Removing some dependencies:
1. The graphic dependency is about picker but we can still implement the attribute without actually having P3 picker. We can convert sRGB value from picker to P3 representation to fulfill the spec requirements. Users would still be only able to choose within sRGB range though. Using P3 for the picker is straightforward but right now doing so is no-op, as it turns out that we don't do color mapping - gradient from P3 white-to-red looks exactly same to sRGB white-to-red even on MacBook P3 display.
2. In the same way, technically we don't have to fix the Android color picker to implement this. Alpha should be disabled until Android gets the picker support though, for feature detection purpose. The Android work would need some actual Android person to take. (gamut detection is possible through `matchMedia("(color-gamut: p3)").matches`.)
Bug 1919718 Comment 8 Edit History
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Removing some dependencies:
1. The graphic dependency is about picker but we can still implement the attribute without actually having P3 picker. We can convert sRGB value from picker to P3 representation to fulfill the spec requirements. Users would still be only able to choose within sRGB range though. Using P3 for the picker is straightforward but right now doing so is no-op, as it turns out that we don't do color mapping - gradient in P3 white-to-red looks exactly same to sRGB white-to-red even on MacBook P3 display.
2. In the same way, technically we don't have to fix the Android color picker to implement this. Alpha should be disabled until Android gets the picker support though, for feature detection purpose. The Android work would need some actual Android person to take. (gamut detection is possible through `matchMedia("(color-gamut: p3)").matches`.)