Running the msaa-line example in firefox has no multi-sample effect

[jinleili]

Description
msaa-line runs perfectly on macOS native, but running on ff via cargo run-wasm --example mass-line has no effect.

surface.get_preferred_format(&adapter).unwrap() equals Bgra8UnormSrgb and Bgra8Unorm on native and in the firefox, respectively. If modified configuration.format from surface.get_preferred_format(&adapter).unwrap() to Bgra8UnormSrgb, running in firefox also perfectly.

Spec says:

Note: Canvas configuration cannot use srgb formats like bgra8unorm-srgb. Instead, use the non-srgb equivalent (bgra8unorm), specify the srgb format in the viewFormats, and use createView() to create a view with an srgb format.

Does that mean that xx needs to be automatically reinterpreted as xx-srgb?

Platform
macOS, native + Firefox Nightly 102.0a1 (2022-05-16) (64-bit)

[cwfitzgerald]

That image is actually multi-sampled, but it's just multi-sampled in the wrong color space compared to the native ones, so the colors look different.

The problem with srgb is a keeping-up-with-the-spec issue and is covered by #2170