WGSL textureStore function not recognized.

[5nefarious]

I'm trying to render to a storage texture inside a compute shader using the textureStore function, documented here. Compilation throws the following error:

ERROR wgpu_core::device: Failed to parse WGSL code: error while parsing WGSL in scopes [FunctionDecl, Block, Statement] at line 10 pos 16: unknown identifier: `textureStore`
wgpu error: Validation Error

Has this function been implemented as of v0.7? If not, then does anyone have any recommendations for what I should do instead?

[kvark]

It was implemented in https://github.com/gfx-rs/naga/pull/465, which landed before Naga-0.3.0 was published. I highly recommend using master branch if you can. Alternatively, you'd have to resort to SPIR-V as a workaround. You can even keep the shader in WGSL, but add a build step using the latest Naga from master that would translate it to SPIR-V that you feed into wgpu-0.7. Would any of this work for you?

[5nefarious]

I would like to update wgpu-rs to master, but I think I'm stuck with v0.7.

error: failed to select a version for `web-sys`.
    ... required by package `wasm-bindgen-futures v0.4.23`
    ... which is depended on by `wgpu v0.7.0 (https://github.com/gfx-rs/wgpu-rs.git#841a610a)`
    ... which is depended on by `render-test v0.1.0 (/Users/REDACTED/Code/bevy/render-test)`
versions that meet the requirements `=0.3.46` are: 0.3.46

all possible versions conflict with previously selected packages.

  previously selected package `web-sys v0.3.50`
    ... which is depended on by `wgpu v0.7.0 (https://github.com/gfx-rs/wgpu-rs.git#841a610a)`
    ... which is depended on by `render-test v0.1.0 (/Users/REDACTED/Code/bevy/render-test)`

failed to select a version for `web-sys` which could resolve this conflict

How would I add the Naga build step?

[kvark]

Your error message looks suspicious. wgpu from master has to build by itself, we check it on CI. If there is nothing in your code that depends on web-sys, then there should be no conflicts either. cc @grovesNL

How would I add the Naga build step?

[build-dependencies.naga]
git = "https://github.com/gfx-rs/naga"
rev = "xxx"
features = ["wgsl-in", "spv-out"]

Then follow the path of https://github.com/gfx-rs/naga/blob/057fa336a8ae3e2006717460307fd6f8a7026bcb/bin/convert.rs#L209 from WGSL to SPV

[5nefarious]

@kvark, thanks for the help. As it turns out, I can update wgpu-rs to master by disabling most of the features in Bevy and building it without its own rendering infrastructure. This seemed to eliminate the dependency conflicts.

[kvark]

Ok, good. Let's close this issue then. textureStore was not included in the release, and it's not a bug to fix.