RenderTarget::Image doesn't support Rgba8Unorm and Bgra8Unorm texture formats (non-srgb formats)

[MatrixDev]

Bevy version

0.14.2

[Optional] Relevant system information

If you cannot get Bevy to build or run on your machine, please include:

• the Rust version you're using (you can get this by running cargo --version)
  cargo 1.81.0 (2dbb1af80 2024-08-20)
• the operating system or browser used, including its version
  SystemInfo { os: "MacOS 14.1.1 ", kernel: "23.1.0", cpu: "Apple M1 Max", core_count: "10", memory: "64.0 GiB" }

If your bug is rendering-related, copy the adapter info that appears when you run Bevy.

AdapterInfo { name: "Apple M1 Max", vendor: 0, device: 0, device_type: IntegratedGpu, driver: "", driver_info: "", backend: Metal }

What you did

Change image format from Bgra8UnormSrgb to Rgba8Unorm or Bgra8Unorm and run the render_to_texture example:

cargo run --example render_to_texture

What went wrong

Example doesn't work.

2024-09-14T19:08:34.923526Z ERROR wgpu::backend::wgpu_core: Handling wgpu errors as fatal by default
thread '<unnamed>' panicked at /Users/matrixdev/.cargo/registry/src/index.crates.io-6f17d22bba15001f/wgpu-22.1.0/src/backend/wgpu_core.rs:3411:5:
wgpu error: Validation Error

Caused by:
  In RenderPass::end
    In a set_pipeline command
      Render pipeline targets are incompatible with render pass
        Incompatible color attachments at indices [0]: the RenderPass uses textures with formats [Some(Bgra8Unorm)] but the RenderPipeline with 'blit pipeline' label uses attachments with formats [Some(Bgra8UnormSrgb)]

Additional information

I saw PR #6380 that should fix this problem and it partially does fix it - I can set R32Float or Rg32Float and it works.

Why do I want non-srgb texture format? Because I want to feed output image to a compute shader but those don't support srgb texture storages.