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MSL writer for mesh shaders #8493

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@inner-daemons
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@inner-daemons inner-daemons commented Nov 7, 2025 •
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Connections
Works towards #7197
Depends on #8139
Depends on #8370

Description
Adds mesh shader capabilities to naga's MSL writer.

Status
This PR is barely started. It cannot be meaningfully reviewed at this point.

Testing
Snapshots, tests now use mesh shader WGSL

Squash or Rebase?
Squash

Checklist

  • Run cargo fmt.
  • Run taplo format.
  • Run cargo clippy --tests. If applicable, add:
    • --target wasm32-unknown-unknown
  • Run cargo xtask test to run tests.
  • If this contains user-facing changes, add a CHANGELOG.md entry.

inner-daemons and others added 30 commits August 14, 2025 12:53
@inner-daemons
Initial commit
1c90d19
@inner-daemons
Other initial changes
8c3e550
@inner-daemons
Updated shader snapshots
85bbc5a
@inner-daemons
Added new HLSL limitation
ccf8467
@inner-daemons
Moved error to global variable error
e55c02f
@inner-daemons
Merge branch 'trunk' into mesh-shading/naga-ir
f3a31a4
@inner-daemons
Added docs to per_primitive
0f6da75
@inner-daemons
Added a little bit more docs here and there in IR
3017214
@inner-daemons
Merge branch 'trunk' into mesh-shading/naga-ir
19b55b5
@inner-daemons
Adding validation to ensure that task shaders have a task payload
198437b
@inner-daemons
Updated spec to reflect the change to payload variables
64000e4
@inner-daemons
Merge branch 'trunk' into mesh-shading/naga-ir
0575e98
@inner-daemons
Updated the mesh shading spec because it was goofy
b572ec7
@inner-daemons
Merge branch 'trunk' into mesh-shading/naga-ir
34d0411
@inner-daemons
Wait did I break it
45fbacc
@inner-daemons
More work
611c01a
@inner-daemons
Oops
3d36680
@inner-daemons
Another refactor
c9c39fd
@inner-daemons
Another slight refactor
fb33028
@inner-daemons
Another slight refactor
ece1ea1
@inner-daemons
Fixed it
47c187b
@inner-daemons
Worked a little more on trying to add it to example
8bc63b6
@inner-daemons
Fixed metal shader
55d6bf3
@inner-daemons
Fixed some passthrough stuff, now it runs (uggh)
edfd494
@inner-daemons
Merge branch 'trunk' into mesh-shading/naga-ir
02664e4
@inner-daemons
Merge branch 'trunk' into mesh-shading/metal
6545fc3
@inner-daemons
Small update to test shader (still blank screen)
d4725b1
@inner-daemons
Another quick update to the shader
7efae60
@inner-daemons
Made mesh shader tests get skipped on metal due to not having MSL pas…
bd79d51 
…sthrough yet
@inner-daemons
Add changelog entry
760de4b
inner-daemons and others added 27 commits October 29, 2025 15:02
@inner-daemons
Updated feature check to hopefully fix CI
6937fa2
@inner-daemons
Smartified mesh shader detection
8bbcea0
@inner-daemons
Nicified some stuff
b4abddd
@inner-daemons
Merge branch 'trunk' into mesh-shading/metal
e613dff
@inner-daemons
Merge remote-tracking branch 'upstream/trunk' into mesh-shading/wgsl-…
0fd0fdd 
…parse
@inner-daemons
Fixed bad validation, formatted mesh shader wgsl
e100034
@inner-daemons
Rewrote the IR and parser significantly
edea07e
@inner-daemons
Improved validation slightly, remvoed obselete crap, fixed bug in com…
3905ae8 
…paction, made clippy happy
@inner-daemons
Merge remote-tracking branch 'upstream/trunk' into mesh-shading/wgsl-…
8f6332d 
…parse
@inner-daemons
Added changelog entry
64798dd
@inner-daemons
Merge branch 'trunk' into mesh-shading/wgsl-parse
c8dccd3
@inner-daemons
Merge remote-tracking branch 'upstream/trunk' into mesh-shading/metal
7219f95
@inner-daemons
Made parser respect enable extension
bd923cd
@inner-daemons
Updated mesh shader spec
d95070a
@inner-daemons
Cleaned up the mesh shader analyzer function
ace7e17
@inner-daemons
Merge branch 'trunk' into mesh-shading/wgsl-parse
f55dbd9
@inner-daemons
Merge branch 'trunk' into mesh-shading/wgsl-parse
bd965a7
@inner-daemons
Updated changelog
c0278f3
@inner-daemons
Merge branch 'trunk' into mesh-shading/wgsl-parse
ab69a74
@inner-daemons
Updated validation from spv-write
e7dc9e5
@inner-daemons
Slight tweaks
592ac16
@inner-daemons
Merge branch 'mesh-shading/metal' into mesh-shading/msl-write
9d1c2bb
@inner-daemons
Initial changes to setup, tests, examples (no changes to logic)
f0e48af
@inner-daemons
Added capabilitiy thing blah blah blah
4398171
@inner-daemons
Merge branch 'mesh-shading/wgsl-parse' into mesh-shading/msl-write
6fa7339
@inner-daemons
Got snapshots to write (not correctly)
106ae83
@inner-daemons
Added changelog entry
b699a30
@inner-daemons inner-daemons mentioned this pull request Nov 8, 2025
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@inner-daemons @cwfitzgerald @jimblandy