[Impeller] wide gamut devices are reporting they don't have support for wide gamut #135033
Description
In FlutterView.mm we check to see what the gamut is for the screen that has the flutter view. At some point the setup for the FlutterView has changed such that it's window (and by extension its screen) is nil which leads the gamut to be interpreted as zero, which is srgb.
error log
[VERBOSE-1:FlutterView.mm(72)] Rendering wide gamut colors is turned on but isn't supported, downgrading the color gamut to sRGB.
doctor
[!] Flutter (Channel [user-branch], 3.14.0-14.0.pre.345, on macOS 13.5.2 22G91 darwin-arm64, locale en)
! Flutter version 3.14.0-14.0.pre.345 on channel [user-branch] at /Users/aaclarke/dev/flutter
Currently on an unknown channel. Run `flutter channel` to switch to an official channel.
If that doesn't fix the issue, reinstall Flutter by following instructions at https://flutter.dev/docs/get-started/install.
! Upstream repository unknown source is not a standard remote.
Set environment variable "FLUTTER_GIT_URL" to unknown source to dismiss this error.