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VK_EXT_mesh_shader.adoc

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Other Extension Metadata

Last Modified Date

2022-01-20

Interactions and External Dependencies

  • This extension provides API support for GLSL_EXT_mesh_shader

  • Interacts with Vulkan 1.1

  • Interacts with apiext:VK_KHR_multiview

  • Interacts with apiext:VK_KHR_fragment_shading_rate

Contributors

  • Christoph Kubisch, NVIDIA

  • Pat Brown, NVIDIA

  • Jeff Bolz, NVIDIA

  • Daniel Koch, NVIDIA

  • Piers Daniell, NVIDIA

  • Pierre Boudier, NVIDIA

  • Patrick Mours, NVIDIA

  • David Zhao Akeley, NVIDIA

  • Kedarnath Thangudu, NVIDIA

  • Timur Kristóf, Valve

  • Hans-Kristian Arntzen, Valve

  • Philip Rebohle, Valve

  • Mike Blumenkrantz, Valve

  • Slawomir Grajewski, Intel

  • Michal Pietrasiuk, Intel

  • Mariusz Merecki, Intel

  • Tom Olson, ARM

  • Jan-Harald Fredriksen, ARM

  • Sandeep Kakarlapudi, ARM

  • Ruihao Zhang, QUALCOMM

  • Ricardo Garcia, Igalia, S.L.

  • Tobias Hector, AMD

  • Stu Smith, AMD

Description

This extension provides a new mechanism allowing applications to generate collections of geometric primitives via programmable mesh shading. It is an alternative to the existing programmable primitive shading pipeline, which relied on generating input primitives by a fixed function assembler as well as fixed function vertex fetch.

This extension also adds support for the following SPIR-V extension in Vulkan:

  • {spirv}/EXT/SPV_EXT_mesh_shader.html[SPV_EXT_mesh_shader]

New or Modified Built-In Variables

  • CullPrimitiveEXT

  • PrimitivePointIndicesEXT

  • PrimitiveLineIndicesEXT

  • PrimitiveTriangleIndicesEXT

  • (modified)code:Position

  • (modified)code:PointSize

  • (modified)code:ClipDistance

  • (modified)code:CullDistance

  • (modified)code:PrimitiveId

  • (modified)code:Layer

  • (modified)code:ViewportIndex

  • (modified)code:NumWorkgroups

  • (modified)code:WorkgroupSize

  • (modified)code:WorkgroupId

  • (modified)code:LocalInvocationId

  • (modified)code:GlobalInvocationId

  • (modified)code:LocalInvocationIndex

  • (modified)code:NumSubgroups

  • (modified)code:SubgroupId

  • (modified)code:DrawIndex

  • (modified)code:PrimitiveShadingRateKHR

  • (modified)code:ViewIndex

New SPIR-V Capability

Version History

  • Revision 1, 2022-03-08 (Christoph Kubisch, Daniel Koch, Patrick Mours)

    • Initial revision