The remaining open issues are: 1.
Whether the API shape should already support gestures other than wheel, or whether such a future extension should only be addressed in the future. 2. Whether the API should allow concurrent forwarding events from multiple source elements or just a single one. 3. Whether the API should explicitly limit forwarding to the intersection of the source element and a relevant rendering element, or whether this is up to the user agent. 4. Whether the API should be exposed on CaptureController, or exposed on HTMLVideoElement and HTMLCanvasElement. During multiple OT extensions, we have made multiple compromises that have closed other issues. However, when it comes to these 4 issues, our suggested compromise that completely accommodated 1-3, was rejected on the grounds that it does not also fix #4. We do not believe that further progress on these issues is possible at this time. We are confident that any future changes to this API will be compatible with what we are shipping now. On Mon, Mar 24, 2025 at 6:55 AM Domenic Denicola <dome...@chromium.org> wrote: > > > On Friday, March 21, 2025 at 4:42:21 AM UTC+9 elad...@google.com wrote: > > Contact emails > > elada...@chromium.org, gui...@chromium.org > > Explainer > > https://github.com/w3c/mediacapture-surface-control/blob/main/README.md > > Specification > > https://w3c.github.io/mediacapture-surface-control > > Design docs > > https://docs.google.com/document/d/10UojDvTJ6ojBEOP7cgBIIaE7WZEfe > s_Qv1eN3A2A0nM/edit?usp=sharing > > Summary > > A Web API that allows Web applications to: > 1. Forward wheel events to a captured tab. > 2. Read and change the zoom level of a captured tab. > > Blink component > > Blink>GetDisplayMedia > <https://issues.chromium.org/issues?q=customfield1222907:%22Blink%3EGetDisplayMedia%22> > > TAG review > > https://github.com/w3ctag/design-reviews/issues/962 > > TAG review status > > Issues addressed > > Origin Trial Name > > Captured Surface Control > > Chromium Trial Name > > CapturedSurfaceControl > > > WebFeature UseCounter name > > kCapturedSurfaceControl > > Risks > > Interoperability and Compatibility > > Gecko: No signal (https://github.com/mozilla/standards-positions/issues/ > 1061) The request for a standards position has no official position. Both > on that issue and in the WebRTC WG, Mozilla's representative supported the > use case; but of the issues he had filed against the spec, some remain > without consensus. > > WebKit: No signal (https://github.com/WebKit/ > standards-positions/issues/388) The request for a standards position has > no official position. In the WebRTC WG, Apple's representative supported > the use case; but of the issues he had filed against the spec, some remain > without consensus. > > > Can you expand on these issues that remain open without consensus, and how > they might impact interoperability and compatibility risks? > > > > Web developers: Strongly positive (https://docs.google.com/ > document/d/1CyKBeo2tGsp_k2HhK6WjDM4dciWEbejUTflKrOVYFvM/edit?usp=sharing) > > Security > > https://w3c.github.io/mediacapture-surface-control/#privacy-and-security- > considerations > > > WebView application risks > > N/A - this feature is built on top of screen-capture, which is not > currently supported on mobile platforms. > > > Debuggability > > N/A > > > Will this feature be supported on all six Blink platforms (Windows, Mac, > Linux, ChromeOS, Android, and Android WebView)? > > No > > Supported on all desktop platforms. (Screen-sharing is not currently > supported on mobile platforms.) > > > Is this feature fully tested by web-platform-tests > <https://chromium.googlesource.com/chromium/src/+/main/docs/testing/web_platform_tests.md> > ? > > No. Given the interaction with the user, the browser's own UX, and between > the capturing and captured tabs, browser tests produced more meaningful > coverage. Substantial coverage of that form exists over multiple unit tests > and end-to-end browser tests. > > > Flag name on about://flags > > captured-surface-control > > Finch feature name > > CapturedDisplaySurface > > Tracking bug > > https://bugs.chromium.org/p/chromium/issues/detail?id=1466247 > > Launch bug > > https://launch.corp.google.com/launch/4268170 > > Sample links > > https://captured-surface-control.glitch.me > > Estimated milestones > > Origin trial desktop first > > 122 > > Origin trial desktop last > > 127 > > Origin trial extension 1 end milestone > > 135 > > Origin trial extension 2 end milestone > > 132 > > Origin trial extension 3 end milestone > > 129 > > DevTrial on desktop > > 122 > > > Anticipated spec changes > > Additional gestures (in addition to scrolling) may be supported in the > future, if the need is articulated by Web developers, and subject to a > separate privacy/security review of those particular gestures. > > > Link to entry on the Chrome Platform Status > > https://chromestatus.com/feature/5092615678066688?gate=5158502187663360 > > Links to previous Intent discussions > > Intent to Prototype: https://groups.google.com/a/ > chromium.org/d/msgid/blink-dev/CAMO6jDPSgR3kX39drHd9t- > JvTKBk%2B7Dg03O6dvowzw-LjQ__1A%40mail.gmail.com > > Intent to Experiment: https://groups.google.com/a/ > chromium.org/d/msgid/blink-dev/CAOMQ%2Bw-DF_BCtdwiaYqrXsan3YNBfT2pAeboT0f1 > F9wmViPPWQ%40mail.gmail.com > > Intent to Extend Experiment 1: https://groups.google.com/a/ > chromium.org/d/msgid/blink-dev/CAMO6jDN%3DJteucLtF5RU%2Bvx9Fbc_ > CBifdWzjGjtW1Z5zqhcvqgA%40mail.gmail.com > > Intent to Extend Experiment 2: https://groups.google.com/a/ > chromium.org/d/msgid/blink-dev/CAM0wra9vLNpe45swTf1Bgm1ZbH% > 3DhBt0iAjN_FK49Y%3DznEea3vg%40mail.gmail.com > > Intent to Extend Experiment 3: https://groups.google.com/a/ > chromium.org/g/blink-dev/c/7MbIEBdHMck/m/UBbWTX-hAgAJ > > > This intent message was generated by Chrome Platform Status > <https://chromestatus.com/>. > > -- You received this message because you are subscribed to the Google Groups "blink-dev" group. 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