vkCmdSetPatchControlPointsEXT
To dynamically set the number of control points per patch, call:
void vkCmdSetPatchControlPointsEXT(
VkCommandBuffer commandBuffer,
uint32_t patchControlPoints);
commandBuffer
is the command buffer into which the command will be recorded.patchControlPoints
specifies the number of control points per patch.
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:
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
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
thatcommandBuffer
was allocated from must be externally synchronized ::