[Webkit-unassigned] [Bug 187553] New: REGRESSION (r232356): After zooming a page in and out, it's possible to temporarily have missing tiles (google.com, apple.com)

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=187553

            Bug ID: 187553
           Summary: REGRESSION (r232356): After zooming a page in and out,
                    it's possible to temporarily have missing tiles
                    (google.com, apple.com)
           Product: WebKit
           Version: WebKit Nightly Build
          Hardware: Unspecified
                OS: Unspecified
            Status: NEW
          Severity: Normal
          Priority: P2
         Component: Layout and Rendering
          Assignee: webkit-unassigned at lists.webkit.org
          Reporter: koivisto at iki.fi
                CC: bfulgham at webkit.org, simon.fraser at apple.com,
                    zalan at apple.com

We ignore zoom scale from UI process if it doesn't match the last remote layer tree transaction. However nothing guarantees that we receive the real scale again until user interacts with the page. After r232356 this can cause visibly missing tiles, before the problem was covered by creating too many of them.

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