vkCmdPushConstants2(3)

# vkCmdPushConstants2(3) Manual Page

## Name

vkCmdPushConstants2 - Update the values of push constants

## C Specification

To update push constants, call:

    // Provided by VK_VERSION_1_4
    void vkCmdPushConstants2(
        VkCommandBuffer                             commandBuffer,
        const VkPushConstantsInfo*                  pPushConstantsInfo);

    // Provided by VK_KHR_maintenance6
    // Equivalent to vkCmdPushConstants2
    void vkCmdPushConstants2KHR(
        VkCommandBuffer                             commandBuffer,
        const VkPushConstantsInfo*                  pPushConstantsInfo);

## Parameters

- `commandBuffer` is the command buffer in which the push constant update will be recorded.

- `pPushConstantsInfo` is a pointer to a VkPushConstantsInfo structure.

## Description

Valid Usage

- VUID-vkCmdPushConstants2-commandBuffer-11295
  If `commandBuffer` is a secondary command buffer, it must have begun with VkCommandBufferInheritanceDescriptorHeapInfoEXT::`pSamplerHeapBindInfo` equal to `NULL`

- VUID-vkCmdPushConstants2-commandBuffer-11296
  If `commandBuffer` is a secondary command buffer, it must have begun with VkCommandBufferInheritanceDescriptorHeapInfoEXT::`pResourceHeapBindInfo` equal to `NULL`

Valid Usage (Implicit)

- VUID-vkCmdPushConstants2-commandBuffer-parameter
  `commandBuffer` must be a valid VkCommandBuffer handle

- VUID-vkCmdPushConstants2-pPushConstantsInfo-parameter
  `pPushConstantsInfo` must be a valid pointer to a valid VkPushConstantsInfo structure

- VUID-vkCmdPushConstants2-commandBuffer-recording
  `commandBuffer` must be in the recording state

- VUID-vkCmdPushConstants2-commandBuffer-cmdpool
  The `VkCommandPool` that `commandBuffer` was allocated from must support VK_QUEUE_COMPUTE_BIT, or VK_QUEUE_GRAPHICS_BIT operations

- VUID-vkCmdPushConstants2-videocoding
  This command must only be called outside of a video coding scope

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 | VK_QUEUE_COMPUTE_BIT VK_QUEUE_GRAPHICS_BIT | State

Conditional Rendering

vkCmdPushConstants2 is not affected by conditional rendering

## See Also

VK_KHR_maintenance6, VK_VERSION_1_4, VkCommandBuffer, VkPushConstantsInfo

## 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