vkCmdSetPatchControlPointsEXT(3)

C Specification

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

// 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 the number of control points per patch.

Description

This command sets the number of control points per patch for subsequent drawing commands 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
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