How is HDR implemented?

[Rik Cabanier]

Is there any documentation how HDR and wide colorspaces are implemented in chromium?

What is needed from the android side to have this supported?

[Dale Curtis]

gfx::ColorSpace and gfx::ColorTransform handle the lifting when Chrome is compositing. Otherwise we try to pass on gfx::HDRMetadata in some form to the OS compositor. For a long time Android hasn't had the APIs to handle anything other than tunneled HDR. I think in recent Android versions it's possible though. +Vasiliy Telezhnikov 

- dale

[Rik Cabanier]

Thanks!
Is the surface that you draw into not HDR then? What is tunneled HDR?

[Dale Curtis]

https://source.android.com/docs/devices/tv/multimedia-tunneling

I defer to Vasilliy, HDR video playback works, but I'm not sure if that's only for SurfaceControl or also with SurfaceTexture, etc.

- dale

[Rik Cabanier]

Thanks for the information! That helps.

On Tue, Mar 14, 2023 at 9:38 AM Vasiliy Telezhnikov
<vtelez...@google.com> wrote:
>
> Right now Chrome on Android only supports HDR for videos and only if they are displayed as overlays via SurfaceControl. Requires Android S+.
> We're working on full HDR support, but it's not there yet.
>
> - Vasiliy

[Vasiliy Telezhnikov]

Right now Chrome on Android only supports HDR for videos and only if they are displayed as overlays via SurfaceControl. Requires Android S+. 

We're working on full HDR support, but it's not there yet.

- Vasiliy

[Rik Cabanier]

Hi Vasiliy,

Was there any progress on HDR for Android?

On Tue, Mar 14, 2023 at 9:38 AM Vasiliy Telezhnikov <vtelez...@google.com> wrote:

[Vasiliy Telezhnikov]

HDR should work now on Android U+ if the device reports HDR support.

- Vasiliy

[Rik Cabanier]

Thank you!