Read/Write and Read-Only Storage Texture Error Message Doesn't Say Why

[OneKnightOnly]

Description
R32Uint StorageTexture requires TEXTURE_ADAPTER_SPECIFIC_FORMAT_FEATURES to be enabled.

Repro steps

    let texture = ctx.device.create_texture(&wgpu::TextureDescriptor {
        size: wgpu::Extent3d {
            width: 2,
            height: 2,
            depth_or_array_layers: 2,
        },
        mip_level_count: 1,
        sample_count: 1,
        dimension: wgpu::TextureDimension::D3,
        format: wgpu::TextureFormat::R32Uint,
        usage: wgpu::TextureUsages::TEXTURE_BINDING
            | wgpu::TextureUsages::STORAGE_BINDING
            | wgpu::TextureUsages::COPY_DST,
        label: None,
    });

    let bind_group_layout =
        ctx.device
            .create_bind_group_layout(&wgpu::BindGroupLayoutDescriptor {
                entries: &[wgpu::BindGroupLayoutEntry {
                    binding: 0,
                    visibility: wgpu::ShaderStages::COMPUTE,
                    ty: wgpu::BindingType::StorageTexture {
                        access: wgpu::StorageTextureAccess::ReadWrite,
                        format: wgpu::TextureFormat::R32Uint,
                        view_dimension: wgpu::TextureViewDimension::D3,
                    },
                    count: None,
                }],
                label: None,
            });

Expected vs observed behavior
R32Uint is part of webgpu spec and shouldn't require special features enabled.

Error Messge
In Device::create_bind_group_layout
binding 0 entry is invalid
Features TEXTURE_ADAPTER_SPECIFIC_FORMAT_FEATURES are required but not enabled on the device.

[cwfitzgerald]

Ahh, that's the problem, you're making a read_write storage texture, something that isn't supported in baseline webgpu. The way we current guard this is by the custom features flag. As is obvious, the error message really could be improved for this case. Going to rename and leave open.

[OneKnightOnly]

Oh thats what it is, I just changed the access to writeonly and it works perfectly thanks.

[feresr]

Is there no way to read a texture from a compute shader? (without the feature flag)
how is this usually done in webGPU?

[cwfitzgerald]

If you want to read from a texture, bind it as a normal texture (not a storage texture) and use textureLoad on it