HDR (DCI-P3 & Rec. 2020) support

[WesselKroos]

Waiting on the completion of the implementation of HDR support in the canvas element:
https://chromestatus.com/feature/5703719636172800
whatwg/html#9461
https://github.com/WICG/canvas-color-space/blob/main/CanvasColorSpaceProposal.md
https://github.com/w3c/ColorWeb-CG/blob/main/hdr_html_canvas_element.md

• Workaround: Separate filter settings for HDR videos.
  Which with users can finetune the minimum/maximum rgb values.
  Note: The color space conversion remains incorrect.
• Support the DCI-P3 (p3) color space
  (Currently not supported by Firefox)
  Firefox bug: https://bugzilla.mozilla.org/show_bug.cgi?id=1771373
• Support the Rec. 2020 (rec2020) color space (Currently not supported by any browser)

[WesselKroos]

There is another feature for the Display P3 colorspace support in canvas elements that was released in Chrome 104 (august 2022):
https://chromestatus.com/feature/4814886323355648

Since that is easier to implement it has been added to the 2.37.25 version

[Askejm]

Any estimate of when this will be added? Have heard a lot of people using this to help uneven burn-in on ultrawide OLEDs but then we can't get proper HDR

[WesselKroos]

Regarding Firefox, that's up to the developers at Mozilla. I think you can follow this Firefox bug:
https://bugzilla.mozilla.org/show_bug.cgi?id=1771373

Once they've implemented display-p3 support for the canvas it should work immediately.

[Askejm]

I see. So could i perhaps mitigate this by disabling WebGL? What does it use then, and would it be using a lot more power on a 3090?

[Askejm]

Nvm disabling webgl renderer makes no difference. That sucks :/

[WesselKroos]

You could try a chromium browser. It should be a bit better because they can extend the color space to DCI-P3.

[Askejm]

@WesselKroos I just noticed when remove black bar enables, I don't get washed out blacks
Black bar enabled and detected:

Black bar detection disabled

Ambient lights completely disabled:

On firefox. It only happens when a black bar is detected and removed

[Askejm]

I've found a workaround:
Disable remove black bar and sidebar (V and B)
Disable reset bars next video
Set sidebars size to 0.1%

[WesselKroos]

Hmm, if that worked you might want to check if toggling the advanced setting "Video artifacts workaround" also works. Then you might be able to keep using the remove black bar feature.

[Askejm]

Yes, that works. Disabling that feature solves the issue

[WesselKroos]

Then, are you using NVidia RTX to watch a non-hdr video in hdr?

[Askejm]

I am on a 3090, but I have RTX super resolution and HDR disabled