Is it possible to set viewformat on a texture configuration?

[mreinstein]

On Linux/Vulkan, the getPreferredFormat() returns bgra8unorm-srgb. On other platforms it returns the non -srgb equivalent format.

I want to avoid srgb because I have a bloom/HDR pipeline that specifies gamma correction manually, and the srgb format applies gamma correction automatically on the gpu. I'm essentially getting double gamma correction only on linux.

The webgpu spec defines (https://www.w3.org/TR/webgpu/#texture-view-format-compatible) bgra8unorm and bgra8unorm-srgb as view-format-compatible, and browsers allow this when the canvas is configured with viewFormats.

[mreinstein]

like somewhere around here

gpu/dawn.patch

Line 404 in 84ebcd9

+ wgpuConfig.format = _wgpuPreferredFormat;

being able to pass in

WGPUTextureFormat viewFormats[1];

if (_wgpuPreferredFormat == WGPUTextureFormat_BGRA8UnormSrgb) {
    viewFormats[0] = WGPUTextureFormat_BGRA8Unorm;
    wgpuConfig.viewFormatCount = 1;
    wgpuConfig.viewFormats = viewFormats;
} else if (_wgpuPreferredFormat == WGPUTextureFormat_RGBA8UnormSrgb) {
    viewFormats[0] = WGPUTextureFormat_RGBA8Unorm;
    wgpuConfig.viewFormatCount = 1;
    wgpuConfig.viewFormats = viewFormats;
}

[mreinstein]

Another potentially interesting data point: When I run the chrome version of the game on the same Linux machine, I don't see the double gamma correction effect. I think chrome must be passing viewFormat to dawn which avoids the -srgb version