vkCmdDrawMeshTasksNV - Draw mesh task work items

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

• If a ImageView is sampled with FILTER_LINEAR as a result of this command, then the image view’s format features must contain FORMAT_FEATURE_SAMPLED_IMAGE_FILTER_LINEAR_BIT

• If a ImageView is accessed using atomic operations as a result of this command, then the image view’s format features must contain FORMAT_FEATURE_STORAGE_IMAGE_ATOMIC_BIT
• If a ImageView is sampled with FILTER_CUBIC_EXT as a result of this command, then the image view’s format features must contain FORMAT_FEATURE_SAMPLED_IMAGE_FILTER_CUBIC_BIT_EXT
• Any ImageView being sampled with FILTER_CUBIC_EXT as a result of this command must have a ImageViewType and format that supports cubic filtering, as specified by FilterCubicImageViewImageFormatPropertiesEXT::filterCubic returned by getPhysicalDeviceImageFormatProperties2
• Any ImageView being sampled with FILTER_CUBIC_EXT with a reduction mode of either SAMPLER_REDUCTION_MODE_MIN or SAMPLER_REDUCTION_MODE_MAX as a result of this command must have a ImageViewType and format that supports cubic filtering together with minmax filtering, as specified by FilterCubicImageViewImageFormatPropertiesEXT::filterCubicMinmax returned by getPhysicalDeviceImageFormatProperties2
• Any Image created with a 'Graphics.Vulkan.Core10.Image.ImageCreateInfo'::'Graphics.Vulkan.Core10.BaseType.Flags' containing IMAGE_CREATE_CORNER_SAMPLED_BIT_NV sampled as a result of this command must only be sampled using a SamplerAddressMode of SAMPLER_ADDRESS_MODE_CLAMP_TO_EDGE.
• For each set n that is statically used by the Pipeline 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 PipelineLayout that is compatible for set n, with the PipelineLayout used to create the current Pipeline, as described in ???
• For each push constant that is statically used by the Pipeline 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 PipelineLayout that is compatible for push constants, with the PipelineLayout used to create the current Pipeline, as described in ???
• Descriptors in each bound descriptor set, specified via cmdBindDescriptorSets, must be valid if they are statically used by the Pipeline bound to the pipeline bind point used by this command
• A valid pipeline must be bound to the pipeline bind point used by this command
• If the Pipeline object bound to the pipeline bind point used by this command requires any dynamic state, that state must have been set for CommandBuffer, and done so after any previously bound pipeline with the corresponding state not specified as dynamic
• There must not have been any calls to dynamic state setting commands for any state not specified as dynamic in the Pipeline object bound to the pipeline bind point used by this command, since that pipeline was bound
• If the Pipeline object bound to the pipeline bind point used by this command accesses a Sampler object that uses unnormalized coordinates, that sampler must not be used to sample from any Image with a ImageView of the type IMAGE_VIEW_TYPE_3D, IMAGE_VIEW_TYPE_CUBE, IMAGE_VIEW_TYPE_1D_ARRAY, IMAGE_VIEW_TYPE_2D_ARRAY or IMAGE_VIEW_TYPE_CUBE_ARRAY, in any shader stage
• If the Pipeline object bound to the pipeline bind point used by this command accesses a Sampler 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
• If the Pipeline object bound to the pipeline bind point used by this command accesses a Sampler 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
• If the robust buffer access feature is not enabled, and if the Pipeline 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
• If the robust buffer access feature is not enabled, and if the Pipeline 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
• If CommandBuffer is an unprotected command buffer, any resource accessed by the Pipeline object bound to the pipeline bind point used by this command must not be a protected resource
• The current render pass must be compatible with the RenderPass member of the GraphicsPipelineCreateInfo structure specified when creating the Pipeline bound to PIPELINE_BIND_POINT_GRAPHICS.
• The subpass index of the current render pass must be equal to the subpass member of the GraphicsPipelineCreateInfo structure specified when creating the Pipeline bound to PIPELINE_BIND_POINT_GRAPHICS.
• Every input attachment used by the current subpass must be bound to the pipeline via a descriptor set
• 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.
• If the draw is recorded in a render pass instance with multiview enabled, the maximum instance index must be less than or equal to PhysicalDeviceMultiviewProperties::maxMultiviewInstanceIndex.
• If the bound graphics pipeline was created with PipelineSampleLocationsStateCreateInfoEXT::sampleLocationsEnable set to TRUE and the current subpass has a depth/stencil attachment, then that attachment must have been created with the IMAGE_CREATE_SAMPLE_LOCATIONS_COMPATIBLE_DEPTH_BIT_EXT bit set
• taskCount must be less than or equal to PhysicalDeviceMeshShaderPropertiesNV::maxDrawMeshTasksCount

Valid Usage (Implicit)

• CommandBuffer must be a valid CommandBuffer handle

• CommandBuffer must be in the recording state
• The CommandPool that CommandBuffer was allocated from must support graphics operations
• 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 CommandPool that CommandBuffer was allocated from must be externally synchronized

Command Properties

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See Also

CommandBuffer

vkCmdDrawMeshTasksIndirectNV - Issue an indirect mesh tasks draw into a command buffer

Parameters

• CommandBuffer is the command buffer into which the command is recorded.

• Buffer is the buffer containing draw parameters.
• offset is the byte offset into Buffer where parameters begin.
• drawCount is the number of draws to execute, and can be zero.
• stride is the byte stride between successive sets of draw parameters.

Description

cmdDrawMeshTasksIndirectNV behaves similarly to cmdDrawMeshTasksNV except that the parameters are read by the device from a buffer during execution. drawCount draws are executed by the command, with parameters taken from Buffer starting at offset and increasing by stride bytes for each successive draw. The parameters of each draw are encoded in an array of DrawMeshTasksIndirectCommandNV structures. If drawCount is less than or equal to one, stride is ignored.

Valid Usage

• If a ImageView is sampled with FILTER_LINEAR as a result of this command, then the image view’s format features must contain FORMAT_FEATURE_SAMPLED_IMAGE_FILTER_LINEAR_BIT

• If a ImageView is accessed using atomic operations as a result of this command, then the image view’s format features must contain FORMAT_FEATURE_STORAGE_IMAGE_ATOMIC_BIT
• If a ImageView is sampled with FILTER_CUBIC_EXT as a result of this command, then the image view’s format features must contain FORMAT_FEATURE_SAMPLED_IMAGE_FILTER_CUBIC_BIT_EXT
• Any ImageView being sampled with FILTER_CUBIC_EXT as a result of this command must have a ImageViewType and format that supports cubic filtering, as specified by FilterCubicImageViewImageFormatPropertiesEXT::filterCubic returned by getPhysicalDeviceImageFormatProperties2
• Any ImageView being sampled with FILTER_CUBIC_EXT with a reduction mode of either SAMPLER_REDUCTION_MODE_MIN or SAMPLER_REDUCTION_MODE_MAX as a result of this command must have a ImageViewType and format that supports cubic filtering together with minmax filtering, as specified by FilterCubicImageViewImageFormatPropertiesEXT::filterCubicMinmax returned by getPhysicalDeviceImageFormatProperties2
• Any Image created with a 'Graphics.Vulkan.Core10.Image.ImageCreateInfo'::'Graphics.Vulkan.Core10.BaseType.Flags' containing IMAGE_CREATE_CORNER_SAMPLED_BIT_NV sampled as a result of this command must only be sampled using a SamplerAddressMode of SAMPLER_ADDRESS_MODE_CLAMP_TO_EDGE.
• For each set n that is statically used by the Pipeline 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 PipelineLayout that is compatible for set n, with the PipelineLayout used to create the current Pipeline, as described in ???
• For each push constant that is statically used by the Pipeline 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 PipelineLayout that is compatible for push constants, with the PipelineLayout used to create the current Pipeline, as described in ???
• Descriptors in each bound descriptor set, specified via cmdBindDescriptorSets, must be valid if they are statically used by the Pipeline bound to the pipeline bind point used by this command
• A valid pipeline must be bound to the pipeline bind point used by this command
• If the Pipeline object bound to the pipeline bind point used by this command requires any dynamic state, that state must have been set for CommandBuffer, and done so after any previously bound pipeline with the corresponding state not specified as dynamic
• There must not have been any calls to dynamic state setting commands for any state not specified as dynamic in the Pipeline object bound to the pipeline bind point used by this command, since that pipeline was bound
• If the Pipeline object bound to the pipeline bind point used by this command accesses a Sampler object that uses unnormalized coordinates, that sampler must not be used to sample from any Image with a ImageView of the type IMAGE_VIEW_TYPE_3D, IMAGE_VIEW_TYPE_CUBE, IMAGE_VIEW_TYPE_1D_ARRAY, IMAGE_VIEW_TYPE_2D_ARRAY or IMAGE_VIEW_TYPE_CUBE_ARRAY, in any shader stage
• If the Pipeline object bound to the pipeline bind point used by this command accesses a Sampler 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
• If the Pipeline object bound to the pipeline bind point used by this command accesses a Sampler 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
• If the robust buffer access feature is not enabled, and if the Pipeline 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
• If the robust buffer access feature is not enabled, and if the Pipeline 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
• If CommandBuffer is an unprotected command buffer, any resource accessed by the Pipeline object bound to the pipeline bind point used by this command must not be a protected resource
• The current render pass must be compatible with the RenderPass member of the GraphicsPipelineCreateInfo structure specified when creating the Pipeline bound to PIPELINE_BIND_POINT_GRAPHICS.
• The subpass index of the current render pass must be equal to the subpass member of the GraphicsPipelineCreateInfo structure specified when creating the Pipeline bound to PIPELINE_BIND_POINT_GRAPHICS.
• Every input attachment used by the current subpass must be bound to the pipeline via a descriptor set
• 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.
• If the draw is recorded in a render pass instance with multiview enabled, the maximum instance index must be less than or equal to PhysicalDeviceMultiviewProperties::maxMultiviewInstanceIndex.
• If the bound graphics pipeline was created with PipelineSampleLocationsStateCreateInfoEXT::sampleLocationsEnable set to TRUE and the current subpass has a depth/stencil attachment, then that attachment must have been created with the IMAGE_CREATE_SAMPLE_LOCATIONS_COMPATIBLE_DEPTH_BIT_EXT bit set
• If Buffer is non-sparse then it must be bound completely and contiguously to a single DeviceMemory object
• Buffer must have been created with the BUFFER_USAGE_INDIRECT_BUFFER_BIT bit set
• offset must be a multiple of 4
• CommandBuffer must not be a protected command buffer
• If the multi-draw indirect feature is not enabled, drawCount must be 0 or 1
• drawCount must be less than or equal to PhysicalDeviceLimits::maxDrawIndirectCount
• If drawCount is greater than 1, stride must be a multiple of 4 and must be greater than or equal to sizeof(DrawMeshTasksIndirectCommandNV)
• If drawCount is equal to 1, (offset + sizeof(DrawMeshTasksIndirectCommandNV)) must be less than or equal to the size of Buffer
• If drawCount is greater than 1, (stride × (drawCount - 1) + offset + sizeof(DrawMeshTasksIndirectCommandNV)) must be less than or equal to the size of Buffer

Valid Usage (Implicit)

• CommandBuffer must be a valid CommandBuffer handle

• Buffer must be a valid Buffer handle
• CommandBuffer must be in the recording state
• The CommandPool that CommandBuffer was allocated from must support graphics operations
• This command must only be called inside of a render pass instance
• Both of Buffer, and CommandBuffer must have been created, allocated, or retrieved from the same Device

Host Synchronization

• Host access to CommandBuffer must be externally synchronized

• Host access to the CommandPool that CommandBuffer was allocated from must be externally synchronized

Command Properties

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See Also

Buffer, CommandBuffer, DeviceSize

vkCmdDrawMeshTasksIndirectCountNV - Perform an indirect mesh tasks draw with the draw count sourced from a buffer

Parameters

• CommandBuffer is the command buffer into which the command is recorded.

• Buffer is the buffer containing draw parameters.
• offset is the byte offset into Buffer where parameters begin.
• countBuffer is the buffer containing the draw count.
• countBufferOffset is the byte offset into countBuffer where the draw count begins.
• maxDrawCount specifies the maximum number of draws that will be executed. The actual number of executed draw calls is the minimum of the count specified in countBuffer and maxDrawCount.
• stride is the byte stride between successive sets of draw parameters.

Description

cmdDrawMeshTasksIndirectCountNV behaves similarly to cmdDrawMeshTasksIndirectNV except that the draw count is read by the device from a buffer during execution. The command will read an unsigned 32-bit integer from countBuffer located at countBufferOffset and use this as the draw count.

Valid Usage

• If a ImageView is sampled with FILTER_LINEAR as a result of this command, then the image view’s format features must contain FORMAT_FEATURE_SAMPLED_IMAGE_FILTER_LINEAR_BIT

• If a ImageView is accessed using atomic operations as a result of this command, then the image view’s format features must contain FORMAT_FEATURE_STORAGE_IMAGE_ATOMIC_BIT
• If a ImageView is sampled with FILTER_CUBIC_EXT as a result of this command, then the image view’s format features must contain FORMAT_FEATURE_SAMPLED_IMAGE_FILTER_CUBIC_BIT_EXT
• Any ImageView being sampled with FILTER_CUBIC_EXT as a result of this command must have a ImageViewType and format that supports cubic filtering, as specified by FilterCubicImageViewImageFormatPropertiesEXT::filterCubic returned by getPhysicalDeviceImageFormatProperties2
• Any ImageView being sampled with FILTER_CUBIC_EXT with a reduction mode of either SAMPLER_REDUCTION_MODE_MIN or SAMPLER_REDUCTION_MODE_MAX as a result of this command must have a ImageViewType and format that supports cubic filtering together with minmax filtering, as specified by FilterCubicImageViewImageFormatPropertiesEXT::filterCubicMinmax returned by getPhysicalDeviceImageFormatProperties2
• Any Image created with a 'Graphics.Vulkan.Core10.Image.ImageCreateInfo'::'Graphics.Vulkan.Core10.BaseType.Flags' containing IMAGE_CREATE_CORNER_SAMPLED_BIT_NV sampled as a result of this command must only be sampled using a SamplerAddressMode of SAMPLER_ADDRESS_MODE_CLAMP_TO_EDGE.
• For each set n that is statically used by the Pipeline 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 PipelineLayout that is compatible for set n, with the PipelineLayout used to create the current Pipeline, as described in ???
• For each push constant that is statically used by the Pipeline 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 PipelineLayout that is compatible for push constants, with the PipelineLayout used to create the current Pipeline, as described in ???
• Descriptors in each bound descriptor set, specified via cmdBindDescriptorSets, must be valid if they are statically used by the Pipeline bound to the pipeline bind point used by this command
• A valid pipeline must be bound to the pipeline bind point used by this command
• If the Pipeline object bound to the pipeline bind point used by this command requires any dynamic state, that state must have been set for CommandBuffer, and done so after any previously bound pipeline with the corresponding state not specified as dynamic
• There must not have been any calls to dynamic state setting commands for any state not specified as dynamic in the Pipeline object bound to the pipeline bind point used by this command, since that pipeline was bound
• If the Pipeline object bound to the pipeline bind point used by this command accesses a Sampler object that uses unnormalized coordinates, that sampler must not be used to sample from any Image with a ImageView of the type IMAGE_VIEW_TYPE_3D, IMAGE_VIEW_TYPE_CUBE, IMAGE_VIEW_TYPE_1D_ARRAY, IMAGE_VIEW_TYPE_2D_ARRAY or IMAGE_VIEW_TYPE_CUBE_ARRAY, in any shader stage
• If the Pipeline object bound to the pipeline bind point used by this command accesses a Sampler 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
• If the Pipeline object bound to the pipeline bind point used by this command accesses a Sampler 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
• If the robust buffer access feature is not enabled, and if the Pipeline 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
• If the robust buffer access feature is not enabled, and if the Pipeline 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
• If CommandBuffer is an unprotected command buffer, any resource accessed by the Pipeline object bound to the pipeline bind point used by this command must not be a protected resource
• The current render pass must be compatible with the RenderPass member of the GraphicsPipelineCreateInfo structure specified when creating the Pipeline bound to PIPELINE_BIND_POINT_GRAPHICS.
• The subpass index of the current render pass must be equal to the subpass member of the GraphicsPipelineCreateInfo structure specified when creating the Pipeline bound to PIPELINE_BIND_POINT_GRAPHICS.
• Every input attachment used by the current subpass must be bound to the pipeline via a descriptor set
• 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.
• If the draw is recorded in a render pass instance with multiview enabled, the maximum instance index must be less than or equal to PhysicalDeviceMultiviewProperties::maxMultiviewInstanceIndex.
• If the bound graphics pipeline was created with PipelineSampleLocationsStateCreateInfoEXT::sampleLocationsEnable set to TRUE and the current subpass has a depth/stencil attachment, then that attachment must have been created with the IMAGE_CREATE_SAMPLE_LOCATIONS_COMPATIBLE_DEPTH_BIT_EXT bit set
• If Buffer is non-sparse then it must be bound completely and contiguously to a single DeviceMemory object
• Buffer must have been created with the BUFFER_USAGE_INDIRECT_BUFFER_BIT bit set
• offset must be a multiple of 4
• CommandBuffer must not be a protected command buffer
• If countBuffer is non-sparse then it must be bound completely and contiguously to a single DeviceMemory object
• countBuffer must have been created with the BUFFER_USAGE_INDIRECT_BUFFER_BIT bit set
• countBufferOffset must be a multiple of 4
• The count stored in countBuffer must be less than or equal to PhysicalDeviceLimits::maxDrawIndirectCount
• stride must be a multiple of 4 and must be greater than or equal to sizeof(DrawMeshTasksIndirectCommandNV)
• If maxDrawCount is greater than or equal to 1, (stride × (maxDrawCount - 1) + offset + sizeof(DrawMeshTasksIndirectCommandNV)) must be less than or equal to the size of Buffer
• If the count stored in countBuffer is equal to 1, (offset + sizeof(DrawMeshTasksIndirectCommandNV)) must be less than or equal to the size of Buffer
• If the count stored in countBuffer is greater than 1, (stride × (drawCount - 1) + offset + sizeof(DrawMeshTasksIndirectCommandNV)) must be less than or equal to the size of Buffer

Valid Usage (Implicit)

• CommandBuffer must be a valid CommandBuffer handle

• Buffer must be a valid Buffer handle
• countBuffer must be a valid Buffer handle
• CommandBuffer must be in the recording state
• The CommandPool that CommandBuffer was allocated from must support graphics operations
• This command must only be called inside of a render pass instance
• Each of Buffer, CommandBuffer, and countBuffer must have been created, allocated, or retrieved from the same Device

Host Synchronization

• Host access to CommandBuffer must be externally synchronized

• Host access to the CommandPool that CommandBuffer was allocated from must be externally synchronized

Command Properties

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See Also

Buffer, CommandBuffer, DeviceSize

VkPhysicalDeviceMeshShaderFeaturesNV - Structure describing mesh shading features that can be supported by an implementation

Description

If the PhysicalDeviceMeshShaderFeaturesNV structure is included in the pNext chain of PhysicalDeviceFeatures2, it is filled with a value indicating whether the feature is supported. PhysicalDeviceMeshShaderFeaturesNV can also be included in pNext chain of DeviceCreateInfo to enable the features.

Valid Usage (Implicit)

See Also

Bool32, StructureType

VkPhysicalDeviceMeshShaderPropertiesNV - Structure describing mesh shading properties

Members

The members of the PhysicalDeviceMeshShaderPropertiesNV structure describe the following implementation-dependent limits:

Description

If the PhysicalDeviceMeshShaderPropertiesNV structure is included in the pNext chain of PhysicalDeviceProperties2, it is filled with the implementation-dependent limits.

Valid Usage (Implicit)

See Also

StructureType

VkDrawMeshTasksIndirectCommandNV - Structure specifying a mesh tasks draw indirect command

Description

The members of DrawMeshTasksIndirectCommandNV have the same meaning as the similarly named parameters of cmdDrawMeshTasksNV.

Valid Usage

See Also

cmdDrawMeshTasksIndirectNV