vkCmdSetPatchControlPointsEXT(3)

# vkCmdSetPatchControlPointsEXT(3) Manual Page

## Name

vkCmdSetPatchControlPointsEXT - Specify the number of control points per patch dynamically for a command buffer

## C Specification

To dynamically set the number of control points per patch, call:

    // Provided by VK_EXT_extended_dynamic_state2, VK_EXT_shader_object
    void vkCmdSetPatchControlPointsEXT(
        VkCommandBuffer                             commandBuffer,
        uint32_t                                    patchControlPoints);

## Parameters

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

- `patchControlPoints` specifies the number of control points per patch.

## Description

This command sets the number of control points per patch for subsequent drawing commands when drawing using shader objects, or when the graphics pipeline is created with VK_DYNAMIC_STATE_PATCH_CONTROL_POINTS_EXT set in VkPipelineDynamicStateCreateInfo::`pDynamicStates`. Otherwise, this state is specified by the VkPipelineTessellationStateCreateInfo::`patchControlPoints` value used to create the currently active pipeline.

Valid Usage

- VUID-vkCmdSetPatchControlPointsEXT-None-09422
  At least one of the following must be true:

  - The `extendedDynamicState2PatchControlPoints` feature is enabled

  - The `shaderObject` feature is enabled

- VUID-vkCmdSetPatchControlPointsEXT-patchControlPoints-04874
  `patchControlPoints` must be greater than zero and less than or equal to `VkPhysicalDeviceLimits`::`maxTessellationPatchSize`

Valid Usage (Implicit)

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

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

- VUID-vkCmdSetPatchControlPointsEXT-commandBuffer-cmdpool
  The `VkCommandPool` that `commandBuffer` was allocated from must support VK_QUEUE_GRAPHICS_BIT operations

- VUID-vkCmdSetPatchControlPointsEXT-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_GRAPHICS_BIT | State

Conditional Rendering

vkCmdSetPatchControlPointsEXT is not affected by conditional rendering

## See Also

VK_EXT_extended_dynamic_state2, VK_EXT_shader_object, VkCommandBuffer

## 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