Intent to Implement and Ship: DisplayMediaStreamOptions monitorTypeSurfaces
François Beaufort
Contact emails
Explainer
https://github.com/eladalon1983/screen-share-explainers/blob/main/monitorTypeSurfaces_Explainer.md
Specification
https://w3c.github.io/mediacapture-screen-share/#dom-displaymediastreamoptions-monitortypesurfaces
Summary
When getDisplayMedia() is called, the browser offers the user a choice of display surfaces: tabs, windows, or monitors. Using the monitorTypeSurfaces option, the web application may now hint to the browser if it prefers to include display surfaces whose type is monitor among the choices offered to the user.
Blink component
TAG review
https://github.com/w3ctag/design-reviews/issues/892
TAG review status
Pending
Risks
Interoperability and Compatibility
None
Gecko: No signal (https://github.com/mozilla/standards-positions/issues/876) Jan-Ivar Bruaroey from Mozilla has reviewed and approved https://github.com/w3c/mediacapture-screen-share/pull/274.
WebKit: No signal (https://github.com/WebKit/standards-positions/issues/248) Youenn Fablet from Apple has participated in https://www.w3.org/2023/06/27-webrtc-minutes.html#t04 and https://github.com/w3c/mediacapture-screen-share/issues/261#issuecomment-1693090386.
Web developers: Positive Cisco folks have expressed interest in this feature. https://github.com/screen-share/meetings/blob/main/minutes/2023-03-21.md?plain=1#L161
Other signals:
WebView application risks
Does this intent deprecate or change behavior of existing APIs, such that it has potentially high risk for Android WebView-based applications?
None
Debuggability
None
Will this feature be supported on all six Blink platforms (Windows, Mac, Linux, Chrome OS, Android, and Android WebView)?
Supported on all platforms that support getDisplayMedia. Namely, all desktop platforms.
Is this feature fully tested by web-platform-tests?
Yes. See https://wpt.fyi/results/screen-capture/getdisplaymedia.https.html
Flag name on chrome://flags
None
Finch feature name
MonitorTypeSurfaces
Requires code in //chrome?
Yes. In chrome/browser/media/webrtc/display_media_access_handler.cc
Tracking bug
https://bugs.chromium.org/p/chromium/issues/detail?id=1477706
Estimated milestones
Anticipated spec changes
Open questions about a feature may be a source of future web compat or interop issues. Please list open issues (e.g. links to known github issues in the project for the feature specification) whose resolution may introduce web compat/interop risk (e.g., changing to naming or structure of the API in a non-backward-compatible way).
None
Link to entry on the Chrome Platform Status
https://chromestatus.com/feature/5558622137876480
This intent message was generated by Chrome Platform Status.
François Beaufort
Contact emails
Explainer
https://github.com/eladalon1983/screen-share-explainers/blob/main/monitorTypeSurfaces_Explainer.md
Specification
https://w3c.github.io/mediacapture-screen-share/#dom-displaymediastreamoptions-monitortypesurfaces
Summary
When getDisplayMedia() is called, the browser offers the user a choice of display surfaces: tabs, windows, or monitors. Using the monitorTypeSurfaces option, the web application may now hint to the browser if it prefers to include display surfaces whose type is monitor among the choices offered to the user.
Blink component
TAG review
https://github.com/w3ctag/design-reviews/issues/892
TAG review status
Pending
We already filed a TAG review for similar options at https://github.com/w3ctag/design-reviews/issues/744 which was marked as satisfied.
Yoav Weiss
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Mike Taylor
LGTM2
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Chris Harrelson
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