A transparent hole in browser

[Nagendra K]

Hi,

I have a requirement where my browser is in foreground and want to show a video running on a different surface in background through the browser. For this I want to make a part of the webpage transparent so the video in background is visible. I was able.to make the whole page transparent but could not make part of it transparent.
Can anyone suggest how to make a part of a webpage transparent?

Thanks and Regards,
Nagendra

[Eric Lawrence]

Can you elaborate on how specifically you were "able to make the whole page transparent"?

The capability requested could have significant security consequences (spoofing).

[Patricia Aas]

I don't know if this is Nagendras issue, however, this is not uncommon in the embedded world, including Android.

The video is hardware decoded and rendered in a separate surface which in the view of the platform composer is behind the GUI surface. And the GUI surface renders a transparent "hole" above the video surface. (See SurfaceView on Android and also handling of DRM content on Android)

I do believe, however, that I have seen code in chromium to set alpha on the background color. But I seem to remember this only being supported by default on Android.

I am not sure how video rendering and decoding is handled in chromium on Android (I haven't gotten that far yet), however, Nagendra, it might be a place to look?

Kind regards,

Patricia Aas

Vivaldi Browser

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[Alok Priyadarshi]

Add ALLOW_OVERLAY metadata to the video frames and search for "overlay" under src/cc.

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