# vkCmdSetStencilReference(3) Manual Page

## Name

vkCmdSetStencilReference - Set stencil reference value dynamically for a command buffer

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## C Specification

To dynamically set the stencil reference value, call:

    // Provided by VK_VERSION_1_0
    void vkCmdSetStencilReference(
        VkCommandBuffer                             commandBuffer,
        VkStencilFaceFlags                          faceMask,
        uint32_t                                    reference);

## Parameters

- `commandBuffer` is the command buffer into which the command will be recorded.

- `faceMask` is a bitmask of VkStencilFaceFlagBits specifying the set of stencil state for which to update the reference value, as described above for vkCmdSetStencilCompareMask.

- `reference` is the new value to use as the stencil reference value.

## Description

This command sets the stencil reference value for subsequent drawing commands when drawing using shader objects, or when the graphics pipeline is created with `VK_DYNAMIC_STATE_STENCIL_REFERENCE` set in VkPipelineDynamicStateCreateInfo::`pDynamicStates`. Otherwise, this state is specified by the VkPipelineDepthStencilStateCreateInfo::`reference` value used to create the currently active pipeline, for both front and back faces.

Valid Usage (Implicit)

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

- VUID-vkCmdSetStencilReference-faceMask-parameter
  `faceMask` must be a valid combination of VkStencilFaceFlagBits values

- VUID-vkCmdSetStencilReference-faceMask-requiredbitmask
  `faceMask` must not be `0`

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

- VUID-vkCmdSetStencilReference-commandBuffer-cmdpool
  The `VkCommandPool` that `commandBuffer` was allocated from must support graphics operations

- VUID-vkCmdSetStencilReference-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 | Graphics | State

## See Also

VK_VERSION_1_0, VkCommandBuffer, VkStencilFaceFlags

## 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 2014-2024 The Khronos Group Inc.

SPDX-License-Identifier: CC-BY-4.0