SPV_NV_mesh

Name Strings

SPV_NV_mesh_shader

Contact

To report problems with this extension, please open a new issue at:

https://github.com/KhronosGroup/SPIRV-Registry

Contributors

Daniel Koch, NVIDIA
Christoph Kubisch, NVIDIA
Jeff Bolz, NVIDIA
John Kessenich, Google
Sahil Parmar, NVIDIA

Status

Complete

Version

Last Modified Date

2018-10-04

Revision

Dependencies

This extension is written against the SPIR-V Specification, Version 1.3, Revision 2, Unified.

This extension requires SPIR-V 1.0.

This extension interacts with SPV_NV_viewport_array2.

This extension interacts with SPV_EXT_shader_viewport_index_layer.

This extension interacts with SPV_NVX_multiview_per_view_attributes.

This extension interacts with SPIR-V 1.2 (LocalSizeId).

This extension interacts with SPIR-V 1.3 and SPV_KHR_shader_draw_parameters (DrawIndex).

Overview

This extensions provides SPIR-V support for the GLSL GL_NV_mesh_shader extension which adds two new programmable shader types — task and mesh shaders — which are used instead of the standard programmable vertex processing pipeline. Both new shader types have execution environments similar to that of compute shaders.

This extension enables or adds the following functionality under the new MeshShadingNV capability:

adds TaskNV and MeshNV Execution Models for task and mesh shaders, respectively
adds OutputLinesNV, OutputTrianglesNV, and OutputPrimitivesNV Execution Modes for mesh shaders
enables LocalSize, LocalSizeId, OutputVertices, and OutputPoints Execution Modes for mesh and/or task shaders
adds PerPrimitiveNV, PerViewNV, PerTaskNV decorations for input and/or output variables
adds TaskCountNV, PrimitiveCountNV, PrimitiveIndicesNV, ClipDistancePerViewNV, CullDistancePerViewNV, LayerPerViewNV, MeshViewCountNV, and MeshViewIndicesNV builtins in mesh and/or task shaders
enables Position, PointSize, ClipDistance, CullDistance, PrimitiveId, Layer, ViewportIndex, WorkgroupSize, WorkgroupId, LocalInvocationId, GlobalInvocationId, LocalInvocationIndex, DrawIndex, ViewportMaskNV, PositionPerViewNV, and ViewportMaskPerViewNV in mesh and/or task shaders
adds the OpWritePackedPrimitiveIndices4x8NV instruction

Extension Name

To use this extension within a SPIR-V module, the following OpExtension must be present in the module:

OpExtension "SPV_NV_mesh_shader"

Modifications to the SPIR-V Specification, Version 1.3

(Modify Section 2.16.2, Validation Rules for Shader Capabilities)

(Add new items under "Entry point and execution model")

Each OpEntryPoint with the MeshNV Execution Model must have an OpExecutionMode with exactly one of OutputPoints, OutputLinesNV, or OutputTrianglesNV execution modes.
Each OpEntryPoint with the MeshNV Execution Model must specify both the OutputPrimitivesNV and OutputVertices execution modes.

(Add new items under "Decorations")

The PerPrimitiveNV decoration can only be used in the Output Storage Class in a MeshNV Execution Model and can only be used in the Input Storage Class in the Fragment Execution Model.
The PerViewNV decoration can only be used in the Output Storage Class in the MeshNV Execution Model.
The PerTaskNV decoration can only be used in the Output Storage Class in the TaskNV Execution Model and can only be used in the Input Storage Class in the MeshNV Execution Model.

(Modify Section 3.3, Execution Model, adding 2 new rows to the table)

Execution Model	Enabling Capabilities
5267	TaskNV Task shading stage.	MeshShadingNV
5268	MeshNV Mesh shading stage.	MeshShadingNV

Execution Model

Enabling Capabilities

5267

TaskNV
Task shading stage.

MeshShadingNV

5268

MeshNV
Mesh shading stage.

MeshShadingNV

(Modify Section 3.6, Execution Mode)

(add new rows to the Execution Mode table)

Execution Mode	Enabling Capabilities	Extra Operands
5269	OutputLinesNV Stage output primitive is lines. Only valid with the MeshNV Execution Model.	MeshShadingNV
5298	OutputTrianglesNV Stage output primitive is triangles. Only valid with the MeshNV Execution Model.	MeshShadingNV
5270	OutputPrimitivesNV For the mesh stage, the maximum number of primitives the shader will ever emit for the invocation group. Only valid with the MeshNV Execution Model.	MeshShadingNV	Literal Number Primitive count

Execution Mode

Enabling Capabilities

Extra Operands

5269

OutputLinesNV
Stage output primitive is lines. Only valid with the MeshNV Execution Model.

MeshShadingNV

5298

OutputTrianglesNV
Stage output primitive is triangles. Only valid with the MeshNV Execution Model.

MeshShadingNV

5270

OutputPrimitivesNV
For the mesh stage, the maximum number of primitives the shader will ever emit for the invocation group. Only valid with the MeshNV Execution Model.

MeshShadingNV

Literal Number
Primitive count

(Modify the definition of LocalSize, OutputVertices, OutputPoints, and LocalSizeId as follows, allowing them to be outputs from MeshNV and/or TaskNV shaders)

Execution Mode	Enabling Capabilities	Extra Operands
17	LocalSize Indicates the work-group size in the x, y, and z dimensions. Only valid with the GLCompute, MeshNV, TaskNV or Kernel Execution Models.		Literal Number x size	Literal Number y size	Literal Number z size
26	OutputVertices Only valid with the Geometry, TessellationControl, TessellationEvaluation, or MeshNV Execution Models.		Literal Number Vertex count
For a geometry stage, the maximum number of vertices the shader will ever emit in a single invocation.	Geometry
For a tessellation-control stage, the number of vertices in the output patch produced by the tessellation control shader, which also specifies the number of times the tessellation control shader is invoked.	Tessellation
For a mesh stage, the maximum number of vertices the shader will ever emit for the invocation group.	MeshShadingNV
27	OutputPoints Stage output primitive is points. Only valid with the Geometry and MeshNV Execution Models.	Geometry, MeshShadingNV
38	LocalSizeId Indicates the work-group size in the x, y, and z dimensions. Only valid with the GLCompute, MeshNV, TaskNV or Kernel Execution Models. Specified as Ids.	Missing before version 1.2.	<id> x size	<id> y size	<id> z size

Execution Mode

Enabling Capabilities

Extra Operands

LocalSize
Indicates the work-group size in the x, y, and z dimensions. Only valid with the GLCompute, MeshNV, TaskNV or Kernel Execution Models.

Literal Number
x size

Literal Number
y size

Literal Number
z size

OutputVertices
Only valid with the Geometry, TessellationControl, TessellationEvaluation, or MeshNV Execution Models.

Literal Number
Vertex count

For a geometry stage, the maximum number of vertices the shader will ever emit in a single invocation.

Geometry

For a tessellation-control stage, the number of vertices in the output patch produced by the tessellation control shader, which also specifies the number of times the tessellation control shader is invoked.

Tessellation

For a mesh stage, the maximum number of vertices the shader will ever emit for the invocation group.

MeshShadingNV

OutputPoints
Stage output primitive is points. Only valid with the Geometry and MeshNV Execution Models.

Geometry, MeshShadingNV

LocalSizeId
Indicates the work-group size in the x, y, and z dimensions. Only valid with the GLCompute, MeshNV, TaskNV or Kernel Execution Models.

Specified as Ids.

Missing before version 1.2.

<id>
x size

<id>
y size

<id>
z size

(Modify Section 3.20, Decoration, adding new rows to the Decoration table)

Decoration	Enabling Capabilities	Extra Operands
5271	PerPrimitiveNV Must only be used on a memory object declaration or a member of a structure type. Indicates that the variable has separate instances for each primitive in the mesh output. Only valid for the Input and Output Storage Classes.	MeshShadingNV
5272	PerViewNV Must only be used on a memory object declaration or a member of a structure type. Indicates that the variable has separate instances for each view in the mesh output. Only valid for the Output Storage Class.	MeshShadingNV
5273	PerTaskNV Must only be used on a memory object declaration or a member of a structure type. Indicates that the variable is stored in task memory. Only valid for the Input and Output Storage Classes.	MeshShadingNV

Decoration

Enabling Capabilities

Extra Operands

5271

PerPrimitiveNV
Must only be used on a memory object declaration or a member of a structure type. Indicates that the variable has separate instances for each primitive in the mesh output. Only valid for the Input and Output Storage Classes.

MeshShadingNV

5272

PerViewNV
Must only be used on a memory object declaration or a member of a structure type. Indicates that the variable has separate instances for each view in the mesh output. Only valid for the Output Storage Class.

MeshShadingNV

5273

PerTaskNV
Must only be used on a memory object declaration or a member of a structure type. Indicates that the variable is stored in task memory. Only valid for the Input and Output Storage Classes.

MeshShadingNV

(Modify Section 3.21, BuiltIn)

(add a new rows to the Builtin table)

BuiltIn	Enabling Capabilities	Enabled by Extension
5274	TaskCountNV Output task count in the TaskNV Execution Model. See the Vulkan API specification for more detail.	MeshShadingNV	SPV_NV_mesh_shader
5275	PrimitiveCountNV Output primitive count in the MeshNV Execution Model. See the Vulkan API specification for more detail.	MeshShadingNV	SPV_NV_mesh_shader
5276	PrimitiveIndicesNV Output array of vertex index values in the MeshNV Execution Model. See the Vulkan API specification for more detail.	MeshShadingNV	SPV_NV_mesh_shader
5277	ClipDistancePerViewNV Output array of clip distances for each view in the MeshNV Execution Model. See the Vulkan API specification for more detail.	MeshShadingNV	SPV_NV_mesh_shader
5278	CullDistancePerViewNV Output array of cull distances for each view in the MeshNV Execution Model. See the Vulkan API specification for more detail.	MeshShadingNV	SPV_NV_mesh_shader
5279	LayerPerViewNV Output array of layer selection for each view in the MeshNV Execution Model. See the Vulkan API specification for more detail.	MeshShadingNV	SPV_NV_mesh_shader
5280	MeshViewCountNV Input view count in the TaskNV and MeshNV Execution Models. See the Vulkan API specification for more detail.	MeshShadingNV	SPV_NV_mesh_shader
5281	MeshViewIndicesNV Input array of view index values in the TaskNV and MeshNV Execution Models. See the Vulkan API specification for more detail.	MeshShadingNV	SPV_NV_mesh_shader

BuiltIn

Enabling Capabilities

Enabled by Extension

5274

TaskCountNV
Output task count in the TaskNV Execution Model. See the Vulkan API specification for more detail.

MeshShadingNV

SPV_NV_mesh_shader

5275

PrimitiveCountNV
Output primitive count in the MeshNV Execution Model. See the Vulkan API specification for more detail.

MeshShadingNV

SPV_NV_mesh_shader

5276

PrimitiveIndicesNV
Output array of vertex index values in the MeshNV Execution Model. See the Vulkan API specification for more detail.

MeshShadingNV

SPV_NV_mesh_shader

5277

ClipDistancePerViewNV
Output array of clip distances for each view in the MeshNV Execution Model. See the Vulkan API specification for more detail.

MeshShadingNV

SPV_NV_mesh_shader

5278

CullDistancePerViewNV
Output array of cull distances for each view in the MeshNV Execution Model. See the Vulkan API specification for more detail.

MeshShadingNV

SPV_NV_mesh_shader

5279

LayerPerViewNV
Output array of layer selection for each view in the MeshNV Execution Model. See the Vulkan API specification for more detail.

MeshShadingNV

SPV_NV_mesh_shader

5280

MeshViewCountNV
Input view count in the TaskNV and MeshNV Execution Models. See the Vulkan API specification for more detail.

MeshShadingNV

SPV_NV_mesh_shader

5281

MeshViewIndicesNV
Input array of view index values in the TaskNV and MeshNV Execution Models. See the Vulkan API specification for more detail.

MeshShadingNV

SPV_NV_mesh_shader

(Modify the definition of following BuiltIns, allowing them to be used in TaskNV and/or MeshNV Execution Models.)

BuiltIn	Enabling Capabilities	Enabled by Extension
0	Position Vertex position. See Vulkan or OpenGL API specifications for more detail.
Position input or output from a vertex processing Execution Model.	Shader
Position output from a MeshNV Execution Model	MeshShadingNV	SPV_NV_mesh_shader
1	PointSize Vertex point size. See Vulkan or OpenGL API specifications for more detail.
Point size input or output from a vertex processing Execution Model.	Shader
Point size output from a MeshNV Execution Model	MeshShadingNV	SPV_NV_mesh_shader
3	ClipDistance Array of clip distances. See Vulkan or OpenGL API specifications for more detail.
Clip distances input or output from a vertex processing Execution Model	ClipDistance
Clip distances output from a MeshNV Execution Model	MeshShadingNV	SPV_NV_mesh_shader
4	CullDistance Array of cull distances. See Vulkan or OpenGL API specifications for more detail.
Cull distances input or output from a vertex processing Execution Model	CullDistance
Cull distances output from a MeshNV Execution Model	MeshShadingNV	SPV_NV_mesh_shader
7	PrimitiveId Primitive identifier. See Vulkan or OpenGL API specifications for more detail.
Primitive ID in a Geometry Execution Model	Geometry
Primitive ID in a Tessellation Execution Model	Tessellation
Primitive ID output in a MeshNV Execution Model	MeshShadingNV	SPV_NV_mesh_shader
9	Layer Layer selection for multi-layer framebuffer. See Vulkan or OpenGL API specification for more detail.
Layer output by a Geometry Execution Model, input to a Fragment Execution Model.	Geometry
Layer output by a Vertex or Tessellation Execution Model.	ShaderViewportIndexLayerEXT	SPV_EXT_shader_viewport_index_layer
Layer output by a MeshNV Execution Model.	ShaderViewportIndexLayerEXT MeshShadingNV	SPV_EXT_shader_viewport_index_layer SPV_NV_mesh_shader
10	ViewportIndex Viewport selection for viewport transformation when using multiple viewports. See Vulkan or OpenGL API specification for more detail.
Viewport index output by a Geometry Execution Model, input to a Fragment Execution Model.	MultiViewport
Viewport index output by a Vertex or Tessellation Execution Model.	ShaderViewportIndexLayerEXT	SPV_EXT_shader_viewport_index_layer
Viewport index output by a MeshNV Execution Model	ShaderViewportIndexLayerEXT MeshShadingNV	SPV_EXT_shader_viewport_index_layer SPV_NV_mesh_shader
25	WorkgroupSize Work-group size in GLCompute or Kernel Execution Models. See OpenCL, Vulkan, or OpenGL API specifications for more detail.
Work-group size in TaskNV or MeshNV Execution Models. See Vulkan API specification for more detail.	MeshShadingNV	SPV_NV_mesh_shader
26	WorkgroupId Work-group ID in GLCompute or Kernel Execution Models. See OpenCL, Vulkan, or OpenGL API specifications for more detail.
Work-group ID in TaskNV or MeshNV Execution Models. See Vulkan API specification for more detail.	MeshShadingNV	SPV_NV_mesh_shader
27	LocalInvocationId Local invocation ID in GLCompute or Kernel Execution Models. See OpenCL, Vulkan, or OpenGL API specifications for more detail.
Local invocation ID in TaskNV or MeshNV Execution Models. See Vulkan API specification for more detail.	MeshShadingNV	SPV_NV_mesh_shader
28	GlobalInvocationId Global invocation ID in GLCompute or Kernel Execution Models. See OpenCL, Vulkan, or OpenGL API specifications for more detail.
Global invocation ID in TaskNV or MeshNV Execution Models.	MeshShadingNV	SPV_NV_mesh_shader
29	LocalInvocationIndex Local invocation index in GLCompute Execution Model. See Vulkan or OpenGL API specifications for more detail. Work-group Linear ID in Kernel Execution Model. See OpenCL API specification for more detail.
Local invocation index in TaskNV or MeshNV Execution Models. See Vulkan API specification for more detail.	MeshShadingNV	SPV_NV_mesh_shader
4426	DrawIndex Contains the index of the draw currently being processed. See the Vulkan 1.1 or OpenGL 4.6 specifications for more details.	DrawParameters Missing before version 1.3.	SPV_KHR_shader_draw_parameters
Draw index in TaskNV or MeshNV Execution Models	DrawParameters MeshShadingNV	SPV_KHR_shader_draw_parameters SPV_NV_mesh_shader
5253	ViewportMaskNV	Reserved
Output viewport mask in Vertex, Tessellation, or Geometry Execution Model. See Vulkan or OpenGL API specifications for more detail.	ShaderViewportMaskNV	SPV_NV_viewport_array2
Output viewport mask in MeshNV Execution Model. See Vulkan API specification for more detail.	ShaderViewportMaskNV MeshShadingNV	SPV_NV_viewport_array2 SPV_NV_mesh_shader
5261	PositionPerViewNV	Reserved
Output vertex position for each view in Vertex, Tessellation, or Geometry Execution Model, and input position for each view in Tessellation and Geometry Execution Models. See Vulkan API specification for more detail.	PerViewAttributesNV	SPV_NVX_multiview_per_view_attributes
Output vertex position for each view in MeshNV Execution Model. See Vulkan API specification for more detail.	PerViewAttributesNV MeshShadingNV	SPV_NVX_multiview_per_view_attributes SPV_NV_mesh_shader
5262	ViewportMaskPerViewNV	Reserved
Output viewport mask for each view in Vertex, Tessellation, or Geometry Execution Model. See Vulkan API specification for more detail.	PerViewAttributesNV	SPV_NVX_multiview_per_view_attributes
Output viewport mask for each view in MeshNV Execution Model. See Vulkan API specification for more detail.	PerViewAttributesNV MeshShadingNV	SPV_NVX_multiview_per_view_attributes SPV_NV_mesh_shader

BuiltIn

Enabling Capabilities

Enabled by Extension

Position
Vertex position. See Vulkan or OpenGL API specifications for more detail.

Position input or output from a vertex processing Execution Model.

Shader

Position output from a MeshNV Execution Model

MeshShadingNV

SPV_NV_mesh_shader

PointSize
Vertex point size. See Vulkan or OpenGL API specifications for more detail.

Point size input or output from a vertex processing Execution Model.

Shader

Point size output from a MeshNV Execution Model

MeshShadingNV

SPV_NV_mesh_shader

ClipDistance
Array of clip distances. See Vulkan or OpenGL API specifications for more detail.

Clip distances input or output from a vertex processing Execution Model

ClipDistance

Clip distances output from a MeshNV Execution Model

MeshShadingNV

SPV_NV_mesh_shader

CullDistance
Array of cull distances. See Vulkan or OpenGL API specifications for more detail.

Cull distances input or output from a vertex processing Execution Model

CullDistance

Cull distances output from a MeshNV Execution Model

MeshShadingNV

SPV_NV_mesh_shader

PrimitiveId
Primitive identifier. See Vulkan or OpenGL API specifications for more detail.

Primitive ID in a Geometry Execution Model

Geometry

Primitive ID in a Tessellation Execution Model

Tessellation

Primitive ID output in a MeshNV Execution Model

MeshShadingNV

SPV_NV_mesh_shader

Layer
Layer selection for multi-layer framebuffer. See Vulkan or OpenGL API specification for more detail.

Layer output by a Geometry Execution Model, input to a Fragment Execution Model.

Geometry

Layer output by a Vertex or Tessellation Execution Model.

ShaderViewportIndexLayerEXT

SPV_EXT_shader_viewport_index_layer

Layer output by a MeshNV Execution Model.

ShaderViewportIndexLayerEXT MeshShadingNV

SPV_EXT_shader_viewport_index_layer SPV_NV_mesh_shader

ViewportIndex
Viewport selection for viewport transformation when using multiple viewports. See Vulkan or OpenGL API specification for more detail.

Viewport index output by a Geometry Execution Model, input to a Fragment Execution Model.

MultiViewport

Viewport index output by a Vertex or Tessellation Execution Model.

ShaderViewportIndexLayerEXT

SPV_EXT_shader_viewport_index_layer

Viewport index output by a MeshNV Execution Model

ShaderViewportIndexLayerEXT MeshShadingNV

SPV_EXT_shader_viewport_index_layer SPV_NV_mesh_shader

WorkgroupSize
Work-group size in GLCompute or Kernel Execution Models. See OpenCL, Vulkan, or OpenGL API specifications for more detail.

Work-group size in TaskNV or MeshNV Execution Models. See Vulkan API specification for more detail.

MeshShadingNV

SPV_NV_mesh_shader

WorkgroupId
Work-group ID in GLCompute or Kernel Execution Models. See OpenCL, Vulkan, or OpenGL API specifications for more detail.

Work-group ID in TaskNV or MeshNV Execution Models. See Vulkan API specification for more detail.

MeshShadingNV

SPV_NV_mesh_shader

LocalInvocationId
Local invocation ID in GLCompute or Kernel Execution Models. See OpenCL, Vulkan, or OpenGL API specifications for more detail.

Local invocation ID in TaskNV or MeshNV Execution Models. See Vulkan API specification for more detail.

MeshShadingNV

SPV_NV_mesh_shader

GlobalInvocationId
Global invocation ID in GLCompute or Kernel Execution Models. See OpenCL, Vulkan, or OpenGL API specifications for more detail.

Global invocation ID in TaskNV or MeshNV Execution Models.

MeshShadingNV

SPV_NV_mesh_shader

LocalInvocationIndex
Local invocation index in GLCompute Execution Model. See Vulkan or OpenGL API specifications for more detail.

Work-group Linear ID in Kernel Execution Model. See OpenCL API specification for more detail.

Local invocation index in TaskNV or MeshNV Execution Models. See Vulkan API specification for more detail.

MeshShadingNV

SPV_NV_mesh_shader

4426

DrawIndex
Contains the index of the draw currently being processed.
See the Vulkan 1.1 or OpenGL 4.6 specifications for more details.

DrawParameters

Missing before version 1.3.

SPV_KHR_shader_draw_parameters

Draw index in TaskNV or MeshNV Execution Models

DrawParameters MeshShadingNV

SPV_KHR_shader_draw_parameters SPV_NV_mesh_shader

5253

ViewportMaskNV

Reserved

Output viewport mask in Vertex, Tessellation, or Geometry Execution Model. See Vulkan or OpenGL API specifications for more detail.

ShaderViewportMaskNV

SPV_NV_viewport_array2

Output viewport mask in MeshNV Execution Model. See Vulkan API specification for more detail.

ShaderViewportMaskNV MeshShadingNV

SPV_NV_viewport_array2 SPV_NV_mesh_shader

5261

PositionPerViewNV

Reserved

Output vertex position for each view in Vertex, Tessellation, or Geometry Execution Model, and input position for each view in Tessellation and Geometry Execution Models. See Vulkan API specification for more detail.

PerViewAttributesNV

SPV_NVX_multiview_per_view_attributes

Output vertex position for each view in MeshNV Execution Model. See Vulkan API specification for more detail.

PerViewAttributesNV MeshShadingNV

SPV_NVX_multiview_per_view_attributes SPV_NV_mesh_shader

5262

ViewportMaskPerViewNV

Reserved

Output viewport mask for each view in Vertex, Tessellation, or Geometry Execution Model. See Vulkan API specification for more detail.

PerViewAttributesNV

SPV_NVX_multiview_per_view_attributes

Output viewport mask for each view in MeshNV Execution Model. See Vulkan API specification for more detail.

PerViewAttributesNV MeshShadingNV

SPV_NVX_multiview_per_view_attributes SPV_NV_mesh_shader

(Modify Section 3.31, Capability, adding a new row to the Capability table)

Capability	Depends On	Enabled by Extension
5266	MeshShadingNV Uses the TaskNV or MeshNV Execution Models.	Shader	SPV_NV_mesh_shader

Capability

Depends On

Enabled by Extension

5266

MeshShadingNV
Uses the TaskNV or MeshNV Execution Models.

Shader

SPV_NV_mesh_shader

(Modify Section 3.32.1, Miscellaneous Instructions, adding a new row to the table)

OpWritePackedPrimitiveIndices4x8NV

Interprets Packed Indices as four 8-bit unsigned integer values and stores them into the output variable decorated with the PrimitiveIndicesNV BuiltIn starting from the byte offset given by Index Offset. The lower bytes of Packed Indices are stored at lower addresses in the output array variable.

Index Offset must be a scalar of 32-bit integer type, whose Signedness operand is 0, and must be a multiple of four.

Packed Indices must be a scalar of 32-bit integer type, whose Signedness operand is 0.

Capability:
MeshShadingNV

5299

<id>
Index Offset

<id>
Packed Indices

Validation Rules

An OpExtension must be added to the SPIR-V for validation layers to check legal use of this extension:

OpExtension "SPV_NV_mesh_shader"

Issues

Should writePackedPrimitiveIndices4x8NV be added as a new core instruction or should it be an extended instruction?

RESOLVED: adding it as a new core instruction as that’s simpler (doesn’t need a new grammar file) and that seems to be what the extension guide recommends.

Revision History

Rev	Date	Author	Changes
1	2018-09-12	Daniel Koch	Internal revisions
2	2018-10-04	Sahil Parmar	Add support for LocalSize and LocalSizeId in TaskNV shaders