also

VK_EXT_descriptor_heap, VkDescriptorMappingSourceDataEXT

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