[Webkit-unassigned] [Bug 258933] New: Fullscreen video become blank upon showing image analysis results when WKWebView is laid out using constraints instead of auto resizing masks on Mac.

bugzilla-daemon at webkit.org bugzilla-daemon at webkit.org
Thu Jul 6 09:18:59 PDT 2023


https://bugs.webkit.org/show_bug.cgi?id=258933

            Bug ID: 258933
           Summary: Fullscreen video become blank upon showing image
                    analysis results when WKWebView is laid out using
                    constraints instead of auto resizing masks on Mac.
           Product: WebKit
           Version: WebKit Local Build
          Hardware: Mac (Apple Silicon)
                OS: macOS 13
            Status: NEW
          Severity: Normal
          Priority: P2
         Component: Media
          Assignee: webkit-unassigned at lists.webkit.org
          Reporter: bunnnywong at gmail.com

Created attachment 466951

  --> https://bugs.webkit.org/attachment.cgi?id=466951&action=review

A patch to help reproduce this issue, see the description detailed steps to reproduce

This is an issue we discover while testing our production App.

See the attached screen recording.

Steps to reproduce:

* Apply the attached patch, this changes the WKWebView inside MiniBrowser->WK2BrowserWindowController to use constraints-based layout.

* Build MiniBrowser for Mac and launch it, open an arbitrary website containing `<video>` elements showing any video that contains text. (For example: https://codepen.io/Varo/pen/vLdvMK.)

* Put that video into fullscreen.

* Pause it when there are some text and wait for the image analysis to complete.

* The page would become blank in white below the overlay view of analysis results.

* Minimize the fullscreen window, and put it fullscreen again.

* The fullscreen window would be black. Videos would never be visible on fullscreen until the page is refreshed.

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