Wgsl Naga - How can I use builtin textureStore() with texture_storage_2d<rgba8uint,write>?

Question

Naga validate this snippet:

    [[group(0), binding(0)]] var output :
    texture_storage_2d<rgba8unorm,write>;
    
    [[stage(compute), workgroup_size(1)]]
    fn main() {
        textureStore(output, vec2<i32>(10,10), vec4<f32>(10.,5.,100.,200.));
    }

Replacing rgba8unorm with rgba8uint makes naga throwing an error.

Entry point main at Compute is invalid:     The value [9] can not be stored
    Generating SPIR-V output requires validation to succeed, and it failed in a previous step

I tried different combinations of scalar with vec4<> in textureStore: i32,u32,f32 but no luck.

Question is: How can I use the builtin function textureStore() with texture_storage_2d<rgba8uint,write> instead of texture_storage_2d<rgba8unorm,write> ?

EDIT: Following Dan answer I tried the following

[[group(0), binding(0)]] var output :
    texture_storage_2d<rgba8uint,write>;
    
    [[stage(compute), workgroup_size(1)]]
    fn main() {
        textureStore(output, vec2<i32>(10,10), vec4<u32>(10u,5u,10u,20u));
    } 

It works!

I tried and failed with textureStore(output, vec2(10,10), vec4(10,5,10,20)); I forgot the u in 10u,5u, etc...

Thanks.

Answer 1

To store in a rgba8uint, you need to use the type vec4<u32>. See here for the corresponding type for each texture storage. If that's not working, you may have a different problem. (Are you passing in 10. etc to the vec4<u32>? It should be 10u. Wgsl is very strict about types.)