C Specification

To dynamically specify the number of control points per patch:

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

Parameters

  • commandBuffer is the command buffer into which the command will be recorded.

  • patchControlPoints specifies number of control points per patch.

Description

This command sets the state for a given draw when the graphics pipeline is created with VK_DYNAMIC_STATE_PATCH_CONTROL_POINTS_EXT set in VkPipelineDynamicStateCreateInfo::pDynamicStates.

Valid Usage
  • VUID-vkCmdSetPatchControlPointsEXT-None-04873
    The extendedDynamicState2PatchControlPoints feature must be 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 graphics operations

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 Supported Queue Types Pipeline Type

Primary
Secondary

Both

Graphics

See Also

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 2014-2021 The Khronos Group Inc.

SPDX-License-Identifier: CC-BY-4.0