VK_EXT_mesh_shader
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 VK_KHR_multiview
- Interacts with 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:
New Commands
New Structures
- VkDrawMeshTasksIndirectCommandEXT
- Extending VkPhysicalDeviceFeatures2, VkDeviceCreateInfo:
- Extending VkPhysicalDeviceProperties2:
New Enum Constants
VK_EXT_MESH_SHADER_EXTENSION_NAME
VK_EXT_MESH_SHADER_SPEC_VERSION
- Extending VkPipelineStageFlagBits:
VK_PIPELINE_STAGE_MESH_SHADER_BIT_EXT
VK_PIPELINE_STAGE_TASK_SHADER_BIT_EXT
- Extending VkQueryPipelineStatisticFlagBits:
VK_QUERY_PIPELINE_STATISTIC_MESH_SHADER_INVOCATIONS_BIT_EXT
VK_QUERY_PIPELINE_STATISTIC_TASK_SHADER_INVOCATIONS_BIT_EXT
- Extending VkQueryType:
VK_QUERY_TYPE_MESH_PRIMITIVES_GENERATED_EXT
- Extending VkShaderStageFlagBits:
VK_SHADER_STAGE_MESH_BIT_EXT
VK_SHADER_STAGE_TASK_BIT_EXT
- Extending VkStructureType:
VK_STRUCTURE_TYPE_PHYSICAL_DEVICE_MESH_SHADER_FEATURES_EXT
VK_STRUCTURE_TYPE_PHYSICAL_DEVICE_MESH_SHADER_PROPERTIES_EXT
If VK_NV_device_generated_commands is supported:
- Extending VkIndirectCommandsTokenTypeNV:
VK_INDIRECT_COMMANDS_TOKEN_TYPE_DRAW_MESH_TASKS_NV
New or Modified Built-In Variables
- CullPrimitiveEXT
- PrimitivePointIndicesEXT
- PrimitiveLineIndicesEXT
- PrimitiveTriangleIndicesEXT
- (modified)
Position
- (modified)
PointSize
- (modified)
ClipDistance
- (modified)
CullDistance
- (modified)
PrimitiveId
- (modified)
Layer
- (modified)
ViewportIndex
- (modified)
NumWorkgroups
- (modified)
WorkgroupSize
- (modified)
WorkgroupId
- (modified)
LocalInvocationId
- (modified)
GlobalInvocationId
- (modified)
LocalInvocationIndex
- (modified)
NumSubgroups
- (modified)
SubgroupId
- (modified)
DrawIndex
- (modified)
PrimitiveShadingRateKHR
- (modified)
ViewIndex
New SPIR-V Capability
Version History
- Revision 1, 2022-03-08 (Christoph Kubisch, Daniel Koch, Patrick Mours)
- Initial revision