C Specification

To record a draw that uses the mesh pipeline, call:

// Provided by VK_NV_mesh_shader
void vkCmdDrawMeshTasksNV(
    VkCommandBuffer                             commandBuffer,
    uint32_t                                    taskCount,
    uint32_t                                    firstTask);

Parameters

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

  • taskCount is the number of local workgroups to dispatch in the X dimension. Y and Z dimension are implicitly set to one.

  • firstTask is the X component of the first workgroup ID.

Description

When the command is executed, a global workgroup consisting of taskCount local workgroups is assembled.

Valid Usage
  • VUID-vkCmdDrawMeshTasksNV-magFilter-04553
    If a VkSampler created with magFilter or minFilter equal to VK_FILTER_LINEAR and compareEnable equal to VK_FALSE is used to sample a VkImageView as a result of this command, then the image view’s format features must contain VK_FORMAT_FEATURE_SAMPLED_IMAGE_FILTER_LINEAR_BIT

  • VUID-vkCmdDrawMeshTasksNV-mipmapMode-04770
    If a VkSampler created with mipmapMode equal to VK_SAMPLER_MIPMAP_MODE_LINEAR and compareEnable equal to VK_FALSE is used to sample a VkImageView as a result of this command, then the image view’s format features must contain VK_FORMAT_FEATURE_SAMPLED_IMAGE_FILTER_LINEAR_BIT

  • VUID-vkCmdDrawMeshTasksNV-None-02691
    If a VkImageView is accessed using atomic operations as a result of this command, then the image view’s format features must contain VK_FORMAT_FEATURE_STORAGE_IMAGE_ATOMIC_BIT

  • VUID-vkCmdDrawMeshTasksNV-None-02692
    If a VkImageView is sampled with VK_FILTER_CUBIC_EXT as a result of this command, then the image view’s format features must contain VK_FORMAT_FEATURE_SAMPLED_IMAGE_FILTER_CUBIC_BIT_EXT

  • VUID-vkCmdDrawMeshTasksNV-filterCubic-02694
    Any VkImageView being sampled with VK_FILTER_CUBIC_EXT as a result of this command must have a VkImageViewType and format that supports cubic filtering, as specified by VkFilterCubicImageViewImageFormatPropertiesEXT::filterCubic returned by vkGetPhysicalDeviceImageFormatProperties2

  • VUID-vkCmdDrawMeshTasksNV-filterCubicMinmax-02695
    Any VkImageView being sampled with VK_FILTER_CUBIC_EXT with a reduction mode of either VK_SAMPLER_REDUCTION_MODE_MIN or VK_SAMPLER_REDUCTION_MODE_MAX as a result of this command must have a VkImageViewType and format that supports cubic filtering together with minmax filtering, as specified by VkFilterCubicImageViewImageFormatPropertiesEXT::filterCubicMinmax returned by vkGetPhysicalDeviceImageFormatProperties2

  • VUID-vkCmdDrawMeshTasksNV-flags-02696
    Any VkImage created with a VkImageCreateInfo::flags containing VK_IMAGE_CREATE_CORNER_SAMPLED_BIT_NV sampled as a result of this command must only be sampled using a VkSamplerAddressMode of VK_SAMPLER_ADDRESS_MODE_CLAMP_TO_EDGE

  • VUID-vkCmdDrawMeshTasksNV-None-02697
    For each set n that is statically used by the VkPipeline bound to the pipeline bind point used by this command, a descriptor set must have been bound to n at the same pipeline bind point, with a VkPipelineLayout that is compatible for set n, with the VkPipelineLayout used to create the current VkPipeline, as described in [descriptorsets-compatibility]

  • VUID-vkCmdDrawMeshTasksNV-None-02698
    For each push constant that is statically used by the VkPipeline bound to the pipeline bind point used by this command, a push constant value must have been set for the same pipeline bind point, with a VkPipelineLayout that is compatible for push constants, with the VkPipelineLayout used to create the current VkPipeline, as described in [descriptorsets-compatibility]

  • VUID-vkCmdDrawMeshTasksNV-None-02699
    Descriptors in each bound descriptor set, specified via vkCmdBindDescriptorSets, must be valid if they are statically used by the VkPipeline bound to the pipeline bind point used by this command

  • VUID-vkCmdDrawMeshTasksNV-None-02700
    A valid pipeline must be bound to the pipeline bind point used by this command

  • VUID-vkCmdDrawMeshTasksNV-commandBuffer-02701
    If the VkPipeline object bound to the pipeline bind point used by this command requires any dynamic state, that state must have been set or inherited for commandBuffer, and done so after any previously bound pipeline with the corresponding state not specified as dynamic

  • VUID-vkCmdDrawMeshTasksNV-None-02859
    There must not have been any calls to dynamic state setting commands for any state not specified as dynamic in the VkPipeline object bound to the pipeline bind point used by this command, since that pipeline was bound

  • VUID-vkCmdDrawMeshTasksNV-None-02702
    If the VkPipeline object bound to the pipeline bind point used by this command accesses a VkSampler object that uses unnormalized coordinates, that sampler must not be used to sample from any VkImage with a VkImageView of the type VK_IMAGE_VIEW_TYPE_3D, VK_IMAGE_VIEW_TYPE_CUBE, VK_IMAGE_VIEW_TYPE_1D_ARRAY, VK_IMAGE_VIEW_TYPE_2D_ARRAY or VK_IMAGE_VIEW_TYPE_CUBE_ARRAY, in any shader stage

  • VUID-vkCmdDrawMeshTasksNV-None-02703
    If the VkPipeline object bound to the pipeline bind point used by this command accesses a VkSampler object that uses unnormalized coordinates, that sampler must not be used with any of the SPIR-V OpImageSample* or OpImageSparseSample* instructions with ImplicitLod, Dref or Proj in their name, in any shader stage

  • VUID-vkCmdDrawMeshTasksNV-None-02704
    If the VkPipeline object bound to the pipeline bind point used by this command accesses a VkSampler object that uses unnormalized coordinates, that sampler must not be used with any of the SPIR-V OpImageSample* or OpImageSparseSample* instructions that includes a LOD bias or any offset values, in any shader stage

  • VUID-vkCmdDrawMeshTasksNV-None-02705
    If the robust buffer access feature is not enabled, and if the VkPipeline object bound to the pipeline bind point used by this command accesses a uniform buffer, it must not access values outside of the range of the buffer as specified in the descriptor set bound to the same pipeline bind point

  • VUID-vkCmdDrawMeshTasksNV-None-02706
    If the robust buffer access feature is not enabled, and if the VkPipeline object bound to the pipeline bind point used by this command accesses a storage buffer, it must not access values outside of the range of the buffer as specified in the descriptor set bound to the same pipeline bind point

  • VUID-vkCmdDrawMeshTasksNV-commandBuffer-02707
    If commandBuffer is an unprotected command buffer, any resource accessed by the VkPipeline object bound to the pipeline bind point used by this command must not be a protected resource

  • VUID-vkCmdDrawMeshTasksNV-None-04115
    If a VkImageView is accessed using OpImageWrite as a result of this command, then the Type of the Texel operand of that instruction must have at least as many components as the image view’s format.

  • VUID-vkCmdDrawMeshTasksNV-OpImageWrite-04469
    If a VkBufferView is accessed using OpImageWrite as a result of this command, then the Type of the Texel operand of that instruction must have at least as many components as the buffer view’s format.

  • VUID-vkCmdDrawMeshTasksNV-SampledType-04470
    If a VkImageView with a VkFormat that has a 64-bit channel width is accessed as a result of this command, the SampledType of the OpTypeImage operand of that instruction must have a Width of 64.

  • VUID-vkCmdDrawMeshTasksNV-SampledType-04471
    If a VkImageView with a VkFormat that has a channel width less than 64-bit is accessed as a result of this command, the SampledType of the OpTypeImage operand of that instruction must have a Width of 32.

  • VUID-vkCmdDrawMeshTasksNV-SampledType-04472
    If a VkBufferView with a VkFormat that has a 64-bit channel width is accessed as a result of this command, the SampledType of the OpTypeImage operand of that instruction must have a Width of 64.

  • VUID-vkCmdDrawMeshTasksNV-SampledType-04473
    If a VkBufferView with a VkFormat that has a channel width less than 64-bit is accessed as a result of this command, the SampledType of the OpTypeImage operand of that instruction must have a Width of 32.

  • VUID-vkCmdDrawMeshTasksNV-sparseImageInt64Atomics-04474
    If the sparseImageInt64Atomics feature is not enabled, VkImage objects created with the VK_IMAGE_CREATE_SPARSE_RESIDENCY_BIT flag must not be accessed by atomic instructions through an OpTypeImage with a SampledType with a Width of 64 by this command.

  • VUID-vkCmdDrawMeshTasksNV-sparseImageInt64Atomics-04475
    If the sparseImageInt64Atomics feature is not enabled, VkBuffer objects created with the VK_BUFFER_CREATE_SPARSE_RESIDENCY_BIT flag must not be accessed by atomic instructions through an OpTypeImage with a SampledType with a Width of 64 by this command.

  • VUID-vkCmdDrawMeshTasksNV-renderPass-02684
    The current render pass must be compatible with the renderPass member of the VkGraphicsPipelineCreateInfo structure specified when creating the VkPipeline bound to VK_PIPELINE_BIND_POINT_GRAPHICS

  • VUID-vkCmdDrawMeshTasksNV-subpass-02685
    The subpass index of the current render pass must be equal to the subpass member of the VkGraphicsPipelineCreateInfo structure specified when creating the VkPipeline bound to VK_PIPELINE_BIND_POINT_GRAPHICS

  • VUID-vkCmdDrawMeshTasksNV-None-02686
    Every input attachment used by the current subpass must be bound to the pipeline via a descriptor set

  • VUID-vkCmdDrawMeshTasksNV-None-04584
    Image subresources used as attachments in the current render pass must not be accessed in any way other than as an attachment by this command, except for cases involving read-only access to depth/stencil attachments as described in the Render Pass chapter

  • VUID-vkCmdDrawMeshTasksNV-maxMultiviewInstanceIndex-02688
    If the draw is recorded in a render pass instance with multiview enabled, the maximum instance index must be less than or equal to VkPhysicalDeviceMultiviewProperties::maxMultiviewInstanceIndex

  • VUID-vkCmdDrawMeshTasksNV-sampleLocationsEnable-02689
    If the bound graphics pipeline was created with VkPipelineSampleLocationsStateCreateInfoEXT::sampleLocationsEnable set to VK_TRUE and the current subpass has a depth/stencil attachment, then that attachment must have been created with the VK_IMAGE_CREATE_SAMPLE_LOCATIONS_COMPATIBLE_DEPTH_BIT_EXT bit set

  • VUID-vkCmdDrawMeshTasksNV-viewportCount-03417
    If the bound graphics pipeline state was created with the VK_DYNAMIC_STATE_VIEWPORT_WITH_COUNT_EXT dynamic state enabled, but not the VK_DYNAMIC_STATE_SCISSOR_WITH_COUNT_EXT dynamic state enabled, then vkCmdSetViewportWithCountEXT must have been called in the current command buffer prior to this draw command, and the viewportCount parameter of vkCmdSetViewportWithCountEXT must match the VkPipelineViewportStateCreateInfo::scissorCount of the pipeline

  • VUID-vkCmdDrawMeshTasksNV-scissorCount-03418
    If the bound graphics pipeline state was created with the VK_DYNAMIC_STATE_SCISSOR_WITH_COUNT_EXT dynamic state enabled, but not the VK_DYNAMIC_STATE_VIEWPORT_WITH_COUNT_EXT dynamic state enabled, then vkCmdSetScissorWithCountEXT must have been called in the current command buffer prior to this draw command, and the scissorCount parameter of vkCmdSetScissorWithCountEXT must match the VkPipelineViewportStateCreateInfo::viewportCount of the pipeline

  • VUID-vkCmdDrawMeshTasksNV-viewportCount-03419
    If the bound graphics pipeline state was created with both the VK_DYNAMIC_STATE_SCISSOR_WITH_COUNT_EXT and VK_DYNAMIC_STATE_VIEWPORT_WITH_COUNT_EXT dynamic states enabled then both vkCmdSetViewportWithCountEXT and vkCmdSetScissorWithCountEXT must have been called in the current command buffer prior to this draw command, and the viewportCount parameter of vkCmdSetViewportWithCountEXT must match the scissorCount parameter of vkCmdSetScissorWithCountEXT

  • VUID-vkCmdDrawMeshTasksNV-viewportCount-04137
    If the bound graphics pipeline state was created with the VK_DYNAMIC_STATE_VIEWPORT_WITH_COUNT_EXT dynamic state enabled, but not the VK_DYNAMIC_STATE_VIEWPORT_W_SCALING_NV dynamic state enabled, then the bound graphics pipeline must have been created with VkPipelineViewportWScalingStateCreateInfoNV::viewportCount greater or equal to the viewportCount parameter in the last call to vkCmdSetViewportWithCountEXT

  • VUID-vkCmdDrawMeshTasksNV-viewportCount-04138
    If the bound graphics pipeline state was created with the VK_DYNAMIC_STATE_VIEWPORT_WITH_COUNT_EXT and VK_DYNAMIC_STATE_VIEWPORT_W_SCALING_NV dynamic states enabled then the viewportCount parameter in the last call to vkCmdSetViewportWScalingNV must be greater than or equal to the viewportCount parameter in the last call to vkCmdSetViewportWithCountEXT

  • VUID-vkCmdDrawMeshTasksNV-viewportCount-04139
    If the bound graphics pipeline state was created with the VK_DYNAMIC_STATE_VIEWPORT_WITH_COUNT_EXT dynamic state enabled, but not the VK_DYNAMIC_STATE_VIEWPORT_SHADING_RATE_PALETTE_NV dynamic state enabled, then the bound graphics pipeline must have been created with VkPipelineViewportShadingRateImageStateCreateInfoNV::viewportCount greater or equal to the viewportCount parameter in the last call to vkCmdSetViewportWithCountEXT

  • VUID-vkCmdDrawMeshTasksNV-viewportCount-04140
    If the bound graphics pipeline state was created with the VK_DYNAMIC_STATE_VIEWPORT_WITH_COUNT_EXT and VK_DYNAMIC_STATE_VIEWPORT_SHADING_RATE_PALETTE_NV dynamic states enabled then the viewportCount parameter in the last call to vkCmdSetViewportShadingRatePaletteNV must be greater than or equal to the viewportCount parameter in the last call to vkCmdSetViewportWithCountEXT

  • VUID-vkCmdDrawMeshTasksNV-VkPipelineVieportCreateInfo-04141
    If the bound graphics pipeline state was created with the VK_DYNAMIC_STATE_VIEWPORT_WITH_COUNT_EXT dynamic state enabled and an instance of VkPipelineViewportSwizzleStateCreateInfoNV chained from VkPipelineVieportCreateInfo, then the bound graphics pipeline must have been created with VkPipelineViewportSwizzleStateCreateInfoNV::viewportCount greater or equal to the viewportCount parameter in the last call to vkCmdSetViewportWithCountEXT

  • VUID-vkCmdDrawMeshTasksNV-VkPipelineVieportCreateInfo-04142
    If the bound graphics pipeline state was created with the VK_DYNAMIC_STATE_VIEWPORT_WITH_COUNT_EXT dynamic state enabled and an instance of VkPipelineViewportExclusiveScissorStateCreateInfoNV chained from VkPipelineVieportCreateInfo, then the bound graphics pipeline must have been created with VkPipelineViewportExclusiveScissorStateCreateInfoNV::exclusiveScissorCount greater or equal to the viewportCount parameter in the last call to vkCmdSetViewportWithCountEXT

  • VUID-vkCmdDrawMeshTasksNV-primitiveTopology-03420
    If the bound graphics pipeline state was created with the VK_DYNAMIC_STATE_PRIMITIVE_TOPOLOGY_EXT dynamic state enabled then vkCmdSetPrimitiveTopologyEXT must have been called in the current command buffer prior to this draw command, and the primitiveTopology parameter of vkCmdSetPrimitiveTopologyEXT must be of the same topology class as the pipeline VkPipelineInputAssemblyStateCreateInfo::topology state

  • VUID-vkCmdDrawMeshTasksNV-None-04875
    If the bound graphics pipeline state was created with the VK_DYNAMIC_STATE_PATCH_CONTROL_POINTS_EXT dynamic state enabled then vkCmdSetPatchControlPointsEXT must have been called in the current command buffer prior to this draw command

  • VUID-vkCmdDrawMeshTasksNV-None-04876
    If the bound graphics pipeline state was created with the VK_DYNAMIC_STATE_RASTERIZER_DISCARD_ENABLE_EXT dynamic state enabled then vkCmdSetRasterizerDiscardEnableEXT must have been called in the current command buffer prior to this draw command

  • VUID-vkCmdDrawMeshTasksNV-None-04877
    If the bound graphics pipeline state was created with the VK_DYNAMIC_STATE_DEPTH_BIAS_ENABLE_EXT dynamic state enabled then vkCmdSetDepthBiasEnableEXT must have been called in the current command buffer prior to this draw command

  • VUID-vkCmdDrawMeshTasksNV-logicOp-04878
    If the bound graphics pipeline state was created with the VK_DYNAMIC_STATE_LOGIC_OP_EXT dynamic state enabled then vkCmdSetLogicOpEXT must have been called in the current command buffer prior to this draw command and the logicOp must be a valid VkLogicOp value

  • VUID-vkCmdDrawMeshTasksNV-None-04879
    If the bound graphics pipeline state was created with the VK_DYNAMIC_STATE_PRIMITIVE_RESTART_ENABLE_EXT dynamic state enabled then vkCmdSetPrimitiveRestartEnableEXT must have been called in the current command buffer prior to this draw command

  • VUID-vkCmdDrawMeshTasksNV-primitiveFragmentShadingRateWithMultipleViewports-04552
    If the primitiveFragmentShadingRateWithMultipleViewports limit is not supported, the bound graphics pipeline was created with the VK_DYNAMIC_STATE_VIEWPORT_WITH_COUNT_EXT dynamic state enabled, and any of the shader stages of the bound graphics pipeline write to the PrimitiveShadingRateKHR built-in, then vkCmdSetViewportWithCountEXT must have been called in the current command buffer prior to this draw command, and the viewportCount parameter of vkCmdSetViewportWithCountEXT must be 1

  • VUID-vkCmdDrawMeshTasksNV-blendEnable-04727
    If rasterization is not disabled in the bound graphics pipeline, then for each color attachment in the subpass, if the corresponding image view’s format features do not contain VK_FORMAT_FEATURE_COLOR_ATTACHMENT_BLEND_BIT, then the blendEnable member of the corresponding element of the pAttachments member of pColorBlendState must be VK_FALSE

  • VUID-vkCmdDrawMeshTasksNV-rasterizationSamples-04740
    If rasterization is not disabled in the bound graphics pipeline, and neither the [VK_AMD_mixed_attachment_samples] nor the [VK_NV_framebuffer_mixed_samples] extensions are enabled, then VkPipelineMultisampleStateCreateInfo::rasterizationSamples must be the same as the current subpass color and/or depth/stencil attachments

  • VUID-vkCmdDrawMeshTasksNV-pStrides-04884
    If the bound graphics pipeline was created with the VK_DYNAMIC_STATE_VERTEX_INPUT_BINDING_STRIDE_EXT dynamic state enabled, then vkCmdBindVertexBuffers2EXT must have been called in the current command buffer prior to this draw command, and the pStrides parameter of vkCmdBindVertexBuffers2EXT must not be NULL

  • VUID-vkCmdDrawMeshTasksNV-taskCount-02119
    taskCount must be less than or equal to VkPhysicalDeviceMeshShaderPropertiesNV::maxDrawMeshTasksCount

Valid Usage (Implicit)
  • VUID-vkCmdDrawMeshTasksNV-commandBuffer-parameter
    commandBuffer must be a valid VkCommandBuffer handle

  • VUID-vkCmdDrawMeshTasksNV-commandBuffer-recording
    commandBuffer must be in the recording state

  • VUID-vkCmdDrawMeshTasksNV-commandBuffer-cmdpool
    The VkCommandPool that commandBuffer was allocated from must support graphics operations

  • VUID-vkCmdDrawMeshTasksNV-renderpass
    This command must only be called inside of a render pass instance

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

Inside

Graphics

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