[Webkit-unassigned] [Bug 49718] New: [Qt] Canvas doesn't animate on OpenVG backend

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=49718

           Summary: [Qt] Canvas doesn't animate on OpenVG backend
           Product: WebKit
           Version: 528+ (Nightly build)
          Platform: S60 Hardware
        OS/Version: S60 3rd edition
            Status: NEW
          Keywords: Qt
          Severity: Critical
          Priority: P1
         Component: New Bugs
        AssignedTo: webkit-unassigned at lists.webkit.org
        ReportedBy: koshuin at gmail.com


Created an attachment (id=74211)
 --> (https://bugs.webkit.org/attachment.cgi?id=74211&action=review)
simple testcase

Qt targets using OpenVG or other lazy graphics backend don't receive updates on canvas thus no animation based on setInterval or setTimeout works.
Simple testcase demonstrates this issue with drawing 2 lines. Second line drawn after 2 seconds never appears on N8 unless backingstore is destroyed (screensaver,app swap).

This is regression introduced by http://trac.webkit.org/changeset/63606

I set severity to critical as all released Symbian^3 devices use OpenVG.

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