Initial support for VK_EXT_mesh_shader

zeux / niagara

A Vulkan renderer written from scratch on stream

MIT License

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Initial support for VK_EXT_mesh_shader #27

Closed zeux closed 2 years ago

zeux commented 2 years ago

Updates volk to latest to gain support for VK_EXT_mesh_shader
Switches extension usage from NV to EXT (initialization, shader parsing, indirect dispatch args)
Switches shaders from NV to EXT
Removes use of ballot from task shader and instead uses atomics (ballot is rather error prone once you stop assuming all hardware looks like NV...)

zeux commented 2 years ago

This works without issues on radv (with rather suboptimal performance, but that's something to investigate separately). I'd expect NV drivers to have comparable performance short of potential issues with index packing, since I'm not clear on whether applications are expected to somehow write 4b aligned triangle index blocks through the new interface or not.