[wgpu-core] Compute minimum binding size correctly for arrays. #5222
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nical
approved these changes
Feb 8, 2024
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@jimblandy: Looks like Windows CI is failing, and it's relevant? https://github.com/gfx-rs/wgpu/actions/runs/7822956888/job/21349870422?pr=5222#step:13:4146 |
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Hoho, maybe we can reliably reproduce #3193 now?? |
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In early versions of WGSL, `storage` or `uniform` global variables had to be either structs or runtime-sized arrays. This rule was relaxed, and now globals can have any type; Naga automatically wraps such variables in structs when required by the backend shading language. Under the old rules, whenever wgpu-core saw a `storage` or `uniform` global variable with an array type, it could assume it was a runtime-sized array, and take the stride as the minimum binding size. Under the new rules, wgpu-core must consider fixed-sized and runtime-sized arrays separately. Fixes gfx-rs#5219.
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In early versions of WGSL,
storageoruniformglobal variables hadto be either structs or runtime-sized arrays. This rule was relaxed,
and now globals can have any type; Naga automatically wraps such
variables in structs when required by the backend shading language.
Under the old rules, whenever wgpu-core saw a
storageoruniformglobal variable with an array type, it could assume it was a
runtime-sized array, and take the stride as the minimum binding size.
Under the new rules, wgpu-core must consider fixed-sized and
runtime-sized arrays separately.
Checklist
cargo fmt.cargo clippy.cargo xtask testto run tests.CHANGELOG.md. See simple instructions inside file.