# VkPhysicalDeviceMeshShaderPropertiesNV(3) Manual Page

## Name

VkPhysicalDeviceMeshShaderPropertiesNV - Structure describing mesh shading properties

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## C Specification

The `VkPhysicalDeviceMeshShaderPropertiesNV` structure is defined as:

    // Provided by VK_NV_mesh_shader
    typedef struct VkPhysicalDeviceMeshShaderPropertiesNV {
        VkStructureType    sType;
        void*              pNext;
        uint32_t           maxDrawMeshTasksCount;
        uint32_t           maxTaskWorkGroupInvocations;
        uint32_t           maxTaskWorkGroupSize[3];
        uint32_t           maxTaskTotalMemorySize;
        uint32_t           maxTaskOutputCount;
        uint32_t           maxMeshWorkGroupInvocations;
        uint32_t           maxMeshWorkGroupSize[3];
        uint32_t           maxMeshTotalMemorySize;
        uint32_t           maxMeshOutputVertices;
        uint32_t           maxMeshOutputPrimitives;
        uint32_t           maxMeshMultiviewViewCount;
        uint32_t           meshOutputPerVertexGranularity;
        uint32_t           meshOutputPerPrimitiveGranularity;
    } VkPhysicalDeviceMeshShaderPropertiesNV;

## Members

- `sType` is a VkStructureType value identifying this structure.

- `pNext` is `NULL` or a pointer to a structure extending this structure.

- `maxDrawMeshTasksCount` is the maximum number of local workgroups that can be launched by a single draw mesh tasks command. See https://registry.khronos.org/vulkan/specs/latest/html/vkspec.html#drawing-mesh-shading.

- `maxTaskWorkGroupInvocations` is the maximum total number of task shader invocations in a single local workgroup. The product of the X, Y, and Z sizes, as specified by the `LocalSize` or `LocalSizeId` execution mode in shader modules or by the object decorated by the `WorkgroupSize` decoration, must be less than or equal to this limit.

- `maxTaskWorkGroupSize`[3] is the maximum size of a local task workgroup. These three values represent the maximum local workgroup size in the X, Y, and Z dimensions, respectively. The `x`, `y`, and `z` sizes, as specified by the `LocalSize` or `LocalSizeId` execution mode or by the object decorated by the `WorkgroupSize` decoration in shader modules, must be less than or equal to the corresponding limit.

- `maxTaskTotalMemorySize` is the maximum number of bytes that the task shader can use in total for shared and output memory combined.

- `maxTaskOutputCount` is the maximum number of output tasks a single task shader workgroup can emit.

- `maxMeshWorkGroupInvocations` is the maximum total number of mesh shader invocations in a single local workgroup. The product of the X, Y, and Z sizes, as specified by the `LocalSize` or `LocalSizeId` execution mode in shader modules or by the object decorated by the `WorkgroupSize` decoration, must be less than or equal to this limit.

- `maxMeshWorkGroupSize`[3] is the maximum size of a local mesh workgroup. These three values represent the maximum local workgroup size in the X, Y, and Z dimensions, respectively. The `x`, `y`, and `z` sizes, as specified by the `LocalSize` or `LocalSizeId` execution mode or by the object decorated by the `WorkgroupSize` decoration in shader modules, must be less than or equal to the corresponding limit.

- `maxMeshTotalMemorySize` is the maximum number of bytes that the mesh shader can use in total for shared and output memory combined.

- `maxMeshOutputVertices` is the maximum number of vertices a mesh shader output can store.

- `maxMeshOutputPrimitives` is the maximum number of primitives a mesh shader output can store.

- `maxMeshMultiviewViewCount` is the maximum number of multiview views a mesh shader can use.

- `meshOutputPerVertexGranularity` is the granularity with which mesh vertex outputs are allocated. The value can be used to compute the memory size used by the mesh shader, which must be less than or equal to `maxMeshTotalMemorySize`.

- `meshOutputPerPrimitiveGranularity` is the granularity with which mesh outputs qualified as per-primitive are allocated. The value can be used to compute the memory size used by the mesh shader, which must be less than or equal to `maxMeshTotalMemorySize`.

## Description

If the `VkPhysicalDeviceMeshShaderPropertiesNV` structure is included in the `pNext` chain of the VkPhysicalDeviceProperties2 structure passed to vkGetPhysicalDeviceProperties2, it is filled in with each corresponding implementation-dependent property.

Valid Usage (Implicit)

- VUID-VkPhysicalDeviceMeshShaderPropertiesNV-sType-sType
  `sType` must be `VK_STRUCTURE_TYPE_PHYSICAL_DEVICE_MESH_SHADER_PROPERTIES_NV`

## See Also

VK_NV_mesh_shader, VkStructureType

## 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

Copyright 2014-2025 The Khronos Group Inc.

SPDX-License-Identifier: CC-BY-4.0