# vkCmdBindDescriptorBuffersEXT(3) Manual Page

## Name

vkCmdBindDescriptorBuffersEXT - Binding descriptor buffers to a command buffer

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## C Specification

To bind descriptor buffers to a command buffer, call:

    // Provided by VK_EXT_descriptor_buffer
    void vkCmdBindDescriptorBuffersEXT(
        VkCommandBuffer                             commandBuffer,
        uint32_t                                    bufferCount,
        const VkDescriptorBufferBindingInfoEXT*     pBindingInfos);

## Parameters

- `commandBuffer` is the command buffer that the descriptor buffers will be bound to.

- `bufferCount` is the number of elements in the `pBindingInfos` array.

- `pBindingInfos` is a pointer to an array of VkDescriptorBufferBindingInfoEXT structures.

## Description

`vkCmdBindDescriptorBuffersEXT` causes any offsets previously set by vkCmdSetDescriptorBufferOffsetsEXT that use the bindings numbered [`0`.. `bufferCount`-1] to be no longer valid for subsequent bound pipeline commands. Any previously bound buffers at binding points greater than or equal to `bufferCount` are unbound.

Valid Usage

- VUID-vkCmdBindDescriptorBuffersEXT-None-08047
  The `descriptorBuffer` feature must be enabled

- VUID-vkCmdBindDescriptorBuffersEXT-maxSamplerDescriptorBufferBindings-08048
  There must be no more than VkPhysicalDeviceDescriptorBufferPropertiesEXT::`maxSamplerDescriptorBufferBindings` elements in `pBindingInfos` with VkDescriptorBufferBindingInfoEXT::`usage` containing `VK_BUFFER_USAGE_SAMPLER_DESCRIPTOR_BUFFER_BIT_EXT`

- VUID-vkCmdBindDescriptorBuffersEXT-maxResourceDescriptorBufferBindings-08049
  There must be no more than VkPhysicalDeviceDescriptorBufferPropertiesEXT::`maxResourceDescriptorBufferBindings` elements in `pBindingInfos` with VkDescriptorBufferBindingInfoEXT::`usage` containing `VK_BUFFER_USAGE_RESOURCE_DESCRIPTOR_BUFFER_BIT_EXT`

- VUID-vkCmdBindDescriptorBuffersEXT-None-08050
  There must be no more than `1` element in `pBindingInfos` with VkDescriptorBufferBindingInfoEXT::`usage` containing `VK_BUFFER_USAGE_PUSH_DESCRIPTORS_DESCRIPTOR_BUFFER_BIT_EXT`

- VUID-vkCmdBindDescriptorBuffersEXT-bufferCount-08051
  `bufferCount` must be less than or equal to VkPhysicalDeviceDescriptorBufferPropertiesEXT::`maxDescriptorBufferBindings`

- VUID-vkCmdBindDescriptorBuffersEXT-pBindingInfos-08052
  For any element of `pBindingInfos`, if the buffer from which `address` was queried is non-sparse then it must be bound completely and contiguously to a single VkDeviceMemory object

- VUID-vkCmdBindDescriptorBuffersEXT-pBindingInfos-08053
  For any element of `pBindingInfos`, the buffer from which `address` was queried must have been created with the `VK_BUFFER_USAGE_SAMPLER_DESCRIPTOR_BUFFER_BIT_EXT` bit set if it contains sampler descriptor data

- VUID-vkCmdBindDescriptorBuffersEXT-pBindingInfos-08054
  For any element of `pBindingInfos`, the buffer from which `address` was queried must have been created with the `VK_BUFFER_USAGE_RESOURCE_DESCRIPTOR_BUFFER_BIT_EXT` bit set if it contains resource descriptor data

- VUID-vkCmdBindDescriptorBuffersEXT-pBindingInfos-08055
  For any element of `pBindingInfos`, `usage` must match the buffer from which `address` was queried

Valid Usage (Implicit)

- VUID-vkCmdBindDescriptorBuffersEXT-commandBuffer-parameter
  `commandBuffer` must be a valid VkCommandBuffer handle

- VUID-vkCmdBindDescriptorBuffersEXT-pBindingInfos-parameter
  `pBindingInfos` must be a valid pointer to an array of `bufferCount` valid VkDescriptorBufferBindingInfoEXT structures

- VUID-vkCmdBindDescriptorBuffersEXT-commandBuffer-recording
  `commandBuffer` must be in the recording state

- VUID-vkCmdBindDescriptorBuffersEXT-commandBuffer-cmdpool
  The `VkCommandPool` that `commandBuffer` was allocated from must support graphics, compute, or data_graph operations

- VUID-vkCmdBindDescriptorBuffersEXT-videocoding
  This command must only be called outside of a video coding scope

- VUID-vkCmdBindDescriptorBuffersEXT-bufferCount-arraylength
  `bufferCount` must be greater than `0`

Host Synchronization

- Host access to `commandBuffer` must be externally synchronized

- Host access to the `VkCommandPool` that `commandBuffer` was allocated from must be externally synchronized

Command Properties

Command Buffer Levels | Render Pass Scope | Video Coding Scope | Supported Queue Types | Command Type
--- | --- | --- | --- | ---
Primary Secondary | Both | Outside | Graphics Compute Data_Graph | State

## See Also

VK_EXT_descriptor_buffer, VkCommandBuffer, VkDescriptorBufferBindingInfoEXT

## 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 2014-2025 The Khronos Group Inc.

SPDX-License-Identifier: CC-BY-4.0