[Webkit-unassigned] [Bug 69151] New: [Qt][WK2] Synchronize tiling with accelerated compositing

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=69151

           Summary: [Qt][WK2] Synchronize tiling with accelerated
                    compositing
           Product: WebKit
           Version: 528+ (Nightly build)
          Platform: Unspecified
        OS/Version: Unspecified
            Status: NEW
          Keywords: Qt
          Severity: Normal
          Priority: P2
         Component: Layout and Rendering
        AssignedTo: webkit-unassigned at lists.webkit.org
        ReportedBy: noam.rosenthal at nokia.com
                CC: hausmann at webkit.org, kenneth at webkit.org,
                    jocelyn.turcotte at nokia.com, kling at webkit.org


Right now tiling works on the non-composited content only, which creates an unnatural distinction between "composited" and "non-composited" content. This results in hard-to-detect bugs, such as composited content looking different than non-composited content.

The idea is to use the tiling functionality in TiledBackingStore and TiledDrawingAreaProxy in each layer, with some optimizations for the non-composited content, and to force compositing mode so that the rendering only goes through a single path.

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